haraldwolff/qemu-patch-raspberry4
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Convert IDE to use new dma helpers (Avi Kivity)

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Use the new dma block helpers to perform dma disk I/O.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6525 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2009-02-05 21:24:02 +00:00
parent 59a703ebaa
commit 1fb8648d4a
1 changed files with 10 additions and 66 deletions
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76
hw/ide.c
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@ -33,6 +33,7 @@
#include "ppc_mac.h"
#include "mac_dbdma.h"
#include "sh.h"
#include "dma.h"
/* debug IDE devices */
//#define DEBUG_IDE
@ -423,7 +424,7 @@ typedef struct IDEState {
int atapi_dma; /* true if dma is requested for the packet cmd */
/* ATA DMA state */
int io_buffer_size;
QEMUIOVector iovec;
QEMUSGList sg;
/* PIO transfer handling */
int req_nb_sectors; /* number of sectors per interrupt */
EndTransferFunc *end_transfer_func;
@ -876,10 +877,8 @@ static int dma_buf_prepare(BMDMAState *bm, int is_write)
uint32_t size;
} prd;
int l, len;
void *mem;
target_phys_addr_t l1;
qemu_iovec_init(&s->iovec, s->nsector / (TARGET_PAGE_SIZE/512) + 1);
qemu_sglist_init(&s->sg, s->nsector / (TARGET_PAGE_SIZE/512) + 1);
s->io_buffer_size = 0;
for(;;) {
if (bm->cur_prd_len == 0) {
@ -900,15 +899,10 @@ static int dma_buf_prepare(BMDMAState *bm, int is_write)
}
l = bm->cur_prd_len;
if (l > 0) {
l1 = l;
mem = cpu_physical_memory_map(bm->cur_prd_addr, &l1, is_write);
if (!mem) {
break;
}
qemu_iovec_add(&s->iovec, mem, l1);
bm->cur_prd_addr += l1;
bm->cur_prd_len -= l1;
s->io_buffer_size += l1;
qemu_sglist_add(&s->sg, bm->cur_prd_addr, l);
bm->cur_prd_addr += l;
bm->cur_prd_len -= l;
s->io_buffer_size += l;
}
}
return 1;
@ -916,14 +910,7 @@ static int dma_buf_prepare(BMDMAState *bm, int is_write)
static void dma_buf_commit(IDEState *s, int is_write)
{
int i;
for (i = 0; i < s->iovec.niov; ++i) {
cpu_physical_memory_unmap(s->iovec.iov[i].iov_base,
s->iovec.iov[i].iov_len, is_write,
s->iovec.iov[i].iov_len);
}
qemu_iovec_destroy(&s->iovec);
qemu_sglist_destroy(&s->sg);
}
static void ide_dma_error(IDEState *s)
@ -1006,39 +993,6 @@ static int dma_buf_rw(BMDMAState *bm, int is_write)
return 1;
}
typedef struct {
BMDMAState *bm;
void (*cb)(void *opaque, int ret);
QEMUBH *bh;
} MapFailureContinuation;
static void reschedule_dma(void *opaque)
{
MapFailureContinuation *cont = opaque;
cont->cb(cont->bm, 0);
qemu_bh_delete(cont->bh);
qemu_free(cont);
}
static void continue_after_map_failure(void *opaque)
{
MapFailureContinuation *cont = opaque;
cont->bh = qemu_bh_new(reschedule_dma, opaque);
qemu_bh_schedule(cont->bh);
}
static void wait_for_bounce_buffer(BMDMAState *bmdma,
void (*cb)(void *opaque, int ret))
{
MapFailureContinuation *cont = qemu_malloc(sizeof(*cont));
cont->bm = bmdma;
cont->cb = cb;
cpu_register_map_client(cont, continue_after_map_failure);
}
static void ide_read_dma_cb(void *opaque, int ret)
{
BMDMAState *bm = opaque;
@ -1080,15 +1034,10 @@ static void ide_read_dma_cb(void *opaque, int ret)
s->io_buffer_size = n * 512;
if (dma_buf_prepare(bm, 1) == 0)
goto eot;
if (!s->iovec.niov) {
wait_for_bounce_buffer(bm, ide_read_dma_cb);
return;
}
#ifdef DEBUG_AIO
printf("aio_read: sector_num=%" PRId64 " n=%d\n", sector_num, n);
#endif
bm->aiocb = bdrv_aio_readv(s->bs, sector_num, &s->iovec, n,
ide_read_dma_cb, bm);
bm->aiocb = dma_bdrv_read(s->bs, &s->sg, sector_num, ide_read_dma_cb, bm);
ide_dma_submit_check(s, ide_read_dma_cb, bm);
}
@ -1209,15 +1158,10 @@ static void ide_write_dma_cb(void *opaque, int ret)
/* launch next transfer */
if (dma_buf_prepare(bm, 0) == 0)
goto eot;
if (!s->iovec.niov) {
wait_for_bounce_buffer(bm, ide_write_dma_cb);
return;
}
#ifdef DEBUG_AIO
printf("aio_write: sector_num=%" PRId64 " n=%d\n", sector_num, n);
#endif
bm->aiocb = bdrv_aio_writev(s->bs, sector_num, &s->iovec, n,
ide_write_dma_cb, bm);
bm->aiocb = dma_bdrv_write(s->bs, &s->sg, sector_num, ide_write_dma_cb, bm);
ide_dma_submit_check(s, ide_write_dma_cb, bm);
}