target: Follow up core updates from AGrover and HCH (round 4)

This patch contains the squashed version of forth round series cleanups
from Andy and Christoph following the post heavy lifting in the preceeding:
'Eliminate usage of struct se_mem' and 'Make all control CDBs scatter-gather'
changes.  This also includes a conversion of target core and the v3.0
mainline fabric modules (loopback and tcm_fc) to use pr_debug and the
CONFIG_DYNAMIC_DEBUG infrastructure!

These have been squashed into this third and final round for v3.1.

target: Remove ifdeffed code in t_g_process_write
target: Remove direct ramdisk code
target: Rename task_sg_num to task_sg_nents
target: Remove custom debug macros for pr_debug. Use pr_err().
target: Remove custom debug macros in mainline fabrics
target: Set WSNZ=1 in block limits VPD. Abort if WRITE_SAME sectors = 0
target: Remove transport do_se_mem_map callback
target: Further simplify transport_free_pages
target: Redo task allocation return value handling
target: Remove extra parentheses
target: change alloc_task call to take *cdb, not *cmd

(nab: Fix bogus struct file assignments in fd_do_readv and fd_do_writev)

Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 67 insertions, 386 deletions

diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
index 4f9416d..3dd81d2 100644
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -44,12 +44,8 @@
 
 #include "target_core_rd.h"
 
-static struct se_subsystem_api rd_dr_template;
 static struct se_subsystem_api rd_mcp_template;
 
-/* #define DEBUG_RAMDISK_MCP */
-/* #define DEBUG_RAMDISK_DR */
-
 /*	rd_attach_hba(): (Part of se_subsystem_api_t template)
  *
  *
@@ -59,8 +55,8 @@ static int rd_attach_hba(struct se_hba *hba, u32 host_id)
 	struct rd_host *rd_host;
 
 	rd_host = kzalloc(sizeof(struct rd_host), GFP_KERNEL);
-	if (!(rd_host)) {
-		printk(KERN_ERR "Unable to allocate memory for struct rd_host\n");
+	if (!rd_host) {
+		pr_err("Unable to allocate memory for struct rd_host\n");
 		return -ENOMEM;
 	}
 
@@ -68,10 +64,10 @@ static int rd_attach_hba(struct se_hba *hba, u32 host_id)
 
 	hba->hba_ptr = rd_host;
 
-	printk(KERN_INFO "CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
+	pr_debug("CORE_HBA[%d] - TCM Ramdisk HBA Driver %s on"
 		" Generic Target Core Stack %s\n", hba->hba_id,
 		RD_HBA_VERSION, TARGET_CORE_MOD_VERSION);
-	printk(KERN_INFO "CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic"
+	pr_debug("CORE_HBA[%d] - Attached Ramdisk HBA: %u to Generic"
 		" MaxSectors: %u\n", hba->hba_id,
 		rd_host->rd_host_id, RD_MAX_SECTORS);
 
@@ -82,7 +78,7 @@ static void rd_detach_hba(struct se_hba *hba)
 {
 	struct rd_host *rd_host = hba->hba_ptr;
 
-	printk(KERN_INFO "CORE_HBA[%d] - Detached Ramdisk HBA: %u from"
+	pr_debug("CORE_HBA[%d] - Detached Ramdisk HBA: %u from"
 		" Generic Target Core\n", hba->hba_id, rd_host->rd_host_id);
 
 	kfree(rd_host);
@@ -111,7 +107,7 @@ static void rd_release_device_space(struct rd_dev *rd_dev)
 
 		for (j = 0; j < sg_per_table; j++) {
 			pg = sg_page(&sg[j]);
-			if ((pg)) {
+			if (pg) {
 				__free_page(pg);
 				page_count++;
 			}
@@ -120,7 +116,7 @@ static void rd_release_device_space(struct rd_dev *rd_dev)
 		kfree(sg);
 	}
 
-	printk(KERN_INFO "CORE_RD[%u] - Released device space for Ramdisk"
+	pr_debug("CORE_RD[%u] - Released device space for Ramdisk"
 		" Device ID: %u, pages %u in %u tables total bytes %lu\n",
 		rd_dev->rd_host->rd_host_id, rd_dev->rd_dev_id, page_count,
 		rd_dev->sg_table_count, (unsigned long)page_count * PAGE_SIZE);
@@ -145,7 +141,7 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 	struct scatterlist *sg;
 
 	if (rd_dev->rd_page_count <= 0) {
-		printk(KERN_ERR "Illegal page count: %u for Ramdisk device\n",
+		pr_err("Illegal page count: %u for Ramdisk device\n",
 			rd_dev->rd_page_count);
 		return -EINVAL;
 	}
@@ -154,8 +150,8 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 	sg_tables = (total_sg_needed / max_sg_per_table) + 1;
 
 	sg_table = kzalloc(sg_tables * sizeof(struct rd_dev_sg_table), GFP_KERNEL);
-	if (!(sg_table)) {
-		printk(KERN_ERR "Unable to allocate memory for Ramdisk"
+	if (!sg_table) {
+		pr_err("Unable to allocate memory for Ramdisk"
 			" scatterlist tables\n");
 		return -ENOMEM;
 	}
@@ -169,13 +165,13 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 
 		sg = kzalloc(sg_per_table * sizeof(struct scatterlist),
 				GFP_KERNEL);
-		if (!(sg)) {
-			printk(KERN_ERR "Unable to allocate scatterlist array"
+		if (!sg) {
+			pr_err("Unable to allocate scatterlist array"
 				" for struct rd_dev\n");
 			return -ENOMEM;
 		}
 
-		sg_init_table((struct scatterlist *)&sg[0], sg_per_table);
+		sg_init_table(sg, sg_per_table);
 
 		sg_table[i].sg_table = sg;
 		sg_table[i].rd_sg_count = sg_per_table;
@@ -185,8 +181,8 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 
 		for (j = 0; j < sg_per_table; j++) {
 			pg = alloc_pages(GFP_KERNEL, 0);
-			if (!(pg)) {
-				printk(KERN_ERR "Unable to allocate scatterlist"
+			if (!pg) {
+				pr_err("Unable to allocate scatterlist"
 					" pages for struct rd_dev_sg_table\n");
 				return -ENOMEM;
 			}
@@ -198,7 +194,7 @@ static int rd_build_device_space(struct rd_dev *rd_dev)
 		total_sg_needed -= sg_per_table;
 	}
 
-	printk(KERN_INFO "CORE_RD[%u] - Built Ramdisk Device ID: %u space of"
+	pr_debug("CORE_RD[%u] - Built Ramdisk Device ID: %u space of"
 		" %u pages in %u tables\n", rd_dev->rd_host->rd_host_id,
 		rd_dev->rd_dev_id, rd_dev->rd_page_count,
 		rd_dev->sg_table_count);
@@ -215,8 +211,8 @@ static void *rd_allocate_virtdevice(
 	struct rd_host *rd_host = hba->hba_ptr;
 
 	rd_dev = kzalloc(sizeof(struct rd_dev), GFP_KERNEL);
-	if (!(rd_dev)) {
-		printk(KERN_ERR "Unable to allocate memory for struct rd_dev\n");
+	if (!rd_dev) {
+		pr_err("Unable to allocate memory for struct rd_dev\n");
 		return NULL;
 	}
 
@@ -226,11 +222,6 @@ static void *rd_allocate_virtdevice(
 	return rd_dev;
 }
 
-static void *rd_DIRECT_allocate_virtdevice(struct se_hba *hba, const char *name)
-{
-	return rd_allocate_virtdevice(hba, name, 1);
-}
-
 static void *rd_MEMCPY_allocate_virtdevice(struct se_hba *hba, const char *name)
 {
 	return rd_allocate_virtdevice(hba, name, 0);
@@ -270,16 +261,15 @@ static struct se_device *rd_create_virtdevice(
 	dev_limits.queue_depth = RD_DEVICE_QUEUE_DEPTH;
 
 	dev = transport_add_device_to_core_hba(hba,
-			(rd_dev->rd_direct) ? &rd_dr_template :
 			&rd_mcp_template, se_dev, dev_flags, rd_dev,
 			&dev_limits, prod, rev);
-	if (!(dev))
+	if (!dev)
 		goto fail;
 
 	rd_dev->rd_dev_id = rd_host->rd_host_dev_id_count++;
 	rd_dev->rd_queue_depth = dev->queue_depth;
 
-	printk(KERN_INFO "CORE_RD[%u] - Added TCM %s Ramdisk Device ID: %u of"
+	pr_debug("CORE_RD[%u] - Added TCM %s 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,
@@ -293,14 +283,6 @@ fail:
 	return ERR_PTR(ret);
 }
 
-static struct se_device *rd_DIRECT_create_virtdevice(
-	struct se_hba *hba,
-	struct se_subsystem_dev *se_dev,
-	void *p)
-{
-	return rd_create_virtdevice(hba, se_dev, p, 1);
-}
-
 static struct se_device *rd_MEMCPY_create_virtdevice(
 	struct se_hba *hba,
 	struct se_subsystem_dev *se_dev,
@@ -327,16 +309,15 @@ static inline struct rd_request *RD_REQ(struct se_task *task)
 }
 
 static struct se_task *
-rd_alloc_task(struct se_cmd *cmd)
+rd_alloc_task(unsigned char *cdb)
 {
 	struct rd_request *rd_req;
 
 	rd_req = kzalloc(sizeof(struct rd_request), GFP_KERNEL);
 	if (!rd_req) {
-		printk(KERN_ERR "Unable to allocate struct rd_request\n");
+		pr_err("Unable to allocate struct rd_request\n");
 		return NULL;
 	}
-	rd_req->rd_dev = cmd->se_dev->dev_ptr;
 
 	return &rd_req->rd_task;
 }
@@ -357,7 +338,7 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
 			return sg_table;
 	}
 
-	printk(KERN_ERR "Unable to locate struct rd_dev_sg_table for page: %u\n",
+	pr_err("Unable to locate struct rd_dev_sg_table for page: %u\n",
 			page);
 
 	return NULL;
@@ -370,7 +351,7 @@ static struct rd_dev_sg_table *rd_get_sg_table(struct rd_dev *rd_dev, u32 page)
 static int rd_MEMCPY_read(struct rd_request *req)
 {
 	struct se_task *task = &req->rd_task;
-	struct rd_dev *dev = req->rd_dev;
+	struct rd_dev *dev = req->rd_task.se_dev->dev_ptr;
 	struct rd_dev_sg_table *table;
 	struct scatterlist *sg_d, *sg_s;
 	void *dst, *src;
@@ -379,32 +360,32 @@ static int rd_MEMCPY_read(struct rd_request *req)
 	u32 rd_offset = req->rd_offset;
 
 	table = rd_get_sg_table(dev, req->rd_page);
-	if (!(table))
+	if (!table)
 		return -EINVAL;
 
 	table_sg_end = (table->page_end_offset - req->rd_page);
 	sg_d = task->task_sg;
 	sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
-#ifdef DEBUG_RAMDISK_MCP
-	printk(KERN_INFO "RD[%u]: Read LBA: %llu, Size: %u Page: %u, Offset:"
+
+	pr_debug("RD[%u]: Read LBA: %llu, Size: %u Page: %u, Offset:"
 		" %u\n", dev->rd_dev_id, task->task_lba, req->rd_size,
 		req->rd_page, req->rd_offset);
-#endif
+
 	src_offset = rd_offset;
 
 	while (req->rd_size) {
 		if ((sg_d[i].length - dst_offset) <
 		    (sg_s[j].length - src_offset)) {
 			length = (sg_d[i].length - dst_offset);
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "Step 1 - sg_d[%d]: %p length: %d"
+
+			pr_debug("Step 1 - sg_d[%d]: %p length: %d"
 				" offset: %u sg_s[%d].length: %u\n", i,
 				&sg_d[i], sg_d[i].length, sg_d[i].offset, j,
 				sg_s[j].length);
-			printk(KERN_INFO "Step 1 - length: %u dst_offset: %u"
+			pr_debug("Step 1 - length: %u dst_offset: %u"
 				" src_offset: %u\n", length, dst_offset,
 				src_offset);
-#endif
+
 			if (length > req->rd_size)
 				length = req->rd_size;
 
@@ -421,15 +402,15 @@ static int rd_MEMCPY_read(struct rd_request *req)
 			page_end = 0;
 		} else {
 			length = (sg_s[j].length - src_offset);
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "Step 2 - sg_d[%d]: %p length: %d"
+
+			pr_debug("Step 2 - sg_d[%d]: %p length: %d"
 				" offset: %u sg_s[%d].length: %u\n", i,
 				&sg_d[i], sg_d[i].length, sg_d[i].offset,
 				j, sg_s[j].length);
-			printk(KERN_INFO "Step 2 - length: %u dst_offset: %u"
+			pr_debug("Step 2 - length: %u dst_offset: %u"
 				" src_offset: %u\n", length, dst_offset,
 				src_offset);
-#endif
+
 			if (length > req->rd_size)
 				length = req->rd_size;
 
@@ -453,31 +434,28 @@ static int rd_MEMCPY_read(struct rd_request *req)
 
 		memcpy(dst, src, length);
 
-#ifdef DEBUG_RAMDISK_MCP
-		printk(KERN_INFO "page: %u, remaining size: %u, length: %u,"
+		pr_debug("page: %u, remaining size: %u, length: %u,"
 			" i: %u, j: %u\n", req->rd_page,
 			(req->rd_size - length), length, i, j);
-#endif
+
 		req->rd_size -= length;
-		if (!(req->rd_size))
+		if (!req->rd_size)
 			return 0;
 
 		if (!page_end)
 			continue;
 
 		if (++req->rd_page <= table->page_end_offset) {
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "page: %u in same page table\n",
+			pr_debug("page: %u in same page table\n",
 				req->rd_page);
-#endif
 			continue;
 		}
-#ifdef DEBUG_RAMDISK_MCP
-		printk(KERN_INFO "getting new page table for page: %u\n",
+
+		pr_debug("getting new page table for page: %u\n",
 				req->rd_page);
-#endif
+
 		table = rd_get_sg_table(dev, req->rd_page);
-		if (!(table))
+		if (!table)
 			return -EINVAL;
 
 		sg_s = &table->sg_table[j = 0];
@@ -493,7 +471,7 @@ static int rd_MEMCPY_read(struct rd_request *req)
 static int rd_MEMCPY_write(struct rd_request *req)
 {
 	struct se_task *task = &req->rd_task;
-	struct rd_dev *dev = req->rd_dev;
+	struct rd_dev *dev = req->rd_task.se_dev->dev_ptr;
 	struct rd_dev_sg_table *table;
 	struct scatterlist *sg_d, *sg_s;
 	void *dst, *src;
@@ -502,32 +480,32 @@ static int rd_MEMCPY_write(struct rd_request *req)
 	u32 rd_offset = req->rd_offset;
 
 	table = rd_get_sg_table(dev, req->rd_page);
-	if (!(table))
+	if (!table)
 		return -EINVAL;
 
 	table_sg_end = (table->page_end_offset - req->rd_page);
 	sg_d = &table->sg_table[req->rd_page - table->page_start_offset];
 	sg_s = task->task_sg;
-#ifdef DEBUG_RAMDISK_MCP
-	printk(KERN_INFO "RD[%d] Write LBA: %llu, Size: %u, Page: %u,"
+
+	pr_debug("RD[%d] Write LBA: %llu, Size: %u, Page: %u,"
 		" Offset: %u\n", dev->rd_dev_id, task->task_lba, req->rd_size,
 		req->rd_page, req->rd_offset);
-#endif
+
 	dst_offset = rd_offset;
 
 	while (req->rd_size) {
 		if ((sg_s[i].length - src_offset) <
 		    (sg_d[j].length - dst_offset)) {
 			length = (sg_s[i].length - src_offset);
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "Step 1 - sg_s[%d]: %p length: %d"
+
+			pr_debug("Step 1 - sg_s[%d]: %p length: %d"
 				" offset: %d sg_d[%d].length: %u\n", i,
 				&sg_s[i], sg_s[i].length, sg_s[i].offset,
 				j, sg_d[j].length);
-			printk(KERN_INFO "Step 1 - length: %u src_offset: %u"
+			pr_debug("Step 1 - length: %u src_offset: %u"
 				" dst_offset: %u\n", length, src_offset,
 				dst_offset);
-#endif
+
 			if (length > req->rd_size)
 				length = req->rd_size;
 
@@ -544,15 +522,15 @@ static int rd_MEMCPY_write(struct rd_request *req)
 			page_end = 0;
 		} else {
 			length = (sg_d[j].length - dst_offset);
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "Step 2 - sg_s[%d]: %p length: %d"
+
+			pr_debug("Step 2 - sg_s[%d]: %p length: %d"
 				" offset: %d sg_d[%d].length: %u\n", i,
 				&sg_s[i], sg_s[i].length, sg_s[i].offset,
 				j, sg_d[j].length);
-			printk(KERN_INFO "Step 2 - length: %u src_offset: %u"
+			pr_debug("Step 2 - length: %u src_offset: %u"
 				" dst_offset: %u\n", length, src_offset,
 				dst_offset);
-#endif
+
 			if (length > req->rd_size)
 				length = req->rd_size;
 
@@ -576,31 +554,28 @@ static int rd_MEMCPY_write(struct rd_request *req)
 
 		memcpy(dst, src, length);
 
-#ifdef DEBUG_RAMDISK_MCP
-		printk(KERN_INFO "page: %u, remaining size: %u, length: %u,"
+		pr_debug("page: %u, remaining size: %u, length: %u,"
 			" i: %u, j: %u\n", req->rd_page,
 			(req->rd_size - length), length, i, j);
-#endif
+
 		req->rd_size -= length;
-		if (!(req->rd_size))
+		if (!req->rd_size)
 			return 0;
 
 		if (!page_end)
 			continue;
 
 		if (++req->rd_page <= table->page_end_offset) {
-#ifdef DEBUG_RAMDISK_MCP
-			printk(KERN_INFO "page: %u in same page table\n",
+			pr_debug("page: %u in same page table\n",
 				req->rd_page);
-#endif
 			continue;
 		}
-#ifdef DEBUG_RAMDISK_MCP
-		printk(KERN_INFO "getting new page table for page: %u\n",
+
+		pr_debug("getting new page table for page: %u\n",
 				req->rd_page);
-#endif
+
 		table = rd_get_sg_table(dev, req->rd_page);
-		if (!(table))
+		if (!table)
 			return -EINVAL;
 
 		sg_d = &table->sg_table[j = 0];
@@ -641,273 +616,6 @@ static int rd_MEMCPY_do_task(struct se_task *task)
 	return PYX_TRANSPORT_SENT_TO_TRANSPORT;
 }
 
-/*	rd_DIRECT_with_offset():
- *
- *
- */
-static int rd_DIRECT_with_offset(
-	struct se_task *task,
-	struct list_head *se_mem_list,
-	u32 *se_mem_cnt,
-	u32 *task_offset)
-{
-	struct rd_request *req = RD_REQ(task);
-	struct rd_dev *dev = req->rd_dev;
-	struct rd_dev_sg_table *table;
-	struct se_mem *se_mem;
-	struct scatterlist *sg_s;
-	u32 j = 0, set_offset = 1;
-	u32 get_next_table = 0, offset_length, table_sg_end;
-
-	table = rd_get_sg_table(dev, req->rd_page);
-	if (!(table))
-		return -EINVAL;
-
-	table_sg_end = (table->page_end_offset - req->rd_page);
-	sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
-#ifdef DEBUG_RAMDISK_DR
-	printk(KERN_INFO "%s DIRECT LBA: %llu, Size: %u Page: %u, Offset: %u\n",
-		(task->task_data_direction == DMA_TO_DEVICE) ?
-			"Write" : "Read",
-		task->task_lba, req->rd_size, req->rd_page, req->rd_offset);
-#endif
-	while (req->rd_size) {
-		se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
-		if (!(se_mem)) {
-			printk(KERN_ERR "Unable to allocate struct se_mem\n");
-			return -ENOMEM;
-		}
-		INIT_LIST_HEAD(&se_mem->se_list);
-
-		if (set_offset) {
-			offset_length = sg_s[j].length - req->rd_offset;
-			if (offset_length > req->rd_size)
-				offset_length = req->rd_size;
-
-			se_mem->se_page = sg_page(&sg_s[j++]);
-			se_mem->se_off = req->rd_offset;
-			se_mem->se_len = offset_length;
-
-			set_offset = 0;
-			get_next_table = (j > table_sg_end);
-			goto check_eot;
-		}
-
-		offset_length = (req->rd_size < req->rd_offset) ?
-			req->rd_size : req->rd_offset;
-
-		se_mem->se_page = sg_page(&sg_s[j]);
-		se_mem->se_len = offset_length;
-
-		set_offset = 1;
-
-check_eot:
-#ifdef DEBUG_RAMDISK_DR
-		printk(KERN_INFO "page: %u, size: %u, offset_length: %u, j: %u"
-			" se_mem: %p, se_page: %p se_off: %u se_len: %u\n",
-			req->rd_page, req->rd_size, offset_length, j, se_mem,
-			se_mem->se_page, se_mem->se_off, se_mem->se_len);
-#endif
-		list_add_tail(&se_mem->se_list, se_mem_list);
-		(*se_mem_cnt)++;
-
-		req->rd_size -= offset_length;
-		if (!(req->rd_size))
-			goto out;
-
-		if (!set_offset && !get_next_table)
-			continue;
-
-		if (++req->rd_page <= table->page_end_offset) {
-#ifdef DEBUG_RAMDISK_DR
-			printk(KERN_INFO "page: %u in same page table\n",
-					req->rd_page);
-#endif
-			continue;
-		}
-#ifdef DEBUG_RAMDISK_DR
-		printk(KERN_INFO "getting new page table for page: %u\n",
-				req->rd_page);
-#endif
-		table = rd_get_sg_table(dev, req->rd_page);
-		if (!(table))
-			return -EINVAL;
-
-		sg_s = &table->sg_table[j = 0];
-	}
-
-out:
-	task->task_se_cmd->t_tasks_se_num += *se_mem_cnt;
-#ifdef DEBUG_RAMDISK_DR
-	printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
-			*se_mem_cnt);
-#endif
-	return 0;
-}
-
-/*	rd_DIRECT_without_offset():
- *
- *
- */
-static int rd_DIRECT_without_offset(
-	struct se_task *task,
-	struct list_head *se_mem_list,
-	u32 *se_mem_cnt,
-	u32 *task_offset)
-{
-	struct rd_request *req = RD_REQ(task);
-	struct rd_dev *dev = req->rd_dev;
-	struct rd_dev_sg_table *table;
-	struct se_mem *se_mem;
-	struct scatterlist *sg_s;
-	u32 length, j = 0;
-
-	table = rd_get_sg_table(dev, req->rd_page);
-	if (!(table))
-		return -EINVAL;
-
-	sg_s = &table->sg_table[req->rd_page - table->page_start_offset];
-#ifdef DEBUG_RAMDISK_DR
-	printk(KERN_INFO "%s DIRECT LBA: %llu, Size: %u, Page: %u\n",
-		(task->task_data_direction == DMA_TO_DEVICE) ?
-			"Write" : "Read",
-		task->task_lba, req->rd_size, req->rd_page);
-#endif
-	while (req->rd_size) {
-		se_mem = kmem_cache_zalloc(se_mem_cache, GFP_KERNEL);
-		if (!(se_mem)) {
-			printk(KERN_ERR "Unable to allocate struct se_mem\n");
-			return -ENOMEM;
-		}
-		INIT_LIST_HEAD(&se_mem->se_list);
-
-		length = (req->rd_size < sg_s[j].length) ?
-			req->rd_size : sg_s[j].length;
-
-		se_mem->se_page = sg_page(&sg_s[j++]);
-		se_mem->se_len = length;
-
-#ifdef DEBUG_RAMDISK_DR
-		printk(KERN_INFO "page: %u, size: %u, j: %u se_mem: %p,"
-			" se_page: %p se_off: %u se_len: %u\n", req->rd_page,
-			req->rd_size, j, se_mem, se_mem->se_page,
-			se_mem->se_off, se_mem->se_len);
-#endif
-		list_add_tail(&se_mem->se_list, se_mem_list);
-		(*se_mem_cnt)++;
-
-		req->rd_size -= length;
-		if (!(req->rd_size))
-			goto out;
-
-		if (++req->rd_page <= table->page_end_offset) {
-#ifdef DEBUG_RAMDISK_DR
-			printk("page: %u in same page table\n",
-				req->rd_page);
-#endif
-			continue;
-		}
-#ifdef DEBUG_RAMDISK_DR
-		printk(KERN_INFO "getting new page table for page: %u\n",
-				req->rd_page);
-#endif
-		table = rd_get_sg_table(dev, req->rd_page);
-		if (!(table))
-			return -EINVAL;
-
-		sg_s = &table->sg_table[j = 0];
-	}
-
-out:
-	task->task_se_cmd->t_tasks_se_num += *se_mem_cnt;
-#ifdef DEBUG_RAMDISK_DR
-	printk(KERN_INFO "RD_DR - Allocated %u struct se_mem segments for task\n",
-			*se_mem_cnt);
-#endif
-	return 0;
-}
-
-/*	rd_DIRECT_do_se_mem_map():
- *
- *
- */
-static int rd_DIRECT_do_se_mem_map(
-	struct se_task *task,
-	struct list_head *se_mem_list,
-	void *in_mem,
-	struct se_mem *in_se_mem,
-	struct se_mem **out_se_mem,
-	u32 *se_mem_cnt,
-	u32 *task_offset_in)
-{
-	struct se_cmd *cmd = task->task_se_cmd;
-	struct rd_request *req = RD_REQ(task);
-	u32 task_offset = *task_offset_in;
-	unsigned long long lba;
-	int ret;
-	int block_size = task->se_dev->se_sub_dev->se_dev_attrib.block_size;
-
-	lba = task->task_lba;
-	req->rd_page = ((task->task_lba * block_size) /	PAGE_SIZE);
-	req->rd_offset = (do_div(lba, (PAGE_SIZE / block_size))) * block_size;
-	req->rd_size = task->task_size;
-
-	if (req->rd_offset)
-		ret = rd_DIRECT_with_offset(task, se_mem_list, se_mem_cnt,
-				task_offset_in);
-	else
-		ret = rd_DIRECT_without_offset(task, se_mem_list, se_mem_cnt,
-				task_offset_in);
-
-	if (ret < 0)
-		return ret;
-
-	if (cmd->se_tfo->task_sg_chaining == 0)
-		return 0;
-	/*
-	 * Currently prevent writers from multiple HW fabrics doing
-	 * pci_map_sg() to RD_DR's internal scatterlist memory.
-	 */
-	if (cmd->data_direction == DMA_TO_DEVICE) {
-		printk(KERN_ERR "DMA_TO_DEVICE not supported for"
-				" RAMDISK_DR with task_sg_chaining=1\n");
-		return -ENOSYS;
-	}
-	/*
-	 * Special case for if task_sg_chaining is enabled, then
-	 * we setup struct se_task->task_sg[], as it will be used by
-	 * transport_do_task_sg_chain() for creating chainged SGLs
-	 * across multiple struct se_task->task_sg[].
-	 */
-	ret = transport_init_task_sg(task,
-			list_first_entry(&cmd->t_mem_list,
-				   struct se_mem, se_list),
-			task_offset);
-	if (ret <= 0)
-		return ret;
-
-	return transport_map_mem_to_sg(task, se_mem_list, task->task_sg,
-			list_first_entry(&cmd->t_mem_list,
-				   struct se_mem, se_list),
-			out_se_mem, se_mem_cnt, task_offset_in);
-}
-
-/*	rd_DIRECT_do_task(): (Part of se_subsystem_api_t template)
- *
- *
- */
-static int rd_DIRECT_do_task(struct se_task *task)
-{
-	/*
-	 * At this point the locally allocated RD tables have been mapped
-	 * to struct se_mem elements in rd_DIRECT_do_se_mem_map().
-	 */
-	task->task_scsi_status = GOOD;
-	transport_complete_task(task, 1);
-
-	return PYX_TRANSPORT_SENT_TO_TRANSPORT;
-}
-
 /*	rd_free_task(): (Part of se_subsystem_api_t template)
  *
  *
@@ -952,7 +660,7 @@ static ssize_t rd_set_configfs_dev_params(
 		case Opt_rd_pages:
 			match_int(args, &arg);
 			rd_dev->rd_page_count = arg;
-			printk(KERN_INFO "RAMDISK: Referencing Page"
+			pr_debug("RAMDISK: Referencing Page"
 				" Count: %u\n", rd_dev->rd_page_count);
 			rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT;
 			break;
@@ -970,7 +678,7 @@ static ssize_t rd_check_configfs_dev_params(struct se_hba *hba, struct se_subsys
 	struct rd_dev *rd_dev = se_dev->se_dev_su_ptr;
 
 	if (!(rd_dev->rd_flags & RDF_HAS_PAGE_COUNT)) {
-		printk(KERN_INFO "Missing rd_pages= parameter\n");
+		pr_debug("Missing rd_pages= parameter\n");
 		return -EINVAL;
 	}
 
@@ -1022,27 +730,6 @@ static sector_t rd_get_blocks(struct se_device *dev)
 	return blocks_long;
 }
 
-static struct se_subsystem_api rd_dr_template = {
-	.name			= "rd_dr",
-	.transport_type		= TRANSPORT_PLUGIN_VHBA_VDEV,
-	.attach_hba		= rd_attach_hba,
-	.detach_hba		= rd_detach_hba,
-	.allocate_virtdevice	= rd_DIRECT_allocate_virtdevice,
-	.create_virtdevice	= rd_DIRECT_create_virtdevice,
-	.free_device		= rd_free_device,
-	.alloc_task		= rd_alloc_task,
-	.do_task		= rd_DIRECT_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,
-	.show_configfs_dev_params = rd_show_configfs_dev_params,
-	.get_cdb		= rd_get_cdb,
-	.get_device_rev		= rd_get_device_rev,
-	.get_device_type	= rd_get_device_type,
-	.get_blocks		= rd_get_blocks,
-	.do_se_mem_map		= rd_DIRECT_do_se_mem_map,
-};
-
 static struct se_subsystem_api rd_mcp_template = {
 	.name			= "rd_mcp",
 	.transport_type		= TRANSPORT_PLUGIN_VHBA_VDEV,
@@ -1067,13 +754,8 @@ int __init rd_module_init(void)
 {
 	int ret;
 
-	ret = transport_subsystem_register(&rd_dr_template);
-	if (ret < 0)
-		return ret;
-
 	ret = transport_subsystem_register(&rd_mcp_template);
 	if (ret < 0) {
-		transport_subsystem_release(&rd_dr_template);
 		return ret;
 	}
 
@@ -1082,6 +764,5 @@ int __init rd_module_init(void)
 
 void rd_module_exit(void)
 {
-	transport_subsystem_release(&rd_dr_template);
 	transport_subsystem_release(&rd_mcp_template);
 }