2 * PMC-Sierra PM8001/8081/8088/8089 SAS/SATA based host adapters driver
4 * Copyright (c) 2008-2009 USI Co., Ltd.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
14 * substantially similar to the "NO WARRANTY" disclaimer below
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16 * including a substantially similar Disclaimer requirement for further
17 * binary redistribution.
18 * 3. Neither the names of the above-listed copyright holders nor the names
19 * of any contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
22 * Alternatively, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2 as published by the Free
24 * Software Foundation.
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37 * POSSIBILITY OF SUCH DAMAGES.
41 #include <linux/slab.h>
42 #include "pm8001_sas.h"
45 * pm8001_find_tag - from sas task to find out tag that belongs to this task
46 * @task: the task sent to the LLDD
47 * @tag: the found tag associated with the task
49 static int pm8001_find_tag(struct sas_task *task, u32 *tag)
51 if (task->lldd_task) {
52 struct pm8001_ccb_info *ccb;
53 ccb = task->lldd_task;
61 * pm8001_tag_free - free the no more needed tag
62 * @pm8001_ha: our hba struct
63 * @tag: the found tag associated with the task
65 void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag)
67 void *bitmap = pm8001_ha->tags;
68 clear_bit(tag, bitmap);
72 * pm8001_tag_alloc - allocate a empty tag for task used.
73 * @pm8001_ha: our hba struct
74 * @tag_out: the found empty tag .
76 inline int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out)
79 void *bitmap = pm8001_ha->tags;
82 spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags);
83 tag = find_first_zero_bit(bitmap, pm8001_ha->tags_num);
84 if (tag >= pm8001_ha->tags_num) {
85 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
86 return -SAS_QUEUE_FULL;
89 spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags);
94 void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha)
97 for (i = 0; i < pm8001_ha->tags_num; ++i)
98 pm8001_tag_free(pm8001_ha, i);
102 * pm8001_mem_alloc - allocate memory for pm8001.
104 * @virt_addr: the allocated virtual address
105 * @pphys_addr_hi: the physical address high byte address.
106 * @pphys_addr_lo: the physical address low byte address.
107 * @mem_size: memory size.
109 int pm8001_mem_alloc(struct pci_dev *pdev, void **virt_addr,
110 dma_addr_t *pphys_addr, u32 *pphys_addr_hi,
111 u32 *pphys_addr_lo, u32 mem_size, u32 align)
113 caddr_t mem_virt_alloc;
114 dma_addr_t mem_dma_handle;
116 u64 align_offset = 0;
118 align_offset = (dma_addr_t)align - 1;
119 mem_virt_alloc = pci_zalloc_consistent(pdev, mem_size + align,
121 if (!mem_virt_alloc) {
122 pm8001_printk("memory allocation error\n");
125 *pphys_addr = mem_dma_handle;
126 phys_align = (*pphys_addr + align_offset) & ~align_offset;
127 *virt_addr = (void *)mem_virt_alloc + phys_align - *pphys_addr;
128 *pphys_addr_hi = upper_32_bits(phys_align);
129 *pphys_addr_lo = lower_32_bits(phys_align);
133 * pm8001_find_ha_by_dev - from domain device which come from sas layer to
134 * find out our hba struct.
135 * @dev: the domain device which from sas layer.
138 struct pm8001_hba_info *pm8001_find_ha_by_dev(struct domain_device *dev)
140 struct sas_ha_struct *sha = dev->port->ha;
141 struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
146 * pm8001_phy_control - this function should be registered to
147 * sas_domain_function_template to provide libsas used, note: this is just
148 * control the HBA phy rather than other expander phy if you want control
149 * other phy, you should use SMP command.
150 * @sas_phy: which phy in HBA phys.
151 * @func: the operation.
152 * @funcdata: always NULL.
154 int pm8001_phy_control(struct asd_sas_phy *sas_phy, enum phy_func func,
157 int rc = 0, phy_id = sas_phy->id;
158 struct pm8001_hba_info *pm8001_ha = NULL;
159 struct sas_phy_linkrates *rates;
160 DECLARE_COMPLETION_ONSTACK(completion);
162 pm8001_ha = sas_phy->ha->lldd_ha;
163 pm8001_ha->phy[phy_id].enable_completion = &completion;
165 case PHY_FUNC_SET_LINK_RATE:
167 if (rates->minimum_linkrate) {
168 pm8001_ha->phy[phy_id].minimum_linkrate =
169 rates->minimum_linkrate;
171 if (rates->maximum_linkrate) {
172 pm8001_ha->phy[phy_id].maximum_linkrate =
173 rates->maximum_linkrate;
175 if (pm8001_ha->phy[phy_id].phy_state == 0) {
176 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
177 wait_for_completion(&completion);
179 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
182 case PHY_FUNC_HARD_RESET:
183 if (pm8001_ha->phy[phy_id].phy_state == 0) {
184 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
185 wait_for_completion(&completion);
187 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
190 case PHY_FUNC_LINK_RESET:
191 if (pm8001_ha->phy[phy_id].phy_state == 0) {
192 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id);
193 wait_for_completion(&completion);
195 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
198 case PHY_FUNC_RELEASE_SPINUP_HOLD:
199 PM8001_CHIP_DISP->phy_ctl_req(pm8001_ha, phy_id,
202 case PHY_FUNC_DISABLE:
203 PM8001_CHIP_DISP->phy_stop_req(pm8001_ha, phy_id);
205 case PHY_FUNC_GET_EVENTS:
206 spin_lock_irqsave(&pm8001_ha->lock, flags);
207 if (pm8001_ha->chip_id == chip_8001) {
208 if (-1 == pm8001_bar4_shift(pm8001_ha,
209 (phy_id < 4) ? 0x30000 : 0x40000)) {
210 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
215 struct sas_phy *phy = sas_phy->phy;
216 uint32_t *qp = (uint32_t *)(((char *)
217 pm8001_ha->io_mem[2].memvirtaddr)
218 + 0x1034 + (0x4000 * (phy_id & 3)));
220 phy->invalid_dword_count = qp[0];
221 phy->running_disparity_error_count = qp[1];
222 phy->loss_of_dword_sync_count = qp[3];
223 phy->phy_reset_problem_count = qp[4];
225 if (pm8001_ha->chip_id == chip_8001)
226 pm8001_bar4_shift(pm8001_ha, 0);
227 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
237 * pm8001_scan_start - we should enable all HBA phys by sending the phy_start
239 * @shost: the scsi host data.
241 void pm8001_scan_start(struct Scsi_Host *shost)
244 struct pm8001_hba_info *pm8001_ha;
245 struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
246 pm8001_ha = sha->lldd_ha;
247 /* SAS_RE_INITIALIZATION not available in SPCv/ve */
248 if (pm8001_ha->chip_id == chip_8001)
249 PM8001_CHIP_DISP->sas_re_init_req(pm8001_ha);
250 for (i = 0; i < pm8001_ha->chip->n_phy; ++i)
251 PM8001_CHIP_DISP->phy_start_req(pm8001_ha, i);
254 int pm8001_scan_finished(struct Scsi_Host *shost, unsigned long time)
256 struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
258 /* give the phy enabling interrupt event time to come in (1s
259 * is empirically about all it takes) */
262 /* Wait for discovery to finish */
268 * pm8001_task_prep_smp - the dispatcher function, prepare data for smp task
269 * @pm8001_ha: our hba card information
270 * @ccb: the ccb which attached to smp task
272 static int pm8001_task_prep_smp(struct pm8001_hba_info *pm8001_ha,
273 struct pm8001_ccb_info *ccb)
275 return PM8001_CHIP_DISP->smp_req(pm8001_ha, ccb);
278 u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag)
280 struct ata_queued_cmd *qc = task->uldd_task;
282 if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
283 qc->tf.command == ATA_CMD_FPDMA_READ ||
284 qc->tf.command == ATA_CMD_FPDMA_RECV ||
285 qc->tf.command == ATA_CMD_FPDMA_SEND ||
286 qc->tf.command == ATA_CMD_NCQ_NON_DATA) {
295 * pm8001_task_prep_ata - the dispatcher function, prepare data for sata task
296 * @pm8001_ha: our hba card information
297 * @ccb: the ccb which attached to sata task
299 static int pm8001_task_prep_ata(struct pm8001_hba_info *pm8001_ha,
300 struct pm8001_ccb_info *ccb)
302 return PM8001_CHIP_DISP->sata_req(pm8001_ha, ccb);
306 * pm8001_task_prep_ssp_tm - the dispatcher function, prepare task management data
307 * @pm8001_ha: our hba card information
308 * @ccb: the ccb which attached to TM
309 * @tmf: the task management IU
311 static int pm8001_task_prep_ssp_tm(struct pm8001_hba_info *pm8001_ha,
312 struct pm8001_ccb_info *ccb, struct pm8001_tmf_task *tmf)
314 return PM8001_CHIP_DISP->ssp_tm_req(pm8001_ha, ccb, tmf);
318 * pm8001_task_prep_ssp - the dispatcher function,prepare ssp data for ssp task
319 * @pm8001_ha: our hba card information
320 * @ccb: the ccb which attached to ssp task
322 static int pm8001_task_prep_ssp(struct pm8001_hba_info *pm8001_ha,
323 struct pm8001_ccb_info *ccb)
325 return PM8001_CHIP_DISP->ssp_io_req(pm8001_ha, ccb);
328 /* Find the local port id that's attached to this device */
329 static int sas_find_local_port_id(struct domain_device *dev)
331 struct domain_device *pdev = dev->parent;
333 /* Directly attached device */
335 return dev->port->id;
337 struct domain_device *pdev_p = pdev->parent;
339 return pdev->port->id;
346 * pm8001_task_exec - queue the task(ssp, smp && ata) to the hardware.
347 * @task: the task to be execute.
348 * @num: if can_queue great than 1, the task can be queued up. for SMP task,
349 * we always execute one one time.
350 * @gfp_flags: gfp_flags.
351 * @is_tmf: if it is task management task.
352 * @tmf: the task management IU
354 #define DEV_IS_GONE(pm8001_dev) \
355 ((!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED)))
356 static int pm8001_task_exec(struct sas_task *task,
357 gfp_t gfp_flags, int is_tmf, struct pm8001_tmf_task *tmf)
359 struct domain_device *dev = task->dev;
360 struct pm8001_hba_info *pm8001_ha;
361 struct pm8001_device *pm8001_dev;
362 struct pm8001_port *port = NULL;
363 struct sas_task *t = task;
364 struct pm8001_ccb_info *ccb;
365 u32 tag = 0xdeadbeef, rc, n_elem = 0;
366 unsigned long flags = 0;
369 struct task_status_struct *tsm = &t->task_status;
370 tsm->resp = SAS_TASK_UNDELIVERED;
371 tsm->stat = SAS_PHY_DOWN;
372 if (dev->dev_type != SAS_SATA_DEV)
376 pm8001_ha = pm8001_find_ha_by_dev(task->dev);
377 if (pm8001_ha->controller_fatal_error) {
378 struct task_status_struct *ts = &t->task_status;
380 ts->resp = SAS_TASK_UNDELIVERED;
384 PM8001_IO_DBG(pm8001_ha, pm8001_printk("pm8001_task_exec device \n "));
385 spin_lock_irqsave(&pm8001_ha->lock, flags);
388 pm8001_dev = dev->lldd_dev;
389 port = &pm8001_ha->port[sas_find_local_port_id(dev)];
390 if (DEV_IS_GONE(pm8001_dev) || !port->port_attached) {
391 if (sas_protocol_ata(t->task_proto)) {
392 struct task_status_struct *ts = &t->task_status;
393 ts->resp = SAS_TASK_UNDELIVERED;
394 ts->stat = SAS_PHY_DOWN;
396 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
398 spin_lock_irqsave(&pm8001_ha->lock, flags);
401 struct task_status_struct *ts = &t->task_status;
402 ts->resp = SAS_TASK_UNDELIVERED;
403 ts->stat = SAS_PHY_DOWN;
408 rc = pm8001_tag_alloc(pm8001_ha, &tag);
411 ccb = &pm8001_ha->ccb_info[tag];
413 if (!sas_protocol_ata(t->task_proto)) {
414 if (t->num_scatter) {
415 n_elem = dma_map_sg(pm8001_ha->dev,
425 n_elem = t->num_scatter;
429 ccb->n_elem = n_elem;
432 ccb->device = pm8001_dev;
433 switch (t->task_proto) {
434 case SAS_PROTOCOL_SMP:
435 rc = pm8001_task_prep_smp(pm8001_ha, ccb);
437 case SAS_PROTOCOL_SSP:
439 rc = pm8001_task_prep_ssp_tm(pm8001_ha,
442 rc = pm8001_task_prep_ssp(pm8001_ha, ccb);
444 case SAS_PROTOCOL_SATA:
445 case SAS_PROTOCOL_STP:
446 rc = pm8001_task_prep_ata(pm8001_ha, ccb);
449 dev_printk(KERN_ERR, pm8001_ha->dev,
450 "unknown sas_task proto: 0x%x\n",
457 PM8001_IO_DBG(pm8001_ha,
458 pm8001_printk("rc is %x\n", rc));
461 /* TODO: select normal or high priority */
462 spin_lock(&t->task_state_lock);
463 t->task_state_flags |= SAS_TASK_AT_INITIATOR;
464 spin_unlock(&t->task_state_lock);
465 pm8001_dev->running_req++;
471 pm8001_tag_free(pm8001_ha, tag);
473 dev_printk(KERN_ERR, pm8001_ha->dev, "pm8001 exec failed[%d]!\n", rc);
474 if (!sas_protocol_ata(t->task_proto))
476 dma_unmap_sg(pm8001_ha->dev, t->scatter, t->num_scatter,
479 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
484 * pm8001_queue_command - register for upper layer used, all IO commands sent
485 * to HBA are from this interface.
486 * @task: the task to be execute.
487 * @gfp_flags: gfp_flags
489 int pm8001_queue_command(struct sas_task *task, gfp_t gfp_flags)
491 return pm8001_task_exec(task, gfp_flags, 0, NULL);
495 * pm8001_ccb_task_free - free the sg for ssp and smp command, free the ccb.
496 * @pm8001_ha: our hba card information
497 * @ccb: the ccb which attached to ssp task
498 * @task: the task to be free.
499 * @ccb_idx: ccb index.
501 void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha,
502 struct sas_task *task, struct pm8001_ccb_info *ccb, u32 ccb_idx)
506 if (!sas_protocol_ata(task->task_proto))
508 dma_unmap_sg(pm8001_ha->dev, task->scatter,
509 task->num_scatter, task->data_dir);
511 switch (task->task_proto) {
512 case SAS_PROTOCOL_SMP:
513 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_resp, 1,
515 dma_unmap_sg(pm8001_ha->dev, &task->smp_task.smp_req, 1,
519 case SAS_PROTOCOL_SATA:
520 case SAS_PROTOCOL_STP:
521 case SAS_PROTOCOL_SSP:
526 task->lldd_task = NULL;
528 ccb->ccb_tag = 0xFFFFFFFF;
530 pm8001_tag_free(pm8001_ha, ccb_idx);
534 * pm8001_alloc_dev - find a empty pm8001_device
535 * @pm8001_ha: our hba card information
537 static struct pm8001_device *pm8001_alloc_dev(struct pm8001_hba_info *pm8001_ha)
540 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
541 if (pm8001_ha->devices[dev].dev_type == SAS_PHY_UNUSED) {
542 pm8001_ha->devices[dev].id = dev;
543 return &pm8001_ha->devices[dev];
546 if (dev == PM8001_MAX_DEVICES) {
547 PM8001_FAIL_DBG(pm8001_ha,
548 pm8001_printk("max support %d devices, ignore ..\n",
549 PM8001_MAX_DEVICES));
554 * pm8001_find_dev - find a matching pm8001_device
555 * @pm8001_ha: our hba card information
557 struct pm8001_device *pm8001_find_dev(struct pm8001_hba_info *pm8001_ha,
561 for (dev = 0; dev < PM8001_MAX_DEVICES; dev++) {
562 if (pm8001_ha->devices[dev].device_id == device_id)
563 return &pm8001_ha->devices[dev];
565 if (dev == PM8001_MAX_DEVICES) {
566 PM8001_FAIL_DBG(pm8001_ha, pm8001_printk("NO MATCHING "
567 "DEVICE FOUND !!!\n"));
572 static void pm8001_free_dev(struct pm8001_device *pm8001_dev)
574 u32 id = pm8001_dev->id;
575 memset(pm8001_dev, 0, sizeof(*pm8001_dev));
577 pm8001_dev->dev_type = SAS_PHY_UNUSED;
578 pm8001_dev->device_id = PM8001_MAX_DEVICES;
579 pm8001_dev->sas_device = NULL;
583 * pm8001_dev_found_notify - libsas notify a device is found.
584 * @dev: the device structure which sas layer used.
586 * when libsas find a sas domain device, it should tell the LLDD that
587 * device is found, and then LLDD register this device to HBA firmware
588 * by the command "OPC_INB_REG_DEV", after that the HBA will assign a
589 * device ID(according to device's sas address) and returned it to LLDD. From
590 * now on, we communicate with HBA FW with the device ID which HBA assigned
591 * rather than sas address. it is the necessary step for our HBA but it is
592 * the optional for other HBA driver.
594 static int pm8001_dev_found_notify(struct domain_device *dev)
596 unsigned long flags = 0;
598 struct pm8001_hba_info *pm8001_ha = NULL;
599 struct domain_device *parent_dev = dev->parent;
600 struct pm8001_device *pm8001_device;
601 DECLARE_COMPLETION_ONSTACK(completion);
603 pm8001_ha = pm8001_find_ha_by_dev(dev);
604 spin_lock_irqsave(&pm8001_ha->lock, flags);
606 pm8001_device = pm8001_alloc_dev(pm8001_ha);
607 if (!pm8001_device) {
611 pm8001_device->sas_device = dev;
612 dev->lldd_dev = pm8001_device;
613 pm8001_device->dev_type = dev->dev_type;
614 pm8001_device->dcompletion = &completion;
615 if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
618 for (phy_id = 0; phy_id < parent_dev->ex_dev.num_phys;
620 phy = &parent_dev->ex_dev.ex_phy[phy_id];
621 if (SAS_ADDR(phy->attached_sas_addr)
622 == SAS_ADDR(dev->sas_addr)) {
623 pm8001_device->attached_phy = phy_id;
627 if (phy_id == parent_dev->ex_dev.num_phys) {
628 PM8001_FAIL_DBG(pm8001_ha,
629 pm8001_printk("Error: no attached dev:%016llx"
630 " at ex:%016llx.\n", SAS_ADDR(dev->sas_addr),
631 SAS_ADDR(parent_dev->sas_addr)));
635 if (dev->dev_type == SAS_SATA_DEV) {
636 pm8001_device->attached_phy =
637 dev->rphy->identify.phy_identifier;
638 flag = 1; /* directly sata*/
640 } /*register this device to HBA*/
641 PM8001_DISC_DBG(pm8001_ha, pm8001_printk("Found device\n"));
642 PM8001_CHIP_DISP->reg_dev_req(pm8001_ha, pm8001_device, flag);
643 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
644 wait_for_completion(&completion);
645 if (dev->dev_type == SAS_END_DEVICE)
647 pm8001_ha->flags = PM8001F_RUN_TIME;
650 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
654 int pm8001_dev_found(struct domain_device *dev)
656 return pm8001_dev_found_notify(dev);
659 void pm8001_task_done(struct sas_task *task)
661 if (!del_timer(&task->slow_task->timer))
663 complete(&task->slow_task->completion);
666 static void pm8001_tmf_timedout(unsigned long data)
668 struct sas_task *task = (struct sas_task *)data;
670 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
671 complete(&task->slow_task->completion);
674 #define PM8001_TASK_TIMEOUT 20
676 * pm8001_exec_internal_tmf_task - execute some task management commands.
677 * @dev: the wanted device.
678 * @tmf: which task management wanted to be take.
679 * @para_len: para_len.
680 * @parameter: ssp task parameter.
682 * when errors or exception happened, we may want to do something, for example
683 * abort the issued task which result in this execption, it is done by calling
684 * this function, note it is also with the task execute interface.
686 static int pm8001_exec_internal_tmf_task(struct domain_device *dev,
687 void *parameter, u32 para_len, struct pm8001_tmf_task *tmf)
690 struct sas_task *task = NULL;
691 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
692 struct pm8001_device *pm8001_dev = dev->lldd_dev;
693 DECLARE_COMPLETION_ONSTACK(completion_setstate);
695 for (retry = 0; retry < 3; retry++) {
696 task = sas_alloc_slow_task(GFP_KERNEL);
701 task->task_proto = dev->tproto;
702 memcpy(&task->ssp_task, parameter, para_len);
703 task->task_done = pm8001_task_done;
704 task->slow_task->timer.data = (unsigned long)task;
705 task->slow_task->timer.function = pm8001_tmf_timedout;
706 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT*HZ;
707 add_timer(&task->slow_task->timer);
709 res = pm8001_task_exec(task, GFP_KERNEL, 1, tmf);
712 del_timer(&task->slow_task->timer);
713 PM8001_FAIL_DBG(pm8001_ha,
714 pm8001_printk("Executing internal task "
718 wait_for_completion(&task->slow_task->completion);
719 if (pm8001_ha->chip_id != chip_8001) {
720 pm8001_dev->setds_completion = &completion_setstate;
721 PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
723 wait_for_completion(&completion_setstate);
725 res = -TMF_RESP_FUNC_FAILED;
726 /* Even TMF timed out, return direct. */
727 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
728 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
729 PM8001_FAIL_DBG(pm8001_ha,
730 pm8001_printk("TMF task[%x]timeout.\n",
736 if (task->task_status.resp == SAS_TASK_COMPLETE &&
737 task->task_status.stat == SAM_STAT_GOOD) {
738 res = TMF_RESP_FUNC_COMPLETE;
742 if (task->task_status.resp == SAS_TASK_COMPLETE &&
743 task->task_status.stat == SAS_DATA_UNDERRUN) {
744 /* no error, but return the number of bytes of
746 res = task->task_status.residual;
750 if (task->task_status.resp == SAS_TASK_COMPLETE &&
751 task->task_status.stat == SAS_DATA_OVERRUN) {
752 PM8001_FAIL_DBG(pm8001_ha,
753 pm8001_printk("Blocked task error.\n"));
757 PM8001_EH_DBG(pm8001_ha,
758 pm8001_printk(" Task to dev %016llx response:"
759 "0x%x status 0x%x\n",
760 SAS_ADDR(dev->sas_addr),
761 task->task_status.resp,
762 task->task_status.stat));
768 BUG_ON(retry == 3 && task != NULL);
774 pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
775 struct pm8001_device *pm8001_dev, struct domain_device *dev, u32 flag,
780 struct pm8001_ccb_info *ccb;
781 struct sas_task *task = NULL;
783 for (retry = 0; retry < 3; retry++) {
784 task = sas_alloc_slow_task(GFP_KERNEL);
789 task->task_proto = dev->tproto;
790 task->task_done = pm8001_task_done;
791 task->slow_task->timer.data = (unsigned long)task;
792 task->slow_task->timer.function = pm8001_tmf_timedout;
793 task->slow_task->timer.expires = jiffies + PM8001_TASK_TIMEOUT * HZ;
794 add_timer(&task->slow_task->timer);
796 res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
799 ccb = &pm8001_ha->ccb_info[ccb_tag];
800 ccb->device = pm8001_dev;
801 ccb->ccb_tag = ccb_tag;
805 res = PM8001_CHIP_DISP->task_abort(pm8001_ha,
806 pm8001_dev, flag, task_tag, ccb_tag);
809 del_timer(&task->slow_task->timer);
810 PM8001_FAIL_DBG(pm8001_ha,
811 pm8001_printk("Executing internal task "
815 wait_for_completion(&task->slow_task->completion);
816 res = TMF_RESP_FUNC_FAILED;
817 /* Even TMF timed out, return direct. */
818 if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
819 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
820 PM8001_FAIL_DBG(pm8001_ha,
821 pm8001_printk("TMF task timeout.\n"));
826 if (task->task_status.resp == SAS_TASK_COMPLETE &&
827 task->task_status.stat == SAM_STAT_GOOD) {
828 res = TMF_RESP_FUNC_COMPLETE;
832 PM8001_EH_DBG(pm8001_ha,
833 pm8001_printk(" Task to dev %016llx response: "
834 "0x%x status 0x%x\n",
835 SAS_ADDR(dev->sas_addr),
836 task->task_status.resp,
837 task->task_status.stat));
843 BUG_ON(retry == 3 && task != NULL);
849 * pm8001_dev_gone_notify - see the comments for "pm8001_dev_found_notify"
850 * @dev: the device structure which sas layer used.
852 static void pm8001_dev_gone_notify(struct domain_device *dev)
854 unsigned long flags = 0;
855 struct pm8001_hba_info *pm8001_ha;
856 struct pm8001_device *pm8001_dev = dev->lldd_dev;
858 pm8001_ha = pm8001_find_ha_by_dev(dev);
859 spin_lock_irqsave(&pm8001_ha->lock, flags);
861 u32 device_id = pm8001_dev->device_id;
863 PM8001_DISC_DBG(pm8001_ha,
864 pm8001_printk("found dev[%d:%x] is gone.\n",
865 pm8001_dev->device_id, pm8001_dev->dev_type));
866 if (pm8001_dev->running_req) {
867 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
868 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
870 spin_lock_irqsave(&pm8001_ha->lock, flags);
872 PM8001_CHIP_DISP->dereg_dev_req(pm8001_ha, device_id);
873 pm8001_free_dev(pm8001_dev);
875 PM8001_DISC_DBG(pm8001_ha,
876 pm8001_printk("Found dev has gone.\n"));
878 dev->lldd_dev = NULL;
879 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
882 void pm8001_dev_gone(struct domain_device *dev)
884 pm8001_dev_gone_notify(dev);
887 static int pm8001_issue_ssp_tmf(struct domain_device *dev,
888 u8 *lun, struct pm8001_tmf_task *tmf)
890 struct sas_ssp_task ssp_task;
891 if (!(dev->tproto & SAS_PROTOCOL_SSP))
892 return TMF_RESP_FUNC_ESUPP;
894 strncpy((u8 *)&ssp_task.LUN, lun, 8);
895 return pm8001_exec_internal_tmf_task(dev, &ssp_task, sizeof(ssp_task),
899 /* retry commands by ha, by task and/or by device */
900 void pm8001_open_reject_retry(
901 struct pm8001_hba_info *pm8001_ha,
902 struct sas_task *task_to_close,
903 struct pm8001_device *device_to_close)
908 if (pm8001_ha == NULL)
911 spin_lock_irqsave(&pm8001_ha->lock, flags);
913 for (i = 0; i < PM8001_MAX_CCB; i++) {
914 struct sas_task *task;
915 struct task_status_struct *ts;
916 struct pm8001_device *pm8001_dev;
917 unsigned long flags1;
919 struct pm8001_ccb_info *ccb = &pm8001_ha->ccb_info[i];
921 pm8001_dev = ccb->device;
922 if (!pm8001_dev || (pm8001_dev->dev_type == SAS_PHY_UNUSED))
924 if (!device_to_close) {
925 uintptr_t d = (uintptr_t)pm8001_dev
926 - (uintptr_t)&pm8001_ha->devices;
927 if (((d % sizeof(*pm8001_dev)) != 0)
928 || ((d / sizeof(*pm8001_dev)) >= PM8001_MAX_DEVICES))
930 } else if (pm8001_dev != device_to_close)
933 if (!tag || (tag == 0xFFFFFFFF))
936 if (!task || !task->task_done)
938 if (task_to_close && (task != task_to_close))
940 ts = &task->task_status;
941 ts->resp = SAS_TASK_COMPLETE;
942 /* Force the midlayer to retry */
943 ts->stat = SAS_OPEN_REJECT;
944 ts->open_rej_reason = SAS_OREJ_RSVD_RETRY;
946 pm8001_dev->running_req--;
947 spin_lock_irqsave(&task->task_state_lock, flags1);
948 task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
949 task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
950 task->task_state_flags |= SAS_TASK_STATE_DONE;
951 if (unlikely((task->task_state_flags
952 & SAS_TASK_STATE_ABORTED))) {
953 spin_unlock_irqrestore(&task->task_state_lock,
955 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
957 spin_unlock_irqrestore(&task->task_state_lock,
959 pm8001_ccb_task_free(pm8001_ha, task, ccb, tag);
960 mb();/* in order to force CPU ordering */
961 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
962 task->task_done(task);
963 spin_lock_irqsave(&pm8001_ha->lock, flags);
967 spin_unlock_irqrestore(&pm8001_ha->lock, flags);
971 * Standard mandates link reset for ATA (type 0) and hard reset for
972 * SSP (type 1) , only for RECOVERY
974 int pm8001_I_T_nexus_reset(struct domain_device *dev)
976 int rc = TMF_RESP_FUNC_FAILED;
977 struct pm8001_device *pm8001_dev;
978 struct pm8001_hba_info *pm8001_ha;
981 if (!dev || !dev->lldd_dev)
984 pm8001_dev = dev->lldd_dev;
985 pm8001_ha = pm8001_find_ha_by_dev(dev);
986 phy = sas_get_local_phy(dev);
988 if (dev_is_sata(dev)) {
989 if (scsi_is_sas_phy_local(phy)) {
993 rc = sas_phy_reset(phy, 1);
995 PM8001_EH_DBG(pm8001_ha,
996 pm8001_printk("phy reset failed for device %x\n"
997 "with rc %d\n", pm8001_dev->device_id, rc));
998 rc = TMF_RESP_FUNC_FAILED;
1002 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1005 PM8001_EH_DBG(pm8001_ha,
1006 pm8001_printk("task abort failed %x\n"
1007 "with rc %d\n", pm8001_dev->device_id, rc));
1008 rc = TMF_RESP_FUNC_FAILED;
1011 rc = sas_phy_reset(phy, 1);
1014 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1015 pm8001_dev->device_id, rc));
1017 sas_put_local_phy(phy);
1022 * This function handle the IT_NEXUS_XXX event or completion
1023 * status code for SSP/SATA/SMP I/O request.
1025 int pm8001_I_T_nexus_event_handler(struct domain_device *dev)
1027 int rc = TMF_RESP_FUNC_FAILED;
1028 struct pm8001_device *pm8001_dev;
1029 struct pm8001_hba_info *pm8001_ha;
1030 struct sas_phy *phy;
1033 if (!dev || !dev->lldd_dev)
1036 pm8001_dev = dev->lldd_dev;
1037 device_id = pm8001_dev->device_id;
1038 pm8001_ha = pm8001_find_ha_by_dev(dev);
1040 PM8001_EH_DBG(pm8001_ha,
1041 pm8001_printk("I_T_Nexus handler invoked !!"));
1043 phy = sas_get_local_phy(dev);
1045 if (dev_is_sata(dev)) {
1046 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1047 if (scsi_is_sas_phy_local(phy)) {
1051 /* send internal ssp/sata/smp abort command to FW */
1052 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1056 /* deregister the target device */
1057 pm8001_dev_gone_notify(dev);
1060 /*send phy reset to hard reset target */
1061 rc = sas_phy_reset(phy, 1);
1063 pm8001_dev->setds_completion = &completion_setstate;
1065 wait_for_completion(&completion_setstate);
1067 /* send internal ssp/sata/smp abort command to FW */
1068 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1072 /* deregister the target device */
1073 pm8001_dev_gone_notify(dev);
1076 /*send phy reset to hard reset target */
1077 rc = sas_phy_reset(phy, 1);
1080 PM8001_EH_DBG(pm8001_ha, pm8001_printk(" for device[%x]:rc=%d\n",
1081 pm8001_dev->device_id, rc));
1083 sas_put_local_phy(phy);
1087 /* mandatory SAM-3, the task reset the specified LUN*/
1088 int pm8001_lu_reset(struct domain_device *dev, u8 *lun)
1090 int rc = TMF_RESP_FUNC_FAILED;
1091 struct pm8001_tmf_task tmf_task;
1092 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1093 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1094 DECLARE_COMPLETION_ONSTACK(completion_setstate);
1095 if (dev_is_sata(dev)) {
1096 struct sas_phy *phy = sas_get_local_phy(dev);
1097 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev ,
1099 rc = sas_phy_reset(phy, 1);
1100 sas_put_local_phy(phy);
1101 pm8001_dev->setds_completion = &completion_setstate;
1102 rc = PM8001_CHIP_DISP->set_dev_state_req(pm8001_ha,
1104 wait_for_completion(&completion_setstate);
1106 tmf_task.tmf = TMF_LU_RESET;
1107 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1109 /* If failed, fall-through I_T_Nexus reset */
1110 PM8001_EH_DBG(pm8001_ha, pm8001_printk("for device[%x]:rc=%d\n",
1111 pm8001_dev->device_id, rc));
1115 /* optional SAM-3 */
1116 int pm8001_query_task(struct sas_task *task)
1118 u32 tag = 0xdeadbeef;
1120 struct scsi_lun lun;
1121 struct pm8001_tmf_task tmf_task;
1122 int rc = TMF_RESP_FUNC_FAILED;
1123 if (unlikely(!task || !task->lldd_task || !task->dev))
1126 if (task->task_proto & SAS_PROTOCOL_SSP) {
1127 struct scsi_cmnd *cmnd = task->uldd_task;
1128 struct domain_device *dev = task->dev;
1129 struct pm8001_hba_info *pm8001_ha =
1130 pm8001_find_ha_by_dev(dev);
1132 int_to_scsilun(cmnd->device->lun, &lun);
1133 rc = pm8001_find_tag(task, &tag);
1135 rc = TMF_RESP_FUNC_FAILED;
1138 PM8001_EH_DBG(pm8001_ha, pm8001_printk("Query:["));
1139 for (i = 0; i < 16; i++)
1140 printk(KERN_INFO "%02x ", cmnd->cmnd[i]);
1141 printk(KERN_INFO "]\n");
1142 tmf_task.tmf = TMF_QUERY_TASK;
1143 tmf_task.tag_of_task_to_be_managed = tag;
1145 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1147 /* The task is still in Lun, release it then */
1148 case TMF_RESP_FUNC_SUCC:
1149 PM8001_EH_DBG(pm8001_ha,
1150 pm8001_printk("The task is still in Lun\n"));
1152 /* The task is not in Lun or failed, reset the phy */
1153 case TMF_RESP_FUNC_FAILED:
1154 case TMF_RESP_FUNC_COMPLETE:
1155 PM8001_EH_DBG(pm8001_ha,
1156 pm8001_printk("The task is not in Lun or failed,"
1157 " reset the phy\n"));
1161 pm8001_printk(":rc= %d\n", rc);
1165 /* mandatory SAM-3, still need free task/ccb info, abord the specified task */
1166 int pm8001_abort_task(struct sas_task *task)
1168 unsigned long flags;
1169 u32 tag = 0xdeadbeef;
1171 struct domain_device *dev ;
1172 struct pm8001_hba_info *pm8001_ha = NULL;
1173 struct pm8001_ccb_info *ccb;
1174 struct scsi_lun lun;
1175 struct pm8001_device *pm8001_dev;
1176 struct pm8001_tmf_task tmf_task;
1177 int rc = TMF_RESP_FUNC_FAILED;
1178 if (unlikely(!task || !task->lldd_task || !task->dev))
1180 spin_lock_irqsave(&task->task_state_lock, flags);
1181 if (task->task_state_flags & SAS_TASK_STATE_DONE) {
1182 spin_unlock_irqrestore(&task->task_state_lock, flags);
1183 rc = TMF_RESP_FUNC_COMPLETE;
1186 spin_unlock_irqrestore(&task->task_state_lock, flags);
1187 if (task->task_proto & SAS_PROTOCOL_SSP) {
1188 struct scsi_cmnd *cmnd = task->uldd_task;
1190 ccb = task->lldd_task;
1191 pm8001_dev = dev->lldd_dev;
1192 pm8001_ha = pm8001_find_ha_by_dev(dev);
1193 int_to_scsilun(cmnd->device->lun, &lun);
1194 rc = pm8001_find_tag(task, &tag);
1196 printk(KERN_INFO "No such tag in %s\n", __func__);
1197 rc = TMF_RESP_FUNC_FAILED;
1200 device_id = pm8001_dev->device_id;
1201 PM8001_EH_DBG(pm8001_ha,
1202 pm8001_printk("abort io to deviceid= %d\n", device_id));
1203 tmf_task.tmf = TMF_ABORT_TASK;
1204 tmf_task.tag_of_task_to_be_managed = tag;
1205 rc = pm8001_issue_ssp_tmf(dev, lun.scsi_lun, &tmf_task);
1206 pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1207 pm8001_dev->sas_device, 0, tag);
1208 } else if (task->task_proto & SAS_PROTOCOL_SATA ||
1209 task->task_proto & SAS_PROTOCOL_STP) {
1211 pm8001_dev = dev->lldd_dev;
1212 pm8001_ha = pm8001_find_ha_by_dev(dev);
1213 rc = pm8001_find_tag(task, &tag);
1215 printk(KERN_INFO "No such tag in %s\n", __func__);
1216 rc = TMF_RESP_FUNC_FAILED;
1219 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1220 pm8001_dev->sas_device, 0, tag);
1221 } else if (task->task_proto & SAS_PROTOCOL_SMP) {
1224 pm8001_dev = dev->lldd_dev;
1225 pm8001_ha = pm8001_find_ha_by_dev(dev);
1226 rc = pm8001_find_tag(task, &tag);
1228 printk(KERN_INFO "No such tag in %s\n", __func__);
1229 rc = TMF_RESP_FUNC_FAILED;
1232 rc = pm8001_exec_internal_task_abort(pm8001_ha, pm8001_dev,
1233 pm8001_dev->sas_device, 0, tag);
1237 if (rc != TMF_RESP_FUNC_COMPLETE)
1238 pm8001_printk("rc= %d\n", rc);
1242 int pm8001_abort_task_set(struct domain_device *dev, u8 *lun)
1244 int rc = TMF_RESP_FUNC_FAILED;
1245 struct pm8001_tmf_task tmf_task;
1247 tmf_task.tmf = TMF_ABORT_TASK_SET;
1248 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1252 int pm8001_clear_aca(struct domain_device *dev, u8 *lun)
1254 int rc = TMF_RESP_FUNC_FAILED;
1255 struct pm8001_tmf_task tmf_task;
1257 tmf_task.tmf = TMF_CLEAR_ACA;
1258 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);
1263 int pm8001_clear_task_set(struct domain_device *dev, u8 *lun)
1265 int rc = TMF_RESP_FUNC_FAILED;
1266 struct pm8001_tmf_task tmf_task;
1267 struct pm8001_device *pm8001_dev = dev->lldd_dev;
1268 struct pm8001_hba_info *pm8001_ha = pm8001_find_ha_by_dev(dev);
1270 PM8001_EH_DBG(pm8001_ha,
1271 pm8001_printk("I_T_L_Q clear task set[%x]\n",
1272 pm8001_dev->device_id));
1273 tmf_task.tmf = TMF_CLEAR_TASK_SET;
1274 rc = pm8001_issue_ssp_tmf(dev, lun, &tmf_task);