Commit | Line | Data |
---|---|---|
fe56b9e6 YM |
1 | /* QLogic qed NIC Driver |
2 | * Copyright (c) 2015 QLogic Corporation | |
3 | * | |
4 | * This software is available under the terms of the GNU General Public License | |
5 | * (GPL) Version 2, available from the file COPYING in the main directory of | |
6 | * this source tree. | |
7 | */ | |
8 | ||
9 | #include <linux/types.h> | |
10 | #include <asm/byteorder.h> | |
11 | #include <linux/io.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/dma-mapping.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/list.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/slab.h> | |
19 | #include <linux/spinlock.h> | |
20 | #include <linux/string.h> | |
21 | #include "qed.h" | |
22 | #include "qed_cxt.h" | |
23 | #include "qed_dev_api.h" | |
24 | #include "qed_hsi.h" | |
25 | #include "qed_hw.h" | |
26 | #include "qed_int.h" | |
27 | #include "qed_mcp.h" | |
28 | #include "qed_reg_addr.h" | |
29 | #include "qed_sp.h" | |
37bff2b9 | 30 | #include "qed_sriov.h" |
fe56b9e6 YM |
31 | |
32 | /*************************************************************************** | |
33 | * Structures & Definitions | |
34 | ***************************************************************************/ | |
35 | ||
36 | #define SPQ_HIGH_PRI_RESERVE_DEFAULT (1) | |
37 | #define SPQ_BLOCK_SLEEP_LENGTH (1000) | |
38 | ||
39 | /*************************************************************************** | |
40 | * Blocking Imp. (BLOCK/EBLOCK mode) | |
41 | ***************************************************************************/ | |
42 | static void qed_spq_blocking_cb(struct qed_hwfn *p_hwfn, | |
43 | void *cookie, | |
1a635e48 | 44 | union event_ring_data *data, u8 fw_return_code) |
fe56b9e6 YM |
45 | { |
46 | struct qed_spq_comp_done *comp_done; | |
47 | ||
48 | comp_done = (struct qed_spq_comp_done *)cookie; | |
49 | ||
50 | comp_done->done = 0x1; | |
51 | comp_done->fw_return_code = fw_return_code; | |
52 | ||
53 | /* make update visible to waiting thread */ | |
54 | smp_wmb(); | |
55 | } | |
56 | ||
57 | static int qed_spq_block(struct qed_hwfn *p_hwfn, | |
58 | struct qed_spq_entry *p_ent, | |
59 | u8 *p_fw_ret) | |
60 | { | |
61 | int sleep_count = SPQ_BLOCK_SLEEP_LENGTH; | |
62 | struct qed_spq_comp_done *comp_done; | |
63 | int rc; | |
64 | ||
65 | comp_done = (struct qed_spq_comp_done *)p_ent->comp_cb.cookie; | |
66 | while (sleep_count) { | |
67 | /* validate we receive completion update */ | |
68 | smp_rmb(); | |
69 | if (comp_done->done == 1) { | |
70 | if (p_fw_ret) | |
71 | *p_fw_ret = comp_done->fw_return_code; | |
72 | return 0; | |
73 | } | |
74 | usleep_range(5000, 10000); | |
75 | sleep_count--; | |
76 | } | |
77 | ||
78 | DP_INFO(p_hwfn, "Ramrod is stuck, requesting MCP drain\n"); | |
79 | rc = qed_mcp_drain(p_hwfn, p_hwfn->p_main_ptt); | |
80 | if (rc != 0) | |
81 | DP_NOTICE(p_hwfn, "MCP drain failed\n"); | |
82 | ||
83 | /* Retry after drain */ | |
84 | sleep_count = SPQ_BLOCK_SLEEP_LENGTH; | |
85 | while (sleep_count) { | |
86 | /* validate we receive completion update */ | |
87 | smp_rmb(); | |
88 | if (comp_done->done == 1) { | |
89 | if (p_fw_ret) | |
90 | *p_fw_ret = comp_done->fw_return_code; | |
91 | return 0; | |
92 | } | |
93 | usleep_range(5000, 10000); | |
94 | sleep_count--; | |
95 | } | |
96 | ||
97 | if (comp_done->done == 1) { | |
98 | if (p_fw_ret) | |
99 | *p_fw_ret = comp_done->fw_return_code; | |
100 | return 0; | |
101 | } | |
102 | ||
103 | DP_NOTICE(p_hwfn, "Ramrod is stuck, MCP drain failed\n"); | |
104 | ||
105 | return -EBUSY; | |
106 | } | |
107 | ||
108 | /*************************************************************************** | |
109 | * SPQ entries inner API | |
110 | ***************************************************************************/ | |
1a635e48 YM |
111 | static int qed_spq_fill_entry(struct qed_hwfn *p_hwfn, |
112 | struct qed_spq_entry *p_ent) | |
fe56b9e6 | 113 | { |
fe56b9e6 YM |
114 | p_ent->flags = 0; |
115 | ||
116 | switch (p_ent->comp_mode) { | |
117 | case QED_SPQ_MODE_EBLOCK: | |
118 | case QED_SPQ_MODE_BLOCK: | |
119 | p_ent->comp_cb.function = qed_spq_blocking_cb; | |
120 | break; | |
121 | case QED_SPQ_MODE_CB: | |
122 | break; | |
123 | default: | |
124 | DP_NOTICE(p_hwfn, "Unknown SPQE completion mode %d\n", | |
125 | p_ent->comp_mode); | |
126 | return -EINVAL; | |
127 | } | |
128 | ||
129 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, | |
130 | "Ramrod header: [CID 0x%08x CMD 0x%02x protocol 0x%02x] Data pointer: [%08x:%08x] Completion Mode: %s\n", | |
131 | p_ent->elem.hdr.cid, | |
132 | p_ent->elem.hdr.cmd_id, | |
133 | p_ent->elem.hdr.protocol_id, | |
134 | p_ent->elem.data_ptr.hi, | |
135 | p_ent->elem.data_ptr.lo, | |
136 | D_TRINE(p_ent->comp_mode, QED_SPQ_MODE_EBLOCK, | |
137 | QED_SPQ_MODE_BLOCK, "MODE_EBLOCK", "MODE_BLOCK", | |
138 | "MODE_CB")); | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | /*************************************************************************** | |
144 | * HSI access | |
145 | ***************************************************************************/ | |
146 | static void qed_spq_hw_initialize(struct qed_hwfn *p_hwfn, | |
147 | struct qed_spq *p_spq) | |
148 | { | |
149 | u16 pq; | |
150 | struct qed_cxt_info cxt_info; | |
151 | struct core_conn_context *p_cxt; | |
152 | union qed_qm_pq_params pq_params; | |
153 | int rc; | |
154 | ||
155 | cxt_info.iid = p_spq->cid; | |
156 | ||
157 | rc = qed_cxt_get_cid_info(p_hwfn, &cxt_info); | |
158 | ||
159 | if (rc < 0) { | |
160 | DP_NOTICE(p_hwfn, "Cannot find context info for cid=%d\n", | |
161 | p_spq->cid); | |
162 | return; | |
163 | } | |
164 | ||
165 | p_cxt = cxt_info.p_cxt; | |
166 | ||
167 | SET_FIELD(p_cxt->xstorm_ag_context.flags10, | |
168 | XSTORM_CORE_CONN_AG_CTX_DQ_CF_EN, 1); | |
169 | SET_FIELD(p_cxt->xstorm_ag_context.flags1, | |
170 | XSTORM_CORE_CONN_AG_CTX_DQ_CF_ACTIVE, 1); | |
171 | SET_FIELD(p_cxt->xstorm_ag_context.flags9, | |
172 | XSTORM_CORE_CONN_AG_CTX_CONSOLID_PROD_CF_EN, 1); | |
173 | ||
174 | /* QM physical queue */ | |
175 | memset(&pq_params, 0, sizeof(pq_params)); | |
176 | pq_params.core.tc = LB_TC; | |
177 | pq = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); | |
178 | p_cxt->xstorm_ag_context.physical_q0 = cpu_to_le16(pq); | |
179 | ||
180 | p_cxt->xstorm_st_context.spq_base_lo = | |
181 | DMA_LO_LE(p_spq->chain.p_phys_addr); | |
182 | p_cxt->xstorm_st_context.spq_base_hi = | |
183 | DMA_HI_LE(p_spq->chain.p_phys_addr); | |
184 | ||
94494598 YM |
185 | DMA_REGPAIR_LE(p_cxt->xstorm_st_context.consolid_base_addr, |
186 | p_hwfn->p_consq->chain.p_phys_addr); | |
fe56b9e6 YM |
187 | } |
188 | ||
189 | static int qed_spq_hw_post(struct qed_hwfn *p_hwfn, | |
1a635e48 | 190 | struct qed_spq *p_spq, struct qed_spq_entry *p_ent) |
fe56b9e6 | 191 | { |
76a9a364 TT |
192 | struct qed_chain *p_chain = &p_hwfn->p_spq->chain; |
193 | u16 echo = qed_chain_get_prod_idx(p_chain); | |
fe56b9e6 YM |
194 | struct slow_path_element *elem; |
195 | struct core_db_data db; | |
196 | ||
76a9a364 | 197 | p_ent->elem.hdr.echo = cpu_to_le16(echo); |
fe56b9e6 YM |
198 | elem = qed_chain_produce(p_chain); |
199 | if (!elem) { | |
200 | DP_NOTICE(p_hwfn, "Failed to produce from SPQ chain\n"); | |
201 | return -EINVAL; | |
202 | } | |
203 | ||
204 | *elem = p_ent->elem; /* struct assignment */ | |
205 | ||
206 | /* send a doorbell on the slow hwfn session */ | |
207 | memset(&db, 0, sizeof(db)); | |
208 | SET_FIELD(db.params, CORE_DB_DATA_DEST, DB_DEST_XCM); | |
209 | SET_FIELD(db.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); | |
210 | SET_FIELD(db.params, CORE_DB_DATA_AGG_VAL_SEL, | |
211 | DQ_XCM_CORE_SPQ_PROD_CMD); | |
212 | db.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; | |
fe56b9e6 YM |
213 | db.spq_prod = cpu_to_le16(qed_chain_get_prod_idx(p_chain)); |
214 | ||
34c7bb47 SRK |
215 | /* make sure the SPQE is updated before the doorbell */ |
216 | wmb(); | |
fe56b9e6 YM |
217 | |
218 | DOORBELL(p_hwfn, qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), *(u32 *)&db); | |
219 | ||
220 | /* make sure doorbell is rang */ | |
34c7bb47 | 221 | wmb(); |
fe56b9e6 YM |
222 | |
223 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, | |
224 | "Doorbelled [0x%08x, CID 0x%08x] with Flags: %02x agg_params: %02x, prod: %04x\n", | |
225 | qed_db_addr(p_spq->cid, DQ_DEMS_LEGACY), | |
226 | p_spq->cid, db.params, db.agg_flags, | |
227 | qed_chain_get_prod_idx(p_chain)); | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | /*************************************************************************** | |
233 | * Asynchronous events | |
234 | ***************************************************************************/ | |
235 | static int | |
236 | qed_async_event_completion(struct qed_hwfn *p_hwfn, | |
237 | struct event_ring_entry *p_eqe) | |
238 | { | |
37bff2b9 YM |
239 | switch (p_eqe->protocol_id) { |
240 | case PROTOCOLID_COMMON: | |
241 | return qed_sriov_eqe_event(p_hwfn, | |
242 | p_eqe->opcode, | |
243 | p_eqe->echo, &p_eqe->data); | |
244 | default: | |
245 | DP_NOTICE(p_hwfn, | |
246 | "Unknown Async completion for protocol: %d\n", | |
247 | p_eqe->protocol_id); | |
248 | return -EINVAL; | |
249 | } | |
fe56b9e6 YM |
250 | } |
251 | ||
252 | /*************************************************************************** | |
253 | * EQ API | |
254 | ***************************************************************************/ | |
1a635e48 | 255 | void qed_eq_prod_update(struct qed_hwfn *p_hwfn, u16 prod) |
fe56b9e6 YM |
256 | { |
257 | u32 addr = GTT_BAR0_MAP_REG_USDM_RAM + | |
258 | USTORM_EQE_CONS_OFFSET(p_hwfn->rel_pf_id); | |
259 | ||
260 | REG_WR16(p_hwfn, addr, prod); | |
261 | ||
262 | /* keep prod updates ordered */ | |
263 | mmiowb(); | |
264 | } | |
265 | ||
1a635e48 | 266 | int qed_eq_completion(struct qed_hwfn *p_hwfn, void *cookie) |
fe56b9e6 YM |
267 | { |
268 | struct qed_eq *p_eq = cookie; | |
269 | struct qed_chain *p_chain = &p_eq->chain; | |
270 | int rc = 0; | |
271 | ||
272 | /* take a snapshot of the FW consumer */ | |
273 | u16 fw_cons_idx = le16_to_cpu(*p_eq->p_fw_cons); | |
274 | ||
275 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, "fw_cons_idx %x\n", fw_cons_idx); | |
276 | ||
277 | /* Need to guarantee the fw_cons index we use points to a usuable | |
278 | * element (to comply with our chain), so our macros would comply | |
279 | */ | |
280 | if ((fw_cons_idx & qed_chain_get_usable_per_page(p_chain)) == | |
281 | qed_chain_get_usable_per_page(p_chain)) | |
282 | fw_cons_idx += qed_chain_get_unusable_per_page(p_chain); | |
283 | ||
284 | /* Complete current segment of eq entries */ | |
285 | while (fw_cons_idx != qed_chain_get_cons_idx(p_chain)) { | |
286 | struct event_ring_entry *p_eqe = qed_chain_consume(p_chain); | |
287 | ||
288 | if (!p_eqe) { | |
289 | rc = -EINVAL; | |
290 | break; | |
291 | } | |
292 | ||
293 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, | |
294 | "op %x prot %x res0 %x echo %x fwret %x flags %x\n", | |
295 | p_eqe->opcode, | |
296 | p_eqe->protocol_id, | |
297 | p_eqe->reserved0, | |
298 | le16_to_cpu(p_eqe->echo), | |
299 | p_eqe->fw_return_code, | |
300 | p_eqe->flags); | |
301 | ||
302 | if (GET_FIELD(p_eqe->flags, EVENT_RING_ENTRY_ASYNC)) { | |
303 | if (qed_async_event_completion(p_hwfn, p_eqe)) | |
304 | rc = -EINVAL; | |
305 | } else if (qed_spq_completion(p_hwfn, | |
306 | p_eqe->echo, | |
307 | p_eqe->fw_return_code, | |
308 | &p_eqe->data)) { | |
309 | rc = -EINVAL; | |
310 | } | |
311 | ||
312 | qed_chain_recycle_consumed(p_chain); | |
313 | } | |
314 | ||
315 | qed_eq_prod_update(p_hwfn, qed_chain_get_prod_idx(p_chain)); | |
316 | ||
317 | return rc; | |
318 | } | |
319 | ||
1a635e48 | 320 | struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn, u16 num_elem) |
fe56b9e6 YM |
321 | { |
322 | struct qed_eq *p_eq; | |
323 | ||
324 | /* Allocate EQ struct */ | |
60fffb3b | 325 | p_eq = kzalloc(sizeof(*p_eq), GFP_KERNEL); |
2591c280 | 326 | if (!p_eq) |
fe56b9e6 | 327 | return NULL; |
fe56b9e6 YM |
328 | |
329 | /* Allocate and initialize EQ chain*/ | |
330 | if (qed_chain_alloc(p_hwfn->cdev, | |
331 | QED_CHAIN_USE_TO_PRODUCE, | |
332 | QED_CHAIN_MODE_PBL, | |
a91eb52a | 333 | QED_CHAIN_CNT_TYPE_U16, |
fe56b9e6 YM |
334 | num_elem, |
335 | sizeof(union event_ring_element), | |
2591c280 | 336 | &p_eq->chain)) |
fe56b9e6 | 337 | goto eq_allocate_fail; |
fe56b9e6 YM |
338 | |
339 | /* register EQ completion on the SP SB */ | |
1a635e48 YM |
340 | qed_int_register_cb(p_hwfn, qed_eq_completion, |
341 | p_eq, &p_eq->eq_sb_index, &p_eq->p_fw_cons); | |
fe56b9e6 YM |
342 | |
343 | return p_eq; | |
344 | ||
345 | eq_allocate_fail: | |
346 | qed_eq_free(p_hwfn, p_eq); | |
347 | return NULL; | |
348 | } | |
349 | ||
1a635e48 | 350 | void qed_eq_setup(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) |
fe56b9e6 YM |
351 | { |
352 | qed_chain_reset(&p_eq->chain); | |
353 | } | |
354 | ||
1a635e48 | 355 | void qed_eq_free(struct qed_hwfn *p_hwfn, struct qed_eq *p_eq) |
fe56b9e6 YM |
356 | { |
357 | if (!p_eq) | |
358 | return; | |
359 | qed_chain_free(p_hwfn->cdev, &p_eq->chain); | |
360 | kfree(p_eq); | |
361 | } | |
362 | ||
cee4d264 MC |
363 | /*************************************************************************** |
364 | * CQE API - manipulate EQ functionality | |
365 | ***************************************************************************/ | |
1a635e48 YM |
366 | static int qed_cqe_completion(struct qed_hwfn *p_hwfn, |
367 | struct eth_slow_path_rx_cqe *cqe, | |
368 | enum protocol_type protocol) | |
cee4d264 | 369 | { |
1408cc1f YM |
370 | if (IS_VF(p_hwfn->cdev)) |
371 | return 0; | |
372 | ||
cee4d264 MC |
373 | /* @@@tmp - it's possible we'll eventually want to handle some |
374 | * actual commands that can arrive here, but for now this is only | |
375 | * used to complete the ramrod using the echo value on the cqe | |
376 | */ | |
377 | return qed_spq_completion(p_hwfn, cqe->echo, 0, NULL); | |
378 | } | |
379 | ||
380 | int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn, | |
381 | struct eth_slow_path_rx_cqe *cqe) | |
382 | { | |
383 | int rc; | |
384 | ||
385 | rc = qed_cqe_completion(p_hwfn, cqe, PROTOCOLID_ETH); | |
386 | if (rc) | |
387 | DP_NOTICE(p_hwfn, | |
388 | "Failed to handle RXQ CQE [cmd 0x%02x]\n", | |
389 | cqe->ramrod_cmd_id); | |
390 | ||
391 | return rc; | |
392 | } | |
393 | ||
fe56b9e6 YM |
394 | /*************************************************************************** |
395 | * Slow hwfn Queue (spq) | |
396 | ***************************************************************************/ | |
397 | void qed_spq_setup(struct qed_hwfn *p_hwfn) | |
398 | { | |
a91eb52a YM |
399 | struct qed_spq *p_spq = p_hwfn->p_spq; |
400 | struct qed_spq_entry *p_virt = NULL; | |
401 | dma_addr_t p_phys = 0; | |
402 | u32 i, capacity; | |
fe56b9e6 YM |
403 | |
404 | INIT_LIST_HEAD(&p_spq->pending); | |
405 | INIT_LIST_HEAD(&p_spq->completion_pending); | |
406 | INIT_LIST_HEAD(&p_spq->free_pool); | |
407 | INIT_LIST_HEAD(&p_spq->unlimited_pending); | |
408 | spin_lock_init(&p_spq->lock); | |
409 | ||
410 | /* SPQ empty pool */ | |
411 | p_phys = p_spq->p_phys + offsetof(struct qed_spq_entry, ramrod); | |
412 | p_virt = p_spq->p_virt; | |
413 | ||
a91eb52a YM |
414 | capacity = qed_chain_get_capacity(&p_spq->chain); |
415 | for (i = 0; i < capacity; i++) { | |
94494598 | 416 | DMA_REGPAIR_LE(p_virt->elem.data_ptr, p_phys); |
fe56b9e6 YM |
417 | |
418 | list_add_tail(&p_virt->list, &p_spq->free_pool); | |
419 | ||
420 | p_virt++; | |
421 | p_phys += sizeof(struct qed_spq_entry); | |
422 | } | |
423 | ||
424 | /* Statistics */ | |
425 | p_spq->normal_count = 0; | |
426 | p_spq->comp_count = 0; | |
427 | p_spq->comp_sent_count = 0; | |
428 | p_spq->unlimited_pending_count = 0; | |
76a9a364 TT |
429 | |
430 | bitmap_zero(p_spq->p_comp_bitmap, SPQ_RING_SIZE); | |
431 | p_spq->comp_bitmap_idx = 0; | |
fe56b9e6 YM |
432 | |
433 | /* SPQ cid, cannot fail */ | |
434 | qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_spq->cid); | |
435 | qed_spq_hw_initialize(p_hwfn, p_spq); | |
436 | ||
437 | /* reset the chain itself */ | |
438 | qed_chain_reset(&p_spq->chain); | |
439 | } | |
440 | ||
441 | int qed_spq_alloc(struct qed_hwfn *p_hwfn) | |
442 | { | |
a91eb52a YM |
443 | struct qed_spq_entry *p_virt = NULL; |
444 | struct qed_spq *p_spq = NULL; | |
445 | dma_addr_t p_phys = 0; | |
446 | u32 capacity; | |
fe56b9e6 YM |
447 | |
448 | /* SPQ struct */ | |
1a635e48 | 449 | p_spq = kzalloc(sizeof(struct qed_spq), GFP_KERNEL); |
2591c280 | 450 | if (!p_spq) |
fe56b9e6 | 451 | return -ENOMEM; |
fe56b9e6 YM |
452 | |
453 | /* SPQ ring */ | |
454 | if (qed_chain_alloc(p_hwfn->cdev, | |
455 | QED_CHAIN_USE_TO_PRODUCE, | |
456 | QED_CHAIN_MODE_SINGLE, | |
a91eb52a | 457 | QED_CHAIN_CNT_TYPE_U16, |
fe56b9e6 YM |
458 | 0, /* N/A when the mode is SINGLE */ |
459 | sizeof(struct slow_path_element), | |
2591c280 | 460 | &p_spq->chain)) |
fe56b9e6 | 461 | goto spq_allocate_fail; |
fe56b9e6 YM |
462 | |
463 | /* allocate and fill the SPQ elements (incl. ramrod data list) */ | |
a91eb52a | 464 | capacity = qed_chain_get_capacity(&p_spq->chain); |
fe56b9e6 | 465 | p_virt = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev, |
2591c280 | 466 | capacity * sizeof(struct qed_spq_entry), |
a91eb52a | 467 | &p_phys, GFP_KERNEL); |
fe56b9e6 YM |
468 | if (!p_virt) |
469 | goto spq_allocate_fail; | |
470 | ||
471 | p_spq->p_virt = p_virt; | |
472 | p_spq->p_phys = p_phys; | |
473 | p_hwfn->p_spq = p_spq; | |
474 | ||
475 | return 0; | |
476 | ||
477 | spq_allocate_fail: | |
478 | qed_chain_free(p_hwfn->cdev, &p_spq->chain); | |
479 | kfree(p_spq); | |
480 | return -ENOMEM; | |
481 | } | |
482 | ||
483 | void qed_spq_free(struct qed_hwfn *p_hwfn) | |
484 | { | |
485 | struct qed_spq *p_spq = p_hwfn->p_spq; | |
a91eb52a | 486 | u32 capacity; |
fe56b9e6 YM |
487 | |
488 | if (!p_spq) | |
489 | return; | |
490 | ||
a91eb52a YM |
491 | if (p_spq->p_virt) { |
492 | capacity = qed_chain_get_capacity(&p_spq->chain); | |
fe56b9e6 | 493 | dma_free_coherent(&p_hwfn->cdev->pdev->dev, |
a91eb52a | 494 | capacity * |
fe56b9e6 | 495 | sizeof(struct qed_spq_entry), |
a91eb52a YM |
496 | p_spq->p_virt, p_spq->p_phys); |
497 | } | |
fe56b9e6 YM |
498 | |
499 | qed_chain_free(p_hwfn->cdev, &p_spq->chain); | |
500 | ; | |
501 | kfree(p_spq); | |
502 | } | |
503 | ||
1a635e48 | 504 | int qed_spq_get_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry **pp_ent) |
fe56b9e6 YM |
505 | { |
506 | struct qed_spq *p_spq = p_hwfn->p_spq; | |
507 | struct qed_spq_entry *p_ent = NULL; | |
508 | int rc = 0; | |
509 | ||
510 | spin_lock_bh(&p_spq->lock); | |
511 | ||
512 | if (list_empty(&p_spq->free_pool)) { | |
513 | p_ent = kzalloc(sizeof(*p_ent), GFP_ATOMIC); | |
514 | if (!p_ent) { | |
1a635e48 YM |
515 | DP_NOTICE(p_hwfn, |
516 | "Failed to allocate an SPQ entry for a pending ramrod\n"); | |
fe56b9e6 YM |
517 | rc = -ENOMEM; |
518 | goto out_unlock; | |
519 | } | |
520 | p_ent->queue = &p_spq->unlimited_pending; | |
521 | } else { | |
522 | p_ent = list_first_entry(&p_spq->free_pool, | |
1a635e48 | 523 | struct qed_spq_entry, list); |
fe56b9e6 YM |
524 | list_del(&p_ent->list); |
525 | p_ent->queue = &p_spq->pending; | |
526 | } | |
527 | ||
528 | *pp_ent = p_ent; | |
529 | ||
530 | out_unlock: | |
531 | spin_unlock_bh(&p_spq->lock); | |
532 | return rc; | |
533 | } | |
534 | ||
535 | /* Locked variant; Should be called while the SPQ lock is taken */ | |
536 | static void __qed_spq_return_entry(struct qed_hwfn *p_hwfn, | |
537 | struct qed_spq_entry *p_ent) | |
538 | { | |
539 | list_add_tail(&p_ent->list, &p_hwfn->p_spq->free_pool); | |
540 | } | |
541 | ||
1a635e48 | 542 | void qed_spq_return_entry(struct qed_hwfn *p_hwfn, struct qed_spq_entry *p_ent) |
fe56b9e6 YM |
543 | { |
544 | spin_lock_bh(&p_hwfn->p_spq->lock); | |
545 | __qed_spq_return_entry(p_hwfn, p_ent); | |
546 | spin_unlock_bh(&p_hwfn->p_spq->lock); | |
547 | } | |
548 | ||
549 | /** | |
550 | * @brief qed_spq_add_entry - adds a new entry to the pending | |
551 | * list. Should be used while lock is being held. | |
552 | * | |
553 | * Addes an entry to the pending list is there is room (en empty | |
554 | * element is available in the free_pool), or else places the | |
555 | * entry in the unlimited_pending pool. | |
556 | * | |
557 | * @param p_hwfn | |
558 | * @param p_ent | |
559 | * @param priority | |
560 | * | |
561 | * @return int | |
562 | */ | |
1a635e48 YM |
563 | static int qed_spq_add_entry(struct qed_hwfn *p_hwfn, |
564 | struct qed_spq_entry *p_ent, | |
565 | enum spq_priority priority) | |
fe56b9e6 YM |
566 | { |
567 | struct qed_spq *p_spq = p_hwfn->p_spq; | |
568 | ||
569 | if (p_ent->queue == &p_spq->unlimited_pending) { | |
fe56b9e6 YM |
570 | |
571 | if (list_empty(&p_spq->free_pool)) { | |
572 | list_add_tail(&p_ent->list, &p_spq->unlimited_pending); | |
573 | p_spq->unlimited_pending_count++; | |
574 | ||
575 | return 0; | |
76a9a364 TT |
576 | } else { |
577 | struct qed_spq_entry *p_en2; | |
fe56b9e6 | 578 | |
76a9a364 | 579 | p_en2 = list_first_entry(&p_spq->free_pool, |
1a635e48 | 580 | struct qed_spq_entry, list); |
76a9a364 TT |
581 | list_del(&p_en2->list); |
582 | ||
583 | /* Copy the ring element physical pointer to the new | |
584 | * entry, since we are about to override the entire ring | |
585 | * entry and don't want to lose the pointer. | |
586 | */ | |
587 | p_ent->elem.data_ptr = p_en2->elem.data_ptr; | |
fe56b9e6 | 588 | |
76a9a364 | 589 | *p_en2 = *p_ent; |
fe56b9e6 | 590 | |
db511c37 YM |
591 | /* EBLOCK responsible to free the allocated p_ent */ |
592 | if (p_ent->comp_mode != QED_SPQ_MODE_EBLOCK) | |
593 | kfree(p_ent); | |
fe56b9e6 | 594 | |
76a9a364 TT |
595 | p_ent = p_en2; |
596 | } | |
fe56b9e6 YM |
597 | } |
598 | ||
599 | /* entry is to be placed in 'pending' queue */ | |
600 | switch (priority) { | |
601 | case QED_SPQ_PRIORITY_NORMAL: | |
602 | list_add_tail(&p_ent->list, &p_spq->pending); | |
603 | p_spq->normal_count++; | |
604 | break; | |
605 | case QED_SPQ_PRIORITY_HIGH: | |
606 | list_add(&p_ent->list, &p_spq->pending); | |
607 | p_spq->high_count++; | |
608 | break; | |
609 | default: | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
616 | /*************************************************************************** | |
617 | * Accessor | |
618 | ***************************************************************************/ | |
619 | u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn) | |
620 | { | |
621 | if (!p_hwfn->p_spq) | |
622 | return 0xffffffff; /* illegal */ | |
623 | return p_hwfn->p_spq->cid; | |
624 | } | |
625 | ||
626 | /*************************************************************************** | |
627 | * Posting new Ramrods | |
628 | ***************************************************************************/ | |
629 | static int qed_spq_post_list(struct qed_hwfn *p_hwfn, | |
1a635e48 | 630 | struct list_head *head, u32 keep_reserve) |
fe56b9e6 YM |
631 | { |
632 | struct qed_spq *p_spq = p_hwfn->p_spq; | |
633 | int rc; | |
634 | ||
635 | while (qed_chain_get_elem_left(&p_spq->chain) > keep_reserve && | |
636 | !list_empty(head)) { | |
637 | struct qed_spq_entry *p_ent = | |
638 | list_first_entry(head, struct qed_spq_entry, list); | |
639 | list_del(&p_ent->list); | |
640 | list_add_tail(&p_ent->list, &p_spq->completion_pending); | |
641 | p_spq->comp_sent_count++; | |
642 | ||
643 | rc = qed_spq_hw_post(p_hwfn, p_spq, p_ent); | |
644 | if (rc) { | |
645 | list_del(&p_ent->list); | |
646 | __qed_spq_return_entry(p_hwfn, p_ent); | |
647 | return rc; | |
648 | } | |
649 | } | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | static int qed_spq_pend_post(struct qed_hwfn *p_hwfn) | |
655 | { | |
656 | struct qed_spq *p_spq = p_hwfn->p_spq; | |
657 | struct qed_spq_entry *p_ent = NULL; | |
658 | ||
659 | while (!list_empty(&p_spq->free_pool)) { | |
660 | if (list_empty(&p_spq->unlimited_pending)) | |
661 | break; | |
662 | ||
663 | p_ent = list_first_entry(&p_spq->unlimited_pending, | |
1a635e48 | 664 | struct qed_spq_entry, list); |
fe56b9e6 YM |
665 | if (!p_ent) |
666 | return -EINVAL; | |
667 | ||
668 | list_del(&p_ent->list); | |
669 | ||
670 | qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); | |
671 | } | |
672 | ||
673 | return qed_spq_post_list(p_hwfn, &p_spq->pending, | |
674 | SPQ_HIGH_PRI_RESERVE_DEFAULT); | |
675 | } | |
676 | ||
677 | int qed_spq_post(struct qed_hwfn *p_hwfn, | |
1a635e48 | 678 | struct qed_spq_entry *p_ent, u8 *fw_return_code) |
fe56b9e6 YM |
679 | { |
680 | int rc = 0; | |
681 | struct qed_spq *p_spq = p_hwfn ? p_hwfn->p_spq : NULL; | |
682 | bool b_ret_ent = true; | |
683 | ||
684 | if (!p_hwfn) | |
685 | return -EINVAL; | |
686 | ||
687 | if (!p_ent) { | |
688 | DP_NOTICE(p_hwfn, "Got a NULL pointer\n"); | |
689 | return -EINVAL; | |
690 | } | |
691 | ||
692 | /* Complete the entry */ | |
693 | rc = qed_spq_fill_entry(p_hwfn, p_ent); | |
694 | ||
695 | spin_lock_bh(&p_spq->lock); | |
696 | ||
697 | /* Check return value after LOCK is taken for cleaner error flow */ | |
698 | if (rc) | |
699 | goto spq_post_fail; | |
700 | ||
701 | /* Add the request to the pending queue */ | |
702 | rc = qed_spq_add_entry(p_hwfn, p_ent, p_ent->priority); | |
703 | if (rc) | |
704 | goto spq_post_fail; | |
705 | ||
706 | rc = qed_spq_pend_post(p_hwfn); | |
707 | if (rc) { | |
708 | /* Since it's possible that pending failed for a different | |
709 | * entry [although unlikely], the failed entry was already | |
710 | * dealt with; No need to return it here. | |
711 | */ | |
712 | b_ret_ent = false; | |
713 | goto spq_post_fail; | |
714 | } | |
715 | ||
716 | spin_unlock_bh(&p_spq->lock); | |
717 | ||
718 | if (p_ent->comp_mode == QED_SPQ_MODE_EBLOCK) { | |
719 | /* For entries in QED BLOCK mode, the completion code cannot | |
720 | * perform the necessary cleanup - if it did, we couldn't | |
721 | * access p_ent here to see whether it's successful or not. | |
722 | * Thus, after gaining the answer perform the cleanup here. | |
723 | */ | |
724 | rc = qed_spq_block(p_hwfn, p_ent, fw_return_code); | |
db511c37 YM |
725 | |
726 | if (p_ent->queue == &p_spq->unlimited_pending) { | |
727 | /* This is an allocated p_ent which does not need to | |
728 | * return to pool. | |
729 | */ | |
730 | kfree(p_ent); | |
731 | return rc; | |
732 | } | |
733 | ||
fe56b9e6 YM |
734 | if (rc) |
735 | goto spq_post_fail2; | |
736 | ||
737 | /* return to pool */ | |
738 | qed_spq_return_entry(p_hwfn, p_ent); | |
739 | } | |
740 | return rc; | |
741 | ||
742 | spq_post_fail2: | |
743 | spin_lock_bh(&p_spq->lock); | |
744 | list_del(&p_ent->list); | |
745 | qed_chain_return_produced(&p_spq->chain); | |
746 | ||
747 | spq_post_fail: | |
748 | /* return to the free pool */ | |
749 | if (b_ret_ent) | |
750 | __qed_spq_return_entry(p_hwfn, p_ent); | |
751 | spin_unlock_bh(&p_spq->lock); | |
752 | ||
753 | return rc; | |
754 | } | |
755 | ||
756 | int qed_spq_completion(struct qed_hwfn *p_hwfn, | |
757 | __le16 echo, | |
758 | u8 fw_return_code, | |
759 | union event_ring_data *p_data) | |
760 | { | |
761 | struct qed_spq *p_spq; | |
762 | struct qed_spq_entry *p_ent = NULL; | |
763 | struct qed_spq_entry *tmp; | |
764 | struct qed_spq_entry *found = NULL; | |
765 | int rc; | |
766 | ||
767 | if (!p_hwfn) | |
768 | return -EINVAL; | |
769 | ||
770 | p_spq = p_hwfn->p_spq; | |
771 | if (!p_spq) | |
772 | return -EINVAL; | |
773 | ||
774 | spin_lock_bh(&p_spq->lock); | |
1a635e48 | 775 | list_for_each_entry_safe(p_ent, tmp, &p_spq->completion_pending, list) { |
fe56b9e6 | 776 | if (p_ent->elem.hdr.echo == echo) { |
76a9a364 TT |
777 | u16 pos = le16_to_cpu(echo) % SPQ_RING_SIZE; |
778 | ||
fe56b9e6 YM |
779 | list_del(&p_ent->list); |
780 | ||
76a9a364 TT |
781 | /* Avoid overriding of SPQ entries when getting |
782 | * out-of-order completions, by marking the completions | |
783 | * in a bitmap and increasing the chain consumer only | |
784 | * for the first successive completed entries. | |
785 | */ | |
59d3f1ce | 786 | __set_bit(pos, p_spq->p_comp_bitmap); |
76a9a364 TT |
787 | |
788 | while (test_bit(p_spq->comp_bitmap_idx, | |
789 | p_spq->p_comp_bitmap)) { | |
59d3f1ce MC |
790 | __clear_bit(p_spq->comp_bitmap_idx, |
791 | p_spq->p_comp_bitmap); | |
76a9a364 TT |
792 | p_spq->comp_bitmap_idx++; |
793 | qed_chain_return_produced(&p_spq->chain); | |
794 | } | |
795 | ||
fe56b9e6 YM |
796 | p_spq->comp_count++; |
797 | found = p_ent; | |
798 | break; | |
799 | } | |
76a9a364 TT |
800 | |
801 | /* This is relatively uncommon - depends on scenarios | |
802 | * which have mutliple per-PF sent ramrods. | |
803 | */ | |
804 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, | |
805 | "Got completion for echo %04x - doesn't match echo %04x in completion pending list\n", | |
806 | le16_to_cpu(echo), | |
807 | le16_to_cpu(p_ent->elem.hdr.echo)); | |
fe56b9e6 YM |
808 | } |
809 | ||
810 | /* Release lock before callback, as callback may post | |
811 | * an additional ramrod. | |
812 | */ | |
813 | spin_unlock_bh(&p_spq->lock); | |
814 | ||
815 | if (!found) { | |
816 | DP_NOTICE(p_hwfn, | |
525ef5c0 YM |
817 | "Failed to find an entry this EQE [echo %04x] completes\n", |
818 | le16_to_cpu(echo)); | |
fe56b9e6 YM |
819 | return -EEXIST; |
820 | } | |
821 | ||
525ef5c0 YM |
822 | DP_VERBOSE(p_hwfn, QED_MSG_SPQ, |
823 | "Complete EQE [echo %04x]: func %p cookie %p)\n", | |
824 | le16_to_cpu(echo), | |
fe56b9e6 YM |
825 | p_ent->comp_cb.function, p_ent->comp_cb.cookie); |
826 | if (found->comp_cb.function) | |
827 | found->comp_cb.function(p_hwfn, found->comp_cb.cookie, p_data, | |
828 | fw_return_code); | |
525ef5c0 YM |
829 | else |
830 | DP_VERBOSE(p_hwfn, | |
831 | QED_MSG_SPQ, | |
832 | "Got a completion without a callback function\n"); | |
fe56b9e6 | 833 | |
db511c37 YM |
834 | if ((found->comp_mode != QED_SPQ_MODE_EBLOCK) || |
835 | (found->queue == &p_spq->unlimited_pending)) | |
836 | /* EBLOCK is responsible for returning its own entry into the | |
837 | * free list, unless it originally added the entry into the | |
838 | * unlimited pending list. | |
839 | */ | |
fe56b9e6 YM |
840 | qed_spq_return_entry(p_hwfn, found); |
841 | ||
842 | /* Attempt to post pending requests */ | |
843 | spin_lock_bh(&p_spq->lock); | |
844 | rc = qed_spq_pend_post(p_hwfn); | |
845 | spin_unlock_bh(&p_spq->lock); | |
846 | ||
847 | return rc; | |
848 | } | |
849 | ||
850 | struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn) | |
851 | { | |
852 | struct qed_consq *p_consq; | |
853 | ||
854 | /* Allocate ConsQ struct */ | |
60fffb3b | 855 | p_consq = kzalloc(sizeof(*p_consq), GFP_KERNEL); |
2591c280 | 856 | if (!p_consq) |
fe56b9e6 | 857 | return NULL; |
fe56b9e6 YM |
858 | |
859 | /* Allocate and initialize EQ chain*/ | |
860 | if (qed_chain_alloc(p_hwfn->cdev, | |
861 | QED_CHAIN_USE_TO_PRODUCE, | |
862 | QED_CHAIN_MODE_PBL, | |
a91eb52a | 863 | QED_CHAIN_CNT_TYPE_U16, |
fe56b9e6 | 864 | QED_CHAIN_PAGE_SIZE / 0x80, |
2591c280 | 865 | 0x80, &p_consq->chain)) |
fe56b9e6 | 866 | goto consq_allocate_fail; |
fe56b9e6 YM |
867 | |
868 | return p_consq; | |
869 | ||
870 | consq_allocate_fail: | |
871 | qed_consq_free(p_hwfn, p_consq); | |
872 | return NULL; | |
873 | } | |
874 | ||
1a635e48 | 875 | void qed_consq_setup(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) |
fe56b9e6 YM |
876 | { |
877 | qed_chain_reset(&p_consq->chain); | |
878 | } | |
879 | ||
1a635e48 | 880 | void qed_consq_free(struct qed_hwfn *p_hwfn, struct qed_consq *p_consq) |
fe56b9e6 YM |
881 | { |
882 | if (!p_consq) | |
883 | return; | |
884 | qed_chain_free(p_hwfn->cdev, &p_consq->chain); | |
885 | kfree(p_consq); | |
886 | } |