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authorChristoph Hellwig <hch@infradead.org>2012-03-26 08:56:41 (GMT)
committerNicholas Bellinger <nab@linux-iscsi.org>2012-04-15 00:40:30 (GMT)
commit8feb58d04b23e65c3d302f063544f3a1ae65e887 (patch)
tree2d949f1a92bf277c8ccac669c187ecd4f527a74b /drivers/target
parentb0d7994660af1601cc26ef7ab748569fdb9c253b (diff)
downloadlinux-8feb58d04b23e65c3d302f063544f3a1ae65e887.tar.xz
target: misc ramdisk backend cleanups
Remove various leftovers of the old direct/indirect split, as well as the unused rd_request structure and a couple unused defines and fields. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_rd.c147
-rw-r--r--drivers/target/target_core_rd.h19
2 files changed, 41 insertions, 125 deletions
diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 8b68f7b..2a89187 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -199,10 +199,7 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
return 0;
}
-static void *rd_allocate_virtdevice(
- struct se_hba *hba,
- const char *name,
- int rd_direct)
+static void *rd_allocate_virtdevice(struct se_hba *hba, const char *name)
{
struct rd_dev *rd_dev;
struct rd_host *rd_host = hba->hba_ptr;
@@ -214,25 +211,12 @@ static void *rd_allocate_virtdevice(
}
rd_dev->rd_host = rd_host;
- rd_dev->rd_direct = rd_direct;
return rd_dev;
}
-static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name)
-{
- return rd_allocate_virtdevice(hba, name, 0);
-}
-
-/* rd_create_virtdevice():
- *
- *
- */
-static struct se_device *rd_create_virtdevice(
- struct se_hba *hba,
- struct se_subsystem_dev *se_dev,
- void *p,
- int rd_direct)
+static struct se_device *rd_create_virtdevice(struct se_hba *hba,
+ struct se_subsystem_dev *se_dev, void *p)
{
struct se_device *dev;
struct se_dev_limits dev_limits;
@@ -247,9 +231,8 @@ static struct se_device *rd_create_virtdevice(
if (ret < 0)
goto fail;
- snprintf(prod, 16, "RAMDISK-%s", (rd_dev->rd_direct) ? "DR" : "MCP");
- snprintf(rev, 4, "%s", (rd_dev->rd_direct) ? RD_DR_VERSION :
- RD_MCP_VERSION);
+ snprintf(prod, 16, "RAMDISK-MCP");
+ snprintf(rev, 4, "%s", RD_MCP_VERSION);
dev_limits.limits.logical_block_size = RD_BLOCKSIZE;
dev_limits.limits.max_hw_sectors = RD_MAX_SECTORS;
@@ -264,12 +247,10 @@ static struct se_device *rd_create_virtdevice(
goto fail;
rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
- rd_dev->rd_queue_depth = dev->queue_depth;
- pr_debug("CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of"
+ pr_debug("CORE_RD[%u] - Added TCM MEMCPY Ramdisk Device ID: %u of"
" %u pages in %u tables, %lu total bytes\n",
- rd_host->rd_host_id, (!rd_dev->rd_direct) ? "MEMCPY" :
- "DIRECT", rd_dev->rd_dev_id, rd_dev->rd_page_count,
+ rd_host->rd_host_id, rd_dev->rd_dev_id, rd_dev->rd_page_count,
rd_dev->sg_table_count,
(unsigned long)(rd_dev->rd_page_count * PAGE_SIZE));
@@ -280,18 +261,6 @@ fail:
return ERR_PTR(ret);
}
-static struct se_device *rd_MEMCPY_create_virtdevice(
- struct se_hba *hba,
- struct se_subsystem_dev *se_dev,
- void *p)
-{
- return rd_create_virtdevice(hba, se_dev, p, 0);
-}
-
-/* rd_free_device(): (Part of se_subsystem_api_t template)
- *
- *
- */
static void rd_free_device(void *p)
{
struct rd_dev *rd_dev = p;
@@ -300,29 +269,12 @@ static void rd_free_device(void *p)
kfree(rd_dev);
}
-static inline struct rd_request *RD_REQ(struct se_task *task)
-{
- return container_of(task, struct rd_request, rd_task);
-}
-
static struct se_task *
rd_alloc_task(unsigned char *cdb)
{
- struct rd_request *rd_req;
-
- rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL);
- if (!rd_req) {
- pr_err("Unable to allocate struct rd_request\n");
- return NULL;
- }
-
- return &rd_req->rd_task;
+ return kzalloc(sizeof(struct se_task), GFP_KERNEL);
}
-/* rd_get_sg_table():
- *
- *
- */
static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
{
u32 i;
@@ -341,31 +293,41 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
return NULL;
}
-static int rd_MEMCPY(struct rd_request *req, u32 read_rd)
+static int rd_do_task(struct se_task *task)
{
- struct se_task *task = &req->rd_task;
- struct rd_dev *dev = req->rd_task.task_se_cmd->se_dev->dev_ptr;
+ struct se_device *se_dev = task->task_se_cmd->se_dev;
+ struct rd_dev *dev = se_dev->dev_ptr;
struct rd_dev_sg_table *table;
struct scatterlist *rd_sg;
struct sg_mapping_iter m;
- u32 rd_offset = req->rd_offset;
+ u32 rd_offset;
+ u32 rd_size;
+ u32 rd_page;
u32 src_len;
+ u64 tmp;
- table = rd_get_sg_table(dev, req->rd_page);
+ tmp = task->task_lba * se_dev->se_sub_dev->se_dev_attrib.block_size;
+ rd_offset = do_div(tmp, PAGE_SIZE);
+ rd_page = tmp;
+ rd_size = task->task_size;
+
+ table = rd_get_sg_table(dev, rd_page);
if (!table)
return -EINVAL;
- rd_sg = &table->sg_table[req->rd_page - table->page_start_offset];
+ rd_sg = &table->sg_table[rd_page - table->page_start_offset];
pr_debug("RD[%u]: %s LBA: %llu, Size: %u Page: %u, Offset: %u\n",
- dev->rd_dev_id, read_rd ? "Read" : "Write",
- task->task_lba, req->rd_size, req->rd_page,
- rd_offset);
+ dev->rd_dev_id,
+ task->task_data_direction == DMA_FROM_DEVICE ?
+ "Read" : "Write",
+ task->task_lba, rd_size, rd_page, rd_offset);
src_len = PAGE_SIZE - rd_offset;
sg_miter_start(&m, task->task_sg, task->task_sg_nents,
- read_rd ? SG_MITER_TO_SG : SG_MITER_FROM_SG);
- while (req->rd_size) {
+ task->task_data_direction == DMA_FROM_DEVICE ?
+ SG_MITER_TO_SG : SG_MITER_FROM_SG);
+ while (rd_size) {
u32 len;
void *rd_addr;
@@ -375,13 +337,13 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd)
rd_addr = sg_virt(rd_sg) + rd_offset;
- if (read_rd)
+ if (task->task_data_direction == DMA_FROM_DEVICE)
memcpy(m.addr, rd_addr, len);
else
memcpy(rd_addr, m.addr, len);
- req->rd_size -= len;
- if (!req->rd_size)
+ rd_size -= len;
+ if (!rd_size)
continue;
src_len -= len;
@@ -391,15 +353,15 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd)
}
/* rd page completed, next one please */
- req->rd_page++;
+ rd_page++;
rd_offset = 0;
src_len = PAGE_SIZE;
- if (req->rd_page <= table->page_end_offset) {
+ if (rd_page <= table->page_end_offset) {
rd_sg++;
continue;
}
- table = rd_get_sg_table(dev, req->rd_page);
+ table = rd_get_sg_table(dev, rd_page);
if (!table) {
sg_miter_stop(&m);
return -EINVAL;
@@ -409,41 +371,15 @@ static int rd_MEMCPY(struct rd_request *req, u32 read_rd)
rd_sg = table->sg_table;
}
sg_miter_stop(&m);
- return 0;
-}
-
-/* rd_MEMCPY_do_task(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static int rd_MEMCPY_do_task(struct se_task *task)
-{
- struct se_device *dev = task->task_se_cmd->se_dev;
- struct rd_request *req = RD_REQ(task);
- u64 tmp;
- int ret;
-
- tmp = task->task_lba * dev->se_sub_dev->se_dev_attrib.block_size;
- req->rd_offset = do_div(tmp, PAGE_SIZE);
- req->rd_page = tmp;
- req->rd_size = task->task_size;
-
- ret = rd_MEMCPY(req, task->task_data_direction == DMA_FROM_DEVICE);
- if (ret != 0)
- return ret;
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
return 0;
}
-/* rd_free_task(): (Part of se_subsystem_api_t template)
- *
- *
- */
static void rd_free_task(struct se_task *task)
{
- kfree(RD_REQ(task));
+ kfree(task);
}
enum {
@@ -512,9 +448,8 @@ static ssize_t rd_show_configfs_dev_params(
char *b)
{
struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
- ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: %s\n",
- rd_dev->rd_dev_id, (rd_dev->rd_direct) ?
- "rd_direct" : "rd_mcp");
+ ssize_t bl = sprintf(b, "TCM RamDisk ID: %u RamDisk Makeup: rd_mcp\n",
+ rd_dev->rd_dev_id);
bl += sprintf(b + bl, " PAGES/PAGE_SIZE: %u*%lu"
" SG_table_count: %u\n", rd_dev->rd_page_count,
PAGE_SIZE, rd_dev->sg_table_count);
@@ -545,11 +480,11 @@ static struct se_subsystem_api rd_mcp_template = {
.transport_type = TRANSPORT_PLUGIN_VHBA_VDEV,
.attach_hba = rd_attach_hba,
.detach_hba = rd_detach_hba,
- .allocate_virtdevice = rd_MEMCPY_allocate_virtdevice,
- .create_virtdevice = rd_MEMCPY_create_virtdevice,
+ .allocate_virtdevice = rd_allocate_virtdevice,
+ .create_virtdevice = rd_create_virtdevice,
.free_device = rd_free_device,
.alloc_task = rd_alloc_task,
- .do_task = rd_MEMCPY_do_task,
+ .do_task = rd_do_task,
.free_task = rd_free_task,
.check_configfs_dev_params = rd_check_configfs_dev_params,
.set_configfs_dev_params = rd_set_configfs_dev_params,
diff --git a/drivers/target/target_core_rd.h b/drivers/target/target_core_rd.h
index 784e56a..94acec9 100644
--- a/drivers/target/target_core_rd.h
+++ b/drivers/target/target_core_rd.h
@@ -2,7 +2,6 @@
#define TARGET_CORE_RD_H
#define RD_HBA_VERSION "v4.0"
-#define RD_DR_VERSION "4.0"
#define RD_MCP_VERSION "4.0"
/* Largest piece of memory kmalloc can allocate */
@@ -16,22 +15,6 @@
int __init rd_module_init(void);
void rd_module_exit(void);
-#define RRF_EMULATE_CDB 0x01
-#define RRF_GOT_LBA 0x02
-
-struct rd_request {
- struct se_task rd_task;
-
- /* Offset from start of page */
- u32 rd_offset;
- /* Starting page in Ramdisk for request */
- u32 rd_page;
- /* Total number of pages needed for request */
- u32 rd_page_count;
- /* Scatterlist count */
- u32 rd_size;
-} ____cacheline_aligned;
-
struct rd_dev_sg_table {
u32 page_start_offset;
u32 page_end_offset;
@@ -42,7 +25,6 @@ struct rd_dev_sg_table {
#define RDF_HAS_PAGE_COUNT 0x01
struct rd_dev {
- int rd_direct;
u32 rd_flags;
/* Unique Ramdisk Device ID in Ramdisk HBA */
u32 rd_dev_id;
@@ -50,7 +32,6 @@ struct rd_dev {
u32 rd_page_count;
/* Number of SG tables in sg_table_array */
u32 sg_table_count;
- u32 rd_queue_depth;
/* Array of rd_dev_sg_table_t containing scatterlists */
struct rd_dev_sg_table *sg_table_array;
/* Ramdisk HBA device is connected to */