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scsi: rename SCSI_MAX_{SG, SG_CHAIN}_SEGMENTS 

Rename SCSI_MAX_SG_SEGMENTS to SG_CHUNK_SIZE, which means the amount
we fit into a single scatterlist chunk.

Rename SCSI_MAX_SG_CHAIN_SEGMENTS to SG_MAX_SEGMENTS.

Will move these 2 generic definitions to scatterlist.h later.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Bart Van Assche <bart.vanassche@sandisk.com> (for ib_srp changes)
Signed-off-by: Ming Lin <ming.l@ssi.samsung.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lin 2016-04-04 14:48:10 -07:00 committed by Martin K. Petersen
parent 001d63be61
commit 65e8617fba
14 changed files with 36 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/ata/pata_icside.c
View File

@ -294,7 +294,7 @@ static int icside_dma_init(struct pata_icside_info *info)
static struct scsi_host_template pata_icside_sht = {
ATA_BASE_SHT(DRV_NAME),
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
.dma_boundary = IOMD_DMA_BOUNDARY,
};

4
drivers/infiniband/ulp/srp/ib_srp.c
View File

@ -81,7 +81,7 @@ MODULE_PARM_DESC(cmd_sg_entries,
module_param(indirect_sg_entries, uint, 0444);
MODULE_PARM_DESC(indirect_sg_entries,
"Default max number of gather/scatter entries (default is 12, max is " __stringify(SCSI_MAX_SG_CHAIN_SEGMENTS) ")");
"Default max number of gather/scatter entries (default is 12, max is " __stringify(SG_MAX_SEGMENTS) ")");
module_param(allow_ext_sg, bool, 0444);
MODULE_PARM_DESC(allow_ext_sg,
@ -3097,7 +3097,7 @@ static int srp_parse_options(const char *buf, struct srp_target_port *target)
case SRP_OPT_SG_TABLESIZE:
if (match_int(args, &token) || token < 1 ||
token > SCSI_MAX_SG_CHAIN_SEGMENTS) {
token > SG_MAX_SEGMENTS) {
pr_warn("bad max sg_tablesize parameter '%s'\n",
p);
goto out;

2
drivers/scsi/arm/cumana_2.c
View File

@ -365,7 +365,7 @@ static struct scsi_host_template cumanascsi2_template = {
.eh_abort_handler = fas216_eh_abort,
.can_queue = 1,
.this_id = 7,
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
.dma_boundary = IOMD_DMA_BOUNDARY,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "cumanascsi2",

2
drivers/scsi/arm/eesox.c
View File

@ -484,7 +484,7 @@ static struct scsi_host_template eesox_template = {
.eh_abort_handler = fas216_eh_abort,
.can_queue = 1,
.this_id = 7,
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
.dma_boundary = IOMD_DMA_BOUNDARY,
.use_clustering = DISABLE_CLUSTERING,
.proc_name = "eesox",

2
drivers/scsi/arm/powertec.c
View File

@ -291,7 +291,7 @@ static struct scsi_host_template powertecscsi_template = {
.can_queue = 8,
.this_id = 7,
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
.dma_boundary = IOMD_DMA_BOUNDARY,
.cmd_per_lun = 2,
.use_clustering = ENABLE_CLUSTERING,

4
drivers/scsi/esas2r/esas2r_main.c
View File

@ -246,7 +246,7 @@ static struct scsi_host_template driver_template = {
.eh_target_reset_handler = esas2r_target_reset,
.can_queue = 128,
.this_id = -1,
.sg_tablesize = SCSI_MAX_SG_SEGMENTS,
.sg_tablesize = SG_CHUNK_SIZE,
.cmd_per_lun =
ESAS2R_DEFAULT_CMD_PER_LUN,
.present = 0,
@ -271,7 +271,7 @@ module_param(num_sg_lists, int, 0);
MODULE_PARM_DESC(num_sg_lists,
"Number of scatter/gather lists. Default 1024.");
int sg_tablesize = SCSI_MAX_SG_SEGMENTS;
int sg_tablesize = SG_CHUNK_SIZE;
module_param(sg_tablesize, int, 0);
MODULE_PARM_DESC(sg_tablesize,
"Maximum number of entries in a scatter/gather table.");

2
drivers/scsi/hisi_sas/hisi_sas.h
View File

@ -298,7 +298,7 @@ struct hisi_sas_command_table_stp {
u8 atapi_cdb[ATAPI_CDB_LEN];
};
#define HISI_SAS_SGE_PAGE_CNT SCSI_MAX_SG_SEGMENTS
#define HISI_SAS_SGE_PAGE_CNT SG_CHUNK_SIZE
struct hisi_sas_sge_page {
struct hisi_sas_sge sge[HISI_SAS_SGE_PAGE_CNT];
};

4
drivers/scsi/mpt3sas/mpt3sas_base.c
View File

@ -3207,10 +3207,10 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
sg_tablesize = MPT_MIN_PHYS_SEGMENTS;
else if (sg_tablesize > MPT_MAX_PHYS_SEGMENTS) {
sg_tablesize = min_t(unsigned short, sg_tablesize,
SCSI_MAX_SG_CHAIN_SEGMENTS);
SG_MAX_SEGMENTS);
pr_warn(MPT3SAS_FMT
"sg_tablesize(%u) is bigger than kernel"
" defined SCSI_MAX_SG_SEGMENTS(%u)\n", ioc->name,
" defined SG_CHUNK_SIZE(%u)\n", ioc->name,
sg_tablesize, MPT_MAX_PHYS_SEGMENTS);
}
ioc->shost->sg_tablesize = sg_tablesize;

2
drivers/scsi/mpt3sas/mpt3sas_base.h
View File

@ -90,7 +90,7 @@
/*
* Set MPT3SAS_SG_DEPTH value based on user input.
*/
#define MPT_MAX_PHYS_SEGMENTS SCSI_MAX_SG_SEGMENTS
#define MPT_MAX_PHYS_SEGMENTS SG_CHUNK_SIZE
#define MPT_MIN_PHYS_SEGMENTS 16
#ifdef CONFIG_SCSI_MPT3SAS_MAX_SGE

2
drivers/scsi/scsi_debug.c
View File

@ -5305,7 +5305,7 @@ static struct scsi_host_template sdebug_driver_template = {
.eh_host_reset_handler = scsi_debug_host_reset,
.can_queue = SCSI_DEBUG_CANQUEUE,
.this_id = 7,
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
.cmd_per_lun = DEF_CMD_PER_LUN,
.max_sectors = -1U,
.use_clustering = DISABLE_CLUSTERING,

34
drivers/scsi/scsi_lib.c
View File

@ -51,25 +51,25 @@ struct sg_pool {
};
#define SP(x) { .size = x, "sgpool-" __stringify(x) }
#if (SCSI_MAX_SG_SEGMENTS < 32)
#error SCSI_MAX_SG_SEGMENTS is too small (must be 32 or greater)
#if (SG_CHUNK_SIZE < 32)
#error SG_CHUNK_SIZE is too small (must be 32 or greater)
#endif
static struct sg_pool sg_pools[] = {
SP(8),
SP(16),
#if (SCSI_MAX_SG_SEGMENTS > 32)
#if (SG_CHUNK_SIZE > 32)
SP(32),
#if (SCSI_MAX_SG_SEGMENTS > 64)
#if (SG_CHUNK_SIZE > 64)
SP(64),
#if (SCSI_MAX_SG_SEGMENTS > 128)
#if (SG_CHUNK_SIZE > 128)
SP(128),
#if (SCSI_MAX_SG_SEGMENTS > 256)
#error SCSI_MAX_SG_SEGMENTS is too large (256 MAX)
#if (SG_CHUNK_SIZE > 256)
#error SG_CHUNK_SIZE is too large (256 MAX)
#endif
#endif
#endif
#endif
SP(SCSI_MAX_SG_SEGMENTS)
SP(SG_CHUNK_SIZE)
};
#undef SP
@ -557,7 +557,7 @@ static inline unsigned int sg_pool_index(unsigned short nents)
{
unsigned int index;
BUG_ON(nents > SCSI_MAX_SG_SEGMENTS);
BUG_ON(nents > SG_CHUNK_SIZE);
if (nents <= 8)
index = 0;
@ -585,9 +585,9 @@ static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask)
static void sg_free_table_chained(struct sg_table *table, bool first_chunk)
{
if (first_chunk && table->orig_nents <= SCSI_MAX_SG_SEGMENTS)
if (first_chunk && table->orig_nents <= SG_CHUNK_SIZE)
return;
__sg_free_table(table, SCSI_MAX_SG_SEGMENTS, first_chunk, sg_pool_free);
__sg_free_table(table, SG_CHUNK_SIZE, first_chunk, sg_pool_free);
}
static int sg_alloc_table_chained(struct sg_table *table, int nents,
@ -598,14 +598,14 @@ static int sg_alloc_table_chained(struct sg_table *table, int nents,
BUG_ON(!nents);
if (first_chunk) {
if (nents <= SCSI_MAX_SG_SEGMENTS) {
if (nents <= SG_CHUNK_SIZE) {
table->nents = table->orig_nents = nents;
sg_init_table(table->sgl, nents);
return 0;
}
}
ret = __sg_alloc_table(table, nents, SCSI_MAX_SG_SEGMENTS,
ret = __sg_alloc_table(table, nents, SG_CHUNK_SIZE,
first_chunk, GFP_ATOMIC, sg_pool_alloc);
if (unlikely(ret))
sg_free_table_chained(table, (bool)first_chunk);
@ -1937,7 +1937,7 @@ static int scsi_mq_prep_fn(struct request *req)
if (scsi_host_get_prot(shost)) {
cmd->prot_sdb = (void *)sg +
min_t(unsigned int,
shost->sg_tablesize, SCSI_MAX_SG_SEGMENTS) *
shost->sg_tablesize, SG_CHUNK_SIZE) *
sizeof(struct scatterlist);
memset(cmd->prot_sdb, 0, sizeof(struct scsi_data_buffer));
@ -2110,7 +2110,7 @@ static void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
* this limit is imposed by hardware restrictions
*/
blk_queue_max_segments(q, min_t(unsigned short, shost->sg_tablesize,
SCSI_MAX_SG_CHAIN_SEGMENTS));
SG_MAX_SEGMENTS));
if (scsi_host_prot_dma(shost)) {
shost->sg_prot_tablesize =
@ -2192,8 +2192,8 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost)
unsigned int cmd_size, sgl_size, tbl_size;
tbl_size = shost->sg_tablesize;
if (tbl_size > SCSI_MAX_SG_SEGMENTS)
tbl_size = SCSI_MAX_SG_SEGMENTS;
if (tbl_size > SG_CHUNK_SIZE)
tbl_size = SG_CHUNK_SIZE;
sgl_size = tbl_size * sizeof(struct scatterlist);
cmd_size = sizeof(struct scsi_cmnd) + shost->hostt->cmd_size + sgl_size;
if (scsi_host_get_prot(shost))

2
drivers/usb/storage/scsiglue.c
View File

@ -563,7 +563,7 @@ static const struct scsi_host_template usb_stor_host_template = {
.target_alloc = target_alloc,
/* lots of sg segments can be handled */
.sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
.sg_tablesize = SG_MAX_SEGMENTS,
/* limit the total size of a transfer to 120 KB */
.max_sectors = 240,

8
include/scsi/scsi.h
View File

@ -24,16 +24,16 @@ enum scsi_timeouts {
* to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order. The
* minimum value is 32
*/
#define SCSI_MAX_SG_SEGMENTS 128
#define SG_CHUNK_SIZE 128
/*
* Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
* Like SG_CHUNK_SIZE, but for archs that have sg chaining. This limit
* is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
*/
#ifdef CONFIG_ARCH_HAS_SG_CHAIN
#define SCSI_MAX_SG_CHAIN_SEGMENTS 2048
#define SG_MAX_SEGMENTS 2048
#else
#define SCSI_MAX_SG_CHAIN_SEGMENTS SCSI_MAX_SG_SEGMENTS
#define SG_MAX_SEGMENTS SG_CHUNK_SIZE
#endif
/*

2
include/scsi/scsi_host.h
View File

@ -37,7 +37,7 @@ struct blk_queue_tags;
* used in one scatter-gather request.
*/
#define SG_NONE 0
#define SG_ALL SCSI_MAX_SG_SEGMENTS
#define SG_ALL SG_CHUNK_SIZE
#define MODE_UNKNOWN 0x00
#define MODE_INITIATOR 0x01