diff options
Diffstat (limited to 'include/sysemu/dma.h')
| -rw-r--r-- | include/sysemu/dma.h | 144 |
1 files changed, 39 insertions, 105 deletions
diff --git a/include/sysemu/dma.h b/include/sysemu/dma.h index 02e0dcdfeb..031d1f5fb3 100644 --- a/include/sysemu/dma.h +++ b/include/sysemu/dma.h @@ -12,11 +12,11 @@ #include <stdio.h> #include "exec/memory.h" +#include "exec/address-spaces.h" #include "hw/hw.h" #include "block/block.h" #include "sysemu/kvm.h" -typedef struct DMAContext DMAContext; typedef struct ScatterGatherEntry ScatterGatherEntry; typedef enum { @@ -29,7 +29,7 @@ struct QEMUSGList { int nsg; int nalloc; size_t size; - DMAContext *dma; + AddressSpace *as; }; #ifndef CONFIG_USER_ONLY @@ -46,34 +46,7 @@ typedef uint64_t dma_addr_t; #define DMA_ADDR_BITS 64 #define DMA_ADDR_FMT "%" PRIx64 -typedef int DMATranslateFunc(DMAContext *dma, - dma_addr_t addr, - hwaddr *paddr, - hwaddr *len, - DMADirection dir); -typedef void* DMAMapFunc(DMAContext *dma, - dma_addr_t addr, - dma_addr_t *len, - DMADirection dir); -typedef void DMAUnmapFunc(DMAContext *dma, - void *buffer, - dma_addr_t len, - DMADirection dir, - dma_addr_t access_len); - -struct DMAContext { - AddressSpace *as; - DMATranslateFunc *translate; - DMAMapFunc *map; - DMAUnmapFunc *unmap; -}; - -/* A global DMA context corresponding to the address_space_memory - * AddressSpace, for sysbus devices which do DMA. - */ -extern DMAContext dma_context_memory; - -static inline void dma_barrier(DMAContext *dma, DMADirection dir) +static inline void dma_barrier(AddressSpace *as, DMADirection dir) { /* * This is called before DMA read and write operations @@ -98,144 +71,108 @@ static inline void dma_barrier(DMAContext *dma, DMADirection dir) } } -static inline bool dma_has_iommu(DMAContext *dma) -{ - return dma && dma->translate; -} - /* Checks that the given range of addresses is valid for DMA. This is * useful for certain cases, but usually you should just use * dma_memory_{read,write}() and check for errors */ -bool iommu_dma_memory_valid(DMAContext *dma, dma_addr_t addr, dma_addr_t len, - DMADirection dir); -static inline bool dma_memory_valid(DMAContext *dma, +static inline bool dma_memory_valid(AddressSpace *as, dma_addr_t addr, dma_addr_t len, DMADirection dir) { - if (!dma_has_iommu(dma)) { - return address_space_access_valid(dma->as, addr, len, - dir == DMA_DIRECTION_FROM_DEVICE); - } else { - return iommu_dma_memory_valid(dma, addr, len, dir); - } + return address_space_access_valid(as, addr, len, + dir == DMA_DIRECTION_FROM_DEVICE); } -int iommu_dma_memory_rw(DMAContext *dma, dma_addr_t addr, - void *buf, dma_addr_t len, DMADirection dir); -static inline int dma_memory_rw_relaxed(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_rw_relaxed(AddressSpace *as, dma_addr_t addr, void *buf, dma_addr_t len, DMADirection dir) { - if (!dma_has_iommu(dma)) { - /* Fast-path for no IOMMU */ - address_space_rw(dma->as, addr, buf, len, dir == DMA_DIRECTION_FROM_DEVICE); - return 0; - } else { - return iommu_dma_memory_rw(dma, addr, buf, len, dir); - } + return address_space_rw(as, addr, buf, len, dir == DMA_DIRECTION_FROM_DEVICE); } -static inline int dma_memory_read_relaxed(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_read_relaxed(AddressSpace *as, dma_addr_t addr, void *buf, dma_addr_t len) { - return dma_memory_rw_relaxed(dma, addr, buf, len, DMA_DIRECTION_TO_DEVICE); + return dma_memory_rw_relaxed(as, addr, buf, len, DMA_DIRECTION_TO_DEVICE); } -static inline int dma_memory_write_relaxed(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_write_relaxed(AddressSpace *as, dma_addr_t addr, const void *buf, dma_addr_t len) { - return dma_memory_rw_relaxed(dma, addr, (void *)buf, len, + return dma_memory_rw_relaxed(as, addr, (void *)buf, len, DMA_DIRECTION_FROM_DEVICE); } -static inline int dma_memory_rw(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_rw(AddressSpace *as, dma_addr_t addr, void *buf, dma_addr_t len, DMADirection dir) { - dma_barrier(dma, dir); + dma_barrier(as, dir); - return dma_memory_rw_relaxed(dma, addr, buf, len, dir); + return dma_memory_rw_relaxed(as, addr, buf, len, dir); } -static inline int dma_memory_read(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_read(AddressSpace *as, dma_addr_t addr, void *buf, dma_addr_t len) { - return dma_memory_rw(dma, addr, buf, len, DMA_DIRECTION_TO_DEVICE); + return dma_memory_rw(as, addr, buf, len, DMA_DIRECTION_TO_DEVICE); } -static inline int dma_memory_write(DMAContext *dma, dma_addr_t addr, +static inline int dma_memory_write(AddressSpace *as, dma_addr_t addr, const void *buf, dma_addr_t len) { - return dma_memory_rw(dma, addr, (void *)buf, len, + return dma_memory_rw(as, addr, (void *)buf, len, DMA_DIRECTION_FROM_DEVICE); } -int iommu_dma_memory_set(DMAContext *dma, dma_addr_t addr, uint8_t c, - dma_addr_t len); - -int dma_memory_set(DMAContext *dma, dma_addr_t addr, uint8_t c, dma_addr_t len); +int dma_memory_set(AddressSpace *as, dma_addr_t addr, uint8_t c, dma_addr_t len); -void *iommu_dma_memory_map(DMAContext *dma, - dma_addr_t addr, dma_addr_t *len, - DMADirection dir); -static inline void *dma_memory_map(DMAContext *dma, +static inline void *dma_memory_map(AddressSpace *as, dma_addr_t addr, dma_addr_t *len, DMADirection dir) { - if (!dma_has_iommu(dma)) { - hwaddr xlen = *len; - void *p; - - p = address_space_map(dma->as, addr, &xlen, dir == DMA_DIRECTION_FROM_DEVICE); - *len = xlen; - return p; - } else { - return iommu_dma_memory_map(dma, addr, len, dir); - } + hwaddr xlen = *len; + void *p; + + p = address_space_map(as, addr, &xlen, dir == DMA_DIRECTION_FROM_DEVICE); + *len = xlen; + return p; } -void iommu_dma_memory_unmap(DMAContext *dma, - void *buffer, dma_addr_t len, - DMADirection dir, dma_addr_t access_len); -static inline void dma_memory_unmap(DMAContext *dma, +static inline void dma_memory_unmap(AddressSpace *as, void *buffer, dma_addr_t len, DMADirection dir, dma_addr_t access_len) { - if (!dma_has_iommu(dma)) { - address_space_unmap(dma->as, buffer, (hwaddr)len, - dir == DMA_DIRECTION_FROM_DEVICE, access_len); - } else { - iommu_dma_memory_unmap(dma, buffer, len, dir, access_len); - } + address_space_unmap(as, buffer, (hwaddr)len, + dir == DMA_DIRECTION_FROM_DEVICE, access_len); } #define DEFINE_LDST_DMA(_lname, _sname, _bits, _end) \ - static inline uint##_bits##_t ld##_lname##_##_end##_dma(DMAContext *dma, \ + static inline uint##_bits##_t ld##_lname##_##_end##_dma(AddressSpace *as, \ dma_addr_t addr) \ { \ uint##_bits##_t val; \ - dma_memory_read(dma, addr, &val, (_bits) / 8); \ + dma_memory_read(as, addr, &val, (_bits) / 8); \ return _end##_bits##_to_cpu(val); \ } \ - static inline void st##_sname##_##_end##_dma(DMAContext *dma, \ + static inline void st##_sname##_##_end##_dma(AddressSpace *as, \ dma_addr_t addr, \ uint##_bits##_t val) \ { \ val = cpu_to_##_end##_bits(val); \ - dma_memory_write(dma, addr, &val, (_bits) / 8); \ + dma_memory_write(as, addr, &val, (_bits) / 8); \ } -static inline uint8_t ldub_dma(DMAContext *dma, dma_addr_t addr) +static inline uint8_t ldub_dma(AddressSpace *as, dma_addr_t addr) { uint8_t val; - dma_memory_read(dma, addr, &val, 1); + dma_memory_read(as, addr, &val, 1); return val; } -static inline void stb_dma(DMAContext *dma, dma_addr_t addr, uint8_t val) +static inline void stb_dma(AddressSpace *as, dma_addr_t addr, uint8_t val) { - dma_memory_write(dma, addr, &val, 1); + dma_memory_write(as, addr, &val, 1); } DEFINE_LDST_DMA(uw, w, 16, le); @@ -247,15 +184,12 @@ DEFINE_LDST_DMA(q, q, 64, be); #undef DEFINE_LDST_DMA -void dma_context_init(DMAContext *dma, AddressSpace *as, DMATranslateFunc translate, - DMAMapFunc map, DMAUnmapFunc unmap); - struct ScatterGatherEntry { dma_addr_t base; dma_addr_t len; }; -void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint, DMAContext *dma); +void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint, AddressSpace *as); void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg); #endif |