Commit | Line | Data |
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fa90c54f AV |
1 | /* |
2 | * QLogic Fibre Channel HBA Driver | |
3 | * Copyright (c) 2003-2005 QLogic Corporation | |
1da177e4 | 4 | * |
fa90c54f AV |
5 | * See LICENSE.qla2xxx for copyright and licensing details. |
6 | */ | |
1da177e4 LT |
7 | #include "qla_def.h" |
8 | ||
9 | #include <linux/blkdev.h> | |
10 | #include <linux/delay.h> | |
11 | ||
12 | #include <scsi/scsi_tcq.h> | |
13 | ||
14 | static inline uint16_t qla2x00_get_cmd_direction(struct scsi_cmnd *cmd); | |
15 | static inline cont_entry_t *qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *); | |
16 | static inline cont_a64_entry_t *qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *); | |
17 | static request_t *qla2x00_req_pkt(scsi_qla_host_t *ha); | |
413975a0 | 18 | static void qla2x00_isp_cmd(scsi_qla_host_t *ha); |
1da177e4 LT |
19 | |
20 | /** | |
21 | * qla2x00_get_cmd_direction() - Determine control_flag data direction. | |
22 | * @cmd: SCSI command | |
23 | * | |
24 | * Returns the proper CF_* direction based on CDB. | |
25 | */ | |
26 | static inline uint16_t | |
27 | qla2x00_get_cmd_direction(struct scsi_cmnd *cmd) | |
28 | { | |
29 | uint16_t cflags; | |
30 | ||
31 | cflags = 0; | |
32 | ||
33 | /* Set transfer direction */ | |
34 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
35 | cflags = CF_WRITE; | |
36 | else if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
37 | cflags = CF_READ; | |
38 | return (cflags); | |
39 | } | |
40 | ||
41 | /** | |
42 | * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and | |
43 | * Continuation Type 0 IOCBs to allocate. | |
44 | * | |
45 | * @dsds: number of data segment decriptors needed | |
46 | * | |
47 | * Returns the number of IOCB entries needed to store @dsds. | |
48 | */ | |
49 | uint16_t | |
50 | qla2x00_calc_iocbs_32(uint16_t dsds) | |
51 | { | |
52 | uint16_t iocbs; | |
53 | ||
54 | iocbs = 1; | |
55 | if (dsds > 3) { | |
56 | iocbs += (dsds - 3) / 7; | |
57 | if ((dsds - 3) % 7) | |
58 | iocbs++; | |
59 | } | |
60 | return (iocbs); | |
61 | } | |
62 | ||
63 | /** | |
64 | * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and | |
65 | * Continuation Type 1 IOCBs to allocate. | |
66 | * | |
67 | * @dsds: number of data segment decriptors needed | |
68 | * | |
69 | * Returns the number of IOCB entries needed to store @dsds. | |
70 | */ | |
71 | uint16_t | |
72 | qla2x00_calc_iocbs_64(uint16_t dsds) | |
73 | { | |
74 | uint16_t iocbs; | |
75 | ||
76 | iocbs = 1; | |
77 | if (dsds > 2) { | |
78 | iocbs += (dsds - 2) / 5; | |
79 | if ((dsds - 2) % 5) | |
80 | iocbs++; | |
81 | } | |
82 | return (iocbs); | |
83 | } | |
84 | ||
85 | /** | |
86 | * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB. | |
87 | * @ha: HA context | |
88 | * | |
89 | * Returns a pointer to the Continuation Type 0 IOCB packet. | |
90 | */ | |
91 | static inline cont_entry_t * | |
92 | qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *ha) | |
93 | { | |
94 | cont_entry_t *cont_pkt; | |
95 | ||
96 | /* Adjust ring index. */ | |
97 | ha->req_ring_index++; | |
98 | if (ha->req_ring_index == ha->request_q_length) { | |
99 | ha->req_ring_index = 0; | |
100 | ha->request_ring_ptr = ha->request_ring; | |
101 | } else { | |
102 | ha->request_ring_ptr++; | |
103 | } | |
104 | ||
105 | cont_pkt = (cont_entry_t *)ha->request_ring_ptr; | |
106 | ||
107 | /* Load packet defaults. */ | |
108 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
109 | __constant_cpu_to_le32(CONTINUE_TYPE); | |
110 | ||
111 | return (cont_pkt); | |
112 | } | |
113 | ||
114 | /** | |
115 | * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB. | |
116 | * @ha: HA context | |
117 | * | |
118 | * Returns a pointer to the continuation type 1 IOCB packet. | |
119 | */ | |
120 | static inline cont_a64_entry_t * | |
121 | qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *ha) | |
122 | { | |
123 | cont_a64_entry_t *cont_pkt; | |
124 | ||
125 | /* Adjust ring index. */ | |
126 | ha->req_ring_index++; | |
127 | if (ha->req_ring_index == ha->request_q_length) { | |
128 | ha->req_ring_index = 0; | |
129 | ha->request_ring_ptr = ha->request_ring; | |
130 | } else { | |
131 | ha->request_ring_ptr++; | |
132 | } | |
133 | ||
134 | cont_pkt = (cont_a64_entry_t *)ha->request_ring_ptr; | |
135 | ||
136 | /* Load packet defaults. */ | |
137 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
138 | __constant_cpu_to_le32(CONTINUE_A64_TYPE); | |
139 | ||
140 | return (cont_pkt); | |
141 | } | |
142 | ||
143 | /** | |
144 | * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit | |
145 | * capable IOCB types. | |
146 | * | |
147 | * @sp: SRB command to process | |
148 | * @cmd_pkt: Command type 2 IOCB | |
149 | * @tot_dsds: Total number of segments to transfer | |
150 | */ | |
151 | void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt, | |
152 | uint16_t tot_dsds) | |
153 | { | |
154 | uint16_t avail_dsds; | |
155 | uint32_t *cur_dsd; | |
156 | scsi_qla_host_t *ha; | |
157 | struct scsi_cmnd *cmd; | |
158 | ||
159 | cmd = sp->cmd; | |
160 | ||
161 | /* Update entry type to indicate Command Type 2 IOCB */ | |
162 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
163 | __constant_cpu_to_le32(COMMAND_TYPE); | |
164 | ||
165 | /* No data transfer */ | |
166 | if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) { | |
167 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); | |
168 | return; | |
169 | } | |
170 | ||
171 | ha = sp->ha; | |
172 | ||
173 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd)); | |
174 | ||
175 | /* Three DSDs are available in the Command Type 2 IOCB */ | |
176 | avail_dsds = 3; | |
177 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
178 | ||
179 | /* Load data segments */ | |
180 | if (cmd->use_sg != 0) { | |
181 | struct scatterlist *cur_seg; | |
182 | struct scatterlist *end_seg; | |
183 | ||
184 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
185 | end_seg = cur_seg + tot_dsds; | |
186 | while (cur_seg < end_seg) { | |
187 | cont_entry_t *cont_pkt; | |
188 | ||
189 | /* Allocate additional continuation packets? */ | |
190 | if (avail_dsds == 0) { | |
191 | /* | |
192 | * Seven DSDs are available in the Continuation | |
193 | * Type 0 IOCB. | |
194 | */ | |
195 | cont_pkt = qla2x00_prep_cont_type0_iocb(ha); | |
196 | cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address; | |
197 | avail_dsds = 7; | |
198 | } | |
199 | ||
200 | *cur_dsd++ = cpu_to_le32(sg_dma_address(cur_seg)); | |
201 | *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg)); | |
202 | avail_dsds--; | |
203 | ||
204 | cur_seg++; | |
205 | } | |
206 | } else { | |
83021920 | 207 | *cur_dsd++ = cpu_to_le32(sp->dma_handle); |
1da177e4 LT |
208 | *cur_dsd++ = cpu_to_le32(cmd->request_bufflen); |
209 | } | |
210 | } | |
211 | ||
212 | /** | |
213 | * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit | |
214 | * capable IOCB types. | |
215 | * | |
216 | * @sp: SRB command to process | |
217 | * @cmd_pkt: Command type 3 IOCB | |
218 | * @tot_dsds: Total number of segments to transfer | |
219 | */ | |
220 | void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt, | |
221 | uint16_t tot_dsds) | |
222 | { | |
223 | uint16_t avail_dsds; | |
224 | uint32_t *cur_dsd; | |
225 | scsi_qla_host_t *ha; | |
226 | struct scsi_cmnd *cmd; | |
227 | ||
228 | cmd = sp->cmd; | |
229 | ||
230 | /* Update entry type to indicate Command Type 3 IOCB */ | |
231 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
232 | __constant_cpu_to_le32(COMMAND_A64_TYPE); | |
233 | ||
234 | /* No data transfer */ | |
235 | if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) { | |
236 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); | |
237 | return; | |
238 | } | |
239 | ||
240 | ha = sp->ha; | |
241 | ||
242 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(cmd)); | |
243 | ||
244 | /* Two DSDs are available in the Command Type 3 IOCB */ | |
245 | avail_dsds = 2; | |
246 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
247 | ||
248 | /* Load data segments */ | |
249 | if (cmd->use_sg != 0) { | |
250 | struct scatterlist *cur_seg; | |
251 | struct scatterlist *end_seg; | |
252 | ||
253 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
254 | end_seg = cur_seg + tot_dsds; | |
255 | while (cur_seg < end_seg) { | |
256 | dma_addr_t sle_dma; | |
257 | cont_a64_entry_t *cont_pkt; | |
258 | ||
259 | /* Allocate additional continuation packets? */ | |
260 | if (avail_dsds == 0) { | |
261 | /* | |
262 | * Five DSDs are available in the Continuation | |
263 | * Type 1 IOCB. | |
264 | */ | |
265 | cont_pkt = qla2x00_prep_cont_type1_iocb(ha); | |
266 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; | |
267 | avail_dsds = 5; | |
268 | } | |
269 | ||
270 | sle_dma = sg_dma_address(cur_seg); | |
271 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
272 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
273 | *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg)); | |
274 | avail_dsds--; | |
275 | ||
276 | cur_seg++; | |
277 | } | |
278 | } else { | |
83021920 AV |
279 | *cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle)); |
280 | *cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle)); | |
1da177e4 LT |
281 | *cur_dsd++ = cpu_to_le32(cmd->request_bufflen); |
282 | } | |
283 | } | |
284 | ||
285 | /** | |
286 | * qla2x00_start_scsi() - Send a SCSI command to the ISP | |
287 | * @sp: command to send to the ISP | |
288 | * | |
289 | * Returns non-zero if a failure occured, else zero. | |
290 | */ | |
291 | int | |
292 | qla2x00_start_scsi(srb_t *sp) | |
293 | { | |
294 | int ret; | |
295 | unsigned long flags; | |
296 | scsi_qla_host_t *ha; | |
1da177e4 LT |
297 | struct scsi_cmnd *cmd; |
298 | uint32_t *clr_ptr; | |
299 | uint32_t index; | |
300 | uint32_t handle; | |
301 | cmd_entry_t *cmd_pkt; | |
1da177e4 LT |
302 | struct scatterlist *sg; |
303 | uint16_t cnt; | |
304 | uint16_t req_cnt; | |
305 | uint16_t tot_dsds; | |
3d71644c | 306 | struct device_reg_2xxx __iomem *reg; |
1da177e4 LT |
307 | |
308 | /* Setup device pointers. */ | |
309 | ret = 0; | |
bdf79621 | 310 | ha = sp->ha; |
3d71644c | 311 | reg = &ha->iobase->isp; |
1da177e4 | 312 | cmd = sp->cmd; |
83021920 AV |
313 | /* So we know we haven't pci_map'ed anything yet */ |
314 | tot_dsds = 0; | |
1da177e4 LT |
315 | |
316 | /* Send marker if required */ | |
317 | if (ha->marker_needed != 0) { | |
318 | if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) { | |
319 | return (QLA_FUNCTION_FAILED); | |
320 | } | |
321 | ha->marker_needed = 0; | |
322 | } | |
323 | ||
324 | /* Acquire ring specific lock */ | |
325 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
326 | ||
327 | /* Check for room in outstanding command list. */ | |
328 | handle = ha->current_outstanding_cmd; | |
329 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { | |
330 | handle++; | |
331 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
332 | handle = 1; | |
333 | if (ha->outstanding_cmds[handle] == 0) | |
334 | break; | |
335 | } | |
336 | if (index == MAX_OUTSTANDING_COMMANDS) | |
337 | goto queuing_error; | |
338 | ||
83021920 AV |
339 | /* Map the sg table so we have an accurate count of sg entries needed */ |
340 | if (cmd->use_sg) { | |
341 | sg = (struct scatterlist *) cmd->request_buffer; | |
342 | tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg, | |
343 | cmd->sc_data_direction); | |
344 | if (tot_dsds == 0) | |
345 | goto queuing_error; | |
346 | } else if (cmd->request_bufflen) { | |
347 | dma_addr_t req_dma; | |
348 | ||
349 | req_dma = pci_map_single(ha->pdev, cmd->request_buffer, | |
350 | cmd->request_bufflen, cmd->sc_data_direction); | |
351 | if (dma_mapping_error(req_dma)) | |
352 | goto queuing_error; | |
353 | ||
354 | sp->dma_handle = req_dma; | |
355 | tot_dsds = 1; | |
356 | } | |
357 | ||
1da177e4 | 358 | /* Calculate the number of request entries needed. */ |
abbd8870 | 359 | req_cnt = ha->isp_ops.calc_req_entries(tot_dsds); |
1da177e4 LT |
360 | if (ha->req_q_cnt < (req_cnt + 2)) { |
361 | cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg)); | |
362 | if (ha->req_ring_index < cnt) | |
363 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
364 | else | |
365 | ha->req_q_cnt = ha->request_q_length - | |
366 | (ha->req_ring_index - cnt); | |
367 | } | |
368 | if (ha->req_q_cnt < (req_cnt + 2)) | |
369 | goto queuing_error; | |
370 | ||
1da177e4 LT |
371 | /* Build command packet */ |
372 | ha->current_outstanding_cmd = handle; | |
373 | ha->outstanding_cmds[handle] = sp; | |
374 | sp->ha = ha; | |
375 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; | |
376 | ha->req_q_cnt -= req_cnt; | |
377 | ||
378 | cmd_pkt = (cmd_entry_t *)ha->request_ring_ptr; | |
379 | cmd_pkt->handle = handle; | |
380 | /* Zero out remaining portion of packet. */ | |
381 | clr_ptr = (uint32_t *)cmd_pkt + 2; | |
382 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
383 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
384 | ||
bdf79621 AV |
385 | /* Set target ID and LUN number*/ |
386 | SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id); | |
387 | cmd_pkt->lun = cpu_to_le16(sp->cmd->device->lun); | |
1da177e4 LT |
388 | |
389 | /* Update tagged queuing modifier */ | |
390 | cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG); | |
1da177e4 | 391 | |
1da177e4 LT |
392 | /* Load SCSI command packet. */ |
393 | memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len); | |
394 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen); | |
395 | ||
396 | /* Build IOCB segments */ | |
abbd8870 | 397 | ha->isp_ops.build_iocbs(sp, cmd_pkt, tot_dsds); |
1da177e4 LT |
398 | |
399 | /* Set total data segment count. */ | |
400 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
401 | wmb(); | |
402 | ||
403 | /* Adjust ring index. */ | |
404 | ha->req_ring_index++; | |
405 | if (ha->req_ring_index == ha->request_q_length) { | |
406 | ha->req_ring_index = 0; | |
407 | ha->request_ring_ptr = ha->request_ring; | |
408 | } else | |
409 | ha->request_ring_ptr++; | |
410 | ||
1da177e4 | 411 | sp->flags |= SRB_DMA_VALID; |
1da177e4 LT |
412 | |
413 | /* Set chip new ring index. */ | |
414 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), ha->req_ring_index); | |
415 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */ | |
416 | ||
4fdfefe5 AV |
417 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
418 | if (ha->flags.process_response_queue && | |
419 | ha->response_ring_ptr->signature != RESPONSE_PROCESSED) | |
420 | qla2x00_process_response_queue(ha); | |
421 | ||
1da177e4 LT |
422 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
423 | return (QLA_SUCCESS); | |
424 | ||
425 | queuing_error: | |
83021920 AV |
426 | if (cmd->use_sg && tot_dsds) { |
427 | sg = (struct scatterlist *) cmd->request_buffer; | |
428 | pci_unmap_sg(ha->pdev, sg, cmd->use_sg, | |
429 | cmd->sc_data_direction); | |
430 | } else if (tot_dsds) { | |
431 | pci_unmap_single(ha->pdev, sp->dma_handle, | |
432 | cmd->request_bufflen, cmd->sc_data_direction); | |
433 | } | |
1da177e4 LT |
434 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
435 | ||
436 | return (QLA_FUNCTION_FAILED); | |
437 | } | |
438 | ||
439 | /** | |
440 | * qla2x00_marker() - Send a marker IOCB to the firmware. | |
441 | * @ha: HA context | |
442 | * @loop_id: loop ID | |
443 | * @lun: LUN | |
444 | * @type: marker modifier | |
445 | * | |
446 | * Can be called from both normal and interrupt context. | |
447 | * | |
448 | * Returns non-zero if a failure occured, else zero. | |
449 | */ | |
fa2a1ce5 | 450 | int |
1da177e4 LT |
451 | __qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun, |
452 | uint8_t type) | |
453 | { | |
2b6c0cee AV |
454 | mrk_entry_t *mrk; |
455 | struct mrk_entry_24xx *mrk24; | |
1da177e4 | 456 | |
2b6c0cee AV |
457 | mrk24 = NULL; |
458 | mrk = (mrk_entry_t *)qla2x00_req_pkt(ha); | |
459 | if (mrk == NULL) { | |
460 | DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n", | |
461 | __func__, ha->host_no)); | |
1da177e4 LT |
462 | |
463 | return (QLA_FUNCTION_FAILED); | |
464 | } | |
465 | ||
2b6c0cee AV |
466 | mrk->entry_type = MARKER_TYPE; |
467 | mrk->modifier = type; | |
1da177e4 | 468 | if (type != MK_SYNC_ALL) { |
044cc6c8 | 469 | if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) { |
2b6c0cee AV |
470 | mrk24 = (struct mrk_entry_24xx *) mrk; |
471 | mrk24->nport_handle = cpu_to_le16(loop_id); | |
472 | mrk24->lun[1] = LSB(lun); | |
473 | mrk24->lun[2] = MSB(lun); | |
b797b6de | 474 | host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun)); |
2b6c0cee AV |
475 | } else { |
476 | SET_TARGET_ID(ha, mrk->target, loop_id); | |
477 | mrk->lun = cpu_to_le16(lun); | |
478 | } | |
1da177e4 LT |
479 | } |
480 | wmb(); | |
481 | ||
1da177e4 LT |
482 | qla2x00_isp_cmd(ha); |
483 | ||
484 | return (QLA_SUCCESS); | |
485 | } | |
486 | ||
fa2a1ce5 | 487 | int |
1da177e4 LT |
488 | qla2x00_marker(scsi_qla_host_t *ha, uint16_t loop_id, uint16_t lun, |
489 | uint8_t type) | |
490 | { | |
491 | int ret; | |
492 | unsigned long flags = 0; | |
493 | ||
494 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
495 | ret = __qla2x00_marker(ha, loop_id, lun, type); | |
496 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
497 | ||
498 | return (ret); | |
499 | } | |
500 | ||
501 | /** | |
502 | * qla2x00_req_pkt() - Retrieve a request packet from the request ring. | |
503 | * @ha: HA context | |
504 | * | |
505 | * Note: The caller must hold the hardware lock before calling this routine. | |
506 | * | |
507 | * Returns NULL if function failed, else, a pointer to the request packet. | |
508 | */ | |
509 | static request_t * | |
510 | qla2x00_req_pkt(scsi_qla_host_t *ha) | |
511 | { | |
2b6c0cee | 512 | device_reg_t __iomem *reg = ha->iobase; |
1da177e4 LT |
513 | request_t *pkt = NULL; |
514 | uint16_t cnt; | |
515 | uint32_t *dword_ptr; | |
516 | uint32_t timer; | |
517 | uint16_t req_cnt = 1; | |
518 | ||
519 | /* Wait 1 second for slot. */ | |
520 | for (timer = HZ; timer; timer--) { | |
521 | if ((req_cnt + 2) >= ha->req_q_cnt) { | |
522 | /* Calculate number of free request entries. */ | |
044cc6c8 | 523 | if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) |
2b6c0cee AV |
524 | cnt = (uint16_t)RD_REG_DWORD( |
525 | ®->isp24.req_q_out); | |
526 | else | |
527 | cnt = qla2x00_debounce_register( | |
528 | ISP_REQ_Q_OUT(ha, ®->isp)); | |
1da177e4 LT |
529 | if (ha->req_ring_index < cnt) |
530 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
531 | else | |
532 | ha->req_q_cnt = ha->request_q_length - | |
533 | (ha->req_ring_index - cnt); | |
534 | } | |
535 | /* If room for request in request ring. */ | |
536 | if ((req_cnt + 2) < ha->req_q_cnt) { | |
537 | ha->req_q_cnt--; | |
538 | pkt = ha->request_ring_ptr; | |
539 | ||
540 | /* Zero out packet. */ | |
541 | dword_ptr = (uint32_t *)pkt; | |
542 | for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++) | |
543 | *dword_ptr++ = 0; | |
544 | ||
545 | /* Set system defined field. */ | |
546 | pkt->sys_define = (uint8_t)ha->req_ring_index; | |
547 | ||
548 | /* Set entry count. */ | |
549 | pkt->entry_count = 1; | |
550 | ||
551 | break; | |
552 | } | |
553 | ||
554 | /* Release ring specific lock */ | |
555 | spin_unlock(&ha->hardware_lock); | |
556 | ||
557 | udelay(2); /* 2 us */ | |
558 | ||
559 | /* Check for pending interrupts. */ | |
560 | /* During init we issue marker directly */ | |
561 | if (!ha->marker_needed) | |
562 | qla2x00_poll(ha); | |
563 | ||
564 | spin_lock_irq(&ha->hardware_lock); | |
565 | } | |
566 | if (!pkt) { | |
567 | DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__)); | |
568 | } | |
569 | ||
570 | return (pkt); | |
571 | } | |
572 | ||
573 | /** | |
574 | * qla2x00_isp_cmd() - Modify the request ring pointer. | |
575 | * @ha: HA context | |
576 | * | |
577 | * Note: The caller must hold the hardware lock before calling this routine. | |
578 | */ | |
413975a0 | 579 | static void |
1da177e4 LT |
580 | qla2x00_isp_cmd(scsi_qla_host_t *ha) |
581 | { | |
2b6c0cee | 582 | device_reg_t __iomem *reg = ha->iobase; |
1da177e4 LT |
583 | |
584 | DEBUG5(printk("%s(): IOCB data:\n", __func__)); | |
585 | DEBUG5(qla2x00_dump_buffer( | |
586 | (uint8_t *)ha->request_ring_ptr, REQUEST_ENTRY_SIZE)); | |
587 | ||
588 | /* Adjust ring index. */ | |
589 | ha->req_ring_index++; | |
590 | if (ha->req_ring_index == ha->request_q_length) { | |
591 | ha->req_ring_index = 0; | |
592 | ha->request_ring_ptr = ha->request_ring; | |
593 | } else | |
594 | ha->request_ring_ptr++; | |
595 | ||
596 | /* Set chip new ring index. */ | |
044cc6c8 | 597 | if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) { |
2b6c0cee AV |
598 | WRT_REG_DWORD(®->isp24.req_q_in, ha->req_ring_index); |
599 | RD_REG_DWORD_RELAXED(®->isp24.req_q_in); | |
600 | } else { | |
601 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), ha->req_ring_index); | |
602 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp)); | |
603 | } | |
604 | ||
605 | } | |
606 | ||
607 | /** | |
608 | * qla24xx_calc_iocbs() - Determine number of Command Type 3 and | |
609 | * Continuation Type 1 IOCBs to allocate. | |
610 | * | |
611 | * @dsds: number of data segment decriptors needed | |
612 | * | |
613 | * Returns the number of IOCB entries needed to store @dsds. | |
614 | */ | |
615 | static inline uint16_t | |
616 | qla24xx_calc_iocbs(uint16_t dsds) | |
617 | { | |
618 | uint16_t iocbs; | |
619 | ||
620 | iocbs = 1; | |
621 | if (dsds > 1) { | |
622 | iocbs += (dsds - 1) / 5; | |
623 | if ((dsds - 1) % 5) | |
624 | iocbs++; | |
625 | } | |
626 | return iocbs; | |
627 | } | |
628 | ||
629 | /** | |
630 | * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7 | |
631 | * IOCB types. | |
632 | * | |
633 | * @sp: SRB command to process | |
634 | * @cmd_pkt: Command type 3 IOCB | |
635 | * @tot_dsds: Total number of segments to transfer | |
636 | */ | |
637 | static inline void | |
638 | qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt, | |
639 | uint16_t tot_dsds) | |
640 | { | |
641 | uint16_t avail_dsds; | |
642 | uint32_t *cur_dsd; | |
643 | scsi_qla_host_t *ha; | |
644 | struct scsi_cmnd *cmd; | |
645 | ||
646 | cmd = sp->cmd; | |
647 | ||
648 | /* Update entry type to indicate Command Type 3 IOCB */ | |
649 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
650 | __constant_cpu_to_le32(COMMAND_TYPE_7); | |
651 | ||
652 | /* No data transfer */ | |
653 | if (cmd->request_bufflen == 0 || cmd->sc_data_direction == DMA_NONE) { | |
654 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); | |
655 | return; | |
656 | } | |
657 | ||
658 | ha = sp->ha; | |
659 | ||
660 | /* Set transfer direction */ | |
661 | if (cmd->sc_data_direction == DMA_TO_DEVICE) | |
662 | cmd_pkt->task_mgmt_flags = | |
663 | __constant_cpu_to_le16(TMF_WRITE_DATA); | |
664 | else if (cmd->sc_data_direction == DMA_FROM_DEVICE) | |
665 | cmd_pkt->task_mgmt_flags = | |
666 | __constant_cpu_to_le16(TMF_READ_DATA); | |
667 | ||
668 | /* One DSD is available in the Command Type 3 IOCB */ | |
669 | avail_dsds = 1; | |
670 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
671 | ||
672 | /* Load data segments */ | |
673 | if (cmd->use_sg != 0) { | |
674 | struct scatterlist *cur_seg; | |
675 | struct scatterlist *end_seg; | |
676 | ||
677 | cur_seg = (struct scatterlist *)cmd->request_buffer; | |
678 | end_seg = cur_seg + tot_dsds; | |
679 | while (cur_seg < end_seg) { | |
680 | dma_addr_t sle_dma; | |
681 | cont_a64_entry_t *cont_pkt; | |
682 | ||
683 | /* Allocate additional continuation packets? */ | |
684 | if (avail_dsds == 0) { | |
685 | /* | |
686 | * Five DSDs are available in the Continuation | |
687 | * Type 1 IOCB. | |
688 | */ | |
689 | cont_pkt = qla2x00_prep_cont_type1_iocb(ha); | |
690 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; | |
691 | avail_dsds = 5; | |
692 | } | |
693 | ||
694 | sle_dma = sg_dma_address(cur_seg); | |
695 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
696 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
697 | *cur_dsd++ = cpu_to_le32(sg_dma_len(cur_seg)); | |
698 | avail_dsds--; | |
699 | ||
700 | cur_seg++; | |
701 | } | |
702 | } else { | |
703 | *cur_dsd++ = cpu_to_le32(LSD(sp->dma_handle)); | |
704 | *cur_dsd++ = cpu_to_le32(MSD(sp->dma_handle)); | |
705 | *cur_dsd++ = cpu_to_le32(cmd->request_bufflen); | |
706 | } | |
707 | } | |
708 | ||
709 | ||
710 | /** | |
711 | * qla24xx_start_scsi() - Send a SCSI command to the ISP | |
712 | * @sp: command to send to the ISP | |
713 | * | |
714 | * Returns non-zero if a failure occured, else zero. | |
715 | */ | |
716 | int | |
717 | qla24xx_start_scsi(srb_t *sp) | |
718 | { | |
719 | int ret; | |
720 | unsigned long flags; | |
721 | scsi_qla_host_t *ha; | |
722 | struct scsi_cmnd *cmd; | |
723 | uint32_t *clr_ptr; | |
724 | uint32_t index; | |
725 | uint32_t handle; | |
726 | struct cmd_type_7 *cmd_pkt; | |
727 | struct scatterlist *sg; | |
728 | uint16_t cnt; | |
729 | uint16_t req_cnt; | |
730 | uint16_t tot_dsds; | |
db776a14 | 731 | struct device_reg_24xx __iomem *reg; |
2b6c0cee AV |
732 | |
733 | /* Setup device pointers. */ | |
734 | ret = 0; | |
735 | ha = sp->ha; | |
736 | reg = &ha->iobase->isp24; | |
737 | cmd = sp->cmd; | |
738 | /* So we know we haven't pci_map'ed anything yet */ | |
739 | tot_dsds = 0; | |
740 | ||
741 | /* Send marker if required */ | |
742 | if (ha->marker_needed != 0) { | |
743 | if (qla2x00_marker(ha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) { | |
744 | return QLA_FUNCTION_FAILED; | |
745 | } | |
746 | ha->marker_needed = 0; | |
747 | } | |
748 | ||
749 | /* Acquire ring specific lock */ | |
750 | spin_lock_irqsave(&ha->hardware_lock, flags); | |
751 | ||
752 | /* Check for room in outstanding command list. */ | |
753 | handle = ha->current_outstanding_cmd; | |
754 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { | |
755 | handle++; | |
756 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
757 | handle = 1; | |
758 | if (ha->outstanding_cmds[handle] == 0) | |
759 | break; | |
760 | } | |
761 | if (index == MAX_OUTSTANDING_COMMANDS) | |
762 | goto queuing_error; | |
763 | ||
764 | /* Map the sg table so we have an accurate count of sg entries needed */ | |
765 | if (cmd->use_sg) { | |
766 | sg = (struct scatterlist *) cmd->request_buffer; | |
767 | tot_dsds = pci_map_sg(ha->pdev, sg, cmd->use_sg, | |
768 | cmd->sc_data_direction); | |
769 | if (tot_dsds == 0) | |
770 | goto queuing_error; | |
771 | } else if (cmd->request_bufflen) { | |
772 | dma_addr_t req_dma; | |
773 | ||
774 | req_dma = pci_map_single(ha->pdev, cmd->request_buffer, | |
775 | cmd->request_bufflen, cmd->sc_data_direction); | |
776 | if (dma_mapping_error(req_dma)) | |
777 | goto queuing_error; | |
778 | ||
779 | sp->dma_handle = req_dma; | |
780 | tot_dsds = 1; | |
781 | } | |
782 | ||
783 | req_cnt = qla24xx_calc_iocbs(tot_dsds); | |
784 | if (ha->req_q_cnt < (req_cnt + 2)) { | |
785 | cnt = (uint16_t)RD_REG_DWORD_RELAXED(®->req_q_out); | |
786 | if (ha->req_ring_index < cnt) | |
787 | ha->req_q_cnt = cnt - ha->req_ring_index; | |
788 | else | |
789 | ha->req_q_cnt = ha->request_q_length - | |
790 | (ha->req_ring_index - cnt); | |
791 | } | |
131736d3 | 792 | if (ha->req_q_cnt < (req_cnt + 2)) |
2b6c0cee | 793 | goto queuing_error; |
2b6c0cee AV |
794 | |
795 | /* Build command packet. */ | |
796 | ha->current_outstanding_cmd = handle; | |
797 | ha->outstanding_cmds[handle] = sp; | |
798 | sp->ha = ha; | |
799 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; | |
800 | ha->req_q_cnt -= req_cnt; | |
801 | ||
802 | cmd_pkt = (struct cmd_type_7 *)ha->request_ring_ptr; | |
803 | cmd_pkt->handle = handle; | |
804 | ||
805 | /* Zero out remaining portion of packet. */ | |
72df8325 | 806 | /* tagged queuing modifier -- default is TSK_SIMPLE (0). */ |
2b6c0cee AV |
807 | clr_ptr = (uint32_t *)cmd_pkt + 2; |
808 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
809 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
810 | ||
811 | /* Set NPORT-ID and LUN number*/ | |
812 | cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id); | |
813 | cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa; | |
814 | cmd_pkt->port_id[1] = sp->fcport->d_id.b.area; | |
815 | cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain; | |
816 | ||
661c3f6c | 817 | int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun); |
0d4be124 | 818 | host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun)); |
2b6c0cee | 819 | |
2b6c0cee AV |
820 | /* Load SCSI command packet. */ |
821 | memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len); | |
822 | host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb)); | |
823 | ||
824 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)cmd->request_bufflen); | |
825 | ||
826 | /* Build IOCB segments */ | |
827 | qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds); | |
828 | ||
829 | /* Set total data segment count. */ | |
830 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
831 | wmb(); | |
832 | ||
833 | /* Adjust ring index. */ | |
834 | ha->req_ring_index++; | |
835 | if (ha->req_ring_index == ha->request_q_length) { | |
836 | ha->req_ring_index = 0; | |
837 | ha->request_ring_ptr = ha->request_ring; | |
838 | } else | |
839 | ha->request_ring_ptr++; | |
840 | ||
841 | sp->flags |= SRB_DMA_VALID; | |
2b6c0cee AV |
842 | |
843 | /* Set chip new ring index. */ | |
844 | WRT_REG_DWORD(®->req_q_in, ha->req_ring_index); | |
845 | RD_REG_DWORD_RELAXED(®->req_q_in); /* PCI Posting. */ | |
846 | ||
4fdfefe5 AV |
847 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
848 | if (ha->flags.process_response_queue && | |
849 | ha->response_ring_ptr->signature != RESPONSE_PROCESSED) | |
850 | qla24xx_process_response_queue(ha); | |
851 | ||
2b6c0cee AV |
852 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
853 | return QLA_SUCCESS; | |
854 | ||
855 | queuing_error: | |
856 | if (cmd->use_sg && tot_dsds) { | |
857 | sg = (struct scatterlist *) cmd->request_buffer; | |
858 | pci_unmap_sg(ha->pdev, sg, cmd->use_sg, | |
859 | cmd->sc_data_direction); | |
860 | } else if (tot_dsds) { | |
861 | pci_unmap_single(ha->pdev, sp->dma_handle, | |
862 | cmd->request_bufflen, cmd->sc_data_direction); | |
863 | } | |
864 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
865 | ||
866 | return QLA_FUNCTION_FAILED; | |
1da177e4 | 867 | } |