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hisi_sas: add v2 path to send ATA command
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Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored and Martin K. Petersen committed Feb 24, 2016
1 parent 85b2c3c commit 6f2ff1a
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4 changes: 4 additions & 0 deletions drivers/scsi/hisi_sas/hisi_sas.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <scsi/sas_ata.h>
#include <scsi/libsas.h>

#define DRV_VERSION "v1.0"
Expand All @@ -35,6 +36,7 @@

#define HISI_SAS_MAX_SSP_RESP_SZ (sizeof(struct ssp_frame_hdr) + 1024)
#define HISI_SAS_MAX_SMP_RESP_SZ 1028
#define HISI_SAS_MAX_STP_RESP_SZ 28

#define DEV_IS_EXPANDER(type) \
((type == SAS_EDGE_EXPANDER_DEVICE) || \
Expand Down Expand Up @@ -135,6 +137,8 @@ struct hisi_sas_hw {
struct hisi_sas_tmf_task *tmf);
int (*prep_smp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
int (*prep_stp)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot);
int (*slot_complete)(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot, int abort);
void (*phy_enable)(struct hisi_hba *hisi_hba, int phy_no);
Expand Down
8 changes: 8 additions & 0 deletions drivers/scsi/hisi_sas/hisi_sas_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,12 @@ static int hisi_sas_task_prep_ssp(struct hisi_hba *hisi_hba,
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(struct sas_task *task, struct hisi_hba *hisi_hba,
int is_tmf, struct hisi_sas_tmf_task *tmf,
int *pass)
Expand Down Expand Up @@ -230,6 +236,8 @@ static int hisi_sas_task_prep(struct sas_task *task, struct hisi_hba *hisi_hba,
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);
Expand Down
162 changes: 162 additions & 0 deletions drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -269,6 +269,12 @@ enum {
#define DIR_TO_DEVICE 2
#define DIR_RESERVED 3

#define SATA_PROTOCOL_NONDATA 0x1
#define SATA_PROTOCOL_PIO 0x2
#define SATA_PROTOCOL_DMA 0x4
#define SATA_PROTOCOL_FPDMA 0x8
#define SATA_PROTOCOL_ATAPI 0x10

static u32 hisi_sas_read32(struct hisi_hba *hisi_hba, u32 off)
{
void __iomem *regs = hisi_hba->regs + off;
Expand Down Expand Up @@ -994,6 +1000,19 @@ static int prep_ssp_v2_hw(struct hisi_hba *hisi_hba,
return 0;
}

static void sata_done_v2_hw(struct hisi_hba *hisi_hba, 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 dev_to_host_fis *d2h = slot->status_buffer +
sizeof(struct hisi_sas_err_record);

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);
}
static int
slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot,
int abort)
Expand Down Expand Up @@ -1070,6 +1089,11 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot,
case SAS_PROTOCOL_SATA:
case SAS_PROTOCOL_STP:
case SAS_PROTOCOL_SATA | SAS_PROTOCOL_STP:
{
ts->stat = SAM_STAT_GOOD;
sata_done_v2_hw(hisi_hba, task, slot);
break;
}
default:
ts->stat = SAM_STAT_CHECK_CONDITION;
break;
Expand All @@ -1094,6 +1118,143 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot,
return sts;
}

static u8 get_ata_protocol(u8 cmd, int direction)
{
switch (cmd) {
case ATA_CMD_FPDMA_WRITE:
case ATA_CMD_FPDMA_READ:
return SATA_PROTOCOL_FPDMA;

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 SATA_PROTOCOL_PIO;

case ATA_CMD_READ:
case ATA_CMD_READ_EXT:
case ATA_CMD_READ_LOG_DMA_EXT:
case ATA_CMD_WRITE:
case ATA_CMD_WRITE_EXT:
case ATA_CMD_WRITE_QUEUED:
case ATA_CMD_WRITE_LOG_DMA_EXT:
return SATA_PROTOCOL_DMA;

case ATA_CMD_DOWNLOAD_MICRO:
case ATA_CMD_DEV_RESET:
case ATA_CMD_CHK_POWER:
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:
return SATA_PROTOCOL_NONDATA;
default:
if (direction == DMA_NONE)
return SATA_PROTOCOL_NONDATA;
return SATA_PROTOCOL_PIO;
}
}

static int get_ncq_tag_v2_hw(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;
}

static int prep_ata_v2_hw(struct hisi_hba *hisi_hba,
struct hisi_sas_slot *slot)
{
struct sas_task *task = slot->task;
struct domain_device *device = task->dev;
struct domain_device *parent_dev = device->parent;
struct hisi_sas_device *sas_dev = device->lldd_dev;
struct hisi_sas_cmd_hdr *hdr = slot->cmd_hdr;
struct hisi_sas_port *port = device->port->lldd_port;
u8 *buf_cmd;
int has_data = 0, rc = 0, hdr_tag = 0;
u32 dw1 = 0, dw2 = 0;

/* create header */
/* dw0 */
hdr->dw0 = cpu_to_le32(port->id << CMD_HDR_PORT_OFF);
if (parent_dev && DEV_IS_EXPANDER(parent_dev->dev_type))
hdr->dw0 |= cpu_to_le32(3 << CMD_HDR_CMD_OFF);
else
hdr->dw0 |= cpu_to_le32(4 << CMD_HDR_CMD_OFF);

/* dw1 */
switch (task->data_dir) {
case DMA_TO_DEVICE:
has_data = 1;
dw1 |= DIR_TO_DEVICE << CMD_HDR_DIR_OFF;
break;
case DMA_FROM_DEVICE:
has_data = 1;
dw1 |= DIR_TO_INI << CMD_HDR_DIR_OFF;
break;
default:
dw1 &= ~CMD_HDR_DIR_MSK;
}

if (0 == task->ata_task.fis.command)
dw1 |= 1 << CMD_HDR_RESET_OFF;

dw1 |= (get_ata_protocol(task->ata_task.fis.command, task->data_dir))
<< CMD_HDR_FRAME_TYPE_OFF;
dw1 |= sas_dev->device_id << CMD_HDR_DEV_ID_OFF;
hdr->dw1 = cpu_to_le32(dw1);

/* dw2 */
if (task->ata_task.use_ncq && get_ncq_tag_v2_hw(task, &hdr_tag)) {
task->ata_task.fis.sector_count |= (u8) (hdr_tag << 3);
dw2 |= hdr_tag << CMD_HDR_NCQ_TAG_OFF;
}

dw2 |= (HISI_SAS_MAX_STP_RESP_SZ / 4) << CMD_HDR_CFL_OFF |
2 << CMD_HDR_SG_MOD_OFF;
hdr->dw2 = cpu_to_le32(dw2);

/* dw3 */
hdr->transfer_tags = cpu_to_le32(slot->idx);

if (has_data) {
rc = prep_prd_sge_v2_hw(hisi_hba, slot, hdr, task->scatter,
slot->n_elem);
if (rc)
return rc;
}


hdr->data_transfer_len = cpu_to_le32(task->total_xfer_len);
hdr->cmd_table_addr = cpu_to_le64(slot->command_table_dma);
hdr->sts_buffer_addr = cpu_to_le64(slot->status_buffer_dma);

buf_cmd = slot->command_table;

if (likely(!task->ata_task.device_control_reg_update))
task->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
/* fill in command FIS */
memcpy(buf_cmd, &task->ata_task.fis, sizeof(struct host_to_dev_fis));

return 0;
}

static int phy_up_v2_hw(int phy_no, struct hisi_hba *hisi_hba)
{
int i, res = 0;
Expand Down Expand Up @@ -1559,6 +1720,7 @@ static const struct hisi_sas_hw hisi_sas_v2_hw = {
.free_device = free_device_v2_hw,
.prep_smp = prep_smp_v2_hw,
.prep_ssp = prep_ssp_v2_hw,
.prep_stp = prep_ata_v2_hw,
.get_free_slot = get_free_slot_v2_hw,
.start_delivery = start_delivery_v2_hw,
.slot_complete = slot_complete_v2_hw,
Expand Down

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