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scsi: remove the unchecked_isa_dma flag 

Remove the unchecked_isa_dma now that all users are gone.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20210331073001.46776-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-03-31 09:29:58 +02:00 committed by Jens Axboe
parent 9b4c8eaa68
commit aaff5ebaa2
13 changed files with 25 additions and 105 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/scsi/scsi_mid_low_api.rst
View File

@ -1095,10 +1095,6 @@ of interest:
- maximum number of commands that can be queued on devices
controlled by the host. Overridden by LLD calls to
scsi_change_queue_depth().
unchecked_isa_dma
- 1=>only use bottom 16 MB of ram (ISA DMA addressing
restriction), 0=>can use full 32 bit (or better) DMA
address space
no_async_abort
- 1=>Asynchronous aborts are not supported
- 0=>Timed-out commands will be aborted asynchronously

1
drivers/scsi/esas2r/esas2r_main.c
View File

@ -249,7 +249,6 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun =
ESAS2R_DEFAULT_CMD_PER_LUN,
.present = 0,
.unchecked_isa_dma = 0,
.emulated = 0,
.proc_name = ESAS2R_DRVR_NAME,
.change_queue_depth = scsi_change_queue_depth,

7
drivers/scsi/hosts.c
View File

@ -371,13 +371,9 @@ static struct device_type scsi_host_type = {
struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
{
struct Scsi_Host *shost;
gfp_t gfp_mask = GFP_KERNEL;
int index;
if (sht->unchecked_isa_dma && privsize)
gfp_mask |= __GFP_DMA;
shost = kzalloc(sizeof(struct Scsi_Host) + privsize, gfp_mask);
shost = kzalloc(sizeof(struct Scsi_Host) + privsize, GFP_KERNEL);
if (!shost)
return NULL;
@ -419,7 +415,6 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
shost->sg_tablesize = sht->sg_tablesize;
shost->sg_prot_tablesize = sht->sg_prot_tablesize;
shost->cmd_per_lun = sht->cmd_per_lun;
shost->unchecked_isa_dma = sht->unchecked_isa_dma;
shost->no_write_same = sht->no_write_same;
shost->host_tagset = sht->host_tagset;

1
drivers/scsi/scsi_debugfs.c
View File

@ -8,7 +8,6 @@
#define SCSI_CMD_FLAG_NAME(name)[const_ilog2(SCMD_##name)] = #name
static const char *const scsi_cmd_flags[] = {
SCSI_CMD_FLAG_NAME(TAGGED),
SCSI_CMD_FLAG_NAME(UNCHECKED_ISA_DMA),
SCSI_CMD_FLAG_NAME(INITIALIZED),
};
#undef SCSI_CMD_FLAG_NAME

52
drivers/scsi/scsi_lib.c
View File

@ -53,49 +53,16 @@
#endif
static struct kmem_cache *scsi_sense_cache;
static struct kmem_cache *scsi_sense_isadma_cache;
static DEFINE_MUTEX(scsi_sense_cache_mutex);
static void scsi_mq_uninit_cmd(struct scsi_cmnd *cmd);
static inline struct kmem_cache *
scsi_select_sense_cache(bool unchecked_isa_dma)
{
return unchecked_isa_dma ? scsi_sense_isadma_cache : scsi_sense_cache;
}
static void scsi_free_sense_buffer(bool unchecked_isa_dma,
unsigned char *sense_buffer)
{
kmem_cache_free(scsi_select_sense_cache(unchecked_isa_dma),
sense_buffer);
}
static unsigned char *scsi_alloc_sense_buffer(bool unchecked_isa_dma,
gfp_t gfp_mask, int numa_node)
{
return kmem_cache_alloc_node(scsi_select_sense_cache(unchecked_isa_dma),
gfp_mask, numa_node);
}
int scsi_init_sense_cache(struct Scsi_Host *shost)
{
struct kmem_cache *cache;
int ret = 0;
mutex_lock(&scsi_sense_cache_mutex);
cache = scsi_select_sense_cache(shost->unchecked_isa_dma);
if (cache)
goto exit;
if (shost->unchecked_isa_dma) {
scsi_sense_isadma_cache =
kmem_cache_create("scsi_sense_cache(DMA)",
SCSI_SENSE_BUFFERSIZE, 0,
SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA, NULL);
if (!scsi_sense_isadma_cache)
ret = -ENOMEM;
} else {
if (!scsi_sense_cache) {
scsi_sense_cache =
kmem_cache_create_usercopy("scsi_sense_cache",
SCSI_SENSE_BUFFERSIZE, 0, SLAB_HWCACHE_ALIGN,
@ -103,7 +70,6 @@ int scsi_init_sense_cache(struct Scsi_Host *shost)
if (!scsi_sense_cache)
ret = -ENOMEM;
}
exit:
mutex_unlock(&scsi_sense_cache_mutex);
return ret;
}
@ -1748,15 +1714,12 @@ static int scsi_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
unsigned int hctx_idx, unsigned int numa_node)
{
struct Scsi_Host *shost = set->driver_data;
const bool unchecked_isa_dma = shost->unchecked_isa_dma;
struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
struct scatterlist *sg;
int ret = 0;
if (unchecked_isa_dma)
cmd->flags |= SCMD_UNCHECKED_ISA_DMA;
cmd->sense_buffer = scsi_alloc_sense_buffer(unchecked_isa_dma,
GFP_KERNEL, numa_node);
cmd->sense_buffer =
kmem_cache_alloc_node(scsi_sense_cache, GFP_KERNEL, numa_node);
if (!cmd->sense_buffer)
return -ENOMEM;
cmd->req.sense = cmd->sense_buffer;
@ -1770,8 +1733,7 @@ static int scsi_mq_init_request(struct blk_mq_tag_set *set, struct request *rq,
if (shost->hostt->init_cmd_priv) {
ret = shost->hostt->init_cmd_priv(shost, cmd);
if (ret < 0)
scsi_free_sense_buffer(unchecked_isa_dma,
cmd->sense_buffer);
kmem_cache_free(scsi_sense_cache, cmd->sense_buffer);
}
return ret;
@ -1785,8 +1747,7 @@ static void scsi_mq_exit_request(struct blk_mq_tag_set *set, struct request *rq,
if (shost->hostt->exit_cmd_priv)
shost->hostt->exit_cmd_priv(shost, cmd);
scsi_free_sense_buffer(cmd->flags & SCMD_UNCHECKED_ISA_DMA,
cmd->sense_buffer);
kmem_cache_free(scsi_sense_cache, cmd->sense_buffer);
}
static int scsi_map_queues(struct blk_mq_tag_set *set)
@ -1821,8 +1782,6 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
dma_max_mapping_size(dev) >> SECTOR_SHIFT);
}
blk_queue_max_hw_sectors(q, shost->max_sectors);
if (shost->unchecked_isa_dma)
blk_queue_bounce_limit(q, BLK_BOUNCE_ISA);
blk_queue_segment_boundary(q, shost->dma_boundary);
dma_set_seg_boundary(dev, shost->dma_boundary);
@ -1988,7 +1947,6 @@ EXPORT_SYMBOL(scsi_unblock_requests);
void scsi_exit_queue(void)
{
kmem_cache_destroy(scsi_sense_cache);
kmem_cache_destroy(scsi_sense_isadma_cache);
}
/**

6
drivers/scsi/scsi_scan.c
View File

@ -1078,8 +1078,7 @@ static int scsi_probe_and_add_lun(struct scsi_target *starget,
if (!sdev)
goto out;
result = kmalloc(result_len, GFP_KERNEL |
((shost->unchecked_isa_dma) ? __GFP_DMA : 0));
result = kmalloc(result_len, GFP_KERNEL);
if (!result)
goto out_free_sdev;
@ -1336,8 +1335,7 @@ static int scsi_report_lun_scan(struct scsi_target *starget, blist_flags_t bflag
*/
length = (511 + 1) * sizeof(struct scsi_lun);
retry:
lun_data = kmalloc(length, GFP_KERNEL |
(sdev->host->unchecked_isa_dma ? __GFP_DMA : 0));
lun_data = kmalloc(length, GFP_KERNEL);
if (!lun_data) {
printk(ALLOC_FAILURE_MSG, __func__);
goto out;

2
drivers/scsi/scsi_sysfs.c
View File

@ -373,7 +373,6 @@ shost_rd_attr(cmd_per_lun, "%hd\n");
shost_rd_attr(can_queue, "%d\n");
shost_rd_attr(sg_tablesize, "%hu\n");
shost_rd_attr(sg_prot_tablesize, "%hu\n");
shost_rd_attr(unchecked_isa_dma, "%d\n");
shost_rd_attr(prot_capabilities, "%u\n");
shost_rd_attr(prot_guard_type, "%hd\n");
shost_rd_attr2(proc_name, hostt->proc_name, "%s\n");
@ -411,7 +410,6 @@ static struct attribute *scsi_sysfs_shost_attrs[] = {
&dev_attr_can_queue.attr,
&dev_attr_sg_tablesize.attr,
&dev_attr_sg_prot_tablesize.attr,
&dev_attr_unchecked_isa_dma.attr,
&dev_attr_proc_name.attr,
&dev_attr_scan.attr,
&dev_attr_hstate.attr,

10
drivers/scsi/sg.c
View File

@ -974,7 +974,7 @@ sg_ioctl_common(struct file *filp, Sg_device *sdp, Sg_fd *sfp,
*/
return 0;
case SG_GET_LOW_DMA:
return put_user((int) sdp->device->host->unchecked_isa_dma, ip);
return put_user(0, ip);
case SG_GET_SCSI_ID:
{
sg_scsi_id_t v;
@ -1777,7 +1777,6 @@ sg_start_req(Sg_request *srp, unsigned char *cmd)
if (sg_allow_dio && hp->flags & SG_FLAG_DIRECT_IO &&
dxfer_dir != SG_DXFER_UNKNOWN && !iov_count &&
!sfp->parentdp->device->host->unchecked_isa_dma &&
blk_rq_aligned(q, (unsigned long)hp->dxferp, dxfer_len))
md = NULL;
else
@ -1893,7 +1892,6 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
int sg_tablesize = sfp->parentdp->sg_tablesize;
int blk_size = buff_size, order;
gfp_t gfp_mask = GFP_ATOMIC | __GFP_COMP | __GFP_NOWARN | __GFP_ZERO;
struct sg_device *sdp = sfp->parentdp;
if (blk_size < 0)
return -EFAULT;
@ -1919,9 +1917,6 @@ sg_build_indirect(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)
scatter_elem_sz_prev = num;
}
if (sdp->device->host->unchecked_isa_dma)
gfp_mask |= GFP_DMA;
order = get_order(num);
retry:
ret_sz = 1 << (PAGE_SHIFT + order);
@ -2547,8 +2542,7 @@ static void sg_proc_debug_helper(struct seq_file *s, Sg_device * sdp)
"(res)sgat=%d low_dma=%d\n", k,
jiffies_to_msecs(fp->timeout),
fp->reserve.bufflen,
(int) fp->reserve.k_use_sg,
(int) sdp->device->host->unchecked_isa_dma);
(int) fp->reserve.k_use_sg, 0);
seq_printf(s, " cmd_q=%d f_packid=%d k_orphan=%d closed=0\n",
(int) fp->cmd_q, (int) fp->force_packid,
(int) fp->keep_orphan);

12
drivers/scsi/sr_ioctl.c
View File

@ -33,10 +33,6 @@ static int xa_test = 0;
module_param(xa_test, int, S_IRUGO | S_IWUSR);
/* primitive to determine whether we need to have GFP_DMA set based on
* the status of the unchecked_isa_dma flag in the host structure */
#define SR_GFP_DMA(cd) (((cd)->device->host->unchecked_isa_dma) ? GFP_DMA : 0)
static int sr_read_tochdr(struct cdrom_device_info *cdi,
struct cdrom_tochdr *tochdr)
{
@ -45,7 +41,7 @@ static int sr_read_tochdr(struct cdrom_device_info *cdi,
int result;
unsigned char *buffer;
buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
buffer = kmalloc(32, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
@ -75,7 +71,7 @@ static int sr_read_tocentry(struct cdrom_device_info *cdi,
int result;
unsigned char *buffer;
buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
buffer = kmalloc(32, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
@ -384,7 +380,7 @@ int sr_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
{
Scsi_CD *cd = cdi->handle;
struct packet_command cgc;
char *buffer = kmalloc(32, GFP_KERNEL | SR_GFP_DMA(cd));
char *buffer = kmalloc(32, GFP_KERNEL);
int result;
if (!buffer)
@ -567,7 +563,7 @@ int sr_is_xa(Scsi_CD *cd)
if (!xa_test)
return 0;
raw_sector = kmalloc(2048, GFP_KERNEL | SR_GFP_DMA(cd));
raw_sector = kmalloc(2048, GFP_KERNEL);
if (!raw_sector)
return -ENOMEM;
if (0 == sr_read_sector(cd, cd->ms_offset + 16,

20
drivers/scsi/st.c
View File

@ -188,7 +188,7 @@ static int st_max_sg_segs = ST_MAX_SG;
static int modes_defined;
static int enlarge_buffer(struct st_buffer *, int, int);
static int enlarge_buffer(struct st_buffer *, int);
static void clear_buffer(struct st_buffer *);
static void normalize_buffer(struct st_buffer *);
static int append_to_buffer(const char __user *, struct st_buffer *, int);
@ -1289,7 +1289,7 @@ static int st_open(struct inode *inode, struct file *filp)
}
/* See that we have at least a one page buffer available */
if (!enlarge_buffer(STp->buffer, PAGE_SIZE, STp->restr_dma)) {
if (!enlarge_buffer(STp->buffer, PAGE_SIZE)) {
st_printk(KERN_WARNING, STp,
"Can't allocate one page tape buffer.\n");
retval = (-EOVERFLOW);
@ -1586,7 +1586,7 @@ static int setup_buffering(struct scsi_tape *STp, const char __user *buf,
}
if (bufsize > STbp->buffer_size &&
!enlarge_buffer(STbp, bufsize, STp->restr_dma)) {
!enlarge_buffer(STbp, bufsize)) {
st_printk(KERN_WARNING, STp,
"Can't allocate %d byte tape buffer.\n",
bufsize);
@ -3894,7 +3894,7 @@ static long st_compat_ioctl(struct file *file, unsigned int cmd_in, unsigned lon
/* Try to allocate a new tape buffer. Calling function must not hold
dev_arr_lock. */
static struct st_buffer *new_tape_buffer(int need_dma, int max_sg)
static struct st_buffer *new_tape_buffer(int max_sg)
{
struct st_buffer *tb;
@ -3905,7 +3905,6 @@ static struct st_buffer *new_tape_buffer(int need_dma, int max_sg)
}
tb->frp_segs = 0;
tb->use_sg = max_sg;
tb->dma = need_dma;
tb->buffer_size = 0;
tb->reserved_pages = kcalloc(max_sg, sizeof(struct page *),
@ -3922,7 +3921,7 @@ static struct st_buffer *new_tape_buffer(int need_dma, int max_sg)
/* Try to allocate enough space in the tape buffer */
#define ST_MAX_ORDER 6
static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dma)
static int enlarge_buffer(struct st_buffer * STbuffer, int new_size)
{
int segs, max_segs, b_size, order, got;
gfp_t priority;
@ -3936,8 +3935,6 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm
max_segs = STbuffer->use_sg;
priority = GFP_KERNEL | __GFP_NOWARN;
if (need_dma)
priority |= GFP_DMA;
if (STbuffer->cleared)
priority |= __GFP_ZERO;
@ -3957,7 +3954,7 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm
if (order == ST_MAX_ORDER)
return 0;
normalize_buffer(STbuffer);
return enlarge_buffer(STbuffer, new_size, need_dma);
return enlarge_buffer(STbuffer, new_size);
}
for (segs = STbuffer->frp_segs, got = STbuffer->buffer_size;
@ -4296,7 +4293,7 @@ static int st_probe(struct device *dev)
i = queue_max_segments(SDp->request_queue);
if (st_max_sg_segs < i)
i = st_max_sg_segs;
buffer = new_tape_buffer((SDp->host)->unchecked_isa_dma, i);
buffer = new_tape_buffer(i);
if (buffer == NULL) {
sdev_printk(KERN_ERR, SDp,
"st: Can't allocate new tape buffer. "
@ -4340,7 +4337,6 @@ static int st_probe(struct device *dev)
tpnt->dirty = 0;
tpnt->in_use = 0;
tpnt->drv_buffer = 1; /* Try buffering if no mode sense */
tpnt->restr_dma = (SDp->host)->unchecked_isa_dma;
tpnt->use_pf = (SDp->scsi_level >= SCSI_2);
tpnt->density = 0;
tpnt->do_auto_lock = ST_AUTO_LOCK;
@ -4358,7 +4354,7 @@ static int st_probe(struct device *dev)
tpnt->nbr_partitions = 0;
blk_queue_rq_timeout(tpnt->device->request_queue, ST_TIMEOUT);
tpnt->long_timeout = ST_LONG_TIMEOUT;
tpnt->try_dio = try_direct_io && !SDp->host->unchecked_isa_dma;
tpnt->try_dio = try_direct_io;
for (i = 0; i < ST_NBR_MODES; i++) {
STm = &(tpnt->modes[i]);

2
drivers/scsi/st.h
View File

@ -35,7 +35,6 @@ struct st_request {
/* The tape buffer descriptor. */
struct st_buffer {
unsigned char dma; /* DMA-able buffer */
unsigned char cleared; /* internal buffer cleared after open? */
unsigned short do_dio; /* direct i/o set up? */
int buffer_size;
@ -133,7 +132,6 @@ struct scsi_tape {
unsigned char two_fm;
unsigned char fast_mteom;
unsigned char immediate;
unsigned char restr_dma;
unsigned char scsi2_logical;
unsigned char default_drvbuffer; /* 0xff = don't touch, value 3 bits */
unsigned char cln_mode; /* 0 = none, otherwise sense byte nbr */

7
include/scsi/scsi_cmnd.h
View File

@ -55,11 +55,10 @@ struct scsi_pointer {
/* for scmd->flags */
#define SCMD_TAGGED (1 << 0)
#define SCMD_UNCHECKED_ISA_DMA (1 << 1)
#define SCMD_INITIALIZED (1 << 2)
#define SCMD_LAST (1 << 3)
#define SCMD_INITIALIZED (1 << 1)
#define SCMD_LAST (1 << 2)
/* flags preserved across unprep / reprep */
#define SCMD_PRESERVED_FLAGS (SCMD_UNCHECKED_ISA_DMA | SCMD_INITIALIZED)
#define SCMD_PRESERVED_FLAGS (SCMD_INITIALIZED)
/* for scmd->state */
#define SCMD_STATE_COMPLETE 0

6
include/scsi/scsi_host.h
View File

@ -424,11 +424,6 @@ struct scsi_host_template {
*/
unsigned supported_mode:2;
/*
* True if this host adapter uses unchecked DMA onto an ISA bus.
*/
unsigned unchecked_isa_dma:1;
/*
* True for emulated SCSI host adapters (e.g. ATAPI).
*/
@ -617,7 +612,6 @@ struct Scsi_Host {
*/
unsigned nr_hw_queues;
unsigned active_mode:2;
unsigned unchecked_isa_dma:1;
/*
* Host has requested that no further requests come through for the