Message ID | 20200904162620.657726-4-philmd@redhat.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | pci: Let PCI DMA API functions propagate a MemTxResult | expand |
Philippe Mathieu-Daudé <philmd@redhat.com> 于2020年9月5日周六 上午12:26写道: > > pci_dma_rw() returns a MemTxResult type. > Do not discard it, return it to the caller. > > Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Li Qiang <liq3ea@gmail.com> > --- > include/hw/pci/pci.h | 16 ++++++++++++++-- > 1 file changed, 14 insertions(+), 2 deletions(-) > > diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h > index bb57525dffd..76826e240a9 100644 > --- a/include/hw/pci/pci.h > +++ b/include/hw/pci/pci.h > @@ -824,8 +824,20 @@ static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr, > return pci_dma_rw(dev, addr, buf, len, DMA_DIRECTION_TO_DEVICE); > } > > -static inline int pci_dma_write(PCIDevice *dev, dma_addr_t addr, > - const void *buf, dma_addr_t len) > +/** > + * pci_dma_write: Write to address space from PCI device. > + * > + * Return a MemTxResult indicating whether the operation succeeded > + * or failed (eg unassigned memory, device rejected the transaction, > + * IOMMU fault). > + * > + * @dev: #PCIDevice doing the memory access > + * @addr: address within the #PCIDevice address space > + * @buf: buffer with the data transferred > + * @len: the number of bytes to write > + */ > +static inline MemTxResult pci_dma_write(PCIDevice *dev, dma_addr_t addr, > + const void *buf, dma_addr_t len) > { > return pci_dma_rw(dev, addr, (void *) buf, len, DMA_DIRECTION_FROM_DEVICE); > } > -- > 2.26.2 > >
On 9/4/20 9:26 AM, Philippe Mathieu-Daudé wrote: > pci_dma_rw() returns a MemTxResult type. > Do not discard it, return it to the caller. > > Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> > --- > include/hw/pci/pci.h | 16 ++++++++++++++-- > 1 file changed, 14 insertions(+), 2 deletions(-) Reviewed-by: Richard Henderson <richard.henderson@linaro.org> r~
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index bb57525dffd..76826e240a9 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -824,8 +824,20 @@ static inline MemTxResult pci_dma_read(PCIDevice *dev, dma_addr_t addr, return pci_dma_rw(dev, addr, buf, len, DMA_DIRECTION_TO_DEVICE); } -static inline int pci_dma_write(PCIDevice *dev, dma_addr_t addr, - const void *buf, dma_addr_t len) +/** + * pci_dma_write: Write to address space from PCI device. + * + * Return a MemTxResult indicating whether the operation succeeded + * or failed (eg unassigned memory, device rejected the transaction, + * IOMMU fault). + * + * @dev: #PCIDevice doing the memory access + * @addr: address within the #PCIDevice address space + * @buf: buffer with the data transferred + * @len: the number of bytes to write + */ +static inline MemTxResult pci_dma_write(PCIDevice *dev, dma_addr_t addr, + const void *buf, dma_addr_t len) { return pci_dma_rw(dev, addr, (void *) buf, len, DMA_DIRECTION_FROM_DEVICE); }
pci_dma_rw() returns a MemTxResult type. Do not discard it, return it to the caller. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> --- include/hw/pci/pci.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)