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4c352362 | 1 | /* |
2633beb9 | 2 | * Copyright (C) 2015-2017 Netronome Systems, Inc. |
4c352362 JK |
3 | * |
4 | * This software is dual licensed under the GNU General License Version 2, | |
5 | * June 1991 as shown in the file COPYING in the top-level directory of this | |
6 | * source tree or the BSD 2-Clause License provided below. You have the | |
7 | * option to license this software under the complete terms of either license. | |
8 | * | |
9 | * The BSD 2-Clause License: | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or | |
12 | * without modification, are permitted provided that the following | |
13 | * conditions are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above | |
16 | * copyright notice, this list of conditions and the following | |
17 | * disclaimer. | |
18 | * | |
19 | * 2. Redistributions in binary form must reproduce the above | |
20 | * copyright notice, this list of conditions and the following | |
21 | * disclaimer in the documentation and/or other materials | |
22 | * provided with the distribution. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
25 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
26 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
27 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
28 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
29 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
30 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
31 | * SOFTWARE. | |
32 | */ | |
33 | ||
34 | /* | |
35 | * nfp_net.h | |
36 | * Declarations for Netronome network device driver. | |
37 | * Authors: Jakub Kicinski <jakub.kicinski@netronome.com> | |
38 | * Jason McMullan <jason.mcmullan@netronome.com> | |
39 | * Rolf Neugebauer <rolf.neugebauer@netronome.com> | |
40 | */ | |
41 | ||
42 | #ifndef _NFP_NET_H_ | |
43 | #define _NFP_NET_H_ | |
44 | ||
45 | #include <linux/interrupt.h> | |
63461a02 | 46 | #include <linux/list.h> |
4c352362 JK |
47 | #include <linux/netdevice.h> |
48 | #include <linux/pci.h> | |
a1cbaad7 | 49 | #include <linux/io-64-nonatomic-hi-lo.h> |
4c352362 JK |
50 | |
51 | #include "nfp_net_ctrl.h" | |
52 | ||
79c12a75 JK |
53 | #define nn_err(nn, fmt, args...) netdev_err((nn)->dp.netdev, fmt, ## args) |
54 | #define nn_warn(nn, fmt, args...) netdev_warn((nn)->dp.netdev, fmt, ## args) | |
55 | #define nn_info(nn, fmt, args...) netdev_info((nn)->dp.netdev, fmt, ## args) | |
56 | #define nn_dbg(nn, fmt, args...) netdev_dbg((nn)->dp.netdev, fmt, ## args) | |
57 | #define nn_dp_warn(dp, fmt, args...) \ | |
4c352362 JK |
58 | do { \ |
59 | if (unlikely(net_ratelimit())) \ | |
79c12a75 | 60 | netdev_warn((dp)->netdev, fmt, ## args); \ |
4c352362 JK |
61 | } while (0) |
62 | ||
3d780b92 JK |
63 | /* Max time to wait for NFP to respond on updates (in seconds) */ |
64 | #define NFP_NET_POLL_TIMEOUT 5 | |
4c352362 | 65 | |
66860beb JK |
66 | /* Interval for reading offloaded filter stats */ |
67 | #define NFP_NET_STAT_POLL_IVL msecs_to_jiffies(100) | |
68 | ||
4c352362 | 69 | /* Bar allocation */ |
796312cd | 70 | #define NFP_NET_CTRL_BAR 0 |
4c352362 JK |
71 | #define NFP_NET_Q0_BAR 2 |
72 | #define NFP_NET_Q1_BAR 4 /* OBSOLETE */ | |
73 | ||
74 | /* Max bits in DMA address */ | |
75 | #define NFP_NET_MAX_DMA_BITS 40 | |
76 | ||
77 | /* Default size for MTU and freelist buffer sizes */ | |
78 | #define NFP_NET_DEFAULT_MTU 1500 | |
4c352362 JK |
79 | |
80 | /* Maximum number of bytes prepended to a packet */ | |
81 | #define NFP_NET_MAX_PREPEND 64 | |
82 | ||
83 | /* Interrupt definitions */ | |
84 | #define NFP_NET_NON_Q_VECTORS 2 | |
85 | #define NFP_NET_IRQ_LSC_IDX 0 | |
86 | #define NFP_NET_IRQ_EXN_IDX 1 | |
d4e7f092 | 87 | #define NFP_NET_MIN_VNIC_IRQS (NFP_NET_NON_Q_VECTORS + 1) |
4c352362 JK |
88 | |
89 | /* Queue/Ring definitions */ | |
90 | #define NFP_NET_MAX_TX_RINGS 64 /* Max. # of Tx rings per device */ | |
91 | #define NFP_NET_MAX_RX_RINGS 64 /* Max. # of Rx rings per device */ | |
23a4e389 JK |
92 | #define NFP_NET_MAX_R_VECS (NFP_NET_MAX_TX_RINGS > NFP_NET_MAX_RX_RINGS ? \ |
93 | NFP_NET_MAX_TX_RINGS : NFP_NET_MAX_RX_RINGS) | |
94 | #define NFP_NET_MAX_IRQS (NFP_NET_NON_Q_VECTORS + NFP_NET_MAX_R_VECS) | |
4c352362 JK |
95 | |
96 | #define NFP_NET_MIN_TX_DESCS 256 /* Min. # of Tx descs per ring */ | |
97 | #define NFP_NET_MIN_RX_DESCS 256 /* Min. # of Rx descs per ring */ | |
98 | #define NFP_NET_MAX_TX_DESCS (256 * 1024) /* Max. # of Tx descs per ring */ | |
99 | #define NFP_NET_MAX_RX_DESCS (256 * 1024) /* Max. # of Rx descs per ring */ | |
100 | ||
101 | #define NFP_NET_TX_DESCS_DEFAULT 4096 /* Default # of Tx descs per ring */ | |
102 | #define NFP_NET_RX_DESCS_DEFAULT 4096 /* Default # of Rx descs per ring */ | |
103 | ||
104 | #define NFP_NET_FL_BATCH 16 /* Add freelist in this Batch size */ | |
abeeec4a | 105 | #define NFP_NET_XDP_MAX_COMPLETE 2048 /* XDP bufs to reclaim in NAPI poll */ |
4c352362 JK |
106 | |
107 | /* Offload definitions */ | |
108 | #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) | |
109 | ||
c0f031bc JK |
110 | #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) |
111 | #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \ | |
112 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) | |
113 | ||
4c352362 | 114 | /* Forward declarations */ |
bd5ca062 | 115 | struct nfp_cpp; |
47465aed | 116 | struct nfp_eth_table_port; |
4c352362 JK |
117 | struct nfp_net; |
118 | struct nfp_net_r_vector; | |
eb488c26 | 119 | struct nfp_port; |
4c352362 | 120 | |
4aa3b766 JK |
121 | /* Convenience macro for wrapping descriptor index on ring size */ |
122 | #define D_IDX(ring, idx) ((idx) & ((ring)->cnt - 1)) | |
123 | ||
4c352362 JK |
124 | /* Convenience macro for writing dma address into RX/TX descriptors */ |
125 | #define nfp_desc_set_dma_addr(desc, dma_addr) \ | |
126 | do { \ | |
127 | __typeof(desc) __d = (desc); \ | |
128 | dma_addr_t __addr = (dma_addr); \ | |
129 | \ | |
130 | __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ | |
131 | __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ | |
132 | } while (0) | |
133 | ||
134 | /* TX descriptor format */ | |
135 | ||
136 | #define PCIE_DESC_TX_EOP BIT(7) | |
137 | #define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) | |
138 | #define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) | |
139 | ||
140 | /* Flags in the host TX descriptor */ | |
141 | #define PCIE_DESC_TX_CSUM BIT(7) | |
142 | #define PCIE_DESC_TX_IP4_CSUM BIT(6) | |
143 | #define PCIE_DESC_TX_TCP_CSUM BIT(5) | |
144 | #define PCIE_DESC_TX_UDP_CSUM BIT(4) | |
145 | #define PCIE_DESC_TX_VLAN BIT(3) | |
146 | #define PCIE_DESC_TX_LSO BIT(2) | |
147 | #define PCIE_DESC_TX_ENCAP BIT(1) | |
148 | #define PCIE_DESC_TX_O_IP4_CSUM BIT(0) | |
149 | ||
150 | struct nfp_net_tx_desc { | |
151 | union { | |
152 | struct { | |
153 | u8 dma_addr_hi; /* High bits of host buf address */ | |
154 | __le16 dma_len; /* Length to DMA for this desc */ | |
155 | u8 offset_eop; /* Offset in buf where pkt starts + | |
156 | * highest bit is eop flag. | |
157 | */ | |
158 | __le32 dma_addr_lo; /* Low 32bit of host buf addr */ | |
159 | ||
160 | __le16 mss; /* MSS to be used for LSO */ | |
e53fc9fa | 161 | u8 lso_hdrlen; /* LSO, TCP payload offset */ |
4c352362 | 162 | u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ |
28063be6 EP |
163 | union { |
164 | struct { | |
165 | u8 l3_offset; /* L3 header offset */ | |
166 | u8 l4_offset; /* L4 header offset */ | |
167 | }; | |
168 | __le16 vlan; /* VLAN tag to add if indicated */ | |
169 | }; | |
4c352362 JK |
170 | __le16 data_len; /* Length of frame + meta data */ |
171 | } __packed; | |
172 | __le32 vals[4]; | |
173 | }; | |
174 | }; | |
175 | ||
176 | /** | |
177 | * struct nfp_net_tx_buf - software TX buffer descriptor | |
178 | * @skb: sk_buff associated with this buffer | |
179 | * @dma_addr: DMA mapping address of the buffer | |
180 | * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) | |
181 | * @pkt_cnt: Number of packets to be produced out of the skb associated | |
182 | * with this buffer (valid only on the head's buffer). | |
183 | * Will be 1 for all non-TSO packets. | |
184 | * @real_len: Number of bytes which to be produced out of the skb (valid only | |
185 | * on the head's buffer). Equal to skb->len for non-TSO packets. | |
186 | */ | |
187 | struct nfp_net_tx_buf { | |
ecd63a02 JK |
188 | union { |
189 | struct sk_buff *skb; | |
190 | void *frag; | |
191 | }; | |
4c352362 JK |
192 | dma_addr_t dma_addr; |
193 | short int fidx; | |
194 | u16 pkt_cnt; | |
195 | u32 real_len; | |
196 | }; | |
197 | ||
198 | /** | |
199 | * struct nfp_net_tx_ring - TX ring structure | |
200 | * @r_vec: Back pointer to ring vector structure | |
201 | * @idx: Ring index from Linux's perspective | |
202 | * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue | |
203 | * @qcp_q: Pointer to base of the QCP TX queue | |
204 | * @cnt: Size of the queue in number of descriptors | |
205 | * @wr_p: TX ring write pointer (free running) | |
206 | * @rd_p: TX ring read pointer (free running) | |
207 | * @qcp_rd_p: Local copy of QCP TX queue read pointer | |
208 | * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer | |
209 | * (used for .xmit_more delayed kick) | |
210 | * @txbufs: Array of transmitted TX buffers, to free on transmit | |
211 | * @txds: Virtual address of TX ring in host memory | |
212 | * @dma: DMA address of the TX ring | |
213 | * @size: Size, in bytes, of the TX ring (needed to free) | |
92e68195 | 214 | * @is_xdp: Is this a XDP TX ring? |
4c352362 JK |
215 | */ |
216 | struct nfp_net_tx_ring { | |
217 | struct nfp_net_r_vector *r_vec; | |
218 | ||
219 | u32 idx; | |
220 | int qcidx; | |
221 | u8 __iomem *qcp_q; | |
222 | ||
223 | u32 cnt; | |
224 | u32 wr_p; | |
225 | u32 rd_p; | |
226 | u32 qcp_rd_p; | |
227 | ||
228 | u32 wr_ptr_add; | |
229 | ||
230 | struct nfp_net_tx_buf *txbufs; | |
231 | struct nfp_net_tx_desc *txds; | |
232 | ||
233 | dma_addr_t dma; | |
234 | unsigned int size; | |
92e68195 | 235 | bool is_xdp; |
4c352362 JK |
236 | } ____cacheline_aligned; |
237 | ||
238 | /* RX and freelist descriptor format */ | |
239 | ||
240 | #define PCIE_DESC_RX_DD BIT(7) | |
241 | #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) | |
242 | ||
243 | /* Flags in the RX descriptor */ | |
244 | #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) | |
245 | #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) | |
246 | #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) | |
247 | #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) | |
248 | #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) | |
249 | #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) | |
250 | #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) | |
7533fdc0 | 251 | #define PCIE_DESC_RX_BPF cpu_to_le16(BIT(8)) |
4c352362 JK |
252 | #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) |
253 | #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) | |
254 | #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) | |
255 | #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) | |
256 | #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) | |
257 | #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) | |
258 | #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) | |
259 | #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) | |
260 | ||
261 | #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ | |
262 | PCIE_DESC_RX_TCP_CSUM | \ | |
263 | PCIE_DESC_RX_UDP_CSUM | \ | |
264 | PCIE_DESC_RX_I_IP4_CSUM | \ | |
265 | PCIE_DESC_RX_I_TCP_CSUM | \ | |
266 | PCIE_DESC_RX_I_UDP_CSUM) | |
267 | #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 | |
268 | #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) | |
269 | #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ | |
270 | PCIE_DESC_RX_CSUM_OK_SHIFT) | |
271 | ||
272 | struct nfp_net_rx_desc { | |
273 | union { | |
274 | struct { | |
275 | u8 dma_addr_hi; /* High bits of the buf address */ | |
276 | __le16 reserved; /* Must be zero */ | |
277 | u8 meta_len_dd; /* Must be zero */ | |
278 | ||
279 | __le32 dma_addr_lo; /* Low bits of the buffer address */ | |
280 | } __packed fld; | |
281 | ||
282 | struct { | |
283 | __le16 data_len; /* Length of the frame + meta data */ | |
284 | u8 reserved; | |
285 | u8 meta_len_dd; /* Length of meta data prepended + | |
286 | * descriptor done flag. | |
287 | */ | |
288 | ||
289 | __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ | |
290 | __le16 vlan; /* VLAN if stripped */ | |
291 | } __packed rxd; | |
292 | ||
293 | __le32 vals[2]; | |
294 | }; | |
295 | }; | |
296 | ||
19d0f54e JK |
297 | #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) |
298 | ||
e524a6a9 | 299 | struct nfp_meta_parsed { |
ddb98d94 JK |
300 | u8 hash_type; |
301 | u8 csum_type; | |
e524a6a9 JK |
302 | u32 hash; |
303 | u32 mark; | |
ddb98d94 | 304 | __wsum csum; |
e524a6a9 JK |
305 | }; |
306 | ||
4c352362 JK |
307 | struct nfp_net_rx_hash { |
308 | __be32 hash_type; | |
309 | __be32 hash; | |
310 | }; | |
311 | ||
312 | /** | |
313 | * struct nfp_net_rx_buf - software RX buffer descriptor | |
c0f031bc | 314 | * @frag: page fragment buffer |
4c352362 JK |
315 | * @dma_addr: DMA mapping address of the buffer |
316 | */ | |
317 | struct nfp_net_rx_buf { | |
c0f031bc | 318 | void *frag; |
4c352362 JK |
319 | dma_addr_t dma_addr; |
320 | }; | |
321 | ||
322 | /** | |
323 | * struct nfp_net_rx_ring - RX ring structure | |
324 | * @r_vec: Back pointer to ring vector structure | |
325 | * @cnt: Size of the queue in number of descriptors | |
326 | * @wr_p: FL/RX ring write pointer (free running) | |
327 | * @rd_p: FL/RX ring read pointer (free running) | |
328 | * @idx: Ring index from Linux's perspective | |
329 | * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist | |
4c352362 | 330 | * @qcp_fl: Pointer to base of the QCP freelist queue |
4c352362 JK |
331 | * @rxbufs: Array of transmitted FL/RX buffers |
332 | * @rxds: Virtual address of FL/RX ring in host memory | |
333 | * @dma: DMA address of the FL/RX ring | |
334 | * @size: Size, in bytes, of the FL/RX ring (needed to free) | |
335 | */ | |
336 | struct nfp_net_rx_ring { | |
337 | struct nfp_net_r_vector *r_vec; | |
338 | ||
339 | u32 cnt; | |
340 | u32 wr_p; | |
341 | u32 rd_p; | |
342 | ||
83d08a1d | 343 | u32 idx; |
4c352362 JK |
344 | |
345 | int fl_qcidx; | |
4c352362 | 346 | u8 __iomem *qcp_fl; |
4c352362 JK |
347 | |
348 | struct nfp_net_rx_buf *rxbufs; | |
349 | struct nfp_net_rx_desc *rxds; | |
350 | ||
351 | dma_addr_t dma; | |
352 | unsigned int size; | |
353 | } ____cacheline_aligned; | |
354 | ||
355 | /** | |
356 | * struct nfp_net_r_vector - Per ring interrupt vector configuration | |
357 | * @nfp_net: Backpointer to nfp_net structure | |
358 | * @napi: NAPI structure for this ring vec | |
359 | * @tx_ring: Pointer to TX ring | |
360 | * @rx_ring: Pointer to RX ring | |
ecd63a02 | 361 | * @xdp_ring: Pointer to an extra TX ring for XDP |
fdace6c2 | 362 | * @irq_entry: MSI-X table entry (use for talking to the device) |
4c352362 JK |
363 | * @rx_sync: Seqlock for atomic updates of RX stats |
364 | * @rx_pkts: Number of received packets | |
365 | * @rx_bytes: Number of received bytes | |
366 | * @rx_drops: Number of packets dropped on RX due to lack of resources | |
367 | * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK | |
368 | * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK | |
369 | * @hw_csum_rx_error: Counter of packets with bad checksums | |
370 | * @tx_sync: Seqlock for atomic updates of TX stats | |
371 | * @tx_pkts: Number of Transmitted packets | |
372 | * @tx_bytes: Number of Transmitted bytes | |
373 | * @hw_csum_tx: Counter of packets with TX checksum offload requested | |
374 | * @hw_csum_tx_inner: Counter of inner TX checksum offload requests | |
375 | * @tx_gather: Counter of packets with Gather DMA | |
376 | * @tx_lso: Counter of LSO packets sent | |
377 | * @tx_errors: How many TX errors were encountered | |
378 | * @tx_busy: How often was TX busy (no space)? | |
fdace6c2 | 379 | * @irq_vector: Interrupt vector number (use for talking to the OS) |
4c352362 JK |
380 | * @handler: Interrupt handler for this ring vector |
381 | * @name: Name of the interrupt vector | |
382 | * @affinity_mask: SMP affinity mask for this vector | |
383 | * | |
384 | * This structure ties RX and TX rings to interrupt vectors and a NAPI | |
385 | * context. This currently only supports one RX and TX ring per | |
386 | * interrupt vector but might be extended in the future to allow | |
387 | * association of multiple rings per vector. | |
388 | */ | |
389 | struct nfp_net_r_vector { | |
390 | struct nfp_net *nfp_net; | |
391 | struct napi_struct napi; | |
392 | ||
393 | struct nfp_net_tx_ring *tx_ring; | |
394 | struct nfp_net_rx_ring *rx_ring; | |
395 | ||
fdace6c2 | 396 | u16 irq_entry; |
4c352362 JK |
397 | |
398 | struct u64_stats_sync rx_sync; | |
399 | u64 rx_pkts; | |
400 | u64 rx_bytes; | |
401 | u64 rx_drops; | |
402 | u64 hw_csum_rx_ok; | |
403 | u64 hw_csum_rx_inner_ok; | |
404 | u64 hw_csum_rx_error; | |
405 | ||
ecd63a02 JK |
406 | struct nfp_net_tx_ring *xdp_ring; |
407 | ||
4c352362 JK |
408 | struct u64_stats_sync tx_sync; |
409 | u64 tx_pkts; | |
410 | u64 tx_bytes; | |
411 | u64 hw_csum_tx; | |
412 | u64 hw_csum_tx_inner; | |
413 | u64 tx_gather; | |
414 | u64 tx_lso; | |
415 | u64 tx_errors; | |
416 | u64 tx_busy; | |
417 | ||
fdace6c2 | 418 | u32 irq_vector; |
4c352362 JK |
419 | irq_handler_t handler; |
420 | char name[IFNAMSIZ + 8]; | |
421 | cpumask_t affinity_mask; | |
422 | } ____cacheline_aligned; | |
423 | ||
424 | /* Firmware version as it is written in the 32bit value in the BAR */ | |
425 | struct nfp_net_fw_version { | |
426 | u8 minor; | |
427 | u8 major; | |
428 | u8 class; | |
429 | u8 resv; | |
430 | } __packed; | |
431 | ||
432 | static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, | |
433 | u8 resv, u8 class, u8 major, u8 minor) | |
434 | { | |
435 | return fw_ver->resv == resv && | |
436 | fw_ver->class == class && | |
437 | fw_ver->major == major && | |
438 | fw_ver->minor == minor; | |
439 | } | |
440 | ||
66860beb JK |
441 | struct nfp_stat_pair { |
442 | u64 pkts; | |
443 | u64 bytes; | |
444 | }; | |
445 | ||
4c352362 | 446 | /** |
79c12a75 | 447 | * struct nfp_net_dp - NFP network device datapath data structure |
fa43d2a8 | 448 | * @dev: Backpointer to struct device |
79c12a75 JK |
449 | * @netdev: Backpointer to net_device structure |
450 | * @is_vf: Is the driver attached to a VF? | |
7533fdc0 | 451 | * @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf |
6d677075 | 452 | * @bpf_offload_xdp: Offloaded BPF program is XDP |
b9dcf88a | 453 | * @chained_metadata_format: Firemware will use new metadata format |
c487e6b1 | 454 | * @rx_dma_dir: Mapping direction for RX buffers |
6fe0c3b4 | 455 | * @rx_dma_off: Offset at which DMA packets (for XDP headroom) |
97717aca | 456 | * @rx_offset: Offset in the RX buffers where packet data starts |
79c12a75 JK |
457 | * @ctrl: Local copy of the control register/word. |
458 | * @fl_bufsz: Currently configured size of the freelist buffers | |
ecd63a02 | 459 | * @xdp_prog: Installed XDP program |
79c12a75 JK |
460 | * @tx_rings: Array of pre-allocated TX ring structures |
461 | * @rx_rings: Array of pre-allocated RX ring structures | |
d2b84397 | 462 | * @ctrl_bar: Pointer to mapped control BAR |
79c12a75 JK |
463 | * |
464 | * @txd_cnt: Size of the TX ring in number of descriptors | |
465 | * @rxd_cnt: Size of the RX ring in number of descriptors | |
466 | * @num_r_vecs: Number of used ring vectors | |
467 | * @num_tx_rings: Currently configured number of TX rings | |
468 | * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) | |
469 | * @num_rx_rings: Currently configured number of RX rings | |
76e1e1a8 | 470 | * @mtu: Device MTU |
79c12a75 JK |
471 | */ |
472 | struct nfp_net_dp { | |
473 | struct device *dev; | |
474 | struct net_device *netdev; | |
475 | ||
c487e6b1 JK |
476 | u8 is_vf:1; |
477 | u8 bpf_offload_skip_sw:1; | |
478 | u8 bpf_offload_xdp:1; | |
479 | u8 chained_metadata_format:1; | |
480 | ||
481 | u8 rx_dma_dir; | |
97717aca JK |
482 | u8 rx_offset; |
483 | ||
dbf637ff JK |
484 | u32 rx_dma_off; |
485 | ||
79c12a75 JK |
486 | u32 ctrl; |
487 | u32 fl_bufsz; | |
488 | ||
79c12a75 JK |
489 | struct bpf_prog *xdp_prog; |
490 | ||
491 | struct nfp_net_tx_ring *tx_rings; | |
492 | struct nfp_net_rx_ring *rx_rings; | |
493 | ||
d2b84397 JK |
494 | u8 __iomem *ctrl_bar; |
495 | ||
79c12a75 JK |
496 | /* Cold data follows */ |
497 | ||
498 | unsigned int txd_cnt; | |
499 | unsigned int rxd_cnt; | |
500 | ||
501 | unsigned int num_r_vecs; | |
502 | ||
503 | unsigned int num_tx_rings; | |
504 | unsigned int num_stack_tx_rings; | |
505 | unsigned int num_rx_rings; | |
76e1e1a8 JK |
506 | |
507 | unsigned int mtu; | |
79c12a75 JK |
508 | }; |
509 | ||
510 | /** | |
511 | * struct nfp_net - NFP network device structure | |
512 | * @dp: Datapath structure | |
513 | * @fw_ver: Firmware version | |
4c352362 JK |
514 | * @cap: Capabilities advertised by the Firmware |
515 | * @max_mtu: Maximum support MTU advertised by the Firmware | |
9ff304bf | 516 | * @rss_hfunc: RSS selected hash function |
4c352362 JK |
517 | * @rss_cfg: RSS configuration |
518 | * @rss_key: RSS secret key | |
519 | * @rss_itbl: RSS indirection table | |
66860beb JK |
520 | * @rx_filter: Filter offload statistics - dropped packets/bytes |
521 | * @rx_filter_prev: Filter offload statistics - values from previous update | |
522 | * @rx_filter_change: Jiffies when statistics last changed | |
523 | * @rx_filter_stats_timer: Timer for polling filter offload statistics | |
524 | * @rx_filter_lock: Lock protecting timer state changes (teardown) | |
79c12a75 | 525 | * @max_r_vecs: Number of allocated interrupt vectors for RX/TX |
4c352362 JK |
526 | * @max_tx_rings: Maximum number of TX rings supported by the Firmware |
527 | * @max_rx_rings: Maximum number of RX rings supported by the Firmware | |
4c352362 JK |
528 | * @r_vecs: Pre-allocated array of ring vectors |
529 | * @irq_entries: Pre-allocated array of MSI-X entries | |
530 | * @lsc_handler: Handler for Link State Change interrupt | |
531 | * @lsc_name: Name for Link State Change interrupt | |
532 | * @exn_handler: Handler for Exception interrupt | |
533 | * @exn_name: Name for Exception interrupt | |
534 | * @shared_handler: Handler for shared interrupts | |
535 | * @shared_name: Name for shared interrupt | |
536 | * @me_freq_mhz: ME clock_freq (MHz) | |
537 | * @reconfig_lock: Protects HW reconfiguration request regs/machinery | |
3d780b92 JK |
538 | * @reconfig_posted: Pending reconfig bits coming from async sources |
539 | * @reconfig_timer_active: Timer for reading reconfiguration results is pending | |
540 | * @reconfig_sync_present: Some thread is performing synchronous reconfig | |
541 | * @reconfig_timer: Timer for async reading of reconfig results | |
4c352362 | 542 | * @link_up: Is the link up? |
cee42951 | 543 | * @link_status_lock: Protects @link_* and ensures atomicity with BAR reading |
4c352362 JK |
544 | * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter |
545 | * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter | |
546 | * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter | |
547 | * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter | |
548 | * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW | |
549 | * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts | |
550 | * @qcp_cfg: Pointer to QCP queue used for configuration notification | |
4c352362 JK |
551 | * @tx_bar: Pointer to mapped TX queues |
552 | * @rx_bar: Pointer to mapped FL/RX queues | |
553 | * @debugfs_dir: Device directory in debugfs | |
af623682 | 554 | * @ethtool_dump_flag: Ethtool dump flag |
d4e7f092 | 555 | * @vnic_list: Entry on device vNIC list |
fa43d2a8 | 556 | * @pdev: Backpointer to PCI device |
7ac9ebd5 | 557 | * @app: APP handle if available |
eb488c26 | 558 | * @port: Pointer to nfp_port structure if vNIC is a port |
4c352362 JK |
559 | */ |
560 | struct nfp_net { | |
79c12a75 | 561 | struct nfp_net_dp dp; |
73725d9d | 562 | |
4c352362 | 563 | struct nfp_net_fw_version fw_ver; |
79c12a75 | 564 | |
4c352362 JK |
565 | u32 cap; |
566 | u32 max_mtu; | |
567 | ||
9ff304bf | 568 | u8 rss_hfunc; |
4c352362 JK |
569 | u32 rss_cfg; |
570 | u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; | |
571 | u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; | |
572 | ||
66860beb JK |
573 | struct nfp_stat_pair rx_filter, rx_filter_prev; |
574 | unsigned long rx_filter_change; | |
575 | struct timer_list rx_filter_stats_timer; | |
576 | spinlock_t rx_filter_lock; | |
577 | ||
a4b562bb JK |
578 | unsigned int max_tx_rings; |
579 | unsigned int max_rx_rings; | |
4c352362 | 580 | |
4c352362 JK |
581 | int stride_tx; |
582 | int stride_rx; | |
583 | ||
b33ae997 | 584 | unsigned int max_r_vecs; |
23a4e389 JK |
585 | struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS]; |
586 | struct msix_entry irq_entries[NFP_NET_MAX_IRQS]; | |
4c352362 JK |
587 | |
588 | irq_handler_t lsc_handler; | |
589 | char lsc_name[IFNAMSIZ + 8]; | |
590 | ||
591 | irq_handler_t exn_handler; | |
592 | char exn_name[IFNAMSIZ + 8]; | |
593 | ||
594 | irq_handler_t shared_handler; | |
595 | char shared_name[IFNAMSIZ + 8]; | |
596 | ||
597 | u32 me_freq_mhz; | |
598 | ||
599 | bool link_up; | |
600 | spinlock_t link_status_lock; | |
601 | ||
602 | spinlock_t reconfig_lock; | |
3d780b92 JK |
603 | u32 reconfig_posted; |
604 | bool reconfig_timer_active; | |
605 | bool reconfig_sync_present; | |
606 | struct timer_list reconfig_timer; | |
4c352362 JK |
607 | |
608 | u32 rx_coalesce_usecs; | |
609 | u32 rx_coalesce_max_frames; | |
610 | u32 tx_coalesce_usecs; | |
611 | u32 tx_coalesce_max_frames; | |
612 | ||
613 | __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; | |
614 | u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; | |
615 | ||
616 | u8 __iomem *qcp_cfg; | |
617 | ||
4c352362 JK |
618 | u8 __iomem *tx_bar; |
619 | u8 __iomem *rx_bar; | |
620 | ||
621 | struct dentry *debugfs_dir; | |
af623682 | 622 | u32 ethtool_dump_flag; |
63461a02 | 623 | |
d4e7f092 | 624 | struct list_head vnic_list; |
bd5ca062 | 625 | |
fa43d2a8 | 626 | struct pci_dev *pdev; |
7ac9ebd5 | 627 | struct nfp_app *app; |
47465aed | 628 | |
eb488c26 | 629 | struct nfp_port *port; |
4c352362 JK |
630 | }; |
631 | ||
632 | /* Functions to read/write from/to a BAR | |
633 | * Performs any endian conversion necessary. | |
634 | */ | |
7533fdc0 JK |
635 | static inline u16 nn_readb(struct nfp_net *nn, int off) |
636 | { | |
d2b84397 | 637 | return readb(nn->dp.ctrl_bar + off); |
7533fdc0 JK |
638 | } |
639 | ||
4c352362 JK |
640 | static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) |
641 | { | |
d2b84397 | 642 | writeb(val, nn->dp.ctrl_bar + off); |
4c352362 JK |
643 | } |
644 | ||
7533fdc0 JK |
645 | static inline u16 nn_readw(struct nfp_net *nn, int off) |
646 | { | |
d2b84397 | 647 | return readw(nn->dp.ctrl_bar + off); |
7533fdc0 JK |
648 | } |
649 | ||
650 | static inline void nn_writew(struct nfp_net *nn, int off, u16 val) | |
651 | { | |
d2b84397 | 652 | writew(val, nn->dp.ctrl_bar + off); |
7533fdc0 | 653 | } |
4c352362 JK |
654 | |
655 | static inline u32 nn_readl(struct nfp_net *nn, int off) | |
656 | { | |
d2b84397 | 657 | return readl(nn->dp.ctrl_bar + off); |
4c352362 JK |
658 | } |
659 | ||
660 | static inline void nn_writel(struct nfp_net *nn, int off, u32 val) | |
661 | { | |
d2b84397 | 662 | writel(val, nn->dp.ctrl_bar + off); |
4c352362 JK |
663 | } |
664 | ||
665 | static inline u64 nn_readq(struct nfp_net *nn, int off) | |
666 | { | |
d2b84397 | 667 | return readq(nn->dp.ctrl_bar + off); |
4c352362 JK |
668 | } |
669 | ||
670 | static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) | |
671 | { | |
d2b84397 | 672 | writeq(val, nn->dp.ctrl_bar + off); |
4c352362 JK |
673 | } |
674 | ||
675 | /* Flush posted PCI writes by reading something without side effects */ | |
676 | static inline void nn_pci_flush(struct nfp_net *nn) | |
677 | { | |
678 | nn_readl(nn, NFP_NET_CFG_VERSION); | |
679 | } | |
680 | ||
681 | /* Queue Controller Peripheral access functions and definitions. | |
682 | * | |
683 | * Some of the BARs of the NFP are mapped to portions of the Queue | |
684 | * Controller Peripheral (QCP) address space on the NFP. A QCP queue | |
685 | * has a read and a write pointer (as well as a size and flags, | |
686 | * indicating overflow etc). The QCP offers a number of different | |
687 | * operation on queue pointers, but here we only offer function to | |
688 | * either add to a pointer or to read the pointer value. | |
689 | */ | |
690 | #define NFP_QCP_QUEUE_ADDR_SZ 0x800 | |
691 | #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) | |
692 | #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 | |
693 | #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 | |
694 | #define NFP_QCP_QUEUE_STS_LO 0x0008 | |
695 | #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff | |
696 | #define NFP_QCP_QUEUE_STS_HI 0x000c | |
697 | #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff | |
698 | ||
416db5c1 | 699 | /* The offset of a QCP queues in the PCIe Target */ |
4c352362 JK |
700 | #define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) |
701 | ||
702 | /* nfp_qcp_ptr - Read or Write Pointer of a queue */ | |
703 | enum nfp_qcp_ptr { | |
704 | NFP_QCP_READ_PTR = 0, | |
705 | NFP_QCP_WRITE_PTR | |
706 | }; | |
707 | ||
708 | /* There appear to be an *undocumented* upper limit on the value which | |
709 | * one can add to a queue and that value is either 0x3f or 0x7f. We | |
710 | * go with 0x3f as a conservative measure. | |
711 | */ | |
712 | #define NFP_QCP_MAX_ADD 0x3f | |
713 | ||
714 | static inline void _nfp_qcp_ptr_add(u8 __iomem *q, | |
715 | enum nfp_qcp_ptr ptr, u32 val) | |
716 | { | |
717 | u32 off; | |
718 | ||
719 | if (ptr == NFP_QCP_READ_PTR) | |
720 | off = NFP_QCP_QUEUE_ADD_RPTR; | |
721 | else | |
722 | off = NFP_QCP_QUEUE_ADD_WPTR; | |
723 | ||
724 | while (val > NFP_QCP_MAX_ADD) { | |
725 | writel(NFP_QCP_MAX_ADD, q + off); | |
726 | val -= NFP_QCP_MAX_ADD; | |
727 | } | |
728 | ||
729 | writel(val, q + off); | |
730 | } | |
731 | ||
732 | /** | |
733 | * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue | |
734 | * | |
735 | * @q: Base address for queue structure | |
736 | * @val: Value to add to the queue pointer | |
737 | * | |
738 | * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. | |
739 | */ | |
740 | static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) | |
741 | { | |
742 | _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); | |
743 | } | |
744 | ||
745 | /** | |
746 | * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue | |
747 | * | |
748 | * @q: Base address for queue structure | |
749 | * @val: Value to add to the queue pointer | |
750 | * | |
751 | * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. | |
752 | */ | |
753 | static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) | |
754 | { | |
755 | _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); | |
756 | } | |
757 | ||
758 | static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) | |
759 | { | |
760 | u32 off; | |
761 | u32 val; | |
762 | ||
763 | if (ptr == NFP_QCP_READ_PTR) | |
764 | off = NFP_QCP_QUEUE_STS_LO; | |
765 | else | |
766 | off = NFP_QCP_QUEUE_STS_HI; | |
767 | ||
768 | val = readl(q + off); | |
769 | ||
770 | if (ptr == NFP_QCP_READ_PTR) | |
771 | return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; | |
772 | else | |
773 | return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; | |
774 | } | |
775 | ||
776 | /** | |
777 | * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue | |
778 | * @q: Base address for queue structure | |
779 | * | |
780 | * Return: Value read. | |
781 | */ | |
782 | static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) | |
783 | { | |
784 | return _nfp_qcp_read(q, NFP_QCP_READ_PTR); | |
785 | } | |
786 | ||
787 | /** | |
788 | * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue | |
789 | * @q: Base address for queue structure | |
790 | * | |
791 | * Return: Value read. | |
792 | */ | |
793 | static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) | |
794 | { | |
795 | return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); | |
796 | } | |
797 | ||
798 | /* Globals */ | |
2633beb9 | 799 | extern const char nfp_driver_version[]; |
4c352362 | 800 | |
eb488c26 JK |
801 | extern const struct net_device_ops nfp_net_netdev_ops; |
802 | ||
803 | static inline bool nfp_netdev_is_nfp_net(struct net_device *netdev) | |
804 | { | |
805 | return netdev->netdev_ops == &nfp_net_netdev_ops; | |
806 | } | |
807 | ||
4c352362 JK |
808 | /* Prototypes */ |
809 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
810 | void __iomem *ctrl_bar); | |
811 | ||
a4b562bb | 812 | struct nfp_net * |
beba69ca JK |
813 | nfp_net_alloc(struct pci_dev *pdev, |
814 | unsigned int max_tx_rings, unsigned int max_rx_rings); | |
815 | void nfp_net_free(struct nfp_net *nn); | |
816 | ||
817 | int nfp_net_init(struct nfp_net *nn); | |
818 | void nfp_net_clean(struct nfp_net *nn); | |
819 | ||
4c352362 JK |
820 | void nfp_net_set_ethtool_ops(struct net_device *netdev); |
821 | void nfp_net_info(struct nfp_net *nn); | |
822 | int nfp_net_reconfig(struct nfp_net *nn, u32 update); | |
9ff304bf | 823 | unsigned int nfp_net_rss_key_sz(struct nfp_net *nn); |
4c352362 JK |
824 | void nfp_net_rss_write_itbl(struct nfp_net *nn); |
825 | void nfp_net_rss_write_key(struct nfp_net *nn); | |
826 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn); | |
fdace6c2 JK |
827 | |
828 | unsigned int | |
829 | nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, | |
830 | unsigned int min_irqs, unsigned int want_irqs); | |
831 | void nfp_net_irqs_disable(struct pci_dev *pdev); | |
832 | void | |
833 | nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, | |
834 | unsigned int n); | |
783496b0 JK |
835 | |
836 | struct nfp_net_dp *nfp_net_clone_dp(struct nfp_net *nn); | |
d957c0f7 JK |
837 | int nfp_net_ring_reconfig(struct nfp_net *nn, struct nfp_net_dp *new, |
838 | struct netlink_ext_ack *extack); | |
4c352362 | 839 | |
2633beb9 | 840 | #ifdef CONFIG_NFP_DEBUG |
4c352362 JK |
841 | void nfp_net_debugfs_create(void); |
842 | void nfp_net_debugfs_destroy(void); | |
6f1cd5ca | 843 | struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); |
d4e7f092 | 844 | void nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id); |
6f1cd5ca | 845 | void nfp_net_debugfs_dir_clean(struct dentry **dir); |
4c352362 JK |
846 | #else |
847 | static inline void nfp_net_debugfs_create(void) | |
848 | { | |
849 | } | |
850 | ||
851 | static inline void nfp_net_debugfs_destroy(void) | |
852 | { | |
853 | } | |
854 | ||
6f1cd5ca | 855 | static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) |
4c352362 | 856 | { |
6f1cd5ca | 857 | return NULL; |
4c352362 JK |
858 | } |
859 | ||
6f1cd5ca | 860 | static inline void |
d4e7f092 | 861 | nfp_net_debugfs_vnic_add(struct nfp_net *nn, struct dentry *ddir, int id) |
6f1cd5ca JK |
862 | { |
863 | } | |
864 | ||
865 | static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) | |
4c352362 JK |
866 | { |
867 | } | |
2633beb9 | 868 | #endif /* CONFIG_NFP_DEBUG */ |
4c352362 | 869 | |
66860beb | 870 | void nfp_net_filter_stats_timer(unsigned long data); |
2e9d594d | 871 | int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf); |
7533fdc0 | 872 | |
4c352362 | 873 | #endif /* _NFP_NET_H_ */ |