linux_dsm_epyc7002/drivers/scsi/hisi_sas/hisi_sas_main.c
Kees Cook 841b86f328 treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts
With all callbacks converted, and the timer callback prototype
switched over, the TIMER_FUNC_TYPE cast is no longer needed,
so remove it. Conversion was done with the following scripts:

    perl -pi -e 's|\(TIMER_FUNC_TYPE\)||g' \
        $(git grep TIMER_FUNC_TYPE | cut -d: -f1 | sort -u)

    perl -pi -e 's|\(TIMER_DATA_TYPE\)||g' \
        $(git grep TIMER_DATA_TYPE | cut -d: -f1 | sort -u)

The now unused macros are also dropped from include/linux/timer.h.

Signed-off-by: Kees Cook <keescook@chromium.org>
2017-11-21 16:35:54 -08:00

2051 lines
54 KiB
C

/*
* Copyright (c) 2015 Linaro Ltd.
* Copyright (c) 2015 Hisilicon Limited.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include "hisi_sas.h"
#define DRV_NAME "hisi_sas"
#define DEV_IS_GONE(dev) \
((!dev) || (dev->dev_type == SAS_PHY_UNUSED))
static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
u8 *lun, struct hisi_sas_tmf_task *tmf);
static int
hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
struct domain_device *device,
int abort_flag, int tag);
static int hisi_sas_softreset_ata_disk(struct domain_device *device);
u8 hisi_sas_get_ata_protocol(u8 cmd, int direction)
{
switch (cmd) {
case ATA_CMD_FPDMA_WRITE:
case ATA_CMD_FPDMA_READ:
case ATA_CMD_FPDMA_RECV:
case ATA_CMD_FPDMA_SEND:
case ATA_CMD_NCQ_NON_DATA:
return HISI_SAS_SATA_PROTOCOL_FPDMA;
case ATA_CMD_DOWNLOAD_MICRO:
case ATA_CMD_ID_ATA:
case ATA_CMD_PMP_READ:
case ATA_CMD_READ_LOG_EXT:
case ATA_CMD_PIO_READ:
case ATA_CMD_PIO_READ_EXT:
case ATA_CMD_PMP_WRITE:
case ATA_CMD_WRITE_LOG_EXT:
case ATA_CMD_PIO_WRITE:
case ATA_CMD_PIO_WRITE_EXT:
return HISI_SAS_SATA_PROTOCOL_PIO;
case ATA_CMD_DSM:
case ATA_CMD_DOWNLOAD_MICRO_DMA:
case ATA_CMD_PMP_READ_DMA:
case ATA_CMD_PMP_WRITE_DMA:
case ATA_CMD_READ:
case ATA_CMD_READ_EXT:
case ATA_CMD_READ_LOG_DMA_EXT:
case ATA_CMD_READ_STREAM_DMA_EXT:
case ATA_CMD_TRUSTED_RCV_DMA:
case ATA_CMD_TRUSTED_SND_DMA:
case ATA_CMD_WRITE:
case ATA_CMD_WRITE_EXT:
case ATA_CMD_WRITE_FUA_EXT:
case ATA_CMD_WRITE_QUEUED:
case ATA_CMD_WRITE_LOG_DMA_EXT:
case ATA_CMD_WRITE_STREAM_DMA_EXT:
case ATA_CMD_ZAC_MGMT_IN:
return HISI_SAS_SATA_PROTOCOL_DMA;
case ATA_CMD_CHK_POWER:
case ATA_CMD_DEV_RESET:
case ATA_CMD_EDD:
case ATA_CMD_FLUSH:
case ATA_CMD_FLUSH_EXT:
case ATA_CMD_VERIFY:
case ATA_CMD_VERIFY_EXT:
case ATA_CMD_SET_FEATURES:
case ATA_CMD_STANDBY:
case ATA_CMD_STANDBYNOW1:
case ATA_CMD_ZAC_MGMT_OUT:
return HISI_SAS_SATA_PROTOCOL_NONDATA;
default:
if (direction == DMA_NONE)
return HISI_SAS_SATA_PROTOCOL_NONDATA;
return HISI_SAS_SATA_PROTOCOL_PIO;
}
}
EXPORT_SYMBOL_GPL(hisi_sas_get_ata_protocol);
void hisi_sas_sata_done(struct sas_task *task,
struct hisi_sas_slot *slot)
{
struct task_status_struct *ts = &task->task_status;
struct ata_task_resp *resp = (struct ata_task_resp *)ts->buf;
struct hisi_sas_status_buffer *status_buf =
hisi_sas_status_buf_addr_mem(slot);
u8 *iu = &status_buf->iu[0];
struct dev_to_host_fis *d2h = (struct dev_to_host_fis *)iu;
resp->frame_len = sizeof(struct dev_to_host_fis);
memcpy(&resp->ending_fis[0], d2h, sizeof(struct dev_to_host_fis));
ts->buf_valid_size = sizeof(*resp);
}
EXPORT_SYMBOL_GPL(hisi_sas_sata_done);
int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag)
{
struct ata_queued_cmd *qc = task->uldd_task;
if (qc) {
if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
qc->tf.command == ATA_CMD_FPDMA_READ) {
*tag = qc->tag;
return 1;
}
}
return 0;
}
EXPORT_SYMBOL_GPL(hisi_sas_get_ncq_tag);
static struct hisi_hba *dev_to_hisi_hba(struct domain_device *device)
{
return device->port->ha->lldd_ha;
}
struct hisi_sas_port *to_hisi_sas_port(struct asd_sas_port *sas_port)
{
return container_of(sas_port, struct hisi_sas_port, sas_port);
}
EXPORT_SYMBOL_GPL(to_hisi_sas_port);
void hisi_sas_stop_phys(struct hisi_hba *hisi_hba)
{
int phy_no;
for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++)
hisi_hba->hw->phy_disable(hisi_hba, phy_no);
}
EXPORT_SYMBOL_GPL(hisi_sas_stop_phys);
static void hisi_sas_slot_index_clear(struct hisi_hba *hisi_hba, int slot_idx)
{
void *bitmap = hisi_hba->slot_index_tags;
clear_bit(slot_idx, bitmap);
}
static void hisi_sas_slot_index_free(struct hisi_hba *hisi_hba, int slot_idx)
{
hisi_sas_slot_index_clear(hisi_hba, slot_idx);
}
static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx)
{
void *bitmap = hisi_hba->slot_index_tags;
set_bit(slot_idx, bitmap);
}
static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, int *slot_idx)
{
unsigned int index;
void *bitmap = hisi_hba->slot_index_tags;
index = find_first_zero_bit(bitmap, hisi_hba->slot_index_count);
if (index >= hisi_hba->slot_index_count)
return -SAS_QUEUE_FULL;
hisi_sas_slot_index_set(hisi_hba, index);
*slot_idx = index;
return 0;
}
static void hisi_sas_slot_index_init(struct hisi_hba *hisi_hba)
{
int i;
for (i = 0; i < hisi_hba->slot_index_count; ++i)
hisi_sas_slot_index_clear(hisi_hba, i);
}
void hisi_sas_slot_task_free(struct hisi_hba *hisi_hba, struct sas_task *task,
struct hisi_sas_slot *slot)
{
if (task) {
struct device *dev = hisi_hba->dev;
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
if (!task->lldd_task)
return;
task->lldd_task = NULL;
if (!sas_protocol_ata(task->task_proto))
if (slot->n_elem)
dma_unmap_sg(dev, task->scatter, slot->n_elem,
task->data_dir);
if (sas_dev)
atomic64_dec(&sas_dev->running_req);
}
if (slot->buf)
dma_pool_free(hisi_hba->buffer_pool, slot->buf, slot->buf_dma);
list_del_init(&slot->entry);
slot->buf = NULL;
slot->task = NULL;
slot->port = NULL;
hisi_sas_slot_index_free(hisi_hba, slot->idx);
/* slot memory is fully zeroed when it is reused */
}
EXPORT_SYMBOL_GPL(hisi_sas_slot_task_free);
static int hisi_sas_task_prep_smp(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot)
{
return hisi_hba->hw->prep_smp(hisi_hba, slot);
}
static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int is_tmf,
struct hisi_sas_tmf_task *tmf)
{
return hisi_hba->hw->prep_ssp(hisi_hba, slot, is_tmf, tmf);
}
static int hisi_sas_task_prep_ata(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot)
{
return hisi_hba->hw->prep_stp(hisi_hba, slot);
}
static int hisi_sas_task_prep_abort(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot,
int device_id, int abort_flag, int tag_to_abort)
{
return hisi_hba->hw->prep_abort(hisi_hba, slot,
device_id, abort_flag, tag_to_abort);
}
/*
* This function will issue an abort TMF regardless of whether the
* task is in the sdev or not. Then it will do the task complete
* cleanup and callbacks.
*/
static void hisi_sas_slot_abort(struct work_struct *work)
{
struct hisi_sas_slot *abort_slot =
container_of(work, struct hisi_sas_slot, abort_slot);
struct sas_task *task = abort_slot->task;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
struct scsi_cmnd *cmnd = task->uldd_task;
struct hisi_sas_tmf_task tmf_task;
struct scsi_lun lun;
struct device *dev = hisi_hba->dev;
int tag = abort_slot->idx;
unsigned long flags;
if (!(task->task_proto & SAS_PROTOCOL_SSP)) {
dev_err(dev, "cannot abort slot for non-ssp task\n");
goto out;
}
int_to_scsilun(cmnd->device->lun, &lun);
tmf_task.tmf = TMF_ABORT_TASK;
tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun, &tmf_task);
out:
/* Do cleanup for this task */
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_slot_task_free(hisi_hba, task, abort_slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
if (task->task_done)
task->task_done(task);
}
static int hisi_sas_task_prep(struct sas_task *task, struct hisi_sas_dq
*dq, int is_tmf, struct hisi_sas_tmf_task *tmf,
int *pass)
{
struct hisi_hba *hisi_hba = dq->hisi_hba;
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_sas_port *port;
struct hisi_sas_slot *slot;
struct hisi_sas_cmd_hdr *cmd_hdr_base;
struct asd_sas_port *sas_port = device->port;
struct device *dev = hisi_hba->dev;
int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
unsigned long flags;
if (!sas_port) {
struct task_status_struct *ts = &task->task_status;
ts->resp = SAS_TASK_UNDELIVERED;
ts->stat = SAS_PHY_DOWN;
/*
* libsas will use dev->port, should
* not call task_done for sata
*/
if (device->dev_type != SAS_SATA_DEV)
task->task_done(task);
return SAS_PHY_DOWN;
}
if (DEV_IS_GONE(sas_dev)) {
if (sas_dev)
dev_info(dev, "task prep: device %d not ready\n",
sas_dev->device_id);
else
dev_info(dev, "task prep: device %016llx not ready\n",
SAS_ADDR(device->sas_addr));
return SAS_PHY_DOWN;
}
port = to_hisi_sas_port(sas_port);
if (port && !port->port_attached) {
dev_info(dev, "task prep: %s port%d not attach device\n",
(dev_is_sata(device)) ?
"SATA/STP" : "SAS",
device->port->id);
return SAS_PHY_DOWN;
}
if (!sas_protocol_ata(task->task_proto)) {
if (task->num_scatter) {
n_elem = dma_map_sg(dev, task->scatter,
task->num_scatter, task->data_dir);
if (!n_elem) {
rc = -ENOMEM;
goto prep_out;
}
}
} else
n_elem = task->num_scatter;
spin_lock_irqsave(&hisi_hba->lock, flags);
if (hisi_hba->hw->slot_index_alloc)
rc = hisi_hba->hw->slot_index_alloc(hisi_hba, &slot_idx,
device);
else
rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
if (rc) {
spin_unlock_irqrestore(&hisi_hba->lock, flags);
goto err_out;
}
spin_unlock_irqrestore(&hisi_hba->lock, flags);
rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
if (rc)
goto err_out_tag;
dlvry_queue = dq->id;
dlvry_queue_slot = dq->wr_point;
slot = &hisi_hba->slot_info[slot_idx];
memset(slot, 0, sizeof(struct hisi_sas_slot));
slot->idx = slot_idx;
slot->n_elem = n_elem;
slot->dlvry_queue = dlvry_queue;
slot->dlvry_queue_slot = dlvry_queue_slot;
cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
slot->task = task;
slot->port = port;
task->lldd_task = slot;
INIT_WORK(&slot->abort_slot, hisi_sas_slot_abort);
slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
GFP_ATOMIC, &slot->buf_dma);
if (!slot->buf) {
rc = -ENOMEM;
goto err_out_slot_buf;
}
memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
switch (task->task_proto) {
case SAS_PROTOCOL_SMP:
rc = hisi_sas_task_prep_smp(hisi_hba, slot);
break;
case SAS_PROTOCOL_SSP:
rc = hisi_sas_task_prep_ssp(hisi_hba, slot, is_tmf, tmf);
break;
case SAS_PROTOCOL_SATA:
case SAS_PROTOCOL_STP:
case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
rc = hisi_sas_task_prep_ata(hisi_hba, slot);
break;
default:
dev_err(dev, "task prep: unknown/unsupported proto (0x%x)\n",
task->task_proto);
rc = -EINVAL;
break;
}
if (rc) {
dev_err(dev, "task prep: rc = 0x%x\n", rc);
goto err_out_buf;
}
spin_lock_irqsave(&hisi_hba->lock, flags);
list_add_tail(&slot->entry, &sas_dev->list);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&task->task_state_lock, flags);
dq->slot_prep = slot;
atomic64_inc(&sas_dev->running_req);
++(*pass);
return 0;
err_out_buf:
dma_pool_free(hisi_hba->buffer_pool, slot->buf,
slot->buf_dma);
err_out_slot_buf:
/* Nothing to be done */
err_out_tag:
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_slot_index_free(hisi_hba, slot_idx);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
err_out:
dev_err(dev, "task prep: failed[%d]!\n", rc);
if (!sas_protocol_ata(task->task_proto))
if (n_elem)
dma_unmap_sg(dev, task->scatter, n_elem,
task->data_dir);
prep_out:
return rc;
}
static int hisi_sas_task_exec(struct sas_task *task, gfp_t gfp_flags,
int is_tmf, struct hisi_sas_tmf_task *tmf)
{
u32 rc;
u32 pass = 0;
unsigned long flags;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
struct device *dev = hisi_hba->dev;
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_sas_dq *dq = sas_dev->dq;
if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
return -EINVAL;
/* protect task_prep and start_delivery sequence */
spin_lock_irqsave(&dq->lock, flags);
rc = hisi_sas_task_prep(task, dq, is_tmf, tmf, &pass);
if (rc)
dev_err(dev, "task exec: failed[%d]!\n", rc);
if (likely(pass))
hisi_hba->hw->start_delivery(dq);
spin_unlock_irqrestore(&dq->lock, flags);
return rc;
}
static void hisi_sas_bytes_dmaed(struct hisi_hba *hisi_hba, int phy_no)
{
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
struct sas_ha_struct *sas_ha;
if (!phy->phy_attached)
return;
sas_ha = &hisi_hba->sha;
sas_ha->notify_phy_event(sas_phy, PHYE_OOB_DONE);
if (sas_phy->phy) {
struct sas_phy *sphy = sas_phy->phy;
sphy->negotiated_linkrate = sas_phy->linkrate;
sphy->minimum_linkrate_hw = SAS_LINK_RATE_1_5_GBPS;
sphy->maximum_linkrate_hw =
hisi_hba->hw->phy_get_max_linkrate();
if (sphy->minimum_linkrate == SAS_LINK_RATE_UNKNOWN)
sphy->minimum_linkrate = phy->minimum_linkrate;
if (sphy->maximum_linkrate == SAS_LINK_RATE_UNKNOWN)
sphy->maximum_linkrate = phy->maximum_linkrate;
}
if (phy->phy_type & PORT_TYPE_SAS) {
struct sas_identify_frame *id;
id = (struct sas_identify_frame *)phy->frame_rcvd;
id->dev_type = phy->identify.device_type;
id->initiator_bits = SAS_PROTOCOL_ALL;
id->target_bits = phy->identify.target_port_protocols;
} else if (phy->phy_type & PORT_TYPE_SATA) {
/*Nothing*/
}
sas_phy->frame_rcvd_size = phy->frame_rcvd_size;
sas_ha->notify_port_event(sas_phy, PORTE_BYTES_DMAED);
}
static struct hisi_sas_device *hisi_sas_alloc_dev(struct domain_device *device)
{
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct hisi_sas_device *sas_dev = NULL;
unsigned long flags;
int i;
spin_lock_irqsave(&hisi_hba->lock, flags);
for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
if (hisi_hba->devices[i].dev_type == SAS_PHY_UNUSED) {
int queue = i % hisi_hba->queue_count;
struct hisi_sas_dq *dq = &hisi_hba->dq[queue];
hisi_hba->devices[i].device_id = i;
sas_dev = &hisi_hba->devices[i];
sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
sas_dev->dev_type = device->dev_type;
sas_dev->hisi_hba = hisi_hba;
sas_dev->sas_device = device;
sas_dev->dq = dq;
INIT_LIST_HEAD(&hisi_hba->devices[i].list);
break;
}
}
spin_unlock_irqrestore(&hisi_hba->lock, flags);
return sas_dev;
}
static int hisi_sas_dev_found(struct domain_device *device)
{
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct domain_device *parent_dev = device->parent;
struct hisi_sas_device *sas_dev;
struct device *dev = hisi_hba->dev;
if (hisi_hba->hw->alloc_dev)
sas_dev = hisi_hba->hw->alloc_dev(device);
else
sas_dev = hisi_sas_alloc_dev(device);
if (!sas_dev) {
dev_err(dev, "fail alloc dev: max support %d devices\n",
HISI_SAS_MAX_DEVICES);
return -EINVAL;
}
device->lldd_dev = sas_dev;
hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type)) {
int phy_no;
u8 phy_num = parent_dev->ex_dev.num_phys;
struct ex_phy *phy;
for (phy_no = 0; phy_no < phy_num; phy_no++) {
phy = &parent_dev->ex_dev.ex_phy[phy_no];
if (SAS_ADDR(phy->attached_sas_addr) ==
SAS_ADDR(device->sas_addr)) {
sas_dev->attached_phy = phy_no;
break;
}
}
if (phy_no == phy_num) {
dev_info(dev, "dev found: no attached "
"dev:%016llx at ex:%016llx\n",
SAS_ADDR(device->sas_addr),
SAS_ADDR(parent_dev->sas_addr));
return -EINVAL;
}
}
return 0;
}
static int hisi_sas_slave_configure(struct scsi_device *sdev)
{
struct domain_device *dev = sdev_to_domain_dev(sdev);
int ret = sas_slave_configure(sdev);
if (ret)
return ret;
if (!dev_is_sata(dev))
sas_change_queue_depth(sdev, 64);
return 0;
}
static void hisi_sas_scan_start(struct Scsi_Host *shost)
{
struct hisi_hba *hisi_hba = shost_priv(shost);
hisi_hba->hw->phys_init(hisi_hba);
}
static int hisi_sas_scan_finished(struct Scsi_Host *shost, unsigned long time)
{
struct hisi_hba *hisi_hba = shost_priv(shost);
struct sas_ha_struct *sha = &hisi_hba->sha;
/* Wait for PHY up interrupt to occur */
if (time < HZ)
return 0;
sas_drain_work(sha);
return 1;
}
static void hisi_sas_phyup_work(struct work_struct *work)
{
struct hisi_sas_phy *phy =
container_of(work, struct hisi_sas_phy, phyup_ws);
struct hisi_hba *hisi_hba = phy->hisi_hba;
struct asd_sas_phy *sas_phy = &phy->sas_phy;
int phy_no = sas_phy->id;
hisi_hba->hw->sl_notify(hisi_hba, phy_no); /* This requires a sleep */
hisi_sas_bytes_dmaed(hisi_hba, phy_no);
}
static void hisi_sas_phy_init(struct hisi_hba *hisi_hba, int phy_no)
{
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
phy->hisi_hba = hisi_hba;
phy->port = NULL;
sas_phy->enabled = (phy_no < hisi_hba->n_phy) ? 1 : 0;
sas_phy->class = SAS;
sas_phy->iproto = SAS_PROTOCOL_ALL;
sas_phy->tproto = 0;
sas_phy->type = PHY_TYPE_PHYSICAL;
sas_phy->role = PHY_ROLE_INITIATOR;
sas_phy->oob_mode = OOB_NOT_CONNECTED;
sas_phy->linkrate = SAS_LINK_RATE_UNKNOWN;
sas_phy->id = phy_no;
sas_phy->sas_addr = &hisi_hba->sas_addr[0];
sas_phy->frame_rcvd = &phy->frame_rcvd[0];
sas_phy->ha = (struct sas_ha_struct *)hisi_hba->shost->hostdata;
sas_phy->lldd_phy = phy;
INIT_WORK(&phy->phyup_ws, hisi_sas_phyup_work);
}
static void hisi_sas_port_notify_formed(struct asd_sas_phy *sas_phy)
{
struct sas_ha_struct *sas_ha = sas_phy->ha;
struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
struct hisi_sas_phy *phy = sas_phy->lldd_phy;
struct asd_sas_port *sas_port = sas_phy->port;
struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
unsigned long flags;
if (!sas_port)
return;
spin_lock_irqsave(&hisi_hba->lock, flags);
port->port_attached = 1;
port->id = phy->port_id;
phy->port = port;
sas_port->lldd_port = port;
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
static void hisi_sas_do_release_task(struct hisi_hba *hisi_hba, struct sas_task *task,
struct hisi_sas_slot *slot)
{
if (task) {
unsigned long flags;
struct task_status_struct *ts;
ts = &task->task_status;
ts->resp = SAS_TASK_COMPLETE;
ts->stat = SAS_ABORTED_TASK;
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags &=
~(SAS_TASK_STATE_PENDING | SAS_TASK_AT_INITIATOR);
task->task_state_flags |= SAS_TASK_STATE_DONE;
spin_unlock_irqrestore(&task->task_state_lock, flags);
}
hisi_sas_slot_task_free(hisi_hba, task, slot);
}
/* hisi_hba.lock should be locked */
static void hisi_sas_release_task(struct hisi_hba *hisi_hba,
struct domain_device *device)
{
struct hisi_sas_slot *slot, *slot2;
struct hisi_sas_device *sas_dev = device->lldd_dev;
list_for_each_entry_safe(slot, slot2, &sas_dev->list, entry)
hisi_sas_do_release_task(hisi_hba, slot->task, slot);
}
static void hisi_sas_release_tasks(struct hisi_hba *hisi_hba)
{
struct hisi_sas_device *sas_dev;
struct domain_device *device;
int i;
for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
sas_dev = &hisi_hba->devices[i];
device = sas_dev->sas_device;
if ((sas_dev->dev_type == SAS_PHY_UNUSED) ||
!device)
continue;
hisi_sas_release_task(hisi_hba, device);
}
}
static void hisi_sas_dereg_device(struct hisi_hba *hisi_hba,
struct domain_device *device)
{
if (hisi_hba->hw->dereg_device)
hisi_hba->hw->dereg_device(hisi_hba, device);
}
static void hisi_sas_dev_gone(struct domain_device *device)
{
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
dev_info(dev, "found dev[%d:%x] is gone\n",
sas_dev->device_id, sas_dev->dev_type);
hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_DEV, 0);
hisi_sas_dereg_device(hisi_hba, device);
hisi_hba->hw->free_device(hisi_hba, sas_dev);
device->lldd_dev = NULL;
memset(sas_dev, 0, sizeof(*sas_dev));
sas_dev->dev_type = SAS_PHY_UNUSED;
}
static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags)
{
return hisi_sas_task_exec(task, gfp_flags, 0, NULL);
}
static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
void *funcdata)
{
struct sas_ha_struct *sas_ha = sas_phy->ha;
struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
int phy_no = sas_phy->id;
switch (func) {
case PHY_FUNC_HARD_RESET:
hisi_hba->hw->phy_hard_reset(hisi_hba, phy_no);
break;
case PHY_FUNC_LINK_RESET:
hisi_hba->hw->phy_disable(hisi_hba, phy_no);
msleep(100);
hisi_hba->hw->phy_start(hisi_hba, phy_no);
break;
case PHY_FUNC_DISABLE:
hisi_hba->hw->phy_disable(hisi_hba, phy_no);
break;
case PHY_FUNC_SET_LINK_RATE:
hisi_hba->hw->phy_set_linkrate(hisi_hba, phy_no, funcdata);
break;
case PHY_FUNC_GET_EVENTS:
if (hisi_hba->hw->get_events) {
hisi_hba->hw->get_events(hisi_hba, phy_no);
break;
}
/* fallthru */
case PHY_FUNC_RELEASE_SPINUP_HOLD:
default:
return -EOPNOTSUPP;
}
return 0;
}
static void hisi_sas_task_done(struct sas_task *task)
{
if (!del_timer(&task->slow_task->timer))
return;
complete(&task->slow_task->completion);
}
static void hisi_sas_tmf_timedout(struct timer_list *t)
{
struct sas_task_slow *slow = from_timer(slow, t, timer);
struct sas_task *task = slow->task;
unsigned long flags;
spin_lock_irqsave(&task->task_state_lock, flags);
if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
task->task_state_flags |= SAS_TASK_STATE_ABORTED;
spin_unlock_irqrestore(&task->task_state_lock, flags);
complete(&task->slow_task->completion);
}
#define TASK_TIMEOUT 20
#define TASK_RETRY 3
static int hisi_sas_exec_internal_tmf_task(struct domain_device *device,
void *parameter, u32 para_len,
struct hisi_sas_tmf_task *tmf)
{
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = sas_dev->hisi_hba;
struct device *dev = hisi_hba->dev;
struct sas_task *task;
int res, retry;
for (retry = 0; retry < TASK_RETRY; retry++) {
task = sas_alloc_slow_task(GFP_KERNEL);
if (!task)
return -ENOMEM;
task->dev = device;
task->task_proto = device->tproto;
if (dev_is_sata(device)) {
task->ata_task.device_control_reg_update = 1;
memcpy(&task->ata_task.fis, parameter, para_len);
} else {
memcpy(&task->ssp_task, parameter, para_len);
}
task->task_done = hisi_sas_task_done;
task->slow_task->timer.function = hisi_sas_tmf_timedout;
task->slow_task->timer.expires = jiffies + TASK_TIMEOUT*HZ;
add_timer(&task->slow_task->timer);
res = hisi_sas_task_exec(task, GFP_KERNEL, 1, tmf);
if (res) {
del_timer(&task->slow_task->timer);
dev_err(dev, "abort tmf: executing internal task failed: %d\n",
res);
goto ex_err;
}
wait_for_completion(&task->slow_task->completion);
res = TMF_RESP_FUNC_FAILED;
/* Even TMF timed out, return direct. */
if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
struct hisi_sas_slot *slot = task->lldd_task;
dev_err(dev, "abort tmf: TMF task timeout\n");
if (slot)
slot->task = NULL;
goto ex_err;
}
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
res = TMF_RESP_FUNC_COMPLETE;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == TMF_RESP_FUNC_SUCC) {
res = TMF_RESP_FUNC_SUCC;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_UNDERRUN) {
/* no error, but return the number of bytes of
* underrun
*/
dev_warn(dev, "abort tmf: task to dev %016llx "
"resp: 0x%x sts 0x%x underrun\n",
SAS_ADDR(device->sas_addr),
task->task_status.resp,
task->task_status.stat);
res = task->task_status.residual;
break;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == SAS_DATA_OVERRUN) {
dev_warn(dev, "abort tmf: blocked task error\n");
res = -EMSGSIZE;
break;
}
dev_warn(dev, "abort tmf: task to dev "
"%016llx resp: 0x%x status 0x%x\n",
SAS_ADDR(device->sas_addr), task->task_status.resp,
task->task_status.stat);
sas_free_task(task);
task = NULL;
}
ex_err:
if (retry == TASK_RETRY)
dev_warn(dev, "abort tmf: executing internal task failed!\n");
sas_free_task(task);
return res;
}
static void hisi_sas_fill_ata_reset_cmd(struct ata_device *dev,
bool reset, int pmp, u8 *fis)
{
struct ata_taskfile tf;
ata_tf_init(dev, &tf);
if (reset)
tf.ctl |= ATA_SRST;
else
tf.ctl &= ~ATA_SRST;
tf.command = ATA_CMD_DEV_RESET;
ata_tf_to_fis(&tf, pmp, 0, fis);
}
static int hisi_sas_softreset_ata_disk(struct domain_device *device)
{
u8 fis[20] = {0};
struct ata_port *ap = device->sata_dev.ap;
struct ata_link *link;
int rc = TMF_RESP_FUNC_FAILED;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
int s = sizeof(struct host_to_dev_fis);
unsigned long flags;
ata_for_each_link(link, ap, EDGE) {
int pmp = sata_srst_pmp(link);
hisi_sas_fill_ata_reset_cmd(link->device, 1, pmp, fis);
rc = hisi_sas_exec_internal_tmf_task(device, fis, s, NULL);
if (rc != TMF_RESP_FUNC_COMPLETE)
break;
}
if (rc == TMF_RESP_FUNC_COMPLETE) {
ata_for_each_link(link, ap, EDGE) {
int pmp = sata_srst_pmp(link);
hisi_sas_fill_ata_reset_cmd(link->device, 0, pmp, fis);
rc = hisi_sas_exec_internal_tmf_task(device, fis,
s, NULL);
if (rc != TMF_RESP_FUNC_COMPLETE)
dev_err(dev, "ata disk de-reset failed\n");
}
} else {
dev_err(dev, "ata disk reset failed\n");
}
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
return rc;
}
static int hisi_sas_debug_issue_ssp_tmf(struct domain_device *device,
u8 *lun, struct hisi_sas_tmf_task *tmf)
{
struct sas_ssp_task ssp_task;
if (!(device->tproto & SAS_PROTOCOL_SSP))
return TMF_RESP_FUNC_ESUPP;
memcpy(ssp_task.LUN, lun, 8);
return hisi_sas_exec_internal_tmf_task(device, &ssp_task,
sizeof(ssp_task), tmf);
}
static void hisi_sas_refresh_port_id(struct hisi_hba *hisi_hba,
struct asd_sas_port *sas_port, enum sas_linkrate linkrate)
{
struct hisi_sas_device *sas_dev;
struct domain_device *device;
int i;
for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
sas_dev = &hisi_hba->devices[i];
device = sas_dev->sas_device;
if ((sas_dev->dev_type == SAS_PHY_UNUSED)
|| !device || (device->port != sas_port))
continue;
hisi_hba->hw->free_device(hisi_hba, sas_dev);
/* Update linkrate of directly attached device. */
if (!device->parent)
device->linkrate = linkrate;
hisi_hba->hw->setup_itct(hisi_hba, sas_dev);
}
}
static void hisi_sas_rescan_topology(struct hisi_hba *hisi_hba, u32 old_state,
u32 state)
{
struct sas_ha_struct *sas_ha = &hisi_hba->sha;
struct asd_sas_port *_sas_port = NULL;
int phy_no;
for (phy_no = 0; phy_no < hisi_hba->n_phy; phy_no++) {
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
struct asd_sas_port *sas_port = sas_phy->port;
struct hisi_sas_port *port = to_hisi_sas_port(sas_port);
bool do_port_check = !!(_sas_port != sas_port);
if (!sas_phy->phy->enabled)
continue;
/* Report PHY state change to libsas */
if (state & (1 << phy_no)) {
if (do_port_check && sas_port) {
struct domain_device *dev = sas_port->port_dev;
_sas_port = sas_port;
port->id = phy->port_id;
hisi_sas_refresh_port_id(hisi_hba,
sas_port, sas_phy->linkrate);
if (DEV_IS_EXPANDER(dev->dev_type))
sas_ha->notify_port_event(sas_phy,
PORTE_BROADCAST_RCVD);
}
} else if (old_state & (1 << phy_no))
/* PHY down but was up before */
hisi_sas_phy_down(hisi_hba, phy_no, 0);
}
drain_workqueue(hisi_hba->shost->work_q);
}
static int hisi_sas_controller_reset(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
struct Scsi_Host *shost = hisi_hba->shost;
u32 old_state, state;
unsigned long flags;
int rc;
if (!hisi_hba->hw->soft_reset)
return -1;
if (test_and_set_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags))
return -1;
dev_dbg(dev, "controller resetting...\n");
old_state = hisi_hba->hw->get_phys_state(hisi_hba);
scsi_block_requests(shost);
set_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
rc = hisi_hba->hw->soft_reset(hisi_hba);
if (rc) {
dev_warn(dev, "controller reset failed (%d)\n", rc);
clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
goto out;
}
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_tasks(hisi_hba);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
clear_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags);
/* Init and wait for PHYs to come up and all libsas event finished. */
hisi_hba->hw->phys_init(hisi_hba);
msleep(1000);
drain_workqueue(hisi_hba->wq);
drain_workqueue(shost->work_q);
state = hisi_hba->hw->get_phys_state(hisi_hba);
hisi_sas_rescan_topology(hisi_hba, old_state, state);
dev_dbg(dev, "controller reset complete\n");
out:
scsi_unblock_requests(shost);
clear_bit(HISI_SAS_RESET_BIT, &hisi_hba->flags);
return rc;
}
static int hisi_sas_abort_task(struct sas_task *task)
{
struct scsi_lun lun;
struct hisi_sas_tmf_task tmf_task;
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(task->dev);
struct device *dev = hisi_hba->dev;
int rc = TMF_RESP_FUNC_FAILED;
unsigned long flags;
if (!sas_dev) {
dev_warn(dev, "Device has been removed\n");
return TMF_RESP_FUNC_FAILED;
}
if (task->task_state_flags & SAS_TASK_STATE_DONE) {
rc = TMF_RESP_FUNC_COMPLETE;
goto out;
}
sas_dev->dev_status = HISI_SAS_DEV_EH;
if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
struct scsi_cmnd *cmnd = task->uldd_task;
struct hisi_sas_slot *slot = task->lldd_task;
u32 tag = slot->idx;
int rc2;
int_to_scsilun(cmnd->device->lun, &lun);
tmf_task.tmf = TMF_ABORT_TASK;
tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
rc = hisi_sas_debug_issue_ssp_tmf(task->dev, lun.scsi_lun,
&tmf_task);
rc2 = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_CMD, tag);
/*
* If the TMF finds that the IO is not in the device and also
* the internal abort does not succeed, then it is safe to
* free the slot.
* Note: if the internal abort succeeds then the slot
* will have already been completed
*/
if (rc == TMF_RESP_FUNC_COMPLETE && rc2 != TMF_RESP_FUNC_SUCC) {
if (task->lldd_task) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_do_release_task(hisi_hba, task, slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
} else if (task->task_proto & SAS_PROTOCOL_SATA ||
task->task_proto & SAS_PROTOCOL_STP) {
if (task->dev->dev_type == SAS_SATA_DEV) {
hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_DEV, 0);
hisi_sas_dereg_device(hisi_hba, device);
rc = hisi_sas_softreset_ata_disk(device);
}
} else if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SMP) {
/* SMP */
struct hisi_sas_slot *slot = task->lldd_task;
u32 tag = slot->idx;
rc = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_CMD, tag);
if (rc == TMF_RESP_FUNC_FAILED && task->lldd_task) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_do_release_task(hisi_hba, task, slot);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
out:
if (rc != TMF_RESP_FUNC_COMPLETE)
dev_notice(dev, "abort task: rc=%d\n", rc);
return rc;
}
static int hisi_sas_abort_task_set(struct domain_device *device, u8 *lun)
{
struct hisi_sas_tmf_task tmf_task;
int rc = TMF_RESP_FUNC_FAILED;
tmf_task.tmf = TMF_ABORT_TASK_SET;
rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
return rc;
}
static int hisi_sas_clear_aca(struct domain_device *device, u8 *lun)
{
int rc = TMF_RESP_FUNC_FAILED;
struct hisi_sas_tmf_task tmf_task;
tmf_task.tmf = TMF_CLEAR_ACA;
rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
return rc;
}
static int hisi_sas_debug_I_T_nexus_reset(struct domain_device *device)
{
struct sas_phy *phy = sas_get_local_phy(device);
int rc, reset_type = (device->dev_type == SAS_SATA_DEV ||
(device->tproto & SAS_PROTOCOL_STP)) ? 0 : 1;
rc = sas_phy_reset(phy, reset_type);
sas_put_local_phy(phy);
msleep(2000);
return rc;
}
static int hisi_sas_I_T_nexus_reset(struct domain_device *device)
{
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
unsigned long flags;
int rc = TMF_RESP_FUNC_FAILED;
if (sas_dev->dev_status != HISI_SAS_DEV_EH)
return TMF_RESP_FUNC_FAILED;
sas_dev->dev_status = HISI_SAS_DEV_NORMAL;
hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_DEV, 0);
hisi_sas_dereg_device(hisi_hba, device);
rc = hisi_sas_debug_I_T_nexus_reset(device);
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
return rc;
}
static int hisi_sas_lu_reset(struct domain_device *device, u8 *lun)
{
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_hba *hisi_hba = dev_to_hisi_hba(device);
struct device *dev = hisi_hba->dev;
unsigned long flags;
int rc = TMF_RESP_FUNC_FAILED;
sas_dev->dev_status = HISI_SAS_DEV_EH;
if (dev_is_sata(device)) {
struct sas_phy *phy;
/* Clear internal IO and then hardreset */
rc = hisi_sas_internal_task_abort(hisi_hba, device,
HISI_SAS_INT_ABT_DEV, 0);
if (rc == TMF_RESP_FUNC_FAILED)
goto out;
hisi_sas_dereg_device(hisi_hba, device);
phy = sas_get_local_phy(device);
rc = sas_phy_reset(phy, 1);
if (rc == 0) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
sas_put_local_phy(phy);
} else {
struct hisi_sas_tmf_task tmf_task = { .tmf = TMF_LU_RESET };
rc = hisi_sas_debug_issue_ssp_tmf(device, lun, &tmf_task);
if (rc == TMF_RESP_FUNC_COMPLETE) {
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_release_task(hisi_hba, device);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
}
}
out:
if (rc != TMF_RESP_FUNC_COMPLETE)
dev_err(dev, "lu_reset: for device[%d]:rc= %d\n",
sas_dev->device_id, rc);
return rc;
}
static int hisi_sas_clear_nexus_ha(struct sas_ha_struct *sas_ha)
{
struct hisi_hba *hisi_hba = sas_ha->lldd_ha;
return hisi_sas_controller_reset(hisi_hba);
}
static int hisi_sas_query_task(struct sas_task *task)
{
struct scsi_lun lun;
struct hisi_sas_tmf_task tmf_task;
int rc = TMF_RESP_FUNC_FAILED;
if (task->lldd_task && task->task_proto & SAS_PROTOCOL_SSP) {
struct scsi_cmnd *cmnd = task->uldd_task;
struct domain_device *device = task->dev;
struct hisi_sas_slot *slot = task->lldd_task;
u32 tag = slot->idx;
int_to_scsilun(cmnd->device->lun, &lun);
tmf_task.tmf = TMF_QUERY_TASK;
tmf_task.tag_of_task_to_be_managed = cpu_to_le16(tag);
rc = hisi_sas_debug_issue_ssp_tmf(device,
lun.scsi_lun,
&tmf_task);
switch (rc) {
/* The task is still in Lun, release it then */
case TMF_RESP_FUNC_SUCC:
/* The task is not in Lun or failed, reset the phy */
case TMF_RESP_FUNC_FAILED:
case TMF_RESP_FUNC_COMPLETE:
break;
default:
rc = TMF_RESP_FUNC_FAILED;
break;
}
}
return rc;
}
static int
hisi_sas_internal_abort_task_exec(struct hisi_hba *hisi_hba, int device_id,
struct sas_task *task, int abort_flag,
int task_tag)
{
struct domain_device *device = task->dev;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct device *dev = hisi_hba->dev;
struct hisi_sas_port *port;
struct hisi_sas_slot *slot;
struct asd_sas_port *sas_port = device->port;
struct hisi_sas_cmd_hdr *cmd_hdr_base;
struct hisi_sas_dq *dq = sas_dev->dq;
int dlvry_queue_slot, dlvry_queue, n_elem = 0, rc, slot_idx;
unsigned long flags, flags_dq;
if (unlikely(test_bit(HISI_SAS_REJECT_CMD_BIT, &hisi_hba->flags)))
return -EINVAL;
if (!device->port)
return -1;
port = to_hisi_sas_port(sas_port);
/* simply get a slot and send abort command */
spin_lock_irqsave(&hisi_hba->lock, flags);
rc = hisi_sas_slot_index_alloc(hisi_hba, &slot_idx);
if (rc) {
spin_unlock_irqrestore(&hisi_hba->lock, flags);
goto err_out;
}
spin_unlock_irqrestore(&hisi_hba->lock, flags);
spin_lock_irqsave(&dq->lock, flags_dq);
rc = hisi_hba->hw->get_free_slot(hisi_hba, dq);
if (rc)
goto err_out_tag;
dlvry_queue = dq->id;
dlvry_queue_slot = dq->wr_point;
slot = &hisi_hba->slot_info[slot_idx];
memset(slot, 0, sizeof(struct hisi_sas_slot));
slot->idx = slot_idx;
slot->n_elem = n_elem;
slot->dlvry_queue = dlvry_queue;
slot->dlvry_queue_slot = dlvry_queue_slot;
cmd_hdr_base = hisi_hba->cmd_hdr[dlvry_queue];
slot->cmd_hdr = &cmd_hdr_base[dlvry_queue_slot];
slot->task = task;
slot->port = port;
task->lldd_task = slot;
slot->buf = dma_pool_alloc(hisi_hba->buffer_pool,
GFP_ATOMIC, &slot->buf_dma);
if (!slot->buf) {
rc = -ENOMEM;
goto err_out_tag;
}
memset(slot->cmd_hdr, 0, sizeof(struct hisi_sas_cmd_hdr));
memset(hisi_sas_cmd_hdr_addr_mem(slot), 0, HISI_SAS_COMMAND_TABLE_SZ);
memset(hisi_sas_status_buf_addr_mem(slot), 0, HISI_SAS_STATUS_BUF_SZ);
rc = hisi_sas_task_prep_abort(hisi_hba, slot, device_id,
abort_flag, task_tag);
if (rc)
goto err_out_buf;
spin_lock_irqsave(&hisi_hba->lock, flags);
list_add_tail(&slot->entry, &sas_dev->list);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
spin_lock_irqsave(&task->task_state_lock, flags);
task->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock_irqrestore(&task->task_state_lock, flags);
dq->slot_prep = slot;
atomic64_inc(&sas_dev->running_req);
/* send abort command to the chip */
hisi_hba->hw->start_delivery(dq);
spin_unlock_irqrestore(&dq->lock, flags_dq);
return 0;
err_out_buf:
dma_pool_free(hisi_hba->buffer_pool, slot->buf,
slot->buf_dma);
err_out_tag:
spin_lock_irqsave(&hisi_hba->lock, flags);
hisi_sas_slot_index_free(hisi_hba, slot_idx);
spin_unlock_irqrestore(&hisi_hba->lock, flags);
spin_unlock_irqrestore(&dq->lock, flags_dq);
err_out:
dev_err(dev, "internal abort task prep: failed[%d]!\n", rc);
return rc;
}
/**
* hisi_sas_internal_task_abort -- execute an internal
* abort command for single IO command or a device
* @hisi_hba: host controller struct
* @device: domain device
* @abort_flag: mode of operation, device or single IO
* @tag: tag of IO to be aborted (only relevant to single
* IO mode)
*/
static int
hisi_sas_internal_task_abort(struct hisi_hba *hisi_hba,
struct domain_device *device,
int abort_flag, int tag)
{
struct sas_task *task;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct device *dev = hisi_hba->dev;
int res;
if (!hisi_hba->hw->prep_abort)
return -EOPNOTSUPP;
task = sas_alloc_slow_task(GFP_KERNEL);
if (!task)
return -ENOMEM;
task->dev = device;
task->task_proto = device->tproto;
task->task_done = hisi_sas_task_done;
task->slow_task->timer.function = hisi_sas_tmf_timedout;
task->slow_task->timer.expires = jiffies + msecs_to_jiffies(110);
add_timer(&task->slow_task->timer);
res = hisi_sas_internal_abort_task_exec(hisi_hba, sas_dev->device_id,
task, abort_flag, tag);
if (res) {
del_timer(&task->slow_task->timer);
dev_err(dev, "internal task abort: executing internal task failed: %d\n",
res);
goto exit;
}
wait_for_completion(&task->slow_task->completion);
res = TMF_RESP_FUNC_FAILED;
/* Internal abort timed out */
if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
struct hisi_sas_slot *slot = task->lldd_task;
if (slot)
slot->task = NULL;
dev_err(dev, "internal task abort: timeout.\n");
goto exit;
}
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == TMF_RESP_FUNC_COMPLETE) {
res = TMF_RESP_FUNC_COMPLETE;
goto exit;
}
if (task->task_status.resp == SAS_TASK_COMPLETE &&
task->task_status.stat == TMF_RESP_FUNC_SUCC) {
res = TMF_RESP_FUNC_SUCC;
goto exit;
}
exit:
dev_dbg(dev, "internal task abort: task to dev %016llx task=%p "
"resp: 0x%x sts 0x%x\n",
SAS_ADDR(device->sas_addr),
task,
task->task_status.resp, /* 0 is complete, -1 is undelivered */
task->task_status.stat);
sas_free_task(task);
return res;
}
static void hisi_sas_port_formed(struct asd_sas_phy *sas_phy)
{
hisi_sas_port_notify_formed(sas_phy);
}
static void hisi_sas_phy_disconnected(struct hisi_sas_phy *phy)
{
phy->phy_attached = 0;
phy->phy_type = 0;
phy->port = NULL;
}
void hisi_sas_phy_down(struct hisi_hba *hisi_hba, int phy_no, int rdy)
{
struct hisi_sas_phy *phy = &hisi_hba->phy[phy_no];
struct asd_sas_phy *sas_phy = &phy->sas_phy;
struct sas_ha_struct *sas_ha = &hisi_hba->sha;
if (rdy) {
/* Phy down but ready */
hisi_sas_bytes_dmaed(hisi_hba, phy_no);
hisi_sas_port_notify_formed(sas_phy);
} else {
struct hisi_sas_port *port = phy->port;
/* Phy down and not ready */
sas_ha->notify_phy_event(sas_phy, PHYE_LOSS_OF_SIGNAL);
sas_phy_disconnected(sas_phy);
if (port) {
if (phy->phy_type & PORT_TYPE_SAS) {
int port_id = port->id;
if (!hisi_hba->hw->get_wideport_bitmap(hisi_hba,
port_id))
port->port_attached = 0;
} else if (phy->phy_type & PORT_TYPE_SATA)
port->port_attached = 0;
}
hisi_sas_phy_disconnected(phy);
}
}
EXPORT_SYMBOL_GPL(hisi_sas_phy_down);
void hisi_sas_kill_tasklets(struct hisi_hba *hisi_hba)
{
int i;
for (i = 0; i < hisi_hba->queue_count; i++) {
struct hisi_sas_cq *cq = &hisi_hba->cq[i];
tasklet_kill(&cq->tasklet);
}
}
EXPORT_SYMBOL_GPL(hisi_sas_kill_tasklets);
struct scsi_transport_template *hisi_sas_stt;
EXPORT_SYMBOL_GPL(hisi_sas_stt);
static struct scsi_host_template _hisi_sas_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.queuecommand = sas_queuecommand,
.target_alloc = sas_target_alloc,
.slave_configure = hisi_sas_slave_configure,
.scan_finished = hisi_sas_scan_finished,
.scan_start = hisi_sas_scan_start,
.change_queue_depth = sas_change_queue_depth,
.bios_param = sas_bios_param,
.can_queue = 1,
.this_id = -1,
.sg_tablesize = SG_ALL,
.max_sectors = SCSI_DEFAULT_MAX_SECTORS,
.use_clustering = ENABLE_CLUSTERING,
.eh_device_reset_handler = sas_eh_device_reset_handler,
.eh_target_reset_handler = sas_eh_target_reset_handler,
.target_destroy = sas_target_destroy,
.ioctl = sas_ioctl,
};
struct scsi_host_template *hisi_sas_sht = &_hisi_sas_sht;
EXPORT_SYMBOL_GPL(hisi_sas_sht);
static struct sas_domain_function_template hisi_sas_transport_ops = {
.lldd_dev_found = hisi_sas_dev_found,
.lldd_dev_gone = hisi_sas_dev_gone,
.lldd_execute_task = hisi_sas_queue_command,
.lldd_control_phy = hisi_sas_control_phy,
.lldd_abort_task = hisi_sas_abort_task,
.lldd_abort_task_set = hisi_sas_abort_task_set,
.lldd_clear_aca = hisi_sas_clear_aca,
.lldd_I_T_nexus_reset = hisi_sas_I_T_nexus_reset,
.lldd_lu_reset = hisi_sas_lu_reset,
.lldd_query_task = hisi_sas_query_task,
.lldd_clear_nexus_ha = hisi_sas_clear_nexus_ha,
.lldd_port_formed = hisi_sas_port_formed,
};
void hisi_sas_init_mem(struct hisi_hba *hisi_hba)
{
int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
for (i = 0; i < hisi_hba->queue_count; i++) {
struct hisi_sas_cq *cq = &hisi_hba->cq[i];
struct hisi_sas_dq *dq = &hisi_hba->dq[i];
s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
memset(hisi_hba->cmd_hdr[i], 0, s);
dq->wr_point = 0;
s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
memset(hisi_hba->complete_hdr[i], 0, s);
cq->rd_point = 0;
}
s = sizeof(struct hisi_sas_initial_fis) * hisi_hba->n_phy;
memset(hisi_hba->initial_fis, 0, s);
s = max_command_entries * sizeof(struct hisi_sas_iost);
memset(hisi_hba->iost, 0, s);
s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
memset(hisi_hba->breakpoint, 0, s);
s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
memset(hisi_hba->sata_breakpoint, 0, s);
}
EXPORT_SYMBOL_GPL(hisi_sas_init_mem);
int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
{
struct device *dev = hisi_hba->dev;
int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
spin_lock_init(&hisi_hba->lock);
for (i = 0; i < hisi_hba->n_phy; i++) {
hisi_sas_phy_init(hisi_hba, i);
hisi_hba->port[i].port_attached = 0;
hisi_hba->port[i].id = -1;
}
for (i = 0; i < HISI_SAS_MAX_DEVICES; i++) {
hisi_hba->devices[i].dev_type = SAS_PHY_UNUSED;
hisi_hba->devices[i].device_id = i;
hisi_hba->devices[i].dev_status = HISI_SAS_DEV_NORMAL;
}
for (i = 0; i < hisi_hba->queue_count; i++) {
struct hisi_sas_cq *cq = &hisi_hba->cq[i];
struct hisi_sas_dq *dq = &hisi_hba->dq[i];
/* Completion queue structure */
cq->id = i;
cq->hisi_hba = hisi_hba;
/* Delivery queue structure */
dq->id = i;
dq->hisi_hba = hisi_hba;
/* Delivery queue */
s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
hisi_hba->cmd_hdr[i] = dma_alloc_coherent(dev, s,
&hisi_hba->cmd_hdr_dma[i], GFP_KERNEL);
if (!hisi_hba->cmd_hdr[i])
goto err_out;
/* Completion queue */
s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
hisi_hba->complete_hdr[i] = dma_alloc_coherent(dev, s,
&hisi_hba->complete_hdr_dma[i], GFP_KERNEL);
if (!hisi_hba->complete_hdr[i])
goto err_out;
}
s = sizeof(struct hisi_sas_slot_buf_table);
hisi_hba->buffer_pool = dma_pool_create("dma_buffer", dev, s, 16, 0);
if (!hisi_hba->buffer_pool)
goto err_out;
s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
hisi_hba->itct = dma_alloc_coherent(dev, s, &hisi_hba->itct_dma,
GFP_KERNEL);
if (!hisi_hba->itct)
goto err_out;
memset(hisi_hba->itct, 0, s);
hisi_hba->slot_info = devm_kcalloc(dev, max_command_entries,
sizeof(struct hisi_sas_slot),
GFP_KERNEL);
if (!hisi_hba->slot_info)
goto err_out;
s = max_command_entries * sizeof(struct hisi_sas_iost);
hisi_hba->iost = dma_alloc_coherent(dev, s, &hisi_hba->iost_dma,
GFP_KERNEL);
if (!hisi_hba->iost)
goto err_out;
s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
hisi_hba->breakpoint = dma_alloc_coherent(dev, s,
&hisi_hba->breakpoint_dma, GFP_KERNEL);
if (!hisi_hba->breakpoint)
goto err_out;
hisi_hba->slot_index_count = max_command_entries;
s = hisi_hba->slot_index_count / BITS_PER_BYTE;
hisi_hba->slot_index_tags = devm_kzalloc(dev, s, GFP_KERNEL);
if (!hisi_hba->slot_index_tags)
goto err_out;
s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
hisi_hba->initial_fis = dma_alloc_coherent(dev, s,
&hisi_hba->initial_fis_dma, GFP_KERNEL);
if (!hisi_hba->initial_fis)
goto err_out;
s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
hisi_hba->sata_breakpoint = dma_alloc_coherent(dev, s,
&hisi_hba->sata_breakpoint_dma, GFP_KERNEL);
if (!hisi_hba->sata_breakpoint)
goto err_out;
hisi_sas_init_mem(hisi_hba);
hisi_sas_slot_index_init(hisi_hba);
hisi_hba->wq = create_singlethread_workqueue(dev_name(dev));
if (!hisi_hba->wq) {
dev_err(dev, "sas_alloc: failed to create workqueue\n");
goto err_out;
}
return 0;
err_out:
return -ENOMEM;
}
EXPORT_SYMBOL_GPL(hisi_sas_alloc);
void hisi_sas_free(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
int i, s, max_command_entries = hisi_hba->hw->max_command_entries;
for (i = 0; i < hisi_hba->queue_count; i++) {
s = sizeof(struct hisi_sas_cmd_hdr) * HISI_SAS_QUEUE_SLOTS;
if (hisi_hba->cmd_hdr[i])
dma_free_coherent(dev, s,
hisi_hba->cmd_hdr[i],
hisi_hba->cmd_hdr_dma[i]);
s = hisi_hba->hw->complete_hdr_size * HISI_SAS_QUEUE_SLOTS;
if (hisi_hba->complete_hdr[i])
dma_free_coherent(dev, s,
hisi_hba->complete_hdr[i],
hisi_hba->complete_hdr_dma[i]);
}
dma_pool_destroy(hisi_hba->buffer_pool);
s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_itct);
if (hisi_hba->itct)
dma_free_coherent(dev, s,
hisi_hba->itct, hisi_hba->itct_dma);
s = max_command_entries * sizeof(struct hisi_sas_iost);
if (hisi_hba->iost)
dma_free_coherent(dev, s,
hisi_hba->iost, hisi_hba->iost_dma);
s = max_command_entries * sizeof(struct hisi_sas_breakpoint);
if (hisi_hba->breakpoint)
dma_free_coherent(dev, s,
hisi_hba->breakpoint,
hisi_hba->breakpoint_dma);
s = sizeof(struct hisi_sas_initial_fis) * HISI_SAS_MAX_PHYS;
if (hisi_hba->initial_fis)
dma_free_coherent(dev, s,
hisi_hba->initial_fis,
hisi_hba->initial_fis_dma);
s = HISI_SAS_MAX_ITCT_ENTRIES * sizeof(struct hisi_sas_sata_breakpoint);
if (hisi_hba->sata_breakpoint)
dma_free_coherent(dev, s,
hisi_hba->sata_breakpoint,
hisi_hba->sata_breakpoint_dma);
if (hisi_hba->wq)
destroy_workqueue(hisi_hba->wq);
}
EXPORT_SYMBOL_GPL(hisi_sas_free);
void hisi_sas_rst_work_handler(struct work_struct *work)
{
struct hisi_hba *hisi_hba =
container_of(work, struct hisi_hba, rst_work);
hisi_sas_controller_reset(hisi_hba);
}
EXPORT_SYMBOL_GPL(hisi_sas_rst_work_handler);
int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
{
struct device *dev = hisi_hba->dev;
struct platform_device *pdev = hisi_hba->platform_dev;
struct device_node *np = pdev ? pdev->dev.of_node : NULL;
struct clk *refclk;
if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
SAS_ADDR_SIZE)) {
dev_err(dev, "could not get property sas-addr\n");
return -ENOENT;
}
if (np) {
/*
* These properties are only required for platform device-based
* controller with DT firmware.
*/
hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
"hisilicon,sas-syscon");
if (IS_ERR(hisi_hba->ctrl)) {
dev_err(dev, "could not get syscon\n");
return -ENOENT;
}
if (device_property_read_u32(dev, "ctrl-reset-reg",
&hisi_hba->ctrl_reset_reg)) {
dev_err(dev,
"could not get property ctrl-reset-reg\n");
return -ENOENT;
}
if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
&hisi_hba->ctrl_reset_sts_reg)) {
dev_err(dev,
"could not get property ctrl-reset-sts-reg\n");
return -ENOENT;
}
if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
&hisi_hba->ctrl_clock_ena_reg)) {
dev_err(dev,
"could not get property ctrl-clock-ena-reg\n");
return -ENOENT;
}
}
refclk = devm_clk_get(dev, NULL);
if (IS_ERR(refclk))
dev_dbg(dev, "no ref clk property\n");
else
hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
dev_err(dev, "could not get property phy-count\n");
return -ENOENT;
}
if (device_property_read_u32(dev, "queue-count",
&hisi_hba->queue_count)) {
dev_err(dev, "could not get property queue-count\n");
return -ENOENT;
}
return 0;
}
EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
const struct hisi_sas_hw *hw)
{
struct resource *res;
struct Scsi_Host *shost;
struct hisi_hba *hisi_hba;
struct device *dev = &pdev->dev;
shost = scsi_host_alloc(hisi_sas_sht, sizeof(*hisi_hba));
if (!shost) {
dev_err(dev, "scsi host alloc failed\n");
return NULL;
}
hisi_hba = shost_priv(shost);
INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
hisi_hba->hw = hw;
hisi_hba->dev = dev;
hisi_hba->platform_dev = pdev;
hisi_hba->shost = shost;
SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
timer_setup(&hisi_hba->timer, NULL, 0);
if (hisi_sas_get_fw_info(hisi_hba) < 0)
goto err_out;
if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32))) {
dev_err(dev, "No usable DMA addressing method\n");
goto err_out;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hisi_hba->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(hisi_hba->regs))
goto err_out;
if (hisi_sas_alloc(hisi_hba, shost)) {
hisi_sas_free(hisi_hba);
goto err_out;
}
return shost;
err_out:
scsi_host_put(shost);
dev_err(dev, "shost alloc failed\n");
return NULL;
}
void hisi_sas_init_add(struct hisi_hba *hisi_hba)
{
int i;
for (i = 0; i < hisi_hba->n_phy; i++)
memcpy(&hisi_hba->phy[i].dev_sas_addr,
hisi_hba->sas_addr,
SAS_ADDR_SIZE);
}
EXPORT_SYMBOL_GPL(hisi_sas_init_add);
int hisi_sas_probe(struct platform_device *pdev,
const struct hisi_sas_hw *hw)
{
struct Scsi_Host *shost;
struct hisi_hba *hisi_hba;
struct device *dev = &pdev->dev;
struct asd_sas_phy **arr_phy;
struct asd_sas_port **arr_port;
struct sas_ha_struct *sha;
int rc, phy_nr, port_nr, i;
shost = hisi_sas_shost_alloc(pdev, hw);
if (!shost)
return -ENOMEM;
sha = SHOST_TO_SAS_HA(shost);
hisi_hba = shost_priv(shost);
platform_set_drvdata(pdev, sha);
phy_nr = port_nr = hisi_hba->n_phy;
arr_phy = devm_kcalloc(dev, phy_nr, sizeof(void *), GFP_KERNEL);
arr_port = devm_kcalloc(dev, port_nr, sizeof(void *), GFP_KERNEL);
if (!arr_phy || !arr_port) {
rc = -ENOMEM;
goto err_out_ha;
}
sha->sas_phy = arr_phy;
sha->sas_port = arr_port;
sha->lldd_ha = hisi_hba;
shost->transportt = hisi_sas_stt;
shost->max_id = HISI_SAS_MAX_DEVICES;
shost->max_lun = ~0;
shost->max_channel = 1;
shost->max_cmd_len = 16;
shost->sg_tablesize = min_t(u16, SG_ALL, HISI_SAS_SGE_PAGE_CNT);
shost->can_queue = hisi_hba->hw->max_command_entries;
shost->cmd_per_lun = hisi_hba->hw->max_command_entries;
sha->sas_ha_name = DRV_NAME;
sha->dev = hisi_hba->dev;
sha->lldd_module = THIS_MODULE;
sha->sas_addr = &hisi_hba->sas_addr[0];
sha->num_phys = hisi_hba->n_phy;
sha->core.shost = hisi_hba->shost;
for (i = 0; i < hisi_hba->n_phy; i++) {
sha->sas_phy[i] = &hisi_hba->phy[i].sas_phy;
sha->sas_port[i] = &hisi_hba->port[i].sas_port;
}
hisi_sas_init_add(hisi_hba);
rc = scsi_add_host(shost, &pdev->dev);
if (rc)
goto err_out_ha;
rc = sas_register_ha(sha);
if (rc)
goto err_out_register_ha;
rc = hisi_hba->hw->hw_init(hisi_hba);
if (rc)
goto err_out_register_ha;
scsi_scan_host(shost);
return 0;
err_out_register_ha:
scsi_remove_host(shost);
err_out_ha:
hisi_sas_free(hisi_hba);
scsi_host_put(shost);
return rc;
}
EXPORT_SYMBOL_GPL(hisi_sas_probe);
int hisi_sas_remove(struct platform_device *pdev)
{
struct sas_ha_struct *sha = platform_get_drvdata(pdev);
struct hisi_hba *hisi_hba = sha->lldd_ha;
struct Scsi_Host *shost = sha->core.shost;
sas_unregister_ha(sha);
sas_remove_host(sha->core.shost);
hisi_sas_free(hisi_hba);
scsi_host_put(shost);
return 0;
}
EXPORT_SYMBOL_GPL(hisi_sas_remove);
static __init int hisi_sas_init(void)
{
hisi_sas_stt = sas_domain_attach_transport(&hisi_sas_transport_ops);
if (!hisi_sas_stt)
return -ENOMEM;
return 0;
}
static __exit void hisi_sas_exit(void)
{
sas_release_transport(hisi_sas_stt);
}
module_init(hisi_sas_init);
module_exit(hisi_sas_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("John Garry <john.garry@huawei.com>");
MODULE_DESCRIPTION("HISILICON SAS controller driver");
MODULE_ALIAS("platform:" DRV_NAME);