626 lines
16 KiB
C
626 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Aic94xx SAS/SATA Tasks
|
|
*
|
|
* Copyright (C) 2005 Adaptec, Inc. All rights reserved.
|
|
* Copyright (C) 2005 Luben Tuikov <luben_tuikov@adaptec.com>
|
|
*/
|
|
|
|
#include <linux/spinlock.h>
|
|
#include "aic94xx.h"
|
|
#include "aic94xx_sas.h"
|
|
#include "aic94xx_hwi.h"
|
|
|
|
static void asd_unbuild_ata_ascb(struct asd_ascb *a);
|
|
static void asd_unbuild_smp_ascb(struct asd_ascb *a);
|
|
static void asd_unbuild_ssp_ascb(struct asd_ascb *a);
|
|
|
|
static void asd_can_dequeue(struct asd_ha_struct *asd_ha, int num)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
|
|
asd_ha->seq.can_queue += num;
|
|
spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
|
|
}
|
|
|
|
/* DMA_... to our direction translation.
|
|
*/
|
|
static const u8 data_dir_flags[] = {
|
|
[DMA_BIDIRECTIONAL] = DATA_DIR_BYRECIPIENT, /* UNSPECIFIED */
|
|
[DMA_TO_DEVICE] = DATA_DIR_OUT, /* OUTBOUND */
|
|
[DMA_FROM_DEVICE] = DATA_DIR_IN, /* INBOUND */
|
|
[DMA_NONE] = DATA_DIR_NONE, /* NO TRANSFER */
|
|
};
|
|
|
|
static int asd_map_scatterlist(struct sas_task *task,
|
|
struct sg_el *sg_arr,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct asd_ascb *ascb = task->lldd_task;
|
|
struct asd_ha_struct *asd_ha = ascb->ha;
|
|
struct scatterlist *sc;
|
|
int num_sg, res;
|
|
|
|
if (task->data_dir == DMA_NONE)
|
|
return 0;
|
|
|
|
if (task->num_scatter == 0) {
|
|
void *p = task->scatter;
|
|
dma_addr_t dma = dma_map_single(&asd_ha->pcidev->dev, p,
|
|
task->total_xfer_len,
|
|
task->data_dir);
|
|
sg_arr[0].bus_addr = cpu_to_le64((u64)dma);
|
|
sg_arr[0].size = cpu_to_le32(task->total_xfer_len);
|
|
sg_arr[0].flags |= ASD_SG_EL_LIST_EOL;
|
|
return 0;
|
|
}
|
|
|
|
/* STP tasks come from libata which has already mapped
|
|
* the SG list */
|
|
if (sas_protocol_ata(task->task_proto))
|
|
num_sg = task->num_scatter;
|
|
else
|
|
num_sg = dma_map_sg(&asd_ha->pcidev->dev, task->scatter,
|
|
task->num_scatter, task->data_dir);
|
|
if (num_sg == 0)
|
|
return -ENOMEM;
|
|
|
|
if (num_sg > 3) {
|
|
int i;
|
|
|
|
ascb->sg_arr = asd_alloc_coherent(asd_ha,
|
|
num_sg*sizeof(struct sg_el),
|
|
gfp_flags);
|
|
if (!ascb->sg_arr) {
|
|
res = -ENOMEM;
|
|
goto err_unmap;
|
|
}
|
|
for_each_sg(task->scatter, sc, num_sg, i) {
|
|
struct sg_el *sg =
|
|
&((struct sg_el *)ascb->sg_arr->vaddr)[i];
|
|
sg->bus_addr = cpu_to_le64((u64)sg_dma_address(sc));
|
|
sg->size = cpu_to_le32((u32)sg_dma_len(sc));
|
|
if (i == num_sg-1)
|
|
sg->flags |= ASD_SG_EL_LIST_EOL;
|
|
}
|
|
|
|
for_each_sg(task->scatter, sc, 2, i) {
|
|
sg_arr[i].bus_addr =
|
|
cpu_to_le64((u64)sg_dma_address(sc));
|
|
sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
|
|
}
|
|
sg_arr[1].next_sg_offs = 2 * sizeof(*sg_arr);
|
|
sg_arr[1].flags |= ASD_SG_EL_LIST_EOS;
|
|
|
|
memset(&sg_arr[2], 0, sizeof(*sg_arr));
|
|
sg_arr[2].bus_addr=cpu_to_le64((u64)ascb->sg_arr->dma_handle);
|
|
} else {
|
|
int i;
|
|
for_each_sg(task->scatter, sc, num_sg, i) {
|
|
sg_arr[i].bus_addr =
|
|
cpu_to_le64((u64)sg_dma_address(sc));
|
|
sg_arr[i].size = cpu_to_le32((u32)sg_dma_len(sc));
|
|
}
|
|
sg_arr[i-1].flags |= ASD_SG_EL_LIST_EOL;
|
|
}
|
|
|
|
return 0;
|
|
err_unmap:
|
|
if (sas_protocol_ata(task->task_proto))
|
|
dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
|
|
task->num_scatter, task->data_dir);
|
|
return res;
|
|
}
|
|
|
|
static void asd_unmap_scatterlist(struct asd_ascb *ascb)
|
|
{
|
|
struct asd_ha_struct *asd_ha = ascb->ha;
|
|
struct sas_task *task = ascb->uldd_task;
|
|
|
|
if (task->data_dir == DMA_NONE)
|
|
return;
|
|
|
|
if (task->num_scatter == 0) {
|
|
dma_addr_t dma = (dma_addr_t)
|
|
le64_to_cpu(ascb->scb->ssp_task.sg_element[0].bus_addr);
|
|
dma_unmap_single(&ascb->ha->pcidev->dev, dma,
|
|
task->total_xfer_len, task->data_dir);
|
|
return;
|
|
}
|
|
|
|
asd_free_coherent(asd_ha, ascb->sg_arr);
|
|
if (task->task_proto != SAS_PROTOCOL_STP)
|
|
dma_unmap_sg(&asd_ha->pcidev->dev, task->scatter,
|
|
task->num_scatter, task->data_dir);
|
|
}
|
|
|
|
/* ---------- Task complete tasklet ---------- */
|
|
|
|
static void asd_get_response_tasklet(struct asd_ascb *ascb,
|
|
struct done_list_struct *dl)
|
|
{
|
|
struct asd_ha_struct *asd_ha = ascb->ha;
|
|
struct sas_task *task = ascb->uldd_task;
|
|
struct task_status_struct *ts = &task->task_status;
|
|
unsigned long flags;
|
|
struct tc_resp_sb_struct {
|
|
__le16 index_escb;
|
|
u8 len_lsb;
|
|
u8 flags;
|
|
} __attribute__ ((packed)) *resp_sb = (void *) dl->status_block;
|
|
|
|
/* int size = ((resp_sb->flags & 7) << 8) | resp_sb->len_lsb; */
|
|
int edb_id = ((resp_sb->flags & 0x70) >> 4)-1;
|
|
struct asd_ascb *escb;
|
|
struct asd_dma_tok *edb;
|
|
void *r;
|
|
|
|
spin_lock_irqsave(&asd_ha->seq.tc_index_lock, flags);
|
|
escb = asd_tc_index_find(&asd_ha->seq,
|
|
(int)le16_to_cpu(resp_sb->index_escb));
|
|
spin_unlock_irqrestore(&asd_ha->seq.tc_index_lock, flags);
|
|
|
|
if (!escb) {
|
|
ASD_DPRINTK("Uh-oh! No escb for this dl?!\n");
|
|
return;
|
|
}
|
|
|
|
ts->buf_valid_size = 0;
|
|
edb = asd_ha->seq.edb_arr[edb_id + escb->edb_index];
|
|
r = edb->vaddr;
|
|
if (task->task_proto == SAS_PROTOCOL_SSP) {
|
|
struct ssp_response_iu *iu =
|
|
r + 16 + sizeof(struct ssp_frame_hdr);
|
|
|
|
ts->residual = le32_to_cpu(*(__le32 *)r);
|
|
|
|
sas_ssp_task_response(&asd_ha->pcidev->dev, task, iu);
|
|
} else {
|
|
struct ata_task_resp *resp = (void *) &ts->buf[0];
|
|
|
|
ts->residual = le32_to_cpu(*(__le32 *)r);
|
|
|
|
if (SAS_STATUS_BUF_SIZE >= sizeof(*resp)) {
|
|
resp->frame_len = le16_to_cpu(*(__le16 *)(r+6));
|
|
memcpy(&resp->ending_fis[0], r+16, ATA_RESP_FIS_SIZE);
|
|
ts->buf_valid_size = sizeof(*resp);
|
|
}
|
|
}
|
|
|
|
asd_invalidate_edb(escb, edb_id);
|
|
}
|
|
|
|
static void asd_task_tasklet_complete(struct asd_ascb *ascb,
|
|
struct done_list_struct *dl)
|
|
{
|
|
struct sas_task *task = ascb->uldd_task;
|
|
struct task_status_struct *ts = &task->task_status;
|
|
unsigned long flags;
|
|
u8 opcode = dl->opcode;
|
|
|
|
asd_can_dequeue(ascb->ha, 1);
|
|
|
|
Again:
|
|
switch (opcode) {
|
|
case TC_NO_ERROR:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAM_STAT_GOOD;
|
|
break;
|
|
case TC_UNDERRUN:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_DATA_UNDERRUN;
|
|
ts->residual = le32_to_cpu(*(__le32 *)dl->status_block);
|
|
break;
|
|
case TC_OVERRUN:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_DATA_OVERRUN;
|
|
ts->residual = 0;
|
|
break;
|
|
case TC_SSP_RESP:
|
|
case TC_ATA_RESP:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_PROTO_RESPONSE;
|
|
asd_get_response_tasklet(ascb, dl);
|
|
break;
|
|
case TF_OPEN_REJECT:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_OPEN_REJECT;
|
|
if (dl->status_block[1] & 2)
|
|
ts->open_rej_reason = 1 + dl->status_block[2];
|
|
else if (dl->status_block[1] & 1)
|
|
ts->open_rej_reason = (dl->status_block[2] >> 4)+10;
|
|
else
|
|
ts->open_rej_reason = SAS_OREJ_UNKNOWN;
|
|
break;
|
|
case TF_OPEN_TO:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_OPEN_TO;
|
|
break;
|
|
case TF_PHY_DOWN:
|
|
case TU_PHY_DOWN:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_PHY_DOWN;
|
|
break;
|
|
case TI_PHY_DOWN:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_PHY_DOWN;
|
|
break;
|
|
case TI_BREAK:
|
|
case TI_PROTO_ERR:
|
|
case TI_NAK:
|
|
case TI_ACK_NAK_TO:
|
|
case TF_SMP_XMIT_RCV_ERR:
|
|
case TC_ATA_R_ERR_RECV:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_INTERRUPTED;
|
|
break;
|
|
case TF_BREAK:
|
|
case TU_BREAK:
|
|
case TU_ACK_NAK_TO:
|
|
case TF_SMPRSP_TO:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_DEV_NO_RESPONSE;
|
|
break;
|
|
case TF_NAK_RECV:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_NAK_R_ERR;
|
|
break;
|
|
case TA_I_T_NEXUS_LOSS:
|
|
opcode = dl->status_block[0];
|
|
goto Again;
|
|
break;
|
|
case TF_INV_CONN_HANDLE:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_DEVICE_UNKNOWN;
|
|
break;
|
|
case TF_REQUESTED_N_PENDING:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_PENDING;
|
|
break;
|
|
case TC_TASK_CLEARED:
|
|
case TA_ON_REQ:
|
|
ts->resp = SAS_TASK_COMPLETE;
|
|
ts->stat = SAS_ABORTED_TASK;
|
|
break;
|
|
|
|
case TF_NO_SMP_CONN:
|
|
case TF_TMF_NO_CTX:
|
|
case TF_TMF_NO_TAG:
|
|
case TF_TMF_TAG_FREE:
|
|
case TF_TMF_TASK_DONE:
|
|
case TF_TMF_NO_CONN_HANDLE:
|
|
case TF_IRTT_TO:
|
|
case TF_IU_SHORT:
|
|
case TF_DATA_OFFS_ERR:
|
|
ts->resp = SAS_TASK_UNDELIVERED;
|
|
ts->stat = SAS_DEV_NO_RESPONSE;
|
|
break;
|
|
|
|
case TC_LINK_ADM_RESP:
|
|
case TC_CONTROL_PHY:
|
|
case TC_RESUME:
|
|
case TC_PARTIAL_SG_LIST:
|
|
default:
|
|
ASD_DPRINTK("%s: dl opcode: 0x%x?\n", __func__, opcode);
|
|
break;
|
|
}
|
|
|
|
switch (task->task_proto) {
|
|
case SAS_PROTOCOL_SATA:
|
|
case SAS_PROTOCOL_STP:
|
|
asd_unbuild_ata_ascb(ascb);
|
|
break;
|
|
case SAS_PROTOCOL_SMP:
|
|
asd_unbuild_smp_ascb(ascb);
|
|
break;
|
|
case SAS_PROTOCOL_SSP:
|
|
asd_unbuild_ssp_ascb(ascb);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
task->task_state_flags &= ~SAS_TASK_STATE_PENDING;
|
|
task->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
|
|
task->task_state_flags |= SAS_TASK_STATE_DONE;
|
|
if (unlikely((task->task_state_flags & SAS_TASK_STATE_ABORTED))) {
|
|
struct completion *completion = ascb->completion;
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
ASD_DPRINTK("task 0x%p done with opcode 0x%x resp 0x%x "
|
|
"stat 0x%x but aborted by upper layer!\n",
|
|
task, opcode, ts->resp, ts->stat);
|
|
if (completion)
|
|
complete(completion);
|
|
} else {
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
task->lldd_task = NULL;
|
|
asd_ascb_free(ascb);
|
|
mb();
|
|
task->task_done(task);
|
|
}
|
|
}
|
|
|
|
/* ---------- ATA ---------- */
|
|
|
|
static int asd_build_ata_ascb(struct asd_ascb *ascb, struct sas_task *task,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct domain_device *dev = task->dev;
|
|
struct scb *scb;
|
|
u8 flags;
|
|
int res = 0;
|
|
|
|
scb = ascb->scb;
|
|
|
|
if (unlikely(task->ata_task.device_control_reg_update))
|
|
scb->header.opcode = CONTROL_ATA_DEV;
|
|
else if (dev->sata_dev.class == ATA_DEV_ATAPI)
|
|
scb->header.opcode = INITIATE_ATAPI_TASK;
|
|
else
|
|
scb->header.opcode = INITIATE_ATA_TASK;
|
|
|
|
scb->ata_task.proto_conn_rate = (1 << 5); /* STP */
|
|
if (dev->port->oob_mode == SAS_OOB_MODE)
|
|
scb->ata_task.proto_conn_rate |= dev->linkrate;
|
|
|
|
scb->ata_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
|
|
scb->ata_task.fis = task->ata_task.fis;
|
|
if (likely(!task->ata_task.device_control_reg_update))
|
|
scb->ata_task.fis.flags |= 0x80; /* C=1: update ATA cmd reg */
|
|
scb->ata_task.fis.flags &= 0xF0; /* PM_PORT field shall be 0 */
|
|
if (dev->sata_dev.class == ATA_DEV_ATAPI)
|
|
memcpy(scb->ata_task.atapi_packet, task->ata_task.atapi_packet,
|
|
16);
|
|
scb->ata_task.sister_scb = cpu_to_le16(0xFFFF);
|
|
scb->ata_task.conn_handle = cpu_to_le16(
|
|
(u16)(unsigned long)dev->lldd_dev);
|
|
|
|
if (likely(!task->ata_task.device_control_reg_update)) {
|
|
flags = 0;
|
|
if (task->ata_task.dma_xfer)
|
|
flags |= DATA_XFER_MODE_DMA;
|
|
if (task->ata_task.use_ncq &&
|
|
dev->sata_dev.class != ATA_DEV_ATAPI)
|
|
flags |= ATA_Q_TYPE_NCQ;
|
|
flags |= data_dir_flags[task->data_dir];
|
|
scb->ata_task.ata_flags = flags;
|
|
|
|
scb->ata_task.retry_count = task->ata_task.retry_count;
|
|
|
|
flags = 0;
|
|
if (task->ata_task.set_affil_pol)
|
|
flags |= SET_AFFIL_POLICY;
|
|
if (task->ata_task.stp_affil_pol)
|
|
flags |= STP_AFFIL_POLICY;
|
|
scb->ata_task.flags = flags;
|
|
}
|
|
ascb->tasklet_complete = asd_task_tasklet_complete;
|
|
|
|
if (likely(!task->ata_task.device_control_reg_update))
|
|
res = asd_map_scatterlist(task, scb->ata_task.sg_element,
|
|
gfp_flags);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void asd_unbuild_ata_ascb(struct asd_ascb *a)
|
|
{
|
|
asd_unmap_scatterlist(a);
|
|
}
|
|
|
|
/* ---------- SMP ---------- */
|
|
|
|
static int asd_build_smp_ascb(struct asd_ascb *ascb, struct sas_task *task,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct asd_ha_struct *asd_ha = ascb->ha;
|
|
struct domain_device *dev = task->dev;
|
|
struct scb *scb;
|
|
|
|
dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_req, 1,
|
|
DMA_TO_DEVICE);
|
|
dma_map_sg(&asd_ha->pcidev->dev, &task->smp_task.smp_resp, 1,
|
|
DMA_FROM_DEVICE);
|
|
|
|
scb = ascb->scb;
|
|
|
|
scb->header.opcode = INITIATE_SMP_TASK;
|
|
|
|
scb->smp_task.proto_conn_rate = dev->linkrate;
|
|
|
|
scb->smp_task.smp_req.bus_addr =
|
|
cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_req));
|
|
scb->smp_task.smp_req.size =
|
|
cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_req)-4);
|
|
|
|
scb->smp_task.smp_resp.bus_addr =
|
|
cpu_to_le64((u64)sg_dma_address(&task->smp_task.smp_resp));
|
|
scb->smp_task.smp_resp.size =
|
|
cpu_to_le32((u32)sg_dma_len(&task->smp_task.smp_resp)-4);
|
|
|
|
scb->smp_task.sister_scb = cpu_to_le16(0xFFFF);
|
|
scb->smp_task.conn_handle = cpu_to_le16((u16)
|
|
(unsigned long)dev->lldd_dev);
|
|
|
|
ascb->tasklet_complete = asd_task_tasklet_complete;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void asd_unbuild_smp_ascb(struct asd_ascb *a)
|
|
{
|
|
struct sas_task *task = a->uldd_task;
|
|
|
|
BUG_ON(!task);
|
|
dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_req, 1,
|
|
DMA_TO_DEVICE);
|
|
dma_unmap_sg(&a->ha->pcidev->dev, &task->smp_task.smp_resp, 1,
|
|
DMA_FROM_DEVICE);
|
|
}
|
|
|
|
/* ---------- SSP ---------- */
|
|
|
|
static int asd_build_ssp_ascb(struct asd_ascb *ascb, struct sas_task *task,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct domain_device *dev = task->dev;
|
|
struct scb *scb;
|
|
int res = 0;
|
|
|
|
scb = ascb->scb;
|
|
|
|
scb->header.opcode = INITIATE_SSP_TASK;
|
|
|
|
scb->ssp_task.proto_conn_rate = (1 << 4); /* SSP */
|
|
scb->ssp_task.proto_conn_rate |= dev->linkrate;
|
|
scb->ssp_task.total_xfer_len = cpu_to_le32(task->total_xfer_len);
|
|
scb->ssp_task.ssp_frame.frame_type = SSP_DATA;
|
|
memcpy(scb->ssp_task.ssp_frame.hashed_dest_addr, dev->hashed_sas_addr,
|
|
HASHED_SAS_ADDR_SIZE);
|
|
memcpy(scb->ssp_task.ssp_frame.hashed_src_addr,
|
|
dev->port->ha->hashed_sas_addr, HASHED_SAS_ADDR_SIZE);
|
|
scb->ssp_task.ssp_frame.tptt = cpu_to_be16(0xFFFF);
|
|
|
|
memcpy(scb->ssp_task.ssp_cmd.lun, task->ssp_task.LUN, 8);
|
|
if (task->ssp_task.enable_first_burst)
|
|
scb->ssp_task.ssp_cmd.efb_prio_attr |= EFB_MASK;
|
|
scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_prio << 3);
|
|
scb->ssp_task.ssp_cmd.efb_prio_attr |= (task->ssp_task.task_attr & 7);
|
|
memcpy(scb->ssp_task.ssp_cmd.cdb, task->ssp_task.cmd->cmnd,
|
|
task->ssp_task.cmd->cmd_len);
|
|
|
|
scb->ssp_task.sister_scb = cpu_to_le16(0xFFFF);
|
|
scb->ssp_task.conn_handle = cpu_to_le16(
|
|
(u16)(unsigned long)dev->lldd_dev);
|
|
scb->ssp_task.data_dir = data_dir_flags[task->data_dir];
|
|
scb->ssp_task.retry_count = scb->ssp_task.retry_count;
|
|
|
|
ascb->tasklet_complete = asd_task_tasklet_complete;
|
|
|
|
res = asd_map_scatterlist(task, scb->ssp_task.sg_element, gfp_flags);
|
|
|
|
return res;
|
|
}
|
|
|
|
static void asd_unbuild_ssp_ascb(struct asd_ascb *a)
|
|
{
|
|
asd_unmap_scatterlist(a);
|
|
}
|
|
|
|
/* ---------- Execute Task ---------- */
|
|
|
|
static int asd_can_queue(struct asd_ha_struct *asd_ha, int num)
|
|
{
|
|
int res = 0;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&asd_ha->seq.pend_q_lock, flags);
|
|
if ((asd_ha->seq.can_queue - num) < 0)
|
|
res = -SAS_QUEUE_FULL;
|
|
else
|
|
asd_ha->seq.can_queue -= num;
|
|
spin_unlock_irqrestore(&asd_ha->seq.pend_q_lock, flags);
|
|
|
|
return res;
|
|
}
|
|
|
|
int asd_execute_task(struct sas_task *task, gfp_t gfp_flags)
|
|
{
|
|
int res = 0;
|
|
LIST_HEAD(alist);
|
|
struct sas_task *t = task;
|
|
struct asd_ascb *ascb = NULL, *a;
|
|
struct asd_ha_struct *asd_ha = task->dev->port->ha->lldd_ha;
|
|
unsigned long flags;
|
|
|
|
res = asd_can_queue(asd_ha, 1);
|
|
if (res)
|
|
return res;
|
|
|
|
res = 1;
|
|
ascb = asd_ascb_alloc_list(asd_ha, &res, gfp_flags);
|
|
if (res) {
|
|
res = -ENOMEM;
|
|
goto out_err;
|
|
}
|
|
|
|
__list_add(&alist, ascb->list.prev, &ascb->list);
|
|
list_for_each_entry(a, &alist, list) {
|
|
a->uldd_task = t;
|
|
t->lldd_task = a;
|
|
break;
|
|
}
|
|
list_for_each_entry(a, &alist, list) {
|
|
t = a->uldd_task;
|
|
a->uldd_timer = 1;
|
|
if (t->task_proto & SAS_PROTOCOL_STP)
|
|
t->task_proto = SAS_PROTOCOL_STP;
|
|
switch (t->task_proto) {
|
|
case SAS_PROTOCOL_SATA:
|
|
case SAS_PROTOCOL_STP:
|
|
res = asd_build_ata_ascb(a, t, gfp_flags);
|
|
break;
|
|
case SAS_PROTOCOL_SMP:
|
|
res = asd_build_smp_ascb(a, t, gfp_flags);
|
|
break;
|
|
case SAS_PROTOCOL_SSP:
|
|
res = asd_build_ssp_ascb(a, t, gfp_flags);
|
|
break;
|
|
default:
|
|
asd_printk("unknown sas_task proto: 0x%x\n",
|
|
t->task_proto);
|
|
res = -ENOMEM;
|
|
break;
|
|
}
|
|
if (res)
|
|
goto out_err_unmap;
|
|
|
|
spin_lock_irqsave(&t->task_state_lock, flags);
|
|
t->task_state_flags |= SAS_TASK_AT_INITIATOR;
|
|
spin_unlock_irqrestore(&t->task_state_lock, flags);
|
|
}
|
|
list_del_init(&alist);
|
|
|
|
res = asd_post_ascb_list(asd_ha, ascb, 1);
|
|
if (unlikely(res)) {
|
|
a = NULL;
|
|
__list_add(&alist, ascb->list.prev, &ascb->list);
|
|
goto out_err_unmap;
|
|
}
|
|
|
|
return 0;
|
|
out_err_unmap:
|
|
{
|
|
struct asd_ascb *b = a;
|
|
list_for_each_entry(a, &alist, list) {
|
|
if (a == b)
|
|
break;
|
|
t = a->uldd_task;
|
|
spin_lock_irqsave(&t->task_state_lock, flags);
|
|
t->task_state_flags &= ~SAS_TASK_AT_INITIATOR;
|
|
spin_unlock_irqrestore(&t->task_state_lock, flags);
|
|
switch (t->task_proto) {
|
|
case SAS_PROTOCOL_SATA:
|
|
case SAS_PROTOCOL_STP:
|
|
asd_unbuild_ata_ascb(a);
|
|
break;
|
|
case SAS_PROTOCOL_SMP:
|
|
asd_unbuild_smp_ascb(a);
|
|
break;
|
|
case SAS_PROTOCOL_SSP:
|
|
asd_unbuild_ssp_ascb(a);
|
|
default:
|
|
break;
|
|
}
|
|
t->lldd_task = NULL;
|
|
}
|
|
}
|
|
list_del_init(&alist);
|
|
out_err:
|
|
if (ascb)
|
|
asd_ascb_free_list(ascb);
|
|
asd_can_dequeue(asd_ha, 1);
|
|
return res;
|
|
}
|