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scsi: mpi3mr: WRITE SAME implementation 

Enhance driver to divert the WRITE SAME commands that are issued with
UNMAP=1 and NDOB=1 and with the transfer length greater than the max WRITE
SAME length specified by the firmware for the particular drive to the
controller firmware.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307280034.DXU5pTVV-lkp@intel.com/
Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Link: https://lore.kernel.org/r/20230804104248.118924-5-ranjan.kumar@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ranjan Kumar 2023-08-04 16:12:46 +05:30 committed by Martin K. Petersen
parent d9adb81e67
commit e7a8648e1c
2 changed files with 105 additions and 24 deletions
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11
drivers/scsi/mpi3mr/mpi3mr.h
View File

@ -207,6 +207,9 @@ extern atomic64_t event_counter;
*/
#define MPI3MR_MAX_APP_XFER_SECTORS (2048 + 512)
#define MPI3MR_WRITE_SAME_MAX_LEN_256_BLKS 256
#define MPI3MR_WRITE_SAME_MAX_LEN_2048_BLKS 2048
/**
* struct mpi3mr_nvme_pt_sge - Structure to store SGEs for NVMe
* Encapsulated commands.
@ -678,6 +681,7 @@ enum mpi3mr_dev_state {
* @io_unit_port: IO Unit port ID
* @non_stl: Is this device not to be attached with SAS TL
* @io_throttle_enabled: I/O throttling needed or not
* @wslen: Write same max length
* @q_depth: Device specific Queue Depth
* @wwid: World wide ID
* @enclosure_logical_id: Enclosure logical identifier
@ -700,6 +704,7 @@ struct mpi3mr_tgt_dev {
u8 io_unit_port;
u8 non_stl;
u8 io_throttle_enabled;
u16 wslen;
u16 q_depth;
u64 wwid;
u64 enclosure_logical_id;
@ -753,6 +758,8 @@ static inline void mpi3mr_tgtdev_put(struct mpi3mr_tgt_dev *s)
* @dev_removed: Device removed in the Firmware
* @dev_removedelay: Device is waiting to be removed in FW
* @dev_type: Device type
* @dev_nvme_dif: Device is NVMe DIF enabled
* @wslen: Write same max length
* @io_throttle_enabled: I/O throttling needed or not
* @io_divert: Flag indicates io divert is on or off for the dev
* @throttle_group: Pointer to throttle group info
@ -769,6 +776,8 @@ struct mpi3mr_stgt_priv_data {
u8 dev_removed;
u8 dev_removedelay;
u8 dev_type;
u8 dev_nvme_dif;
u16 wslen;
u8 io_throttle_enabled;
u8 io_divert;
struct mpi3mr_throttle_group_info *throttle_group;
@ -784,12 +793,14 @@ struct mpi3mr_stgt_priv_data {
* @ncq_prio_enable: NCQ priority enable for SATA device
* @pend_count: Counter to track pending I/Os during error
* handling
* @wslen: Write same max length
*/
struct mpi3mr_sdev_priv_data {
struct mpi3mr_stgt_priv_data *tgt_priv_data;
u32 lun_id;
u8 ncq_prio_enable;
u32 pend_count;
u16 wslen;
};
/**

118
drivers/scsi/mpi3mr/mpi3mr_os.c
View File

@ -430,6 +430,7 @@ void mpi3mr_invalidate_devhandles(struct mpi3mr_ioc *mrioc)
tgt_priv->io_throttle_enabled = 0;
tgt_priv->io_divert = 0;
tgt_priv->throttle_group = NULL;
tgt_priv->wslen = 0;
if (tgtdev->host_exposed)
atomic_set(&tgt_priv->block_io, 1);
}
@ -1108,6 +1109,18 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
tgtdev->io_throttle_enabled =
(flags & MPI3_DEVICE0_FLAGS_IO_THROTTLING_REQUIRED) ? 1 : 0;
switch (flags & MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_MASK) {
case MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_256_LB:
tgtdev->wslen = MPI3MR_WRITE_SAME_MAX_LEN_256_BLKS;
break;
case MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_2048_LB:
tgtdev->wslen = MPI3MR_WRITE_SAME_MAX_LEN_2048_BLKS;
break;
case MPI3_DEVICE0_FLAGS_MAX_WRITE_SAME_NO_LIMIT:
default:
tgtdev->wslen = 0;
break;
}
if (tgtdev->starget && tgtdev->starget->hostdata) {
scsi_tgt_priv_data = (struct mpi3mr_stgt_priv_data *)
@ -1119,6 +1132,7 @@ static void mpi3mr_update_tgtdev(struct mpi3mr_ioc *mrioc,
tgtdev->io_throttle_enabled;
if (is_added == true)
atomic_set(&scsi_tgt_priv_data->block_io, 0);
scsi_tgt_priv_data->wslen = tgtdev->wslen;
}
switch (dev_pg0->access_status) {
@ -3939,6 +3953,48 @@ void mpi3mr_wait_for_host_io(struct mpi3mr_ioc *mrioc, u32 timeout)
mpi3mr_get_fw_pending_ios(mrioc));
}
/**
* mpi3mr_setup_divert_ws - Setup Divert IO flag for write same
* @mrioc: Adapter instance reference
* @scmd: SCSI command reference
* @scsiio_req: MPI3 SCSI IO request
* @scsiio_flags: Pointer to MPI3 SCSI IO Flags
* @wslen: write same max length
*
* Gets values of unmap, ndob and number of blocks from write
* same scsi io and based on these values it sets divert IO flag
* and reason for diverting IO to firmware.
*
* Return: Nothing
*/
static inline void mpi3mr_setup_divert_ws(struct mpi3mr_ioc *mrioc,
struct scsi_cmnd *scmd, struct mpi3_scsi_io_request *scsiio_req,
u32 *scsiio_flags, u16 wslen)
{
u8 unmap = 0, ndob = 0;
u8 opcode = scmd->cmnd[0];
u32 num_blocks = 0;
u16 sa = (scmd->cmnd[8] << 8) | (scmd->cmnd[9]);
if (opcode == WRITE_SAME_16) {
unmap = scmd->cmnd[1] & 0x08;
ndob = scmd->cmnd[1] & 0x01;
num_blocks = get_unaligned_be32(scmd->cmnd + 10);
} else if ((opcode == VARIABLE_LENGTH_CMD) && (sa == WRITE_SAME_32)) {
unmap = scmd->cmnd[10] & 0x08;
ndob = scmd->cmnd[10] & 0x01;
num_blocks = get_unaligned_be32(scmd->cmnd + 28);
} else
return;
if ((unmap) && (ndob) && (num_blocks > wslen)) {
scsiio_req->msg_flags |=
MPI3_SCSIIO_MSGFLAGS_DIVERT_TO_FIRMWARE;
*scsiio_flags |=
MPI3_SCSIIO_FLAGS_DIVERT_REASON_WRITE_SAME_TOO_LARGE;
}
}
/**
* mpi3mr_eh_host_reset - Host reset error handling callback
* @scmd: SCSI command reference
@ -4436,7 +4492,6 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
unsigned long flags;
int retval = 0;
struct sas_rphy *rphy = NULL;
bool update_stgt_priv_data = false;
scsi_tgt_priv_data = kzalloc(sizeof(*scsi_tgt_priv_data), GFP_KERNEL);
if (!scsi_tgt_priv_data)
@ -4445,39 +4500,50 @@ static int mpi3mr_target_alloc(struct scsi_target *starget)
starget->hostdata = scsi_tgt_priv_data;
spin_lock_irqsave(&mrioc->tgtdev_lock, flags);
if (starget->channel == mrioc->scsi_device_channel) {
tgt_dev = __mpi3mr_get_tgtdev_by_perst_id(mrioc, starget->id);
if (tgt_dev && !tgt_dev->is_hidden)
update_stgt_priv_data = true;
else
if (tgt_dev && !tgt_dev->is_hidden) {
scsi_tgt_priv_data->starget = starget;
scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;
scsi_tgt_priv_data->dev_type = tgt_dev->dev_type;
scsi_tgt_priv_data->tgt_dev = tgt_dev;
tgt_dev->starget = starget;
atomic_set(&scsi_tgt_priv_data->block_io, 0);
retval = 0;
if ((tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_PCIE) &&
((tgt_dev->dev_spec.pcie_inf.dev_info &
MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_MASK) ==
MPI3_DEVICE0_PCIE_DEVICE_INFO_TYPE_NVME_DEVICE) &&
((tgt_dev->dev_spec.pcie_inf.dev_info &
MPI3_DEVICE0_PCIE_DEVICE_INFO_PITYPE_MASK) !=
MPI3_DEVICE0_PCIE_DEVICE_INFO_PITYPE_0))
scsi_tgt_priv_data->dev_nvme_dif = 1;
scsi_tgt_priv_data->io_throttle_enabled = tgt_dev->io_throttle_enabled;
scsi_tgt_priv_data->wslen = tgt_dev->wslen;
if (tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_VD)
scsi_tgt_priv_data->throttle_group = tgt_dev->dev_spec.vd_inf.tg;
} else
retval = -ENXIO;
} else if (mrioc->sas_transport_enabled && !starget->channel) {
rphy = dev_to_rphy(starget->dev.parent);
tgt_dev = __mpi3mr_get_tgtdev_by_addr_and_rphy(mrioc,
rphy->identify.sas_address, rphy);
if (tgt_dev && !tgt_dev->is_hidden && !tgt_dev->non_stl &&
(tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_SAS_SATA))
update_stgt_priv_data = true;
else
(tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_SAS_SATA)) {
scsi_tgt_priv_data->starget = starget;
scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;
scsi_tgt_priv_data->dev_type = tgt_dev->dev_type;
scsi_tgt_priv_data->tgt_dev = tgt_dev;
scsi_tgt_priv_data->io_throttle_enabled = tgt_dev->io_throttle_enabled;
scsi_tgt_priv_data->wslen = tgt_dev->wslen;
tgt_dev->starget = starget;
atomic_set(&scsi_tgt_priv_data->block_io, 0);
retval = 0;
} else
retval = -ENXIO;
}
if (update_stgt_priv_data) {
scsi_tgt_priv_data->starget = starget;
scsi_tgt_priv_data->dev_handle = tgt_dev->dev_handle;
scsi_tgt_priv_data->perst_id = tgt_dev->perst_id;
scsi_tgt_priv_data->dev_type = tgt_dev->dev_type;
scsi_tgt_priv_data->tgt_dev = tgt_dev;
tgt_dev->starget = starget;
atomic_set(&scsi_tgt_priv_data->block_io, 0);
retval = 0;
scsi_tgt_priv_data->io_throttle_enabled =
tgt_dev->io_throttle_enabled;
if (tgt_dev->dev_type == MPI3_DEVICE_DEVFORM_VD)
scsi_tgt_priv_data->throttle_group =
tgt_dev->dev_spec.vd_inf.tg;
}
spin_unlock_irqrestore(&mrioc->tgtdev_lock, flags);
return retval;
@ -4738,6 +4804,10 @@ static int mpi3mr_qcmd(struct Scsi_Host *shost,
mpi3mr_setup_eedp(mrioc, scmd, scsiio_req);
if (stgt_priv_data->wslen)
mpi3mr_setup_divert_ws(mrioc, scmd, scsiio_req, &scsiio_flags,
stgt_priv_data->wslen);
memcpy(scsiio_req->cdb.cdb32, scmd->cmnd, scmd->cmd_len);
scsiio_req->data_length = cpu_to_le32(scsi_bufflen(scmd));
scsiio_req->dev_handle = cpu_to_le16(dev_handle);