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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 | ||
53 | #define nn_err(nn, fmt, args...) netdev_err((nn)->netdev, fmt, ## args) | |
54 | #define nn_warn(nn, fmt, args...) netdev_warn((nn)->netdev, fmt, ## args) | |
55 | #define nn_info(nn, fmt, args...) netdev_info((nn)->netdev, fmt, ## args) | |
56 | #define nn_dbg(nn, fmt, args...) netdev_dbg((nn)->netdev, fmt, ## args) | |
57 | #define nn_warn_ratelimit(nn, fmt, args...) \ | |
58 | do { \ | |
59 | if (unlikely(net_ratelimit())) \ | |
60 | netdev_warn((nn)->netdev, fmt, ## args); \ | |
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 | |
fdace6c2 | 87 | #define NFP_NET_MIN_PORT_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 */ | |
105 | ||
106 | /* Offload definitions */ | |
107 | #define NFP_NET_N_VXLAN_PORTS (NFP_NET_CFG_VXLAN_SZ / sizeof(__be16)) | |
108 | ||
c0f031bc JK |
109 | #define NFP_NET_RX_BUF_HEADROOM (NET_SKB_PAD + NET_IP_ALIGN) |
110 | #define NFP_NET_RX_BUF_NON_DATA (NFP_NET_RX_BUF_HEADROOM + \ | |
111 | SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) | |
112 | ||
4c352362 | 113 | /* Forward declarations */ |
bd5ca062 | 114 | struct nfp_cpp; |
4c352362 JK |
115 | struct nfp_net; |
116 | struct nfp_net_r_vector; | |
117 | ||
118 | /* Convenience macro for writing dma address into RX/TX descriptors */ | |
119 | #define nfp_desc_set_dma_addr(desc, dma_addr) \ | |
120 | do { \ | |
121 | __typeof(desc) __d = (desc); \ | |
122 | dma_addr_t __addr = (dma_addr); \ | |
123 | \ | |
124 | __d->dma_addr_lo = cpu_to_le32(lower_32_bits(__addr)); \ | |
125 | __d->dma_addr_hi = upper_32_bits(__addr) & 0xff; \ | |
126 | } while (0) | |
127 | ||
128 | /* TX descriptor format */ | |
129 | ||
130 | #define PCIE_DESC_TX_EOP BIT(7) | |
131 | #define PCIE_DESC_TX_OFFSET_MASK GENMASK(6, 0) | |
132 | #define PCIE_DESC_TX_MSS_MASK GENMASK(13, 0) | |
133 | ||
134 | /* Flags in the host TX descriptor */ | |
135 | #define PCIE_DESC_TX_CSUM BIT(7) | |
136 | #define PCIE_DESC_TX_IP4_CSUM BIT(6) | |
137 | #define PCIE_DESC_TX_TCP_CSUM BIT(5) | |
138 | #define PCIE_DESC_TX_UDP_CSUM BIT(4) | |
139 | #define PCIE_DESC_TX_VLAN BIT(3) | |
140 | #define PCIE_DESC_TX_LSO BIT(2) | |
141 | #define PCIE_DESC_TX_ENCAP BIT(1) | |
142 | #define PCIE_DESC_TX_O_IP4_CSUM BIT(0) | |
143 | ||
144 | struct nfp_net_tx_desc { | |
145 | union { | |
146 | struct { | |
147 | u8 dma_addr_hi; /* High bits of host buf address */ | |
148 | __le16 dma_len; /* Length to DMA for this desc */ | |
149 | u8 offset_eop; /* Offset in buf where pkt starts + | |
150 | * highest bit is eop flag. | |
151 | */ | |
152 | __le32 dma_addr_lo; /* Low 32bit of host buf addr */ | |
153 | ||
154 | __le16 mss; /* MSS to be used for LSO */ | |
155 | u8 l4_offset; /* LSO, where the L4 data starts */ | |
156 | u8 flags; /* TX Flags, see @PCIE_DESC_TX_* */ | |
157 | ||
158 | __le16 vlan; /* VLAN tag to add if indicated */ | |
159 | __le16 data_len; /* Length of frame + meta data */ | |
160 | } __packed; | |
161 | __le32 vals[4]; | |
162 | }; | |
163 | }; | |
164 | ||
165 | /** | |
166 | * struct nfp_net_tx_buf - software TX buffer descriptor | |
167 | * @skb: sk_buff associated with this buffer | |
168 | * @dma_addr: DMA mapping address of the buffer | |
169 | * @fidx: Fragment index (-1 for the head and [0..nr_frags-1] for frags) | |
170 | * @pkt_cnt: Number of packets to be produced out of the skb associated | |
171 | * with this buffer (valid only on the head's buffer). | |
172 | * Will be 1 for all non-TSO packets. | |
173 | * @real_len: Number of bytes which to be produced out of the skb (valid only | |
174 | * on the head's buffer). Equal to skb->len for non-TSO packets. | |
175 | */ | |
176 | struct nfp_net_tx_buf { | |
ecd63a02 JK |
177 | union { |
178 | struct sk_buff *skb; | |
179 | void *frag; | |
180 | }; | |
4c352362 JK |
181 | dma_addr_t dma_addr; |
182 | short int fidx; | |
183 | u16 pkt_cnt; | |
184 | u32 real_len; | |
185 | }; | |
186 | ||
187 | /** | |
188 | * struct nfp_net_tx_ring - TX ring structure | |
189 | * @r_vec: Back pointer to ring vector structure | |
190 | * @idx: Ring index from Linux's perspective | |
191 | * @qcidx: Queue Controller Peripheral (QCP) queue index for the TX queue | |
192 | * @qcp_q: Pointer to base of the QCP TX queue | |
193 | * @cnt: Size of the queue in number of descriptors | |
194 | * @wr_p: TX ring write pointer (free running) | |
195 | * @rd_p: TX ring read pointer (free running) | |
196 | * @qcp_rd_p: Local copy of QCP TX queue read pointer | |
197 | * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer | |
198 | * (used for .xmit_more delayed kick) | |
199 | * @txbufs: Array of transmitted TX buffers, to free on transmit | |
200 | * @txds: Virtual address of TX ring in host memory | |
201 | * @dma: DMA address of the TX ring | |
202 | * @size: Size, in bytes, of the TX ring (needed to free) | |
203 | */ | |
204 | struct nfp_net_tx_ring { | |
205 | struct nfp_net_r_vector *r_vec; | |
206 | ||
207 | u32 idx; | |
208 | int qcidx; | |
209 | u8 __iomem *qcp_q; | |
210 | ||
211 | u32 cnt; | |
212 | u32 wr_p; | |
213 | u32 rd_p; | |
214 | u32 qcp_rd_p; | |
215 | ||
216 | u32 wr_ptr_add; | |
217 | ||
218 | struct nfp_net_tx_buf *txbufs; | |
219 | struct nfp_net_tx_desc *txds; | |
220 | ||
221 | dma_addr_t dma; | |
222 | unsigned int size; | |
223 | } ____cacheline_aligned; | |
224 | ||
225 | /* RX and freelist descriptor format */ | |
226 | ||
227 | #define PCIE_DESC_RX_DD BIT(7) | |
228 | #define PCIE_DESC_RX_META_LEN_MASK GENMASK(6, 0) | |
229 | ||
230 | /* Flags in the RX descriptor */ | |
231 | #define PCIE_DESC_RX_RSS cpu_to_le16(BIT(15)) | |
232 | #define PCIE_DESC_RX_I_IP4_CSUM cpu_to_le16(BIT(14)) | |
233 | #define PCIE_DESC_RX_I_IP4_CSUM_OK cpu_to_le16(BIT(13)) | |
234 | #define PCIE_DESC_RX_I_TCP_CSUM cpu_to_le16(BIT(12)) | |
235 | #define PCIE_DESC_RX_I_TCP_CSUM_OK cpu_to_le16(BIT(11)) | |
236 | #define PCIE_DESC_RX_I_UDP_CSUM cpu_to_le16(BIT(10)) | |
237 | #define PCIE_DESC_RX_I_UDP_CSUM_OK cpu_to_le16(BIT(9)) | |
7533fdc0 | 238 | #define PCIE_DESC_RX_BPF cpu_to_le16(BIT(8)) |
4c352362 JK |
239 | #define PCIE_DESC_RX_EOP cpu_to_le16(BIT(7)) |
240 | #define PCIE_DESC_RX_IP4_CSUM cpu_to_le16(BIT(6)) | |
241 | #define PCIE_DESC_RX_IP4_CSUM_OK cpu_to_le16(BIT(5)) | |
242 | #define PCIE_DESC_RX_TCP_CSUM cpu_to_le16(BIT(4)) | |
243 | #define PCIE_DESC_RX_TCP_CSUM_OK cpu_to_le16(BIT(3)) | |
244 | #define PCIE_DESC_RX_UDP_CSUM cpu_to_le16(BIT(2)) | |
245 | #define PCIE_DESC_RX_UDP_CSUM_OK cpu_to_le16(BIT(1)) | |
246 | #define PCIE_DESC_RX_VLAN cpu_to_le16(BIT(0)) | |
247 | ||
248 | #define PCIE_DESC_RX_CSUM_ALL (PCIE_DESC_RX_IP4_CSUM | \ | |
249 | PCIE_DESC_RX_TCP_CSUM | \ | |
250 | PCIE_DESC_RX_UDP_CSUM | \ | |
251 | PCIE_DESC_RX_I_IP4_CSUM | \ | |
252 | PCIE_DESC_RX_I_TCP_CSUM | \ | |
253 | PCIE_DESC_RX_I_UDP_CSUM) | |
254 | #define PCIE_DESC_RX_CSUM_OK_SHIFT 1 | |
255 | #define __PCIE_DESC_RX_CSUM_ALL le16_to_cpu(PCIE_DESC_RX_CSUM_ALL) | |
256 | #define __PCIE_DESC_RX_CSUM_ALL_OK (__PCIE_DESC_RX_CSUM_ALL >> \ | |
257 | PCIE_DESC_RX_CSUM_OK_SHIFT) | |
258 | ||
259 | struct nfp_net_rx_desc { | |
260 | union { | |
261 | struct { | |
262 | u8 dma_addr_hi; /* High bits of the buf address */ | |
263 | __le16 reserved; /* Must be zero */ | |
264 | u8 meta_len_dd; /* Must be zero */ | |
265 | ||
266 | __le32 dma_addr_lo; /* Low bits of the buffer address */ | |
267 | } __packed fld; | |
268 | ||
269 | struct { | |
270 | __le16 data_len; /* Length of the frame + meta data */ | |
271 | u8 reserved; | |
272 | u8 meta_len_dd; /* Length of meta data prepended + | |
273 | * descriptor done flag. | |
274 | */ | |
275 | ||
276 | __le16 flags; /* RX flags. See @PCIE_DESC_RX_* */ | |
277 | __le16 vlan; /* VLAN if stripped */ | |
278 | } __packed rxd; | |
279 | ||
280 | __le32 vals[2]; | |
281 | }; | |
282 | }; | |
283 | ||
19d0f54e JK |
284 | #define NFP_NET_META_FIELD_MASK GENMASK(NFP_NET_META_FIELD_SIZE - 1, 0) |
285 | ||
4c352362 JK |
286 | struct nfp_net_rx_hash { |
287 | __be32 hash_type; | |
288 | __be32 hash; | |
289 | }; | |
290 | ||
291 | /** | |
292 | * struct nfp_net_rx_buf - software RX buffer descriptor | |
c0f031bc | 293 | * @frag: page fragment buffer |
4c352362 JK |
294 | * @dma_addr: DMA mapping address of the buffer |
295 | */ | |
296 | struct nfp_net_rx_buf { | |
c0f031bc | 297 | void *frag; |
4c352362 JK |
298 | dma_addr_t dma_addr; |
299 | }; | |
300 | ||
301 | /** | |
302 | * struct nfp_net_rx_ring - RX ring structure | |
303 | * @r_vec: Back pointer to ring vector structure | |
304 | * @cnt: Size of the queue in number of descriptors | |
305 | * @wr_p: FL/RX ring write pointer (free running) | |
306 | * @rd_p: FL/RX ring read pointer (free running) | |
307 | * @idx: Ring index from Linux's perspective | |
308 | * @fl_qcidx: Queue Controller Peripheral (QCP) queue index for the freelist | |
309 | * @rx_qcidx: Queue Controller Peripheral (QCP) queue index for the RX queue | |
310 | * @qcp_fl: Pointer to base of the QCP freelist queue | |
311 | * @qcp_rx: Pointer to base of the QCP RX queue | |
312 | * @wr_ptr_add: Accumulated number of buffers to add to QCP write pointer | |
313 | * (used for free list batching) | |
314 | * @rxbufs: Array of transmitted FL/RX buffers | |
315 | * @rxds: Virtual address of FL/RX ring in host memory | |
316 | * @dma: DMA address of the FL/RX ring | |
317 | * @size: Size, in bytes, of the FL/RX ring (needed to free) | |
30d21171 JK |
318 | * @bufsz: Buffer allocation size for convenience of management routines |
319 | * (NOTE: this is in second cache line, do not use on fast path!) | |
4c352362 JK |
320 | */ |
321 | struct nfp_net_rx_ring { | |
322 | struct nfp_net_r_vector *r_vec; | |
323 | ||
324 | u32 cnt; | |
325 | u32 wr_p; | |
326 | u32 rd_p; | |
327 | ||
328 | u16 idx; | |
329 | u16 wr_ptr_add; | |
330 | ||
331 | int fl_qcidx; | |
332 | int rx_qcidx; | |
333 | u8 __iomem *qcp_fl; | |
334 | u8 __iomem *qcp_rx; | |
335 | ||
336 | struct nfp_net_rx_buf *rxbufs; | |
337 | struct nfp_net_rx_desc *rxds; | |
338 | ||
339 | dma_addr_t dma; | |
340 | unsigned int size; | |
30d21171 | 341 | unsigned int bufsz; |
4c352362 JK |
342 | } ____cacheline_aligned; |
343 | ||
344 | /** | |
345 | * struct nfp_net_r_vector - Per ring interrupt vector configuration | |
346 | * @nfp_net: Backpointer to nfp_net structure | |
347 | * @napi: NAPI structure for this ring vec | |
348 | * @tx_ring: Pointer to TX ring | |
349 | * @rx_ring: Pointer to RX ring | |
ecd63a02 | 350 | * @xdp_ring: Pointer to an extra TX ring for XDP |
fdace6c2 | 351 | * @irq_entry: MSI-X table entry (use for talking to the device) |
4c352362 JK |
352 | * @rx_sync: Seqlock for atomic updates of RX stats |
353 | * @rx_pkts: Number of received packets | |
354 | * @rx_bytes: Number of received bytes | |
355 | * @rx_drops: Number of packets dropped on RX due to lack of resources | |
356 | * @hw_csum_rx_ok: Counter of packets where the HW checksum was OK | |
357 | * @hw_csum_rx_inner_ok: Counter of packets where the inner HW checksum was OK | |
358 | * @hw_csum_rx_error: Counter of packets with bad checksums | |
359 | * @tx_sync: Seqlock for atomic updates of TX stats | |
360 | * @tx_pkts: Number of Transmitted packets | |
361 | * @tx_bytes: Number of Transmitted bytes | |
362 | * @hw_csum_tx: Counter of packets with TX checksum offload requested | |
363 | * @hw_csum_tx_inner: Counter of inner TX checksum offload requests | |
364 | * @tx_gather: Counter of packets with Gather DMA | |
365 | * @tx_lso: Counter of LSO packets sent | |
366 | * @tx_errors: How many TX errors were encountered | |
367 | * @tx_busy: How often was TX busy (no space)? | |
fdace6c2 | 368 | * @irq_vector: Interrupt vector number (use for talking to the OS) |
4c352362 JK |
369 | * @handler: Interrupt handler for this ring vector |
370 | * @name: Name of the interrupt vector | |
371 | * @affinity_mask: SMP affinity mask for this vector | |
372 | * | |
373 | * This structure ties RX and TX rings to interrupt vectors and a NAPI | |
374 | * context. This currently only supports one RX and TX ring per | |
375 | * interrupt vector but might be extended in the future to allow | |
376 | * association of multiple rings per vector. | |
377 | */ | |
378 | struct nfp_net_r_vector { | |
379 | struct nfp_net *nfp_net; | |
380 | struct napi_struct napi; | |
381 | ||
382 | struct nfp_net_tx_ring *tx_ring; | |
383 | struct nfp_net_rx_ring *rx_ring; | |
384 | ||
fdace6c2 | 385 | u16 irq_entry; |
4c352362 JK |
386 | |
387 | struct u64_stats_sync rx_sync; | |
388 | u64 rx_pkts; | |
389 | u64 rx_bytes; | |
390 | u64 rx_drops; | |
391 | u64 hw_csum_rx_ok; | |
392 | u64 hw_csum_rx_inner_ok; | |
393 | u64 hw_csum_rx_error; | |
394 | ||
ecd63a02 JK |
395 | struct nfp_net_tx_ring *xdp_ring; |
396 | ||
4c352362 JK |
397 | struct u64_stats_sync tx_sync; |
398 | u64 tx_pkts; | |
399 | u64 tx_bytes; | |
400 | u64 hw_csum_tx; | |
401 | u64 hw_csum_tx_inner; | |
402 | u64 tx_gather; | |
403 | u64 tx_lso; | |
404 | u64 tx_errors; | |
405 | u64 tx_busy; | |
406 | ||
fdace6c2 | 407 | u32 irq_vector; |
4c352362 JK |
408 | irq_handler_t handler; |
409 | char name[IFNAMSIZ + 8]; | |
410 | cpumask_t affinity_mask; | |
411 | } ____cacheline_aligned; | |
412 | ||
413 | /* Firmware version as it is written in the 32bit value in the BAR */ | |
414 | struct nfp_net_fw_version { | |
415 | u8 minor; | |
416 | u8 major; | |
417 | u8 class; | |
418 | u8 resv; | |
419 | } __packed; | |
420 | ||
421 | static inline bool nfp_net_fw_ver_eq(struct nfp_net_fw_version *fw_ver, | |
422 | u8 resv, u8 class, u8 major, u8 minor) | |
423 | { | |
424 | return fw_ver->resv == resv && | |
425 | fw_ver->class == class && | |
426 | fw_ver->major == major && | |
427 | fw_ver->minor == minor; | |
428 | } | |
429 | ||
66860beb JK |
430 | struct nfp_stat_pair { |
431 | u64 pkts; | |
432 | u64 bytes; | |
433 | }; | |
434 | ||
4c352362 JK |
435 | /** |
436 | * struct nfp_net - NFP network device structure | |
437 | * @pdev: Backpointer to PCI device | |
438 | * @netdev: Backpointer to net_device structure | |
4c352362 | 439 | * @is_vf: Is the driver attached to a VF? |
7533fdc0 | 440 | * @bpf_offload_skip_sw: Offloaded BPF program will not be rerun by cls_bpf |
6d677075 | 441 | * @bpf_offload_xdp: Offloaded BPF program is XDP |
4c352362 JK |
442 | * @ctrl: Local copy of the control register/word. |
443 | * @fl_bufsz: Currently configured size of the freelist buffers | |
444 | * @rx_offset: Offset in the RX buffers where packet data starts | |
ecd63a02 | 445 | * @xdp_prog: Installed XDP program |
4c352362 JK |
446 | * @fw_ver: Firmware version |
447 | * @cap: Capabilities advertised by the Firmware | |
448 | * @max_mtu: Maximum support MTU advertised by the Firmware | |
449 | * @rss_cfg: RSS configuration | |
450 | * @rss_key: RSS secret key | |
451 | * @rss_itbl: RSS indirection table | |
66860beb JK |
452 | * @rx_filter: Filter offload statistics - dropped packets/bytes |
453 | * @rx_filter_prev: Filter offload statistics - values from previous update | |
454 | * @rx_filter_change: Jiffies when statistics last changed | |
455 | * @rx_filter_stats_timer: Timer for polling filter offload statistics | |
456 | * @rx_filter_lock: Lock protecting timer state changes (teardown) | |
4c352362 JK |
457 | * @max_tx_rings: Maximum number of TX rings supported by the Firmware |
458 | * @max_rx_rings: Maximum number of RX rings supported by the Firmware | |
459 | * @num_tx_rings: Currently configured number of TX rings | |
ecd63a02 | 460 | * @num_stack_tx_rings: Number of TX rings used by the stack (not XDP) |
4c352362 JK |
461 | * @num_rx_rings: Currently configured number of RX rings |
462 | * @txd_cnt: Size of the TX ring in number of descriptors | |
463 | * @rxd_cnt: Size of the RX ring in number of descriptors | |
464 | * @tx_rings: Array of pre-allocated TX ring structures | |
465 | * @rx_rings: Array of pre-allocated RX ring structures | |
b33ae997 | 466 | * @max_r_vecs: Number of allocated interrupt vectors for RX/TX |
4c352362 JK |
467 | * @num_r_vecs: Number of used ring vectors |
468 | * @r_vecs: Pre-allocated array of ring vectors | |
469 | * @irq_entries: Pre-allocated array of MSI-X entries | |
470 | * @lsc_handler: Handler for Link State Change interrupt | |
471 | * @lsc_name: Name for Link State Change interrupt | |
472 | * @exn_handler: Handler for Exception interrupt | |
473 | * @exn_name: Name for Exception interrupt | |
474 | * @shared_handler: Handler for shared interrupts | |
475 | * @shared_name: Name for shared interrupt | |
476 | * @me_freq_mhz: ME clock_freq (MHz) | |
477 | * @reconfig_lock: Protects HW reconfiguration request regs/machinery | |
3d780b92 JK |
478 | * @reconfig_posted: Pending reconfig bits coming from async sources |
479 | * @reconfig_timer_active: Timer for reading reconfiguration results is pending | |
480 | * @reconfig_sync_present: Some thread is performing synchronous reconfig | |
481 | * @reconfig_timer: Timer for async reading of reconfig results | |
4c352362 JK |
482 | * @link_up: Is the link up? |
483 | * @link_status_lock: Protects @link_up and ensures atomicity with BAR reading | |
484 | * @rx_coalesce_usecs: RX interrupt moderation usecs delay parameter | |
485 | * @rx_coalesce_max_frames: RX interrupt moderation frame count parameter | |
486 | * @tx_coalesce_usecs: TX interrupt moderation usecs delay parameter | |
487 | * @tx_coalesce_max_frames: TX interrupt moderation frame count parameter | |
488 | * @vxlan_ports: VXLAN ports for RX inner csum offload communicated to HW | |
489 | * @vxlan_usecnt: IPv4/IPv6 VXLAN port use counts | |
490 | * @qcp_cfg: Pointer to QCP queue used for configuration notification | |
491 | * @ctrl_bar: Pointer to mapped control BAR | |
492 | * @tx_bar: Pointer to mapped TX queues | |
493 | * @rx_bar: Pointer to mapped FL/RX queues | |
494 | * @debugfs_dir: Device directory in debugfs | |
af623682 | 495 | * @ethtool_dump_flag: Ethtool dump flag |
63461a02 | 496 | * @port_list: Entry on device port list |
bd5ca062 | 497 | * @cpp: CPP device handle if available |
4c352362 JK |
498 | */ |
499 | struct nfp_net { | |
500 | struct pci_dev *pdev; | |
501 | struct net_device *netdev; | |
502 | ||
4c352362 | 503 | unsigned is_vf:1; |
7533fdc0 | 504 | unsigned bpf_offload_skip_sw:1; |
6d677075 | 505 | unsigned bpf_offload_xdp:1; |
4c352362 JK |
506 | |
507 | u32 ctrl; | |
508 | u32 fl_bufsz; | |
509 | ||
510 | u32 rx_offset; | |
511 | ||
ecd63a02 JK |
512 | struct bpf_prog *xdp_prog; |
513 | ||
73725d9d JK |
514 | struct nfp_net_tx_ring *tx_rings; |
515 | struct nfp_net_rx_ring *rx_rings; | |
516 | ||
4c352362 JK |
517 | struct nfp_net_fw_version fw_ver; |
518 | u32 cap; | |
519 | u32 max_mtu; | |
520 | ||
521 | u32 rss_cfg; | |
522 | u8 rss_key[NFP_NET_CFG_RSS_KEY_SZ]; | |
523 | u8 rss_itbl[NFP_NET_CFG_RSS_ITBL_SZ]; | |
524 | ||
66860beb JK |
525 | struct nfp_stat_pair rx_filter, rx_filter_prev; |
526 | unsigned long rx_filter_change; | |
527 | struct timer_list rx_filter_stats_timer; | |
528 | spinlock_t rx_filter_lock; | |
529 | ||
a4b562bb JK |
530 | unsigned int max_tx_rings; |
531 | unsigned int max_rx_rings; | |
4c352362 | 532 | |
a4b562bb | 533 | unsigned int num_tx_rings; |
ecd63a02 | 534 | unsigned int num_stack_tx_rings; |
a4b562bb | 535 | unsigned int num_rx_rings; |
4c352362 JK |
536 | |
537 | int stride_tx; | |
538 | int stride_rx; | |
539 | ||
540 | int txd_cnt; | |
541 | int rxd_cnt; | |
542 | ||
b33ae997 | 543 | unsigned int max_r_vecs; |
a4b562bb | 544 | unsigned int num_r_vecs; |
23a4e389 JK |
545 | struct nfp_net_r_vector r_vecs[NFP_NET_MAX_R_VECS]; |
546 | struct msix_entry irq_entries[NFP_NET_MAX_IRQS]; | |
4c352362 JK |
547 | |
548 | irq_handler_t lsc_handler; | |
549 | char lsc_name[IFNAMSIZ + 8]; | |
550 | ||
551 | irq_handler_t exn_handler; | |
552 | char exn_name[IFNAMSIZ + 8]; | |
553 | ||
554 | irq_handler_t shared_handler; | |
555 | char shared_name[IFNAMSIZ + 8]; | |
556 | ||
557 | u32 me_freq_mhz; | |
558 | ||
559 | bool link_up; | |
560 | spinlock_t link_status_lock; | |
561 | ||
562 | spinlock_t reconfig_lock; | |
3d780b92 JK |
563 | u32 reconfig_posted; |
564 | bool reconfig_timer_active; | |
565 | bool reconfig_sync_present; | |
566 | struct timer_list reconfig_timer; | |
4c352362 JK |
567 | |
568 | u32 rx_coalesce_usecs; | |
569 | u32 rx_coalesce_max_frames; | |
570 | u32 tx_coalesce_usecs; | |
571 | u32 tx_coalesce_max_frames; | |
572 | ||
573 | __be16 vxlan_ports[NFP_NET_N_VXLAN_PORTS]; | |
574 | u8 vxlan_usecnt[NFP_NET_N_VXLAN_PORTS]; | |
575 | ||
576 | u8 __iomem *qcp_cfg; | |
577 | ||
578 | u8 __iomem *ctrl_bar; | |
4c352362 JK |
579 | u8 __iomem *tx_bar; |
580 | u8 __iomem *rx_bar; | |
581 | ||
582 | struct dentry *debugfs_dir; | |
af623682 | 583 | u32 ethtool_dump_flag; |
63461a02 JK |
584 | |
585 | struct list_head port_list; | |
bd5ca062 JK |
586 | |
587 | struct nfp_cpp *cpp; | |
4c352362 JK |
588 | }; |
589 | ||
68453c7a | 590 | struct nfp_net_ring_set { |
164d1e9e | 591 | unsigned int n_rings; |
68453c7a JK |
592 | unsigned int mtu; |
593 | unsigned int dcnt; | |
594 | void *rings; | |
595 | }; | |
596 | ||
4c352362 JK |
597 | /* Functions to read/write from/to a BAR |
598 | * Performs any endian conversion necessary. | |
599 | */ | |
7533fdc0 JK |
600 | static inline u16 nn_readb(struct nfp_net *nn, int off) |
601 | { | |
602 | return readb(nn->ctrl_bar + off); | |
603 | } | |
604 | ||
4c352362 JK |
605 | static inline void nn_writeb(struct nfp_net *nn, int off, u8 val) |
606 | { | |
607 | writeb(val, nn->ctrl_bar + off); | |
608 | } | |
609 | ||
7533fdc0 JK |
610 | static inline u16 nn_readw(struct nfp_net *nn, int off) |
611 | { | |
7533fdc0 JK |
612 | return readw(nn->ctrl_bar + off); |
613 | } | |
614 | ||
615 | static inline void nn_writew(struct nfp_net *nn, int off, u16 val) | |
616 | { | |
7533fdc0 JK |
617 | writew(val, nn->ctrl_bar + off); |
618 | } | |
4c352362 JK |
619 | |
620 | static inline u32 nn_readl(struct nfp_net *nn, int off) | |
621 | { | |
622 | return readl(nn->ctrl_bar + off); | |
623 | } | |
624 | ||
625 | static inline void nn_writel(struct nfp_net *nn, int off, u32 val) | |
626 | { | |
627 | writel(val, nn->ctrl_bar + off); | |
628 | } | |
629 | ||
630 | static inline u64 nn_readq(struct nfp_net *nn, int off) | |
631 | { | |
632 | return readq(nn->ctrl_bar + off); | |
633 | } | |
634 | ||
635 | static inline void nn_writeq(struct nfp_net *nn, int off, u64 val) | |
636 | { | |
637 | writeq(val, nn->ctrl_bar + off); | |
638 | } | |
639 | ||
640 | /* Flush posted PCI writes by reading something without side effects */ | |
641 | static inline void nn_pci_flush(struct nfp_net *nn) | |
642 | { | |
643 | nn_readl(nn, NFP_NET_CFG_VERSION); | |
644 | } | |
645 | ||
646 | /* Queue Controller Peripheral access functions and definitions. | |
647 | * | |
648 | * Some of the BARs of the NFP are mapped to portions of the Queue | |
649 | * Controller Peripheral (QCP) address space on the NFP. A QCP queue | |
650 | * has a read and a write pointer (as well as a size and flags, | |
651 | * indicating overflow etc). The QCP offers a number of different | |
652 | * operation on queue pointers, but here we only offer function to | |
653 | * either add to a pointer or to read the pointer value. | |
654 | */ | |
655 | #define NFP_QCP_QUEUE_ADDR_SZ 0x800 | |
656 | #define NFP_QCP_QUEUE_OFF(_x) ((_x) * NFP_QCP_QUEUE_ADDR_SZ) | |
657 | #define NFP_QCP_QUEUE_ADD_RPTR 0x0000 | |
658 | #define NFP_QCP_QUEUE_ADD_WPTR 0x0004 | |
659 | #define NFP_QCP_QUEUE_STS_LO 0x0008 | |
660 | #define NFP_QCP_QUEUE_STS_LO_READPTR_mask 0x3ffff | |
661 | #define NFP_QCP_QUEUE_STS_HI 0x000c | |
662 | #define NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask 0x3ffff | |
663 | ||
416db5c1 | 664 | /* The offset of a QCP queues in the PCIe Target */ |
4c352362 JK |
665 | #define NFP_PCIE_QUEUE(_q) (0x80000 + (NFP_QCP_QUEUE_ADDR_SZ * ((_q) & 0xff))) |
666 | ||
667 | /* nfp_qcp_ptr - Read or Write Pointer of a queue */ | |
668 | enum nfp_qcp_ptr { | |
669 | NFP_QCP_READ_PTR = 0, | |
670 | NFP_QCP_WRITE_PTR | |
671 | }; | |
672 | ||
673 | /* There appear to be an *undocumented* upper limit on the value which | |
674 | * one can add to a queue and that value is either 0x3f or 0x7f. We | |
675 | * go with 0x3f as a conservative measure. | |
676 | */ | |
677 | #define NFP_QCP_MAX_ADD 0x3f | |
678 | ||
679 | static inline void _nfp_qcp_ptr_add(u8 __iomem *q, | |
680 | enum nfp_qcp_ptr ptr, u32 val) | |
681 | { | |
682 | u32 off; | |
683 | ||
684 | if (ptr == NFP_QCP_READ_PTR) | |
685 | off = NFP_QCP_QUEUE_ADD_RPTR; | |
686 | else | |
687 | off = NFP_QCP_QUEUE_ADD_WPTR; | |
688 | ||
689 | while (val > NFP_QCP_MAX_ADD) { | |
690 | writel(NFP_QCP_MAX_ADD, q + off); | |
691 | val -= NFP_QCP_MAX_ADD; | |
692 | } | |
693 | ||
694 | writel(val, q + off); | |
695 | } | |
696 | ||
697 | /** | |
698 | * nfp_qcp_rd_ptr_add() - Add the value to the read pointer of a queue | |
699 | * | |
700 | * @q: Base address for queue structure | |
701 | * @val: Value to add to the queue pointer | |
702 | * | |
703 | * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. | |
704 | */ | |
705 | static inline void nfp_qcp_rd_ptr_add(u8 __iomem *q, u32 val) | |
706 | { | |
707 | _nfp_qcp_ptr_add(q, NFP_QCP_READ_PTR, val); | |
708 | } | |
709 | ||
710 | /** | |
711 | * nfp_qcp_wr_ptr_add() - Add the value to the write pointer of a queue | |
712 | * | |
713 | * @q: Base address for queue structure | |
714 | * @val: Value to add to the queue pointer | |
715 | * | |
716 | * If @val is greater than @NFP_QCP_MAX_ADD multiple writes are performed. | |
717 | */ | |
718 | static inline void nfp_qcp_wr_ptr_add(u8 __iomem *q, u32 val) | |
719 | { | |
720 | _nfp_qcp_ptr_add(q, NFP_QCP_WRITE_PTR, val); | |
721 | } | |
722 | ||
723 | static inline u32 _nfp_qcp_read(u8 __iomem *q, enum nfp_qcp_ptr ptr) | |
724 | { | |
725 | u32 off; | |
726 | u32 val; | |
727 | ||
728 | if (ptr == NFP_QCP_READ_PTR) | |
729 | off = NFP_QCP_QUEUE_STS_LO; | |
730 | else | |
731 | off = NFP_QCP_QUEUE_STS_HI; | |
732 | ||
733 | val = readl(q + off); | |
734 | ||
735 | if (ptr == NFP_QCP_READ_PTR) | |
736 | return val & NFP_QCP_QUEUE_STS_LO_READPTR_mask; | |
737 | else | |
738 | return val & NFP_QCP_QUEUE_STS_HI_WRITEPTR_mask; | |
739 | } | |
740 | ||
741 | /** | |
742 | * nfp_qcp_rd_ptr_read() - Read the current read pointer value for a queue | |
743 | * @q: Base address for queue structure | |
744 | * | |
745 | * Return: Value read. | |
746 | */ | |
747 | static inline u32 nfp_qcp_rd_ptr_read(u8 __iomem *q) | |
748 | { | |
749 | return _nfp_qcp_read(q, NFP_QCP_READ_PTR); | |
750 | } | |
751 | ||
752 | /** | |
753 | * nfp_qcp_wr_ptr_read() - Read the current write pointer value for a queue | |
754 | * @q: Base address for queue structure | |
755 | * | |
756 | * Return: Value read. | |
757 | */ | |
758 | static inline u32 nfp_qcp_wr_ptr_read(u8 __iomem *q) | |
759 | { | |
760 | return _nfp_qcp_read(q, NFP_QCP_WRITE_PTR); | |
761 | } | |
762 | ||
763 | /* Globals */ | |
2633beb9 | 764 | extern const char nfp_driver_version[]; |
4c352362 JK |
765 | |
766 | /* Prototypes */ | |
767 | void nfp_net_get_fw_version(struct nfp_net_fw_version *fw_ver, | |
768 | void __iomem *ctrl_bar); | |
769 | ||
a4b562bb JK |
770 | struct nfp_net * |
771 | nfp_net_netdev_alloc(struct pci_dev *pdev, | |
772 | unsigned int max_tx_rings, unsigned int max_rx_rings); | |
4c352362 JK |
773 | void nfp_net_netdev_free(struct nfp_net *nn); |
774 | int nfp_net_netdev_init(struct net_device *netdev); | |
775 | void nfp_net_netdev_clean(struct net_device *netdev); | |
776 | void nfp_net_set_ethtool_ops(struct net_device *netdev); | |
777 | void nfp_net_info(struct nfp_net *nn); | |
778 | int nfp_net_reconfig(struct nfp_net *nn, u32 update); | |
779 | void nfp_net_rss_write_itbl(struct nfp_net *nn); | |
780 | void nfp_net_rss_write_key(struct nfp_net *nn); | |
781 | void nfp_net_coalesce_write_cfg(struct nfp_net *nn); | |
fdace6c2 JK |
782 | |
783 | unsigned int | |
784 | nfp_net_irqs_alloc(struct pci_dev *pdev, struct msix_entry *irq_entries, | |
785 | unsigned int min_irqs, unsigned int want_irqs); | |
786 | void nfp_net_irqs_disable(struct pci_dev *pdev); | |
787 | void | |
788 | nfp_net_irqs_assign(struct nfp_net *nn, struct msix_entry *irq_entries, | |
789 | unsigned int n); | |
68453c7a | 790 | int |
ecd63a02 JK |
791 | nfp_net_ring_reconfig(struct nfp_net *nn, struct bpf_prog **xdp_prog, |
792 | struct nfp_net_ring_set *rx, struct nfp_net_ring_set *tx); | |
4c352362 | 793 | |
2633beb9 | 794 | #ifdef CONFIG_NFP_DEBUG |
4c352362 JK |
795 | void nfp_net_debugfs_create(void); |
796 | void nfp_net_debugfs_destroy(void); | |
6f1cd5ca JK |
797 | struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev); |
798 | void nfp_net_debugfs_port_add(struct nfp_net *nn, struct dentry *ddir, int id); | |
799 | void nfp_net_debugfs_dir_clean(struct dentry **dir); | |
4c352362 JK |
800 | #else |
801 | static inline void nfp_net_debugfs_create(void) | |
802 | { | |
803 | } | |
804 | ||
805 | static inline void nfp_net_debugfs_destroy(void) | |
806 | { | |
807 | } | |
808 | ||
6f1cd5ca | 809 | static inline struct dentry *nfp_net_debugfs_device_add(struct pci_dev *pdev) |
4c352362 | 810 | { |
6f1cd5ca | 811 | return NULL; |
4c352362 JK |
812 | } |
813 | ||
6f1cd5ca JK |
814 | static inline void |
815 | nfp_net_debugfs_port_add(struct nfp_net *nn, struct dentry *ddir, int id) | |
816 | { | |
817 | } | |
818 | ||
819 | static inline void nfp_net_debugfs_dir_clean(struct dentry **dir) | |
4c352362 JK |
820 | { |
821 | } | |
2633beb9 | 822 | #endif /* CONFIG_NFP_DEBUG */ |
4c352362 | 823 | |
66860beb | 824 | void nfp_net_filter_stats_timer(unsigned long data); |
2e9d594d | 825 | int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf); |
7533fdc0 | 826 | |
4c352362 | 827 | #endif /* _NFP_NET_H_ */ |