Merge /spare/repo/linux-2.6/

5 files changed, 96 insertions, 1 deletions

diff --git a/include/scsi/scsi.h b/include/scsi/scsi.h
index 659ecf48fb4..1fb23374151 100644
--- a/include/scsi/scsi.h
+++ b/include/scsi/scsi.h
@@ -41,6 +41,7 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 #define FORMAT_UNIT           0x04
 #define READ_BLOCK_LIMITS     0x05
 #define REASSIGN_BLOCKS       0x07
+#define INITIALIZE_ELEMENT_STATUS 0x07
 #define READ_6                0x08
 #define WRITE_6               0x0a
 #define SEEK_6                0x0b
@@ -65,6 +66,7 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 #define READ_10               0x28
 #define WRITE_10              0x2a
 #define SEEK_10               0x2b
+#define POSITION_TO_ELEMENT   0x2b
 #define WRITE_VERIFY          0x2e
 #define VERIFY                0x2f
 #define SEARCH_HIGH           0x30
@@ -97,6 +99,7 @@ extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
 #define PERSISTENT_RESERVE_OUT 0x5f
 #define REPORT_LUNS           0xa0
 #define MOVE_MEDIUM           0xa5
+#define EXCHANGE_MEDIUM       0xa6
 #define READ_12               0xa8
 #define WRITE_12              0xaa
 #define WRITE_VERIFY_12       0xae
@@ -210,6 +213,7 @@ static inline int scsi_status_is_good(int status)
 #define TYPE_COMM           0x09    /* Communications device */
 #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
 #define TYPE_RAID           0x0c
+#define TYPE_RBC	    0x0e
 #define TYPE_NO_LUN         0x7f
 
 /*
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index c018020d916..63c91dd85ca 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -154,7 +154,9 @@ struct scsi_target {
 	unsigned int		id; /* target id ... replace
 				     * scsi_device.id eventually */
 	unsigned long		create:1; /* signal that it needs to be added */
-	unsigned long		starget_data[0];
+	void 			*hostdata; /* available to low-level driver */
+	unsigned long		starget_data[0]; /* for the transport */
+	/* starget_data must be the last element!!!! */
 } __attribute__((aligned(sizeof(unsigned long))));
 
 #define to_scsi_target(d)	container_of(d, struct scsi_target, dev)
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 1cee1e10094..db9914adeac 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -10,6 +10,7 @@ struct block_device;
 struct module;
 struct scsi_cmnd;
 struct scsi_device;
+struct scsi_target;
 struct Scsi_Host;
 struct scsi_host_cmd_pool;
 struct scsi_transport_template;
@@ -228,6 +229,30 @@ struct scsi_host_template {
 	void (* slave_destroy)(struct scsi_device *);
 
 	/*
+	 * Before the mid layer attempts to scan for a new device attached
+	 * to a target where no target currently exists, it will call this
+	 * entry in your driver.  Should your driver need to allocate any
+	 * structs or perform any other init items in order to send commands
+	 * to a currently unused target, then this is where you can perform
+	 * those allocations.
+	 *
+	 * Return values: 0 on success, non-0 on failure
+	 *
+	 * Status: OPTIONAL
+	 */
+	int (* target_alloc)(struct scsi_target *);
+
+	/*
+	 * Immediately prior to deallocating the target structure, and
+	 * after all activity to attached scsi devices has ceased, the
+	 * midlayer calls this point so that the driver may deallocate
+	 * and terminate any references to the target.
+	 *
+	 * Status: OPTIONAL
+	 */
+	void (* target_destroy)(struct scsi_target *);
+
+	/*
 	 * fill in this function to allow the queue depth of this host
 	 * to be changeable (on a per device basis).  returns either
 	 * the current queue depth setting (may be different from what
diff --git a/include/scsi/scsi_transport.h b/include/scsi/scsi_transport.h
index 2dcee7a8475..a4f1837a33b 100644
--- a/include/scsi/scsi_transport.h
+++ b/include/scsi/scsi_transport.h
@@ -21,6 +21,7 @@
 #define SCSI_TRANSPORT_H
 
 #include <linux/transport_class.h>
+#include <scsi/scsi_host.h>
 
 struct scsi_transport_template {
 	/* the attribute containers */
@@ -32,8 +33,11 @@ struct scsi_transport_template {
 	 * space of this size will be left at the end of the
 	 * scsi_* structure */
 	int	device_size;
+	int	device_private_offset;
 	int	target_size;
+	int	target_private_offset;
 	int	host_size;
+	/* no private offset for the host; there's an alternative mechanism */
 
 	/*
 	 * True if the transport wants to use a host-based work-queue
@@ -45,4 +49,38 @@ struct scsi_transport_template {
 	dev_to_shost((tc)->dev)
 
 
+/* Private area maintenance. The driver requested allocations come
+ * directly after the transport class allocations (if any).  The idea
+ * is that you *must* call these only once.  The code assumes that the
+ * initial values are the ones the transport specific code requires */
+static inline void
+scsi_transport_reserve_target(struct scsi_transport_template * t, int space)
+{
+	BUG_ON(t->target_private_offset != 0);
+	t->target_private_offset = ALIGN(t->target_size, sizeof(void *));
+	t->target_size = t->target_private_offset + space;
+}
+static inline void
+scsi_transport_reserve_device(struct scsi_transport_template * t, int space)
+{
+	BUG_ON(t->device_private_offset != 0);
+	t->device_private_offset = ALIGN(t->device_size, sizeof(void *));
+	t->device_size = t->device_private_offset + space;
+}
+static inline void *
+scsi_transport_target_data(struct scsi_target *starget)
+{
+	struct Scsi_Host *shost = dev_to_shost(&starget->dev);
+	return (u8 *)starget->starget_data
+		+ shost->transportt->target_private_offset;
+
+}
+static inline void *
+scsi_transport_device_data(struct scsi_device *sdev)
+{
+	struct Scsi_Host *shost = sdev->host;
+	return (u8 *)sdev->sdev_data
+		+ shost->transportt->device_private_offset;
+}
+
 #endif /* SCSI_TRANSPORT_H */
diff --git a/include/scsi/sg_request.h b/include/scsi/sg_request.h
new file mode 100644
index 00000000000..57ff525bdd3
--- /dev/null
+++ b/include/scsi/sg_request.h
@@ -0,0 +1,26 @@
+typedef struct scsi_request Scsi_Request;
+
+static Scsi_Request *dummy_cmdp;	/* only used for sizeof */
+
+typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */
+	unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */
+	unsigned short sglist_len; /* size of malloc'd scatter-gather list ++ */
+	unsigned bufflen;	/* Size of (aggregate) data buffer */
+	unsigned b_malloc_len;	/* actual len malloc'ed in buffer */
+	void *buffer;		/* Data buffer or scatter list (k_use_sg>0) */
+	char dio_in_use;	/* 0->indirect IO (or mmap), 1->dio */
+	unsigned char cmd_opcode; /* first byte of command */
+} Sg_scatter_hold;
+
+typedef struct sg_request {	/* SG_MAX_QUEUE requests outstanding per file */
+	Scsi_Request *my_cmdp;	/* != 0  when request with lower levels */
+	struct sg_request *nextrp;	/* NULL -> tail request (slist) */
+	struct sg_fd *parentfp;	/* NULL -> not in use */
+	Sg_scatter_hold data;	/* hold buffer, perhaps scatter list */
+	sg_io_hdr_t header;	/* scsi command+info, see <scsi/sg.h> */
+	unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)];
+	char res_used;		/* 1 -> using reserve buffer, 0 -> not ... */
+	char orphan;		/* 1 -> drop on sight, 0 -> normal */
+	char sg_io_owned;	/* 1 -> packet belongs to SG_IO */
+	volatile char done;	/* 0->before bh, 1->before read, 2->read */
+} Sg_request;