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9a799d71 AK |
1 | /******************************************************************************* |
2 | ||
3 | Intel 10 Gigabit PCI Express Linux driver | |
4 | Copyright(c) 1999 - 2007 Intel Corporation. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms and conditions of the GNU General Public License, | |
8 | version 2, as published by the Free Software Foundation. | |
9 | ||
10 | This program is distributed in the hope it will be useful, but WITHOUT | |
11 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License along with | |
16 | this program; if not, write to the Free Software Foundation, Inc., | |
17 | 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | ||
19 | The full GNU General Public License is included in this distribution in | |
20 | the file called "COPYING". | |
21 | ||
22 | Contact Information: | |
23 | Linux NICS <linux.nics@intel.com> | |
24 | e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
25 | Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
26 | ||
27 | *******************************************************************************/ | |
28 | ||
29 | #include <linux/types.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/pci.h> | |
32 | #include <linux/netdevice.h> | |
33 | #include <linux/vmalloc.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/in.h> | |
36 | #include <linux/ip.h> | |
37 | #include <linux/tcp.h> | |
38 | #include <linux/ipv6.h> | |
39 | #include <net/checksum.h> | |
40 | #include <net/ip6_checksum.h> | |
41 | #include <linux/ethtool.h> | |
42 | #include <linux/if_vlan.h> | |
43 | ||
44 | #include "ixgbe.h" | |
45 | #include "ixgbe_common.h" | |
46 | ||
47 | char ixgbe_driver_name[] = "ixgbe"; | |
9c8eb720 SH |
48 | static const char ixgbe_driver_string[] = |
49 | "Intel(R) 10 Gigabit PCI Express Network Driver"; | |
9a799d71 | 50 | |
8d792cd9 | 51 | #define DRV_VERSION "1.3.18-k4" |
9c8eb720 SH |
52 | const char ixgbe_driver_version[] = DRV_VERSION; |
53 | static const char ixgbe_copyright[] = | |
54 | "Copyright (c) 1999-2007 Intel Corporation."; | |
9a799d71 AK |
55 | |
56 | static const struct ixgbe_info *ixgbe_info_tbl[] = { | |
3957d63d | 57 | [board_82598] = &ixgbe_82598_info, |
9a799d71 AK |
58 | }; |
59 | ||
60 | /* ixgbe_pci_tbl - PCI Device ID Table | |
61 | * | |
62 | * Wildcard entries (PCI_ANY_ID) should come last | |
63 | * Last entry must be all 0s | |
64 | * | |
65 | * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, | |
66 | * Class, Class Mask, private data (not used) } | |
67 | */ | |
68 | static struct pci_device_id ixgbe_pci_tbl[] = { | |
69 | {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), | |
3957d63d | 70 | board_82598 }, |
9a799d71 | 71 | {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), |
3957d63d | 72 | board_82598 }, |
9a799d71 | 73 | {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), |
3957d63d | 74 | board_82598 }, |
8d792cd9 JB |
75 | {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), |
76 | board_82598 }, | |
9a799d71 AK |
77 | |
78 | /* required last entry */ | |
79 | {0, } | |
80 | }; | |
81 | MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl); | |
82 | ||
bd0362dd JC |
83 | #ifdef CONFIG_DCA |
84 | static int ixgbe_notify_dca(struct notifier_block *, unsigned long event, | |
85 | void *p); | |
86 | static struct notifier_block dca_notifier = { | |
87 | .notifier_call = ixgbe_notify_dca, | |
88 | .next = NULL, | |
89 | .priority = 0 | |
90 | }; | |
91 | #endif | |
92 | ||
9a799d71 AK |
93 | MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
94 | MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver"); | |
95 | MODULE_LICENSE("GPL"); | |
96 | MODULE_VERSION(DRV_VERSION); | |
97 | ||
98 | #define DEFAULT_DEBUG_LEVEL_SHIFT 3 | |
99 | ||
5eba3699 AV |
100 | static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter) |
101 | { | |
102 | u32 ctrl_ext; | |
103 | ||
104 | /* Let firmware take over control of h/w */ | |
105 | ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); | |
106 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, | |
107 | ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD); | |
108 | } | |
109 | ||
110 | static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter) | |
111 | { | |
112 | u32 ctrl_ext; | |
113 | ||
114 | /* Let firmware know the driver has taken over */ | |
115 | ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT); | |
116 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT, | |
117 | ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD); | |
118 | } | |
9a799d71 AK |
119 | |
120 | #ifdef DEBUG | |
121 | /** | |
122 | * ixgbe_get_hw_dev_name - return device name string | |
123 | * used by hardware layer to print debugging information | |
124 | **/ | |
125 | char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw) | |
126 | { | |
127 | struct ixgbe_adapter *adapter = hw->back; | |
128 | struct net_device *netdev = adapter->netdev; | |
129 | return netdev->name; | |
130 | } | |
131 | #endif | |
132 | ||
133 | static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry, | |
134 | u8 msix_vector) | |
135 | { | |
136 | u32 ivar, index; | |
137 | ||
138 | msix_vector |= IXGBE_IVAR_ALLOC_VAL; | |
139 | index = (int_alloc_entry >> 2) & 0x1F; | |
140 | ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index)); | |
141 | ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3))); | |
142 | ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3))); | |
143 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar); | |
144 | } | |
145 | ||
146 | static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter, | |
147 | struct ixgbe_tx_buffer | |
148 | *tx_buffer_info) | |
149 | { | |
150 | if (tx_buffer_info->dma) { | |
e01c31a5 | 151 | pci_unmap_page(adapter->pdev, tx_buffer_info->dma, |
9a799d71 AK |
152 | tx_buffer_info->length, PCI_DMA_TODEVICE); |
153 | tx_buffer_info->dma = 0; | |
154 | } | |
155 | if (tx_buffer_info->skb) { | |
156 | dev_kfree_skb_any(tx_buffer_info->skb); | |
157 | tx_buffer_info->skb = NULL; | |
158 | } | |
159 | /* tx_buffer_info must be completely set up in the transmit path */ | |
160 | } | |
161 | ||
162 | static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter, | |
163 | struct ixgbe_ring *tx_ring, | |
e01c31a5 | 164 | unsigned int eop) |
9a799d71 | 165 | { |
e01c31a5 JB |
166 | struct ixgbe_hw *hw = &adapter->hw; |
167 | u32 head, tail; | |
168 | ||
9a799d71 | 169 | /* Detect a transmit hang in hardware, this serializes the |
e01c31a5 JB |
170 | * check with the clearing of time_stamp and movement of eop */ |
171 | head = IXGBE_READ_REG(hw, tx_ring->head); | |
172 | tail = IXGBE_READ_REG(hw, tx_ring->tail); | |
9a799d71 | 173 | adapter->detect_tx_hung = false; |
e01c31a5 JB |
174 | if ((head != tail) && |
175 | tx_ring->tx_buffer_info[eop].time_stamp && | |
9a799d71 AK |
176 | time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) && |
177 | !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) { | |
178 | /* detected Tx unit hang */ | |
e01c31a5 JB |
179 | union ixgbe_adv_tx_desc *tx_desc; |
180 | tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop); | |
9a799d71 | 181 | DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" |
e01c31a5 JB |
182 | " Tx Queue <%d>\n" |
183 | " TDH, TDT <%x>, <%x>\n" | |
9a799d71 AK |
184 | " next_to_use <%x>\n" |
185 | " next_to_clean <%x>\n" | |
186 | "tx_buffer_info[next_to_clean]\n" | |
187 | " time_stamp <%lx>\n" | |
e01c31a5 JB |
188 | " jiffies <%lx>\n", |
189 | tx_ring->queue_index, | |
190 | head, tail, | |
191 | tx_ring->next_to_use, eop, | |
192 | tx_ring->tx_buffer_info[eop].time_stamp, jiffies); | |
9a799d71 AK |
193 | return true; |
194 | } | |
195 | ||
196 | return false; | |
197 | } | |
198 | ||
e092be60 AV |
199 | #define IXGBE_MAX_TXD_PWR 14 |
200 | #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR) | |
201 | ||
202 | /* Tx Descriptors needed, worst case */ | |
203 | #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \ | |
204 | (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0)) | |
205 | #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \ | |
206 | MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */ | |
207 | ||
e01c31a5 JB |
208 | #define GET_TX_HEAD_FROM_RING(ring) (\ |
209 | *(volatile u32 *) \ | |
210 | ((union ixgbe_adv_tx_desc *)(ring)->desc + (ring)->count)) | |
211 | static void ixgbe_tx_timeout(struct net_device *netdev); | |
212 | ||
9a799d71 AK |
213 | /** |
214 | * ixgbe_clean_tx_irq - Reclaim resources after transmit completes | |
215 | * @adapter: board private structure | |
e01c31a5 | 216 | * @tx_ring: tx ring to clean |
9a799d71 AK |
217 | **/ |
218 | static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter, | |
e01c31a5 | 219 | struct ixgbe_ring *tx_ring) |
9a799d71 | 220 | { |
e01c31a5 | 221 | union ixgbe_adv_tx_desc *tx_desc; |
9a799d71 | 222 | struct ixgbe_tx_buffer *tx_buffer_info; |
e01c31a5 JB |
223 | struct net_device *netdev = adapter->netdev; |
224 | struct sk_buff *skb; | |
225 | unsigned int i; | |
226 | u32 head, oldhead; | |
227 | unsigned int count = 0; | |
228 | unsigned int total_bytes = 0, total_packets = 0; | |
9a799d71 | 229 | |
e01c31a5 JB |
230 | rmb(); |
231 | head = GET_TX_HEAD_FROM_RING(tx_ring); | |
232 | head = le32_to_cpu(head); | |
9a799d71 | 233 | i = tx_ring->next_to_clean; |
e01c31a5 JB |
234 | while (1) { |
235 | while (i != head) { | |
9a799d71 AK |
236 | tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); |
237 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
e01c31a5 | 238 | skb = tx_buffer_info->skb; |
9a799d71 | 239 | |
e01c31a5 | 240 | if (skb) { |
e092be60 | 241 | unsigned int segs, bytecount; |
e01c31a5 JB |
242 | |
243 | /* gso_segs is currently only valid for tcp */ | |
e092be60 AV |
244 | segs = skb_shinfo(skb)->gso_segs ?: 1; |
245 | /* multiply data chunks by size of headers */ | |
246 | bytecount = ((segs - 1) * skb_headlen(skb)) + | |
e01c31a5 JB |
247 | skb->len; |
248 | total_packets += segs; | |
249 | total_bytes += bytecount; | |
e092be60 | 250 | } |
e01c31a5 | 251 | |
9a799d71 | 252 | ixgbe_unmap_and_free_tx_resource(adapter, |
e01c31a5 | 253 | tx_buffer_info); |
9a799d71 AK |
254 | |
255 | i++; | |
256 | if (i == tx_ring->count) | |
257 | i = 0; | |
9a799d71 | 258 | |
e01c31a5 JB |
259 | count++; |
260 | if (count == tx_ring->count) | |
261 | goto done_cleaning; | |
262 | } | |
263 | oldhead = head; | |
264 | rmb(); | |
265 | head = GET_TX_HEAD_FROM_RING(tx_ring); | |
266 | head = le32_to_cpu(head); | |
267 | if (head == oldhead) | |
268 | goto done_cleaning; | |
269 | } /* while (1) */ | |
270 | ||
271 | done_cleaning: | |
9a799d71 AK |
272 | tx_ring->next_to_clean = i; |
273 | ||
e092be60 | 274 | #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) |
e01c31a5 JB |
275 | if (unlikely(count && netif_carrier_ok(netdev) && |
276 | (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) { | |
e092be60 AV |
277 | /* Make sure that anybody stopping the queue after this |
278 | * sees the new next_to_clean. | |
279 | */ | |
280 | smp_mb(); | |
30eba97a AV |
281 | if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) && |
282 | !test_bit(__IXGBE_DOWN, &adapter->state)) { | |
283 | netif_wake_subqueue(netdev, tx_ring->queue_index); | |
e01c31a5 | 284 | ++adapter->restart_queue; |
30eba97a | 285 | } |
e092be60 | 286 | } |
9a799d71 | 287 | |
e01c31a5 JB |
288 | if (adapter->detect_tx_hung) { |
289 | if (ixgbe_check_tx_hang(adapter, tx_ring, i)) { | |
290 | /* schedule immediate reset if we believe we hung */ | |
291 | DPRINTK(PROBE, INFO, | |
292 | "tx hang %d detected, resetting adapter\n", | |
293 | adapter->tx_timeout_count + 1); | |
294 | ixgbe_tx_timeout(adapter->netdev); | |
295 | } | |
296 | } | |
9a799d71 | 297 | |
e01c31a5 JB |
298 | /* re-arm the interrupt */ |
299 | if ((total_packets >= tx_ring->work_limit) || | |
300 | (count == tx_ring->count)) | |
301 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->v_idx); | |
9a799d71 | 302 | |
e01c31a5 JB |
303 | tx_ring->total_bytes += total_bytes; |
304 | tx_ring->total_packets += total_packets; | |
305 | tx_ring->stats.bytes += total_bytes; | |
306 | tx_ring->stats.packets += total_packets; | |
307 | adapter->net_stats.tx_bytes += total_bytes; | |
308 | adapter->net_stats.tx_packets += total_packets; | |
309 | return (total_packets ? true : false); | |
9a799d71 AK |
310 | } |
311 | ||
bd0362dd JC |
312 | #ifdef CONFIG_DCA |
313 | static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter, | |
3a581073 | 314 | struct ixgbe_ring *rx_ring) |
bd0362dd JC |
315 | { |
316 | u32 rxctrl; | |
317 | int cpu = get_cpu(); | |
3a581073 | 318 | int q = rx_ring - adapter->rx_ring; |
bd0362dd | 319 | |
3a581073 | 320 | if (rx_ring->cpu != cpu) { |
bd0362dd JC |
321 | rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q)); |
322 | rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK; | |
323 | rxctrl |= dca_get_tag(cpu); | |
324 | rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN; | |
325 | rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN; | |
326 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl); | |
3a581073 | 327 | rx_ring->cpu = cpu; |
bd0362dd JC |
328 | } |
329 | put_cpu(); | |
330 | } | |
331 | ||
332 | static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter, | |
3a581073 | 333 | struct ixgbe_ring *tx_ring) |
bd0362dd JC |
334 | { |
335 | u32 txctrl; | |
336 | int cpu = get_cpu(); | |
3a581073 | 337 | int q = tx_ring - adapter->tx_ring; |
bd0362dd | 338 | |
3a581073 | 339 | if (tx_ring->cpu != cpu) { |
bd0362dd JC |
340 | txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q)); |
341 | txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK; | |
342 | txctrl |= dca_get_tag(cpu); | |
343 | txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN; | |
344 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl); | |
3a581073 | 345 | tx_ring->cpu = cpu; |
bd0362dd JC |
346 | } |
347 | put_cpu(); | |
348 | } | |
349 | ||
350 | static void ixgbe_setup_dca(struct ixgbe_adapter *adapter) | |
351 | { | |
352 | int i; | |
353 | ||
354 | if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED)) | |
355 | return; | |
356 | ||
357 | for (i = 0; i < adapter->num_tx_queues; i++) { | |
358 | adapter->tx_ring[i].cpu = -1; | |
359 | ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]); | |
360 | } | |
361 | for (i = 0; i < adapter->num_rx_queues; i++) { | |
362 | adapter->rx_ring[i].cpu = -1; | |
363 | ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]); | |
364 | } | |
365 | } | |
366 | ||
367 | static int __ixgbe_notify_dca(struct device *dev, void *data) | |
368 | { | |
369 | struct net_device *netdev = dev_get_drvdata(dev); | |
370 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
371 | unsigned long event = *(unsigned long *)data; | |
372 | ||
373 | switch (event) { | |
374 | case DCA_PROVIDER_ADD: | |
375 | adapter->flags |= IXGBE_FLAG_DCA_ENABLED; | |
376 | /* Always use CB2 mode, difference is masked | |
377 | * in the CB driver. */ | |
378 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2); | |
652f093f | 379 | if (dca_add_requester(dev) == 0) { |
bd0362dd JC |
380 | ixgbe_setup_dca(adapter); |
381 | break; | |
382 | } | |
383 | /* Fall Through since DCA is disabled. */ | |
384 | case DCA_PROVIDER_REMOVE: | |
385 | if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { | |
386 | dca_remove_requester(dev); | |
387 | adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; | |
388 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); | |
389 | } | |
390 | break; | |
391 | } | |
392 | ||
652f093f | 393 | return 0; |
bd0362dd JC |
394 | } |
395 | ||
396 | #endif /* CONFIG_DCA */ | |
9a799d71 AK |
397 | /** |
398 | * ixgbe_receive_skb - Send a completed packet up the stack | |
399 | * @adapter: board private structure | |
400 | * @skb: packet to send up | |
177db6ff MC |
401 | * @status: hardware indication of status of receive |
402 | * @rx_ring: rx descriptor ring (for a specific queue) to setup | |
403 | * @rx_desc: rx descriptor | |
9a799d71 AK |
404 | **/ |
405 | static void ixgbe_receive_skb(struct ixgbe_adapter *adapter, | |
177db6ff MC |
406 | struct sk_buff *skb, u8 status, |
407 | struct ixgbe_ring *ring, | |
408 | union ixgbe_adv_rx_desc *rx_desc) | |
9a799d71 | 409 | { |
177db6ff MC |
410 | bool is_vlan = (status & IXGBE_RXD_STAT_VP); |
411 | u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan); | |
9a799d71 | 412 | |
177db6ff MC |
413 | if (adapter->netdev->features & NETIF_F_LRO && |
414 | skb->ip_summed == CHECKSUM_UNNECESSARY) { | |
9a799d71 | 415 | if (adapter->vlgrp && is_vlan) |
177db6ff MC |
416 | lro_vlan_hwaccel_receive_skb(&ring->lro_mgr, skb, |
417 | adapter->vlgrp, tag, | |
418 | rx_desc); | |
9a799d71 | 419 | else |
177db6ff MC |
420 | lro_receive_skb(&ring->lro_mgr, skb, rx_desc); |
421 | ring->lro_used = true; | |
422 | } else { | |
423 | if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) { | |
424 | if (adapter->vlgrp && is_vlan) | |
425 | vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag); | |
426 | else | |
427 | netif_receive_skb(skb); | |
428 | } else { | |
429 | if (adapter->vlgrp && is_vlan) | |
430 | vlan_hwaccel_rx(skb, adapter->vlgrp, tag); | |
431 | else | |
432 | netif_rx(skb); | |
433 | } | |
9a799d71 AK |
434 | } |
435 | } | |
436 | ||
e59bd25d AV |
437 | /** |
438 | * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum | |
439 | * @adapter: address of board private structure | |
440 | * @status_err: hardware indication of status of receive | |
441 | * @skb: skb currently being received and modified | |
442 | **/ | |
9a799d71 | 443 | static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter, |
712744be | 444 | u32 status_err, struct sk_buff *skb) |
9a799d71 AK |
445 | { |
446 | skb->ip_summed = CHECKSUM_NONE; | |
447 | ||
712744be JB |
448 | /* Rx csum disabled */ |
449 | if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED)) | |
9a799d71 | 450 | return; |
e59bd25d AV |
451 | |
452 | /* if IP and error */ | |
453 | if ((status_err & IXGBE_RXD_STAT_IPCS) && | |
454 | (status_err & IXGBE_RXDADV_ERR_IPE)) { | |
9a799d71 AK |
455 | adapter->hw_csum_rx_error++; |
456 | return; | |
457 | } | |
e59bd25d AV |
458 | |
459 | if (!(status_err & IXGBE_RXD_STAT_L4CS)) | |
460 | return; | |
461 | ||
462 | if (status_err & IXGBE_RXDADV_ERR_TCPE) { | |
463 | adapter->hw_csum_rx_error++; | |
464 | return; | |
465 | } | |
466 | ||
9a799d71 | 467 | /* It must be a TCP or UDP packet with a valid checksum */ |
e59bd25d | 468 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
9a799d71 AK |
469 | adapter->hw_csum_rx_good++; |
470 | } | |
471 | ||
472 | /** | |
473 | * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split | |
474 | * @adapter: address of board private structure | |
475 | **/ | |
476 | static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter, | |
7c6e0a43 JB |
477 | struct ixgbe_ring *rx_ring, |
478 | int cleaned_count) | |
9a799d71 AK |
479 | { |
480 | struct net_device *netdev = adapter->netdev; | |
481 | struct pci_dev *pdev = adapter->pdev; | |
482 | union ixgbe_adv_rx_desc *rx_desc; | |
3a581073 | 483 | struct ixgbe_rx_buffer *bi; |
9a799d71 | 484 | unsigned int i; |
7c6e0a43 | 485 | unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN; |
9a799d71 AK |
486 | |
487 | i = rx_ring->next_to_use; | |
3a581073 | 488 | bi = &rx_ring->rx_buffer_info[i]; |
9a799d71 AK |
489 | |
490 | while (cleaned_count--) { | |
491 | rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); | |
492 | ||
3a581073 JB |
493 | if (!bi->page && |
494 | (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) { | |
495 | bi->page = alloc_page(GFP_ATOMIC); | |
496 | if (!bi->page) { | |
9a799d71 AK |
497 | adapter->alloc_rx_page_failed++; |
498 | goto no_buffers; | |
499 | } | |
3a581073 | 500 | bi->page_dma = pci_map_page(pdev, bi->page, 0, |
7c6e0a43 JB |
501 | PAGE_SIZE, |
502 | PCI_DMA_FROMDEVICE); | |
9a799d71 AK |
503 | } |
504 | ||
3a581073 JB |
505 | if (!bi->skb) { |
506 | struct sk_buff *skb = netdev_alloc_skb(netdev, bufsz); | |
9a799d71 AK |
507 | |
508 | if (!skb) { | |
509 | adapter->alloc_rx_buff_failed++; | |
510 | goto no_buffers; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Make buffer alignment 2 beyond a 16 byte boundary | |
515 | * this will result in a 16 byte aligned IP header after | |
516 | * the 14 byte MAC header is removed | |
517 | */ | |
518 | skb_reserve(skb, NET_IP_ALIGN); | |
519 | ||
3a581073 JB |
520 | bi->skb = skb; |
521 | bi->dma = pci_map_single(pdev, skb->data, bufsz, | |
522 | PCI_DMA_FROMDEVICE); | |
9a799d71 AK |
523 | } |
524 | /* Refresh the desc even if buffer_addrs didn't change because | |
525 | * each write-back erases this info. */ | |
526 | if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { | |
3a581073 JB |
527 | rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma); |
528 | rx_desc->read.hdr_addr = cpu_to_le64(bi->dma); | |
9a799d71 | 529 | } else { |
3a581073 | 530 | rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); |
9a799d71 AK |
531 | } |
532 | ||
533 | i++; | |
534 | if (i == rx_ring->count) | |
535 | i = 0; | |
3a581073 | 536 | bi = &rx_ring->rx_buffer_info[i]; |
9a799d71 | 537 | } |
7c6e0a43 | 538 | |
9a799d71 AK |
539 | no_buffers: |
540 | if (rx_ring->next_to_use != i) { | |
541 | rx_ring->next_to_use = i; | |
542 | if (i-- == 0) | |
543 | i = (rx_ring->count - 1); | |
544 | ||
545 | /* | |
546 | * Force memory writes to complete before letting h/w | |
547 | * know there are new descriptors to fetch. (Only | |
548 | * applicable for weak-ordered memory model archs, | |
549 | * such as IA-64). | |
550 | */ | |
551 | wmb(); | |
552 | writel(i, adapter->hw.hw_addr + rx_ring->tail); | |
553 | } | |
554 | } | |
555 | ||
7c6e0a43 JB |
556 | static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc) |
557 | { | |
558 | return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info; | |
559 | } | |
560 | ||
561 | static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc) | |
562 | { | |
563 | return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info; | |
564 | } | |
565 | ||
9a799d71 | 566 | static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter, |
7c6e0a43 JB |
567 | struct ixgbe_ring *rx_ring, |
568 | int *work_done, int work_to_do) | |
9a799d71 AK |
569 | { |
570 | struct net_device *netdev = adapter->netdev; | |
571 | struct pci_dev *pdev = adapter->pdev; | |
572 | union ixgbe_adv_rx_desc *rx_desc, *next_rxd; | |
573 | struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer; | |
574 | struct sk_buff *skb; | |
575 | unsigned int i; | |
7c6e0a43 | 576 | u32 len, staterr; |
177db6ff MC |
577 | u16 hdr_info; |
578 | bool cleaned = false; | |
9a799d71 | 579 | int cleaned_count = 0; |
d2f4fbe2 | 580 | unsigned int total_rx_bytes = 0, total_rx_packets = 0; |
9a799d71 AK |
581 | |
582 | i = rx_ring->next_to_clean; | |
9a799d71 AK |
583 | rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i); |
584 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
585 | rx_buffer_info = &rx_ring->rx_buffer_info[i]; | |
9a799d71 AK |
586 | |
587 | while (staterr & IXGBE_RXD_STAT_DD) { | |
7c6e0a43 | 588 | u32 upper_len = 0; |
9a799d71 AK |
589 | if (*work_done >= work_to_do) |
590 | break; | |
591 | (*work_done)++; | |
592 | ||
593 | if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { | |
7c6e0a43 JB |
594 | hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc)); |
595 | len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >> | |
596 | IXGBE_RXDADV_HDRBUFLEN_SHIFT; | |
9a799d71 AK |
597 | if (hdr_info & IXGBE_RXDADV_SPH) |
598 | adapter->rx_hdr_split++; | |
599 | if (len > IXGBE_RX_HDR_SIZE) | |
600 | len = IXGBE_RX_HDR_SIZE; | |
601 | upper_len = le16_to_cpu(rx_desc->wb.upper.length); | |
7c6e0a43 | 602 | } else { |
9a799d71 | 603 | len = le16_to_cpu(rx_desc->wb.upper.length); |
7c6e0a43 | 604 | } |
9a799d71 AK |
605 | |
606 | cleaned = true; | |
607 | skb = rx_buffer_info->skb; | |
608 | prefetch(skb->data - NET_IP_ALIGN); | |
609 | rx_buffer_info->skb = NULL; | |
610 | ||
611 | if (len && !skb_shinfo(skb)->nr_frags) { | |
612 | pci_unmap_single(pdev, rx_buffer_info->dma, | |
7c6e0a43 JB |
613 | rx_ring->rx_buf_len + NET_IP_ALIGN, |
614 | PCI_DMA_FROMDEVICE); | |
9a799d71 AK |
615 | skb_put(skb, len); |
616 | } | |
617 | ||
618 | if (upper_len) { | |
619 | pci_unmap_page(pdev, rx_buffer_info->page_dma, | |
620 | PAGE_SIZE, PCI_DMA_FROMDEVICE); | |
621 | rx_buffer_info->page_dma = 0; | |
622 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, | |
623 | rx_buffer_info->page, 0, upper_len); | |
624 | rx_buffer_info->page = NULL; | |
625 | ||
626 | skb->len += upper_len; | |
627 | skb->data_len += upper_len; | |
628 | skb->truesize += upper_len; | |
629 | } | |
630 | ||
631 | i++; | |
632 | if (i == rx_ring->count) | |
633 | i = 0; | |
634 | next_buffer = &rx_ring->rx_buffer_info[i]; | |
635 | ||
636 | next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i); | |
637 | prefetch(next_rxd); | |
638 | ||
639 | cleaned_count++; | |
640 | if (staterr & IXGBE_RXD_STAT_EOP) { | |
641 | rx_ring->stats.packets++; | |
642 | rx_ring->stats.bytes += skb->len; | |
643 | } else { | |
644 | rx_buffer_info->skb = next_buffer->skb; | |
645 | rx_buffer_info->dma = next_buffer->dma; | |
646 | next_buffer->skb = skb; | |
647 | adapter->non_eop_descs++; | |
648 | goto next_desc; | |
649 | } | |
650 | ||
651 | if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) { | |
652 | dev_kfree_skb_irq(skb); | |
653 | goto next_desc; | |
654 | } | |
655 | ||
656 | ixgbe_rx_checksum(adapter, staterr, skb); | |
d2f4fbe2 AV |
657 | |
658 | /* probably a little skewed due to removing CRC */ | |
659 | total_rx_bytes += skb->len; | |
660 | total_rx_packets++; | |
661 | ||
9a799d71 | 662 | skb->protocol = eth_type_trans(skb, netdev); |
177db6ff | 663 | ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc); |
9a799d71 AK |
664 | netdev->last_rx = jiffies; |
665 | ||
666 | next_desc: | |
667 | rx_desc->wb.upper.status_error = 0; | |
668 | ||
669 | /* return some buffers to hardware, one at a time is too slow */ | |
670 | if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) { | |
671 | ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count); | |
672 | cleaned_count = 0; | |
673 | } | |
674 | ||
675 | /* use prefetched values */ | |
676 | rx_desc = next_rxd; | |
677 | rx_buffer_info = next_buffer; | |
678 | ||
679 | staterr = le32_to_cpu(rx_desc->wb.upper.status_error); | |
177db6ff MC |
680 | } |
681 | ||
682 | if (rx_ring->lro_used) { | |
683 | lro_flush_all(&rx_ring->lro_mgr); | |
684 | rx_ring->lro_used = false; | |
9a799d71 AK |
685 | } |
686 | ||
687 | rx_ring->next_to_clean = i; | |
688 | cleaned_count = IXGBE_DESC_UNUSED(rx_ring); | |
689 | ||
690 | if (cleaned_count) | |
691 | ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count); | |
692 | ||
f494e8fa AV |
693 | rx_ring->total_packets += total_rx_packets; |
694 | rx_ring->total_bytes += total_rx_bytes; | |
695 | adapter->net_stats.rx_bytes += total_rx_bytes; | |
696 | adapter->net_stats.rx_packets += total_rx_packets; | |
697 | ||
9a799d71 AK |
698 | return cleaned; |
699 | } | |
700 | ||
021230d4 | 701 | static int ixgbe_clean_rxonly(struct napi_struct *, int); |
9a799d71 AK |
702 | /** |
703 | * ixgbe_configure_msix - Configure MSI-X hardware | |
704 | * @adapter: board private structure | |
705 | * | |
706 | * ixgbe_configure_msix sets up the hardware to properly generate MSI-X | |
707 | * interrupts. | |
708 | **/ | |
709 | static void ixgbe_configure_msix(struct ixgbe_adapter *adapter) | |
710 | { | |
021230d4 AV |
711 | struct ixgbe_q_vector *q_vector; |
712 | int i, j, q_vectors, v_idx, r_idx; | |
713 | u32 mask; | |
9a799d71 | 714 | |
021230d4 | 715 | q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; |
9a799d71 | 716 | |
021230d4 AV |
717 | /* Populate the IVAR table and set the ITR values to the |
718 | * corresponding register. | |
719 | */ | |
720 | for (v_idx = 0; v_idx < q_vectors; v_idx++) { | |
721 | q_vector = &adapter->q_vector[v_idx]; | |
722 | /* XXX for_each_bit(...) */ | |
723 | r_idx = find_first_bit(q_vector->rxr_idx, | |
724 | adapter->num_rx_queues); | |
725 | ||
726 | for (i = 0; i < q_vector->rxr_count; i++) { | |
727 | j = adapter->rx_ring[r_idx].reg_idx; | |
728 | ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx); | |
729 | r_idx = find_next_bit(q_vector->rxr_idx, | |
730 | adapter->num_rx_queues, | |
731 | r_idx + 1); | |
732 | } | |
733 | r_idx = find_first_bit(q_vector->txr_idx, | |
734 | adapter->num_tx_queues); | |
735 | ||
736 | for (i = 0; i < q_vector->txr_count; i++) { | |
737 | j = adapter->tx_ring[r_idx].reg_idx; | |
738 | ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx); | |
739 | r_idx = find_next_bit(q_vector->txr_idx, | |
740 | adapter->num_tx_queues, | |
741 | r_idx + 1); | |
742 | } | |
743 | ||
744 | /* if this is a tx only vector use half the irq (tx) rate */ | |
745 | if (q_vector->txr_count && !q_vector->rxr_count) | |
746 | q_vector->eitr = adapter->tx_eitr; | |
747 | else | |
748 | /* rx only or mixed */ | |
749 | q_vector->eitr = adapter->rx_eitr; | |
750 | ||
751 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), | |
752 | EITR_INTS_PER_SEC_TO_REG(q_vector->eitr)); | |
9a799d71 AK |
753 | } |
754 | ||
021230d4 AV |
755 | ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx); |
756 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950); | |
757 | ||
758 | /* set up to autoclear timer, lsc, and the vectors */ | |
759 | mask = IXGBE_EIMS_ENABLE_MASK; | |
760 | mask &= ~IXGBE_EIMS_OTHER; | |
761 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask); | |
9a799d71 AK |
762 | } |
763 | ||
f494e8fa AV |
764 | enum latency_range { |
765 | lowest_latency = 0, | |
766 | low_latency = 1, | |
767 | bulk_latency = 2, | |
768 | latency_invalid = 255 | |
769 | }; | |
770 | ||
771 | /** | |
772 | * ixgbe_update_itr - update the dynamic ITR value based on statistics | |
773 | * @adapter: pointer to adapter | |
774 | * @eitr: eitr setting (ints per sec) to give last timeslice | |
775 | * @itr_setting: current throttle rate in ints/second | |
776 | * @packets: the number of packets during this measurement interval | |
777 | * @bytes: the number of bytes during this measurement interval | |
778 | * | |
779 | * Stores a new ITR value based on packets and byte | |
780 | * counts during the last interrupt. The advantage of per interrupt | |
781 | * computation is faster updates and more accurate ITR for the current | |
782 | * traffic pattern. Constants in this function were computed | |
783 | * based on theoretical maximum wire speed and thresholds were set based | |
784 | * on testing data as well as attempting to minimize response time | |
785 | * while increasing bulk throughput. | |
786 | * this functionality is controlled by the InterruptThrottleRate module | |
787 | * parameter (see ixgbe_param.c) | |
788 | **/ | |
789 | static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter, | |
790 | u32 eitr, u8 itr_setting, | |
791 | int packets, int bytes) | |
792 | { | |
793 | unsigned int retval = itr_setting; | |
794 | u32 timepassed_us; | |
795 | u64 bytes_perint; | |
796 | ||
797 | if (packets == 0) | |
798 | goto update_itr_done; | |
799 | ||
800 | ||
801 | /* simple throttlerate management | |
802 | * 0-20MB/s lowest (100000 ints/s) | |
803 | * 20-100MB/s low (20000 ints/s) | |
804 | * 100-1249MB/s bulk (8000 ints/s) | |
805 | */ | |
806 | /* what was last interrupt timeslice? */ | |
807 | timepassed_us = 1000000/eitr; | |
808 | bytes_perint = bytes / timepassed_us; /* bytes/usec */ | |
809 | ||
810 | switch (itr_setting) { | |
811 | case lowest_latency: | |
812 | if (bytes_perint > adapter->eitr_low) | |
813 | retval = low_latency; | |
814 | break; | |
815 | case low_latency: | |
816 | if (bytes_perint > adapter->eitr_high) | |
817 | retval = bulk_latency; | |
818 | else if (bytes_perint <= adapter->eitr_low) | |
819 | retval = lowest_latency; | |
820 | break; | |
821 | case bulk_latency: | |
822 | if (bytes_perint <= adapter->eitr_high) | |
823 | retval = low_latency; | |
824 | break; | |
825 | } | |
826 | ||
827 | update_itr_done: | |
828 | return retval; | |
829 | } | |
830 | ||
831 | static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector) | |
832 | { | |
833 | struct ixgbe_adapter *adapter = q_vector->adapter; | |
834 | struct ixgbe_hw *hw = &adapter->hw; | |
835 | u32 new_itr; | |
836 | u8 current_itr, ret_itr; | |
837 | int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) / | |
838 | sizeof(struct ixgbe_q_vector); | |
839 | struct ixgbe_ring *rx_ring, *tx_ring; | |
840 | ||
841 | r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); | |
842 | for (i = 0; i < q_vector->txr_count; i++) { | |
843 | tx_ring = &(adapter->tx_ring[r_idx]); | |
844 | ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, | |
845 | q_vector->tx_eitr, | |
846 | tx_ring->total_packets, | |
847 | tx_ring->total_bytes); | |
848 | /* if the result for this queue would decrease interrupt | |
849 | * rate for this vector then use that result */ | |
850 | q_vector->tx_eitr = ((q_vector->tx_eitr > ret_itr) ? | |
851 | q_vector->tx_eitr - 1 : ret_itr); | |
852 | r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, | |
853 | r_idx + 1); | |
854 | } | |
855 | ||
856 | r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); | |
857 | for (i = 0; i < q_vector->rxr_count; i++) { | |
858 | rx_ring = &(adapter->rx_ring[r_idx]); | |
859 | ret_itr = ixgbe_update_itr(adapter, q_vector->eitr, | |
860 | q_vector->rx_eitr, | |
861 | rx_ring->total_packets, | |
862 | rx_ring->total_bytes); | |
863 | /* if the result for this queue would decrease interrupt | |
864 | * rate for this vector then use that result */ | |
865 | q_vector->rx_eitr = ((q_vector->rx_eitr > ret_itr) ? | |
866 | q_vector->rx_eitr - 1 : ret_itr); | |
867 | r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues, | |
868 | r_idx + 1); | |
869 | } | |
870 | ||
871 | current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr); | |
872 | ||
873 | switch (current_itr) { | |
874 | /* counts and packets in update_itr are dependent on these numbers */ | |
875 | case lowest_latency: | |
876 | new_itr = 100000; | |
877 | break; | |
878 | case low_latency: | |
879 | new_itr = 20000; /* aka hwitr = ~200 */ | |
880 | break; | |
881 | case bulk_latency: | |
882 | default: | |
883 | new_itr = 8000; | |
884 | break; | |
885 | } | |
886 | ||
887 | if (new_itr != q_vector->eitr) { | |
888 | u32 itr_reg; | |
889 | /* do an exponential smoothing */ | |
890 | new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); | |
891 | q_vector->eitr = new_itr; | |
892 | itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); | |
893 | /* must write high and low 16 bits to reset counter */ | |
894 | DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx, | |
895 | itr_reg); | |
896 | IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16); | |
897 | } | |
898 | ||
899 | return; | |
900 | } | |
901 | ||
9a799d71 AK |
902 | static irqreturn_t ixgbe_msix_lsc(int irq, void *data) |
903 | { | |
904 | struct net_device *netdev = data; | |
905 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
906 | struct ixgbe_hw *hw = &adapter->hw; | |
907 | u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR); | |
908 | ||
909 | if (eicr & IXGBE_EICR_LSC) { | |
910 | adapter->lsc_int++; | |
911 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) | |
912 | mod_timer(&adapter->watchdog_timer, jiffies); | |
913 | } | |
d4f80882 AV |
914 | |
915 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) | |
916 | IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER); | |
9a799d71 AK |
917 | |
918 | return IRQ_HANDLED; | |
919 | } | |
920 | ||
921 | static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data) | |
922 | { | |
021230d4 AV |
923 | struct ixgbe_q_vector *q_vector = data; |
924 | struct ixgbe_adapter *adapter = q_vector->adapter; | |
3a581073 | 925 | struct ixgbe_ring *tx_ring; |
021230d4 AV |
926 | int i, r_idx; |
927 | ||
928 | if (!q_vector->txr_count) | |
929 | return IRQ_HANDLED; | |
930 | ||
931 | r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues); | |
932 | for (i = 0; i < q_vector->txr_count; i++) { | |
3a581073 | 933 | tx_ring = &(adapter->tx_ring[r_idx]); |
bd0362dd JC |
934 | #ifdef CONFIG_DCA |
935 | if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) | |
3a581073 | 936 | ixgbe_update_tx_dca(adapter, tx_ring); |
bd0362dd | 937 | #endif |
3a581073 JB |
938 | tx_ring->total_bytes = 0; |
939 | tx_ring->total_packets = 0; | |
940 | ixgbe_clean_tx_irq(adapter, tx_ring); | |
021230d4 AV |
941 | r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues, |
942 | r_idx + 1); | |
943 | } | |
9a799d71 | 944 | |
9a799d71 AK |
945 | return IRQ_HANDLED; |
946 | } | |
947 | ||
021230d4 AV |
948 | /** |
949 | * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues) | |
950 | * @irq: unused | |
951 | * @data: pointer to our q_vector struct for this interrupt vector | |
952 | **/ | |
9a799d71 AK |
953 | static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data) |
954 | { | |
021230d4 AV |
955 | struct ixgbe_q_vector *q_vector = data; |
956 | struct ixgbe_adapter *adapter = q_vector->adapter; | |
3a581073 | 957 | struct ixgbe_ring *rx_ring; |
021230d4 AV |
958 | int r_idx; |
959 | ||
960 | r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); | |
961 | if (!q_vector->rxr_count) | |
962 | return IRQ_HANDLED; | |
963 | ||
3a581073 | 964 | rx_ring = &(adapter->rx_ring[r_idx]); |
021230d4 | 965 | /* disable interrupts on this vector only */ |
3a581073 JB |
966 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx); |
967 | rx_ring->total_bytes = 0; | |
968 | rx_ring->total_packets = 0; | |
021230d4 AV |
969 | netif_rx_schedule(adapter->netdev, &q_vector->napi); |
970 | ||
971 | return IRQ_HANDLED; | |
972 | } | |
973 | ||
974 | static irqreturn_t ixgbe_msix_clean_many(int irq, void *data) | |
975 | { | |
976 | ixgbe_msix_clean_rx(irq, data); | |
977 | ixgbe_msix_clean_tx(irq, data); | |
9a799d71 | 978 | |
9a799d71 AK |
979 | return IRQ_HANDLED; |
980 | } | |
981 | ||
021230d4 AV |
982 | /** |
983 | * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine | |
984 | * @napi: napi struct with our devices info in it | |
985 | * @budget: amount of work driver is allowed to do this pass, in packets | |
986 | * | |
987 | **/ | |
9a799d71 AK |
988 | static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget) |
989 | { | |
021230d4 AV |
990 | struct ixgbe_q_vector *q_vector = |
991 | container_of(napi, struct ixgbe_q_vector, napi); | |
992 | struct ixgbe_adapter *adapter = q_vector->adapter; | |
3a581073 | 993 | struct ixgbe_ring *rx_ring; |
9a799d71 | 994 | int work_done = 0; |
021230d4 | 995 | long r_idx; |
9a799d71 | 996 | |
021230d4 | 997 | r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues); |
3a581073 | 998 | rx_ring = &(adapter->rx_ring[r_idx]); |
bd0362dd JC |
999 | #ifdef CONFIG_DCA |
1000 | if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) | |
3a581073 | 1001 | ixgbe_update_rx_dca(adapter, rx_ring); |
bd0362dd | 1002 | #endif |
9a799d71 | 1003 | |
3a581073 | 1004 | ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget); |
9a799d71 | 1005 | |
021230d4 AV |
1006 | /* If all Rx work done, exit the polling mode */ |
1007 | if (work_done < budget) { | |
1008 | netif_rx_complete(adapter->netdev, napi); | |
f494e8fa AV |
1009 | if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS) |
1010 | ixgbe_set_itr_msix(q_vector); | |
9a799d71 | 1011 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) |
3a581073 | 1012 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rx_ring->v_idx); |
9a799d71 AK |
1013 | } |
1014 | ||
1015 | return work_done; | |
1016 | } | |
1017 | ||
021230d4 AV |
1018 | static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx, |
1019 | int r_idx) | |
1020 | { | |
1021 | a->q_vector[v_idx].adapter = a; | |
1022 | set_bit(r_idx, a->q_vector[v_idx].rxr_idx); | |
1023 | a->q_vector[v_idx].rxr_count++; | |
1024 | a->rx_ring[r_idx].v_idx = 1 << v_idx; | |
1025 | } | |
1026 | ||
1027 | static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx, | |
1028 | int r_idx) | |
1029 | { | |
1030 | a->q_vector[v_idx].adapter = a; | |
1031 | set_bit(r_idx, a->q_vector[v_idx].txr_idx); | |
1032 | a->q_vector[v_idx].txr_count++; | |
1033 | a->tx_ring[r_idx].v_idx = 1 << v_idx; | |
1034 | } | |
1035 | ||
9a799d71 | 1036 | /** |
021230d4 AV |
1037 | * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors |
1038 | * @adapter: board private structure to initialize | |
1039 | * @vectors: allotted vector count for descriptor rings | |
9a799d71 | 1040 | * |
021230d4 AV |
1041 | * This function maps descriptor rings to the queue-specific vectors |
1042 | * we were allotted through the MSI-X enabling code. Ideally, we'd have | |
1043 | * one vector per ring/queue, but on a constrained vector budget, we | |
1044 | * group the rings as "efficiently" as possible. You would add new | |
1045 | * mapping configurations in here. | |
9a799d71 | 1046 | **/ |
021230d4 AV |
1047 | static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter, |
1048 | int vectors) | |
1049 | { | |
1050 | int v_start = 0; | |
1051 | int rxr_idx = 0, txr_idx = 0; | |
1052 | int rxr_remaining = adapter->num_rx_queues; | |
1053 | int txr_remaining = adapter->num_tx_queues; | |
1054 | int i, j; | |
1055 | int rqpv, tqpv; | |
1056 | int err = 0; | |
1057 | ||
1058 | /* No mapping required if MSI-X is disabled. */ | |
1059 | if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) | |
1060 | goto out; | |
9a799d71 | 1061 | |
021230d4 AV |
1062 | /* |
1063 | * The ideal configuration... | |
1064 | * We have enough vectors to map one per queue. | |
1065 | */ | |
1066 | if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) { | |
1067 | for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++) | |
1068 | map_vector_to_rxq(adapter, v_start, rxr_idx); | |
9a799d71 | 1069 | |
021230d4 AV |
1070 | for (; txr_idx < txr_remaining; v_start++, txr_idx++) |
1071 | map_vector_to_txq(adapter, v_start, txr_idx); | |
9a799d71 | 1072 | |
9a799d71 | 1073 | goto out; |
021230d4 | 1074 | } |
9a799d71 | 1075 | |
021230d4 AV |
1076 | /* |
1077 | * If we don't have enough vectors for a 1-to-1 | |
1078 | * mapping, we'll have to group them so there are | |
1079 | * multiple queues per vector. | |
1080 | */ | |
1081 | /* Re-adjusting *qpv takes care of the remainder. */ | |
1082 | for (i = v_start; i < vectors; i++) { | |
1083 | rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i); | |
1084 | for (j = 0; j < rqpv; j++) { | |
1085 | map_vector_to_rxq(adapter, i, rxr_idx); | |
1086 | rxr_idx++; | |
1087 | rxr_remaining--; | |
1088 | } | |
1089 | } | |
1090 | for (i = v_start; i < vectors; i++) { | |
1091 | tqpv = DIV_ROUND_UP(txr_remaining, vectors - i); | |
1092 | for (j = 0; j < tqpv; j++) { | |
1093 | map_vector_to_txq(adapter, i, txr_idx); | |
1094 | txr_idx++; | |
1095 | txr_remaining--; | |
9a799d71 | 1096 | } |
9a799d71 AK |
1097 | } |
1098 | ||
021230d4 AV |
1099 | out: |
1100 | return err; | |
1101 | } | |
1102 | ||
1103 | /** | |
1104 | * ixgbe_request_msix_irqs - Initialize MSI-X interrupts | |
1105 | * @adapter: board private structure | |
1106 | * | |
1107 | * ixgbe_request_msix_irqs allocates MSI-X vectors and requests | |
1108 | * interrupts from the kernel. | |
1109 | **/ | |
1110 | static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter) | |
1111 | { | |
1112 | struct net_device *netdev = adapter->netdev; | |
1113 | irqreturn_t (*handler)(int, void *); | |
1114 | int i, vector, q_vectors, err; | |
1115 | ||
1116 | /* Decrement for Other and TCP Timer vectors */ | |
1117 | q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; | |
1118 | ||
1119 | /* Map the Tx/Rx rings to the vectors we were allotted. */ | |
1120 | err = ixgbe_map_rings_to_vectors(adapter, q_vectors); | |
1121 | if (err) | |
1122 | goto out; | |
1123 | ||
1124 | #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \ | |
1125 | (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \ | |
1126 | &ixgbe_msix_clean_many) | |
1127 | for (vector = 0; vector < q_vectors; vector++) { | |
1128 | handler = SET_HANDLER(&adapter->q_vector[vector]); | |
1129 | sprintf(adapter->name[vector], "%s:v%d-%s", | |
1130 | netdev->name, vector, | |
1131 | (handler == &ixgbe_msix_clean_rx) ? "Rx" : | |
1132 | ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx")); | |
1133 | err = request_irq(adapter->msix_entries[vector].vector, | |
1134 | handler, 0, adapter->name[vector], | |
1135 | &(adapter->q_vector[vector])); | |
9a799d71 AK |
1136 | if (err) { |
1137 | DPRINTK(PROBE, ERR, | |
1138 | "request_irq failed for MSIX interrupt " | |
1139 | "Error: %d\n", err); | |
021230d4 | 1140 | goto free_queue_irqs; |
9a799d71 | 1141 | } |
9a799d71 AK |
1142 | } |
1143 | ||
021230d4 AV |
1144 | sprintf(adapter->name[vector], "%s:lsc", netdev->name); |
1145 | err = request_irq(adapter->msix_entries[vector].vector, | |
1146 | &ixgbe_msix_lsc, 0, adapter->name[vector], netdev); | |
9a799d71 AK |
1147 | if (err) { |
1148 | DPRINTK(PROBE, ERR, | |
1149 | "request_irq for msix_lsc failed: %d\n", err); | |
021230d4 | 1150 | goto free_queue_irqs; |
9a799d71 AK |
1151 | } |
1152 | ||
9a799d71 AK |
1153 | return 0; |
1154 | ||
021230d4 AV |
1155 | free_queue_irqs: |
1156 | for (i = vector - 1; i >= 0; i--) | |
1157 | free_irq(adapter->msix_entries[--vector].vector, | |
1158 | &(adapter->q_vector[i])); | |
1159 | adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; | |
1160 | pci_disable_msix(adapter->pdev); | |
9a799d71 AK |
1161 | kfree(adapter->msix_entries); |
1162 | adapter->msix_entries = NULL; | |
021230d4 | 1163 | out: |
9a799d71 AK |
1164 | return err; |
1165 | } | |
1166 | ||
f494e8fa AV |
1167 | static void ixgbe_set_itr(struct ixgbe_adapter *adapter) |
1168 | { | |
1169 | struct ixgbe_hw *hw = &adapter->hw; | |
1170 | struct ixgbe_q_vector *q_vector = adapter->q_vector; | |
1171 | u8 current_itr; | |
1172 | u32 new_itr = q_vector->eitr; | |
1173 | struct ixgbe_ring *rx_ring = &adapter->rx_ring[0]; | |
1174 | struct ixgbe_ring *tx_ring = &adapter->tx_ring[0]; | |
1175 | ||
1176 | q_vector->tx_eitr = ixgbe_update_itr(adapter, new_itr, | |
1177 | q_vector->tx_eitr, | |
1178 | tx_ring->total_packets, | |
1179 | tx_ring->total_bytes); | |
1180 | q_vector->rx_eitr = ixgbe_update_itr(adapter, new_itr, | |
1181 | q_vector->rx_eitr, | |
1182 | rx_ring->total_packets, | |
1183 | rx_ring->total_bytes); | |
1184 | ||
1185 | current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr); | |
1186 | ||
1187 | switch (current_itr) { | |
1188 | /* counts and packets in update_itr are dependent on these numbers */ | |
1189 | case lowest_latency: | |
1190 | new_itr = 100000; | |
1191 | break; | |
1192 | case low_latency: | |
1193 | new_itr = 20000; /* aka hwitr = ~200 */ | |
1194 | break; | |
1195 | case bulk_latency: | |
1196 | new_itr = 8000; | |
1197 | break; | |
1198 | default: | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | if (new_itr != q_vector->eitr) { | |
1203 | u32 itr_reg; | |
1204 | /* do an exponential smoothing */ | |
1205 | new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100); | |
1206 | q_vector->eitr = new_itr; | |
1207 | itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr); | |
1208 | /* must write high and low 16 bits to reset counter */ | |
1209 | IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16); | |
1210 | } | |
1211 | ||
1212 | return; | |
1213 | } | |
1214 | ||
021230d4 AV |
1215 | static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter); |
1216 | ||
9a799d71 | 1217 | /** |
021230d4 | 1218 | * ixgbe_intr - legacy mode Interrupt Handler |
9a799d71 AK |
1219 | * @irq: interrupt number |
1220 | * @data: pointer to a network interface device structure | |
1221 | * @pt_regs: CPU registers structure | |
1222 | **/ | |
1223 | static irqreturn_t ixgbe_intr(int irq, void *data) | |
1224 | { | |
1225 | struct net_device *netdev = data; | |
1226 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
1227 | struct ixgbe_hw *hw = &adapter->hw; | |
1228 | u32 eicr; | |
1229 | ||
9a799d71 | 1230 | |
021230d4 AV |
1231 | /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read |
1232 | * therefore no explict interrupt disable is necessary */ | |
1233 | eicr = IXGBE_READ_REG(hw, IXGBE_EICR); | |
9a799d71 AK |
1234 | if (!eicr) |
1235 | return IRQ_NONE; /* Not our interrupt */ | |
1236 | ||
1237 | if (eicr & IXGBE_EICR_LSC) { | |
1238 | adapter->lsc_int++; | |
1239 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) | |
1240 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1241 | } | |
021230d4 AV |
1242 | |
1243 | ||
1244 | if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) { | |
f494e8fa AV |
1245 | adapter->tx_ring[0].total_packets = 0; |
1246 | adapter->tx_ring[0].total_bytes = 0; | |
1247 | adapter->rx_ring[0].total_packets = 0; | |
1248 | adapter->rx_ring[0].total_bytes = 0; | |
021230d4 AV |
1249 | /* would disable interrupts here but EIAM disabled it */ |
1250 | __netif_rx_schedule(netdev, &adapter->q_vector[0].napi); | |
9a799d71 AK |
1251 | } |
1252 | ||
1253 | return IRQ_HANDLED; | |
1254 | } | |
1255 | ||
021230d4 AV |
1256 | static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter) |
1257 | { | |
1258 | int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; | |
1259 | ||
1260 | for (i = 0; i < q_vectors; i++) { | |
1261 | struct ixgbe_q_vector *q_vector = &adapter->q_vector[i]; | |
1262 | bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES); | |
1263 | bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES); | |
1264 | q_vector->rxr_count = 0; | |
1265 | q_vector->txr_count = 0; | |
1266 | } | |
1267 | } | |
1268 | ||
9a799d71 AK |
1269 | /** |
1270 | * ixgbe_request_irq - initialize interrupts | |
1271 | * @adapter: board private structure | |
1272 | * | |
1273 | * Attempts to configure interrupts using the best available | |
1274 | * capabilities of the hardware and kernel. | |
1275 | **/ | |
021230d4 | 1276 | static int ixgbe_request_irq(struct ixgbe_adapter *adapter) |
9a799d71 AK |
1277 | { |
1278 | struct net_device *netdev = adapter->netdev; | |
021230d4 | 1279 | int err; |
9a799d71 | 1280 | |
021230d4 AV |
1281 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { |
1282 | err = ixgbe_request_msix_irqs(adapter); | |
1283 | } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { | |
1284 | err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0, | |
1285 | netdev->name, netdev); | |
1286 | } else { | |
1287 | err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED, | |
1288 | netdev->name, netdev); | |
9a799d71 AK |
1289 | } |
1290 | ||
9a799d71 AK |
1291 | if (err) |
1292 | DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err); | |
1293 | ||
9a799d71 AK |
1294 | return err; |
1295 | } | |
1296 | ||
1297 | static void ixgbe_free_irq(struct ixgbe_adapter *adapter) | |
1298 | { | |
1299 | struct net_device *netdev = adapter->netdev; | |
1300 | ||
1301 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { | |
021230d4 | 1302 | int i, q_vectors; |
9a799d71 | 1303 | |
021230d4 AV |
1304 | q_vectors = adapter->num_msix_vectors; |
1305 | ||
1306 | i = q_vectors - 1; | |
9a799d71 | 1307 | free_irq(adapter->msix_entries[i].vector, netdev); |
9a799d71 | 1308 | |
021230d4 AV |
1309 | i--; |
1310 | for (; i >= 0; i--) { | |
1311 | free_irq(adapter->msix_entries[i].vector, | |
1312 | &(adapter->q_vector[i])); | |
1313 | } | |
1314 | ||
1315 | ixgbe_reset_q_vectors(adapter); | |
1316 | } else { | |
1317 | free_irq(adapter->pdev->irq, netdev); | |
9a799d71 AK |
1318 | } |
1319 | } | |
1320 | ||
1321 | /** | |
1322 | * ixgbe_irq_disable - Mask off interrupt generation on the NIC | |
1323 | * @adapter: board private structure | |
1324 | **/ | |
1325 | static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter) | |
1326 | { | |
9a799d71 AK |
1327 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0); |
1328 | IXGBE_WRITE_FLUSH(&adapter->hw); | |
021230d4 AV |
1329 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { |
1330 | int i; | |
1331 | for (i = 0; i < adapter->num_msix_vectors; i++) | |
1332 | synchronize_irq(adapter->msix_entries[i].vector); | |
1333 | } else { | |
1334 | synchronize_irq(adapter->pdev->irq); | |
1335 | } | |
9a799d71 AK |
1336 | } |
1337 | ||
1338 | /** | |
1339 | * ixgbe_irq_enable - Enable default interrupt generation settings | |
1340 | * @adapter: board private structure | |
1341 | **/ | |
1342 | static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter) | |
1343 | { | |
021230d4 AV |
1344 | u32 mask; |
1345 | mask = IXGBE_EIMS_ENABLE_MASK; | |
1346 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask); | |
d4f80882 | 1347 | IXGBE_WRITE_FLUSH(&adapter->hw); |
9a799d71 AK |
1348 | } |
1349 | ||
1350 | /** | |
1351 | * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts | |
1352 | * | |
1353 | **/ | |
1354 | static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter) | |
1355 | { | |
9a799d71 AK |
1356 | struct ixgbe_hw *hw = &adapter->hw; |
1357 | ||
021230d4 AV |
1358 | IXGBE_WRITE_REG(hw, IXGBE_EITR(0), |
1359 | EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr)); | |
9a799d71 AK |
1360 | |
1361 | ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0); | |
021230d4 AV |
1362 | ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0); |
1363 | ||
1364 | map_vector_to_rxq(adapter, 0, 0); | |
1365 | map_vector_to_txq(adapter, 0, 0); | |
1366 | ||
1367 | DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n"); | |
9a799d71 AK |
1368 | } |
1369 | ||
1370 | /** | |
3a581073 | 1371 | * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset |
9a799d71 AK |
1372 | * @adapter: board private structure |
1373 | * | |
1374 | * Configure the Tx unit of the MAC after a reset. | |
1375 | **/ | |
1376 | static void ixgbe_configure_tx(struct ixgbe_adapter *adapter) | |
1377 | { | |
e01c31a5 | 1378 | u64 tdba, tdwba; |
9a799d71 | 1379 | struct ixgbe_hw *hw = &adapter->hw; |
021230d4 | 1380 | u32 i, j, tdlen, txctrl; |
9a799d71 AK |
1381 | |
1382 | /* Setup the HW Tx Head and Tail descriptor pointers */ | |
1383 | for (i = 0; i < adapter->num_tx_queues; i++) { | |
e01c31a5 JB |
1384 | struct ixgbe_ring *ring = &adapter->tx_ring[i]; |
1385 | j = ring->reg_idx; | |
1386 | tdba = ring->dma; | |
1387 | tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc); | |
021230d4 | 1388 | IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j), |
e01c31a5 | 1389 | (tdba & DMA_32BIT_MASK)); |
021230d4 | 1390 | IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32)); |
e01c31a5 JB |
1391 | tdwba = ring->dma + |
1392 | (ring->count * sizeof(union ixgbe_adv_tx_desc)); | |
1393 | tdwba |= IXGBE_TDWBAL_HEAD_WB_ENABLE; | |
1394 | IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(j), tdwba & DMA_32BIT_MASK); | |
1395 | IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(j), (tdwba >> 32)); | |
021230d4 AV |
1396 | IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen); |
1397 | IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0); | |
1398 | IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0); | |
1399 | adapter->tx_ring[i].head = IXGBE_TDH(j); | |
1400 | adapter->tx_ring[i].tail = IXGBE_TDT(j); | |
1401 | /* Disable Tx Head Writeback RO bit, since this hoses | |
1402 | * bookkeeping if things aren't delivered in order. | |
1403 | */ | |
e01c31a5 | 1404 | txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j)); |
021230d4 | 1405 | txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN; |
e01c31a5 | 1406 | IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl); |
9a799d71 | 1407 | } |
9a799d71 AK |
1408 | } |
1409 | ||
1410 | #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \ | |
1411 | (((S) & (PAGE_SIZE - 1)) ? 1 : 0)) | |
1412 | ||
1413 | #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2 | |
177db6ff MC |
1414 | /** |
1415 | * ixgbe_get_skb_hdr - helper function for LRO header processing | |
1416 | * @skb: pointer to sk_buff to be added to LRO packet | |
1417 | * @iphdr: pointer to tcp header structure | |
1418 | * @tcph: pointer to tcp header structure | |
1419 | * @hdr_flags: pointer to header flags | |
1420 | * @priv: private data | |
1421 | **/ | |
1422 | static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph, | |
1423 | u64 *hdr_flags, void *priv) | |
1424 | { | |
1425 | union ixgbe_adv_rx_desc *rx_desc = priv; | |
1426 | ||
1427 | /* Verify that this is a valid IPv4 TCP packet */ | |
7c6e0a43 | 1428 | if (!(ixgbe_get_pkt_info(rx_desc) & |
177db6ff MC |
1429 | (IXGBE_RXDADV_PKTTYPE_IPV4 | IXGBE_RXDADV_PKTTYPE_TCP))) |
1430 | return -1; | |
1431 | ||
1432 | /* Set network headers */ | |
1433 | skb_reset_network_header(skb); | |
1434 | skb_set_transport_header(skb, ip_hdrlen(skb)); | |
1435 | *iphdr = ip_hdr(skb); | |
1436 | *tcph = tcp_hdr(skb); | |
1437 | *hdr_flags = LRO_IPV4 | LRO_TCP; | |
1438 | return 0; | |
1439 | } | |
1440 | ||
9a799d71 | 1441 | /** |
3a581073 | 1442 | * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset |
9a799d71 AK |
1443 | * @adapter: board private structure |
1444 | * | |
1445 | * Configure the Rx unit of the MAC after a reset. | |
1446 | **/ | |
1447 | static void ixgbe_configure_rx(struct ixgbe_adapter *adapter) | |
1448 | { | |
1449 | u64 rdba; | |
1450 | struct ixgbe_hw *hw = &adapter->hw; | |
1451 | struct net_device *netdev = adapter->netdev; | |
1452 | int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; | |
021230d4 | 1453 | int i, j; |
9a799d71 | 1454 | u32 rdlen, rxctrl, rxcsum; |
7c6e0a43 JB |
1455 | static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D, |
1456 | 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE, | |
1457 | 0x6A3E67EA, 0x14364D17, 0x3BED200D}; | |
9a799d71 | 1458 | u32 fctrl, hlreg0; |
9a799d71 | 1459 | u32 pages; |
021230d4 | 1460 | u32 reta = 0, mrqc, srrctl; |
7c6e0a43 | 1461 | int rx_buf_len; |
9a799d71 AK |
1462 | |
1463 | /* Decide whether to use packet split mode or not */ | |
1464 | if (netdev->mtu > ETH_DATA_LEN) | |
1465 | adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED; | |
1466 | else | |
1467 | adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED; | |
1468 | ||
1469 | /* Set the RX buffer length according to the mode */ | |
1470 | if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { | |
7c6e0a43 | 1471 | rx_buf_len = IXGBE_RX_HDR_SIZE; |
9a799d71 AK |
1472 | } else { |
1473 | if (netdev->mtu <= ETH_DATA_LEN) | |
7c6e0a43 | 1474 | rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
9a799d71 | 1475 | else |
7c6e0a43 | 1476 | rx_buf_len = ALIGN(max_frame, 1024); |
9a799d71 AK |
1477 | } |
1478 | ||
1479 | fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL); | |
1480 | fctrl |= IXGBE_FCTRL_BAM; | |
021230d4 | 1481 | fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */ |
9a799d71 AK |
1482 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl); |
1483 | ||
1484 | hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0); | |
1485 | if (adapter->netdev->mtu <= ETH_DATA_LEN) | |
1486 | hlreg0 &= ~IXGBE_HLREG0_JUMBOEN; | |
1487 | else | |
1488 | hlreg0 |= IXGBE_HLREG0_JUMBOEN; | |
1489 | IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0); | |
1490 | ||
1491 | pages = PAGE_USE_COUNT(adapter->netdev->mtu); | |
1492 | ||
1493 | srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0)); | |
1494 | srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK; | |
1495 | srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK; | |
1496 | ||
1497 | if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) { | |
1498 | srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; | |
1499 | srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS; | |
1500 | srrctl |= ((IXGBE_RX_HDR_SIZE << | |
1501 | IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) & | |
1502 | IXGBE_SRRCTL_BSIZEHDR_MASK); | |
1503 | } else { | |
1504 | srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF; | |
1505 | ||
7c6e0a43 | 1506 | if (rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE) |
9a799d71 AK |
1507 | srrctl |= |
1508 | IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; | |
1509 | else | |
7c6e0a43 | 1510 | srrctl |= rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT; |
9a799d71 AK |
1511 | } |
1512 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl); | |
1513 | ||
1514 | rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc); | |
1515 | /* disable receives while setting up the descriptors */ | |
1516 | rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); | |
1517 | IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN); | |
1518 | ||
1519 | /* Setup the HW Rx Head and Tail Descriptor Pointers and | |
1520 | * the Base and Length of the Rx Descriptor Ring */ | |
1521 | for (i = 0; i < adapter->num_rx_queues; i++) { | |
1522 | rdba = adapter->rx_ring[i].dma; | |
7c6e0a43 JB |
1523 | j = adapter->rx_ring[i].reg_idx; |
1524 | IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_32BIT_MASK)); | |
1525 | IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32)); | |
1526 | IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen); | |
1527 | IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0); | |
1528 | IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0); | |
1529 | adapter->rx_ring[i].head = IXGBE_RDH(j); | |
1530 | adapter->rx_ring[i].tail = IXGBE_RDT(j); | |
1531 | adapter->rx_ring[i].rx_buf_len = rx_buf_len; | |
9a799d71 AK |
1532 | } |
1533 | ||
177db6ff MC |
1534 | /* Intitial LRO Settings */ |
1535 | adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE; | |
1536 | adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS; | |
1537 | adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr; | |
1538 | adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID; | |
1539 | if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) | |
1540 | adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI; | |
1541 | adapter->rx_ring[i].lro_mgr.dev = adapter->netdev; | |
1542 | adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; | |
1543 | adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; | |
1544 | ||
021230d4 | 1545 | if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) { |
9a799d71 | 1546 | /* Fill out redirection table */ |
021230d4 AV |
1547 | for (i = 0, j = 0; i < 128; i++, j++) { |
1548 | if (j == adapter->ring_feature[RING_F_RSS].indices) | |
1549 | j = 0; | |
1550 | /* reta = 4-byte sliding window of | |
1551 | * 0x00..(indices-1)(indices-1)00..etc. */ | |
1552 | reta = (reta << 8) | (j * 0x11); | |
1553 | if ((i & 3) == 3) | |
1554 | IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta); | |
9a799d71 AK |
1555 | } |
1556 | ||
1557 | /* Fill out hash function seeds */ | |
1558 | for (i = 0; i < 10; i++) | |
7c6e0a43 | 1559 | IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]); |
9a799d71 AK |
1560 | |
1561 | mrqc = IXGBE_MRQC_RSSEN | |
1562 | /* Perform hash on these packet types */ | |
7c6e0a43 JB |
1563 | | IXGBE_MRQC_RSS_FIELD_IPV4 |
1564 | | IXGBE_MRQC_RSS_FIELD_IPV4_TCP | |
1565 | | IXGBE_MRQC_RSS_FIELD_IPV4_UDP | |
1566 | | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP | |
1567 | | IXGBE_MRQC_RSS_FIELD_IPV6_EX | |
1568 | | IXGBE_MRQC_RSS_FIELD_IPV6 | |
1569 | | IXGBE_MRQC_RSS_FIELD_IPV6_TCP | |
1570 | | IXGBE_MRQC_RSS_FIELD_IPV6_UDP | |
1571 | | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP; | |
9a799d71 | 1572 | IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc); |
021230d4 | 1573 | } |
9a799d71 | 1574 | |
021230d4 AV |
1575 | rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM); |
1576 | ||
1577 | if (adapter->flags & IXGBE_FLAG_RSS_ENABLED || | |
1578 | adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) { | |
1579 | /* Disable indicating checksum in descriptor, enables | |
1580 | * RSS hash */ | |
9a799d71 | 1581 | rxcsum |= IXGBE_RXCSUM_PCSD; |
9a799d71 | 1582 | } |
021230d4 AV |
1583 | if (!(rxcsum & IXGBE_RXCSUM_PCSD)) { |
1584 | /* Enable IPv4 payload checksum for UDP fragments | |
1585 | * if PCSD is not set */ | |
1586 | rxcsum |= IXGBE_RXCSUM_IPPCSE; | |
1587 | } | |
1588 | ||
1589 | IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum); | |
9a799d71 AK |
1590 | } |
1591 | ||
1592 | static void ixgbe_vlan_rx_register(struct net_device *netdev, | |
1593 | struct vlan_group *grp) | |
1594 | { | |
1595 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
1596 | u32 ctrl; | |
1597 | ||
d4f80882 AV |
1598 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) |
1599 | ixgbe_irq_disable(adapter); | |
9a799d71 AK |
1600 | adapter->vlgrp = grp; |
1601 | ||
1602 | if (grp) { | |
1603 | /* enable VLAN tag insert/strip */ | |
1604 | ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL); | |
746b9f02 | 1605 | ctrl |= IXGBE_VLNCTRL_VME; |
9a799d71 AK |
1606 | ctrl &= ~IXGBE_VLNCTRL_CFIEN; |
1607 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl); | |
1608 | } | |
1609 | ||
d4f80882 AV |
1610 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) |
1611 | ixgbe_irq_enable(adapter); | |
9a799d71 AK |
1612 | } |
1613 | ||
1614 | static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid) | |
1615 | { | |
1616 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
1617 | ||
1618 | /* add VID to filter table */ | |
1619 | ixgbe_set_vfta(&adapter->hw, vid, 0, true); | |
1620 | } | |
1621 | ||
1622 | static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) | |
1623 | { | |
1624 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
1625 | ||
d4f80882 AV |
1626 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) |
1627 | ixgbe_irq_disable(adapter); | |
1628 | ||
9a799d71 | 1629 | vlan_group_set_device(adapter->vlgrp, vid, NULL); |
d4f80882 AV |
1630 | |
1631 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) | |
1632 | ixgbe_irq_enable(adapter); | |
9a799d71 AK |
1633 | |
1634 | /* remove VID from filter table */ | |
1635 | ixgbe_set_vfta(&adapter->hw, vid, 0, false); | |
1636 | } | |
1637 | ||
1638 | static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter) | |
1639 | { | |
1640 | ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp); | |
1641 | ||
1642 | if (adapter->vlgrp) { | |
1643 | u16 vid; | |
1644 | for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { | |
1645 | if (!vlan_group_get_device(adapter->vlgrp, vid)) | |
1646 | continue; | |
1647 | ixgbe_vlan_rx_add_vid(adapter->netdev, vid); | |
1648 | } | |
1649 | } | |
1650 | } | |
1651 | ||
2c5645cf CL |
1652 | static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq) |
1653 | { | |
1654 | struct dev_mc_list *mc_ptr; | |
1655 | u8 *addr = *mc_addr_ptr; | |
1656 | *vmdq = 0; | |
1657 | ||
1658 | mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]); | |
1659 | if (mc_ptr->next) | |
1660 | *mc_addr_ptr = mc_ptr->next->dmi_addr; | |
1661 | else | |
1662 | *mc_addr_ptr = NULL; | |
1663 | ||
1664 | return addr; | |
1665 | } | |
1666 | ||
9a799d71 | 1667 | /** |
2c5645cf | 1668 | * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set |
9a799d71 AK |
1669 | * @netdev: network interface device structure |
1670 | * | |
2c5645cf CL |
1671 | * The set_rx_method entry point is called whenever the unicast/multicast |
1672 | * address list or the network interface flags are updated. This routine is | |
1673 | * responsible for configuring the hardware for proper unicast, multicast and | |
1674 | * promiscuous mode. | |
9a799d71 | 1675 | **/ |
2c5645cf | 1676 | static void ixgbe_set_rx_mode(struct net_device *netdev) |
9a799d71 AK |
1677 | { |
1678 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
1679 | struct ixgbe_hw *hw = &adapter->hw; | |
3d01625a | 1680 | u32 fctrl, vlnctrl; |
2c5645cf CL |
1681 | u8 *addr_list = NULL; |
1682 | int addr_count = 0; | |
9a799d71 AK |
1683 | |
1684 | /* Check for Promiscuous and All Multicast modes */ | |
1685 | ||
1686 | fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL); | |
3d01625a | 1687 | vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL); |
9a799d71 AK |
1688 | |
1689 | if (netdev->flags & IFF_PROMISC) { | |
2c5645cf | 1690 | hw->addr_ctrl.user_set_promisc = 1; |
9a799d71 | 1691 | fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); |
3d01625a | 1692 | vlnctrl &= ~IXGBE_VLNCTRL_VFE; |
9a799d71 | 1693 | } else { |
746b9f02 PM |
1694 | if (netdev->flags & IFF_ALLMULTI) { |
1695 | fctrl |= IXGBE_FCTRL_MPE; | |
1696 | fctrl &= ~IXGBE_FCTRL_UPE; | |
1697 | } else { | |
1698 | fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE); | |
1699 | } | |
3d01625a | 1700 | vlnctrl |= IXGBE_VLNCTRL_VFE; |
2c5645cf | 1701 | hw->addr_ctrl.user_set_promisc = 0; |
9a799d71 AK |
1702 | } |
1703 | ||
1704 | IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl); | |
3d01625a | 1705 | IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl); |
9a799d71 | 1706 | |
2c5645cf CL |
1707 | /* reprogram secondary unicast list */ |
1708 | addr_count = netdev->uc_count; | |
1709 | if (addr_count) | |
1710 | addr_list = netdev->uc_list->dmi_addr; | |
1711 | ixgbe_update_uc_addr_list(hw, addr_list, addr_count, | |
1712 | ixgbe_addr_list_itr); | |
9a799d71 | 1713 | |
2c5645cf CL |
1714 | /* reprogram multicast list */ |
1715 | addr_count = netdev->mc_count; | |
1716 | if (addr_count) | |
1717 | addr_list = netdev->mc_list->dmi_addr; | |
1718 | ixgbe_update_mc_addr_list(hw, addr_list, addr_count, | |
1719 | ixgbe_addr_list_itr); | |
9a799d71 AK |
1720 | } |
1721 | ||
021230d4 AV |
1722 | static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter) |
1723 | { | |
1724 | int q_idx; | |
1725 | struct ixgbe_q_vector *q_vector; | |
1726 | int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; | |
1727 | ||
1728 | /* legacy and MSI only use one vector */ | |
1729 | if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) | |
1730 | q_vectors = 1; | |
1731 | ||
1732 | for (q_idx = 0; q_idx < q_vectors; q_idx++) { | |
1733 | q_vector = &adapter->q_vector[q_idx]; | |
1734 | if (!q_vector->rxr_count) | |
1735 | continue; | |
1736 | napi_enable(&q_vector->napi); | |
1737 | } | |
1738 | } | |
1739 | ||
1740 | static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter) | |
1741 | { | |
1742 | int q_idx; | |
1743 | struct ixgbe_q_vector *q_vector; | |
1744 | int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; | |
1745 | ||
1746 | /* legacy and MSI only use one vector */ | |
1747 | if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) | |
1748 | q_vectors = 1; | |
1749 | ||
1750 | for (q_idx = 0; q_idx < q_vectors; q_idx++) { | |
1751 | q_vector = &adapter->q_vector[q_idx]; | |
1752 | if (!q_vector->rxr_count) | |
1753 | continue; | |
1754 | napi_disable(&q_vector->napi); | |
1755 | } | |
1756 | } | |
1757 | ||
9a799d71 AK |
1758 | static void ixgbe_configure(struct ixgbe_adapter *adapter) |
1759 | { | |
1760 | struct net_device *netdev = adapter->netdev; | |
1761 | int i; | |
1762 | ||
2c5645cf | 1763 | ixgbe_set_rx_mode(netdev); |
9a799d71 AK |
1764 | |
1765 | ixgbe_restore_vlan(adapter); | |
1766 | ||
1767 | ixgbe_configure_tx(adapter); | |
1768 | ixgbe_configure_rx(adapter); | |
1769 | for (i = 0; i < adapter->num_rx_queues; i++) | |
1770 | ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i], | |
1771 | (adapter->rx_ring[i].count - 1)); | |
1772 | } | |
1773 | ||
1774 | static int ixgbe_up_complete(struct ixgbe_adapter *adapter) | |
1775 | { | |
1776 | struct net_device *netdev = adapter->netdev; | |
9a799d71 | 1777 | struct ixgbe_hw *hw = &adapter->hw; |
021230d4 | 1778 | int i, j = 0; |
9a799d71 | 1779 | int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN; |
021230d4 AV |
1780 | u32 txdctl, rxdctl, mhadd; |
1781 | u32 gpie; | |
9a799d71 | 1782 | |
5eba3699 AV |
1783 | ixgbe_get_hw_control(adapter); |
1784 | ||
021230d4 AV |
1785 | if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) || |
1786 | (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) { | |
9a799d71 AK |
1787 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { |
1788 | gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME | | |
1789 | IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD); | |
1790 | } else { | |
1791 | /* MSI only */ | |
021230d4 | 1792 | gpie = 0; |
9a799d71 | 1793 | } |
021230d4 AV |
1794 | /* XXX: to interrupt immediately for EICS writes, enable this */ |
1795 | /* gpie |= IXGBE_GPIE_EIMEN; */ | |
1796 | IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie); | |
9a799d71 AK |
1797 | } |
1798 | ||
021230d4 AV |
1799 | if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) { |
1800 | /* legacy interrupts, use EIAM to auto-mask when reading EICR, | |
1801 | * specifically only auto mask tx and rx interrupts */ | |
1802 | IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE); | |
1803 | } | |
9a799d71 | 1804 | |
021230d4 | 1805 | mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD); |
9a799d71 AK |
1806 | if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) { |
1807 | mhadd &= ~IXGBE_MHADD_MFS_MASK; | |
1808 | mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT; | |
1809 | ||
1810 | IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd); | |
1811 | } | |
1812 | ||
1813 | for (i = 0; i < adapter->num_tx_queues; i++) { | |
021230d4 AV |
1814 | j = adapter->tx_ring[i].reg_idx; |
1815 | txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j)); | |
e01c31a5 JB |
1816 | /* enable WTHRESH=8 descriptors, to encourage burst writeback */ |
1817 | txdctl |= (8 << 16); | |
9a799d71 | 1818 | txdctl |= IXGBE_TXDCTL_ENABLE; |
021230d4 | 1819 | IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl); |
9a799d71 AK |
1820 | } |
1821 | ||
1822 | for (i = 0; i < adapter->num_rx_queues; i++) { | |
021230d4 AV |
1823 | j = adapter->rx_ring[i].reg_idx; |
1824 | rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j)); | |
1825 | /* enable PTHRESH=32 descriptors (half the internal cache) | |
1826 | * and HTHRESH=0 descriptors (to minimize latency on fetch), | |
1827 | * this also removes a pesky rx_no_buffer_count increment */ | |
1828 | rxdctl |= 0x0020; | |
9a799d71 | 1829 | rxdctl |= IXGBE_RXDCTL_ENABLE; |
021230d4 | 1830 | IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl); |
9a799d71 AK |
1831 | } |
1832 | /* enable all receives */ | |
1833 | rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL); | |
1834 | rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN); | |
1835 | IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl); | |
1836 | ||
1837 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) | |
1838 | ixgbe_configure_msix(adapter); | |
1839 | else | |
1840 | ixgbe_configure_msi_and_legacy(adapter); | |
1841 | ||
1842 | clear_bit(__IXGBE_DOWN, &adapter->state); | |
021230d4 AV |
1843 | ixgbe_napi_enable_all(adapter); |
1844 | ||
1845 | /* clear any pending interrupts, may auto mask */ | |
1846 | IXGBE_READ_REG(hw, IXGBE_EICR); | |
1847 | ||
9a799d71 AK |
1848 | ixgbe_irq_enable(adapter); |
1849 | ||
1850 | /* bring the link up in the watchdog, this could race with our first | |
1851 | * link up interrupt but shouldn't be a problem */ | |
1852 | mod_timer(&adapter->watchdog_timer, jiffies); | |
1853 | return 0; | |
1854 | } | |
1855 | ||
d4f80882 AV |
1856 | void ixgbe_reinit_locked(struct ixgbe_adapter *adapter) |
1857 | { | |
1858 | WARN_ON(in_interrupt()); | |
1859 | while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state)) | |
1860 | msleep(1); | |
1861 | ixgbe_down(adapter); | |
1862 | ixgbe_up(adapter); | |
1863 | clear_bit(__IXGBE_RESETTING, &adapter->state); | |
1864 | } | |
1865 | ||
9a799d71 AK |
1866 | int ixgbe_up(struct ixgbe_adapter *adapter) |
1867 | { | |
1868 | /* hardware has been reset, we need to reload some things */ | |
1869 | ixgbe_configure(adapter); | |
1870 | ||
1871 | return ixgbe_up_complete(adapter); | |
1872 | } | |
1873 | ||
1874 | void ixgbe_reset(struct ixgbe_adapter *adapter) | |
1875 | { | |
1876 | if (ixgbe_init_hw(&adapter->hw)) | |
1877 | DPRINTK(PROBE, ERR, "Hardware Error\n"); | |
1878 | ||
1879 | /* reprogram the RAR[0] in case user changed it. */ | |
1880 | ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV); | |
1881 | ||
1882 | } | |
1883 | ||
1884 | #ifdef CONFIG_PM | |
1885 | static int ixgbe_resume(struct pci_dev *pdev) | |
1886 | { | |
1887 | struct net_device *netdev = pci_get_drvdata(pdev); | |
1888 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
021230d4 | 1889 | u32 err; |
9a799d71 AK |
1890 | |
1891 | pci_set_power_state(pdev, PCI_D0); | |
1892 | pci_restore_state(pdev); | |
1893 | err = pci_enable_device(pdev); | |
1894 | if (err) { | |
1895 | printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \ | |
1896 | "suspend\n"); | |
1897 | return err; | |
1898 | } | |
1899 | pci_set_master(pdev); | |
1900 | ||
1901 | pci_enable_wake(pdev, PCI_D3hot, 0); | |
1902 | pci_enable_wake(pdev, PCI_D3cold, 0); | |
1903 | ||
1904 | if (netif_running(netdev)) { | |
021230d4 | 1905 | err = ixgbe_request_irq(adapter); |
9a799d71 AK |
1906 | if (err) |
1907 | return err; | |
1908 | } | |
1909 | ||
1910 | ixgbe_reset(adapter); | |
1911 | ||
1912 | if (netif_running(netdev)) | |
1913 | ixgbe_up(adapter); | |
1914 | ||
1915 | netif_device_attach(netdev); | |
1916 | ||
1917 | return 0; | |
1918 | } | |
1919 | #endif | |
1920 | ||
1921 | /** | |
1922 | * ixgbe_clean_rx_ring - Free Rx Buffers per Queue | |
1923 | * @adapter: board private structure | |
1924 | * @rx_ring: ring to free buffers from | |
1925 | **/ | |
1926 | static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter, | |
1927 | struct ixgbe_ring *rx_ring) | |
1928 | { | |
1929 | struct pci_dev *pdev = adapter->pdev; | |
1930 | unsigned long size; | |
1931 | unsigned int i; | |
1932 | ||
1933 | /* Free all the Rx ring sk_buffs */ | |
1934 | ||
1935 | for (i = 0; i < rx_ring->count; i++) { | |
1936 | struct ixgbe_rx_buffer *rx_buffer_info; | |
1937 | ||
1938 | rx_buffer_info = &rx_ring->rx_buffer_info[i]; | |
1939 | if (rx_buffer_info->dma) { | |
1940 | pci_unmap_single(pdev, rx_buffer_info->dma, | |
7c6e0a43 | 1941 | rx_ring->rx_buf_len, |
9a799d71 AK |
1942 | PCI_DMA_FROMDEVICE); |
1943 | rx_buffer_info->dma = 0; | |
1944 | } | |
1945 | if (rx_buffer_info->skb) { | |
1946 | dev_kfree_skb(rx_buffer_info->skb); | |
1947 | rx_buffer_info->skb = NULL; | |
1948 | } | |
1949 | if (!rx_buffer_info->page) | |
1950 | continue; | |
1951 | pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE, | |
1952 | PCI_DMA_FROMDEVICE); | |
1953 | rx_buffer_info->page_dma = 0; | |
1954 | ||
1955 | put_page(rx_buffer_info->page); | |
1956 | rx_buffer_info->page = NULL; | |
1957 | } | |
1958 | ||
1959 | size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; | |
1960 | memset(rx_ring->rx_buffer_info, 0, size); | |
1961 | ||
1962 | /* Zero out the descriptor ring */ | |
1963 | memset(rx_ring->desc, 0, rx_ring->size); | |
1964 | ||
1965 | rx_ring->next_to_clean = 0; | |
1966 | rx_ring->next_to_use = 0; | |
1967 | ||
1968 | writel(0, adapter->hw.hw_addr + rx_ring->head); | |
1969 | writel(0, adapter->hw.hw_addr + rx_ring->tail); | |
1970 | } | |
1971 | ||
1972 | /** | |
1973 | * ixgbe_clean_tx_ring - Free Tx Buffers | |
1974 | * @adapter: board private structure | |
1975 | * @tx_ring: ring to be cleaned | |
1976 | **/ | |
1977 | static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter, | |
1978 | struct ixgbe_ring *tx_ring) | |
1979 | { | |
1980 | struct ixgbe_tx_buffer *tx_buffer_info; | |
1981 | unsigned long size; | |
1982 | unsigned int i; | |
1983 | ||
1984 | /* Free all the Tx ring sk_buffs */ | |
1985 | ||
1986 | for (i = 0; i < tx_ring->count; i++) { | |
1987 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
1988 | ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info); | |
1989 | } | |
1990 | ||
1991 | size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; | |
1992 | memset(tx_ring->tx_buffer_info, 0, size); | |
1993 | ||
1994 | /* Zero out the descriptor ring */ | |
1995 | memset(tx_ring->desc, 0, tx_ring->size); | |
1996 | ||
1997 | tx_ring->next_to_use = 0; | |
1998 | tx_ring->next_to_clean = 0; | |
1999 | ||
2000 | writel(0, adapter->hw.hw_addr + tx_ring->head); | |
2001 | writel(0, adapter->hw.hw_addr + tx_ring->tail); | |
2002 | } | |
2003 | ||
2004 | /** | |
021230d4 | 2005 | * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues |
9a799d71 AK |
2006 | * @adapter: board private structure |
2007 | **/ | |
021230d4 | 2008 | static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter) |
9a799d71 AK |
2009 | { |
2010 | int i; | |
2011 | ||
021230d4 AV |
2012 | for (i = 0; i < adapter->num_rx_queues; i++) |
2013 | ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]); | |
9a799d71 AK |
2014 | } |
2015 | ||
2016 | /** | |
021230d4 | 2017 | * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues |
9a799d71 AK |
2018 | * @adapter: board private structure |
2019 | **/ | |
021230d4 | 2020 | static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter) |
9a799d71 AK |
2021 | { |
2022 | int i; | |
2023 | ||
021230d4 AV |
2024 | for (i = 0; i < adapter->num_tx_queues; i++) |
2025 | ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]); | |
9a799d71 AK |
2026 | } |
2027 | ||
2028 | void ixgbe_down(struct ixgbe_adapter *adapter) | |
2029 | { | |
2030 | struct net_device *netdev = adapter->netdev; | |
2031 | u32 rxctrl; | |
2032 | ||
2033 | /* signal that we are down to the interrupt handler */ | |
2034 | set_bit(__IXGBE_DOWN, &adapter->state); | |
2035 | ||
2036 | /* disable receives */ | |
2037 | rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL); | |
2038 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL, | |
2039 | rxctrl & ~IXGBE_RXCTRL_RXEN); | |
2040 | ||
2041 | netif_tx_disable(netdev); | |
2042 | ||
2043 | /* disable transmits in the hardware */ | |
2044 | ||
2045 | /* flush both disables */ | |
2046 | IXGBE_WRITE_FLUSH(&adapter->hw); | |
2047 | msleep(10); | |
2048 | ||
2049 | ixgbe_irq_disable(adapter); | |
2050 | ||
021230d4 | 2051 | ixgbe_napi_disable_all(adapter); |
9a799d71 AK |
2052 | del_timer_sync(&adapter->watchdog_timer); |
2053 | ||
2054 | netif_carrier_off(netdev); | |
fd2ea0a7 | 2055 | netif_tx_stop_all_queues(netdev); |
9a799d71 | 2056 | |
6f4a0e45 PL |
2057 | if (!pci_channel_offline(adapter->pdev)) |
2058 | ixgbe_reset(adapter); | |
9a799d71 AK |
2059 | ixgbe_clean_all_tx_rings(adapter); |
2060 | ixgbe_clean_all_rx_rings(adapter); | |
2061 | ||
2062 | } | |
2063 | ||
2064 | static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state) | |
2065 | { | |
2066 | struct net_device *netdev = pci_get_drvdata(pdev); | |
2067 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
2068 | #ifdef CONFIG_PM | |
2069 | int retval = 0; | |
2070 | #endif | |
2071 | ||
2072 | netif_device_detach(netdev); | |
2073 | ||
2074 | if (netif_running(netdev)) { | |
2075 | ixgbe_down(adapter); | |
2076 | ixgbe_free_irq(adapter); | |
2077 | } | |
2078 | ||
2079 | #ifdef CONFIG_PM | |
2080 | retval = pci_save_state(pdev); | |
2081 | if (retval) | |
2082 | return retval; | |
2083 | #endif | |
2084 | ||
2085 | pci_enable_wake(pdev, PCI_D3hot, 0); | |
2086 | pci_enable_wake(pdev, PCI_D3cold, 0); | |
2087 | ||
5eba3699 AV |
2088 | ixgbe_release_hw_control(adapter); |
2089 | ||
9a799d71 AK |
2090 | pci_disable_device(pdev); |
2091 | ||
2092 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
2093 | ||
2094 | return 0; | |
2095 | } | |
2096 | ||
2097 | static void ixgbe_shutdown(struct pci_dev *pdev) | |
2098 | { | |
2099 | ixgbe_suspend(pdev, PMSG_SUSPEND); | |
2100 | } | |
2101 | ||
2102 | /** | |
021230d4 AV |
2103 | * ixgbe_poll - NAPI Rx polling callback |
2104 | * @napi: structure for representing this polling device | |
2105 | * @budget: how many packets driver is allowed to clean | |
2106 | * | |
2107 | * This function is used for legacy and MSI, NAPI mode | |
9a799d71 | 2108 | **/ |
021230d4 | 2109 | static int ixgbe_poll(struct napi_struct *napi, int budget) |
9a799d71 | 2110 | { |
021230d4 AV |
2111 | struct ixgbe_q_vector *q_vector = container_of(napi, |
2112 | struct ixgbe_q_vector, napi); | |
2113 | struct ixgbe_adapter *adapter = q_vector->adapter; | |
d2c7ddd6 | 2114 | int tx_cleaned = 0, work_done = 0; |
9a799d71 | 2115 | |
bd0362dd JC |
2116 | #ifdef CONFIG_DCA |
2117 | if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { | |
2118 | ixgbe_update_tx_dca(adapter, adapter->tx_ring); | |
2119 | ixgbe_update_rx_dca(adapter, adapter->rx_ring); | |
2120 | } | |
2121 | #endif | |
2122 | ||
d2c7ddd6 | 2123 | tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring); |
021230d4 | 2124 | ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget); |
9a799d71 | 2125 | |
d2c7ddd6 DM |
2126 | if (tx_cleaned) |
2127 | work_done = budget; | |
2128 | ||
53e52c72 DM |
2129 | /* If budget not fully consumed, exit the polling mode */ |
2130 | if (work_done < budget) { | |
021230d4 | 2131 | netif_rx_complete(adapter->netdev, napi); |
f494e8fa AV |
2132 | if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS) |
2133 | ixgbe_set_itr(adapter); | |
d4f80882 AV |
2134 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) |
2135 | ixgbe_irq_enable(adapter); | |
9a799d71 AK |
2136 | } |
2137 | ||
2138 | return work_done; | |
2139 | } | |
2140 | ||
2141 | /** | |
2142 | * ixgbe_tx_timeout - Respond to a Tx Hang | |
2143 | * @netdev: network interface device structure | |
2144 | **/ | |
2145 | static void ixgbe_tx_timeout(struct net_device *netdev) | |
2146 | { | |
2147 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
2148 | ||
2149 | /* Do the reset outside of interrupt context */ | |
2150 | schedule_work(&adapter->reset_task); | |
2151 | } | |
2152 | ||
2153 | static void ixgbe_reset_task(struct work_struct *work) | |
2154 | { | |
2155 | struct ixgbe_adapter *adapter; | |
2156 | adapter = container_of(work, struct ixgbe_adapter, reset_task); | |
2157 | ||
2158 | adapter->tx_timeout_count++; | |
2159 | ||
d4f80882 | 2160 | ixgbe_reinit_locked(adapter); |
9a799d71 AK |
2161 | } |
2162 | ||
021230d4 AV |
2163 | static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter, |
2164 | int vectors) | |
2165 | { | |
2166 | int err, vector_threshold; | |
2167 | ||
2168 | /* We'll want at least 3 (vector_threshold): | |
2169 | * 1) TxQ[0] Cleanup | |
2170 | * 2) RxQ[0] Cleanup | |
2171 | * 3) Other (Link Status Change, etc.) | |
2172 | * 4) TCP Timer (optional) | |
2173 | */ | |
2174 | vector_threshold = MIN_MSIX_COUNT; | |
2175 | ||
2176 | /* The more we get, the more we will assign to Tx/Rx Cleanup | |
2177 | * for the separate queues...where Rx Cleanup >= Tx Cleanup. | |
2178 | * Right now, we simply care about how many we'll get; we'll | |
2179 | * set them up later while requesting irq's. | |
2180 | */ | |
2181 | while (vectors >= vector_threshold) { | |
2182 | err = pci_enable_msix(adapter->pdev, adapter->msix_entries, | |
2183 | vectors); | |
2184 | if (!err) /* Success in acquiring all requested vectors. */ | |
2185 | break; | |
2186 | else if (err < 0) | |
2187 | vectors = 0; /* Nasty failure, quit now */ | |
2188 | else /* err == number of vectors we should try again with */ | |
2189 | vectors = err; | |
2190 | } | |
2191 | ||
2192 | if (vectors < vector_threshold) { | |
2193 | /* Can't allocate enough MSI-X interrupts? Oh well. | |
2194 | * This just means we'll go with either a single MSI | |
2195 | * vector or fall back to legacy interrupts. | |
2196 | */ | |
2197 | DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n"); | |
2198 | adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; | |
2199 | kfree(adapter->msix_entries); | |
2200 | adapter->msix_entries = NULL; | |
2201 | adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED; | |
2202 | adapter->num_tx_queues = 1; | |
2203 | adapter->num_rx_queues = 1; | |
2204 | } else { | |
2205 | adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */ | |
2206 | adapter->num_msix_vectors = vectors; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter) | |
2211 | { | |
2212 | int nrq, ntq; | |
2213 | int feature_mask = 0, rss_i, rss_m; | |
2214 | ||
2215 | /* Number of supported queues */ | |
2216 | switch (adapter->hw.mac.type) { | |
2217 | case ixgbe_mac_82598EB: | |
2218 | rss_i = adapter->ring_feature[RING_F_RSS].indices; | |
2219 | rss_m = 0; | |
2220 | feature_mask |= IXGBE_FLAG_RSS_ENABLED; | |
2221 | ||
2222 | switch (adapter->flags & feature_mask) { | |
2223 | case (IXGBE_FLAG_RSS_ENABLED): | |
2224 | rss_m = 0xF; | |
2225 | nrq = rss_i; | |
30eba97a | 2226 | ntq = rss_i; |
021230d4 AV |
2227 | break; |
2228 | case 0: | |
2229 | default: | |
2230 | rss_i = 0; | |
2231 | rss_m = 0; | |
2232 | nrq = 1; | |
2233 | ntq = 1; | |
2234 | break; | |
2235 | } | |
2236 | ||
2237 | adapter->ring_feature[RING_F_RSS].indices = rss_i; | |
2238 | adapter->ring_feature[RING_F_RSS].mask = rss_m; | |
2239 | break; | |
2240 | default: | |
2241 | nrq = 1; | |
2242 | ntq = 1; | |
2243 | break; | |
2244 | } | |
2245 | ||
2246 | adapter->num_rx_queues = nrq; | |
2247 | adapter->num_tx_queues = ntq; | |
2248 | } | |
2249 | ||
2250 | /** | |
2251 | * ixgbe_cache_ring_register - Descriptor ring to register mapping | |
2252 | * @adapter: board private structure to initialize | |
2253 | * | |
2254 | * Once we know the feature-set enabled for the device, we'll cache | |
2255 | * the register offset the descriptor ring is assigned to. | |
2256 | **/ | |
2257 | static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter) | |
2258 | { | |
2259 | /* TODO: Remove all uses of the indices in the cases where multiple | |
2260 | * features are OR'd together, if the feature set makes sense. | |
2261 | */ | |
2262 | int feature_mask = 0, rss_i; | |
2263 | int i, txr_idx, rxr_idx; | |
2264 | ||
2265 | /* Number of supported queues */ | |
2266 | switch (adapter->hw.mac.type) { | |
2267 | case ixgbe_mac_82598EB: | |
2268 | rss_i = adapter->ring_feature[RING_F_RSS].indices; | |
2269 | txr_idx = 0; | |
2270 | rxr_idx = 0; | |
2271 | feature_mask |= IXGBE_FLAG_RSS_ENABLED; | |
2272 | switch (adapter->flags & feature_mask) { | |
2273 | case (IXGBE_FLAG_RSS_ENABLED): | |
2274 | for (i = 0; i < adapter->num_rx_queues; i++) | |
2275 | adapter->rx_ring[i].reg_idx = i; | |
2276 | for (i = 0; i < adapter->num_tx_queues; i++) | |
2277 | adapter->tx_ring[i].reg_idx = i; | |
2278 | break; | |
2279 | case 0: | |
2280 | default: | |
2281 | break; | |
2282 | } | |
2283 | break; | |
2284 | default: | |
2285 | break; | |
2286 | } | |
2287 | } | |
2288 | ||
9a799d71 AK |
2289 | /** |
2290 | * ixgbe_alloc_queues - Allocate memory for all rings | |
2291 | * @adapter: board private structure to initialize | |
2292 | * | |
2293 | * We allocate one ring per queue at run-time since we don't know the | |
2294 | * number of queues at compile-time. The polling_netdev array is | |
2295 | * intended for Multiqueue, but should work fine with a single queue. | |
2296 | **/ | |
2297 | static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter) | |
2298 | { | |
2299 | int i; | |
2300 | ||
2301 | adapter->tx_ring = kcalloc(adapter->num_tx_queues, | |
2302 | sizeof(struct ixgbe_ring), GFP_KERNEL); | |
2303 | if (!adapter->tx_ring) | |
021230d4 | 2304 | goto err_tx_ring_allocation; |
9a799d71 AK |
2305 | |
2306 | adapter->rx_ring = kcalloc(adapter->num_rx_queues, | |
2307 | sizeof(struct ixgbe_ring), GFP_KERNEL); | |
021230d4 AV |
2308 | if (!adapter->rx_ring) |
2309 | goto err_rx_ring_allocation; | |
9a799d71 | 2310 | |
021230d4 AV |
2311 | for (i = 0; i < adapter->num_tx_queues; i++) { |
2312 | adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD; | |
2313 | adapter->tx_ring[i].queue_index = i; | |
2314 | } | |
9a799d71 | 2315 | for (i = 0; i < adapter->num_rx_queues; i++) { |
9a799d71 | 2316 | adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD; |
021230d4 AV |
2317 | adapter->rx_ring[i].queue_index = i; |
2318 | } | |
2319 | ||
2320 | ixgbe_cache_ring_register(adapter); | |
2321 | ||
2322 | return 0; | |
2323 | ||
2324 | err_rx_ring_allocation: | |
2325 | kfree(adapter->tx_ring); | |
2326 | err_tx_ring_allocation: | |
2327 | return -ENOMEM; | |
2328 | } | |
2329 | ||
2330 | /** | |
2331 | * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported | |
2332 | * @adapter: board private structure to initialize | |
2333 | * | |
2334 | * Attempt to configure the interrupts using the best available | |
2335 | * capabilities of the hardware and the kernel. | |
2336 | **/ | |
2337 | static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter | |
2338 | *adapter) | |
2339 | { | |
2340 | int err = 0; | |
2341 | int vector, v_budget; | |
2342 | ||
2343 | /* | |
2344 | * It's easy to be greedy for MSI-X vectors, but it really | |
2345 | * doesn't do us much good if we have a lot more vectors | |
2346 | * than CPU's. So let's be conservative and only ask for | |
2347 | * (roughly) twice the number of vectors as there are CPU's. | |
2348 | */ | |
2349 | v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues, | |
2350 | (int)(num_online_cpus() * 2)) + NON_Q_VECTORS; | |
2351 | ||
2352 | /* | |
2353 | * At the same time, hardware can only support a maximum of | |
2354 | * MAX_MSIX_COUNT vectors. With features such as RSS and VMDq, | |
2355 | * we can easily reach upwards of 64 Rx descriptor queues and | |
2356 | * 32 Tx queues. Thus, we cap it off in those rare cases where | |
2357 | * the cpu count also exceeds our vector limit. | |
2358 | */ | |
2359 | v_budget = min(v_budget, MAX_MSIX_COUNT); | |
2360 | ||
2361 | /* A failure in MSI-X entry allocation isn't fatal, but it does | |
2362 | * mean we disable MSI-X capabilities of the adapter. */ | |
2363 | adapter->msix_entries = kcalloc(v_budget, | |
2364 | sizeof(struct msix_entry), GFP_KERNEL); | |
2365 | if (!adapter->msix_entries) { | |
2366 | adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED; | |
2367 | ixgbe_set_num_queues(adapter); | |
2368 | kfree(adapter->tx_ring); | |
2369 | kfree(adapter->rx_ring); | |
2370 | err = ixgbe_alloc_queues(adapter); | |
2371 | if (err) { | |
2372 | DPRINTK(PROBE, ERR, "Unable to allocate memory " | |
2373 | "for queues\n"); | |
2374 | goto out; | |
2375 | } | |
2376 | ||
2377 | goto try_msi; | |
2378 | } | |
2379 | ||
2380 | for (vector = 0; vector < v_budget; vector++) | |
2381 | adapter->msix_entries[vector].entry = vector; | |
2382 | ||
2383 | ixgbe_acquire_msix_vectors(adapter, v_budget); | |
2384 | ||
2385 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) | |
2386 | goto out; | |
2387 | ||
2388 | try_msi: | |
2389 | err = pci_enable_msi(adapter->pdev); | |
2390 | if (!err) { | |
2391 | adapter->flags |= IXGBE_FLAG_MSI_ENABLED; | |
2392 | } else { | |
2393 | DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, " | |
2394 | "falling back to legacy. Error: %d\n", err); | |
2395 | /* reset err */ | |
2396 | err = 0; | |
2397 | } | |
2398 | ||
2399 | out: | |
30eba97a | 2400 | /* Notify the stack of the (possibly) reduced Tx Queue count. */ |
fd2ea0a7 | 2401 | adapter->netdev->real_num_tx_queues = adapter->num_tx_queues; |
021230d4 AV |
2402 | |
2403 | return err; | |
2404 | } | |
2405 | ||
2406 | static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter) | |
2407 | { | |
2408 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { | |
2409 | adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED; | |
2410 | pci_disable_msix(adapter->pdev); | |
2411 | kfree(adapter->msix_entries); | |
2412 | adapter->msix_entries = NULL; | |
2413 | } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) { | |
2414 | adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED; | |
2415 | pci_disable_msi(adapter->pdev); | |
2416 | } | |
2417 | return; | |
2418 | } | |
2419 | ||
2420 | /** | |
2421 | * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme | |
2422 | * @adapter: board private structure to initialize | |
2423 | * | |
2424 | * We determine which interrupt scheme to use based on... | |
2425 | * - Kernel support (MSI, MSI-X) | |
2426 | * - which can be user-defined (via MODULE_PARAM) | |
2427 | * - Hardware queue count (num_*_queues) | |
2428 | * - defined by miscellaneous hardware support/features (RSS, etc.) | |
2429 | **/ | |
2430 | static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter) | |
2431 | { | |
2432 | int err; | |
2433 | ||
2434 | /* Number of supported queues */ | |
2435 | ixgbe_set_num_queues(adapter); | |
2436 | ||
2437 | err = ixgbe_alloc_queues(adapter); | |
2438 | if (err) { | |
2439 | DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n"); | |
2440 | goto err_alloc_queues; | |
2441 | } | |
2442 | ||
2443 | err = ixgbe_set_interrupt_capability(adapter); | |
2444 | if (err) { | |
2445 | DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n"); | |
2446 | goto err_set_interrupt; | |
9a799d71 AK |
2447 | } |
2448 | ||
021230d4 AV |
2449 | DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, " |
2450 | "Tx Queue count = %u\n", | |
2451 | (adapter->num_rx_queues > 1) ? "Enabled" : | |
2452 | "Disabled", adapter->num_rx_queues, adapter->num_tx_queues); | |
2453 | ||
2454 | set_bit(__IXGBE_DOWN, &adapter->state); | |
2455 | ||
9a799d71 | 2456 | return 0; |
021230d4 AV |
2457 | |
2458 | err_set_interrupt: | |
2459 | kfree(adapter->tx_ring); | |
2460 | kfree(adapter->rx_ring); | |
2461 | err_alloc_queues: | |
2462 | return err; | |
9a799d71 AK |
2463 | } |
2464 | ||
2465 | /** | |
2466 | * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter) | |
2467 | * @adapter: board private structure to initialize | |
2468 | * | |
2469 | * ixgbe_sw_init initializes the Adapter private data structure. | |
2470 | * Fields are initialized based on PCI device information and | |
2471 | * OS network device settings (MTU size). | |
2472 | **/ | |
2473 | static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter) | |
2474 | { | |
2475 | struct ixgbe_hw *hw = &adapter->hw; | |
2476 | struct pci_dev *pdev = adapter->pdev; | |
021230d4 AV |
2477 | unsigned int rss; |
2478 | ||
2479 | /* Set capability flags */ | |
2480 | rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus()); | |
2481 | adapter->ring_feature[RING_F_RSS].indices = rss; | |
2482 | adapter->flags |= IXGBE_FLAG_RSS_ENABLED; | |
9a799d71 | 2483 | |
f494e8fa AV |
2484 | /* Enable Dynamic interrupt throttling by default */ |
2485 | adapter->rx_eitr = 1; | |
2486 | adapter->tx_eitr = 1; | |
2487 | ||
9a799d71 | 2488 | /* default flow control settings */ |
2b9ade93 JB |
2489 | hw->fc.original_type = ixgbe_fc_none; |
2490 | hw->fc.type = ixgbe_fc_none; | |
2491 | hw->fc.high_water = IXGBE_DEFAULT_FCRTH; | |
2492 | hw->fc.low_water = IXGBE_DEFAULT_FCRTL; | |
2493 | hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE; | |
2494 | hw->fc.send_xon = true; | |
9a799d71 | 2495 | |
021230d4 | 2496 | /* select 10G link by default */ |
9a799d71 AK |
2497 | hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN; |
2498 | if (hw->mac.ops.reset(hw)) { | |
2499 | dev_err(&pdev->dev, "HW Init failed\n"); | |
2500 | return -EIO; | |
2501 | } | |
3957d63d AK |
2502 | if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true, |
2503 | false)) { | |
9a799d71 AK |
2504 | dev_err(&pdev->dev, "Link Speed setup failed\n"); |
2505 | return -EIO; | |
2506 | } | |
2507 | ||
2508 | /* initialize eeprom parameters */ | |
2509 | if (ixgbe_init_eeprom(hw)) { | |
2510 | dev_err(&pdev->dev, "EEPROM initialization failed\n"); | |
2511 | return -EIO; | |
2512 | } | |
2513 | ||
021230d4 | 2514 | /* enable rx csum by default */ |
9a799d71 AK |
2515 | adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED; |
2516 | ||
9a799d71 AK |
2517 | set_bit(__IXGBE_DOWN, &adapter->state); |
2518 | ||
2519 | return 0; | |
2520 | } | |
2521 | ||
2522 | /** | |
2523 | * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors) | |
2524 | * @adapter: board private structure | |
3a581073 | 2525 | * @tx_ring: tx descriptor ring (for a specific queue) to setup |
9a799d71 AK |
2526 | * |
2527 | * Return 0 on success, negative on failure | |
2528 | **/ | |
2529 | int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter, | |
e01c31a5 | 2530 | struct ixgbe_ring *tx_ring) |
9a799d71 AK |
2531 | { |
2532 | struct pci_dev *pdev = adapter->pdev; | |
2533 | int size; | |
2534 | ||
3a581073 JB |
2535 | size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count; |
2536 | tx_ring->tx_buffer_info = vmalloc(size); | |
e01c31a5 JB |
2537 | if (!tx_ring->tx_buffer_info) |
2538 | goto err; | |
3a581073 | 2539 | memset(tx_ring->tx_buffer_info, 0, size); |
9a799d71 AK |
2540 | |
2541 | /* round up to nearest 4K */ | |
e01c31a5 JB |
2542 | tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc) + |
2543 | sizeof(u32); | |
3a581073 | 2544 | tx_ring->size = ALIGN(tx_ring->size, 4096); |
9a799d71 | 2545 | |
3a581073 JB |
2546 | tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size, |
2547 | &tx_ring->dma); | |
e01c31a5 JB |
2548 | if (!tx_ring->desc) |
2549 | goto err; | |
9a799d71 | 2550 | |
3a581073 JB |
2551 | tx_ring->next_to_use = 0; |
2552 | tx_ring->next_to_clean = 0; | |
2553 | tx_ring->work_limit = tx_ring->count; | |
9a799d71 | 2554 | return 0; |
e01c31a5 JB |
2555 | |
2556 | err: | |
2557 | vfree(tx_ring->tx_buffer_info); | |
2558 | tx_ring->tx_buffer_info = NULL; | |
2559 | DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit " | |
2560 | "descriptor ring\n"); | |
2561 | return -ENOMEM; | |
9a799d71 AK |
2562 | } |
2563 | ||
2564 | /** | |
2565 | * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors) | |
2566 | * @adapter: board private structure | |
3a581073 | 2567 | * @rx_ring: rx descriptor ring (for a specific queue) to setup |
9a799d71 AK |
2568 | * |
2569 | * Returns 0 on success, negative on failure | |
2570 | **/ | |
2571 | int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter, | |
3a581073 | 2572 | struct ixgbe_ring *rx_ring) |
9a799d71 AK |
2573 | { |
2574 | struct pci_dev *pdev = adapter->pdev; | |
021230d4 | 2575 | int size; |
9a799d71 | 2576 | |
177db6ff | 2577 | size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS; |
3a581073 JB |
2578 | rx_ring->lro_mgr.lro_arr = vmalloc(size); |
2579 | if (!rx_ring->lro_mgr.lro_arr) | |
177db6ff | 2580 | return -ENOMEM; |
3a581073 | 2581 | memset(rx_ring->lro_mgr.lro_arr, 0, size); |
177db6ff | 2582 | |
3a581073 JB |
2583 | size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count; |
2584 | rx_ring->rx_buffer_info = vmalloc(size); | |
2585 | if (!rx_ring->rx_buffer_info) { | |
9a799d71 AK |
2586 | DPRINTK(PROBE, ERR, |
2587 | "vmalloc allocation failed for the rx desc ring\n"); | |
177db6ff | 2588 | goto alloc_failed; |
9a799d71 | 2589 | } |
3a581073 | 2590 | memset(rx_ring->rx_buffer_info, 0, size); |
9a799d71 | 2591 | |
9a799d71 | 2592 | /* Round up to nearest 4K */ |
3a581073 JB |
2593 | rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc); |
2594 | rx_ring->size = ALIGN(rx_ring->size, 4096); | |
9a799d71 | 2595 | |
3a581073 | 2596 | rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma); |
9a799d71 | 2597 | |
3a581073 | 2598 | if (!rx_ring->desc) { |
9a799d71 AK |
2599 | DPRINTK(PROBE, ERR, |
2600 | "Memory allocation failed for the rx desc ring\n"); | |
3a581073 | 2601 | vfree(rx_ring->rx_buffer_info); |
177db6ff | 2602 | goto alloc_failed; |
9a799d71 AK |
2603 | } |
2604 | ||
3a581073 JB |
2605 | rx_ring->next_to_clean = 0; |
2606 | rx_ring->next_to_use = 0; | |
9a799d71 AK |
2607 | |
2608 | return 0; | |
177db6ff MC |
2609 | |
2610 | alloc_failed: | |
3a581073 JB |
2611 | vfree(rx_ring->lro_mgr.lro_arr); |
2612 | rx_ring->lro_mgr.lro_arr = NULL; | |
177db6ff | 2613 | return -ENOMEM; |
9a799d71 AK |
2614 | } |
2615 | ||
2616 | /** | |
2617 | * ixgbe_free_tx_resources - Free Tx Resources per Queue | |
2618 | * @adapter: board private structure | |
2619 | * @tx_ring: Tx descriptor ring for a specific queue | |
2620 | * | |
2621 | * Free all transmit software resources | |
2622 | **/ | |
2623 | static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter, | |
e01c31a5 | 2624 | struct ixgbe_ring *tx_ring) |
9a799d71 AK |
2625 | { |
2626 | struct pci_dev *pdev = adapter->pdev; | |
2627 | ||
2628 | ixgbe_clean_tx_ring(adapter, tx_ring); | |
2629 | ||
2630 | vfree(tx_ring->tx_buffer_info); | |
2631 | tx_ring->tx_buffer_info = NULL; | |
2632 | ||
2633 | pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma); | |
2634 | ||
2635 | tx_ring->desc = NULL; | |
2636 | } | |
2637 | ||
2638 | /** | |
2639 | * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues | |
2640 | * @adapter: board private structure | |
2641 | * | |
2642 | * Free all transmit software resources | |
2643 | **/ | |
2644 | static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter) | |
2645 | { | |
2646 | int i; | |
2647 | ||
2648 | for (i = 0; i < adapter->num_tx_queues; i++) | |
2649 | ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]); | |
2650 | } | |
2651 | ||
2652 | /** | |
2653 | * ixgbe_free_rx_resources - Free Rx Resources | |
2654 | * @adapter: board private structure | |
2655 | * @rx_ring: ring to clean the resources from | |
2656 | * | |
2657 | * Free all receive software resources | |
2658 | **/ | |
2659 | static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter, | |
2660 | struct ixgbe_ring *rx_ring) | |
2661 | { | |
2662 | struct pci_dev *pdev = adapter->pdev; | |
2663 | ||
177db6ff MC |
2664 | vfree(rx_ring->lro_mgr.lro_arr); |
2665 | rx_ring->lro_mgr.lro_arr = NULL; | |
2666 | ||
9a799d71 AK |
2667 | ixgbe_clean_rx_ring(adapter, rx_ring); |
2668 | ||
2669 | vfree(rx_ring->rx_buffer_info); | |
2670 | rx_ring->rx_buffer_info = NULL; | |
2671 | ||
2672 | pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); | |
2673 | ||
2674 | rx_ring->desc = NULL; | |
2675 | } | |
2676 | ||
2677 | /** | |
2678 | * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues | |
2679 | * @adapter: board private structure | |
2680 | * | |
2681 | * Free all receive software resources | |
2682 | **/ | |
2683 | static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter) | |
2684 | { | |
2685 | int i; | |
2686 | ||
2687 | for (i = 0; i < adapter->num_rx_queues; i++) | |
2688 | ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]); | |
2689 | } | |
2690 | ||
2691 | /** | |
021230d4 | 2692 | * ixgbe_setup_all_tx_resources - allocate all queues Tx resources |
9a799d71 AK |
2693 | * @adapter: board private structure |
2694 | * | |
2695 | * If this function returns with an error, then it's possible one or | |
2696 | * more of the rings is populated (while the rest are not). It is the | |
2697 | * callers duty to clean those orphaned rings. | |
2698 | * | |
2699 | * Return 0 on success, negative on failure | |
2700 | **/ | |
2701 | static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter) | |
2702 | { | |
2703 | int i, err = 0; | |
2704 | ||
2705 | for (i = 0; i < adapter->num_tx_queues; i++) { | |
2706 | err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]); | |
2707 | if (err) { | |
2708 | DPRINTK(PROBE, ERR, | |
2709 | "Allocation for Tx Queue %u failed\n", i); | |
2710 | break; | |
2711 | } | |
2712 | } | |
2713 | ||
2714 | return err; | |
2715 | } | |
2716 | ||
2717 | /** | |
021230d4 | 2718 | * ixgbe_setup_all_rx_resources - allocate all queues Rx resources |
9a799d71 AK |
2719 | * @adapter: board private structure |
2720 | * | |
2721 | * If this function returns with an error, then it's possible one or | |
2722 | * more of the rings is populated (while the rest are not). It is the | |
2723 | * callers duty to clean those orphaned rings. | |
2724 | * | |
2725 | * Return 0 on success, negative on failure | |
2726 | **/ | |
2727 | ||
2728 | static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter) | |
2729 | { | |
2730 | int i, err = 0; | |
2731 | ||
2732 | for (i = 0; i < adapter->num_rx_queues; i++) { | |
2733 | err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]); | |
2734 | if (err) { | |
2735 | DPRINTK(PROBE, ERR, | |
2736 | "Allocation for Rx Queue %u failed\n", i); | |
2737 | break; | |
2738 | } | |
2739 | } | |
2740 | ||
2741 | return err; | |
2742 | } | |
2743 | ||
2744 | /** | |
2745 | * ixgbe_change_mtu - Change the Maximum Transfer Unit | |
2746 | * @netdev: network interface device structure | |
2747 | * @new_mtu: new value for maximum frame size | |
2748 | * | |
2749 | * Returns 0 on success, negative on failure | |
2750 | **/ | |
2751 | static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu) | |
2752 | { | |
2753 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
2754 | int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN; | |
2755 | ||
2756 | if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) || | |
2757 | (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE)) | |
2758 | return -EINVAL; | |
2759 | ||
021230d4 AV |
2760 | DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n", |
2761 | netdev->mtu, new_mtu); | |
2762 | /* must set new MTU before calling down or up */ | |
9a799d71 AK |
2763 | netdev->mtu = new_mtu; |
2764 | ||
d4f80882 AV |
2765 | if (netif_running(netdev)) |
2766 | ixgbe_reinit_locked(adapter); | |
9a799d71 AK |
2767 | |
2768 | return 0; | |
2769 | } | |
2770 | ||
2771 | /** | |
2772 | * ixgbe_open - Called when a network interface is made active | |
2773 | * @netdev: network interface device structure | |
2774 | * | |
2775 | * Returns 0 on success, negative value on failure | |
2776 | * | |
2777 | * The open entry point is called when a network interface is made | |
2778 | * active by the system (IFF_UP). At this point all resources needed | |
2779 | * for transmit and receive operations are allocated, the interrupt | |
2780 | * handler is registered with the OS, the watchdog timer is started, | |
2781 | * and the stack is notified that the interface is ready. | |
2782 | **/ | |
2783 | static int ixgbe_open(struct net_device *netdev) | |
2784 | { | |
2785 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
2786 | int err; | |
4bebfaa5 AK |
2787 | |
2788 | /* disallow open during test */ | |
2789 | if (test_bit(__IXGBE_TESTING, &adapter->state)) | |
2790 | return -EBUSY; | |
9a799d71 | 2791 | |
9a799d71 AK |
2792 | /* allocate transmit descriptors */ |
2793 | err = ixgbe_setup_all_tx_resources(adapter); | |
2794 | if (err) | |
2795 | goto err_setup_tx; | |
2796 | ||
9a799d71 AK |
2797 | /* allocate receive descriptors */ |
2798 | err = ixgbe_setup_all_rx_resources(adapter); | |
2799 | if (err) | |
2800 | goto err_setup_rx; | |
2801 | ||
2802 | ixgbe_configure(adapter); | |
2803 | ||
021230d4 | 2804 | err = ixgbe_request_irq(adapter); |
9a799d71 AK |
2805 | if (err) |
2806 | goto err_req_irq; | |
2807 | ||
9a799d71 AK |
2808 | err = ixgbe_up_complete(adapter); |
2809 | if (err) | |
2810 | goto err_up; | |
2811 | ||
d55b53ff JK |
2812 | netif_tx_start_all_queues(netdev); |
2813 | ||
9a799d71 AK |
2814 | return 0; |
2815 | ||
2816 | err_up: | |
5eba3699 | 2817 | ixgbe_release_hw_control(adapter); |
9a799d71 AK |
2818 | ixgbe_free_irq(adapter); |
2819 | err_req_irq: | |
2820 | ixgbe_free_all_rx_resources(adapter); | |
2821 | err_setup_rx: | |
2822 | ixgbe_free_all_tx_resources(adapter); | |
2823 | err_setup_tx: | |
2824 | ixgbe_reset(adapter); | |
2825 | ||
2826 | return err; | |
2827 | } | |
2828 | ||
2829 | /** | |
2830 | * ixgbe_close - Disables a network interface | |
2831 | * @netdev: network interface device structure | |
2832 | * | |
2833 | * Returns 0, this is not allowed to fail | |
2834 | * | |
2835 | * The close entry point is called when an interface is de-activated | |
2836 | * by the OS. The hardware is still under the drivers control, but | |
2837 | * needs to be disabled. A global MAC reset is issued to stop the | |
2838 | * hardware, and all transmit and receive resources are freed. | |
2839 | **/ | |
2840 | static int ixgbe_close(struct net_device *netdev) | |
2841 | { | |
2842 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
9a799d71 AK |
2843 | |
2844 | ixgbe_down(adapter); | |
2845 | ixgbe_free_irq(adapter); | |
2846 | ||
2847 | ixgbe_free_all_tx_resources(adapter); | |
2848 | ixgbe_free_all_rx_resources(adapter); | |
2849 | ||
5eba3699 | 2850 | ixgbe_release_hw_control(adapter); |
9a799d71 AK |
2851 | |
2852 | return 0; | |
2853 | } | |
2854 | ||
2855 | /** | |
2856 | * ixgbe_update_stats - Update the board statistics counters. | |
2857 | * @adapter: board private structure | |
2858 | **/ | |
2859 | void ixgbe_update_stats(struct ixgbe_adapter *adapter) | |
2860 | { | |
2861 | struct ixgbe_hw *hw = &adapter->hw; | |
6f11eef7 AV |
2862 | u64 total_mpc = 0; |
2863 | u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot; | |
9a799d71 AK |
2864 | |
2865 | adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS); | |
6f11eef7 AV |
2866 | for (i = 0; i < 8; i++) { |
2867 | /* for packet buffers not used, the register should read 0 */ | |
2868 | mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i)); | |
2869 | missed_rx += mpc; | |
2870 | adapter->stats.mpc[i] += mpc; | |
2871 | total_mpc += adapter->stats.mpc[i]; | |
2872 | adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i)); | |
2873 | } | |
2874 | adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC); | |
2875 | /* work around hardware counting issue */ | |
2876 | adapter->stats.gprc -= missed_rx; | |
2877 | ||
2878 | /* 82598 hardware only has a 32 bit counter in the high register */ | |
9a799d71 | 2879 | adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH); |
6f11eef7 AV |
2880 | adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH); |
2881 | adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH); | |
9a799d71 AK |
2882 | bprc = IXGBE_READ_REG(hw, IXGBE_BPRC); |
2883 | adapter->stats.bprc += bprc; | |
2884 | adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC); | |
2885 | adapter->stats.mprc -= bprc; | |
2886 | adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC); | |
2887 | adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64); | |
2888 | adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127); | |
2889 | adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255); | |
2890 | adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511); | |
2891 | adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023); | |
2892 | adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522); | |
9a799d71 AK |
2893 | adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC); |
2894 | adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC); | |
9a799d71 | 2895 | adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC); |
6f11eef7 AV |
2896 | lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC); |
2897 | adapter->stats.lxontxc += lxon; | |
2898 | lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC); | |
2899 | adapter->stats.lxofftxc += lxoff; | |
9a799d71 AK |
2900 | adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC); |
2901 | adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC); | |
6f11eef7 AV |
2902 | adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC); |
2903 | /* | |
2904 | * 82598 errata - tx of flow control packets is included in tx counters | |
2905 | */ | |
2906 | xon_off_tot = lxon + lxoff; | |
2907 | adapter->stats.gptc -= xon_off_tot; | |
2908 | adapter->stats.mptc -= xon_off_tot; | |
2909 | adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN)); | |
9a799d71 AK |
2910 | adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC); |
2911 | adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC); | |
2912 | adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC); | |
9a799d71 AK |
2913 | adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR); |
2914 | adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64); | |
6f11eef7 | 2915 | adapter->stats.ptc64 -= xon_off_tot; |
9a799d71 AK |
2916 | adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127); |
2917 | adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255); | |
2918 | adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511); | |
2919 | adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023); | |
2920 | adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522); | |
9a799d71 AK |
2921 | adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC); |
2922 | ||
2923 | /* Fill out the OS statistics structure */ | |
9a799d71 AK |
2924 | adapter->net_stats.multicast = adapter->stats.mprc; |
2925 | ||
2926 | /* Rx Errors */ | |
2927 | adapter->net_stats.rx_errors = adapter->stats.crcerrs + | |
2928 | adapter->stats.rlec; | |
2929 | adapter->net_stats.rx_dropped = 0; | |
2930 | adapter->net_stats.rx_length_errors = adapter->stats.rlec; | |
2931 | adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs; | |
6f11eef7 | 2932 | adapter->net_stats.rx_missed_errors = total_mpc; |
9a799d71 AK |
2933 | } |
2934 | ||
2935 | /** | |
2936 | * ixgbe_watchdog - Timer Call-back | |
2937 | * @data: pointer to adapter cast into an unsigned long | |
2938 | **/ | |
2939 | static void ixgbe_watchdog(unsigned long data) | |
2940 | { | |
2941 | struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data; | |
2942 | struct net_device *netdev = adapter->netdev; | |
2943 | bool link_up; | |
2944 | u32 link_speed = 0; | |
2945 | ||
3957d63d | 2946 | adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up); |
9a799d71 AK |
2947 | |
2948 | if (link_up) { | |
2949 | if (!netif_carrier_ok(netdev)) { | |
2950 | u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL); | |
2951 | u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS); | |
2952 | #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE) | |
2953 | #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X) | |
2954 | DPRINTK(LINK, INFO, "NIC Link is Up %s, " | |
2955 | "Flow Control: %s\n", | |
2956 | (link_speed == IXGBE_LINK_SPEED_10GB_FULL ? | |
2957 | "10 Gbps" : | |
2958 | (link_speed == IXGBE_LINK_SPEED_1GB_FULL ? | |
5a059e9d | 2959 | "1 Gbps" : "unknown speed")), |
9a799d71 AK |
2960 | ((FLOW_RX && FLOW_TX) ? "RX/TX" : |
2961 | (FLOW_RX ? "RX" : | |
2962 | (FLOW_TX ? "TX" : "None")))); | |
2963 | ||
2964 | netif_carrier_on(netdev); | |
fd2ea0a7 | 2965 | netif_tx_wake_all_queues(netdev); |
9a799d71 AK |
2966 | } else { |
2967 | /* Force detection of hung controller */ | |
2968 | adapter->detect_tx_hung = true; | |
2969 | } | |
2970 | } else { | |
2971 | if (netif_carrier_ok(netdev)) { | |
2972 | DPRINTK(LINK, INFO, "NIC Link is Down\n"); | |
2973 | netif_carrier_off(netdev); | |
fd2ea0a7 | 2974 | netif_tx_stop_all_queues(netdev); |
9a799d71 AK |
2975 | } |
2976 | } | |
2977 | ||
2978 | ixgbe_update_stats(adapter); | |
2979 | ||
021230d4 AV |
2980 | if (!test_bit(__IXGBE_DOWN, &adapter->state)) { |
2981 | /* Cause software interrupt to ensure rx rings are cleaned */ | |
2982 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { | |
2983 | u32 eics = | |
2984 | (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1; | |
2985 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, eics); | |
2986 | } else { | |
2987 | /* for legacy and MSI interrupts don't set any bits that | |
2988 | * are enabled for EIAM, because this operation would | |
2989 | * set *both* EIMS and EICS for any bit in EIAM */ | |
2990 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, | |
2991 | (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER)); | |
2992 | } | |
2993 | /* Reset the timer */ | |
9a799d71 AK |
2994 | mod_timer(&adapter->watchdog_timer, |
2995 | round_jiffies(jiffies + 2 * HZ)); | |
021230d4 | 2996 | } |
9a799d71 AK |
2997 | } |
2998 | ||
9a799d71 AK |
2999 | static int ixgbe_tso(struct ixgbe_adapter *adapter, |
3000 | struct ixgbe_ring *tx_ring, struct sk_buff *skb, | |
3001 | u32 tx_flags, u8 *hdr_len) | |
3002 | { | |
3003 | struct ixgbe_adv_tx_context_desc *context_desc; | |
3004 | unsigned int i; | |
3005 | int err; | |
3006 | struct ixgbe_tx_buffer *tx_buffer_info; | |
3007 | u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; | |
3008 | u32 mss_l4len_idx = 0, l4len; | |
9a799d71 AK |
3009 | |
3010 | if (skb_is_gso(skb)) { | |
3011 | if (skb_header_cloned(skb)) { | |
3012 | err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); | |
3013 | if (err) | |
3014 | return err; | |
3015 | } | |
3016 | l4len = tcp_hdrlen(skb); | |
3017 | *hdr_len += l4len; | |
3018 | ||
8327d000 | 3019 | if (skb->protocol == htons(ETH_P_IP)) { |
9a799d71 AK |
3020 | struct iphdr *iph = ip_hdr(skb); |
3021 | iph->tot_len = 0; | |
3022 | iph->check = 0; | |
3023 | tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, | |
3024 | iph->daddr, 0, | |
3025 | IPPROTO_TCP, | |
3026 | 0); | |
3027 | adapter->hw_tso_ctxt++; | |
3028 | } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) { | |
3029 | ipv6_hdr(skb)->payload_len = 0; | |
3030 | tcp_hdr(skb)->check = | |
3031 | ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, | |
3032 | &ipv6_hdr(skb)->daddr, | |
3033 | 0, IPPROTO_TCP, 0); | |
3034 | adapter->hw_tso6_ctxt++; | |
3035 | } | |
3036 | ||
3037 | i = tx_ring->next_to_use; | |
3038 | ||
3039 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
3040 | context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); | |
3041 | ||
3042 | /* VLAN MACLEN IPLEN */ | |
3043 | if (tx_flags & IXGBE_TX_FLAGS_VLAN) | |
3044 | vlan_macip_lens |= | |
3045 | (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK); | |
3046 | vlan_macip_lens |= ((skb_network_offset(skb)) << | |
3047 | IXGBE_ADVTXD_MACLEN_SHIFT); | |
3048 | *hdr_len += skb_network_offset(skb); | |
3049 | vlan_macip_lens |= | |
3050 | (skb_transport_header(skb) - skb_network_header(skb)); | |
3051 | *hdr_len += | |
3052 | (skb_transport_header(skb) - skb_network_header(skb)); | |
3053 | context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); | |
3054 | context_desc->seqnum_seed = 0; | |
3055 | ||
3056 | /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */ | |
3057 | type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT | | |
3058 | IXGBE_ADVTXD_DTYP_CTXT); | |
3059 | ||
8327d000 | 3060 | if (skb->protocol == htons(ETH_P_IP)) |
9a799d71 AK |
3061 | type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; |
3062 | type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP; | |
3063 | context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); | |
3064 | ||
3065 | /* MSS L4LEN IDX */ | |
3066 | mss_l4len_idx |= | |
3067 | (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT); | |
3068 | mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT); | |
3069 | context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx); | |
3070 | ||
3071 | tx_buffer_info->time_stamp = jiffies; | |
3072 | tx_buffer_info->next_to_watch = i; | |
3073 | ||
3074 | i++; | |
3075 | if (i == tx_ring->count) | |
3076 | i = 0; | |
3077 | tx_ring->next_to_use = i; | |
3078 | ||
3079 | return true; | |
3080 | } | |
3081 | return false; | |
3082 | } | |
3083 | ||
3084 | static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter, | |
3085 | struct ixgbe_ring *tx_ring, | |
3086 | struct sk_buff *skb, u32 tx_flags) | |
3087 | { | |
3088 | struct ixgbe_adv_tx_context_desc *context_desc; | |
3089 | unsigned int i; | |
3090 | struct ixgbe_tx_buffer *tx_buffer_info; | |
3091 | u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0; | |
3092 | ||
3093 | if (skb->ip_summed == CHECKSUM_PARTIAL || | |
3094 | (tx_flags & IXGBE_TX_FLAGS_VLAN)) { | |
3095 | i = tx_ring->next_to_use; | |
3096 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
3097 | context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i); | |
3098 | ||
3099 | if (tx_flags & IXGBE_TX_FLAGS_VLAN) | |
3100 | vlan_macip_lens |= | |
3101 | (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK); | |
3102 | vlan_macip_lens |= (skb_network_offset(skb) << | |
3103 | IXGBE_ADVTXD_MACLEN_SHIFT); | |
3104 | if (skb->ip_summed == CHECKSUM_PARTIAL) | |
3105 | vlan_macip_lens |= (skb_transport_header(skb) - | |
3106 | skb_network_header(skb)); | |
3107 | ||
3108 | context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens); | |
3109 | context_desc->seqnum_seed = 0; | |
3110 | ||
3111 | type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT | | |
3112 | IXGBE_ADVTXD_DTYP_CTXT); | |
3113 | ||
3114 | if (skb->ip_summed == CHECKSUM_PARTIAL) { | |
41825d71 AK |
3115 | switch (skb->protocol) { |
3116 | case __constant_htons(ETH_P_IP): | |
9a799d71 | 3117 | type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4; |
41825d71 AK |
3118 | if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
3119 | type_tucmd_mlhl |= | |
3120 | IXGBE_ADVTXD_TUCMD_L4T_TCP; | |
3121 | break; | |
3122 | ||
3123 | case __constant_htons(ETH_P_IPV6): | |
3124 | /* XXX what about other V6 headers?? */ | |
3125 | if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) | |
3126 | type_tucmd_mlhl |= | |
3127 | IXGBE_ADVTXD_TUCMD_L4T_TCP; | |
3128 | break; | |
9a799d71 | 3129 | |
41825d71 AK |
3130 | default: |
3131 | if (unlikely(net_ratelimit())) { | |
3132 | DPRINTK(PROBE, WARNING, | |
3133 | "partial checksum but proto=%x!\n", | |
3134 | skb->protocol); | |
3135 | } | |
3136 | break; | |
3137 | } | |
9a799d71 AK |
3138 | } |
3139 | ||
3140 | context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl); | |
3141 | context_desc->mss_l4len_idx = 0; | |
3142 | ||
3143 | tx_buffer_info->time_stamp = jiffies; | |
3144 | tx_buffer_info->next_to_watch = i; | |
3145 | adapter->hw_csum_tx_good++; | |
3146 | i++; | |
3147 | if (i == tx_ring->count) | |
3148 | i = 0; | |
3149 | tx_ring->next_to_use = i; | |
3150 | ||
3151 | return true; | |
3152 | } | |
3153 | return false; | |
3154 | } | |
3155 | ||
3156 | static int ixgbe_tx_map(struct ixgbe_adapter *adapter, | |
3157 | struct ixgbe_ring *tx_ring, | |
3158 | struct sk_buff *skb, unsigned int first) | |
3159 | { | |
3160 | struct ixgbe_tx_buffer *tx_buffer_info; | |
3161 | unsigned int len = skb->len; | |
3162 | unsigned int offset = 0, size, count = 0, i; | |
3163 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; | |
3164 | unsigned int f; | |
3165 | ||
3166 | len -= skb->data_len; | |
3167 | ||
3168 | i = tx_ring->next_to_use; | |
3169 | ||
3170 | while (len) { | |
3171 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
3172 | size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD); | |
3173 | ||
3174 | tx_buffer_info->length = size; | |
3175 | tx_buffer_info->dma = pci_map_single(adapter->pdev, | |
3176 | skb->data + offset, | |
3177 | size, PCI_DMA_TODEVICE); | |
3178 | tx_buffer_info->time_stamp = jiffies; | |
3179 | tx_buffer_info->next_to_watch = i; | |
3180 | ||
3181 | len -= size; | |
3182 | offset += size; | |
3183 | count++; | |
3184 | i++; | |
3185 | if (i == tx_ring->count) | |
3186 | i = 0; | |
3187 | } | |
3188 | ||
3189 | for (f = 0; f < nr_frags; f++) { | |
3190 | struct skb_frag_struct *frag; | |
3191 | ||
3192 | frag = &skb_shinfo(skb)->frags[f]; | |
3193 | len = frag->size; | |
3194 | offset = frag->page_offset; | |
3195 | ||
3196 | while (len) { | |
3197 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
3198 | size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD); | |
3199 | ||
3200 | tx_buffer_info->length = size; | |
3201 | tx_buffer_info->dma = pci_map_page(adapter->pdev, | |
3202 | frag->page, | |
3203 | offset, | |
3204 | size, PCI_DMA_TODEVICE); | |
3205 | tx_buffer_info->time_stamp = jiffies; | |
3206 | tx_buffer_info->next_to_watch = i; | |
3207 | ||
3208 | len -= size; | |
3209 | offset += size; | |
3210 | count++; | |
3211 | i++; | |
3212 | if (i == tx_ring->count) | |
3213 | i = 0; | |
3214 | } | |
3215 | } | |
3216 | if (i == 0) | |
3217 | i = tx_ring->count - 1; | |
3218 | else | |
3219 | i = i - 1; | |
3220 | tx_ring->tx_buffer_info[i].skb = skb; | |
3221 | tx_ring->tx_buffer_info[first].next_to_watch = i; | |
3222 | ||
3223 | return count; | |
3224 | } | |
3225 | ||
3226 | static void ixgbe_tx_queue(struct ixgbe_adapter *adapter, | |
3227 | struct ixgbe_ring *tx_ring, | |
3228 | int tx_flags, int count, u32 paylen, u8 hdr_len) | |
3229 | { | |
3230 | union ixgbe_adv_tx_desc *tx_desc = NULL; | |
3231 | struct ixgbe_tx_buffer *tx_buffer_info; | |
3232 | u32 olinfo_status = 0, cmd_type_len = 0; | |
3233 | unsigned int i; | |
3234 | u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS; | |
3235 | ||
3236 | cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA; | |
3237 | ||
3238 | cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT; | |
3239 | ||
3240 | if (tx_flags & IXGBE_TX_FLAGS_VLAN) | |
3241 | cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE; | |
3242 | ||
3243 | if (tx_flags & IXGBE_TX_FLAGS_TSO) { | |
3244 | cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE; | |
3245 | ||
3246 | olinfo_status |= IXGBE_TXD_POPTS_TXSM << | |
3247 | IXGBE_ADVTXD_POPTS_SHIFT; | |
3248 | ||
3249 | if (tx_flags & IXGBE_TX_FLAGS_IPV4) | |
3250 | olinfo_status |= IXGBE_TXD_POPTS_IXSM << | |
3251 | IXGBE_ADVTXD_POPTS_SHIFT; | |
3252 | ||
3253 | } else if (tx_flags & IXGBE_TX_FLAGS_CSUM) | |
3254 | olinfo_status |= IXGBE_TXD_POPTS_TXSM << | |
3255 | IXGBE_ADVTXD_POPTS_SHIFT; | |
3256 | ||
3257 | olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT); | |
3258 | ||
3259 | i = tx_ring->next_to_use; | |
3260 | while (count--) { | |
3261 | tx_buffer_info = &tx_ring->tx_buffer_info[i]; | |
3262 | tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i); | |
3263 | tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma); | |
3264 | tx_desc->read.cmd_type_len = | |
3265 | cpu_to_le32(cmd_type_len | tx_buffer_info->length); | |
3266 | tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status); | |
3267 | ||
3268 | i++; | |
3269 | if (i == tx_ring->count) | |
3270 | i = 0; | |
3271 | } | |
3272 | ||
3273 | tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd); | |
3274 | ||
3275 | /* | |
3276 | * Force memory writes to complete before letting h/w | |
3277 | * know there are new descriptors to fetch. (Only | |
3278 | * applicable for weak-ordered memory model archs, | |
3279 | * such as IA-64). | |
3280 | */ | |
3281 | wmb(); | |
3282 | ||
3283 | tx_ring->next_to_use = i; | |
3284 | writel(i, adapter->hw.hw_addr + tx_ring->tail); | |
3285 | } | |
3286 | ||
e092be60 AV |
3287 | static int __ixgbe_maybe_stop_tx(struct net_device *netdev, |
3288 | struct ixgbe_ring *tx_ring, int size) | |
3289 | { | |
3290 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3291 | ||
30eba97a | 3292 | netif_stop_subqueue(netdev, tx_ring->queue_index); |
e092be60 AV |
3293 | /* Herbert's original patch had: |
3294 | * smp_mb__after_netif_stop_queue(); | |
3295 | * but since that doesn't exist yet, just open code it. */ | |
3296 | smp_mb(); | |
3297 | ||
3298 | /* We need to check again in a case another CPU has just | |
3299 | * made room available. */ | |
3300 | if (likely(IXGBE_DESC_UNUSED(tx_ring) < size)) | |
3301 | return -EBUSY; | |
3302 | ||
3303 | /* A reprieve! - use start_queue because it doesn't call schedule */ | |
30eba97a | 3304 | netif_wake_subqueue(netdev, tx_ring->queue_index); |
e092be60 AV |
3305 | ++adapter->restart_queue; |
3306 | return 0; | |
3307 | } | |
3308 | ||
3309 | static int ixgbe_maybe_stop_tx(struct net_device *netdev, | |
3310 | struct ixgbe_ring *tx_ring, int size) | |
3311 | { | |
3312 | if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size)) | |
3313 | return 0; | |
3314 | return __ixgbe_maybe_stop_tx(netdev, tx_ring, size); | |
3315 | } | |
3316 | ||
3317 | ||
9a799d71 AK |
3318 | static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev) |
3319 | { | |
3320 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3321 | struct ixgbe_ring *tx_ring; | |
3322 | unsigned int len = skb->len; | |
3323 | unsigned int first; | |
3324 | unsigned int tx_flags = 0; | |
30eba97a AV |
3325 | u8 hdr_len = 0; |
3326 | int r_idx = 0, tso; | |
9a799d71 AK |
3327 | unsigned int mss = 0; |
3328 | int count = 0; | |
3329 | unsigned int f; | |
3330 | unsigned int nr_frags = skb_shinfo(skb)->nr_frags; | |
3331 | len -= skb->data_len; | |
30eba97a | 3332 | r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping; |
30eba97a | 3333 | tx_ring = &adapter->tx_ring[r_idx]; |
9a799d71 | 3334 | |
9a799d71 AK |
3335 | |
3336 | if (skb->len <= 0) { | |
3337 | dev_kfree_skb(skb); | |
3338 | return NETDEV_TX_OK; | |
3339 | } | |
3340 | mss = skb_shinfo(skb)->gso_size; | |
3341 | ||
3342 | if (mss) | |
3343 | count++; | |
3344 | else if (skb->ip_summed == CHECKSUM_PARTIAL) | |
3345 | count++; | |
3346 | ||
3347 | count += TXD_USE_COUNT(len); | |
3348 | for (f = 0; f < nr_frags; f++) | |
3349 | count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); | |
3350 | ||
e092be60 | 3351 | if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) { |
9a799d71 | 3352 | adapter->tx_busy++; |
9a799d71 AK |
3353 | return NETDEV_TX_BUSY; |
3354 | } | |
9a799d71 AK |
3355 | if (adapter->vlgrp && vlan_tx_tag_present(skb)) { |
3356 | tx_flags |= IXGBE_TX_FLAGS_VLAN; | |
3357 | tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT); | |
3358 | } | |
3359 | ||
8327d000 | 3360 | if (skb->protocol == htons(ETH_P_IP)) |
9a799d71 AK |
3361 | tx_flags |= IXGBE_TX_FLAGS_IPV4; |
3362 | first = tx_ring->next_to_use; | |
3363 | tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len); | |
3364 | if (tso < 0) { | |
3365 | dev_kfree_skb_any(skb); | |
3366 | return NETDEV_TX_OK; | |
3367 | } | |
3368 | ||
3369 | if (tso) | |
3370 | tx_flags |= IXGBE_TX_FLAGS_TSO; | |
3371 | else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) && | |
3372 | (skb->ip_summed == CHECKSUM_PARTIAL)) | |
3373 | tx_flags |= IXGBE_TX_FLAGS_CSUM; | |
3374 | ||
3375 | ixgbe_tx_queue(adapter, tx_ring, tx_flags, | |
3376 | ixgbe_tx_map(adapter, tx_ring, skb, first), | |
3377 | skb->len, hdr_len); | |
3378 | ||
3379 | netdev->trans_start = jiffies; | |
3380 | ||
e092be60 | 3381 | ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED); |
9a799d71 AK |
3382 | |
3383 | return NETDEV_TX_OK; | |
3384 | } | |
3385 | ||
3386 | /** | |
3387 | * ixgbe_get_stats - Get System Network Statistics | |
3388 | * @netdev: network interface device structure | |
3389 | * | |
3390 | * Returns the address of the device statistics structure. | |
3391 | * The statistics are actually updated from the timer callback. | |
3392 | **/ | |
3393 | static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev) | |
3394 | { | |
3395 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3396 | ||
3397 | /* only return the current stats */ | |
3398 | return &adapter->net_stats; | |
3399 | } | |
3400 | ||
3401 | /** | |
3402 | * ixgbe_set_mac - Change the Ethernet Address of the NIC | |
3403 | * @netdev: network interface device structure | |
3404 | * @p: pointer to an address structure | |
3405 | * | |
3406 | * Returns 0 on success, negative on failure | |
3407 | **/ | |
3408 | static int ixgbe_set_mac(struct net_device *netdev, void *p) | |
3409 | { | |
3410 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3411 | struct sockaddr *addr = p; | |
3412 | ||
3413 | if (!is_valid_ether_addr(addr->sa_data)) | |
3414 | return -EADDRNOTAVAIL; | |
3415 | ||
3416 | memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); | |
3417 | memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len); | |
3418 | ||
3419 | ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV); | |
3420 | ||
3421 | return 0; | |
3422 | } | |
3423 | ||
3424 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
3425 | /* | |
3426 | * Polling 'interrupt' - used by things like netconsole to send skbs | |
3427 | * without having to re-enable interrupts. It's not called while | |
3428 | * the interrupt routine is executing. | |
3429 | */ | |
3430 | static void ixgbe_netpoll(struct net_device *netdev) | |
3431 | { | |
3432 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3433 | ||
3434 | disable_irq(adapter->pdev->irq); | |
3435 | adapter->flags |= IXGBE_FLAG_IN_NETPOLL; | |
3436 | ixgbe_intr(adapter->pdev->irq, netdev); | |
3437 | adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL; | |
3438 | enable_irq(adapter->pdev->irq); | |
3439 | } | |
3440 | #endif | |
3441 | ||
021230d4 AV |
3442 | /** |
3443 | * ixgbe_napi_add_all - prep napi structs for use | |
3444 | * @adapter: private struct | |
3445 | * helper function to napi_add each possible q_vector->napi | |
3446 | */ | |
3447 | static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter) | |
3448 | { | |
3449 | int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS; | |
3450 | int (*poll)(struct napi_struct *, int); | |
3451 | ||
3452 | if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) { | |
3453 | poll = &ixgbe_clean_rxonly; | |
3454 | } else { | |
3455 | poll = &ixgbe_poll; | |
3456 | /* only one q_vector for legacy modes */ | |
3457 | q_vectors = 1; | |
3458 | } | |
3459 | ||
3460 | for (i = 0; i < q_vectors; i++) { | |
3461 | struct ixgbe_q_vector *q_vector = &adapter->q_vector[i]; | |
3462 | netif_napi_add(adapter->netdev, &q_vector->napi, | |
3463 | (*poll), 64); | |
3464 | } | |
3465 | } | |
3466 | ||
9a799d71 AK |
3467 | /** |
3468 | * ixgbe_probe - Device Initialization Routine | |
3469 | * @pdev: PCI device information struct | |
3470 | * @ent: entry in ixgbe_pci_tbl | |
3471 | * | |
3472 | * Returns 0 on success, negative on failure | |
3473 | * | |
3474 | * ixgbe_probe initializes an adapter identified by a pci_dev structure. | |
3475 | * The OS initialization, configuring of the adapter private structure, | |
3476 | * and a hardware reset occur. | |
3477 | **/ | |
3478 | static int __devinit ixgbe_probe(struct pci_dev *pdev, | |
3479 | const struct pci_device_id *ent) | |
3480 | { | |
3481 | struct net_device *netdev; | |
3482 | struct ixgbe_adapter *adapter = NULL; | |
3483 | struct ixgbe_hw *hw; | |
3484 | const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data]; | |
3485 | unsigned long mmio_start, mmio_len; | |
3486 | static int cards_found; | |
3487 | int i, err, pci_using_dac; | |
3488 | u16 link_status, link_speed, link_width; | |
3489 | u32 part_num; | |
3490 | ||
3491 | err = pci_enable_device(pdev); | |
3492 | if (err) | |
3493 | return err; | |
3494 | ||
3495 | if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) && | |
3496 | !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) { | |
3497 | pci_using_dac = 1; | |
3498 | } else { | |
3499 | err = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
3500 | if (err) { | |
3501 | err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
3502 | if (err) { | |
3503 | dev_err(&pdev->dev, "No usable DMA " | |
3504 | "configuration, aborting\n"); | |
3505 | goto err_dma; | |
3506 | } | |
3507 | } | |
3508 | pci_using_dac = 0; | |
3509 | } | |
3510 | ||
3511 | err = pci_request_regions(pdev, ixgbe_driver_name); | |
3512 | if (err) { | |
3513 | dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err); | |
3514 | goto err_pci_reg; | |
3515 | } | |
3516 | ||
3517 | pci_set_master(pdev); | |
fb3b27bc | 3518 | pci_save_state(pdev); |
9a799d71 | 3519 | |
30eba97a | 3520 | netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES); |
9a799d71 AK |
3521 | if (!netdev) { |
3522 | err = -ENOMEM; | |
3523 | goto err_alloc_etherdev; | |
3524 | } | |
3525 | ||
9a799d71 AK |
3526 | SET_NETDEV_DEV(netdev, &pdev->dev); |
3527 | ||
3528 | pci_set_drvdata(pdev, netdev); | |
3529 | adapter = netdev_priv(netdev); | |
3530 | ||
3531 | adapter->netdev = netdev; | |
3532 | adapter->pdev = pdev; | |
3533 | hw = &adapter->hw; | |
3534 | hw->back = adapter; | |
3535 | adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1; | |
3536 | ||
3537 | mmio_start = pci_resource_start(pdev, 0); | |
3538 | mmio_len = pci_resource_len(pdev, 0); | |
3539 | ||
3540 | hw->hw_addr = ioremap(mmio_start, mmio_len); | |
3541 | if (!hw->hw_addr) { | |
3542 | err = -EIO; | |
3543 | goto err_ioremap; | |
3544 | } | |
3545 | ||
3546 | for (i = 1; i <= 5; i++) { | |
3547 | if (pci_resource_len(pdev, i) == 0) | |
3548 | continue; | |
3549 | } | |
3550 | ||
3551 | netdev->open = &ixgbe_open; | |
3552 | netdev->stop = &ixgbe_close; | |
3553 | netdev->hard_start_xmit = &ixgbe_xmit_frame; | |
3554 | netdev->get_stats = &ixgbe_get_stats; | |
2c5645cf CL |
3555 | netdev->set_rx_mode = &ixgbe_set_rx_mode; |
3556 | netdev->set_multicast_list = &ixgbe_set_rx_mode; | |
9a799d71 AK |
3557 | netdev->set_mac_address = &ixgbe_set_mac; |
3558 | netdev->change_mtu = &ixgbe_change_mtu; | |
3559 | ixgbe_set_ethtool_ops(netdev); | |
3560 | netdev->tx_timeout = &ixgbe_tx_timeout; | |
3561 | netdev->watchdog_timeo = 5 * HZ; | |
9a799d71 AK |
3562 | netdev->vlan_rx_register = ixgbe_vlan_rx_register; |
3563 | netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid; | |
3564 | netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid; | |
3565 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
3566 | netdev->poll_controller = ixgbe_netpoll; | |
3567 | #endif | |
3568 | strcpy(netdev->name, pci_name(pdev)); | |
3569 | ||
3570 | netdev->mem_start = mmio_start; | |
3571 | netdev->mem_end = mmio_start + mmio_len; | |
3572 | ||
3573 | adapter->bd_number = cards_found; | |
3574 | ||
3575 | /* PCI config space info */ | |
3576 | hw->vendor_id = pdev->vendor; | |
3577 | hw->device_id = pdev->device; | |
3578 | hw->revision_id = pdev->revision; | |
3579 | hw->subsystem_vendor_id = pdev->subsystem_vendor; | |
3580 | hw->subsystem_device_id = pdev->subsystem_device; | |
3581 | ||
3582 | /* Setup hw api */ | |
3583 | memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops)); | |
021230d4 | 3584 | hw->mac.type = ii->mac; |
9a799d71 AK |
3585 | |
3586 | err = ii->get_invariants(hw); | |
3587 | if (err) | |
3588 | goto err_hw_init; | |
3589 | ||
3590 | /* setup the private structure */ | |
3591 | err = ixgbe_sw_init(adapter); | |
3592 | if (err) | |
3593 | goto err_sw_init; | |
3594 | ||
3595 | netdev->features = NETIF_F_SG | | |
22f32b7a | 3596 | NETIF_F_IP_CSUM | |
9a799d71 AK |
3597 | NETIF_F_HW_VLAN_TX | |
3598 | NETIF_F_HW_VLAN_RX | | |
3599 | NETIF_F_HW_VLAN_FILTER; | |
3600 | ||
177db6ff | 3601 | netdev->features |= NETIF_F_LRO; |
9a799d71 | 3602 | netdev->features |= NETIF_F_TSO; |
9a799d71 | 3603 | netdev->features |= NETIF_F_TSO6; |
ad31c402 JK |
3604 | |
3605 | netdev->vlan_features |= NETIF_F_TSO; | |
3606 | netdev->vlan_features |= NETIF_F_TSO6; | |
22f32b7a | 3607 | netdev->vlan_features |= NETIF_F_IP_CSUM; |
ad31c402 JK |
3608 | netdev->vlan_features |= NETIF_F_SG; |
3609 | ||
9a799d71 AK |
3610 | if (pci_using_dac) |
3611 | netdev->features |= NETIF_F_HIGHDMA; | |
3612 | ||
9a799d71 AK |
3613 | /* make sure the EEPROM is good */ |
3614 | if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) { | |
3615 | dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n"); | |
3616 | err = -EIO; | |
3617 | goto err_eeprom; | |
3618 | } | |
3619 | ||
3620 | memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len); | |
3621 | memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len); | |
3622 | ||
3623 | if (ixgbe_validate_mac_addr(netdev->dev_addr)) { | |
3624 | err = -EIO; | |
3625 | goto err_eeprom; | |
3626 | } | |
3627 | ||
3628 | init_timer(&adapter->watchdog_timer); | |
3629 | adapter->watchdog_timer.function = &ixgbe_watchdog; | |
3630 | adapter->watchdog_timer.data = (unsigned long)adapter; | |
3631 | ||
3632 | INIT_WORK(&adapter->reset_task, ixgbe_reset_task); | |
3633 | ||
021230d4 AV |
3634 | err = ixgbe_init_interrupt_scheme(adapter); |
3635 | if (err) | |
3636 | goto err_sw_init; | |
9a799d71 AK |
3637 | |
3638 | /* print bus type/speed/width info */ | |
3639 | pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status); | |
3640 | link_speed = link_status & IXGBE_PCI_LINK_SPEED; | |
3641 | link_width = link_status & IXGBE_PCI_LINK_WIDTH; | |
3642 | dev_info(&pdev->dev, "(PCI Express:%s:%s) " | |
3643 | "%02x:%02x:%02x:%02x:%02x:%02x\n", | |
3644 | ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" : | |
3645 | (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" : | |
3646 | "Unknown"), | |
3647 | ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" : | |
3648 | (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" : | |
3649 | (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" : | |
3650 | (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" : | |
3651 | "Unknown"), | |
3652 | netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], | |
3653 | netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]); | |
3654 | ixgbe_read_part_num(hw, &part_num); | |
3655 | dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n", | |
3656 | hw->mac.type, hw->phy.type, | |
3657 | (part_num >> 8), (part_num & 0xff)); | |
3658 | ||
0c254d86 AK |
3659 | if (link_width <= IXGBE_PCI_LINK_WIDTH_4) { |
3660 | dev_warn(&pdev->dev, "PCI-Express bandwidth available for " | |
3661 | "this card is not sufficient for optimal " | |
3662 | "performance.\n"); | |
3663 | dev_warn(&pdev->dev, "For optimal performance a x8 " | |
3664 | "PCI-Express slot is required.\n"); | |
3665 | } | |
3666 | ||
9a799d71 AK |
3667 | /* reset the hardware with the new settings */ |
3668 | ixgbe_start_hw(hw); | |
3669 | ||
3670 | netif_carrier_off(netdev); | |
fd2ea0a7 | 3671 | netif_tx_stop_all_queues(netdev); |
9a799d71 | 3672 | |
021230d4 AV |
3673 | ixgbe_napi_add_all(adapter); |
3674 | ||
9a799d71 AK |
3675 | strcpy(netdev->name, "eth%d"); |
3676 | err = register_netdev(netdev); | |
3677 | if (err) | |
3678 | goto err_register; | |
3679 | ||
bd0362dd | 3680 | #ifdef CONFIG_DCA |
652f093f | 3681 | if (dca_add_requester(&pdev->dev) == 0) { |
bd0362dd JC |
3682 | adapter->flags |= IXGBE_FLAG_DCA_ENABLED; |
3683 | /* always use CB2 mode, difference is masked | |
3684 | * in the CB driver */ | |
3685 | IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2); | |
3686 | ixgbe_setup_dca(adapter); | |
3687 | } | |
3688 | #endif | |
9a799d71 AK |
3689 | |
3690 | dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n"); | |
3691 | cards_found++; | |
3692 | return 0; | |
3693 | ||
3694 | err_register: | |
5eba3699 | 3695 | ixgbe_release_hw_control(adapter); |
9a799d71 AK |
3696 | err_hw_init: |
3697 | err_sw_init: | |
021230d4 | 3698 | ixgbe_reset_interrupt_capability(adapter); |
9a799d71 AK |
3699 | err_eeprom: |
3700 | iounmap(hw->hw_addr); | |
3701 | err_ioremap: | |
3702 | free_netdev(netdev); | |
3703 | err_alloc_etherdev: | |
3704 | pci_release_regions(pdev); | |
3705 | err_pci_reg: | |
3706 | err_dma: | |
3707 | pci_disable_device(pdev); | |
3708 | return err; | |
3709 | } | |
3710 | ||
3711 | /** | |
3712 | * ixgbe_remove - Device Removal Routine | |
3713 | * @pdev: PCI device information struct | |
3714 | * | |
3715 | * ixgbe_remove is called by the PCI subsystem to alert the driver | |
3716 | * that it should release a PCI device. The could be caused by a | |
3717 | * Hot-Plug event, or because the driver is going to be removed from | |
3718 | * memory. | |
3719 | **/ | |
3720 | static void __devexit ixgbe_remove(struct pci_dev *pdev) | |
3721 | { | |
3722 | struct net_device *netdev = pci_get_drvdata(pdev); | |
3723 | struct ixgbe_adapter *adapter = netdev_priv(netdev); | |
3724 | ||
3725 | set_bit(__IXGBE_DOWN, &adapter->state); | |
3726 | del_timer_sync(&adapter->watchdog_timer); | |
3727 | ||
3728 | flush_scheduled_work(); | |
3729 | ||
bd0362dd JC |
3730 | #ifdef CONFIG_DCA |
3731 | if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) { | |
3732 | adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED; | |
3733 | dca_remove_requester(&pdev->dev); | |
3734 | IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1); | |
3735 | } | |
3736 | ||
3737 | #endif | |
9a799d71 AK |
3738 | unregister_netdev(netdev); |
3739 | ||
021230d4 | 3740 | ixgbe_reset_interrupt_capability(adapter); |
5eba3699 | 3741 | |
021230d4 | 3742 | ixgbe_release_hw_control(adapter); |
9a799d71 AK |
3743 | |
3744 | iounmap(adapter->hw.hw_addr); | |
3745 | pci_release_regions(pdev); | |
3746 | ||
021230d4 AV |
3747 | DPRINTK(PROBE, INFO, "complete\n"); |
3748 | kfree(adapter->tx_ring); | |
3749 | kfree(adapter->rx_ring); | |
3750 | ||
9a799d71 AK |
3751 | free_netdev(netdev); |
3752 | ||
3753 | pci_disable_device(pdev); | |
3754 | } | |
3755 | ||
3756 | /** | |
3757 | * ixgbe_io_error_detected - called when PCI error is detected | |
3758 | * @pdev: Pointer to PCI device | |
3759 | * @state: The current pci connection state | |
3760 | * | |
3761 | * This function is called after a PCI bus error affecting | |
3762 | * this device has been detected. | |
3763 | */ | |
3764 | static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev, | |
3765 | pci_channel_state_t state) | |
3766 | { | |
3767 | struct net_device *netdev = pci_get_drvdata(pdev); | |
3768 | struct ixgbe_adapter *adapter = netdev->priv; | |
3769 | ||
3770 | netif_device_detach(netdev); | |
3771 | ||
3772 | if (netif_running(netdev)) | |
3773 | ixgbe_down(adapter); | |
3774 | pci_disable_device(pdev); | |
3775 | ||
3776 | /* Request a slot slot reset. */ | |
3777 | return PCI_ERS_RESULT_NEED_RESET; | |
3778 | } | |
3779 | ||
3780 | /** | |
3781 | * ixgbe_io_slot_reset - called after the pci bus has been reset. | |
3782 | * @pdev: Pointer to PCI device | |
3783 | * | |
3784 | * Restart the card from scratch, as if from a cold-boot. | |
3785 | */ | |
3786 | static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev) | |
3787 | { | |
3788 | struct net_device *netdev = pci_get_drvdata(pdev); | |
3789 | struct ixgbe_adapter *adapter = netdev->priv; | |
3790 | ||
3791 | if (pci_enable_device(pdev)) { | |
3792 | DPRINTK(PROBE, ERR, | |
3793 | "Cannot re-enable PCI device after reset.\n"); | |
3794 | return PCI_ERS_RESULT_DISCONNECT; | |
3795 | } | |
3796 | pci_set_master(pdev); | |
fb3b27bc | 3797 | pci_restore_state(pdev); |
9a799d71 AK |
3798 | |
3799 | pci_enable_wake(pdev, PCI_D3hot, 0); | |
3800 | pci_enable_wake(pdev, PCI_D3cold, 0); | |
3801 | ||
3802 | ixgbe_reset(adapter); | |
3803 | ||
3804 | return PCI_ERS_RESULT_RECOVERED; | |
3805 | } | |
3806 | ||
3807 | /** | |
3808 | * ixgbe_io_resume - called when traffic can start flowing again. | |
3809 | * @pdev: Pointer to PCI device | |
3810 | * | |
3811 | * This callback is called when the error recovery driver tells us that | |
3812 | * its OK to resume normal operation. | |
3813 | */ | |
3814 | static void ixgbe_io_resume(struct pci_dev *pdev) | |
3815 | { | |
3816 | struct net_device *netdev = pci_get_drvdata(pdev); | |
3817 | struct ixgbe_adapter *adapter = netdev->priv; | |
3818 | ||
3819 | if (netif_running(netdev)) { | |
3820 | if (ixgbe_up(adapter)) { | |
3821 | DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n"); | |
3822 | return; | |
3823 | } | |
3824 | } | |
3825 | ||
3826 | netif_device_attach(netdev); | |
3827 | ||
3828 | } | |
3829 | ||
3830 | static struct pci_error_handlers ixgbe_err_handler = { | |
3831 | .error_detected = ixgbe_io_error_detected, | |
3832 | .slot_reset = ixgbe_io_slot_reset, | |
3833 | .resume = ixgbe_io_resume, | |
3834 | }; | |
3835 | ||
3836 | static struct pci_driver ixgbe_driver = { | |
3837 | .name = ixgbe_driver_name, | |
3838 | .id_table = ixgbe_pci_tbl, | |
3839 | .probe = ixgbe_probe, | |
3840 | .remove = __devexit_p(ixgbe_remove), | |
3841 | #ifdef CONFIG_PM | |
3842 | .suspend = ixgbe_suspend, | |
3843 | .resume = ixgbe_resume, | |
3844 | #endif | |
3845 | .shutdown = ixgbe_shutdown, | |
3846 | .err_handler = &ixgbe_err_handler | |
3847 | }; | |
3848 | ||
3849 | /** | |
3850 | * ixgbe_init_module - Driver Registration Routine | |
3851 | * | |
3852 | * ixgbe_init_module is the first routine called when the driver is | |
3853 | * loaded. All it does is register with the PCI subsystem. | |
3854 | **/ | |
3855 | static int __init ixgbe_init_module(void) | |
3856 | { | |
3857 | int ret; | |
3858 | printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name, | |
3859 | ixgbe_driver_string, ixgbe_driver_version); | |
3860 | ||
3861 | printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright); | |
3862 | ||
bd0362dd JC |
3863 | #ifdef CONFIG_DCA |
3864 | dca_register_notify(&dca_notifier); | |
3865 | ||
3866 | #endif | |
9a799d71 AK |
3867 | ret = pci_register_driver(&ixgbe_driver); |
3868 | return ret; | |
3869 | } | |
3870 | module_init(ixgbe_init_module); | |
3871 | ||
3872 | /** | |
3873 | * ixgbe_exit_module - Driver Exit Cleanup Routine | |
3874 | * | |
3875 | * ixgbe_exit_module is called just before the driver is removed | |
3876 | * from memory. | |
3877 | **/ | |
3878 | static void __exit ixgbe_exit_module(void) | |
3879 | { | |
bd0362dd JC |
3880 | #ifdef CONFIG_DCA |
3881 | dca_unregister_notify(&dca_notifier); | |
3882 | #endif | |
9a799d71 AK |
3883 | pci_unregister_driver(&ixgbe_driver); |
3884 | } | |
bd0362dd JC |
3885 | |
3886 | #ifdef CONFIG_DCA | |
3887 | static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event, | |
3888 | void *p) | |
3889 | { | |
3890 | int ret_val; | |
3891 | ||
3892 | ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event, | |
3893 | __ixgbe_notify_dca); | |
3894 | ||
3895 | return ret_val ? NOTIFY_BAD : NOTIFY_DONE; | |
3896 | } | |
3897 | #endif /* CONFIG_DCA */ | |
3898 | ||
9a799d71 AK |
3899 | module_exit(ixgbe_exit_module); |
3900 | ||
3901 | /* ixgbe_main.c */ |