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drm/amdgpu: Remap hdp coherency registers

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Remap HDP_MEM_COHERENCY_FLUSH_CNTL and HDP_REG_COHERENCY_FLUSH_CNTL
to an empty page in mmio space. We will later map this page to process
space so application can flush hdp. This can't be done properly at
those registers' original location because it will expose more than
desired registers to process space.

v2: Use explicit register hole location
v3: Moved remapped hdp registers into adev struct
v4: Use more generic name for remapped page
    Expose register offset in kfd_ioctl.h
v5: Move hdp register remap function to nbio ip function
v6: Fixed operator precedence issue and other bugs

Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Oak Zeng
2019-04-04 15:47:34 -05:00
committed by Alex Deucher
parent 4fde03a7ef
commit 88807dc8d5
5 changed files with 49 additions and 6 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu.h
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@@ -639,6 +639,11 @@ struct nbio_hdp_flush_reg {
u32 ref_and_mask_sdma1;
};
struct amdgpu_mmio_remap {
u32 reg_offset;
resource_size_t bus_addr;
};
struct amdgpu_nbio_funcs {
const struct nbio_hdp_flush_reg *hdp_flush_reg;
u32 (*get_hdp_flush_req_offset)(struct amdgpu_device *adev);
@@ -666,6 +671,7 @@ struct amdgpu_nbio_funcs {
void (*ih_control)(struct amdgpu_device *adev);
void (*init_registers)(struct amdgpu_device *adev);
void (*detect_hw_virt)(struct amdgpu_device *adev);
void (*remap_hdp_registers)(struct amdgpu_device *adev);
};
struct amdgpu_df_funcs {
@@ -764,6 +770,7 @@ struct amdgpu_device {
void __iomem *rmmio;
/* protects concurrent MM_INDEX/DATA based register access */
spinlock_t mmio_idx_lock;
struct amdgpu_mmio_remap rmmio_remap;
/* protects concurrent SMC based register access */
spinlock_t smc_idx_lock;
amdgpu_rreg_t smc_rreg;