SCSI cleanup, by Laurent Vivier.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3797 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 38 insertions, 24 deletions

diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 700b914..d281b8c 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -37,7 +37,7 @@ do { fprintf(stderr, "scsi-disk: " fmt , ##args); } while (0)
 #define SCSI_DMA_BUF_SIZE    65536
 
 typedef struct SCSIRequest {
-    SCSIDevice *dev;
+    SCSIDeviceState *dev;
     uint32_t tag;
     /* ??? We should probably keep track of whether the data trasfer is
        a read or a write.  Currently we rely on the host getting it right.  */
@@ -51,7 +51,7 @@ typedef struct SCSIRequest {
     struct SCSIRequest *next;
 } SCSIRequest;
 
-struct SCSIDevice
+struct SCSIDeviceState
 {
     BlockDriverState *bdrv;
     SCSIRequest *requests;
@@ -69,7 +69,7 @@ struct SCSIDevice
 /* Global pool of SCSIRequest structures.  */
 static SCSIRequest *free_requests = NULL;
 
-static SCSIRequest *scsi_new_request(SCSIDevice *s, uint32_t tag)
+static SCSIRequest *scsi_new_request(SCSIDeviceState *s, uint32_t tag)
 {
     SCSIRequest *r;
 
@@ -93,7 +93,7 @@ static SCSIRequest *scsi_new_request(SCSIDevice *s, uint32_t tag)
 static void scsi_remove_request(SCSIRequest *r)
 {
     SCSIRequest *last;
-    SCSIDevice *s = r->dev;
+    SCSIDeviceState *s = r->dev;
 
     if (s->requests == r) {
         s->requests = r->next;
@@ -111,7 +111,7 @@ static void scsi_remove_request(SCSIRequest *r)
     free_requests = r;
 }
 
-static SCSIRequest *scsi_find_request(SCSIDevice *s, uint32_t tag)
+static SCSIRequest *scsi_find_request(SCSIDeviceState *s, uint32_t tag)
 {
     SCSIRequest *r;
 
@@ -125,7 +125,7 @@ static SCSIRequest *scsi_find_request(SCSIDevice *s, uint32_t tag)
 /* Helper function for command completion.  */
 static void scsi_command_complete(SCSIRequest *r, int sense)
 {
-    SCSIDevice *s = r->dev;
+    SCSIDeviceState *s = r->dev;
     uint32_t tag;
     DPRINTF("Command complete tag=0x%x sense=%d\n", r->tag, sense);
     s->sense = sense;
@@ -135,8 +135,9 @@ static void scsi_command_complete(SCSIRequest *r, int sense)
 }
 
 /* Cancel a pending data transfer.  */
-void scsi_cancel_io(SCSIDevice *s, uint32_t tag)
+static void scsi_cancel_io(SCSIDevice *d, uint32_t tag)
 {
+    SCSIDeviceState *s = d->state;
     SCSIRequest *r;
     DPRINTF("Cancel tag=0x%x\n", tag);
     r = scsi_find_request(s, tag);
@@ -151,7 +152,7 @@ void scsi_cancel_io(SCSIDevice *s, uint32_t tag)
 static void scsi_read_complete(void * opaque, int ret)
 {
     SCSIRequest *r = (SCSIRequest *)opaque;
-    SCSIDevice *s = r->dev;
+    SCSIDeviceState *s = r->dev;
 
     if (ret) {
         DPRINTF("IO error\n");
@@ -164,8 +165,9 @@ static void scsi_read_complete(void * opaque, int ret)
 }
 
 /* Read more data from scsi device into buffer.  */
-void scsi_read_data(SCSIDevice *s, uint32_t tag)
+static void scsi_read_data(SCSIDevice *d, uint32_t tag)
 {
+    SCSIDeviceState *s = d->state;
     SCSIRequest *r;
     uint32_t n;
 
@@ -204,7 +206,7 @@ void scsi_read_data(SCSIDevice *s, uint32_t tag)
 static void scsi_write_complete(void * opaque, int ret)
 {
     SCSIRequest *r = (SCSIRequest *)opaque;
-    SCSIDevice *s = r->dev;
+    SCSIDeviceState *s = r->dev;
     uint32_t len;
 
     if (ret) {
@@ -228,8 +230,9 @@ static void scsi_write_complete(void * opaque, int ret)
 
 /* Write data to a scsi device.  Returns nonzero on failure.
    The transfer may complete asynchronously.  */
-int scsi_write_data(SCSIDevice *s, uint32_t tag)
+static int scsi_write_data(SCSIDevice *d, uint32_t tag)
 {
+    SCSIDeviceState *s = d->state;
     SCSIRequest *r;
     uint32_t n;
 
@@ -259,8 +262,9 @@ int scsi_write_data(SCSIDevice *s, uint32_t tag)
 }
 
 /* Return a pointer to the data buffer.  */
-uint8_t *scsi_get_buf(SCSIDevice *s, uint32_t tag)
+static uint8_t *scsi_get_buf(SCSIDevice *d, uint32_t tag)
 {
+    SCSIDeviceState *s = d->state;
     SCSIRequest *r;
 
     r = scsi_find_request(s, tag);
@@ -276,8 +280,10 @@ uint8_t *scsi_get_buf(SCSIDevice *s, uint32_t tag)
    (eg. disk reads), negative for transfers to the device (eg. disk writes),
    and zero if the command does not transfer any data.  */
 
-int32_t scsi_send_command(SCSIDevice *s, uint32_t tag, uint8_t *buf, int lun)
+static int32_t scsi_send_command(SCSIDevice *d, uint32_t tag,
+                                 uint8_t *buf, int lun)
 {
+    SCSIDeviceState *s = d->state;
     int64_t nb_sectors;
     uint32_t lba;
     uint32_t len;
@@ -291,7 +297,7 @@ int32_t scsi_send_command(SCSIDevice *s, uint32_t tag, uint8_t *buf, int lun)
     r = scsi_find_request(s, tag);
     if (r) {
         BADF("Tag 0x%x already in use\n", tag);
-        scsi_cancel_io(s, tag);
+        scsi_cancel_io(d, tag);
     }
     /* ??? Tags are not unique for different luns.  We only implement a
        single lun, so this should not matter.  */
@@ -576,19 +582,19 @@ int32_t scsi_send_command(SCSIDevice *s, uint32_t tag, uint8_t *buf, int lun)
     }
 }
 
-void scsi_disk_destroy(SCSIDevice *s)
+static void scsi_destroy(SCSIDevice *d)
 {
-    qemu_free(s);
+    qemu_free(d->state);
+    qemu_free(d);
 }
 
-SCSIDevice *scsi_disk_init(BlockDriverState *bdrv,
-                           int tcq,
-                           scsi_completionfn completion,
-                           void *opaque)
+SCSIDevice *scsi_disk_init(BlockDriverState *bdrv, int tcq,
+                           scsi_completionfn completion, void *opaque)
 {
-    SCSIDevice *s;
+    SCSIDevice *d;
+    SCSIDeviceState *s;
 
-    s = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
+    s = (SCSIDeviceState *)qemu_mallocz(sizeof(SCSIDeviceState));
     s->bdrv = bdrv;
     s->tcq = tcq;
     s->completion = completion;
@@ -599,6 +605,14 @@ SCSIDevice *scsi_disk_init(BlockDriverState *bdrv,
         s->cluster_size = 1;
     }
 
-    return s;
-}
+    d = (SCSIDevice *)qemu_mallocz(sizeof(SCSIDevice));
+    d->state = s;
+    d->destroy = scsi_destroy;
+    d->send_command = scsi_send_command;
+    d->read_data = scsi_read_data;
+    d->write_data = scsi_write_data;
+    d->cancel_io = scsi_cancel_io;
+    d->get_buf = scsi_get_buf;
 
+    return d;
+}