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drm/amdgpu: support access regs outside of mmio bar

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add indirect access support to registers outside of
mmio bar.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang
2020-04-08 16:18:52 +08:00
committed by Alex Deucher
parent f384ff95f6
commit 2eee0229f6
3 changed files with 28 additions and 39 deletions
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45
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -298,10 +298,10 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
}
/*
* MMIO register access helper functions.
* device register access helper functions.
*/
/**
* amdgpu_mm_rreg - read a memory mapped IO register
* amdgpu_device_rreg - read a register
*
* @adev: amdgpu_device pointer
* @reg: dword aligned register offset
@@ -309,8 +309,8 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
*
* Returns the 32 bit value from the offset specified.
*/
uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
uint32_t acc_flags)
uint32_t amdgpu_device_rreg(struct amdgpu_device *adev, uint32_t reg,
uint32_t acc_flags)
{
uint32_t ret;
@@ -319,15 +319,9 @@ uint32_t amdgpu_mm_rreg(struct amdgpu_device *adev, uint32_t reg,
if ((reg * 4) < adev->rmmio_size)
ret = readl(((void __iomem *)adev->rmmio) + (reg * 4));
else {
unsigned long flags;
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
ret = readl(((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
}
trace_amdgpu_mm_rreg(adev->pdev->device, reg, ret);
else
ret = adev->pcie_rreg(adev, (reg * 4));
trace_amdgpu_device_rreg(adev->pdev->device, reg, ret);
return ret;
}
@@ -373,24 +367,19 @@ void amdgpu_mm_wreg8(struct amdgpu_device *adev, uint32_t offset, uint8_t value)
BUG();
}
void static inline amdgpu_mm_wreg_mmio(struct amdgpu_device *adev, uint32_t reg, uint32_t v, uint32_t acc_flags)
void static inline amdgpu_device_wreg_no_kiq(struct amdgpu_device *adev, uint32_t reg,
uint32_t v, uint32_t acc_flags)
{
trace_amdgpu_mm_wreg(adev->pdev->device, reg, v);
trace_amdgpu_device_wreg(adev->pdev->device, reg, v);
if ((reg * 4) < adev->rmmio_size)
writel(v, ((void __iomem *)adev->rmmio) + (reg * 4));
else {
unsigned long flags;
spin_lock_irqsave(&adev->mmio_idx_lock, flags);
writel((reg * 4), ((void __iomem *)adev->rmmio) + (mmMM_INDEX * 4));
writel(v, ((void __iomem *)adev->rmmio) + (mmMM_DATA * 4));
spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
}
else
adev->pcie_wreg(adev, (reg * 4), v);
}
/**
* amdgpu_mm_wreg - write to a memory mapped IO register
* amdgpu_device_wreg - write to a register
*
* @adev: amdgpu_device pointer
* @reg: dword aligned register offset
@@ -399,13 +388,13 @@ void static inline amdgpu_mm_wreg_mmio(struct amdgpu_device *adev, uint32_t reg,
*
* Writes the value specified to the offset specified.
*/
void amdgpu_mm_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
uint32_t acc_flags)
void amdgpu_device_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v,
uint32_t acc_flags)
{
if (!(acc_flags & AMDGPU_REGS_NO_KIQ) && amdgpu_sriov_runtime(adev))
return amdgpu_kiq_wreg(adev, reg, v);
amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
amdgpu_device_wreg_no_kiq(adev, reg, v, acc_flags);
}
/*
@@ -424,7 +413,7 @@ void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev, uint32_t reg, uint32_t
return adev->gfx.rlc.funcs->rlcg_wreg(adev, reg, v);
}
amdgpu_mm_wreg_mmio(adev, reg, v, acc_flags);
amdgpu_device_wreg_no_kiq(adev, reg, v, acc_flags);
}
/**