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| author | Likun Gao <Likun.Gao@amd.com> | 2022-05-06 14:45:54 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-05-10 17:53:11 -0400 |
| commit | f932ffbbf6ffa9e8425e2d3775a799d3e670c31e (patch) | |
| tree | 5f63fa5f2bea44ac1c2650416155255302fc41bb /drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c | |
| parent | 1b491330421bb0fdeff8eb928ce83fdd636087d3 (diff) | |
| download | linux-f932ffbbf6ffa9e8425e2d3775a799d3e670c31e.tar.bz2 | |
drm/amdgpu: support mem copy for LSDMA
Support memory to memory linear copy in PIO mode for LSDMA.
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c index b611ade53be2..0d2bdd04bd76 100644 --- a/drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c +++ b/drivers/gpu/drm/amd/amdgpu/lsdma_v6_0.c @@ -29,5 +29,49 @@ #include "lsdma/lsdma_6_0_0_offset.h" #include "lsdma/lsdma_6_0_0_sh_mask.h" +static int lsdma_v6_0_copy_mem(struct amdgpu_device *adev, + uint64_t src_addr, + uint64_t dst_addr, + uint64_t size) +{ + uint32_t usec_timeout = 5000; /* wait for 5ms */ + uint32_t tmp, expect_val; + int i; + + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_SRC_ADDR_LO, lower_32_bits(src_addr)); + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_SRC_ADDR_HI, upper_32_bits(src_addr)); + + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_LO, lower_32_bits(dst_addr)); + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_DST_ADDR_HI, upper_32_bits(dst_addr)); + + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_CONTROL, 0x0); + + tmp = RREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, BYTE_COUNT, size); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_LOCATION, 0); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_LOCATION, 0); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, SRC_ADDR_INC, 0); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, DST_ADDR_INC, 0); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, OVERLAP_DISABLE, 0); + tmp = REG_SET_FIELD(tmp, LSDMA_PIO_COMMAND, CONSTANT_FILL, 0); + WREG32_SOC15(LSDMA, 0, regLSDMA_PIO_COMMAND, tmp); + + expect_val = LSDMA_PIO_STATUS__PIO_IDLE_MASK | LSDMA_PIO_STATUS__PIO_FIFO_EMPTY_MASK; + for (i = 0; i < usec_timeout; i++) { + tmp = RREG32_SOC15(LSDMA, 0, regLSDMA_PIO_STATUS); + if ((tmp & expect_val) == expect_val) + break; + udelay(1); + } + + if (i >= usec_timeout) { + dev_err(adev->dev, "LSDMA PIO failed to copy memory!\n"); + return -ETIMEDOUT; + } + + return 0; +} + const struct amdgpu_lsdma_funcs lsdma_v6_0_funcs = { + .copy_mem = lsdma_v6_0_copy_mem }; |