Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 165 insertions, 0 deletions

diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
new file mode 100644
index 000000000000..9d9871c28abd
--- /dev/null
+++ b/include/scsi/scsi_cmnd.h
@@ -0,0 +1,165 @@
+#ifndef _SCSI_SCSI_CMND_H
+#define _SCSI_SCSI_CMND_H
+
+#include <linux/dma-mapping.h>
+#include <linux/list.h>
+#include <linux/types.h>
+
+struct request;
+struct scatterlist;
+struct scsi_device;
+struct scsi_request;
+
+
+/* embedded in scsi_cmnd */
+struct scsi_pointer {
+        char *ptr;              /* data pointer */
+        int this_residual;      /* left in this buffer */
+        struct scatterlist *buffer;     /* which buffer */
+        int buffers_residual;   /* how many buffers left */
+
+        dma_addr_t dma_handle;
+
+        volatile int Status;
+        volatile int Message;
+        volatile int have_data_in;
+        volatile int sent_command;
+        volatile int phase;
+};
+
+struct scsi_cmnd {
+        int     sc_magic;
+
+        struct scsi_device *device;
+        unsigned short state;
+        unsigned short owner;
+        struct scsi_request *sc_request;
+
+        struct list_head list;  /* scsi_cmnd participates in queue lists */
+
+        struct list_head eh_entry; /* entry for the host eh_cmd_q */
+        int eh_state;           /* Used for state tracking in error handlr */
+        int eh_eflags;          /* Used by error handlr */
+        void (*done) (struct scsi_cmnd *);      /* Mid-level done function */
+
+        /*
+         * A SCSI Command is assigned a nonzero serial_number when internal_cmnd
+         * passes it to the driver's queue command function.  The serial_number
+         * is cleared when scsi_done is entered indicating that the command has
+         * been completed.  If a timeout occurs, the serial number at the moment
+         * of timeout is copied into serial_number_at_timeout.  By subsequently
+         * comparing the serial_number and serial_number_at_timeout fields
+         * during abort or reset processing, we can detect whether the command
+         * has already completed.  This also detects cases where the command has
+         * completed and the SCSI Command structure has already being reused
+         * for another command, so that we can avoid incorrectly aborting or
+         * resetting the new command.
+         * The serial number is only unique per host.
+         */
+        unsigned long serial_number;
+        unsigned long serial_number_at_timeout;
+
+        int retries;
+        int allowed;
+        int timeout_per_command;
+        int timeout_total;
+        int timeout;
+
+        /*
+         * We handle the timeout differently if it happens when a reset, 
+         * abort, etc are in process. 
+         */
+        unsigned volatile char internal_timeout;
+
+        unsigned char cmd_len;
+        unsigned char old_cmd_len;
+        enum dma_data_direction sc_data_direction;
+        enum dma_data_direction sc_old_data_direction;
+
+        /* These elements define the operation we are about to perform */
+#define MAX_COMMAND_SIZE        16
+        unsigned char cmnd[MAX_COMMAND_SIZE];
+        unsigned request_bufflen;       /* Actual request size */
+
+        struct timer_list eh_timeout;   /* Used to time out the command. */
+        void *request_buffer;           /* Actual requested buffer */
+
+        /* These elements define the operation we ultimately want to perform */
+        unsigned char data_cmnd[MAX_COMMAND_SIZE];
+        unsigned short old_use_sg;      /* We save  use_sg here when requesting
+                                         * sense info */
+        unsigned short use_sg;  /* Number of pieces of scatter-gather */
+        unsigned short sglist_len;      /* size of malloc'd scatter-gather list */
+        unsigned short abort_reason;    /* If the mid-level code requests an
+                                         * abort, this is the reason. */
+        unsigned bufflen;       /* Size of data buffer */
+        void *buffer;           /* Data buffer */
+
+        unsigned underflow;     /* Return error if less than
+                                   this amount is transferred */
+        unsigned old_underflow; /* save underflow here when reusing the
+                                 * command for error handling */
+
+        unsigned transfersize;  /* How much we are guaranteed to
+                                   transfer with each SCSI transfer
+                                   (ie, between disconnect / 
+                                   reconnects.   Probably == sector
+                                   size */
+
+        int resid;              /* Number of bytes requested to be
+                                   transferred less actual number
+                                   transferred (0 if not supported) */
+
+        struct request *request;        /* The command we are
+                                           working on */
+
+#define SCSI_SENSE_BUFFERSIZE   96
+        unsigned char sense_buffer[SCSI_SENSE_BUFFERSIZE];              /* obtained by REQUEST SENSE
+                                                 * when CHECK CONDITION is
+                                                 * received on original command 
+                                                 * (auto-sense) */
+
+        /* Low-level done function - can be used by low-level driver to point
+         *        to completion function.  Not used by mid/upper level code. */
+        void (*scsi_done) (struct scsi_cmnd *);
+
+        /*
+         * The following fields can be written to by the host specific code. 
+         * Everything else should be left alone. 
+         */
+        struct scsi_pointer SCp;        /* Scratchpad used by some host adapters */
+
+        unsigned char *host_scribble;   /* The host adapter is allowed to
+                                           * call scsi_malloc and get some memory
+                                           * and hang it here.     The host adapter
+                                           * is also expected to call scsi_free
+                                           * to release this memory.  (The memory
+                                           * obtained by scsi_malloc is guaranteed
+                                           * to be at an address < 16Mb). */
+
+        int result;             /* Status code from lower level driver */
+
+        unsigned char tag;      /* SCSI-II queued command tag */
+        unsigned long pid;      /* Process ID, starts at 0. Unique per host. */
+};
+
+/*
+ * These are the values that scsi_cmd->state can take.
+ */
+#define SCSI_STATE_TIMEOUT         0x1000
+#define SCSI_STATE_FINISHED        0x1001
+#define SCSI_STATE_FAILED          0x1002
+#define SCSI_STATE_QUEUED          0x1003
+#define SCSI_STATE_UNUSED          0x1006
+#define SCSI_STATE_DISCONNECTING   0x1008
+#define SCSI_STATE_INITIALIZING    0x1009
+#define SCSI_STATE_BHQUEUE         0x100a
+#define SCSI_STATE_MLQUEUE         0x100b
+
+
+extern struct scsi_cmnd *scsi_get_command(struct scsi_device *, int);
+extern void scsi_put_command(struct scsi_cmnd *);
+extern void scsi_io_completion(struct scsi_cmnd *, unsigned int, unsigned int);
+extern void scsi_finish_command(struct scsi_cmnd *cmd);
+
+#endif /* _SCSI_SCSI_CMND_H */