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hw/pci: Document pci_dma_map() 

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220111184309.28637-5-f4bug@amsat.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2021-12-31 11:51:52 +01:00 committed by Philippe Mathieu-Daudé
parent e0431aafc4
commit 1efc6b319c
1 changed files with 12 additions and 0 deletions
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12
include/hw/pci/pci.h
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@ -881,6 +881,18 @@ PCI_DMA_DEFINE_LDST(q_be, q_be, 64);
#undef PCI_DMA_DEFINE_LDST #undef PCI_DMA_DEFINE_LDST
/**
* pci_dma_map: Map device PCI address space range into host virtual address
* @dev: #PCIDevice to be accessed
* @addr: address within that device's address space
* @plen: pointer to length of buffer; updated on return to indicate
* if only a subset of the requested range has been mapped
* @dir: indicates the transfer direction
*
* Return: A host pointer, or %NULL if the resources needed to
* perform the mapping are exhausted (in that case *@plen
* is set to zero).
*/
static inline void *pci_dma_map(PCIDevice *dev, dma_addr_t addr, static inline void *pci_dma_map(PCIDevice *dev, dma_addr_t addr,
dma_addr_t *plen, DMADirection dir) dma_addr_t *plen, DMADirection dir)
{ {