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Merge tag 'for-4.2' of git://git.infradead.org/battery-2.6
[mirror_ubuntu-focal-kernel.git] / drivers / net / ethernet / cisco / enic / enic_main.c
CommitLineData
01f2e4ea 1/*
29046f9b 2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
01f2e4ea
SF		 3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/errno.h>
24#include <linux/types.h>
25#include <linux/init.h>
a6b7a407 26#include <linux/interrupt.h>
01f2e4ea
SF		 27#include <linux/workqueue.h>
28#include <linux/pci.h>
29#include <linux/netdevice.h>
30#include <linux/etherdevice.h>
01789349 31#include <linux/if.h>
01f2e4ea
SF		 32#include <linux/if_ether.h>
33#include <linux/if_vlan.h>
01f2e4ea
SF		 34#include <linux/in.h>
35#include <linux/ip.h>
36#include <linux/ipv6.h>
37#include <linux/tcp.h>
29046f9b 38#include <linux/rtnetlink.h>
70c71606 39#include <linux/prefetch.h>
b7c6bfb7 40#include <net/ip6_checksum.h>
7c2ce6e6 41#include <linux/ktime.h>
b6e97c13
GV		 42#ifdef CONFIG_RFS_ACCEL
43#include <linux/cpu_rmap.h>
44#endif
14747cd9
GV		 45#ifdef CONFIG_NET_RX_BUSY_POLL
46#include <net/busy_poll.h>
47#endif
3f255dcc 48#include <linux/crash_dump.h>
01f2e4ea
SF		 49
50#include "cq_enet_desc.h"
51#include "vnic_dev.h"
52#include "vnic_intr.h"
53#include "vnic_stats.h"
f8bd9091 54#include "vnic_vic.h"
01f2e4ea
SF		 55#include "enic_res.h"
56#include "enic.h"
51987461 57#include "enic_dev.h"
b3abfbd2 58#include "enic_pp.h"
a145df23 59#include "enic_clsf.h"
01f2e4ea
SF		 60
61#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
ea0d7d91
SF		 62#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
63#define MAX_TSO (1 << 16)
64#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
65
66#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
f8bd9091 67#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
3a4adef5 68#define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
01f2e4ea 69
a03bb56e
GV		 70#define RX_COPYBREAK_DEFAULT 256
71
01f2e4ea 72/* Supported devices */
9baa3c34 73static const struct pci_device_id enic_id_table[] = {
ea0d7d91 74 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
f8bd9091 75 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
3a4adef5 76 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
01f2e4ea
SF		 77 { 0, } /* end of table */
78};
79
80MODULE_DESCRIPTION(DRV_DESCRIPTION);
81MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
82MODULE_LICENSE("GPL");
83MODULE_VERSION(DRV_VERSION);
84MODULE_DEVICE_TABLE(pci, enic_id_table);
85
7c2ce6e6
SS		 86#define ENIC_LARGE_PKT_THRESHOLD 1000
87#define ENIC_MAX_COALESCE_TIMERS 10
88/* Interrupt moderation table, which will be used to decide the
89 * coalescing timer values
90 * {rx_rate in Mbps, mapping percentage of the range}
91 */
57ae84a0 92static struct enic_intr_mod_table mod_table[ENIC_MAX_COALESCE_TIMERS + 1] = {
7c2ce6e6
SS		 93 {4000, 0},
94 {4400, 10},
95 {5060, 20},
96 {5230, 30},
97 {5540, 40},
98 {5820, 50},
99 {6120, 60},
100 {6435, 70},
101 {6745, 80},
102 {7000, 90},
103 {0xFFFFFFFF, 100}
104};
105
106/* This table helps the driver to pick different ranges for rx coalescing
107 * timer depending on the link speed.
108 */
57ae84a0 109static struct enic_intr_mod_range mod_range[ENIC_MAX_LINK_SPEEDS] = {
7c2ce6e6
SS		 110 {0, 0}, /* 0 - 4 Gbps */
111 {0, 3}, /* 4 - 10 Gbps */
112 {3, 6}, /* 10 - 40 Gbps */
113};
114
3f192795 115int enic_is_dynamic(struct enic *enic)
f8bd9091
SF		 116{
117 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
118}
119
8749b427
RP		 120int enic_sriov_enabled(struct enic *enic)
121{
122 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
123}
124
3a4adef5
RP		 125static int enic_is_sriov_vf(struct enic *enic)
126{
127 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
128}
129
889d13f5
RP		 130int enic_is_valid_vf(struct enic *enic, int vf)
131{
132#ifdef CONFIG_PCI_IOV
133 return vf >= 0 && vf < enic->num_vfs;
134#else
135 return 0;
136#endif
137}
138
01f2e4ea
SF		 139static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
140{
141 struct enic *enic = vnic_dev_priv(wq->vdev);
142
143 if (buf->sop)
144 pci_unmap_single(enic->pdev, buf->dma_addr,
145 buf->len, PCI_DMA_TODEVICE);
146 else
147 pci_unmap_page(enic->pdev, buf->dma_addr,
148 buf->len, PCI_DMA_TODEVICE);
149
150 if (buf->os_buf)
151 dev_kfree_skb_any(buf->os_buf);
152}
153
154static void enic_wq_free_buf(struct vnic_wq *wq,
155 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
156{
157 enic_free_wq_buf(wq, buf);
158}
159
160static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
161 u8 type, u16 q_number, u16 completed_index, void *opaque)
162{
163 struct enic *enic = vnic_dev_priv(vdev);
164
165 spin_lock(&enic->wq_lock[q_number]);
166
167 vnic_wq_service(&enic->wq[q_number], cq_desc,
168 completed_index, enic_wq_free_buf,
169 opaque);
170
822473b6 171 if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
ea0d7d91
SF		 172 vnic_wq_desc_avail(&enic->wq[q_number]) >=
173 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
822473b6 174 netif_wake_subqueue(enic->netdev, q_number);
01f2e4ea
SF		 175
176 spin_unlock(&enic->wq_lock[q_number]);
177
178 return 0;
179}
180
181static void enic_log_q_error(struct enic *enic)
182{
183 unsigned int i;
184 u32 error_status;
185
186 for (i = 0; i < enic->wq_count; i++) {
187 error_status = vnic_wq_error_status(&enic->wq[i]);
188 if (error_status)
a7a79deb
VK		 189 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
190 i, error_status);
01f2e4ea
SF		 191 }
192
193 for (i = 0; i < enic->rq_count; i++) {
194 error_status = vnic_rq_error_status(&enic->rq[i]);
195 if (error_status)
a7a79deb
VK		 196 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
197 i, error_status);
01f2e4ea
SF		 198 }
199}
200
383ab92f 201static void enic_msglvl_check(struct enic *enic)
01f2e4ea 202{
383ab92f 203 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
01f2e4ea 204
383ab92f 205 if (msg_enable != enic->msg_enable) {
a7a79deb
VK		 206 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
207 enic->msg_enable, msg_enable);
383ab92f 208 enic->msg_enable = msg_enable;
01f2e4ea
SF		 209 }
210}
211
212static void enic_mtu_check(struct enic *enic)
213{
214 u32 mtu = vnic_dev_mtu(enic->vdev);
a7a79deb 215 struct net_device *netdev = enic->netdev;
01f2e4ea 216
491598a4 217 if (mtu && mtu != enic->port_mtu) {
7c844599 218 enic->port_mtu = mtu;
7335903c 219 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
c97c894d
RP		 220 mtu = max_t(int, ENIC_MIN_MTU,
221 min_t(int, ENIC_MAX_MTU, mtu));
222 if (mtu != netdev->mtu)
223 schedule_work(&enic->change_mtu_work);
224 } else {
225 if (mtu < netdev->mtu)
226 netdev_warn(netdev,
227 "interface MTU (%d) set higher "
228 "than switch port MTU (%d)\n",
229 netdev->mtu, mtu);
230 }
01f2e4ea
SF		 231 }
232}
233
383ab92f 234static void enic_link_check(struct enic *enic)
01f2e4ea 235{
383ab92f
VK		 236 int link_status = vnic_dev_link_status(enic->vdev);
237 int carrier_ok = netif_carrier_ok(enic->netdev);
01f2e4ea 238
383ab92f 239 if (link_status && !carrier_ok) {
a7a79deb 240 netdev_info(enic->netdev, "Link UP\n");
383ab92f
VK		 241 netif_carrier_on(enic->netdev);
242 } else if (!link_status && carrier_ok) {
a7a79deb 243 netdev_info(enic->netdev, "Link DOWN\n");
383ab92f 244 netif_carrier_off(enic->netdev);
01f2e4ea
SF		 245 }
246}
247
248static void enic_notify_check(struct enic *enic)
249{
250 enic_msglvl_check(enic);
251 enic_mtu_check(enic);
252 enic_link_check(enic);
253}
254
255#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
256
257static irqreturn_t enic_isr_legacy(int irq, void *data)
258{
259 struct net_device *netdev = data;
260 struct enic *enic = netdev_priv(netdev);
717258ba
VK		 261 unsigned int io_intr = enic_legacy_io_intr();
262 unsigned int err_intr = enic_legacy_err_intr();
263 unsigned int notify_intr = enic_legacy_notify_intr();
01f2e4ea
SF		 264 u32 pba;
265
717258ba 266 vnic_intr_mask(&enic->intr[io_intr]);
01f2e4ea
SF		 267
268 pba = vnic_intr_legacy_pba(enic->legacy_pba);
269 if (!pba) {
717258ba 270 vnic_intr_unmask(&enic->intr[io_intr]);
01f2e4ea
SF		 271 return IRQ_NONE; /* not our interrupt */
272 }
273
717258ba 274 if (ENIC_TEST_INTR(pba, notify_intr)) {
01f2e4ea 275 enic_notify_check(enic);
2b0c2e2d 276 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
ed8af6b2 277 }
01f2e4ea 278
717258ba
VK		 279 if (ENIC_TEST_INTR(pba, err_intr)) {
280 vnic_intr_return_all_credits(&enic->intr[err_intr]);
01f2e4ea
SF		 281 enic_log_q_error(enic);
282 /* schedule recovery from WQ/RQ error */
283 schedule_work(&enic->reset);
284 return IRQ_HANDLED;
285 }
286
db40b3f5
GV		 287 if (ENIC_TEST_INTR(pba, io_intr))
288 napi_schedule_irqoff(&enic->napi[0]);
289 else
717258ba 290 vnic_intr_unmask(&enic->intr[io_intr]);
01f2e4ea
SF		 291
292 return IRQ_HANDLED;
293}
294
295static irqreturn_t enic_isr_msi(int irq, void *data)
296{
297 struct enic *enic = data;
298
299 /* With MSI, there is no sharing of interrupts, so this is
300 * our interrupt and there is no need to ack it. The device
301 * is not providing per-vector masking, so the OS will not
302 * write to PCI config space to mask/unmask the interrupt.
303 * We're using mask_on_assertion for MSI, so the device
304 * automatically masks the interrupt when the interrupt is
305 * generated. Later, when exiting polling, the interrupt
306 * will be unmasked (see enic_poll).
307 *
308 * Also, the device uses the same PCIe Traffic Class (TC)
309 * for Memory Write data and MSI, so there are no ordering
310 * issues; the MSI will always arrive at the Root Complex
311 * _after_ corresponding Memory Writes (i.e. descriptor
312 * writes).
313 */
314
db40b3f5 315 napi_schedule_irqoff(&enic->napi[0]);
01f2e4ea
SF		 316
317 return IRQ_HANDLED;
318}
319
4cfe8785 320static irqreturn_t enic_isr_msix(int irq, void *data)
01f2e4ea 321{
717258ba 322 struct napi_struct *napi = data;
01f2e4ea 323
db40b3f5 324 napi_schedule_irqoff(napi);
01f2e4ea
SF		 325
326 return IRQ_HANDLED;
327}
328
01f2e4ea
SF		 329static irqreturn_t enic_isr_msix_err(int irq, void *data)
330{
331 struct enic *enic = data;
717258ba 332 unsigned int intr = enic_msix_err_intr(enic);
01f2e4ea 333
717258ba 334 vnic_intr_return_all_credits(&enic->intr[intr]);
ed8af6b2 335
01f2e4ea
SF		 336 enic_log_q_error(enic);
337
338 /* schedule recovery from WQ/RQ error */
339 schedule_work(&enic->reset);
340
341 return IRQ_HANDLED;
342}
343
344static irqreturn_t enic_isr_msix_notify(int irq, void *data)
345{
346 struct enic *enic = data;
717258ba 347 unsigned int intr = enic_msix_notify_intr(enic);
01f2e4ea
SF		 348
349 enic_notify_check(enic);
2b0c2e2d 350 vnic_intr_return_all_credits(&enic->intr[intr]);
01f2e4ea
SF		 351
352 return IRQ_HANDLED;
353}
354
065df159
GV		 355static int enic_queue_wq_skb_cont(struct enic *enic, struct vnic_wq *wq,
356 struct sk_buff *skb, unsigned int len_left,
357 int loopback)
01f2e4ea 358{
9e903e08 359 const skb_frag_t *frag;
065df159 360 dma_addr_t dma_addr;
01f2e4ea
SF		 361
362 /* Queue additional data fragments */
363 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
9e903e08 364 len_left -= skb_frag_size(frag);
065df159
GV		 365 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag, 0,
366 skb_frag_size(frag),
367 DMA_TO_DEVICE);
368 if (unlikely(enic_dma_map_check(enic, dma_addr)))
369 return -ENOMEM;
370 enic_queue_wq_desc_cont(wq, skb, dma_addr, skb_frag_size(frag),
371 (len_left == 0), /* EOP? */
372 loopback);
01f2e4ea 373 }
065df159
GV		 374
375 return 0;
01f2e4ea
SF		 376}
377
065df159
GV		 378static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
379 struct sk_buff *skb, int vlan_tag_insert,
380 unsigned int vlan_tag, int loopback)
01f2e4ea
SF		 381{
382 unsigned int head_len = skb_headlen(skb);
383 unsigned int len_left = skb->len - head_len;
384 int eop = (len_left == 0);
065df159
GV		 385 dma_addr_t dma_addr;
386 int err = 0;
387
388 dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
389 PCI_DMA_TODEVICE);
390 if (unlikely(enic_dma_map_check(enic, dma_addr)))
391 return -ENOMEM;
01f2e4ea 392
ea0d7d91
SF		 393 /* Queue the main skb fragment. The fragments are no larger
394 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
395 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
396 * per fragment is queued.
397 */
065df159
GV		 398 enic_queue_wq_desc(wq, skb, dma_addr, head_len, vlan_tag_insert,
399 vlan_tag, eop, loopback);
01f2e4ea
SF		 400
401 if (!eop)
065df159
GV		 402 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
403
404 return err;
01f2e4ea
SF		 405}
406
065df159
GV		 407static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
408 struct sk_buff *skb, int vlan_tag_insert,
409 unsigned int vlan_tag, int loopback)
01f2e4ea
SF		 410{
411 unsigned int head_len = skb_headlen(skb);
412 unsigned int len_left = skb->len - head_len;
0d0b1672 413 unsigned int hdr_len = skb_checksum_start_offset(skb);
01f2e4ea
SF		 414 unsigned int csum_offset = hdr_len + skb->csum_offset;
415 int eop = (len_left == 0);
065df159
GV		 416 dma_addr_t dma_addr;
417 int err = 0;
418
419 dma_addr = pci_map_single(enic->pdev, skb->data, head_len,
420 PCI_DMA_TODEVICE);
421 if (unlikely(enic_dma_map_check(enic, dma_addr)))
422 return -ENOMEM;
01f2e4ea 423
ea0d7d91
SF		 424 /* Queue the main skb fragment. The fragments are no larger
425 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
426 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
427 * per fragment is queued.
428 */
065df159
GV		 429 enic_queue_wq_desc_csum_l4(wq, skb, dma_addr, head_len, csum_offset,
430 hdr_len, vlan_tag_insert, vlan_tag, eop,
431 loopback);
01f2e4ea
SF		 432
433 if (!eop)
065df159
GV		 434 err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
435
436 return err;
01f2e4ea
SF		 437}
438
065df159
GV		 439static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
440 struct sk_buff *skb, unsigned int mss,
441 int vlan_tag_insert, unsigned int vlan_tag,
442 int loopback)
01f2e4ea 443{
ea0d7d91
SF		 444 unsigned int frag_len_left = skb_headlen(skb);
445 unsigned int len_left = skb->len - frag_len_left;
01f2e4ea
SF		 446 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
447 int eop = (len_left == 0);
ea0d7d91
SF		 448 unsigned int len;
449 dma_addr_t dma_addr;
450 unsigned int offset = 0;
451 skb_frag_t *frag;
01f2e4ea
SF		 452
453 /* Preload TCP csum field with IP pseudo hdr calculated
454 * with IP length set to zero. HW will later add in length
455 * to each TCP segment resulting from the TSO.
456 */
457
09640e63 458 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
01f2e4ea
SF		 459 ip_hdr(skb)->check = 0;
460 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
461 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
09640e63 462 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
01f2e4ea
SF		 463 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
464 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
465 }
466
ea0d7d91
SF		 467 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
468 * for the main skb fragment
469 */
470 while (frag_len_left) {
471 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
065df159
GV		 472 dma_addr = pci_map_single(enic->pdev, skb->data + offset, len,
473 PCI_DMA_TODEVICE);
474 if (unlikely(enic_dma_map_check(enic, dma_addr)))
475 return -ENOMEM;
476 enic_queue_wq_desc_tso(wq, skb, dma_addr, len, mss, hdr_len,
477 vlan_tag_insert, vlan_tag,
478 eop && (len == frag_len_left), loopback);
ea0d7d91
SF		 479 frag_len_left -= len;
480 offset += len;
481 }
01f2e4ea 482
ea0d7d91 483 if (eop)
065df159 484 return 0;
ea0d7d91
SF		 485
486 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
487 * for additional data fragments
488 */
489 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
9e903e08
ED		 490 len_left -= skb_frag_size(frag);
491 frag_len_left = skb_frag_size(frag);
4bf5adbf 492 offset = 0;
ea0d7d91
SF		 493
494 while (frag_len_left) {
495 len = min(frag_len_left,
496 (unsigned int)WQ_ENET_MAX_DESC_LEN);
4bf5adbf
IC		 497 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
498 offset, len,
5d6bcdfe 499 DMA_TO_DEVICE);
065df159
GV		 500 if (unlikely(enic_dma_map_check(enic, dma_addr)))
501 return -ENOMEM;
502 enic_queue_wq_desc_cont(wq, skb, dma_addr, len,
503 (len_left == 0) &&
504 (len == frag_len_left),/*EOP*/
505 loopback);
ea0d7d91
SF		 506 frag_len_left -= len;
507 offset += len;
508 }
509 }
065df159
GV		 510
511 return 0;
01f2e4ea
SF		 512}
513
514static inline void enic_queue_wq_skb(struct enic *enic,
515 struct vnic_wq *wq, struct sk_buff *skb)
516{
517 unsigned int mss = skb_shinfo(skb)->gso_size;
518 unsigned int vlan_tag = 0;
519 int vlan_tag_insert = 0;
1825aca6 520 int loopback = 0;
065df159 521 int err;
01f2e4ea 522
df8a39de 523 if (skb_vlan_tag_present(skb)) {
01f2e4ea
SF		 524 /* VLAN tag from trunking driver */
525 vlan_tag_insert = 1;
df8a39de 526 vlan_tag = skb_vlan_tag_get(skb);
1825aca6
VK		 527 } else if (enic->loop_enable) {
528 vlan_tag = enic->loop_tag;
529 loopback = 1;
01f2e4ea
SF		 530 }
531
532 if (mss)
065df159
GV		 533 err = enic_queue_wq_skb_tso(enic, wq, skb, mss,
534 vlan_tag_insert, vlan_tag,
535 loopback);
01f2e4ea 536 else if (skb->ip_summed == CHECKSUM_PARTIAL)
065df159
GV		 537 err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
538 vlan_tag, loopback);
01f2e4ea 539 else
065df159
GV		 540 err = enic_queue_wq_skb_vlan(enic, wq, skb, vlan_tag_insert,
541 vlan_tag, loopback);
542 if (unlikely(err)) {
543 struct vnic_wq_buf *buf;
544
545 buf = wq->to_use->prev;
546 /* while not EOP of previous pkt && queue not empty.
547 * For all non EOP bufs, os_buf is NULL.
548 */
549 while (!buf->os_buf && (buf->next != wq->to_clean)) {
550 enic_free_wq_buf(wq, buf);
551 wq->ring.desc_avail++;
552 buf = buf->prev;
553 }
554 wq->to_use = buf->next;
555 dev_kfree_skb(skb);
556 }
01f2e4ea
SF		 557}
558
ed8af6b2 559/* netif_tx_lock held, process context with BHs disabled, or BH */
61357325 560static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
d87fd25d 561 struct net_device *netdev)
01f2e4ea
SF		 562{
563 struct enic *enic = netdev_priv(netdev);
822473b6 564 struct vnic_wq *wq;
822473b6 565 unsigned int txq_map;
f8e34d24 566 struct netdev_queue *txq;
01f2e4ea
SF		 567
568 if (skb->len <= 0) {
98d8a65d 569 dev_kfree_skb_any(skb);
01f2e4ea
SF		 570 return NETDEV_TX_OK;
571 }
572
822473b6 573 txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
574 wq = &enic->wq[txq_map];
f8e34d24 575 txq = netdev_get_tx_queue(netdev, txq_map);
822473b6 576
01f2e4ea
SF		 577 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
578 * which is very likely. In the off chance it's going to take
579 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
580 */
581
582 if (skb_shinfo(skb)->gso_size == 0 &&
583 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
584 skb_linearize(skb)) {
98d8a65d 585 dev_kfree_skb_any(skb);
01f2e4ea
SF		 586 return NETDEV_TX_OK;
587 }
588
78e2045d 589 spin_lock(&enic->wq_lock[txq_map]);
01f2e4ea 590
ea0d7d91
SF		 591 if (vnic_wq_desc_avail(wq) <
592 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
f8e34d24 593 netif_tx_stop_queue(txq);
01f2e4ea 594 /* This is a hard error, log it */
a7a79deb 595 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
78e2045d 596 spin_unlock(&enic->wq_lock[txq_map]);
01f2e4ea
SF		 597 return NETDEV_TX_BUSY;
598 }
599
600 enic_queue_wq_skb(enic, wq, skb);
601
ea0d7d91 602 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
f8e34d24
GV		 603 netif_tx_stop_queue(txq);
604 if (!skb->xmit_more || netif_xmit_stopped(txq))
605 vnic_wq_doorbell(wq);
01f2e4ea 606
78e2045d 607 spin_unlock(&enic->wq_lock[txq_map]);
01f2e4ea
SF		 608
609 return NETDEV_TX_OK;
610}
611
612/* dev_base_lock rwlock held, nominally process context */
f20530bc 613static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
614 struct rtnl_link_stats64 *net_stats)
01f2e4ea
SF		 615{
616 struct enic *enic = netdev_priv(netdev);
617 struct vnic_stats *stats;
19b596bd 618 int err;
01f2e4ea 619
19b596bd
GV		 620 err = enic_dev_stats_dump(enic, &stats);
621 /* return only when pci_zalloc_consistent fails in vnic_dev_stats_dump
622 * For other failures, like devcmd failure, we return previously
623 * recorded stats.
624 */
625 if (err == -ENOMEM)
626 return net_stats;
01f2e4ea 627
25f0a061
SF		 628 net_stats->tx_packets = stats->tx.tx_frames_ok;
629 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
630 net_stats->tx_errors = stats->tx.tx_errors;
631 net_stats->tx_dropped = stats->tx.tx_drops;
01f2e4ea 632
25f0a061
SF		 633 net_stats->rx_packets = stats->rx.rx_frames_ok;
634 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
635 net_stats->rx_errors = stats->rx.rx_errors;
636 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
350991e1 637 net_stats->rx_over_errors = enic->rq_truncated_pkts;
bd9fb1a4 638 net_stats->rx_crc_errors = enic->rq_bad_fcs;
350991e1 639 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
01f2e4ea 640
25f0a061 641 return net_stats;
01f2e4ea
SF		 642}
643
f009618a
AD		 644static int enic_mc_sync(struct net_device *netdev, const u8 *mc_addr)
645{
646 struct enic *enic = netdev_priv(netdev);
647
648 if (enic->mc_count == ENIC_MULTICAST_PERFECT_FILTERS) {
649 unsigned int mc_count = netdev_mc_count(netdev);
650
651 netdev_warn(netdev, "Registering only %d out of %d multicast addresses\n",
652 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
653
654 return -ENOSPC;
655 }
656
657 enic_dev_add_addr(enic, mc_addr);
658 enic->mc_count++;
659
660 return 0;
661}
662
663static int enic_mc_unsync(struct net_device *netdev, const u8 *mc_addr)
664{
665 struct enic *enic = netdev_priv(netdev);
666
667 enic_dev_del_addr(enic, mc_addr);
668 enic->mc_count--;
669
670 return 0;
671}
672
673static int enic_uc_sync(struct net_device *netdev, const u8 *uc_addr)
674{
675 struct enic *enic = netdev_priv(netdev);
676
677 if (enic->uc_count == ENIC_UNICAST_PERFECT_FILTERS) {
678 unsigned int uc_count = netdev_uc_count(netdev);
679
680 netdev_warn(netdev, "Registering only %d out of %d unicast addresses\n",
681 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
682
683 return -ENOSPC;
684 }
685
686 enic_dev_add_addr(enic, uc_addr);
687 enic->uc_count++;
688
689 return 0;
690}
691
692static int enic_uc_unsync(struct net_device *netdev, const u8 *uc_addr)
693{
694 struct enic *enic = netdev_priv(netdev);
695
696 enic_dev_del_addr(enic, uc_addr);
697 enic->uc_count--;
698
699 return 0;
700}
701
b3abfbd2 702void enic_reset_addr_lists(struct enic *enic)
01f2e4ea 703{
f009618a
AD		 704 struct net_device *netdev = enic->netdev;
705
706 __dev_uc_unsync(netdev, NULL);
707 __dev_mc_unsync(netdev, NULL);
708
01f2e4ea 709 enic->mc_count = 0;
e0afe53f 710 enic->uc_count = 0;
99ef5639 711 enic->flags = 0;
01f2e4ea
SF		 712}
713
714static int enic_set_mac_addr(struct net_device *netdev, char *addr)
715{
f8bd9091
SF		 716 struct enic *enic = netdev_priv(netdev);
717
7335903c 718 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
f8bd9091
SF		 719 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
720 return -EADDRNOTAVAIL;
721 } else {
722 if (!is_valid_ether_addr(addr))
723 return -EADDRNOTAVAIL;
724 }
01f2e4ea
SF		 725
726 memcpy(netdev->dev_addr, addr, netdev->addr_len);
727
728 return 0;
729}
730
f8bd9091
SF		 731static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
732{
733 struct enic *enic = netdev_priv(netdev);
734 struct sockaddr *saddr = p;
735 char *addr = saddr->sa_data;
736 int err;
737
738 if (netif_running(enic->netdev)) {
739 err = enic_dev_del_station_addr(enic);
740 if (err)
741 return err;
742 }
743
744 err = enic_set_mac_addr(netdev, addr);
745 if (err)
746 return err;
747
748 if (netif_running(enic->netdev)) {
749 err = enic_dev_add_station_addr(enic);
750 if (err)
751 return err;
752 }
753
754 return err;
755}
756
757static int enic_set_mac_address(struct net_device *netdev, void *p)
758{
294dab25 759 struct sockaddr *saddr = p;
c76fd32d
VK		 760 char *addr = saddr->sa_data;
761 struct enic *enic = netdev_priv(netdev);
762 int err;
763
764 err = enic_dev_del_station_addr(enic);
765 if (err)
766 return err;
767
768 err = enic_set_mac_addr(netdev, addr);
769 if (err)
770 return err;
294dab25 771
c76fd32d 772 return enic_dev_add_station_addr(enic);
f8bd9091
SF		 773}
774
319d7e84
RP		 775/* netif_tx_lock held, BHs disabled */
776static void enic_set_rx_mode(struct net_device *netdev)
777{
778 struct enic *enic = netdev_priv(netdev);
779 int directed = 1;
780 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
781 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
782 int promisc = (netdev->flags & IFF_PROMISC) ||
783 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
784 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
785 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
786 unsigned int flags = netdev->flags |
787 (allmulti ? IFF_ALLMULTI : 0) |
788 (promisc ? IFF_PROMISC : 0);
789
790 if (enic->flags != flags) {
791 enic->flags = flags;
792 enic_dev_packet_filter(enic, directed,
793 multicast, broadcast, promisc, allmulti);
794 }
795
796 if (!promisc) {
f009618a 797 __dev_uc_sync(netdev, enic_uc_sync, enic_uc_unsync);
319d7e84 798 if (!allmulti)
f009618a 799 __dev_mc_sync(netdev, enic_mc_sync, enic_mc_unsync);
319d7e84
RP		 800 }
801}
802
01f2e4ea
SF		 803/* netif_tx_lock held, BHs disabled */
804static void enic_tx_timeout(struct net_device *netdev)
805{
806 struct enic *enic = netdev_priv(netdev);
807 schedule_work(&enic->reset);
808}
809
0b1c00fc
RP		 810static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
811{
812 struct enic *enic = netdev_priv(netdev);
3f192795
RP		 813 struct enic_port_profile *pp;
814 int err;
0b1c00fc 815
3f192795
RP		 816 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
817 if (err)
818 return err;
0b1c00fc 819
b8622cbd 820 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
b4765833
RP		 821 if (vf == PORT_SELF_VF) {
822 memcpy(pp->vf_mac, mac, ETH_ALEN);
823 return 0;
824 } else {
825 /*
826 * For sriov vf's set the mac in hw
827 */
828 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
829 vnic_dev_set_mac_addr, mac);
830 return enic_dev_status_to_errno(err);
831 }
0b1c00fc
RP		 832 } else
833 return -EINVAL;
834}
835
f8bd9091
SF		 836static int enic_set_vf_port(struct net_device *netdev, int vf,
837 struct nlattr *port[])
838{
839 struct enic *enic = netdev_priv(netdev);
b3abfbd2 840 struct enic_port_profile prev_pp;
3f192795 841 struct enic_port_profile *pp;
b3abfbd2 842 int err = 0, restore_pp = 1;
08f382eb 843
3f192795
RP		 844 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
845 if (err)
846 return err;
08f382eb 847
b3abfbd2
RP		 848 if (!port[IFLA_PORT_REQUEST])
849 return -EOPNOTSUPP;
850
3f192795
RP		 851 memcpy(&prev_pp, pp, sizeof(*enic->pp));
852 memset(pp, 0, sizeof(*enic->pp));
b3abfbd2 853
3f192795
RP		 854 pp->set |= ENIC_SET_REQUEST;
855 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
08f382eb
SF		 856
857 if (port[IFLA_PORT_PROFILE]) {
3f192795
RP		 858 pp->set |= ENIC_SET_NAME;
859 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
08f382eb
SF		 860 PORT_PROFILE_MAX);
861 }
862
863 if (port[IFLA_PORT_INSTANCE_UUID]) {
3f192795
RP		 864 pp->set |= ENIC_SET_INSTANCE;
865 memcpy(pp->instance_uuid,
08f382eb
SF		 866 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
867 }
868
869 if (port[IFLA_PORT_HOST_UUID]) {
3f192795
RP		 870 pp->set |= ENIC_SET_HOST;
871 memcpy(pp->host_uuid,
08f382eb
SF		 872 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
873 }
f8bd9091 874
b4765833
RP		 875 if (vf == PORT_SELF_VF) {
876 /* Special case handling: mac came from IFLA_VF_MAC */
877 if (!is_zero_ether_addr(prev_pp.vf_mac))
878 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
418c437d 879
b4765833
RP		 880 if (is_zero_ether_addr(netdev->dev_addr))
881 eth_hw_addr_random(netdev);
882 } else {
883 /* SR-IOV VF: get mac from adapter */
884 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
885 vnic_dev_get_mac_addr, pp->mac_addr);
886 if (err) {
887 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
888 memcpy(pp, &prev_pp, sizeof(*pp));
889 return enic_dev_status_to_errno(err);
890 }
891 }
f8bd9091 892
3f192795 893 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
b3abfbd2
RP		 894 if (err) {
895 if (restore_pp) {
896 /* Things are still the way they were: Implicit
897 * DISASSOCIATE failed
898 */
3f192795 899 memcpy(pp, &prev_pp, sizeof(*pp));
b3abfbd2 900 } else {
3f192795
RP		 901 memset(pp, 0, sizeof(*pp));
902 if (vf == PORT_SELF_VF)
c7bf7169 903 eth_zero_addr(netdev->dev_addr);
b3abfbd2
RP		 904 }
905 } else {
906 /* Set flag to indicate that the port assoc/disassoc
907 * request has been sent out to fw
908 */
3f192795 909 pp->set |= ENIC_PORT_REQUEST_APPLIED;
b3abfbd2
RP		 910
911 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
3f192795 912 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
c7bf7169 913 eth_zero_addr(pp->mac_addr);
3f192795 914 if (vf == PORT_SELF_VF)
c7bf7169 915 eth_zero_addr(netdev->dev_addr);
b3abfbd2
RP		 916 }
917 }
29639059 918
b4765833 919 if (vf == PORT_SELF_VF)
c7bf7169 920 eth_zero_addr(pp->vf_mac);
29639059 921
29639059 922 return err;
f8bd9091
SF		 923}
924
925static int enic_get_vf_port(struct net_device *netdev, int vf,
926 struct sk_buff *skb)
927{
928 struct enic *enic = netdev_priv(netdev);
f8bd9091 929 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
3f192795 930 struct enic_port_profile *pp;
b3abfbd2 931 int err;
f8bd9091 932
3f192795
RP		 933 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
934 if (err)
935 return err;
936
937 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
08f382eb 938 return -ENODATA;
f8bd9091 939
3f192795 940 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
f8bd9091 941 if (err)
b3abfbd2 942 return err;
f8bd9091 943
1a106de6
DM		 944 if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
945 nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
946 ((pp->set & ENIC_SET_NAME) &&
947 nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
948 ((pp->set & ENIC_SET_INSTANCE) &&
949 nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
950 pp->instance_uuid)) ||
951 ((pp->set & ENIC_SET_HOST) &&
952 nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
953 goto nla_put_failure;
f8bd9091
SF		 954 return 0;
955
956nla_put_failure:
957 return -EMSGSIZE;
958}
959
01f2e4ea
SF		 960static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
961{
962 struct enic *enic = vnic_dev_priv(rq->vdev);
963
964 if (!buf->os_buf)
965 return;
966
967 pci_unmap_single(enic->pdev, buf->dma_addr,
968 buf->len, PCI_DMA_FROMDEVICE);
969 dev_kfree_skb_any(buf->os_buf);
a03bb56e 970 buf->os_buf = NULL;
01f2e4ea
SF		 971}
972
01f2e4ea
SF		 973static int enic_rq_alloc_buf(struct vnic_rq *rq)
974{
975 struct enic *enic = vnic_dev_priv(rq->vdev);
d19e22dc 976 struct net_device *netdev = enic->netdev;
01f2e4ea 977 struct sk_buff *skb;
1825aca6 978 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
01f2e4ea
SF		 979 unsigned int os_buf_index = 0;
980 dma_addr_t dma_addr;
a03bb56e
GV		 981 struct vnic_rq_buf *buf = rq->to_use;
982
983 if (buf->os_buf) {
f6b7734b
GV		 984 enic_queue_rq_desc(rq, buf->os_buf, os_buf_index, buf->dma_addr,
985 buf->len);
01f2e4ea 986
a03bb56e
GV		 987 return 0;
988 }
89d71a66 989 skb = netdev_alloc_skb_ip_align(netdev, len);
01f2e4ea
SF		 990 if (!skb)
991 return -ENOMEM;
992
065df159
GV		 993 dma_addr = pci_map_single(enic->pdev, skb->data, len,
994 PCI_DMA_FROMDEVICE);
995 if (unlikely(enic_dma_map_check(enic, dma_addr))) {
996 dev_kfree_skb(skb);
997 return -ENOMEM;
998 }
01f2e4ea
SF		 999
1000 enic_queue_rq_desc(rq, skb, os_buf_index,
1001 dma_addr, len);
1002
1003 return 0;
1004}
1005
7c2ce6e6
SS		 1006static void enic_intr_update_pkt_size(struct vnic_rx_bytes_counter *pkt_size,
1007 u32 pkt_len)
1008{
1009 if (ENIC_LARGE_PKT_THRESHOLD <= pkt_len)
1010 pkt_size->large_pkt_bytes_cnt += pkt_len;
1011 else
1012 pkt_size->small_pkt_bytes_cnt += pkt_len;
1013}
1014
a03bb56e
GV		 1015static bool enic_rxcopybreak(struct net_device *netdev, struct sk_buff **skb,
1016 struct vnic_rq_buf *buf, u16 len)
1017{
1018 struct enic *enic = netdev_priv(netdev);
1019 struct sk_buff *new_skb;
1020
1021 if (len > enic->rx_copybreak)
1022 return false;
1023 new_skb = netdev_alloc_skb_ip_align(netdev, len);
1024 if (!new_skb)
1025 return false;
1026 pci_dma_sync_single_for_cpu(enic->pdev, buf->dma_addr, len,
1027 DMA_FROM_DEVICE);
1028 memcpy(new_skb->data, (*skb)->data, len);
1029 *skb = new_skb;
1030
1031 return true;
1032}
1033
01f2e4ea
SF		 1034static void enic_rq_indicate_buf(struct vnic_rq *rq,
1035 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1036 int skipped, void *opaque)
1037{
1038 struct enic *enic = vnic_dev_priv(rq->vdev);
86ca9db7 1039 struct net_device *netdev = enic->netdev;
01f2e4ea 1040 struct sk_buff *skb;
7c2ce6e6 1041 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
01f2e4ea
SF		 1042
1043 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1044 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1045 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1046 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1047 u8 packet_error;
f8cac14a 1048 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
01f2e4ea
SF		 1049 u32 rss_hash;
1050
1051 if (skipped)
1052 return;
1053
1054 skb = buf->os_buf;
01f2e4ea
SF		 1055
1056 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1057 &type, &color, &q_number, &completed_index,
1058 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1059 &csum_not_calc, &rss_hash, &bytes_written,
f8cac14a 1060 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
01f2e4ea
SF		 1061 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1062 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1063 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1064 &fcs_ok);
1065
1066 if (packet_error) {
1067
350991e1
SF		 1068 if (!fcs_ok) {
1069 if (bytes_written > 0)
1070 enic->rq_bad_fcs++;
1071 else if (bytes_written == 0)
1072 enic->rq_truncated_pkts++;
1073 }
01f2e4ea 1074
44aa91ab
GV		 1075 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1076 PCI_DMA_FROMDEVICE);
01f2e4ea 1077 dev_kfree_skb_any(skb);
44aa91ab 1078 buf->os_buf = NULL;
01f2e4ea
SF		 1079
1080 return;
1081 }
1082
1083 if (eop && bytes_written > 0) {
1084
1085 /* Good receive
1086 */
1087
a03bb56e
GV		 1088 if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
1089 buf->os_buf = NULL;
1090 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1091 PCI_DMA_FROMDEVICE);
1092 }
1093 prefetch(skb->data - NET_IP_ALIGN);
1094
01f2e4ea 1095 skb_put(skb, bytes_written);
86ca9db7 1096 skb->protocol = eth_type_trans(skb, netdev);
bf751ba8 1097 skb_record_rx_queue(skb, q_number);
1098 if (netdev->features & NETIF_F_RXHASH) {
3739acdd
TH		 1099 skb_set_hash(skb, rss_hash,
1100 (rss_type &
1101 (NIC_CFG_RSS_HASH_TYPE_TCP_IPV6_EX |
1102 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6 |
1103 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4)) ?
1104 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
bf751ba8 1105 }
01f2e4ea 1106
17e96834
GV		 1107 /* Hardware does not provide whole packet checksum. It only
1108 * provides pseudo checksum. Since hw validates the packet
1109 * checksum but not provide us the checksum value. use
1110 * CHECSUM_UNNECESSARY.
1111 */
1112 if ((netdev->features & NETIF_F_RXCSUM) && tcp_udp_csum_ok &&
1113 ipv4_csum_ok)
1114 skb->ip_summed = CHECKSUM_UNNECESSARY;
01f2e4ea 1115
6ede746b 1116 if (vlan_stripped)
86a9bad3 1117 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
01f2e4ea 1118
14747cd9
GV		 1119 skb_mark_napi_id(skb, &enic->napi[rq->index]);
1120 if (enic_poll_busy_polling(rq) ||
1121 !(netdev->features & NETIF_F_GRO))
6ede746b 1122 netif_receive_skb(skb);
14747cd9
GV		 1123 else
1124 napi_gro_receive(&enic->napi[q_number], skb);
7c2ce6e6
SS		 1125 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1126 enic_intr_update_pkt_size(&cq->pkt_size_counter,
1127 bytes_written);
01f2e4ea
SF		 1128 } else {
1129
1130 /* Buffer overflow
1131 */
1132
44aa91ab
GV		 1133 pci_unmap_single(enic->pdev, buf->dma_addr, buf->len,
1134 PCI_DMA_FROMDEVICE);
01f2e4ea 1135 dev_kfree_skb_any(skb);
44aa91ab 1136 buf->os_buf = NULL;
01f2e4ea
SF		 1137 }
1138}
1139
1140static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1141 u8 type, u16 q_number, u16 completed_index, void *opaque)
1142{
1143 struct enic *enic = vnic_dev_priv(vdev);
1144
1145 vnic_rq_service(&enic->rq[q_number], cq_desc,
1146 completed_index, VNIC_RQ_RETURN_DESC,
1147 enic_rq_indicate_buf, opaque);
1148
1149 return 0;
1150}
1151
01f2e4ea
SF		 1152static int enic_poll(struct napi_struct *napi, int budget)
1153{
717258ba
VK		 1154 struct net_device *netdev = napi->dev;
1155 struct enic *enic = netdev_priv(netdev);
1156 unsigned int cq_rq = enic_cq_rq(enic, 0);
1157 unsigned int cq_wq = enic_cq_wq(enic, 0);
1158 unsigned int intr = enic_legacy_io_intr();
01f2e4ea
SF		 1159 unsigned int rq_work_to_do = budget;
1160 unsigned int wq_work_to_do = -1; /* no limit */
4c502549 1161 unsigned int work_done, rq_work_done = 0, wq_work_done;
2d6ddced 1162 int err;
01f2e4ea 1163
14747cd9
GV		 1164 wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
1165 enic_wq_service, NULL);
1166
1167 if (!enic_poll_lock_napi(&enic->rq[cq_rq])) {
1168 if (wq_work_done > 0)
1169 vnic_intr_return_credits(&enic->intr[intr],
1170 wq_work_done,
1171 0 /* dont unmask intr */,
1172 0 /* dont reset intr timer */);
1173 return rq_work_done;
1174 }
01f2e4ea 1175
4c502549
EB		 1176 if (budget > 0)
1177 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1178 rq_work_to_do, enic_rq_service, NULL);
01f2e4ea 1179
01f2e4ea
SF		 1180 /* Accumulate intr event credits for this polling
1181 * cycle. An intr event is the completion of a
1182 * a WQ or RQ packet.
1183 */
1184
1185 work_done = rq_work_done + wq_work_done;
1186
1187 if (work_done > 0)
717258ba 1188 vnic_intr_return_credits(&enic->intr[intr],
01f2e4ea
SF		 1189 work_done,
1190 0 /* don't unmask intr */,
1191 0 /* don't reset intr timer */);
1192
0eb26022 1193 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
01f2e4ea 1194
2d6ddced
SF		 1195 /* Buffer allocation failed. Stay in polling
1196 * mode so we can try to fill the ring again.
1197 */
01f2e4ea 1198
2d6ddced
SF		 1199 if (err)
1200 rq_work_done = rq_work_to_do;
01f2e4ea 1201
2d6ddced 1202 if (rq_work_done < rq_work_to_do) {
01f2e4ea 1203
2d6ddced 1204 /* Some work done, but not enough to stay in polling,
88132f55 1205 * exit polling
01f2e4ea
SF		 1206 */
1207
288379f0 1208 napi_complete(napi);
717258ba 1209 vnic_intr_unmask(&enic->intr[intr]);
01f2e4ea 1210 }
14747cd9 1211 enic_poll_unlock_napi(&enic->rq[cq_rq]);
01f2e4ea
SF		 1212
1213 return rq_work_done;
1214}
1215
7c2ce6e6
SS		 1216static void enic_set_int_moderation(struct enic *enic, struct vnic_rq *rq)
1217{
1218 unsigned int intr = enic_msix_rq_intr(enic, rq->index);
1219 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1220 u32 timer = cq->tobe_rx_coal_timeval;
1221
1222 if (cq->tobe_rx_coal_timeval != cq->cur_rx_coal_timeval) {
1223 vnic_intr_coalescing_timer_set(&enic->intr[intr], timer);
1224 cq->cur_rx_coal_timeval = cq->tobe_rx_coal_timeval;
1225 }
1226}
1227
1228static void enic_calc_int_moderation(struct enic *enic, struct vnic_rq *rq)
1229{
1230 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1231 struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
1232 struct vnic_rx_bytes_counter *pkt_size_counter = &cq->pkt_size_counter;
1233 int index;
1234 u32 timer;
1235 u32 range_start;
1236 u32 traffic;
1237 u64 delta;
1238 ktime_t now = ktime_get();
1239
1240 delta = ktime_us_delta(now, cq->prev_ts);
1241 if (delta < ENIC_AIC_TS_BREAK)
1242 return;
1243 cq->prev_ts = now;
1244
1245 traffic = pkt_size_counter->large_pkt_bytes_cnt +
1246 pkt_size_counter->small_pkt_bytes_cnt;
1247 /* The table takes Mbps
1248 * traffic *= 8 => bits
1249 * traffic *= (10^6 / delta) => bps
1250 * traffic /= 10^6 => Mbps
1251 *
1252 * Combining, traffic *= (8 / delta)
1253 */
1254
1255 traffic <<= 3;
958c492c 1256 traffic = delta > UINT_MAX ? 0 : traffic / (u32)delta;
7c2ce6e6
SS		 1257
1258 for (index = 0; index < ENIC_MAX_COALESCE_TIMERS; index++)
1259 if (traffic < mod_table[index].rx_rate)
1260 break;
1261 range_start = (pkt_size_counter->small_pkt_bytes_cnt >
1262 pkt_size_counter->large_pkt_bytes_cnt << 1) ?
1263 rx_coal->small_pkt_range_start :
1264 rx_coal->large_pkt_range_start;
1265 timer = range_start + ((rx_coal->range_end - range_start) *
1266 mod_table[index].range_percent / 100);
1267 /* Damping */
1268 cq->tobe_rx_coal_timeval = (timer + cq->tobe_rx_coal_timeval) >> 1;
1269
1270 pkt_size_counter->large_pkt_bytes_cnt = 0;
1271 pkt_size_counter->small_pkt_bytes_cnt = 0;
1272}
1273
b6e97c13
GV		 1274#ifdef CONFIG_RFS_ACCEL
1275static void enic_free_rx_cpu_rmap(struct enic *enic)
1276{
1277 free_irq_cpu_rmap(enic->netdev->rx_cpu_rmap);
1278 enic->netdev->rx_cpu_rmap = NULL;
1279}
1280
1281static void enic_set_rx_cpu_rmap(struct enic *enic)
1282{
1283 int i, res;
1284
1285 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX) {
1286 enic->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(enic->rq_count);
1287 if (unlikely(!enic->netdev->rx_cpu_rmap))
1288 return;
1289 for (i = 0; i < enic->rq_count; i++) {
1290 res = irq_cpu_rmap_add(enic->netdev->rx_cpu_rmap,
1291 enic->msix_entry[i].vector);
1292 if (unlikely(res)) {
1293 enic_free_rx_cpu_rmap(enic);
1294 return;
1295 }
1296 }
1297 }
1298}
1299
1300#else
1301
1302static void enic_free_rx_cpu_rmap(struct enic *enic)
1303{
1304}
1305
1306static void enic_set_rx_cpu_rmap(struct enic *enic)
1307{
1308}
1309
1310#endif /* CONFIG_RFS_ACCEL */
1311
14747cd9 1312#ifdef CONFIG_NET_RX_BUSY_POLL
57ae84a0 1313static int enic_busy_poll(struct napi_struct *napi)
14747cd9
GV		 1314{
1315 struct net_device *netdev = napi->dev;
1316 struct enic *enic = netdev_priv(netdev);
1317 unsigned int rq = (napi - &enic->napi[0]);
1318 unsigned int cq = enic_cq_rq(enic, rq);
1319 unsigned int intr = enic_msix_rq_intr(enic, rq);
1320 unsigned int work_to_do = -1; /* clean all pkts possible */
1321 unsigned int work_done;
1322
1323 if (!enic_poll_lock_poll(&enic->rq[rq]))
1324 return LL_FLUSH_BUSY;
1325 work_done = vnic_cq_service(&enic->cq[cq], work_to_do,
1326 enic_rq_service, NULL);
1327
1328 if (work_done > 0)
1329 vnic_intr_return_credits(&enic->intr[intr],
1330 work_done, 0, 0);
1331 vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1332 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1333 enic_calc_int_moderation(enic, &enic->rq[rq]);
1334 enic_poll_unlock_poll(&enic->rq[rq]);
1335
1336 return work_done;
1337}
1338#endif /* CONFIG_NET_RX_BUSY_POLL */
1339
4cfe8785
GV		 1340static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
1341{
1342 struct net_device *netdev = napi->dev;
1343 struct enic *enic = netdev_priv(netdev);
1344 unsigned int wq_index = (napi - &enic->napi[0]) - enic->rq_count;
1345 struct vnic_wq *wq = &enic->wq[wq_index];
1346 unsigned int cq;
1347 unsigned int intr;
1348 unsigned int wq_work_to_do = -1; /* clean all desc possible */
1349 unsigned int wq_work_done;
1350 unsigned int wq_irq;
1351
1352 wq_irq = wq->index;
1353 cq = enic_cq_wq(enic, wq_irq);
1354 intr = enic_msix_wq_intr(enic, wq_irq);
1355 wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
1356 enic_wq_service, NULL);
1357
1358 vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
1359 0 /* don't unmask intr */,
1360 1 /* reset intr timer */);
1361 if (!wq_work_done) {
1362 napi_complete(napi);
1363 vnic_intr_unmask(&enic->intr[intr]);
f41281d0 1364 return 0;
4cfe8785
GV		 1365 }
1366
f41281d0 1367 return budget;
4cfe8785
GV		 1368}
1369
1370static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
01f2e4ea 1371{
717258ba
VK		 1372 struct net_device *netdev = napi->dev;
1373 struct enic *enic = netdev_priv(netdev);
1374 unsigned int rq = (napi - &enic->napi[0]);
1375 unsigned int cq = enic_cq_rq(enic, rq);
1376 unsigned int intr = enic_msix_rq_intr(enic, rq);
01f2e4ea 1377 unsigned int work_to_do = budget;
4c502549 1378 unsigned int work_done = 0;
2d6ddced 1379 int err;
01f2e4ea 1380
14747cd9 1381 if (!enic_poll_lock_napi(&enic->rq[rq]))
f104fedc 1382 return budget;
01f2e4ea
SF		 1383 /* Service RQ
1384 */
1385
4c502549
EB		 1386 if (budget > 0)
1387 work_done = vnic_cq_service(&enic->cq[cq],
1388 work_to_do, enic_rq_service, NULL);
01f2e4ea 1389
2d6ddced
SF		 1390 /* Return intr event credits for this polling
1391 * cycle. An intr event is the completion of a
1392 * RQ packet.
1393 */
01f2e4ea 1394
2d6ddced 1395 if (work_done > 0)
717258ba 1396 vnic_intr_return_credits(&enic->intr[intr],
01f2e4ea
SF		 1397 work_done,
1398 0 /* don't unmask intr */,
1399 0 /* don't reset intr timer */);
01f2e4ea 1400
0eb26022 1401 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
2d6ddced
SF		 1402
1403 /* Buffer allocation failed. Stay in polling mode
1404 * so we can try to fill the ring again.
1405 */
1406
1407 if (err)
1408 work_done = work_to_do;
7c2ce6e6
SS		 1409 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1410 /* Call the function which refreshes
1411 * the intr coalescing timer value based on
1412 * the traffic. This is supported only in
1413 * the case of MSI-x mode
1414 */
1415 enic_calc_int_moderation(enic, &enic->rq[rq]);
2d6ddced 1416
6286e828 1417 enic_poll_unlock_napi(&enic->rq[rq]);
2d6ddced
SF		 1418 if (work_done < work_to_do) {
1419
1420 /* Some work done, but not enough to stay in polling,
88132f55 1421 * exit polling
01f2e4ea
SF		 1422 */
1423
288379f0 1424 napi_complete(napi);
7c2ce6e6
SS		 1425 if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
1426 enic_set_int_moderation(enic, &enic->rq[rq]);
717258ba 1427 vnic_intr_unmask(&enic->intr[intr]);
01f2e4ea
SF		 1428 }
1429
1430 return work_done;
1431}
1432
1433static void enic_notify_timer(unsigned long data)
1434{
1435 struct enic *enic = (struct enic *)data;
1436
1437 enic_notify_check(enic);
1438
25f0a061
SF		 1439 mod_timer(&enic->notify_timer,
1440 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
01f2e4ea
SF		 1441}
1442
1443static void enic_free_intr(struct enic *enic)
1444{
1445 struct net_device *netdev = enic->netdev;
1446 unsigned int i;
1447
b6e97c13 1448 enic_free_rx_cpu_rmap(enic);
01f2e4ea
SF		 1449 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1450 case VNIC_DEV_INTR_MODE_INTX:
01f2e4ea
SF		 1451 free_irq(enic->pdev->irq, netdev);
1452 break;
8f4d248c
SF		 1453 case VNIC_DEV_INTR_MODE_MSI:
1454 free_irq(enic->pdev->irq, enic);
1455 break;
01f2e4ea
SF		 1456 case VNIC_DEV_INTR_MODE_MSIX:
1457 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1458 if (enic->msix[i].requested)
1459 free_irq(enic->msix_entry[i].vector,
1460 enic->msix[i].devid);
1461 break;
1462 default:
1463 break;
1464 }
1465}
1466
1467static int enic_request_intr(struct enic *enic)
1468{
1469 struct net_device *netdev = enic->netdev;
717258ba 1470 unsigned int i, intr;
01f2e4ea
SF		 1471 int err = 0;
1472
b6e97c13 1473 enic_set_rx_cpu_rmap(enic);
01f2e4ea
SF		 1474 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1475
1476 case VNIC_DEV_INTR_MODE_INTX:
1477
1478 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1479 IRQF_SHARED, netdev->name, netdev);
1480 break;
1481
1482 case VNIC_DEV_INTR_MODE_MSI:
1483
1484 err = request_irq(enic->pdev->irq, enic_isr_msi,
1485 0, netdev->name, enic);
1486 break;
1487
1488 case VNIC_DEV_INTR_MODE_MSIX:
1489
717258ba
VK		 1490 for (i = 0; i < enic->rq_count; i++) {
1491 intr = enic_msix_rq_intr(enic, i);
4505f40a
DC		 1492 snprintf(enic->msix[intr].devname,
1493 sizeof(enic->msix[intr].devname),
717258ba 1494 "%.11s-rx-%d", netdev->name, i);
4cfe8785 1495 enic->msix[intr].isr = enic_isr_msix;
717258ba
VK		 1496 enic->msix[intr].devid = &enic->napi[i];
1497 }
01f2e4ea 1498
717258ba 1499 for (i = 0; i < enic->wq_count; i++) {
4cfe8785
GV		 1500 int wq = enic_cq_wq(enic, i);
1501
717258ba 1502 intr = enic_msix_wq_intr(enic, i);
4505f40a
DC		 1503 snprintf(enic->msix[intr].devname,
1504 sizeof(enic->msix[intr].devname),
717258ba 1505 "%.11s-tx-%d", netdev->name, i);
4cfe8785
GV		 1506 enic->msix[intr].isr = enic_isr_msix;
1507 enic->msix[intr].devid = &enic->napi[wq];
717258ba 1508 }
01f2e4ea 1509
717258ba 1510 intr = enic_msix_err_intr(enic);
4505f40a
DC		 1511 snprintf(enic->msix[intr].devname,
1512 sizeof(enic->msix[intr].devname),
01f2e4ea 1513 "%.11s-err", netdev->name);
717258ba
VK		 1514 enic->msix[intr].isr = enic_isr_msix_err;
1515 enic->msix[intr].devid = enic;
01f2e4ea 1516
717258ba 1517 intr = enic_msix_notify_intr(enic);
4505f40a
DC		 1518 snprintf(enic->msix[intr].devname,
1519 sizeof(enic->msix[intr].devname),
01f2e4ea 1520 "%.11s-notify", netdev->name);
717258ba
VK		 1521 enic->msix[intr].isr = enic_isr_msix_notify;
1522 enic->msix[intr].devid = enic;
1523
1524 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1525 enic->msix[i].requested = 0;
01f2e4ea 1526
717258ba 1527 for (i = 0; i < enic->intr_count; i++) {
01f2e4ea
SF		 1528 err = request_irq(enic->msix_entry[i].vector,
1529 enic->msix[i].isr, 0,
1530 enic->msix[i].devname,
1531 enic->msix[i].devid);
1532 if (err) {
1533 enic_free_intr(enic);
1534 break;
1535 }
1536 enic->msix[i].requested = 1;
1537 }
1538
1539 break;
1540
1541 default:
1542 break;
1543 }
1544
1545 return err;
1546}
1547
b3d18d19
SF		 1548static void enic_synchronize_irqs(struct enic *enic)
1549{
1550 unsigned int i;
1551
1552 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1553 case VNIC_DEV_INTR_MODE_INTX:
1554 case VNIC_DEV_INTR_MODE_MSI:
1555 synchronize_irq(enic->pdev->irq);
1556 break;
1557 case VNIC_DEV_INTR_MODE_MSIX:
1558 for (i = 0; i < enic->intr_count; i++)
1559 synchronize_irq(enic->msix_entry[i].vector);
1560 break;
1561 default:
1562 break;
1563 }
1564}
1565
7c2ce6e6
SS		 1566static void enic_set_rx_coal_setting(struct enic *enic)
1567{
1568 unsigned int speed;
1569 int index = -1;
1570 struct enic_rx_coal *rx_coal = &enic->rx_coalesce_setting;
1571
1572 /* If intr mode is not MSIX, do not do adaptive coalescing */
1573 if (VNIC_DEV_INTR_MODE_MSIX != vnic_dev_get_intr_mode(enic->vdev)) {
1574 netdev_info(enic->netdev, "INTR mode is not MSIX, Not initializing adaptive coalescing");
1575 return;
1576 }
1577
1578 /* 1. Read the link speed from fw
1579 * 2. Pick the default range for the speed
1580 * 3. Update it in enic->rx_coalesce_setting
1581 */
1582 speed = vnic_dev_port_speed(enic->vdev);
1583 if (ENIC_LINK_SPEED_10G < speed)
1584 index = ENIC_LINK_40G_INDEX;
1585 else if (ENIC_LINK_SPEED_4G < speed)
1586 index = ENIC_LINK_10G_INDEX;
1587 else
1588 index = ENIC_LINK_4G_INDEX;
1589
1590 rx_coal->small_pkt_range_start = mod_range[index].small_pkt_range_start;
1591 rx_coal->large_pkt_range_start = mod_range[index].large_pkt_range_start;
1592 rx_coal->range_end = ENIC_RX_COALESCE_RANGE_END;
1593
1594 /* Start with the value provided by UCSM */
1595 for (index = 0; index < enic->rq_count; index++)
1596 enic->cq[index].cur_rx_coal_timeval =
1597 enic->config.intr_timer_usec;
1598
1599 rx_coal->use_adaptive_rx_coalesce = 1;
1600}
1601
383ab92f 1602static int enic_dev_notify_set(struct enic *enic)
01f2e4ea
SF		 1603{
1604 int err;
1605
8e091340 1606 spin_lock_bh(&enic->devcmd_lock);
01f2e4ea
SF		 1607 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1608 case VNIC_DEV_INTR_MODE_INTX:
717258ba
VK		 1609 err = vnic_dev_notify_set(enic->vdev,
1610 enic_legacy_notify_intr());
01f2e4ea
SF		 1611 break;
1612 case VNIC_DEV_INTR_MODE_MSIX:
717258ba
VK		 1613 err = vnic_dev_notify_set(enic->vdev,
1614 enic_msix_notify_intr(enic));
01f2e4ea
SF		 1615 break;
1616 default:
1617 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1618 break;
1619 }
8e091340 1620 spin_unlock_bh(&enic->devcmd_lock);
01f2e4ea
SF		 1621
1622 return err;
1623}
1624
1625static void enic_notify_timer_start(struct enic *enic)
1626{
1627 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1628 case VNIC_DEV_INTR_MODE_MSI:
1629 mod_timer(&enic->notify_timer, jiffies);
1630 break;
1631 default:
1632 /* Using intr for notification for INTx/MSI-X */
1633 break;
6403eab1 1634 }
01f2e4ea
SF		 1635}
1636
1637/* rtnl lock is held, process context */
1638static int enic_open(struct net_device *netdev)
1639{
1640 struct enic *enic = netdev_priv(netdev);
1641 unsigned int i;
1642 int err;
1643
4b75a442
SF		 1644 err = enic_request_intr(enic);
1645 if (err) {
a7a79deb 1646 netdev_err(netdev, "Unable to request irq.\n");
4b75a442
SF		 1647 return err;
1648 }
1649
383ab92f 1650 err = enic_dev_notify_set(enic);
4b75a442 1651 if (err) {
a7a79deb
VK		 1652 netdev_err(netdev,
1653 "Failed to alloc notify buffer, aborting.\n");
4b75a442
SF		 1654 goto err_out_free_intr;
1655 }
1656
01f2e4ea 1657 for (i = 0; i < enic->rq_count; i++) {
0eb26022 1658 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
2d6ddced
SF		 1659 /* Need at least one buffer on ring to get going */
1660 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
a7a79deb 1661 netdev_err(netdev, "Unable to alloc receive buffers\n");
2d6ddced 1662 err = -ENOMEM;
9dac6232 1663 goto err_out_free_rq;
01f2e4ea
SF		 1664 }
1665 }
1666
1667 for (i = 0; i < enic->wq_count; i++)
1668 vnic_wq_enable(&enic->wq[i]);
1669 for (i = 0; i < enic->rq_count; i++)
1670 vnic_rq_enable(&enic->rq[i]);
1671
7335903c 1672 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
29639059 1673 enic_dev_add_station_addr(enic);
3f192795 1674
319d7e84 1675 enic_set_rx_mode(netdev);
01f2e4ea 1676
822473b6 1677 netif_tx_wake_all_queues(netdev);
717258ba 1678
14747cd9
GV		 1679 for (i = 0; i < enic->rq_count; i++) {
1680 enic_busy_poll_init_lock(&enic->rq[i]);
717258ba 1681 napi_enable(&enic->napi[i]);
14747cd9 1682 }
4cfe8785
GV		 1683 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1684 for (i = 0; i < enic->wq_count; i++)
1685 napi_enable(&enic->napi[enic_cq_wq(enic, i)]);
383ab92f 1686 enic_dev_enable(enic);
01f2e4ea
SF		 1687
1688 for (i = 0; i < enic->intr_count; i++)
1689 vnic_intr_unmask(&enic->intr[i]);
1690
1691 enic_notify_timer_start(enic);
a145df23 1692 enic_rfs_flw_tbl_init(enic);
01f2e4ea
SF		 1693
1694 return 0;
4b75a442 1695
9dac6232
GV		 1696err_out_free_rq:
1697 for (i = 0; i < enic->rq_count; i++)
1698 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
383ab92f 1699 enic_dev_notify_unset(enic);
4b75a442
SF		 1700err_out_free_intr:
1701 enic_free_intr(enic);
1702
1703 return err;
01f2e4ea
SF		 1704}
1705
1706/* rtnl lock is held, process context */
1707static int enic_stop(struct net_device *netdev)
1708{
1709 struct enic *enic = netdev_priv(netdev);
1710 unsigned int i;
1711 int err;
1712
29046f9b 1713 for (i = 0; i < enic->intr_count; i++) {
b3d18d19 1714 vnic_intr_mask(&enic->intr[i]);
29046f9b
VK		 1715 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1716 }
b3d18d19
SF		 1717
1718 enic_synchronize_irqs(enic);
1719
01f2e4ea 1720 del_timer_sync(&enic->notify_timer);
a145df23 1721 enic_rfs_flw_tbl_free(enic);
01f2e4ea 1722
383ab92f 1723 enic_dev_disable(enic);
717258ba 1724
14747cd9 1725 for (i = 0; i < enic->rq_count; i++) {
717258ba 1726 napi_disable(&enic->napi[i]);
39dc90c1 1727 local_bh_disable();
14747cd9
GV		 1728 while (!enic_poll_lock_napi(&enic->rq[i]))
1729 mdelay(1);
39dc90c1 1730 local_bh_enable();
14747cd9 1731 }
717258ba 1732
b3d18d19
SF		 1733 netif_carrier_off(netdev);
1734 netif_tx_disable(netdev);
4cfe8785
GV		 1735 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
1736 for (i = 0; i < enic->wq_count; i++)
1737 napi_disable(&enic->napi[enic_cq_wq(enic, i)]);
3f192795 1738
7335903c 1739 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
29639059 1740 enic_dev_del_station_addr(enic);
f8bd9091 1741
01f2e4ea
SF		 1742 for (i = 0; i < enic->wq_count; i++) {
1743 err = vnic_wq_disable(&enic->wq[i]);
1744 if (err)
1745 return err;
1746 }
1747 for (i = 0; i < enic->rq_count; i++) {
1748 err = vnic_rq_disable(&enic->rq[i]);
1749 if (err)
1750 return err;
1751 }
1752
383ab92f 1753 enic_dev_notify_unset(enic);
4b75a442
SF		 1754 enic_free_intr(enic);
1755
01f2e4ea
SF		 1756 for (i = 0; i < enic->wq_count; i++)
1757 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1758 for (i = 0; i < enic->rq_count; i++)
1759 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1760 for (i = 0; i < enic->cq_count; i++)
1761 vnic_cq_clean(&enic->cq[i]);
1762 for (i = 0; i < enic->intr_count; i++)
1763 vnic_intr_clean(&enic->intr[i]);
1764
1765 return 0;
1766}
1767
1768static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1769{
1770 struct enic *enic = netdev_priv(netdev);
1771 int running = netif_running(netdev);
1772
25f0a061
SF		 1773 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1774 return -EINVAL;
1775
7335903c 1776 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
c97c894d
RP		 1777 return -EOPNOTSUPP;
1778
01f2e4ea
SF		 1779 if (running)
1780 enic_stop(netdev);
1781
01f2e4ea
SF		 1782 netdev->mtu = new_mtu;
1783
1784 if (netdev->mtu > enic->port_mtu)
a7a79deb
VK		 1785 netdev_warn(netdev,
1786 "interface MTU (%d) set higher than port MTU (%d)\n",
1787 netdev->mtu, enic->port_mtu);
01f2e4ea
SF		 1788
1789 if (running)
1790 enic_open(netdev);
1791
1792 return 0;
1793}
1794
c97c894d
RP		 1795static void enic_change_mtu_work(struct work_struct *work)
1796{
1797 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1798 struct net_device *netdev = enic->netdev;
1799 int new_mtu = vnic_dev_mtu(enic->vdev);
1800 int err;
1801 unsigned int i;
1802
1803 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1804
1805 rtnl_lock();
1806
1807 /* Stop RQ */
1808 del_timer_sync(&enic->notify_timer);
1809
1810 for (i = 0; i < enic->rq_count; i++)
1811 napi_disable(&enic->napi[i]);
1812
1813 vnic_intr_mask(&enic->intr[0]);
1814 enic_synchronize_irqs(enic);
1815 err = vnic_rq_disable(&enic->rq[0]);
1816 if (err) {
e057590b 1817 rtnl_unlock();
c97c894d
RP		 1818 netdev_err(netdev, "Unable to disable RQ.\n");
1819 return;
1820 }
1821 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1822 vnic_cq_clean(&enic->cq[0]);
1823 vnic_intr_clean(&enic->intr[0]);
1824
1825 /* Fill RQ with new_mtu-sized buffers */
1826 netdev->mtu = new_mtu;
1827 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1828 /* Need at least one buffer on ring to get going */
1829 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
e057590b 1830 rtnl_unlock();
c97c894d
RP		 1831 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1832 return;
1833 }
1834
1835 /* Start RQ */
1836 vnic_rq_enable(&enic->rq[0]);
1837 napi_enable(&enic->napi[0]);
1838 vnic_intr_unmask(&enic->intr[0]);
1839 enic_notify_timer_start(enic);
1840
1841 rtnl_unlock();
1842
1843 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1844}
1845
01f2e4ea
SF		 1846#ifdef CONFIG_NET_POLL_CONTROLLER
1847static void enic_poll_controller(struct net_device *netdev)
1848{
1849 struct enic *enic = netdev_priv(netdev);
1850 struct vnic_dev *vdev = enic->vdev;
717258ba 1851 unsigned int i, intr;
01f2e4ea
SF		 1852
1853 switch (vnic_dev_get_intr_mode(vdev)) {
1854 case VNIC_DEV_INTR_MODE_MSIX:
717258ba
VK		 1855 for (i = 0; i < enic->rq_count; i++) {
1856 intr = enic_msix_rq_intr(enic, i);
4cfe8785
GV		 1857 enic_isr_msix(enic->msix_entry[intr].vector,
1858 &enic->napi[i]);
717258ba 1859 }
b880a954
VK		 1860
1861 for (i = 0; i < enic->wq_count; i++) {
1862 intr = enic_msix_wq_intr(enic, i);
4cfe8785
GV		 1863 enic_isr_msix(enic->msix_entry[intr].vector,
1864 &enic->napi[enic_cq_wq(enic, i)]);
b880a954
VK		 1865 }
1866
01f2e4ea
SF		 1867 break;
1868 case VNIC_DEV_INTR_MODE_MSI:
1869 enic_isr_msi(enic->pdev->irq, enic);
1870 break;
1871 case VNIC_DEV_INTR_MODE_INTX:
1872 enic_isr_legacy(enic->pdev->irq, netdev);
1873 break;
1874 default:
1875 break;
1876 }
1877}
1878#endif
1879
1880static int enic_dev_wait(struct vnic_dev *vdev,
1881 int (*start)(struct vnic_dev *, int),
1882 int (*finished)(struct vnic_dev *, int *),
1883 int arg)
1884{
1885 unsigned long time;
1886 int done;
1887 int err;
1888
1889 BUG_ON(in_interrupt());
1890
1891 err = start(vdev, arg);
1892 if (err)
1893 return err;
1894
1895 /* Wait for func to complete...2 seconds max
1896 */
1897
1898 time = jiffies + (HZ * 2);
1899 do {
1900
1901 err = finished(vdev, &done);
1902 if (err)
1903 return err;
1904
1905 if (done)
1906 return 0;
1907
1908 schedule_timeout_uninterruptible(HZ / 10);
1909
1910 } while (time_after(time, jiffies));
1911
1912 return -ETIMEDOUT;
1913}
1914
1915static int enic_dev_open(struct enic *enic)
1916{
1917 int err;
1918
1919 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1920 vnic_dev_open_done, 0);
1921 if (err)
a7a79deb
VK		 1922 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1923 err);
01f2e4ea
SF		 1924
1925 return err;
1926}
1927
99ef5639 1928static int enic_dev_hang_reset(struct enic *enic)
01f2e4ea
SF		 1929{
1930 int err;
1931
99ef5639
VK		 1932 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1933 vnic_dev_hang_reset_done, 0);
01f2e4ea 1934 if (err)
a7a79deb
VK		 1935 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1936 err);
01f2e4ea
SF		 1937
1938 return err;
1939}
1940
4f675eb2 1941int __enic_set_rsskey(struct enic *enic)
717258ba 1942{
c33d23c2 1943 union vnic_rss_key *rss_key_buf_va;
1f4f067f 1944 dma_addr_t rss_key_buf_pa;
c33d23c2 1945 int i, kidx, bidx, err;
717258ba 1946
c33d23c2
ED		 1947 rss_key_buf_va = pci_zalloc_consistent(enic->pdev,
1948 sizeof(union vnic_rss_key),
1949 &rss_key_buf_pa);
717258ba
VK		 1950 if (!rss_key_buf_va)
1951 return -ENOMEM;
1952
c33d23c2
ED		 1953 for (i = 0; i < ENIC_RSS_LEN; i++) {
1954 kidx = i / ENIC_RSS_BYTES_PER_KEY;
1955 bidx = i % ENIC_RSS_BYTES_PER_KEY;
4f675eb2 1956 rss_key_buf_va->key[kidx].b[bidx] = enic->rss_key[i];
c33d23c2 1957 }
8e091340 1958 spin_lock_bh(&enic->devcmd_lock);
717258ba
VK		 1959 err = enic_set_rss_key(enic,
1960 rss_key_buf_pa,
1961 sizeof(union vnic_rss_key));
8e091340 1962 spin_unlock_bh(&enic->devcmd_lock);
717258ba
VK		 1963
1964 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1965 rss_key_buf_va, rss_key_buf_pa);
1966
1967 return err;
1968}
1969
4f675eb2
GV		 1970static int enic_set_rsskey(struct enic *enic)
1971{
1972 netdev_rss_key_fill(enic->rss_key, ENIC_RSS_LEN);
1973
1974 return __enic_set_rsskey(enic);
1975}
1976
717258ba
VK		 1977static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1978{
1f4f067f 1979 dma_addr_t rss_cpu_buf_pa;
717258ba
VK		 1980 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1981 unsigned int i;
1982 int err;
1983
1984 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1985 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1986 if (!rss_cpu_buf_va)
1987 return -ENOMEM;
1988
1989 for (i = 0; i < (1 << rss_hash_bits); i++)
1990 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1991
8e091340 1992 spin_lock_bh(&enic->devcmd_lock);
717258ba
VK		 1993 err = enic_set_rss_cpu(enic,
1994 rss_cpu_buf_pa,
1995 sizeof(union vnic_rss_cpu));
8e091340 1996 spin_unlock_bh(&enic->devcmd_lock);
717258ba
VK		 1997
1998 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1999 rss_cpu_buf_va, rss_cpu_buf_pa);
2000
2001 return err;
2002}
2003
2004static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2005 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
68f71708 2006{
68f71708
SF		 2007 const u8 tso_ipid_split_en = 0;
2008 const u8 ig_vlan_strip_en = 1;
383ab92f 2009 int err;
68f71708 2010
717258ba
VK		 2011 /* Enable VLAN tag stripping.
2012 */
68f71708 2013
8e091340 2014 spin_lock_bh(&enic->devcmd_lock);
383ab92f 2015 err = enic_set_nic_cfg(enic,
68f71708
SF		 2016 rss_default_cpu, rss_hash_type,
2017 rss_hash_bits, rss_base_cpu,
2018 rss_enable, tso_ipid_split_en,
2019 ig_vlan_strip_en);
8e091340 2020 spin_unlock_bh(&enic->devcmd_lock);
383ab92f
VK		 2021
2022 return err;
2023}
2024
717258ba
VK		 2025static int enic_set_rss_nic_cfg(struct enic *enic)
2026{
2027 struct device *dev = enic_get_dev(enic);
2028 const u8 rss_default_cpu = 0;
2029 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2030 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2031 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2032 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2033 const u8 rss_hash_bits = 7;
2034 const u8 rss_base_cpu = 0;
2035 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2036
2037 if (rss_enable) {
2038 if (!enic_set_rsskey(enic)) {
2039 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2040 rss_enable = 0;
2041 dev_warn(dev, "RSS disabled, "
2042 "Failed to set RSS cpu indirection table.");
2043 }
2044 } else {
2045 rss_enable = 0;
2046 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2047 }
2048 }
2049
2050 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2051 rss_hash_bits, rss_base_cpu, rss_enable);
f8cac14a
VK		 2052}
2053
01f2e4ea
SF		 2054static void enic_reset(struct work_struct *work)
2055{
2056 struct enic *enic = container_of(work, struct enic, reset);
2057
2058 if (!netif_running(enic->netdev))
2059 return;
2060
2061 rtnl_lock();
2062
0b038566 2063 spin_lock(&enic->enic_api_lock);
383ab92f 2064 enic_dev_hang_notify(enic);
01f2e4ea 2065 enic_stop(enic->netdev);
99ef5639 2066 enic_dev_hang_reset(enic);
e0afe53f 2067 enic_reset_addr_lists(enic);
01f2e4ea 2068 enic_init_vnic_resources(enic);
717258ba 2069 enic_set_rss_nic_cfg(enic);
f8cac14a 2070 enic_dev_set_ig_vlan_rewrite_mode(enic);
01f2e4ea 2071 enic_open(enic->netdev);
0b038566 2072 spin_unlock(&enic->enic_api_lock);
d765bb41 2073 call_netdevice_notifiers(NETDEV_REBOOT, enic->netdev);
01f2e4ea
SF		 2074
2075 rtnl_unlock();
2076}
2077
2078static int enic_set_intr_mode(struct enic *enic)
2079{
717258ba 2080 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1cbb1a61 2081 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
01f2e4ea
SF		 2082 unsigned int i;
2083
2084 /* Set interrupt mode (INTx, MSI, MSI-X) depending
717258ba 2085 * on system capabilities.
01f2e4ea
SF		 2086 *
2087 * Try MSI-X first
2088 *
2089 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2090 * (the second to last INTR is used for WQ/RQ errors)
2091 * (the last INTR is used for notifications)
2092 */
2093
2094 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2095 for (i = 0; i < n + m + 2; i++)
2096 enic->msix_entry[i].entry = i;
2097
717258ba
VK		 2098 /* Use multiple RQs if RSS is enabled
2099 */
2100
2101 if (ENIC_SETTING(enic, RSS) &&
2102 enic->config.intr_mode < 1 &&
01f2e4ea
SF		 2103 enic->rq_count >= n &&
2104 enic->wq_count >= m &&
2105 enic->cq_count >= n + m &&
717258ba 2106 enic->intr_count >= n + m + 2) {
01f2e4ea 2107
abbb6a37
AG		 2108 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2109 n + m + 2, n + m + 2) > 0) {
01f2e4ea 2110
717258ba
VK		 2111 enic->rq_count = n;
2112 enic->wq_count = m;
2113 enic->cq_count = n + m;
2114 enic->intr_count = n + m + 2;
01f2e4ea 2115
717258ba
VK		 2116 vnic_dev_set_intr_mode(enic->vdev,
2117 VNIC_DEV_INTR_MODE_MSIX);
2118
2119 return 0;
2120 }
2121 }
2122
2123 if (enic->config.intr_mode < 1 &&
2124 enic->rq_count >= 1 &&
2125 enic->wq_count >= m &&
2126 enic->cq_count >= 1 + m &&
2127 enic->intr_count >= 1 + m + 2) {
abbb6a37
AG		 2128 if (pci_enable_msix_range(enic->pdev, enic->msix_entry,
2129 1 + m + 2, 1 + m + 2) > 0) {
717258ba
VK		 2130
2131 enic->rq_count = 1;
2132 enic->wq_count = m;
2133 enic->cq_count = 1 + m;
2134 enic->intr_count = 1 + m + 2;
2135
2136 vnic_dev_set_intr_mode(enic->vdev,
2137 VNIC_DEV_INTR_MODE_MSIX);
2138
2139 return 0;
2140 }
01f2e4ea
SF		 2141 }
2142
2143 /* Next try MSI
2144 *
2145 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2146 */
2147
2148 if (enic->config.intr_mode < 2 &&
2149 enic->rq_count >= 1 &&
2150 enic->wq_count >= 1 &&
2151 enic->cq_count >= 2 &&
2152 enic->intr_count >= 1 &&
2153 !pci_enable_msi(enic->pdev)) {
2154
2155 enic->rq_count = 1;
2156 enic->wq_count = 1;
2157 enic->cq_count = 2;
2158 enic->intr_count = 1;
2159
2160 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2161
2162 return 0;
2163 }
2164
2165 /* Next try INTx
2166 *
2167 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2168 * (the first INTR is used for WQ/RQ)
2169 * (the second INTR is used for WQ/RQ errors)
2170 * (the last INTR is used for notifications)
2171 */
2172
2173 if (enic->config.intr_mode < 3 &&
2174 enic->rq_count >= 1 &&
2175 enic->wq_count >= 1 &&
2176 enic->cq_count >= 2 &&
2177 enic->intr_count >= 3) {
2178
2179 enic->rq_count = 1;
2180 enic->wq_count = 1;
2181 enic->cq_count = 2;
2182 enic->intr_count = 3;
2183
2184 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2185
2186 return 0;
2187 }
2188
2189 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2190
2191 return -EINVAL;
2192}
2193
2194static void enic_clear_intr_mode(struct enic *enic)
2195{
2196 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2197 case VNIC_DEV_INTR_MODE_MSIX:
2198 pci_disable_msix(enic->pdev);
2199 break;
2200 case VNIC_DEV_INTR_MODE_MSI:
2201 pci_disable_msi(enic->pdev);
2202 break;
2203 default:
2204 break;
2205 }
2206
2207 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2208}
2209
f8bd9091
SF		 2210static const struct net_device_ops enic_netdev_dynamic_ops = {
2211 .ndo_open = enic_open,
2212 .ndo_stop = enic_stop,
2213 .ndo_start_xmit = enic_hard_start_xmit,
f20530bc 2214 .ndo_get_stats64 = enic_get_stats,
f8bd9091 2215 .ndo_validate_addr = eth_validate_addr,
319d7e84 2216 .ndo_set_rx_mode = enic_set_rx_mode,
f8bd9091
SF		 2217 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2218 .ndo_change_mtu = enic_change_mtu,
f8bd9091
SF		 2219 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2220 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2221 .ndo_tx_timeout = enic_tx_timeout,
2222 .ndo_set_vf_port = enic_set_vf_port,
2223 .ndo_get_vf_port = enic_get_vf_port,
0b1c00fc 2224 .ndo_set_vf_mac = enic_set_vf_mac,
f8bd9091
SF		 2225#ifdef CONFIG_NET_POLL_CONTROLLER
2226 .ndo_poll_controller = enic_poll_controller,
2227#endif
a145df23
GV		 2228#ifdef CONFIG_RFS_ACCEL
2229 .ndo_rx_flow_steer = enic_rx_flow_steer,
2230#endif
14747cd9
GV		 2231#ifdef CONFIG_NET_RX_BUSY_POLL
2232 .ndo_busy_poll = enic_busy_poll,
2233#endif
f8bd9091
SF		 2234};
2235
afe29f7a
SH		 2236static const struct net_device_ops enic_netdev_ops = {
2237 .ndo_open = enic_open,
2238 .ndo_stop = enic_stop,
00829823 2239 .ndo_start_xmit = enic_hard_start_xmit,
f20530bc 2240 .ndo_get_stats64 = enic_get_stats,
afe29f7a 2241 .ndo_validate_addr = eth_validate_addr,
f8bd9091 2242 .ndo_set_mac_address = enic_set_mac_address,
319d7e84 2243 .ndo_set_rx_mode = enic_set_rx_mode,
afe29f7a 2244 .ndo_change_mtu = enic_change_mtu,
afe29f7a
SH		 2245 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2246 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2247 .ndo_tx_timeout = enic_tx_timeout,
3f192795
RP		 2248 .ndo_set_vf_port = enic_set_vf_port,
2249 .ndo_get_vf_port = enic_get_vf_port,
2250 .ndo_set_vf_mac = enic_set_vf_mac,
afe29f7a
SH		 2251#ifdef CONFIG_NET_POLL_CONTROLLER
2252 .ndo_poll_controller = enic_poll_controller,
2253#endif
a145df23
GV		 2254#ifdef CONFIG_RFS_ACCEL
2255 .ndo_rx_flow_steer = enic_rx_flow_steer,
2256#endif
14747cd9
GV		 2257#ifdef CONFIG_NET_RX_BUSY_POLL
2258 .ndo_busy_poll = enic_busy_poll,
2259#endif
afe29f7a
SH		 2260};
2261
2fdba388 2262static void enic_dev_deinit(struct enic *enic)
6fdfa970 2263{
717258ba
VK		 2264 unsigned int i;
2265
14747cd9
GV		 2266 for (i = 0; i < enic->rq_count; i++) {
2267 napi_hash_del(&enic->napi[i]);
717258ba 2268 netif_napi_del(&enic->napi[i]);
14747cd9 2269 }
4cfe8785
GV		 2270 if (vnic_dev_get_intr_mode(enic->vdev) == VNIC_DEV_INTR_MODE_MSIX)
2271 for (i = 0; i < enic->wq_count; i++)
2272 netif_napi_del(&enic->napi[enic_cq_wq(enic, i)]);
717258ba 2273
6fdfa970
SF		 2274 enic_free_vnic_resources(enic);
2275 enic_clear_intr_mode(enic);
2276}
2277
3f255dcc
GV		 2278static void enic_kdump_kernel_config(struct enic *enic)
2279{
2280 if (is_kdump_kernel()) {
2281 dev_info(enic_get_dev(enic), "Running from within kdump kernel. Using minimal resources\n");
2282 enic->rq_count = 1;
2283 enic->wq_count = 1;
2284 enic->config.rq_desc_count = ENIC_MIN_RQ_DESCS;
2285 enic->config.wq_desc_count = ENIC_MIN_WQ_DESCS;
2286 enic->config.mtu = min_t(u16, 1500, enic->config.mtu);
2287 }
2288}
2289
2fdba388 2290static int enic_dev_init(struct enic *enic)
6fdfa970 2291{
a7a79deb 2292 struct device *dev = enic_get_dev(enic);
6fdfa970 2293 struct net_device *netdev = enic->netdev;
717258ba 2294 unsigned int i;
6fdfa970
SF		 2295 int err;
2296
ea7ea65a
VK		 2297 /* Get interrupt coalesce timer info */
2298 err = enic_dev_intr_coal_timer_info(enic);
2299 if (err) {
2300 dev_warn(dev, "Using default conversion factor for "
2301 "interrupt coalesce timer\n");
2302 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2303 }
2304
6fdfa970
SF		 2305 /* Get vNIC configuration
2306 */
2307
2308 err = enic_get_vnic_config(enic);
2309 if (err) {
a7a79deb 2310 dev_err(dev, "Get vNIC configuration failed, aborting\n");
6fdfa970
SF		 2311 return err;
2312 }
2313
2314 /* Get available resource counts
2315 */
2316
2317 enic_get_res_counts(enic);
2318
3f255dcc
GV		 2319 /* modify resource count if we are in kdump_kernel
2320 */
2321 enic_kdump_kernel_config(enic);
2322
6fdfa970
SF		 2323 /* Set interrupt mode based on resource counts and system
2324 * capabilities
2325 */
2326
2327 err = enic_set_intr_mode(enic);
2328 if (err) {
a7a79deb
VK		 2329 dev_err(dev, "Failed to set intr mode based on resource "
2330 "counts and system capabilities, aborting\n");
6fdfa970
SF		 2331 return err;
2332 }
2333
2334 /* Allocate and configure vNIC resources
2335 */
2336
2337 err = enic_alloc_vnic_resources(enic);
2338 if (err) {
a7a79deb 2339 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
6fdfa970
SF		 2340 goto err_out_free_vnic_resources;
2341 }
2342
2343 enic_init_vnic_resources(enic);
2344
717258ba 2345 err = enic_set_rss_nic_cfg(enic);
6fdfa970 2346 if (err) {
a7a79deb 2347 dev_err(dev, "Failed to config nic, aborting\n");
6fdfa970
SF		 2348 goto err_out_free_vnic_resources;
2349 }
2350
2351 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2352 default:
717258ba 2353 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
14747cd9 2354 napi_hash_add(&enic->napi[0]);
6fdfa970
SF		 2355 break;
2356 case VNIC_DEV_INTR_MODE_MSIX:
14747cd9 2357 for (i = 0; i < enic->rq_count; i++) {
717258ba 2358 netif_napi_add(netdev, &enic->napi[i],
4cfe8785 2359 enic_poll_msix_rq, NAPI_POLL_WEIGHT);
14747cd9
GV		 2360 napi_hash_add(&enic->napi[i]);
2361 }
4cfe8785
GV		 2362 for (i = 0; i < enic->wq_count; i++)
2363 netif_napi_add(netdev, &enic->napi[enic_cq_wq(enic, i)],
2364 enic_poll_msix_wq, NAPI_POLL_WEIGHT);
6fdfa970
SF		 2365 break;
2366 }
2367
2368 return 0;
2369
2370err_out_free_vnic_resources:
2371 enic_clear_intr_mode(enic);
2372 enic_free_vnic_resources(enic);
2373
2374 return err;
2375}
2376
27e6c7d3
SF		 2377static void enic_iounmap(struct enic *enic)
2378{
2379 unsigned int i;
2380
2381 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2382 if (enic->bar[i].vaddr)
2383 iounmap(enic->bar[i].vaddr);
2384}
2385
1dd06ae8 2386static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
01f2e4ea 2387{
a7a79deb 2388 struct device *dev = &pdev->dev;
01f2e4ea
SF		 2389 struct net_device *netdev;
2390 struct enic *enic;
2391 int using_dac = 0;
2392 unsigned int i;
2393 int err;
8749b427
RP		 2394#ifdef CONFIG_PCI_IOV
2395 int pos = 0;
2396#endif
b67f231d 2397 int num_pps = 1;
01f2e4ea 2398
01f2e4ea
SF		 2399 /* Allocate net device structure and initialize. Private
2400 * instance data is initialized to zero.
2401 */
2402
822473b6 2403 netdev = alloc_etherdev_mqs(sizeof(struct enic),
2404 ENIC_RQ_MAX, ENIC_WQ_MAX);
41de8d4c 2405 if (!netdev)
01f2e4ea 2406 return -ENOMEM;
01f2e4ea 2407
01f2e4ea
SF		 2408 pci_set_drvdata(pdev, netdev);
2409
2410 SET_NETDEV_DEV(netdev, &pdev->dev);
2411
2412 enic = netdev_priv(netdev);
2413 enic->netdev = netdev;
2414 enic->pdev = pdev;
2415
2416 /* Setup PCI resources
2417 */
2418
29046f9b 2419 err = pci_enable_device_mem(pdev);
01f2e4ea 2420 if (err) {
a7a79deb 2421 dev_err(dev, "Cannot enable PCI device, aborting\n");
01f2e4ea
SF		 2422 goto err_out_free_netdev;
2423 }
2424
2425 err = pci_request_regions(pdev, DRV_NAME);
2426 if (err) {
a7a79deb 2427 dev_err(dev, "Cannot request PCI regions, aborting\n");
01f2e4ea
SF		 2428 goto err_out_disable_device;
2429 }
2430
2431 pci_set_master(pdev);
2432
2433 /* Query PCI controller on system for DMA addressing
624dbf55 2434 * limitation for the device. Try 64-bit first, and
01f2e4ea
SF		 2435 * fail to 32-bit.
2436 */
2437
624dbf55 2438 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
01f2e4ea 2439 if (err) {
284901a9 2440 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea 2441 if (err) {
a7a79deb 2442 dev_err(dev, "No usable DMA configuration, aborting\n");
01f2e4ea
SF		 2443 goto err_out_release_regions;
2444 }
284901a9 2445 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea 2446 if (err) {
a7a79deb
VK		 2447 dev_err(dev, "Unable to obtain %u-bit DMA "
2448 "for consistent allocations, aborting\n", 32);
01f2e4ea
SF		 2449 goto err_out_release_regions;
2450 }
2451 } else {
624dbf55 2452 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
01f2e4ea 2453 if (err) {
a7a79deb 2454 dev_err(dev, "Unable to obtain %u-bit DMA "
624dbf55 2455 "for consistent allocations, aborting\n", 64);
01f2e4ea
SF		 2456 goto err_out_release_regions;
2457 }
2458 using_dac = 1;
2459 }
2460
27e6c7d3 2461 /* Map vNIC resources from BAR0-5
01f2e4ea
SF		 2462 */
2463
27e6c7d3
SF		 2464 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2465 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2466 continue;
2467 enic->bar[i].len = pci_resource_len(pdev, i);
2468 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2469 if (!enic->bar[i].vaddr) {
a7a79deb 2470 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
27e6c7d3
SF		 2471 err = -ENODEV;
2472 goto err_out_iounmap;
2473 }
2474 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
01f2e4ea
SF		 2475 }
2476
2477 /* Register vNIC device
2478 */
2479
27e6c7d3
SF		 2480 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2481 ARRAY_SIZE(enic->bar));
01f2e4ea 2482 if (!enic->vdev) {
a7a79deb 2483 dev_err(dev, "vNIC registration failed, aborting\n");
01f2e4ea
SF		 2484 err = -ENODEV;
2485 goto err_out_iounmap;
2486 }
2487
8749b427
RP		 2488#ifdef CONFIG_PCI_IOV
2489 /* Get number of subvnics */
2490 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2491 if (pos) {
2492 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
413708bb 2493 &enic->num_vfs);
8749b427
RP		 2494 if (enic->num_vfs) {
2495 err = pci_enable_sriov(pdev, enic->num_vfs);
2496 if (err) {
2497 dev_err(dev, "SRIOV enable failed, aborting."
2498 " pci_enable_sriov() returned %d\n",
2499 err);
2500 goto err_out_vnic_unregister;
2501 }
2502 enic->priv_flags |= ENIC_SRIOV_ENABLED;
b67f231d 2503 num_pps = enic->num_vfs;
8749b427
RP		 2504 }
2505 }
8749b427 2506#endif
ca2b721d 2507
3f192795 2508 /* Allocate structure for port profiles */
a1de2219 2509 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
3f192795 2510 if (!enic->pp) {
3f192795 2511 err = -ENOMEM;
ca2b721d 2512 goto err_out_disable_sriov_pp;
3f192795
RP		 2513 }
2514
01f2e4ea
SF		 2515 /* Issue device open to get device in known state
2516 */
2517
2518 err = enic_dev_open(enic);
2519 if (err) {
a7a79deb 2520 dev_err(dev, "vNIC dev open failed, aborting\n");
ca2b721d 2521 goto err_out_disable_sriov;
01f2e4ea
SF		 2522 }
2523
69161425
VK		 2524 /* Setup devcmd lock
2525 */
2526
2527 spin_lock_init(&enic->devcmd_lock);
0b038566 2528 spin_lock_init(&enic->enic_api_lock);
69161425
VK		 2529
2530 /*
2531 * Set ingress vlan rewrite mode before vnic initialization
2532 */
2533
2534 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2535 if (err) {
2536 dev_err(dev,
2537 "Failed to set ingress vlan rewrite mode, aborting.\n");
2538 goto err_out_dev_close;
2539 }
2540
01f2e4ea
SF		 2541 /* Issue device init to initialize the vnic-to-switch link.
2542 * We'll start with carrier off and wait for link UP
2543 * notification later to turn on carrier. We don't need
2544 * to wait here for the vnic-to-switch link initialization
2545 * to complete; link UP notification is the indication that
2546 * the process is complete.
2547 */
2548
2549 netif_carrier_off(netdev);
2550
a7a79deb
VK		 2551 /* Do not call dev_init for a dynamic vnic.
2552 * For a dynamic vnic, init_prov_info will be
2553 * called later by an upper layer.
2554 */
2555
2b68c181 2556 if (!enic_is_dynamic(enic)) {
f8bd9091
SF		 2557 err = vnic_dev_init(enic->vdev, 0);
2558 if (err) {
a7a79deb 2559 dev_err(dev, "vNIC dev init failed, aborting\n");
f8bd9091
SF		 2560 goto err_out_dev_close;
2561 }
01f2e4ea
SF		 2562 }
2563
6fdfa970 2564 err = enic_dev_init(enic);
01f2e4ea 2565 if (err) {
a7a79deb 2566 dev_err(dev, "Device initialization failed, aborting\n");
01f2e4ea
SF		 2567 goto err_out_dev_close;
2568 }
2569
822473b6 2570 netif_set_real_num_tx_queues(netdev, enic->wq_count);
bf751ba8 2571 netif_set_real_num_rx_queues(netdev, enic->rq_count);
822473b6 2572
383ab92f 2573 /* Setup notification timer, HW reset task, and wq locks
01f2e4ea
SF		 2574 */
2575
2576 init_timer(&enic->notify_timer);
2577 enic->notify_timer.function = enic_notify_timer;
2578 enic->notify_timer.data = (unsigned long)enic;
2579
7c2ce6e6 2580 enic_set_rx_coal_setting(enic);
01f2e4ea 2581 INIT_WORK(&enic->reset, enic_reset);
c97c894d 2582 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
01f2e4ea
SF		 2583
2584 for (i = 0; i < enic->wq_count; i++)
2585 spin_lock_init(&enic->wq_lock[i]);
2586
01f2e4ea
SF		 2587 /* Register net device
2588 */
2589
2590 enic->port_mtu = enic->config.mtu;
2591 (void)enic_change_mtu(netdev, enic->port_mtu);
2592
2593 err = enic_set_mac_addr(netdev, enic->mac_addr);
2594 if (err) {
a7a79deb 2595 dev_err(dev, "Invalid MAC address, aborting\n");
6fdfa970 2596 goto err_out_dev_deinit;
01f2e4ea
SF		 2597 }
2598
7c844599 2599 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
7c2ce6e6
SS		 2600 /* rx coalesce time already got initialized. This gets used
2601 * if adaptive coal is turned off
2602 */
7c844599
SF		 2603 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2604
7335903c 2605 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
f8bd9091
SF		 2606 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2607 else
2608 netdev->netdev_ops = &enic_netdev_ops;
2609
01f2e4ea 2610 netdev->watchdog_timeo = 2 * HZ;
f13bbc2f 2611 enic_set_ethtool_ops(netdev);
01f2e4ea 2612
f646968f 2613 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
1825aca6 2614 if (ENIC_SETTING(enic, LOOP)) {
f646968f 2615 netdev->features &= ~NETIF_F_HW_VLAN_CTAG_TX;
1825aca6
VK		 2616 enic->loop_enable = 1;
2617 enic->loop_tag = enic->config.loop_tag;
2618 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2619 }
01f2e4ea 2620 if (ENIC_SETTING(enic, TXCSUM))
5ec8f9b8 2621 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
01f2e4ea 2622 if (ENIC_SETTING(enic, TSO))
5ec8f9b8 2623 netdev->hw_features |= NETIF_F_TSO |
01f2e4ea 2624 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
bf751ba8 2625 if (ENIC_SETTING(enic, RSS))
2626 netdev->hw_features |= NETIF_F_RXHASH;
5ec8f9b8
MM		 2627 if (ENIC_SETTING(enic, RXCSUM))
2628 netdev->hw_features |= NETIF_F_RXCSUM;
2629
2630 netdev->features |= netdev->hw_features;
2631
a145df23
GV		 2632#ifdef CONFIG_RFS_ACCEL
2633 netdev->hw_features |= NETIF_F_NTUPLE;
2634#endif
2635
01f2e4ea
SF		 2636 if (using_dac)
2637 netdev->features |= NETIF_F_HIGHDMA;
2638
01789349
JP		 2639 netdev->priv_flags |= IFF_UNICAST_FLT;
2640
01f2e4ea
SF		 2641 err = register_netdev(netdev);
2642 if (err) {
a7a79deb 2643 dev_err(dev, "Cannot register net device, aborting\n");
6fdfa970 2644 goto err_out_dev_deinit;
01f2e4ea 2645 }
a03bb56e 2646 enic->rx_copybreak = RX_COPYBREAK_DEFAULT;
01f2e4ea
SF		 2647
2648 return 0;
2649
6fdfa970
SF		 2650err_out_dev_deinit:
2651 enic_dev_deinit(enic);
01f2e4ea
SF		 2652err_out_dev_close:
2653 vnic_dev_close(enic->vdev);
8749b427 2654err_out_disable_sriov:
ca2b721d
RP		 2655 kfree(enic->pp);
2656err_out_disable_sriov_pp:
8749b427
RP		 2657#ifdef CONFIG_PCI_IOV
2658 if (enic_sriov_enabled(enic)) {
2659 pci_disable_sriov(pdev);
2660 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2661 }
01f2e4ea 2662err_out_vnic_unregister:
8749b427 2663#endif
35d87e33 2664 vnic_dev_unregister(enic->vdev);
01f2e4ea
SF		 2665err_out_iounmap:
2666 enic_iounmap(enic);
2667err_out_release_regions:
2668 pci_release_regions(pdev);
2669err_out_disable_device:
2670 pci_disable_device(pdev);
2671err_out_free_netdev:
01f2e4ea
SF		 2672 free_netdev(netdev);
2673
2674 return err;
2675}
2676
854de92f 2677static void enic_remove(struct pci_dev *pdev)
01f2e4ea
SF		 2678{
2679 struct net_device *netdev = pci_get_drvdata(pdev);
2680
2681 if (netdev) {
2682 struct enic *enic = netdev_priv(netdev);
2683
23f333a2 2684 cancel_work_sync(&enic->reset);
c97c894d 2685 cancel_work_sync(&enic->change_mtu_work);
01f2e4ea 2686 unregister_netdev(netdev);
6fdfa970 2687 enic_dev_deinit(enic);
01f2e4ea 2688 vnic_dev_close(enic->vdev);
8749b427
RP		 2689#ifdef CONFIG_PCI_IOV
2690 if (enic_sriov_enabled(enic)) {
2691 pci_disable_sriov(pdev);
2692 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2693 }
2694#endif
3f192795 2695 kfree(enic->pp);
01f2e4ea
SF		 2696 vnic_dev_unregister(enic->vdev);
2697 enic_iounmap(enic);
2698 pci_release_regions(pdev);
2699 pci_disable_device(pdev);
01f2e4ea
SF		 2700 free_netdev(netdev);
2701 }
2702}
2703
2704static struct pci_driver enic_driver = {
2705 .name = DRV_NAME,
2706 .id_table = enic_id_table,
2707 .probe = enic_probe,
854de92f 2708 .remove = enic_remove,
01f2e4ea
SF		 2709};
2710
2711static int __init enic_init_module(void)
2712{
a7a79deb 2713 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
01f2e4ea
SF		 2714
2715 return pci_register_driver(&enic_driver);
2716}
2717
2718static void __exit enic_cleanup_module(void)
2719{
2720 pci_unregister_driver(&enic_driver);
2721}
2722
2723module_init(enic_init_module);
2724module_exit(enic_cleanup_module);
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