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drm/amdgpu: expand sienna chichlid reg access support

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Added dedicated 64bit reg read/write support

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
John Clements 2020-07-22 09:40:11 +08:00 committed by Alex Deucher
parent 2342ef4e60
commit ebfbd1c2ca
1 changed files with 45 additions and 0 deletions
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45
drivers/gpu/drm/amd/amdgpu/nv.c
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@ -97,6 +97,49 @@ static void nv_pcie_wreg(struct amdgpu_device *adev, u32 reg, u32 v)
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}
static u64 nv_pcie_rreg64(struct amdgpu_device *adev, u32 reg)
{
unsigned long flags, address, data;
u64 r;
address = adev->nbio.funcs->get_pcie_index_offset(adev);
data = adev->nbio.funcs->get_pcie_data_offset(adev);
spin_lock_irqsave(&adev->pcie_idx_lock, flags);
/* read low 32 bit */
WREG32(address, reg);
(void)RREG32(address);
r = RREG32(data);
/* read high 32 bit*/
WREG32(address, reg + 4);
(void)RREG32(address);
r |= ((u64)RREG32(data) << 32);
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
return r;
}
static void nv_pcie_wreg64(struct amdgpu_device *adev, u32 reg, u64 v)
{
unsigned long flags, address, data;
address = adev->nbio.funcs->get_pcie_index_offset(adev);
data = adev->nbio.funcs->get_pcie_data_offset(adev);
spin_lock_irqsave(&adev->pcie_idx_lock, flags);
/* write low 32 bit */
WREG32(address, reg);
(void)RREG32(address);
WREG32(data, (u32)(v & 0xffffffffULL));
(void)RREG32(data);
/* write high 32 bit */
WREG32(address, reg + 4);
(void)RREG32(address);
WREG32(data, (u32)(v >> 32));
(void)RREG32(data);
spin_unlock_irqrestore(&adev->pcie_idx_lock, flags);
}
static u32 nv_didt_rreg(struct amdgpu_device *adev, u32 reg)
{
unsigned long flags, address, data;
@ -673,6 +716,8 @@ static int nv_common_early_init(void *handle)
adev->smc_wreg = NULL;
adev->pcie_rreg = &nv_pcie_rreg;
adev->pcie_wreg = &nv_pcie_wreg;
adev->pcie_rreg64 = &nv_pcie_rreg64;
adev->pcie_wreg64 = &nv_pcie_wreg64;
/* TODO: will add them during VCN v2 implementation */
adev->uvd_ctx_rreg = NULL;