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authorEric Blake <eblake@redhat.com>2016-05-06 10:26:35 -0600
committerKevin Wolf <kwolf@redhat.com>2016-05-12 15:22:09 +0200
commita7a5b7c0fc4caeeda59b4bc91d467c4c98db79cf (patch)
treed5755d1d1c23ae7672de52bd756a62aefa83df5c /hw/block/fdc.c
parentd00000f90193cdbed32a16bcc9b5b4e9ff9d7ab2 (diff)
fdc: Switch to byte-based block access
Sector-based blk_write() should die; switch to byte-based blk_pwrite() instead. Likewise for blk_read(). Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'hw/block/fdc.c')
-rw-r--r--hw/block/fdc.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index 372227569e..f73af7db46 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -223,6 +223,13 @@ static int fd_sector(FDrive *drv)
NUM_SIDES(drv));
}
+/* Returns current position, in bytes, for given drive */
+static int fd_offset(FDrive *drv)
+{
+ g_assert(fd_sector(drv) < INT_MAX >> BDRV_SECTOR_BITS);
+ return fd_sector(drv) << BDRV_SECTOR_BITS;
+}
+
/* Seek to a new position:
* returns 0 if already on right track
* returns 1 if track changed
@@ -1629,8 +1636,8 @@ static int fdctrl_transfer_handler (void *opaque, int nchan,
if (fdctrl->data_dir != FD_DIR_WRITE ||
len < FD_SECTOR_LEN || rel_pos != 0) {
/* READ & SCAN commands and realign to a sector for WRITE */
- if (blk_read(cur_drv->blk, fd_sector(cur_drv),
- fdctrl->fifo, 1) < 0) {
+ if (blk_pread(cur_drv->blk, fd_offset(cur_drv),
+ fdctrl->fifo, BDRV_SECTOR_SIZE) < 0) {
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
fd_sector(cur_drv));
/* Sure, image size is too small... */
@@ -1657,8 +1664,8 @@ static int fdctrl_transfer_handler (void *opaque, int nchan,
k->read_memory(fdctrl->dma, nchan, fdctrl->fifo + rel_pos,
fdctrl->data_pos, len);
- if (blk_write(cur_drv->blk, fd_sector(cur_drv),
- fdctrl->fifo, 1) < 0) {
+ if (blk_pwrite(cur_drv->blk, fd_offset(cur_drv),
+ fdctrl->fifo, BDRV_SECTOR_SIZE, 0) < 0) {
FLOPPY_DPRINTF("error writing sector %d\n",
fd_sector(cur_drv));
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
@@ -1741,7 +1748,8 @@ static uint32_t fdctrl_read_data(FDCtrl *fdctrl)
fd_sector(cur_drv));
return 0;
}
- if (blk_read(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1)
+ if (blk_pread(cur_drv->blk, fd_offset(cur_drv), fdctrl->fifo,
+ BDRV_SECTOR_SIZE)
< 0) {
FLOPPY_DPRINTF("error getting sector %d\n",
fd_sector(cur_drv));
@@ -1820,7 +1828,8 @@ static void fdctrl_format_sector(FDCtrl *fdctrl)
}
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
if (cur_drv->blk == NULL ||
- blk_write(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) {
+ blk_pwrite(cur_drv->blk, fd_offset(cur_drv), fdctrl->fifo,
+ BDRV_SECTOR_SIZE, 0) < 0) {
FLOPPY_DPRINTF("error formatting sector %d\n", fd_sector(cur_drv));
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00);
} else {
@@ -2243,8 +2252,8 @@ static void fdctrl_write_data(FDCtrl *fdctrl, uint32_t value)
if (pos == FD_SECTOR_LEN - 1 ||
fdctrl->data_pos == fdctrl->data_len) {
cur_drv = get_cur_drv(fdctrl);
- if (blk_write(cur_drv->blk, fd_sector(cur_drv), fdctrl->fifo, 1)
- < 0) {
+ if (blk_pwrite(cur_drv->blk, fd_offset(cur_drv), fdctrl->fifo,
+ BDRV_SECTOR_SIZE, 0) < 0) {
FLOPPY_DPRINTF("error writing sector %d\n",
fd_sector(cur_drv));
break;