1 // SPDX-License-Identifier: GPL-2.0-only
3 * Aic94xx SAS/SATA Tasks
5 * Copyright (C) 2005 Adaptec, Inc. All rights reserved.
6 * Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
9 #include <linux/spinlock.h>
11 #include "aic94xx_sas.h"
12 #include "aic94xx_hwi.h"
14 static void asd_unbuild_ata_ascb(struct asd_ascb *a);
15 static void asd_unbuild_smp_ascb(struct asd_ascb *a);
16 static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
18 static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num)
22 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
23 asd_ha->seq.can_queue += num;
24 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
27 /* DMA_... to our direction translation.
29 static const u8 data_dir_flags[] = {
30 [DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */
31 [DMA_TO_DEVICE] = DATA_DIR_OUT, /* OUTBOUND */
32 [DMA_FROM_DEVICE] = DATA_DIR_IN, /* INBOUND */
33 [DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */
36 static int asd_map_scatterlist(struct sas_task *task,
40 struct asd_ascb *ascb = task->lldd_task;
41 struct asd_ha_struct *asd_ha = ascb->ha;
42 struct scatterlist *sc;
45 if (task->data_dir == DMA_NONE)
48 if (task->num_scatter == 0) {
49 void *p = task->scatter;
50 dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p,
53 sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
54 sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
55 sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
59 /* STP tasks come from libata which has already mapped
61 if (sas_protocol_ata(task->task_proto))
62 num_sg = task->num_scatter;
64 num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter,
65 task->num_scatter, task->data_dir);
72 ascb->sg_arr = asd_alloc_coherent(asd_ha,
73 num_sg*sizeof(struct sg_el),
79 for_each_sg(task->scatter, sc, num_sg, i) {
81 &((struct sg_el *)ascb->sg_arr->vaddr)[i];
82 sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
83 sg->size = cpu_to_le32((u32)sg_dma_len(sc));
85 sg->flags |= ASD_SG_EL_LIST_EOL;
88 for_each_sg(task->scatter, sc, 2, i) {
90 cpu_to_le64((u64)sg_dma_address(sc));
91 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
93 sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
94 sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
96 memset(&sg_arr[2], 0, sizeof(*sg_arr));
97 sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
100 for_each_sg(task->scatter, sc, num_sg, i) {
102 cpu_to_le64((u64)sg_dma_address(sc));
103 sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
105 sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
110 if (sas_protocol_ata(task->task_proto))
111 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
112 task->num_scatter, task->data_dir);
116 static void asd_unmap_scatterlist(struct asd_ascb *ascb)
118 struct asd_ha_struct *asd_ha = ascb->ha;
119 struct sas_task *task = ascb->uldd_task;
121 if (task->data_dir == DMA_NONE)
124 if (task->num_scatter == 0) {
125 dma_addr_t dma = (dma_addr_t)
126 le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
127 dma_unmap_single(&ascb->ha->pcidev->dev, dma,
128 task->total_xfer_len, task->data_dir);
132 asd_free_coherent(asd_ha, ascb->sg_arr);
133 if (task->task_proto != SAS_PROTOCOL_STP)
134 dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
135 task->num_scatter, task->data_dir);
138 /* ---------- Task complete tasklet ---------- */
140 static void asd_get_response_tasklet(struct asd_ascb *ascb,
141 struct done_list_struct *dl)
143 struct asd_ha_struct *asd_ha = ascb->ha;
144 struct sas_task *task = ascb->uldd_task;
145 struct task_status_struct *ts = &task->task_status;
147 struct tc_resp_sb_struct {
151 } __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
153 /* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
154 int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
155 struct asd_ascb *escb;
156 struct asd_dma_tok *edb;
159 spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
160 escb = asd_tc_index_find(&asd_ha->seq,
161 (int)le16_to_cpu(resp_sb->index_escb));
162 spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
165 ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
169 ts->buf_valid_size = 0;
170 edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
172 if (task->task_proto == SAS_PROTOCOL_SSP) {
173 struct ssp_response_iu *iu =
174 r + 16 + sizeof(struct ssp_frame_hdr);
176 ts->residual = le32_to_cpu(*(__le32 *)r);
178 sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
180 struct ata_task_resp *resp = (void *) &ts->buf[0];
182 ts->residual = le32_to_cpu(*(__le32 *)r);
184 if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
185 resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
186 memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
187 ts->buf_valid_size = sizeof(*resp);
191 asd_invalidate_edb(escb, edb_id);
194 static void asd_task_tasklet_complete(struct asd_ascb *ascb,
195 struct done_list_struct *dl)
197 struct sas_task *task = ascb->uldd_task;
198 struct task_status_struct *ts = &task->task_status;
200 u8 opcode = dl->opcode;
202 asd_can_dequeue(ascb->ha, 1);
207 ts->resp = SAS_TASK_COMPLETE;
208 ts->stat = SAM_STAT_GOOD;
211 ts->resp = SAS_TASK_COMPLETE;
212 ts->stat = SAS_DATA_UNDERRUN;
213 ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
216 ts->resp = SAS_TASK_COMPLETE;
217 ts->stat = SAS_DATA_OVERRUN;
222 ts->resp = SAS_TASK_COMPLETE;
223 ts->stat = SAS_PROTO_RESPONSE;
224 asd_get_response_tasklet(ascb, dl);
227 ts->resp = SAS_TASK_UNDELIVERED;
228 ts->stat = SAS_OPEN_REJECT;
229 if (dl->status_block[1] & 2)
230 ts->open_rej_reason = 1 + dl->status_block[2];
231 else if (dl->status_block[1] & 1)
232 ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
234 ts->open_rej_reason = SAS_OREJ_UNKNOWN;
237 ts->resp = SAS_TASK_UNDELIVERED;
238 ts->stat = SAS_OPEN_TO;
242 ts->resp = SAS_TASK_UNDELIVERED;
243 ts->stat = SAS_PHY_DOWN;
246 ts->resp = SAS_TASK_COMPLETE;
247 ts->stat = SAS_PHY_DOWN;
253 case TF_SMP_XMIT_RCV_ERR:
254 case TC_ATA_R_ERR_RECV:
255 ts->resp = SAS_TASK_COMPLETE;
256 ts->stat = SAS_INTERRUPTED;
262 ts->resp = SAS_TASK_UNDELIVERED;
263 ts->stat = SAS_DEV_NO_RESPONSE;
266 ts->resp = SAS_TASK_COMPLETE;
267 ts->stat = SAS_NAK_R_ERR;
269 case TA_I_T_NEXUS_LOSS:
270 opcode = dl->status_block[0];
273 case TF_INV_CONN_HANDLE:
274 ts->resp = SAS_TASK_UNDELIVERED;
275 ts->stat = SAS_DEVICE_UNKNOWN;
277 case TF_REQUESTED_N_PENDING:
278 ts->resp = SAS_TASK_UNDELIVERED;
279 ts->stat = SAS_PENDING;
281 case TC_TASK_CLEARED:
283 ts->resp = SAS_TASK_COMPLETE;
284 ts->stat = SAS_ABORTED_TASK;
290 case TF_TMF_TAG_FREE:
291 case TF_TMF_TASK_DONE:
292 case TF_TMF_NO_CONN_HANDLE:
295 case TF_DATA_OFFS_ERR:
296 ts->resp = SAS_TASK_UNDELIVERED;
297 ts->stat = SAS_DEV_NO_RESPONSE;
300 case TC_LINK_ADM_RESP:
303 case TC_PARTIAL_SG_LIST:
305 ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
309 switch (task->task_proto) {
310 case SAS_PROTOCOL_SATA:
311 case SAS_PROTOCOL_STP:
312 asd_unbuild_ata_ascb(ascb);
314 case SAS_PROTOCOL_SMP:
315 asd_unbuild_smp_ascb(ascb);
317 case SAS_PROTOCOL_SSP:
318 asd_unbuild_ssp_ascb(ascb);
323 spin_lock_irqsave(&task->task_state_lock, flags);
324 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
325 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
326 task->task_state_flags |= SAS_TASK_STATE_DONE;
327 if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
328 struct completion *completion = ascb->completion;
329 spin_unlock_irqrestore(&task->task_state_lock, flags);
330 ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
331 "stat 0x%x but aborted by upper layer!\n",
332 task, opcode, ts->resp, ts->stat);
334 complete(completion);
336 spin_unlock_irqrestore(&task->task_state_lock, flags);
337 task->lldd_task = NULL;
340 task->task_done(task);
344 /* ---------- ATA ---------- */
346 static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
349 struct domain_device *dev = task->dev;
356 if (unlikely(task->ata_task.device_control_reg_update))
357 scb->header.opcode = CONTROL_ATA_DEV;
358 else if (dev->sata_dev.class == ATA_DEV_ATAPI)
359 scb->header.opcode = INITIATE_ATAPI_TASK;
361 scb->header.opcode = INITIATE_ATA_TASK;
363 scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
364 if (dev->port->oob_mode == SAS_OOB_MODE)
365 scb->ata_task.proto_conn_rate |= dev->linkrate;
367 scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
368 scb->ata_task.fis = task->ata_task.fis;
369 if (likely(!task->ata_task.device_control_reg_update))
370 scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
371 scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
372 if (dev->sata_dev.class == ATA_DEV_ATAPI)
373 memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
375 scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
376 scb->ata_task.conn_handle = cpu_to_le16(
377 (u16)(unsigned long)dev->lldd_dev);
379 if (likely(!task->ata_task.device_control_reg_update)) {
381 if (task->ata_task.dma_xfer)
382 flags |= DATA_XFER_MODE_DMA;
383 if (task->ata_task.use_ncq &&
384 dev->sata_dev.class != ATA_DEV_ATAPI)
385 flags |= ATA_Q_TYPE_NCQ;
386 flags |= data_dir_flags[task->data_dir];
387 scb->ata_task.ata_flags = flags;
389 scb->ata_task.retry_count = task->ata_task.retry_count;
392 if (task->ata_task.set_affil_pol)
393 flags |= SET_AFFIL_POLICY;
394 if (task->ata_task.stp_affil_pol)
395 flags |= STP_AFFIL_POLICY;
396 scb->ata_task.flags = flags;
398 ascb->tasklet_complete = asd_task_tasklet_complete;
400 if (likely(!task->ata_task.device_control_reg_update))
401 res = asd_map_scatterlist(task, scb->ata_task.sg_element,
407 static void asd_unbuild_ata_ascb(struct asd_ascb *a)
409 asd_unmap_scatterlist(a);
412 /* ---------- SMP ---------- */
414 static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
417 struct asd_ha_struct *asd_ha = ascb->ha;
418 struct domain_device *dev = task->dev;
421 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
423 dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
428 scb->header.opcode = INITIATE_SMP_TASK;
430 scb->smp_task.proto_conn_rate = dev->linkrate;
432 scb->smp_task.smp_req.bus_addr =
433 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
434 scb->smp_task.smp_req.size =
435 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
437 scb->smp_task.smp_resp.bus_addr =
438 cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
439 scb->smp_task.smp_resp.size =
440 cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
442 scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
443 scb->smp_task.conn_handle = cpu_to_le16((u16)
444 (unsigned long)dev->lldd_dev);
446 ascb->tasklet_complete = asd_task_tasklet_complete;
451 static void asd_unbuild_smp_ascb(struct asd_ascb *a)
453 struct sas_task *task = a->uldd_task;
456 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
458 dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
462 /* ---------- SSP ---------- */
464 static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
467 struct domain_device *dev = task->dev;
473 scb->header.opcode = INITIATE_SSP_TASK;
475 scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
476 scb->ssp_task.proto_conn_rate |= dev->linkrate;
477 scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
478 scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
479 memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
480 HASHED_SAS_ADDR_SIZE);
481 memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
482 dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
483 scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
485 memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
486 if (task->ssp_task.enable_first_burst)
487 scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
488 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
489 scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
490 memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
491 task->ssp_task.cmd->cmd_len);
493 scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
494 scb->ssp_task.conn_handle = cpu_to_le16(
495 (u16)(unsigned long)dev->lldd_dev);
496 scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
497 scb->ssp_task.retry_count = scb->ssp_task.retry_count;
499 ascb->tasklet_complete = asd_task_tasklet_complete;
501 res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
506 static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
508 asd_unmap_scatterlist(a);
511 /* ---------- Execute Task ---------- */
513 static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
518 spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
519 if ((asd_ha->seq.can_queue - num) < 0)
520 res = -SAS_QUEUE_FULL;
522 asd_ha->seq.can_queue -= num;
523 spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
528 int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
532 struct sas_task *t = task;
533 struct asd_ascb *ascb = NULL, *a;
534 struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
537 res = asd_can_queue(asd_ha, 1);
542 ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
548 __list_add(&alist, ascb->list.prev, &ascb->list);
549 list_for_each_entry(a, &alist, list) {
554 list_for_each_entry(a, &alist, list) {
557 if (t->task_proto & SAS_PROTOCOL_STP)
558 t->task_proto = SAS_PROTOCOL_STP;
559 switch (t->task_proto) {
560 case SAS_PROTOCOL_SATA:
561 case SAS_PROTOCOL_STP:
562 res = asd_build_ata_ascb(a, t, gfp_flags);
564 case SAS_PROTOCOL_SMP:
565 res = asd_build_smp_ascb(a, t, gfp_flags);
567 case SAS_PROTOCOL_SSP:
568 res = asd_build_ssp_ascb(a, t, gfp_flags);
571 asd_printk("unknown sas_task proto: 0x%x\n",
579 spin_lock_irqsave(&t->task_state_lock, flags);
580 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
581 spin_unlock_irqrestore(&t->task_state_lock, flags);
583 list_del_init(&alist);
585 res = asd_post_ascb_list(asd_ha, ascb, 1);
588 __list_add(&alist, ascb->list.prev, &ascb->list);
595 struct asd_ascb *b = a;
596 list_for_each_entry(a, &alist, list) {
600 spin_lock_irqsave(&t->task_state_lock, flags);
601 t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
602 spin_unlock_irqrestore(&t->task_state_lock, flags);
603 switch (t->task_proto) {
604 case SAS_PROTOCOL_SATA:
605 case SAS_PROTOCOL_STP:
606 asd_unbuild_ata_ascb(a);
608 case SAS_PROTOCOL_SMP:
609 asd_unbuild_smp_ascb(a);
611 case SAS_PROTOCOL_SSP:
612 asd_unbuild_ssp_ascb(a);
619 list_del_init(&alist);
622 asd_ascb_free_list(ascb);
623 asd_can_dequeue(asd_ha, 1);