Commit 9cb83c75 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Jens Axboe

[SCSI] add use_sg_chaining option to scsi_host_template

This option is true if a low-level driver can support sg
chaining. This will be removed eventually when all the drivers are
converted to support sg chaining. q->max_phys_segments is set to
SCSI_MAX_SG_SEGMENTS if false.
Signed-off-by: default avatarFUJITA Tomonori <[email protected]>
Signed-off-by: default avatarJens Axboe <[email protected]>
parent c0dcffd7
......@@ -360,6 +360,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = 1024,
.cmd_per_lun = SIMSCSI_REQ_QUEUE_LEN,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int __init
......
......@@ -1990,6 +1990,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = TW_MAX_SECTORS,
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = twa_host_attrs,
.emulated = 1
};
......
......@@ -2261,6 +2261,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = TW_MAX_SECTORS,
.cmd_per_lun = TW_MAX_CMDS_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = tw_host_attrs,
.emulated = 1
};
......
......@@ -3575,6 +3575,7 @@ static struct scsi_host_template Bus_Logic_template = {
.unchecked_isa_dma = 1,
.max_sectors = 128,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
/*
......
......@@ -1066,7 +1066,8 @@ static struct scsi_host_template driver_template =
.sg_tablesize = 32 /*SG_ALL*/ /*SG_NONE*/,
.cmd_per_lun = 1 /* commands per lun */,
.unchecked_isa_dma = 1 /* unchecked_isa_dma */,
.use_clustering = ENABLE_CLUSTERING
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"
......
......@@ -1071,6 +1071,7 @@ static struct scsi_host_template inia100_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int __devinit inia100_probe_one(struct pci_dev *pdev,
......
......@@ -944,6 +944,7 @@ static struct scsi_host_template aac_driver_template = {
.cmd_per_lun = AAC_NUM_IO_FIB,
#endif
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.emulated = 1,
};
......
......@@ -563,6 +563,7 @@ static struct scsi_host_template aha1740_template = {
.sg_tablesize = AHA1740_SCATTER,
.cmd_per_lun = AHA1740_CMDLUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = aha1740_eh_abort_handler,
};
......
......@@ -766,6 +766,7 @@ struct scsi_host_template aic79xx_driver_template = {
.max_sectors = 8192,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.slave_alloc = ahd_linux_slave_alloc,
.slave_configure = ahd_linux_slave_configure,
.target_alloc = ahd_linux_target_alloc,
......
......@@ -747,6 +747,7 @@ struct scsi_host_template aic7xxx_driver_template = {
.max_sectors = 8192,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.slave_alloc = ahc_linux_slave_alloc,
.slave_configure = ahc_linux_slave_configure,
.target_alloc = ahc_linux_target_alloc,
......
......@@ -11142,6 +11142,7 @@ static struct scsi_host_template driver_template = {
.max_sectors = 2048,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"
......
......@@ -122,6 +122,7 @@ static struct scsi_host_template arcmsr_scsi_host_template = {
.max_sectors = ARCMSR_MAX_XFER_SECTORS,
.cmd_per_lun = ARCMSR_MAX_CMD_PERLUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = arcmsr_host_attrs,
};
#ifdef CONFIG_SCSI_ARCMSR_AER
......
......@@ -4765,6 +4765,7 @@ static struct scsi_host_template dc395x_driver_template = {
.eh_bus_reset_handler = dc395x_eh_bus_reset,
.unchecked_isa_dma = 0,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
......
......@@ -3295,6 +3295,7 @@ static struct scsi_host_template adpt_template = {
.this_id = 7,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static s32 adpt_scsi_register(adpt_hba* pHba)
......
......@@ -523,7 +523,8 @@ static struct scsi_host_template driver_template = {
.slave_configure = eata2x_slave_configure,
.this_id = 7,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
......
......@@ -343,6 +343,7 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->use_clustering = sht->use_clustering;
shost->ordered_tag = sht->ordered_tag;
shost->active_mode = sht->supported_mode;
shost->use_sg_chaining = sht->use_sg_chaining;
if (sht->max_host_blocked)
shost->max_host_blocked = sht->max_host_blocked;
......
......@@ -655,6 +655,7 @@ static struct scsi_host_template driver_template = {
.unchecked_isa_dma = 0,
.emulated = 0,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.proc_name = driver_name,
.shost_attrs = hptiop_attrs,
.this_id = -1,
......
......@@ -1501,6 +1501,7 @@ static struct scsi_host_template ibmmca_driver_template = {
.sg_tablesize = 16,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int ibmmca_probe(struct device *dev)
......
......@@ -1548,6 +1548,7 @@ static struct scsi_host_template driver_template = {
.this_id = -1,
.sg_tablesize = SG_ALL,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = ibmvscsi_attrs,
};
......
......@@ -2831,6 +2831,7 @@ static struct scsi_host_template initio_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int initio_probe_one(struct pci_dev *pdev,
......
......@@ -1438,6 +1438,7 @@ struct scsi_host_template lpfc_template = {
.scan_finished = lpfc_scan_finished,
.this_id = -1,
.sg_tablesize = LPFC_SG_SEG_CNT,
.use_sg_chaining = ENABLE_SG_CHAINING,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = lpfc_hba_attrs,
......@@ -1460,6 +1461,7 @@ struct scsi_host_template lpfc_vport_template = {
.sg_tablesize = LPFC_SG_SEG_CNT,
.cmd_per_lun = LPFC_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = lpfc_vport_attrs,
.max_sectors = 0xFFFF,
};
......@@ -402,6 +402,7 @@ static struct scsi_host_template mac53c94_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int mac53c94_probe(struct macio_dev *mdev, const struct of_device_id *match)
......
......@@ -4492,6 +4492,7 @@ static struct scsi_host_template megaraid_template = {
.sg_tablesize = MAX_SGLIST,
.cmd_per_lun = DEF_CMD_PER_LUN,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = megaraid_abort,
.eh_device_reset_handler = megaraid_reset,
.eh_bus_reset_handler = megaraid_reset,
......
......@@ -361,6 +361,7 @@ static struct scsi_host_template megaraid_template_g = {
.eh_host_reset_handler = megaraid_reset_handler,
.change_queue_depth = megaraid_change_queue_depth,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sdev_attrs = megaraid_sdev_attrs,
.shost_attrs = megaraid_shost_attrs,
};
......
......@@ -1110,6 +1110,7 @@ static struct scsi_host_template megasas_template = {
.eh_timed_out = megasas_reset_timer,
.bios_param = megasas_bios_param,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
/**
......
......@@ -1843,6 +1843,7 @@ static struct scsi_host_template mesh_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 2,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int mesh_probe(struct macio_dev *mdev, const struct of_device_id *match)
......
......@@ -281,6 +281,7 @@ static struct scsi_host_template nsp32_template = {
.cmd_per_lun = 1,
.this_id = NSP32_HOST_SCSIID,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.eh_abort_handler = nsp32_eh_abort,
.eh_bus_reset_handler = nsp32_eh_bus_reset,
.eh_host_reset_handler = nsp32_eh_host_reset,
......
......@@ -694,6 +694,7 @@ static struct scsi_host_template sym53c500_driver_template = {
.sg_tablesize = 32,
.cmd_per_lun = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.shost_attrs = SYM53C500_shost_attrs
};
......
......@@ -132,6 +132,7 @@ struct scsi_host_template qla2x00_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
/*
......@@ -163,6 +164,7 @@ struct scsi_host_template qla24xx_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
......
......@@ -94,6 +94,7 @@ static struct scsi_host_template qla4xxx_driver_template = {
.this_id = -1,
.cmd_per_lun = 3,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.sg_tablesize = SG_ALL,
.max_sectors = 0xFFFF,
......
......@@ -197,6 +197,7 @@ static struct scsi_host_template qlogicfas_driver_template = {
.sg_tablesize = SG_ALL,
.cmd_per_lun = 1,
.use_clustering = DISABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static __init int qlogicfas_init(void)
......
......@@ -1645,7 +1645,10 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost,
* converted, so better keep it safe.
*/
#ifdef ARCH_HAS_SG_CHAIN
blk_queue_max_phys_segments(q, SCSI_MAX_SG_CHAIN_SEGMENTS);
if (shost->use_sg_chaining)
blk_queue_max_phys_segments(q, SCSI_MAX_SG_CHAIN_SEGMENTS);
else
blk_queue_max_phys_segments(q, SCSI_MAX_SG_SEGMENTS);
#else
blk_queue_max_phys_segments(q, SCSI_MAX_SG_SEGMENTS);
#endif
......
......@@ -1123,6 +1123,7 @@ static struct scsi_host_template driver_template = {
.this_id = -1,
.sg_tablesize = ST_MAX_SG,
.cmd_per_lun = ST_CMD_PER_LUN,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
static int stex_set_dma_mask(struct pci_dev * pdev)
......
......@@ -854,5 +854,6 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = 1,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"
......@@ -1808,6 +1808,7 @@ static struct scsi_host_template sym2_template = {
.eh_host_reset_handler = sym53c8xx_eh_host_reset_handler,
.this_id = 7,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
.max_sectors = 0xFFFF,
#ifdef SYM_LINUX_PROC_INFO_SUPPORT
.proc_info = sym53c8xx_proc_info,
......
......@@ -451,6 +451,7 @@ static struct scsi_host_template driver_template = {
.this_id = 7,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#if !defined(__BIG_ENDIAN_BITFIELD) && !defined(__LITTLE_ENDIAN_BITFIELD)
......
......@@ -1197,5 +1197,6 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = ULTRASTOR_MAX_CMDS_PER_LUN,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"
......@@ -1671,6 +1671,7 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = 1,
.unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
.use_sg_chaining = ENABLE_SG_CHAINING,
};
#include "scsi_module.c"
......@@ -39,6 +39,9 @@ struct blk_queue_tags;
#define DISABLE_CLUSTERING 0
#define ENABLE_CLUSTERING 1
#define DISABLE_SG_CHAINING 0
#define ENABLE_SG_CHAINING 1
enum scsi_eh_timer_return {
EH_NOT_HANDLED,
EH_HANDLED,
......@@ -442,6 +445,15 @@ struct scsi_host_template {
*/
unsigned ordered_tag:1;
/*
* true if the low-level driver can support sg chaining. this
* will be removed eventually when all the drivers are
* converted to support sg chaining.
*
* Status: OBSOLETE
*/
unsigned use_sg_chaining:1;
/*
* Countdown for host blocking with no commands outstanding
*/
......@@ -586,6 +598,7 @@ struct Scsi_Host {
unsigned unchecked_isa_dma:1;
unsigned use_clustering:1;
unsigned use_blk_tcq:1;
unsigned use_sg_chaining:1;
/*
* Host has requested that no further requests come through for the
......
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