1 /*
2 * Copyright (c) 2009-2013 Chelsio, Inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 * - Redistributions in binary form must reproduce the above
18 * copyright notice, this list of conditions and the following
19 * disclaimer in the documentation and/or other materials
20 * provided with the distribution.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
23 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
25 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
26 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
27 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
28 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
29 * SOFTWARE.
30 *
31 * $FreeBSD$
32 */
33 #ifndef __T4_H__
34 #define __T4_H__
35
36 /*
37 * Fixme: Adding missing defines
38 */
39 #define SGE_PF_KDOORBELL 0x0
40 #define QID_MASK 0xffff8000U
41 #define QID_SHIFT 15
42 #define QID(x) ((x) << QID_SHIFT)
43 #define DBPRIO 0x00004000U
44 #define PIDX_MASK 0x00003fffU
45 #define PIDX_SHIFT 0
46 #define PIDX(x) ((x) << PIDX_SHIFT)
47
48 #define SGE_PF_GTS 0x4
49 #define INGRESSQID_MASK 0xffff0000U
50 #define INGRESSQID_SHIFT 16
51 #define INGRESSQID(x) ((x) << INGRESSQID_SHIFT)
52 #define TIMERREG_MASK 0x0000e000U
53 #define TIMERREG_SHIFT 13
54 #define TIMERREG(x) ((x) << TIMERREG_SHIFT)
55 #define SEINTARM_MASK 0x00001000U
56 #define SEINTARM_SHIFT 12
57 #define SEINTARM(x) ((x) << SEINTARM_SHIFT)
58 #define CIDXINC_MASK 0x00000fffU
59 #define CIDXINC_SHIFT 0
60 #define CIDXINC(x) ((x) << CIDXINC_SHIFT)
61
62 #define T4_MAX_NUM_QP (1<<16)
63 #define T4_MAX_NUM_CQ (1<<15)
64 #define T4_MAX_NUM_PD (1<<15)
65 #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1)
66 #define T4_MAX_EQ_SIZE (65520 - T4_EQ_STATUS_ENTRIES)
67 #define T4_MAX_IQ_SIZE (65520 - 1)
68 #define T4_MAX_RQ_SIZE (8192 - T4_EQ_STATUS_ENTRIES)
69 #define T4_MAX_SQ_SIZE (T4_MAX_EQ_SIZE - 1)
70 #define T4_MAX_QP_DEPTH (T4_MAX_RQ_SIZE - 1)
71 #define T4_MAX_CQ_DEPTH (T4_MAX_IQ_SIZE - 1)
72 #define T4_MAX_NUM_STAG (1<<15)
73 #define T4_MAX_MR_SIZE (~0ULL - 1)
74 #define T4_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */
75 #define T4_STAG_UNSET 0xffffffff
76 #define T4_FW_MAJ 0
77 #define T4_EQ_STATUS_ENTRIES (L1_CACHE_BYTES > 64 ? 2 : 1)
78 #define A_PCIE_MA_SYNC 0x30b4
79
80 struct t4_status_page {
81 __be32 rsvd1; /* flit 0 - hw owns */
82 __be16 rsvd2;
83 __be16 qid;
84 __be16 cidx;
85 __be16 pidx;
86 u8 qp_err; /* flit 1 - sw owns */
87 u8 db_off;
88 u8 pad;
89 u16 host_wq_pidx;
90 u16 host_cidx;
91 u16 host_pidx;
92 };
93
94 #define T4_EQ_ENTRY_SIZE 64
95
96 #define T4_SQ_NUM_SLOTS 5
97 #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS)
98 #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
99 sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
100 #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \
101 sizeof(struct fw_ri_immd)))
102 #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \
103 sizeof(struct fw_ri_rdma_write_wr) - \
104 sizeof(struct fw_ri_immd)))
105 #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \
106 sizeof(struct fw_ri_rdma_write_wr) - \
107 sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))
108 #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \
109 sizeof(struct fw_ri_immd)) & ~31UL)
110 #define T4_MAX_FR_DEPTH (T4_MAX_FR_IMMD / sizeof(u64))
111
112 #define T4_RQ_NUM_SLOTS 2
113 #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS)
114 #define T4_MAX_RECV_SGE 4
115
116 union t4_wr {
117 struct fw_ri_res_wr res;
118 struct fw_ri_wr ri;
119 struct fw_ri_rdma_write_wr write;
120 struct fw_ri_send_wr send;
121 struct fw_ri_rdma_read_wr read;
122 struct fw_ri_bind_mw_wr bind;
123 struct fw_ri_fr_nsmr_wr fr;
124 struct fw_ri_inv_lstag_wr inv;
125 struct t4_status_page status;
126 __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS];
127 };
128
129 union t4_recv_wr {
130 struct fw_ri_recv_wr recv;
131 struct t4_status_page status;
132 __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS];
133 };
134
init_wr_hdr(union t4_wr * wqe,u16 wrid,enum fw_wr_opcodes opcode,u8 flags,u8 len16)135 static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid,
136 enum fw_wr_opcodes opcode, u8 flags, u8 len16)
137 {
138 wqe->send.opcode = (u8)opcode;
139 wqe->send.flags = flags;
140 wqe->send.wrid = wrid;
141 wqe->send.r1[0] = 0;
142 wqe->send.r1[1] = 0;
143 wqe->send.r1[2] = 0;
144 wqe->send.len16 = len16;
145 }
146
147 /* CQE/AE status codes */
148 #define T4_ERR_SUCCESS 0x0
149 #define T4_ERR_STAG 0x1 /* STAG invalid: either the */
150 /* STAG is offlimt, being 0, */
151 /* or STAG_key mismatch */
152 #define T4_ERR_PDID 0x2 /* PDID mismatch */
153 #define T4_ERR_QPID 0x3 /* QPID mismatch */
154 #define T4_ERR_ACCESS 0x4 /* Invalid access right */
155 #define T4_ERR_WRAP 0x5 /* Wrap error */
156 #define T4_ERR_BOUND 0x6 /* base and bounds voilation */
157 #define T4_ERR_INVALIDATE_SHARED_MR 0x7 /* attempt to invalidate a */
158 /* shared memory region */
159 #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8 /* attempt to invalidate a */
160 /* shared memory region */
161 #define T4_ERR_ECC 0x9 /* ECC error detected */
162 #define T4_ERR_ECC_PSTAG 0xA /* ECC error detected when */
163 /* reading PSTAG for a MW */
164 /* Invalidate */
165 #define T4_ERR_PBL_ADDR_BOUND 0xB /* pbl addr out of bounds: */
166 /* software error */
167 #define T4_ERR_SWFLUSH 0xC /* SW FLUSHED */
168 #define T4_ERR_CRC 0x10 /* CRC error */
169 #define T4_ERR_MARKER 0x11 /* Marker error */
170 #define T4_ERR_PDU_LEN_ERR 0x12 /* invalid PDU length */
171 #define T4_ERR_OUT_OF_RQE 0x13 /* out of RQE */
172 #define T4_ERR_DDP_VERSION 0x14 /* wrong DDP version */
173 #define T4_ERR_RDMA_VERSION 0x15 /* wrong RDMA version */
174 #define T4_ERR_OPCODE 0x16 /* invalid rdma opcode */
175 #define T4_ERR_DDP_QUEUE_NUM 0x17 /* invalid ddp queue number */
176 #define T4_ERR_MSN 0x18 /* MSN error */
177 #define T4_ERR_TBIT 0x19 /* tag bit not set correctly */
178 #define T4_ERR_MO 0x1A /* MO not 0 for TERMINATE */
179 /* or READ_REQ */
180 #define T4_ERR_MSN_GAP 0x1B
181 #define T4_ERR_MSN_RANGE 0x1C
182 #define T4_ERR_IRD_OVERFLOW 0x1D
183 #define T4_ERR_RQE_ADDR_BOUND 0x1E /* RQE addr out of bounds: */
184 /* software error */
185 #define T4_ERR_INTERNAL_ERR 0x1F /* internal error (opcode */
186 /* mismatch) */
187 /*
188 * CQE defs
189 */
190 struct t4_cqe {
191 __be32 header;
192 __be32 len;
193 union {
194 struct {
195 __be32 stag;
196 __be32 msn;
197 } rcqe;
198 struct {
199 u32 nada1;
200 u16 nada2;
201 u16 cidx;
202 } scqe;
203 struct {
204 __be32 wrid_hi;
205 __be32 wrid_low;
206 } gen;
207 } u;
208 __be64 reserved;
209 __be64 bits_type_ts;
210 };
211
212 /* macros for flit 0 of the cqe */
213
214 #define S_CQE_QPID 12
215 #define M_CQE_QPID 0xFFFFF
216 #define G_CQE_QPID(x) ((((x) >> S_CQE_QPID)) & M_CQE_QPID)
217 #define V_CQE_QPID(x) ((x)<<S_CQE_QPID)
218
219 #define S_CQE_SWCQE 11
220 #define M_CQE_SWCQE 0x1
221 #define G_CQE_SWCQE(x) ((((x) >> S_CQE_SWCQE)) & M_CQE_SWCQE)
222 #define V_CQE_SWCQE(x) ((x)<<S_CQE_SWCQE)
223
224 #define S_CQE_STATUS 5
225 #define M_CQE_STATUS 0x1F
226 #define G_CQE_STATUS(x) ((((x) >> S_CQE_STATUS)) & M_CQE_STATUS)
227 #define V_CQE_STATUS(x) ((x)<<S_CQE_STATUS)
228
229 #define S_CQE_TYPE 4
230 #define M_CQE_TYPE 0x1
231 #define G_CQE_TYPE(x) ((((x) >> S_CQE_TYPE)) & M_CQE_TYPE)
232 #define V_CQE_TYPE(x) ((x)<<S_CQE_TYPE)
233
234 #define S_CQE_OPCODE 0
235 #define M_CQE_OPCODE 0xF
236 #define G_CQE_OPCODE(x) ((((x) >> S_CQE_OPCODE)) & M_CQE_OPCODE)
237 #define V_CQE_OPCODE(x) ((x)<<S_CQE_OPCODE)
238
239 #define SW_CQE(x) (G_CQE_SWCQE(be32_to_cpu((x)->header)))
240 #define CQE_QPID(x) (G_CQE_QPID(be32_to_cpu((x)->header)))
241 #define CQE_TYPE(x) (G_CQE_TYPE(be32_to_cpu((x)->header)))
242 #define SQ_TYPE(x) (CQE_TYPE((x)))
243 #define RQ_TYPE(x) (!CQE_TYPE((x)))
244 #define CQE_STATUS(x) (G_CQE_STATUS(be32_to_cpu((x)->header)))
245 #define CQE_OPCODE(x) (G_CQE_OPCODE(be32_to_cpu((x)->header)))
246
247 #define CQE_SEND_OPCODE(x)(\
248 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND) || \
249 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \
250 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \
251 (G_CQE_OPCODE(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE_INV))
252
253 #define CQE_LEN(x) (be32_to_cpu((x)->len))
254
255 /* used for RQ completion processing */
256 #define CQE_WRID_STAG(x) (be32_to_cpu((x)->u.rcqe.stag))
257 #define CQE_WRID_MSN(x) (be32_to_cpu((x)->u.rcqe.msn))
258
259 /* used for SQ completion processing */
260 #define CQE_WRID_SQ_IDX(x) ((x)->u.scqe.cidx)
261
262 /* generic accessor macros */
263 #define CQE_WRID_HI(x) ((x)->u.gen.wrid_hi)
264 #define CQE_WRID_LOW(x) ((x)->u.gen.wrid_low)
265
266 /* macros for flit 3 of the cqe */
267 #define S_CQE_GENBIT 63
268 #define M_CQE_GENBIT 0x1
269 #define G_CQE_GENBIT(x) (((x) >> S_CQE_GENBIT) & M_CQE_GENBIT)
270 #define V_CQE_GENBIT(x) ((x)<<S_CQE_GENBIT)
271
272 #define S_CQE_OVFBIT 62
273 #define M_CQE_OVFBIT 0x1
274 #define G_CQE_OVFBIT(x) ((((x) >> S_CQE_OVFBIT)) & M_CQE_OVFBIT)
275
276 #define S_CQE_IQTYPE 60
277 #define M_CQE_IQTYPE 0x3
278 #define G_CQE_IQTYPE(x) ((((x) >> S_CQE_IQTYPE)) & M_CQE_IQTYPE)
279
280 #define M_CQE_TS 0x0fffffffffffffffULL
281 #define G_CQE_TS(x) ((x) & M_CQE_TS)
282
283 #define CQE_OVFBIT(x) ((unsigned)G_CQE_OVFBIT(be64_to_cpu((x)->bits_type_ts)))
284 #define CQE_GENBIT(x) ((unsigned)G_CQE_GENBIT(be64_to_cpu((x)->bits_type_ts)))
285 #define CQE_TS(x) (G_CQE_TS(be64_to_cpu((x)->bits_type_ts)))
286
287 struct t4_swsqe {
288 u64 wr_id;
289 struct t4_cqe cqe;
290 int read_len;
291 int opcode;
292 int complete;
293 int signaled;
294 u16 idx;
295 };
296
297 struct t4_sq {
298 union t4_wr *queue;
299 bus_addr_t dma_addr;
300 DECLARE_PCI_UNMAP_ADDR(mapping);
301 unsigned long phys_addr;
302 struct t4_swsqe *sw_sq;
303 struct t4_swsqe *oldest_read;
304 u64 udb;
305 size_t memsize;
306 u32 qid;
307 u16 in_use;
308 u16 size;
309 u16 cidx;
310 u16 pidx;
311 u16 wq_pidx;
312 u16 flags;
313 };
314
315 struct t4_swrqe {
316 u64 wr_id;
317 };
318
319 struct t4_rq {
320 union t4_recv_wr *queue;
321 bus_addr_t dma_addr;
322 DECLARE_PCI_UNMAP_ADDR(mapping);
323 struct t4_swrqe *sw_rq;
324 u64 udb;
325 size_t memsize;
326 u32 qid;
327 u32 msn;
328 u32 rqt_hwaddr;
329 u16 rqt_size;
330 u16 in_use;
331 u16 size;
332 u16 cidx;
333 u16 pidx;
334 u16 wq_pidx;
335 };
336
337 struct t4_wq {
338 struct t4_sq sq;
339 struct t4_rq rq;
340 void __iomem *db;
341 void __iomem *gts;
342 struct c4iw_rdev *rdev;
343 };
344
t4_rqes_posted(struct t4_wq * wq)345 static inline int t4_rqes_posted(struct t4_wq *wq)
346 {
347 return wq->rq.in_use;
348 }
349
t4_rq_empty(struct t4_wq * wq)350 static inline int t4_rq_empty(struct t4_wq *wq)
351 {
352 return wq->rq.in_use == 0;
353 }
354
t4_rq_full(struct t4_wq * wq)355 static inline int t4_rq_full(struct t4_wq *wq)
356 {
357 return wq->rq.in_use == (wq->rq.size - 1);
358 }
359
t4_rq_avail(struct t4_wq * wq)360 static inline u32 t4_rq_avail(struct t4_wq *wq)
361 {
362 return wq->rq.size - 1 - wq->rq.in_use;
363 }
364
t4_rq_produce(struct t4_wq * wq,u8 len16)365 static inline void t4_rq_produce(struct t4_wq *wq, u8 len16)
366 {
367 wq->rq.in_use++;
368 if (++wq->rq.pidx == wq->rq.size)
369 wq->rq.pidx = 0;
370 wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
371 if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS)
372 wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS;
373 }
374
t4_rq_consume(struct t4_wq * wq)375 static inline void t4_rq_consume(struct t4_wq *wq)
376 {
377 wq->rq.in_use--;
378 wq->rq.msn++;
379 if (++wq->rq.cidx == wq->rq.size)
380 wq->rq.cidx = 0;
381 }
382
t4_rq_host_wq_pidx(struct t4_wq * wq)383 static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq)
384 {
385 return wq->rq.queue[wq->rq.size].status.host_wq_pidx;
386 }
387
t4_rq_wq_size(struct t4_wq * wq)388 static inline u16 t4_rq_wq_size(struct t4_wq *wq)
389 {
390 return wq->rq.size * T4_RQ_NUM_SLOTS;
391 }
392
t4_sq_empty(struct t4_wq * wq)393 static inline int t4_sq_empty(struct t4_wq *wq)
394 {
395 return wq->sq.in_use == 0;
396 }
397
t4_sq_full(struct t4_wq * wq)398 static inline int t4_sq_full(struct t4_wq *wq)
399 {
400 return wq->sq.in_use == (wq->sq.size - 1);
401 }
402
t4_sq_avail(struct t4_wq * wq)403 static inline u32 t4_sq_avail(struct t4_wq *wq)
404 {
405 return wq->sq.size - 1 - wq->sq.in_use;
406 }
407
t4_sq_produce(struct t4_wq * wq,u8 len16)408 static inline void t4_sq_produce(struct t4_wq *wq, u8 len16)
409 {
410 wq->sq.in_use++;
411 if (++wq->sq.pidx == wq->sq.size)
412 wq->sq.pidx = 0;
413 wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE);
414 if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS)
415 wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS;
416 }
417
t4_sq_consume(struct t4_wq * wq)418 static inline void t4_sq_consume(struct t4_wq *wq)
419 {
420 wq->sq.in_use--;
421 if (++wq->sq.cidx == wq->sq.size)
422 wq->sq.cidx = 0;
423 }
424
t4_sq_host_wq_pidx(struct t4_wq * wq)425 static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq)
426 {
427 return wq->sq.queue[wq->sq.size].status.host_wq_pidx;
428 }
429
t4_sq_wq_size(struct t4_wq * wq)430 static inline u16 t4_sq_wq_size(struct t4_wq *wq)
431 {
432 return wq->sq.size * T4_SQ_NUM_SLOTS;
433 }
434
t4_ring_sq_db(struct t4_wq * wq,u16 inc)435 static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc)
436 {
437 wmb();
438 writel(QID(wq->sq.qid) | PIDX(inc), wq->db);
439 }
440
t4_ring_rq_db(struct t4_wq * wq,u16 inc)441 static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc)
442 {
443 wmb();
444 writel(QID(wq->rq.qid) | PIDX(inc), wq->db);
445 }
446
t4_wq_in_error(struct t4_wq * wq)447 static inline int t4_wq_in_error(struct t4_wq *wq)
448 {
449 return wq->rq.queue[wq->rq.size].status.qp_err;
450 }
451
t4_set_wq_in_error(struct t4_wq * wq)452 static inline void t4_set_wq_in_error(struct t4_wq *wq)
453 {
454 wq->rq.queue[wq->rq.size].status.qp_err = 1;
455 }
456
t4_disable_wq_db(struct t4_wq * wq)457 static inline void t4_disable_wq_db(struct t4_wq *wq)
458 {
459 wq->rq.queue[wq->rq.size].status.db_off = 1;
460 }
461
t4_enable_wq_db(struct t4_wq * wq)462 static inline void t4_enable_wq_db(struct t4_wq *wq)
463 {
464 wq->rq.queue[wq->rq.size].status.db_off = 0;
465 }
466
t4_wq_db_enabled(struct t4_wq * wq)467 static inline int t4_wq_db_enabled(struct t4_wq *wq)
468 {
469 return !wq->rq.queue[wq->rq.size].status.db_off;
470 }
471
472 struct t4_cq {
473 struct t4_cqe *queue;
474 bus_addr_t dma_addr;
475 DECLARE_PCI_UNMAP_ADDR(mapping);
476 struct t4_cqe *sw_queue;
477 void __iomem *gts;
478 struct c4iw_rdev *rdev;
479 u64 ugts;
480 size_t memsize;
481 __be64 bits_type_ts;
482 u32 cqid;
483 u16 size; /* including status page */
484 u16 cidx;
485 u16 sw_pidx;
486 u16 sw_cidx;
487 u16 sw_in_use;
488 u16 cidx_inc;
489 u8 gen;
490 u8 error;
491 };
492
t4_arm_cq(struct t4_cq * cq,int se)493 static inline int t4_arm_cq(struct t4_cq *cq, int se)
494 {
495 u32 val;
496
497 while (cq->cidx_inc > CIDXINC_MASK) {
498 val = SEINTARM(0) | CIDXINC(CIDXINC_MASK) | TIMERREG(7) |
499 INGRESSQID(cq->cqid);
500 writel(val, cq->gts);
501 cq->cidx_inc -= CIDXINC_MASK;
502 }
503 val = SEINTARM(se) | CIDXINC(cq->cidx_inc) | TIMERREG(6) |
504 INGRESSQID(cq->cqid);
505 writel(val, cq->gts);
506 cq->cidx_inc = 0;
507 return 0;
508 }
509
t4_swcq_produce(struct t4_cq * cq)510 static inline void t4_swcq_produce(struct t4_cq *cq)
511 {
512 cq->sw_in_use++;
513 if (++cq->sw_pidx == cq->size)
514 cq->sw_pidx = 0;
515 }
516
t4_swcq_consume(struct t4_cq * cq)517 static inline void t4_swcq_consume(struct t4_cq *cq)
518 {
519 cq->sw_in_use--;
520 if (++cq->sw_cidx == cq->size)
521 cq->sw_cidx = 0;
522 }
523
t4_hwcq_consume(struct t4_cq * cq)524 static inline void t4_hwcq_consume(struct t4_cq *cq)
525 {
526 cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts;
527 if (++cq->cidx_inc == (cq->size >> 4)) {
528 u32 val;
529
530 val = SEINTARM(0) | CIDXINC(cq->cidx_inc) | TIMERREG(7) |
531 INGRESSQID(cq->cqid);
532 writel(val, cq->gts);
533 cq->cidx_inc = 0;
534 }
535 if (++cq->cidx == cq->size) {
536 cq->cidx = 0;
537 cq->gen ^= 1;
538 }
539 }
540
t4_valid_cqe(struct t4_cq * cq,struct t4_cqe * cqe)541 static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe)
542 {
543 return (CQE_GENBIT(cqe) == cq->gen);
544 }
545
t4_next_hw_cqe(struct t4_cq * cq,struct t4_cqe ** cqe)546 static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
547 {
548 int ret;
549 u16 prev_cidx;
550
551 if (cq->cidx == 0)
552 prev_cidx = cq->size - 1;
553 else
554 prev_cidx = cq->cidx - 1;
555
556 if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) {
557 ret = -EOVERFLOW;
558 cq->error = 1;
559 printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid);
560 } else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) {
561 *cqe = &cq->queue[cq->cidx];
562 ret = 0;
563 } else
564 ret = -ENODATA;
565 return ret;
566 }
567
t4_next_sw_cqe(struct t4_cq * cq)568 static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq)
569 {
570 if (cq->sw_in_use)
571 return &cq->sw_queue[cq->sw_cidx];
572 return NULL;
573 }
574
t4_next_cqe(struct t4_cq * cq,struct t4_cqe ** cqe)575 static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe)
576 {
577 int ret = 0;
578
579 if (cq->error)
580 ret = -ENODATA;
581 else if (cq->sw_in_use)
582 *cqe = &cq->sw_queue[cq->sw_cidx];
583 else
584 ret = t4_next_hw_cqe(cq, cqe);
585 return ret;
586 }
587
t4_cq_in_error(struct t4_cq * cq)588 static inline int t4_cq_in_error(struct t4_cq *cq)
589 {
590 return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err;
591 }
592
t4_set_cq_in_error(struct t4_cq * cq)593 static inline void t4_set_cq_in_error(struct t4_cq *cq)
594 {
595 ((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1;
596 }
597 #endif
598