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[Qemu-devel] [PATCH 3/7] ide: push end_transfer_func out of start_transf
From: |
John Snow |
Subject: |
[Qemu-devel] [PATCH 3/7] ide: push end_transfer_func out of start_transfer callback, rename callback |
Date: |
Wed, 6 Jun 2018 15:09:51 -0400 |
From: Paolo Bonzini <address@hidden>
Now that end_transfer_func is a tail call in ahci_start_transfer,
formalize the fact that the callback (of which ahci_start_transfer is
the sole implementation) takes care of the transfer too: rename it to
pio_transfer and, if it is present, call the end_transfer_func as soon
as it returns.
Signed-off-by: Paolo Bonzini <address@hidden>
Signed-off-by: John Snow <address@hidden>
---
hw/ide/ahci.c | 13 ++++++-------
hw/ide/core.c | 8 +++++---
hw/ide/trace-events | 2 +-
include/hw/ide/internal.h | 2 +-
4 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
index 5871333686..89127f5fb6 100644
--- a/hw/ide/ahci.c
+++ b/hw/ide/ahci.c
@@ -1279,8 +1279,8 @@ out:
return 0;
}
-/* DMA dev <-> ram */
-static void ahci_start_transfer(IDEDMA *dma)
+/* Transfer PIO data between RAM and device */
+static void ahci_pio_transfer(IDEDMA *dma)
{
AHCIDevice *ad = DO_UPCAST(AHCIDevice, dma, dma);
IDEState *s = &ad->port.ifs[0];
@@ -1304,9 +1304,9 @@ static void ahci_start_transfer(IDEDMA *dma)
has_sglist = 1;
}
- trace_ahci_start_transfer(ad->hba, ad->port_no, is_write ? "writ" : "read",
- size, is_atapi ? "atapi" : "ata",
- has_sglist ? "" : "o");
+ trace_ahci_pio_transfer(ad->hba, ad->port_no, is_write ? "writ" : "read",
+ size, is_atapi ? "atapi" : "ata",
+ has_sglist ? "" : "o");
if (has_sglist && size) {
if (is_write) {
@@ -1321,7 +1321,6 @@ static void ahci_start_transfer(IDEDMA *dma)
out:
/* declare that we processed everything */
s->data_ptr = s->data_end;
- s->end_transfer_func(s);
}
static void ahci_start_dma(IDEDMA *dma, IDEState *s,
@@ -1437,7 +1436,7 @@ static const IDEDMAOps ahci_dma_ops = {
.start_dma = ahci_start_dma,
.restart = ahci_restart,
.restart_dma = ahci_restart_dma,
- .start_transfer = ahci_start_transfer,
+ .pio_transfer = ahci_pio_transfer,
.prepare_buf = ahci_dma_prepare_buf,
.commit_buf = ahci_commit_buf,
.rw_buf = ahci_dma_rw_buf,
diff --git a/hw/ide/core.c b/hw/ide/core.c
index cc9ca28c33..1a6cb337bf 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -526,16 +526,18 @@ static void ide_clear_retry(IDEState *s)
void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
EndTransferFunc *end_transfer_func)
{
- s->end_transfer_func = end_transfer_func;
s->data_ptr = buf;
s->data_end = buf + size;
ide_set_retry(s);
if (!(s->status & ERR_STAT)) {
s->status |= DRQ_STAT;
}
- if (s->bus->dma->ops->start_transfer) {
- s->bus->dma->ops->start_transfer(s->bus->dma);
+ if (!s->bus->dma->ops->pio_transfer) {
+ s->end_transfer_func = end_transfer_func;
+ return;
}
+ s->bus->dma->ops->pio_transfer(s->bus->dma);
+ end_transfer_func(s);
}
static void ide_cmd_done(IDEState *s)
diff --git a/hw/ide/trace-events b/hw/ide/trace-events
index 5c0e59ec42..153a7a62c9 100644
--- a/hw/ide/trace-events
+++ b/hw/ide/trace-events
@@ -101,7 +101,7 @@ handle_cmd_badport(void *s, int port) "ahci(%p)[%d]: guest
accessed unused port"
handle_cmd_badfis(void *s, int port) "ahci(%p)[%d]: guest provided an invalid
cmd FIS"
handle_cmd_badmap(void *s, int port, uint64_t len) "ahci(%p)[%d]:
dma_memory_map failed, 0x%02"PRIx64" != 0x80"
handle_cmd_unhandled_fis(void *s, int port, uint8_t b0, uint8_t b1, uint8_t
b2) "ahci(%p)[%d]: unhandled FIS type. cmd_fis: 0x%02x-%02x-%02x"
-ahci_start_transfer(void *s, int port, const char *rw, uint32_t size, const
char *tgt, const char *sgl) "ahci(%p)[%d]: %sing %d bytes on %s w/%s sglist"
+ahci_pio_transfer(void *s, int port, const char *rw, uint32_t size, const char
*tgt, const char *sgl) "ahci(%p)[%d]: %sing %d bytes on %s w/%s sglist"
ahci_start_dma(void *s, int port) "ahci(%p)[%d]: start dma"
ahci_dma_prepare_buf(void *s, int port, int32_t io_buffer_size, int32_t limit)
"ahci(%p)[%d]: prepare buf limit=%"PRId32" prepared=%"PRId32
ahci_dma_prepare_buf_fail(void *s, int port) "ahci(%p)[%d]: sglist population
failed"
diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h
index 88212f59df..f3de6f9b73 100644
--- a/include/hw/ide/internal.h
+++ b/include/hw/ide/internal.h
@@ -444,7 +444,7 @@ struct IDEState {
struct IDEDMAOps {
DMAStartFunc *start_dma;
- DMAVoidFunc *start_transfer;
+ DMAVoidFunc *pio_transfer;
DMAInt32Func *prepare_buf;
DMAu32Func *commit_buf;
DMAIntFunc *rw_buf;
--
2.14.3
- [Qemu-devel] [PATCH 0/7] atapi: change unlimited recursion to while loop, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 7/7] ide: introduce ide_transfer_start_norecurse, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 4/7] ide: call ide_cmd_done from ide_transfer_stop, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 2/7] ahci: move PIO Setup FIS before transfer, fix it for ATAPI commands, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 3/7] ide: push end_transfer_func out of start_transfer callback, rename callback,
John Snow <=
- [Qemu-devel] [PATCH 5/7] ide: make ide_transfer_stop idempotent, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 6/7] atapi: call ide_set_irq before ide_transfer_start, John Snow, 2018/06/06
- [Qemu-devel] [PATCH 1/7] libqos/ahci: track sector size, John Snow, 2018/06/06
- Re: [Qemu-devel] [PATCH 0/7] atapi: change unlimited recursion to while loop, John Snow, 2018/06/06
- Re: [Qemu-devel] [PATCH 0/7] atapi: change unlimited recursion to while loop, John Snow, 2018/06/06