On 6/19/2024 10:01 PM, Jane Jian wrote:
> [WHY]
> sriov has the higher bit violation when flushing tlb
>
> [HOW]
> normalize the registers to keep lower 16-bit(dword aligned) to aviod higher bit violation
> RLCG will mask xcd out and always assume it's accessing its own xcd
>
> [TODO]
> later will add the normalization in sriovw/rreg after fixing bugs
>
> v2
> rename the normalized macro, add ip block type for further use
>
In subject, part I etc. doesn't look good. Only put the intent - like
normalize xcc register offsets for TLB flush. Rest of the story may be
put in description.
> Signed-off-by: Jane Jian <Jane.Jian@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
> drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c | 16 ++++++++++++++++
> drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 10 ++++++++--
> drivers/gpu/drm/amd/amdgpu/soc15.c | 1 +
> drivers/gpu/drm/amd/amdgpu/soc15.h | 1 +
> drivers/gpu/drm/amd/amdgpu/soc15_common.h | 5 ++++-
> 6 files changed, 32 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index 083f353cff6e..eb2e7312bf1b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -636,6 +636,8 @@ struct amdgpu_asic_funcs {
> ssize_t (*get_reg_state)(struct amdgpu_device *adev,
> enum amdgpu_reg_state reg_state, void *buf,
> size_t max_size);
> + /* normalize offset to keep in lower 16-bit */
> + u32 (*normalize_reg_offset)(u32 hwip, u32 offset);
Please change the hwip argument type to enum amd_hw_ip_block_type.
> };
>
> /*
> diff --git a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
> index 2c9a0aa41e2d..9b4bea2ca7df 100644
> --- a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
> +++ b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
> @@ -1085,3 +1085,19 @@ ssize_t aqua_vanjaram_get_reg_state(struct amdgpu_device *adev,
>
> return size;
> }
> +
> +u32 aqua_vanjaram_normalize_reg_offset(u32 hwip, u32 offset)
> +{
> + u32 normalized_offset;
> +
> + switch (hwip) {
> + case GC_HWIP:
> + normalized_offset = offset & 0xffff;
> + break;
> + default:
> + normalized_offset = offset;
> + break;
> + }
> +
> + return normalized_offset;
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> index 88b4644f8e96..1d24e19f304d 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
> @@ -853,8 +853,14 @@ static void gmc_v9_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
> */
> if (adev->gfx.kiq[inst].ring.sched.ready &&
> (amdgpu_sriov_runtime(adev) || !amdgpu_sriov_vf(adev))) {
> - uint32_t req = hub->vm_inv_eng0_req + hub->eng_distance * eng;
> - uint32_t ack = hub->vm_inv_eng0_ack + hub->eng_distance * eng;
> +
> + /* Select lower 16 bits to write in local xcc
> + * for MMHUB it uses xcc0, NO cross AID reg offset
> + */
The comment about MMHUB is confusing. MMHUB offset in the current form
will be SOC wide, though it is passed to xcc0. Better remove it.
> + if (AMDGPU_IS_GFXHUB(vmhub)) {
> + req = NORMALIZE_XCC_REG_OFFSET(GC, req);
Since IP is parameter, naming the macro as XCC_REG_OFFSET doesn't suit.
Thanks,
Lijo
> + ack = NORMALIZE_XCC_REG_OFFSET(GC, ack);
> + }
>
> amdgpu_gmc_fw_reg_write_reg_wait(adev, req, ack, inv_req,
> 1 << vmid, inst);
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
> index 8d16dacdc172..e6e61fc77080 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -927,6 +927,7 @@ static const struct amdgpu_asic_funcs aqua_vanjaram_asic_funcs =
> .query_video_codecs = &soc15_query_video_codecs,
> .encode_ext_smn_addressing = &aqua_vanjaram_encode_ext_smn_addressing,
> .get_reg_state = &aqua_vanjaram_get_reg_state,
> + .normalize_reg_offset = &aqua_vanjaram_normalize_reg_offset,
> };
>
> static int soc15_common_early_init(void *handle)
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.h b/drivers/gpu/drm/amd/amdgpu/soc15.h
> index 282584a48be0..f1e974604e3e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.h
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.h
> @@ -124,4 +124,5 @@ ssize_t aqua_vanjaram_get_reg_state(struct amdgpu_device *adev,
> void vega10_doorbell_index_init(struct amdgpu_device *adev);
> void vega20_doorbell_index_init(struct amdgpu_device *adev);
> void aqua_vanjaram_doorbell_index_init(struct amdgpu_device *adev);
> +u32 aqua_vanjaram_normalize_reg_offset(u32 hwip, u32 offset);
> #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc15_common.h b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
> index 242b24f73c17..ddf0aad51821 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc15_common.h
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15_common.h
> @@ -210,4 +210,7 @@
> #define WREG64_MCA(ext, mca_base, idx, val) \
> WREG64_PCIE_EXT(adev->asic_funcs->encode_ext_smn_addressing(ext) + mca_base + (idx * 8), val)
>
> -#endif
> +#define NORMALIZE_XCC_REG_OFFSET(ip, offset) \
> + ((amdgpu_sriov_vf(adev) && adev->asic_funcs->normalize_reg_offset) ? \
> + adev->asic_funcs->normalize_reg_offset(ip##_HWIP, offset) : offset)
> +#endif
> \ No newline at end of file
