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/* SPDX-License-Identifier: MIT */
/*
* Copyright © 2022 Intel Corporation
*/
#ifndef _XE_MAP_H_
#define _XE_MAP_H_
#include <linux/iosys-map.h>
#include <xe_device.h>
/**
* DOC: Map layer
*
* All access to any memory shared with a device (both sysmem and vram) in the
* XE driver should go through this layer (xe_map). This layer is built on top
* of :ref:`driver-api/device-io:Generalizing Access to System and I/O Memory`
* and with extra hooks into the XE driver that allows adding asserts to memory
* accesses (e.g. for blocking runtime_pm D3Cold on Discrete Graphics).
*/
static inline void xe_map_memcpy_to(struct xe_device *xe, struct iosys_map *dst,
size_t dst_offset, const void *src,
size_t len)
{
xe_device_assert_mem_access(xe);
iosys_map_memcpy_to(dst, dst_offset, src, len);
}
static inline void xe_map_memcpy_from(struct xe_device *xe, void *dst,
const struct iosys_map *src,
size_t src_offset, size_t len)
{
xe_device_assert_mem_access(xe);
iosys_map_memcpy_from(dst, src, src_offset, len);
}
static inline void xe_map_memset(struct xe_device *xe,
struct iosys_map *dst, size_t offset,
int value, size_t len)
{
xe_device_assert_mem_access(xe);
iosys_map_memset(dst, offset, value, len);
}
/* FIXME: We likely should kill these two functions sooner or later */
static inline u32 xe_map_read32(struct xe_device *xe, struct iosys_map *map)
{
xe_device_assert_mem_access(xe);
if (map->is_iomem)
return readl(map->vaddr_iomem);
else
return READ_ONCE(*(u32 *)map->vaddr);
}
static inline void xe_map_write32(struct xe_device *xe, struct iosys_map *map,
u32 val)
{
xe_device_assert_mem_access(xe);
if (map->is_iomem)
writel(val, map->vaddr_iomem);
else
*(u32 *)map->vaddr = val;
}
#define xe_map_rd(xe__, map__, offset__, type__) ({ \
struct xe_device *__xe = xe__; \
xe_device_assert_mem_access(__xe); \
iosys_map_rd(map__, offset__, type__); \
})
#define xe_map_wr(xe__, map__, offset__, type__, val__) ({ \
struct xe_device *__xe = xe__; \
xe_device_assert_mem_access(__xe); \
iosys_map_wr(map__, offset__, type__, val__); \
})
#define xe_map_rd_field(xe__, map__, struct_offset__, struct_type__, field__) ({ \
struct xe_device *__xe = xe__; \
xe_device_assert_mem_access(__xe); \
iosys_map_rd_field(map__, struct_offset__, struct_type__, field__); \
})
#define xe_map_wr_field(xe__, map__, struct_offset__, struct_type__, field__, val__) ({ \
struct xe_device *__xe = xe__; \
xe_device_assert_mem_access(__xe); \
iosys_map_wr_field(map__, struct_offset__, struct_type__, field__, val__); \
})
#endif
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