@@ -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
@@ -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,
@@ -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;
@@ -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
@@ -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);
}
/**
@@ -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;
@@ -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,
@@ -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);
@@ -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,
@@ -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]);
@@ -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 */
@@ -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
@@ -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