Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / target / target_core_rd.h

diff --git a/drivers/target/target_core_rd.h b/drivers/target/target_core_rd.h
new file mode 100644 (file)
index 0000000..13badfb
--- /dev/null
+++ b/drivers/target/target_core_rd.h
@@ -0,0 +1,73 @@
+#ifndef TARGET_CORE_RD_H
+#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 */
+#define RD_MAX_ALLOCATION_SIZE 65536
+/* Maximum queuedepth for the Ramdisk HBA */
+#define RD_HBA_QUEUE_DEPTH     256
+#define RD_DEVICE_QUEUE_DEPTH  32
+#define RD_MAX_DEVICE_QUEUE_DEPTH 128
+#define RD_BLOCKSIZE           512
+#define RD_MAX_SECTORS         1024
+
+extern struct kmem_cache *se_mem_cache;
+
+/* Used in target_core_init_configfs() for virtual LUN 0 access */
+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;
+
+       /* SCSI CDB from iSCSI Command PDU */
+       unsigned char   rd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
+       /* 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;
+       /* Ramdisk device */
+       struct rd_dev   *rd_dev;
+} ____cacheline_aligned;
+
+struct rd_dev_sg_table {
+       u32             page_start_offset;
+       u32             page_end_offset;
+       u32             rd_sg_count;
+       struct scatterlist *sg_table;
+} ____cacheline_aligned;
+
+#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;
+       /* Total page count for ramdisk device */
+       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 */
+       struct rd_host *rd_host;
+} ____cacheline_aligned;
+
+struct rd_host {
+       u32             rd_host_dev_id_count;
+       u32             rd_host_id;             /* Unique Ramdisk Host ID */
+} ____cacheline_aligned;
+
+#endif /* TARGET_CORE_RD_H */