From bed9bcfa3275a9cfee82846a9f521c4858a9739a Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Wed, 6 Jun 2018 15:09:51 -0400 Subject: [PATCH] ide: push end_transfer_func out of start_transfer callback, rename callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: John Snow Reviewed-by: John Snow Reviewed-by: Philippe Mathieu-Daudé Message-id: 20180606190955.20845-4-jsnow@redhat.com Signed-off-by: John Snow --- 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 f25bef501d..f7852be842 100644 --- a/hw/ide/ahci.c +++ b/hw/ide/ahci.c @@ -1340,8 +1340,8 @@ 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]; @@ -1365,9 +1365,9 @@ 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) { @@ -1382,7 +1382,6 @@ 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, @@ -1503,7 +1502,7 @@ 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 e6bd95f52f..65d6f9034d 100644 --- a/hw/ide/trace-events +++ b/hw/ide/trace-events @@ -108,7 +108,7 @@ 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;