diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/pci.h | 67 |
1 files changed, 67 insertions, 0 deletions
@@ -5,6 +5,7 @@ #include "qdev.h" #include "memory.h" +#include "dma.h" /* PCI includes legacy ISA access. */ #include "isa.h" @@ -483,4 +484,70 @@ static inline uint32_t pci_config_size(const PCIDevice *d) return pci_is_express(d) ? PCIE_CONFIG_SPACE_SIZE : PCI_CONFIG_SPACE_SIZE; } +/* DMA access functions */ +static inline int pci_dma_rw(PCIDevice *dev, dma_addr_t addr, + void *buf, dma_addr_t len, DMADirection dir) +{ + cpu_physical_memory_rw(addr, buf, len, dir == DMA_DIRECTION_FROM_DEVICE); + return 0; +} + +static inline int pci_dma_read(PCIDevice *dev, dma_addr_t addr, + void *buf, dma_addr_t len) +{ + 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) +{ + return pci_dma_rw(dev, addr, (void *) buf, len, DMA_DIRECTION_FROM_DEVICE); +} + +#define PCI_DMA_DEFINE_LDST(_l, _s, _bits) \ + static inline uint##_bits##_t ld##_l##_pci_dma(PCIDevice *dev, \ + dma_addr_t addr) \ + { \ + return ld##_l##_phys(addr); \ + } \ + static inline void st##_s##_pci_dma(PCIDevice *dev, \ + dma_addr_t addr, uint##_bits##_t val) \ + { \ + st##_s##_phys(addr, val); \ + } + +PCI_DMA_DEFINE_LDST(ub, b, 8); +PCI_DMA_DEFINE_LDST(uw_le, w_le, 16) +PCI_DMA_DEFINE_LDST(l_le, l_le, 32); +PCI_DMA_DEFINE_LDST(q_le, q_le, 64); +PCI_DMA_DEFINE_LDST(uw_be, w_be, 16) +PCI_DMA_DEFINE_LDST(l_be, l_be, 32); +PCI_DMA_DEFINE_LDST(q_be, q_be, 64); + +#undef PCI_DMA_DEFINE_LDST + +static inline void *pci_dma_map(PCIDevice *dev, dma_addr_t addr, + dma_addr_t *plen, DMADirection dir) +{ + target_phys_addr_t len = *plen; + void *buf; + + buf = cpu_physical_memory_map(addr, &len, dir == DMA_DIRECTION_FROM_DEVICE); + *plen = len; + return buf; +} + +static inline void pci_dma_unmap(PCIDevice *dev, void *buffer, dma_addr_t len, + DMADirection dir, dma_addr_t access_len) +{ + cpu_physical_memory_unmap(buffer, len, dir == DMA_DIRECTION_FROM_DEVICE, + access_len); +} + +static inline void pci_dma_sglist_init(QEMUSGList *qsg, PCIDevice *dev, + int alloc_hint) +{ + qemu_sglist_init(qsg, alloc_hint); +} + #endif |