ide: place initial state of the current request to IDEBus

This moves more common restarting logic to the core IDE code.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NJohn Snow <jsnow@redhat.com>
Message-id: 1424708286-16483-10-git-send-email-jsnow@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

hw/ide/core.c

@@ -647,6 +647,8 @@ void ide_set_inactive(IDEState *s, bool more)
 {
     s->bus->dma->aiocb = NULL;
     s->bus->retry_unit = -1;
+    s->bus->retry_sector_num = 0;
+    s->bus->retry_nsector = 0;
     if (s->bus->dma->ops->set_inactive) {
         s->bus->dma->ops->set_inactive(s->bus->dma, more);
     }
@@ -801,6 +803,8 @@ static void ide_sector_start_dma(IDEState *s, enum ide_dma_cmd dma_cmd)
 void ide_start_dma(IDEState *s, BlockCompletionFunc *cb)
 {
     s->bus->retry_unit = s->unit;
+    s->bus->retry_sector_num = ide_get_sector(s);
+    s->bus->retry_nsector = s->nsector;
     if (s->bus->dma->ops->start_dma) {
         s->bus->dma->ops->start_dma(s->bus->dma, s, cb);
     }
@@ -2334,6 +2338,8 @@ static const IDEDMAOps ide_dma_nop_ops = {
 static void ide_restart_dma(IDEState *s, enum ide_dma_cmd dma_cmd)
 {
     s->unit = s->bus->retry_unit;
+    ide_set_sector(s, s->bus->retry_sector_num);
+    s->nsector = s->bus->retry_nsector;
     s->bus->dma->ops->restart_dma(s->bus->dma);
     s->io_buffer_index = 0;
     s->io_buffer_size = 0;

hw/ide/internal.h

@@ -465,6 +465,8 @@ struct IDEBus {
 
     int error_status;
     uint8_t retry_unit;
+    int64_t retry_sector_num;
+    uint32_t retry_nsector;
 };
 
 #define TYPE_IDE_DEVICE "ide-device"

hw/ide/pci.c

@@ -46,8 +46,6 @@ static void bmdma_start_dma(IDEDMA *dma, IDEState *s,
     bm->cur_prd_last = 0;
     bm->cur_prd_addr = 0;
     bm->cur_prd_len = 0;
-    bm->sector_num = ide_get_sector(s);
-    bm->nsector = s->nsector;
 
     if (bm->status & BM_STATUS_DMAING) {
         bm->dma_cb(bmdma_active_if(bm), 0);
@@ -177,10 +175,7 @@ static void bmdma_set_inactive(IDEDMA *dma, bool more)
 static void bmdma_restart_dma(IDEDMA *dma)
 {
     BMDMAState *bm = DO_UPCAST(BMDMAState, dma, dma);
-    IDEState *s = bmdma_active_if(bm);
 
-    ide_set_sector(s, bm->sector_num);
-    s->nsector = bm->nsector;
     bm->cur_addr = bm->addr;
 }
 
@@ -207,8 +202,6 @@ static void bmdma_reset(IDEDMA *dma)
     bm->cur_prd_last = 0;
     bm->cur_prd_addr = 0;
     bm->cur_prd_len = 0;
-    bm->sector_num = 0;
-    bm->nsector = 0;
 }
 
 static void bmdma_irq(void *opaque, int n, int level)
@@ -326,6 +319,8 @@ static void ide_bmdma_pre_save(void *opaque)
     uint8_t abused_bits = BM_MIGRATION_COMPAT_STATUS_BITS;
 
     bm->migration_retry_unit = bm->bus->retry_unit;
+    bm->migration_retry_sector_num = bm->bus->retry_sector_num;
+    bm->migration_retry_nsector = bm->bus->retry_nsector;
     bm->migration_compat_status =
         (bm->status & ~abused_bits) | (bm->bus->error_status & abused_bits);
 }
@@ -343,6 +338,8 @@ static int ide_bmdma_post_load(void *opaque, int version_id)
         bm->bus->error_status |= bm->migration_compat_status & abused_bits;
     }
     if (bm->bus->error_status) {
+        bm->bus->retry_sector_num = bm->migration_retry_sector_num;
+        bm->bus->retry_nsector = bm->migration_retry_nsector;
         bm->bus->retry_unit = bm->migration_retry_unit;
     }
 
@@ -381,8 +378,8 @@ static const VMStateDescription vmstate_bmdma = {
         VMSTATE_UINT8(cmd, BMDMAState),
         VMSTATE_UINT8(migration_compat_status, BMDMAState),
         VMSTATE_UINT32(addr, BMDMAState),
-        VMSTATE_INT64(sector_num, BMDMAState),
-        VMSTATE_UINT32(nsector, BMDMAState),
+        VMSTATE_INT64(migration_retry_sector_num, BMDMAState),
+        VMSTATE_UINT32(migration_retry_nsector, BMDMAState),
         VMSTATE_UINT8(migration_retry_unit, BMDMAState),
         VMSTATE_END_OF_LIST()
     },

hw/ide/pci.h

@@ -22,10 +22,7 @@ typedef struct BMDMAState {
     uint32_t cur_prd_last;
     uint32_t cur_prd_addr;
     uint32_t cur_prd_len;
-    uint8_t unit;
     BlockCompletionFunc *dma_cb;
-    int64_t sector_num;
-    uint32_t nsector;
     MemoryRegion addr_ioport;
     MemoryRegion extra_io;
     qemu_irq irq;
@@ -34,6 +31,8 @@ typedef struct BMDMAState {
      * Bit 3-6:         bus->error_status */
     uint8_t migration_compat_status;
     uint8_t migration_retry_unit;
+    int64_t migration_retry_sector_num;
+    uint32_t migration_retry_nsector;
 
     struct PCIIDEState *pci_dev;
 } BMDMAState;