Commit | Line | Data |
---|---|---|
fa90c54f AV |
1 | /* |
2 | * QLogic Fibre Channel HBA Driver | |
01e58d8e | 3 | * Copyright (c) 2003-2008 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 | ||
e315cd28 AC |
14 | static request_t *qla2x00_req_pkt(scsi_qla_host_t *); |
15 | static void qla2x00_isp_cmd(scsi_qla_host_t *); | |
1da177e4 LT |
16 | |
17 | /** | |
18 | * qla2x00_get_cmd_direction() - Determine control_flag data direction. | |
19 | * @cmd: SCSI command | |
20 | * | |
21 | * Returns the proper CF_* direction based on CDB. | |
22 | */ | |
23 | static inline uint16_t | |
49fd462a | 24 | qla2x00_get_cmd_direction(srb_t *sp) |
1da177e4 LT |
25 | { |
26 | uint16_t cflags; | |
27 | ||
28 | cflags = 0; | |
29 | ||
30 | /* Set transfer direction */ | |
49fd462a | 31 | if (sp->cmd->sc_data_direction == DMA_TO_DEVICE) { |
1da177e4 | 32 | cflags = CF_WRITE; |
e315cd28 | 33 | sp->fcport->vha->hw->qla_stats.output_bytes += |
49fd462a HZ |
34 | scsi_bufflen(sp->cmd); |
35 | } else if (sp->cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
1da177e4 | 36 | cflags = CF_READ; |
e315cd28 | 37 | sp->fcport->vha->hw->qla_stats.input_bytes += |
49fd462a HZ |
38 | scsi_bufflen(sp->cmd); |
39 | } | |
1da177e4 LT |
40 | return (cflags); |
41 | } | |
42 | ||
43 | /** | |
44 | * qla2x00_calc_iocbs_32() - Determine number of Command Type 2 and | |
45 | * Continuation Type 0 IOCBs to allocate. | |
46 | * | |
47 | * @dsds: number of data segment decriptors needed | |
48 | * | |
49 | * Returns the number of IOCB entries needed to store @dsds. | |
50 | */ | |
51 | uint16_t | |
52 | qla2x00_calc_iocbs_32(uint16_t dsds) | |
53 | { | |
54 | uint16_t iocbs; | |
55 | ||
56 | iocbs = 1; | |
57 | if (dsds > 3) { | |
58 | iocbs += (dsds - 3) / 7; | |
59 | if ((dsds - 3) % 7) | |
60 | iocbs++; | |
61 | } | |
62 | return (iocbs); | |
63 | } | |
64 | ||
65 | /** | |
66 | * qla2x00_calc_iocbs_64() - Determine number of Command Type 3 and | |
67 | * Continuation Type 1 IOCBs to allocate. | |
68 | * | |
69 | * @dsds: number of data segment decriptors needed | |
70 | * | |
71 | * Returns the number of IOCB entries needed to store @dsds. | |
72 | */ | |
73 | uint16_t | |
74 | qla2x00_calc_iocbs_64(uint16_t dsds) | |
75 | { | |
76 | uint16_t iocbs; | |
77 | ||
78 | iocbs = 1; | |
79 | if (dsds > 2) { | |
80 | iocbs += (dsds - 2) / 5; | |
81 | if ((dsds - 2) % 5) | |
82 | iocbs++; | |
83 | } | |
84 | return (iocbs); | |
85 | } | |
86 | ||
87 | /** | |
88 | * qla2x00_prep_cont_type0_iocb() - Initialize a Continuation Type 0 IOCB. | |
89 | * @ha: HA context | |
90 | * | |
91 | * Returns a pointer to the Continuation Type 0 IOCB packet. | |
92 | */ | |
93 | static inline cont_entry_t * | |
e315cd28 | 94 | qla2x00_prep_cont_type0_iocb(scsi_qla_host_t *vha) |
1da177e4 LT |
95 | { |
96 | cont_entry_t *cont_pkt; | |
e315cd28 | 97 | struct req_que *req = vha->hw->req; |
1da177e4 | 98 | /* Adjust ring index. */ |
e315cd28 AC |
99 | req->ring_index++; |
100 | if (req->ring_index == req->length) { | |
101 | req->ring_index = 0; | |
102 | req->ring_ptr = req->ring; | |
1da177e4 | 103 | } else { |
e315cd28 | 104 | req->ring_ptr++; |
1da177e4 LT |
105 | } |
106 | ||
e315cd28 | 107 | cont_pkt = (cont_entry_t *)req->ring_ptr; |
1da177e4 LT |
108 | |
109 | /* Load packet defaults. */ | |
110 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
111 | __constant_cpu_to_le32(CONTINUE_TYPE); | |
112 | ||
113 | return (cont_pkt); | |
114 | } | |
115 | ||
116 | /** | |
117 | * qla2x00_prep_cont_type1_iocb() - Initialize a Continuation Type 1 IOCB. | |
118 | * @ha: HA context | |
119 | * | |
120 | * Returns a pointer to the continuation type 1 IOCB packet. | |
121 | */ | |
122 | static inline cont_a64_entry_t * | |
e315cd28 | 123 | qla2x00_prep_cont_type1_iocb(scsi_qla_host_t *vha) |
1da177e4 LT |
124 | { |
125 | cont_a64_entry_t *cont_pkt; | |
e315cd28 | 126 | struct req_que *req = vha->hw->req; |
1da177e4 LT |
127 | |
128 | /* Adjust ring index. */ | |
e315cd28 AC |
129 | req->ring_index++; |
130 | if (req->ring_index == req->length) { | |
131 | req->ring_index = 0; | |
132 | req->ring_ptr = req->ring; | |
1da177e4 | 133 | } else { |
e315cd28 | 134 | req->ring_ptr++; |
1da177e4 LT |
135 | } |
136 | ||
e315cd28 | 137 | cont_pkt = (cont_a64_entry_t *)req->ring_ptr; |
1da177e4 LT |
138 | |
139 | /* Load packet defaults. */ | |
140 | *((uint32_t *)(&cont_pkt->entry_type)) = | |
141 | __constant_cpu_to_le32(CONTINUE_A64_TYPE); | |
142 | ||
143 | return (cont_pkt); | |
144 | } | |
145 | ||
146 | /** | |
147 | * qla2x00_build_scsi_iocbs_32() - Build IOCB command utilizing 32bit | |
148 | * capable IOCB types. | |
149 | * | |
150 | * @sp: SRB command to process | |
151 | * @cmd_pkt: Command type 2 IOCB | |
152 | * @tot_dsds: Total number of segments to transfer | |
153 | */ | |
154 | void qla2x00_build_scsi_iocbs_32(srb_t *sp, cmd_entry_t *cmd_pkt, | |
155 | uint16_t tot_dsds) | |
156 | { | |
157 | uint16_t avail_dsds; | |
158 | uint32_t *cur_dsd; | |
e315cd28 | 159 | scsi_qla_host_t *vha; |
1da177e4 | 160 | struct scsi_cmnd *cmd; |
385d70b4 FT |
161 | struct scatterlist *sg; |
162 | int i; | |
1da177e4 LT |
163 | |
164 | cmd = sp->cmd; | |
165 | ||
166 | /* Update entry type to indicate Command Type 2 IOCB */ | |
167 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
168 | __constant_cpu_to_le32(COMMAND_TYPE); | |
169 | ||
170 | /* No data transfer */ | |
385d70b4 | 171 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
172 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
173 | return; | |
174 | } | |
175 | ||
e315cd28 | 176 | vha = sp->vha; |
1da177e4 | 177 | |
49fd462a | 178 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp)); |
1da177e4 LT |
179 | |
180 | /* Three DSDs are available in the Command Type 2 IOCB */ | |
181 | avail_dsds = 3; | |
182 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
183 | ||
184 | /* Load data segments */ | |
385d70b4 FT |
185 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
186 | cont_entry_t *cont_pkt; | |
187 | ||
188 | /* Allocate additional continuation packets? */ | |
189 | if (avail_dsds == 0) { | |
190 | /* | |
191 | * Seven DSDs are available in the Continuation | |
192 | * Type 0 IOCB. | |
193 | */ | |
e315cd28 | 194 | cont_pkt = qla2x00_prep_cont_type0_iocb(vha); |
385d70b4 FT |
195 | cur_dsd = (uint32_t *)&cont_pkt->dseg_0_address; |
196 | avail_dsds = 7; | |
1da177e4 | 197 | } |
385d70b4 FT |
198 | |
199 | *cur_dsd++ = cpu_to_le32(sg_dma_address(sg)); | |
200 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
201 | avail_dsds--; | |
1da177e4 LT |
202 | } |
203 | } | |
204 | ||
205 | /** | |
206 | * qla2x00_build_scsi_iocbs_64() - Build IOCB command utilizing 64bit | |
207 | * capable IOCB types. | |
208 | * | |
209 | * @sp: SRB command to process | |
210 | * @cmd_pkt: Command type 3 IOCB | |
211 | * @tot_dsds: Total number of segments to transfer | |
212 | */ | |
213 | void qla2x00_build_scsi_iocbs_64(srb_t *sp, cmd_entry_t *cmd_pkt, | |
214 | uint16_t tot_dsds) | |
215 | { | |
216 | uint16_t avail_dsds; | |
217 | uint32_t *cur_dsd; | |
e315cd28 | 218 | scsi_qla_host_t *vha; |
1da177e4 | 219 | struct scsi_cmnd *cmd; |
385d70b4 FT |
220 | struct scatterlist *sg; |
221 | int i; | |
1da177e4 LT |
222 | |
223 | cmd = sp->cmd; | |
224 | ||
225 | /* Update entry type to indicate Command Type 3 IOCB */ | |
226 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
227 | __constant_cpu_to_le32(COMMAND_A64_TYPE); | |
228 | ||
229 | /* No data transfer */ | |
385d70b4 | 230 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
1da177e4 LT |
231 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
232 | return; | |
233 | } | |
234 | ||
e315cd28 | 235 | vha = sp->vha; |
1da177e4 | 236 | |
49fd462a | 237 | cmd_pkt->control_flags |= cpu_to_le16(qla2x00_get_cmd_direction(sp)); |
1da177e4 LT |
238 | |
239 | /* Two DSDs are available in the Command Type 3 IOCB */ | |
240 | avail_dsds = 2; | |
241 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
242 | ||
243 | /* Load data segments */ | |
385d70b4 FT |
244 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { |
245 | dma_addr_t sle_dma; | |
246 | cont_a64_entry_t *cont_pkt; | |
247 | ||
248 | /* Allocate additional continuation packets? */ | |
249 | if (avail_dsds == 0) { | |
250 | /* | |
251 | * Five DSDs are available in the Continuation | |
252 | * Type 1 IOCB. | |
253 | */ | |
e315cd28 | 254 | cont_pkt = qla2x00_prep_cont_type1_iocb(vha); |
385d70b4 FT |
255 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; |
256 | avail_dsds = 5; | |
1da177e4 | 257 | } |
385d70b4 FT |
258 | |
259 | sle_dma = sg_dma_address(sg); | |
260 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
261 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
262 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
263 | avail_dsds--; | |
1da177e4 LT |
264 | } |
265 | } | |
266 | ||
267 | /** | |
268 | * qla2x00_start_scsi() - Send a SCSI command to the ISP | |
269 | * @sp: command to send to the ISP | |
270 | * | |
cc3ef7bc | 271 | * Returns non-zero if a failure occurred, else zero. |
1da177e4 LT |
272 | */ |
273 | int | |
274 | qla2x00_start_scsi(srb_t *sp) | |
275 | { | |
385d70b4 | 276 | int ret, nseg; |
1da177e4 | 277 | unsigned long flags; |
e315cd28 | 278 | scsi_qla_host_t *vha; |
1da177e4 LT |
279 | struct scsi_cmnd *cmd; |
280 | uint32_t *clr_ptr; | |
281 | uint32_t index; | |
282 | uint32_t handle; | |
283 | cmd_entry_t *cmd_pkt; | |
1da177e4 LT |
284 | uint16_t cnt; |
285 | uint16_t req_cnt; | |
286 | uint16_t tot_dsds; | |
3d71644c | 287 | struct device_reg_2xxx __iomem *reg; |
e315cd28 AC |
288 | struct qla_hw_data *ha; |
289 | struct req_que *req; | |
1da177e4 LT |
290 | |
291 | /* Setup device pointers. */ | |
292 | ret = 0; | |
e315cd28 AC |
293 | vha = sp->vha; |
294 | ha = vha->hw; | |
3d71644c | 295 | reg = &ha->iobase->isp; |
1da177e4 | 296 | cmd = sp->cmd; |
e315cd28 | 297 | req = ha->req; |
83021920 | 298 | /* So we know we haven't pci_map'ed anything yet */ |
299 | tot_dsds = 0; | |
1da177e4 LT |
300 | |
301 | /* Send marker if required */ | |
e315cd28 AC |
302 | if (vha->marker_needed != 0) { |
303 | if (qla2x00_marker(vha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) | |
1da177e4 | 304 | return (QLA_FUNCTION_FAILED); |
e315cd28 | 305 | vha->marker_needed = 0; |
1da177e4 LT |
306 | } |
307 | ||
308 | /* Acquire ring specific lock */ | |
c9c5ced9 | 309 | spin_lock_irqsave(&ha->hardware_lock, flags); |
1da177e4 LT |
310 | |
311 | /* Check for room in outstanding command list. */ | |
e315cd28 | 312 | handle = req->current_outstanding_cmd; |
1da177e4 LT |
313 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { |
314 | handle++; | |
315 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
316 | handle = 1; | |
e315cd28 | 317 | if (!req->outstanding_cmds[handle]) |
1da177e4 LT |
318 | break; |
319 | } | |
320 | if (index == MAX_OUTSTANDING_COMMANDS) | |
321 | goto queuing_error; | |
322 | ||
83021920 | 323 | /* Map the sg table so we have an accurate count of sg entries needed */ |
2c3dfe3f SJ |
324 | if (scsi_sg_count(cmd)) { |
325 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
326 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
327 | if (unlikely(!nseg)) | |
328 | goto queuing_error; | |
329 | } else | |
330 | nseg = 0; | |
331 | ||
385d70b4 | 332 | tot_dsds = nseg; |
83021920 | 333 | |
1da177e4 | 334 | /* Calculate the number of request entries needed. */ |
fd34f556 | 335 | req_cnt = ha->isp_ops->calc_req_entries(tot_dsds); |
e315cd28 | 336 | if (req->cnt < (req_cnt + 2)) { |
1da177e4 | 337 | cnt = RD_REG_WORD_RELAXED(ISP_REQ_Q_OUT(ha, reg)); |
e315cd28 AC |
338 | if (req->ring_index < cnt) |
339 | req->cnt = cnt - req->ring_index; | |
1da177e4 | 340 | else |
e315cd28 AC |
341 | req->cnt = req->length - |
342 | (req->ring_index - cnt); | |
1da177e4 | 343 | } |
e315cd28 | 344 | if (req->cnt < (req_cnt + 2)) |
1da177e4 LT |
345 | goto queuing_error; |
346 | ||
1da177e4 | 347 | /* Build command packet */ |
e315cd28 AC |
348 | req->current_outstanding_cmd = handle; |
349 | req->outstanding_cmds[handle] = sp; | |
350 | sp->vha = vha; | |
1da177e4 | 351 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; |
e315cd28 | 352 | req->cnt -= req_cnt; |
1da177e4 | 353 | |
e315cd28 | 354 | cmd_pkt = (cmd_entry_t *)req->ring_ptr; |
1da177e4 LT |
355 | cmd_pkt->handle = handle; |
356 | /* Zero out remaining portion of packet. */ | |
357 | clr_ptr = (uint32_t *)cmd_pkt + 2; | |
358 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
359 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
360 | ||
bdf79621 | 361 | /* Set target ID and LUN number*/ |
362 | SET_TARGET_ID(ha, cmd_pkt->target, sp->fcport->loop_id); | |
363 | cmd_pkt->lun = cpu_to_le16(sp->cmd->device->lun); | |
1da177e4 LT |
364 | |
365 | /* Update tagged queuing modifier */ | |
366 | cmd_pkt->control_flags = __constant_cpu_to_le16(CF_SIMPLE_TAG); | |
1da177e4 | 367 | |
1da177e4 LT |
368 | /* Load SCSI command packet. */ |
369 | memcpy(cmd_pkt->scsi_cdb, cmd->cmnd, cmd->cmd_len); | |
385d70b4 | 370 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
1da177e4 LT |
371 | |
372 | /* Build IOCB segments */ | |
fd34f556 | 373 | ha->isp_ops->build_iocbs(sp, cmd_pkt, tot_dsds); |
1da177e4 LT |
374 | |
375 | /* Set total data segment count. */ | |
376 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
377 | wmb(); | |
378 | ||
379 | /* Adjust ring index. */ | |
e315cd28 AC |
380 | req->ring_index++; |
381 | if (req->ring_index == req->length) { | |
382 | req->ring_index = 0; | |
383 | req->ring_ptr = req->ring; | |
1da177e4 | 384 | } else |
e315cd28 | 385 | req->ring_ptr++; |
1da177e4 | 386 | |
1da177e4 | 387 | sp->flags |= SRB_DMA_VALID; |
1da177e4 LT |
388 | |
389 | /* Set chip new ring index. */ | |
e315cd28 | 390 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, reg), req->ring_index); |
1da177e4 LT |
391 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, reg)); /* PCI Posting. */ |
392 | ||
4fdfefe5 | 393 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
e315cd28 AC |
394 | if (vha->flags.process_response_queue && |
395 | ha->rsp->ring_ptr->signature != RESPONSE_PROCESSED) | |
396 | qla2x00_process_response_queue(vha); | |
4fdfefe5 | 397 | |
c9c5ced9 | 398 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
1da177e4 LT |
399 | return (QLA_SUCCESS); |
400 | ||
401 | queuing_error: | |
385d70b4 FT |
402 | if (tot_dsds) |
403 | scsi_dma_unmap(cmd); | |
404 | ||
c9c5ced9 | 405 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
1da177e4 LT |
406 | |
407 | return (QLA_FUNCTION_FAILED); | |
408 | } | |
409 | ||
410 | /** | |
411 | * qla2x00_marker() - Send a marker IOCB to the firmware. | |
412 | * @ha: HA context | |
413 | * @loop_id: loop ID | |
414 | * @lun: LUN | |
415 | * @type: marker modifier | |
416 | * | |
417 | * Can be called from both normal and interrupt context. | |
418 | * | |
cc3ef7bc | 419 | * Returns non-zero if a failure occurred, else zero. |
1da177e4 | 420 | */ |
fa2a1ce5 | 421 | int |
e315cd28 | 422 | __qla2x00_marker(scsi_qla_host_t *vha, uint16_t loop_id, uint16_t lun, |
1da177e4 LT |
423 | uint8_t type) |
424 | { | |
2b6c0cee AV |
425 | mrk_entry_t *mrk; |
426 | struct mrk_entry_24xx *mrk24; | |
e315cd28 AC |
427 | struct qla_hw_data *ha = vha->hw; |
428 | scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev); | |
1da177e4 | 429 | |
2b6c0cee | 430 | mrk24 = NULL; |
e315cd28 | 431 | mrk = (mrk_entry_t *)qla2x00_req_pkt(base_vha); |
2b6c0cee AV |
432 | if (mrk == NULL) { |
433 | DEBUG2_3(printk("%s(%ld): failed to allocate Marker IOCB.\n", | |
e315cd28 | 434 | __func__, base_vha->host_no)); |
1da177e4 LT |
435 | |
436 | return (QLA_FUNCTION_FAILED); | |
437 | } | |
438 | ||
2b6c0cee AV |
439 | mrk->entry_type = MARKER_TYPE; |
440 | mrk->modifier = type; | |
1da177e4 | 441 | if (type != MK_SYNC_ALL) { |
e428924c | 442 | if (IS_FWI2_CAPABLE(ha)) { |
2b6c0cee AV |
443 | mrk24 = (struct mrk_entry_24xx *) mrk; |
444 | mrk24->nport_handle = cpu_to_le16(loop_id); | |
445 | mrk24->lun[1] = LSB(lun); | |
446 | mrk24->lun[2] = MSB(lun); | |
b797b6de | 447 | host_to_fcp_swap(mrk24->lun, sizeof(mrk24->lun)); |
e315cd28 | 448 | mrk24->vp_index = vha->vp_idx; |
2b6c0cee AV |
449 | } else { |
450 | SET_TARGET_ID(ha, mrk->target, loop_id); | |
451 | mrk->lun = cpu_to_le16(lun); | |
452 | } | |
1da177e4 LT |
453 | } |
454 | wmb(); | |
455 | ||
e315cd28 | 456 | qla2x00_isp_cmd(base_vha); |
1da177e4 LT |
457 | |
458 | return (QLA_SUCCESS); | |
459 | } | |
460 | ||
fa2a1ce5 | 461 | int |
e315cd28 | 462 | qla2x00_marker(scsi_qla_host_t *vha, uint16_t loop_id, uint16_t lun, |
1da177e4 LT |
463 | uint8_t type) |
464 | { | |
465 | int ret; | |
466 | unsigned long flags = 0; | |
e315cd28 | 467 | struct qla_hw_data *ha = vha->hw; |
1da177e4 | 468 | |
e315cd28 AC |
469 | spin_lock_irqsave(&ha->hardware_lock, flags); |
470 | ret = __qla2x00_marker(vha, loop_id, lun, type); | |
471 | spin_unlock_irqrestore(&ha->hardware_lock, flags); | |
1da177e4 LT |
472 | |
473 | return (ret); | |
474 | } | |
475 | ||
476 | /** | |
477 | * qla2x00_req_pkt() - Retrieve a request packet from the request ring. | |
478 | * @ha: HA context | |
479 | * | |
480 | * Note: The caller must hold the hardware lock before calling this routine. | |
481 | * | |
482 | * Returns NULL if function failed, else, a pointer to the request packet. | |
483 | */ | |
484 | static request_t * | |
e315cd28 | 485 | qla2x00_req_pkt(scsi_qla_host_t *vha) |
1da177e4 | 486 | { |
e315cd28 | 487 | struct qla_hw_data *ha = vha->hw; |
2b6c0cee | 488 | device_reg_t __iomem *reg = ha->iobase; |
1da177e4 LT |
489 | request_t *pkt = NULL; |
490 | uint16_t cnt; | |
491 | uint32_t *dword_ptr; | |
492 | uint32_t timer; | |
493 | uint16_t req_cnt = 1; | |
e315cd28 | 494 | struct req_que *req = ha->req; |
1da177e4 LT |
495 | |
496 | /* Wait 1 second for slot. */ | |
497 | for (timer = HZ; timer; timer--) { | |
e315cd28 | 498 | if ((req_cnt + 2) >= req->cnt) { |
1da177e4 | 499 | /* Calculate number of free request entries. */ |
e428924c | 500 | if (IS_FWI2_CAPABLE(ha)) |
2b6c0cee AV |
501 | cnt = (uint16_t)RD_REG_DWORD( |
502 | ®->isp24.req_q_out); | |
503 | else | |
504 | cnt = qla2x00_debounce_register( | |
505 | ISP_REQ_Q_OUT(ha, ®->isp)); | |
e315cd28 AC |
506 | if (req->ring_index < cnt) |
507 | req->cnt = cnt - req->ring_index; | |
1da177e4 | 508 | else |
e315cd28 AC |
509 | req->cnt = req->length - |
510 | (req->ring_index - cnt); | |
1da177e4 LT |
511 | } |
512 | /* If room for request in request ring. */ | |
e315cd28 AC |
513 | if ((req_cnt + 2) < req->cnt) { |
514 | req->cnt--; | |
515 | pkt = req->ring_ptr; | |
1da177e4 LT |
516 | |
517 | /* Zero out packet. */ | |
518 | dword_ptr = (uint32_t *)pkt; | |
519 | for (cnt = 0; cnt < REQUEST_ENTRY_SIZE / 4; cnt++) | |
520 | *dword_ptr++ = 0; | |
521 | ||
522 | /* Set system defined field. */ | |
e315cd28 | 523 | pkt->sys_define = (uint8_t)req->ring_index; |
1da177e4 LT |
524 | |
525 | /* Set entry count. */ | |
526 | pkt->entry_count = 1; | |
527 | ||
528 | break; | |
529 | } | |
530 | ||
531 | /* Release ring specific lock */ | |
e315cd28 | 532 | spin_unlock_irq(&ha->hardware_lock); |
1da177e4 LT |
533 | |
534 | udelay(2); /* 2 us */ | |
535 | ||
536 | /* Check for pending interrupts. */ | |
537 | /* During init we issue marker directly */ | |
e315cd28 AC |
538 | if (!vha->marker_needed && !vha->flags.init_done) |
539 | qla2x00_poll(ha->rsp); | |
1da177e4 LT |
540 | spin_lock_irq(&ha->hardware_lock); |
541 | } | |
542 | if (!pkt) { | |
543 | DEBUG2_3(printk("%s(): **** FAILED ****\n", __func__)); | |
544 | } | |
545 | ||
546 | return (pkt); | |
547 | } | |
548 | ||
549 | /** | |
550 | * qla2x00_isp_cmd() - Modify the request ring pointer. | |
551 | * @ha: HA context | |
552 | * | |
553 | * Note: The caller must hold the hardware lock before calling this routine. | |
554 | */ | |
413975a0 | 555 | static void |
e315cd28 | 556 | qla2x00_isp_cmd(scsi_qla_host_t *vha) |
1da177e4 | 557 | { |
e315cd28 | 558 | struct qla_hw_data *ha = vha->hw; |
2b6c0cee | 559 | device_reg_t __iomem *reg = ha->iobase; |
e315cd28 | 560 | struct req_que *req = ha->req; |
1da177e4 LT |
561 | |
562 | DEBUG5(printk("%s(): IOCB data:\n", __func__)); | |
563 | DEBUG5(qla2x00_dump_buffer( | |
e315cd28 | 564 | (uint8_t *)req->ring_ptr, REQUEST_ENTRY_SIZE)); |
1da177e4 LT |
565 | |
566 | /* Adjust ring index. */ | |
e315cd28 AC |
567 | req->ring_index++; |
568 | if (req->ring_index == req->length) { | |
569 | req->ring_index = 0; | |
570 | req->ring_ptr = req->ring; | |
1da177e4 | 571 | } else |
e315cd28 | 572 | req->ring_ptr++; |
1da177e4 LT |
573 | |
574 | /* Set chip new ring index. */ | |
e428924c | 575 | if (IS_FWI2_CAPABLE(ha)) { |
e315cd28 | 576 | WRT_REG_DWORD(®->isp24.req_q_in, req->ring_index); |
2b6c0cee AV |
577 | RD_REG_DWORD_RELAXED(®->isp24.req_q_in); |
578 | } else { | |
e315cd28 | 579 | WRT_REG_WORD(ISP_REQ_Q_IN(ha, ®->isp), req->ring_index); |
2b6c0cee AV |
580 | RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, ®->isp)); |
581 | } | |
582 | ||
583 | } | |
584 | ||
585 | /** | |
586 | * qla24xx_calc_iocbs() - Determine number of Command Type 3 and | |
587 | * Continuation Type 1 IOCBs to allocate. | |
588 | * | |
589 | * @dsds: number of data segment decriptors needed | |
590 | * | |
591 | * Returns the number of IOCB entries needed to store @dsds. | |
592 | */ | |
593 | static inline uint16_t | |
594 | qla24xx_calc_iocbs(uint16_t dsds) | |
595 | { | |
596 | uint16_t iocbs; | |
597 | ||
598 | iocbs = 1; | |
599 | if (dsds > 1) { | |
600 | iocbs += (dsds - 1) / 5; | |
601 | if ((dsds - 1) % 5) | |
602 | iocbs++; | |
603 | } | |
604 | return iocbs; | |
605 | } | |
606 | ||
607 | /** | |
608 | * qla24xx_build_scsi_iocbs() - Build IOCB command utilizing Command Type 7 | |
609 | * IOCB types. | |
610 | * | |
611 | * @sp: SRB command to process | |
612 | * @cmd_pkt: Command type 3 IOCB | |
613 | * @tot_dsds: Total number of segments to transfer | |
614 | */ | |
615 | static inline void | |
616 | qla24xx_build_scsi_iocbs(srb_t *sp, struct cmd_type_7 *cmd_pkt, | |
617 | uint16_t tot_dsds) | |
618 | { | |
619 | uint16_t avail_dsds; | |
620 | uint32_t *cur_dsd; | |
e315cd28 | 621 | scsi_qla_host_t *vha; |
2b6c0cee | 622 | struct scsi_cmnd *cmd; |
385d70b4 FT |
623 | struct scatterlist *sg; |
624 | int i; | |
2b6c0cee AV |
625 | |
626 | cmd = sp->cmd; | |
627 | ||
628 | /* Update entry type to indicate Command Type 3 IOCB */ | |
629 | *((uint32_t *)(&cmd_pkt->entry_type)) = | |
630 | __constant_cpu_to_le32(COMMAND_TYPE_7); | |
631 | ||
632 | /* No data transfer */ | |
385d70b4 | 633 | if (!scsi_bufflen(cmd) || cmd->sc_data_direction == DMA_NONE) { |
2b6c0cee AV |
634 | cmd_pkt->byte_count = __constant_cpu_to_le32(0); |
635 | return; | |
636 | } | |
637 | ||
e315cd28 | 638 | vha = sp->vha; |
2b6c0cee AV |
639 | |
640 | /* Set transfer direction */ | |
49fd462a | 641 | if (cmd->sc_data_direction == DMA_TO_DEVICE) { |
2b6c0cee AV |
642 | cmd_pkt->task_mgmt_flags = |
643 | __constant_cpu_to_le16(TMF_WRITE_DATA); | |
e315cd28 | 644 | sp->fcport->vha->hw->qla_stats.output_bytes += |
49fd462a HZ |
645 | scsi_bufflen(sp->cmd); |
646 | } else if (cmd->sc_data_direction == DMA_FROM_DEVICE) { | |
2b6c0cee AV |
647 | cmd_pkt->task_mgmt_flags = |
648 | __constant_cpu_to_le16(TMF_READ_DATA); | |
e315cd28 | 649 | sp->fcport->vha->hw->qla_stats.input_bytes += |
49fd462a HZ |
650 | scsi_bufflen(sp->cmd); |
651 | } | |
2b6c0cee AV |
652 | |
653 | /* One DSD is available in the Command Type 3 IOCB */ | |
654 | avail_dsds = 1; | |
655 | cur_dsd = (uint32_t *)&cmd_pkt->dseg_0_address; | |
656 | ||
657 | /* Load data segments */ | |
385d70b4 FT |
658 | |
659 | scsi_for_each_sg(cmd, sg, tot_dsds, i) { | |
660 | dma_addr_t sle_dma; | |
661 | cont_a64_entry_t *cont_pkt; | |
662 | ||
663 | /* Allocate additional continuation packets? */ | |
664 | if (avail_dsds == 0) { | |
665 | /* | |
666 | * Five DSDs are available in the Continuation | |
667 | * Type 1 IOCB. | |
668 | */ | |
e315cd28 | 669 | cont_pkt = qla2x00_prep_cont_type1_iocb(vha); |
385d70b4 FT |
670 | cur_dsd = (uint32_t *)cont_pkt->dseg_0_address; |
671 | avail_dsds = 5; | |
2b6c0cee | 672 | } |
385d70b4 FT |
673 | |
674 | sle_dma = sg_dma_address(sg); | |
675 | *cur_dsd++ = cpu_to_le32(LSD(sle_dma)); | |
676 | *cur_dsd++ = cpu_to_le32(MSD(sle_dma)); | |
677 | *cur_dsd++ = cpu_to_le32(sg_dma_len(sg)); | |
678 | avail_dsds--; | |
2b6c0cee AV |
679 | } |
680 | } | |
681 | ||
682 | ||
683 | /** | |
684 | * qla24xx_start_scsi() - Send a SCSI command to the ISP | |
685 | * @sp: command to send to the ISP | |
686 | * | |
cc3ef7bc | 687 | * Returns non-zero if a failure occurred, else zero. |
2b6c0cee AV |
688 | */ |
689 | int | |
690 | qla24xx_start_scsi(srb_t *sp) | |
691 | { | |
385d70b4 | 692 | int ret, nseg; |
2b6c0cee | 693 | unsigned long flags; |
e315cd28 | 694 | scsi_qla_host_t *vha; |
2b6c0cee AV |
695 | struct scsi_cmnd *cmd; |
696 | uint32_t *clr_ptr; | |
697 | uint32_t index; | |
698 | uint32_t handle; | |
699 | struct cmd_type_7 *cmd_pkt; | |
2b6c0cee AV |
700 | uint16_t cnt; |
701 | uint16_t req_cnt; | |
702 | uint16_t tot_dsds; | |
db776a14 | 703 | struct device_reg_24xx __iomem *reg; |
e315cd28 AC |
704 | struct qla_hw_data *ha; |
705 | struct req_que *req; | |
2b6c0cee AV |
706 | |
707 | /* Setup device pointers. */ | |
708 | ret = 0; | |
e315cd28 AC |
709 | vha = sp->vha; |
710 | ha = vha->hw; | |
2b6c0cee AV |
711 | reg = &ha->iobase->isp24; |
712 | cmd = sp->cmd; | |
e315cd28 | 713 | req = ha->req; |
2b6c0cee AV |
714 | /* So we know we haven't pci_map'ed anything yet */ |
715 | tot_dsds = 0; | |
716 | ||
717 | /* Send marker if required */ | |
e315cd28 AC |
718 | if (vha->marker_needed != 0) { |
719 | if (qla2x00_marker(vha, 0, 0, MK_SYNC_ALL) != QLA_SUCCESS) | |
2b6c0cee | 720 | return QLA_FUNCTION_FAILED; |
e315cd28 | 721 | vha->marker_needed = 0; |
2b6c0cee AV |
722 | } |
723 | ||
724 | /* Acquire ring specific lock */ | |
e315cd28 | 725 | spin_lock_irqsave(&ha->hardware_lock, flags); |
2b6c0cee AV |
726 | |
727 | /* Check for room in outstanding command list. */ | |
e315cd28 | 728 | handle = req->current_outstanding_cmd; |
2b6c0cee AV |
729 | for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) { |
730 | handle++; | |
731 | if (handle == MAX_OUTSTANDING_COMMANDS) | |
732 | handle = 1; | |
e315cd28 | 733 | if (!req->outstanding_cmds[handle]) |
2b6c0cee AV |
734 | break; |
735 | } | |
736 | if (index == MAX_OUTSTANDING_COMMANDS) | |
737 | goto queuing_error; | |
738 | ||
739 | /* Map the sg table so we have an accurate count of sg entries needed */ | |
2c3dfe3f SJ |
740 | if (scsi_sg_count(cmd)) { |
741 | nseg = dma_map_sg(&ha->pdev->dev, scsi_sglist(cmd), | |
742 | scsi_sg_count(cmd), cmd->sc_data_direction); | |
743 | if (unlikely(!nseg)) | |
2b6c0cee | 744 | goto queuing_error; |
2c3dfe3f SJ |
745 | } else |
746 | nseg = 0; | |
747 | ||
385d70b4 | 748 | tot_dsds = nseg; |
2b6c0cee AV |
749 | |
750 | req_cnt = qla24xx_calc_iocbs(tot_dsds); | |
e315cd28 | 751 | if (req->cnt < (req_cnt + 2)) { |
2b6c0cee | 752 | cnt = (uint16_t)RD_REG_DWORD_RELAXED(®->req_q_out); |
e315cd28 AC |
753 | if (req->ring_index < cnt) |
754 | req->cnt = cnt - req->ring_index; | |
2b6c0cee | 755 | else |
e315cd28 AC |
756 | req->cnt = req->length - |
757 | (req->ring_index - cnt); | |
2b6c0cee | 758 | } |
e315cd28 | 759 | if (req->cnt < (req_cnt + 2)) |
2b6c0cee | 760 | goto queuing_error; |
2b6c0cee AV |
761 | |
762 | /* Build command packet. */ | |
e315cd28 AC |
763 | req->current_outstanding_cmd = handle; |
764 | req->outstanding_cmds[handle] = sp; | |
765 | sp->vha = vha; | |
2b6c0cee | 766 | sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle; |
e315cd28 | 767 | req->cnt -= req_cnt; |
2b6c0cee | 768 | |
e315cd28 | 769 | cmd_pkt = (struct cmd_type_7 *)req->ring_ptr; |
2b6c0cee AV |
770 | cmd_pkt->handle = handle; |
771 | ||
772 | /* Zero out remaining portion of packet. */ | |
72df8325 | 773 | /* tagged queuing modifier -- default is TSK_SIMPLE (0). */ |
2b6c0cee AV |
774 | clr_ptr = (uint32_t *)cmd_pkt + 2; |
775 | memset(clr_ptr, 0, REQUEST_ENTRY_SIZE - 8); | |
776 | cmd_pkt->dseg_count = cpu_to_le16(tot_dsds); | |
777 | ||
778 | /* Set NPORT-ID and LUN number*/ | |
779 | cmd_pkt->nport_handle = cpu_to_le16(sp->fcport->loop_id); | |
780 | cmd_pkt->port_id[0] = sp->fcport->d_id.b.al_pa; | |
781 | cmd_pkt->port_id[1] = sp->fcport->d_id.b.area; | |
782 | cmd_pkt->port_id[2] = sp->fcport->d_id.b.domain; | |
2c3dfe3f | 783 | cmd_pkt->vp_index = sp->fcport->vp_idx; |
2b6c0cee | 784 | |
661c3f6c | 785 | int_to_scsilun(sp->cmd->device->lun, &cmd_pkt->lun); |
0d4be124 | 786 | host_to_fcp_swap((uint8_t *)&cmd_pkt->lun, sizeof(cmd_pkt->lun)); |
2b6c0cee | 787 | |
2b6c0cee AV |
788 | /* Load SCSI command packet. */ |
789 | memcpy(cmd_pkt->fcp_cdb, cmd->cmnd, cmd->cmd_len); | |
790 | host_to_fcp_swap(cmd_pkt->fcp_cdb, sizeof(cmd_pkt->fcp_cdb)); | |
791 | ||
385d70b4 | 792 | cmd_pkt->byte_count = cpu_to_le32((uint32_t)scsi_bufflen(cmd)); |
2b6c0cee AV |
793 | |
794 | /* Build IOCB segments */ | |
795 | qla24xx_build_scsi_iocbs(sp, cmd_pkt, tot_dsds); | |
796 | ||
797 | /* Set total data segment count. */ | |
798 | cmd_pkt->entry_count = (uint8_t)req_cnt; | |
799 | wmb(); | |
800 | ||
801 | /* Adjust ring index. */ | |
e315cd28 AC |
802 | req->ring_index++; |
803 | if (req->ring_index == req->length) { | |
804 | req->ring_index = 0; | |
805 | req->ring_ptr = req->ring; | |
2b6c0cee | 806 | } else |
e315cd28 | 807 | req->ring_ptr++; |
2b6c0cee AV |
808 | |
809 | sp->flags |= SRB_DMA_VALID; | |
2b6c0cee AV |
810 | |
811 | /* Set chip new ring index. */ | |
e315cd28 | 812 | WRT_REG_DWORD(®->req_q_in, req->ring_index); |
2b6c0cee AV |
813 | RD_REG_DWORD_RELAXED(®->req_q_in); /* PCI Posting. */ |
814 | ||
4fdfefe5 | 815 | /* Manage unprocessed RIO/ZIO commands in response queue. */ |
e315cd28 AC |
816 | if (vha->flags.process_response_queue && |
817 | ha->rsp->ring_ptr->signature != RESPONSE_PROCESSED) | |
818 | qla24xx_process_response_queue(vha); | |
4fdfefe5 | 819 | |
e315cd28 | 820 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
2b6c0cee AV |
821 | return QLA_SUCCESS; |
822 | ||
823 | queuing_error: | |
385d70b4 FT |
824 | if (tot_dsds) |
825 | scsi_dma_unmap(cmd); | |
826 | ||
e315cd28 | 827 | spin_unlock_irqrestore(&ha->hardware_lock, flags); |
2b6c0cee AV |
828 | |
829 | return QLA_FUNCTION_FAILED; | |
1da177e4 | 830 | } |