diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 07bc0f504713..e1288901beb6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -820,3 +820,148 @@ void amdgpu_virt_update_sriov_video_codec(struct amdgpu_device *adev, } } } + +static bool amdgpu_virt_get_rlcg_reg_access_flag(struct amdgpu_device *adev, + u32 acc_flags, u32 hwip, + bool write, u32 *rlcg_flag) +{ + bool ret = false; + + switch (hwip) { + case GC_HWIP: + if (amdgpu_sriov_reg_indirect_gc(adev)) { + *rlcg_flag = + write ? AMDGPU_RLCG_GC_WRITE : AMDGPU_RLCG_GC_READ; + ret = true; + /* only in new version, AMDGPU_REGS_NO_KIQ and + * AMDGPU_REGS_RLC are enabled simultaneously */ + } else if ((acc_flags & AMDGPU_REGS_RLC) && + !(acc_flags & AMDGPU_REGS_NO_KIQ)) { + *rlcg_flag = AMDGPU_RLCG_GC_WRITE_LEGACY; + ret = true; + } + break; + case MMHUB_HWIP: + if (amdgpu_sriov_reg_indirect_mmhub(adev) && + (acc_flags & AMDGPU_REGS_RLC) && write) { + *rlcg_flag = AMDGPU_RLCG_MMHUB_WRITE; + ret = true; + } + break; + default: + break; + } + return ret; +} + +static u32 amdgpu_virt_rlcg_reg_rw(struct amdgpu_device *adev, u32 offset, u32 v, u32 flag) +{ + struct amdgpu_rlcg_reg_access_ctrl *reg_access_ctrl; + uint32_t timeout = 50000; + uint32_t i, tmp; + uint32_t ret = 0; + static void *scratch_reg0; + static void *scratch_reg1; + static void *scratch_reg2; + static void *scratch_reg3; + static void *spare_int; + + if (!adev->gfx.rlc.rlcg_reg_access_supported) { + dev_err(adev->dev, + "indirect registers access through rlcg is not available\n"); + return 0; + } + + reg_access_ctrl = &adev->gfx.rlc.reg_access_ctrl; + scratch_reg0 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg0; + scratch_reg1 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg1; + scratch_reg2 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg2; + scratch_reg3 = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->scratch_reg3; + if (reg_access_ctrl->spare_int) + spare_int = (void __iomem *)adev->rmmio + 4 * reg_access_ctrl->spare_int; + + if (offset == reg_access_ctrl->grbm_cntl) { + /* if the target reg offset is grbm_cntl, write to scratch_reg2 */ + writel(v, scratch_reg2); + writel(v, ((void __iomem *)adev->rmmio) + (offset * 4)); + } else if (offset == reg_access_ctrl->grbm_idx) { + /* if the target reg offset is grbm_idx, write to scratch_reg3 */ + writel(v, scratch_reg3); + writel(v, ((void __iomem *)adev->rmmio) + (offset * 4)); + } else { + /* + * SCRATCH_REG0 = read/write value + * SCRATCH_REG1[30:28] = command + * SCRATCH_REG1[19:0] = address in dword + * SCRATCH_REG1[26:24] = Error reporting + */ + writel(v, scratch_reg0); + writel((offset | flag), scratch_reg1); + if (reg_access_ctrl->spare_int) + writel(1, spare_int); + + for (i = 0; i < timeout; i++) { + tmp = readl(scratch_reg1); + if (!(tmp & flag)) + break; + udelay(10); + } + + if (i >= timeout) { + if (amdgpu_sriov_rlcg_error_report_enabled(adev)) { + if (tmp & AMDGPU_RLCG_VFGATE_DISABLED) { + dev_err(adev->dev, + "vfgate is disabled, rlcg failed to program reg: 0x%05x\n", offset); + } else if (tmp & AMDGPU_RLCG_WRONG_OPERATION_TYPE) { + dev_err(adev->dev, + "wrong operation type, rlcg failed to program reg: 0x%05x\n", offset); + } else if (tmp & AMDGPU_RLCG_REG_NOT_IN_RANGE) { + dev_err(adev->dev, + "regiser is not in range, rlcg failed to program reg: 0x%05x\n", offset); + } else { + dev_err(adev->dev, + "unknown error type, rlcg failed to program reg: 0x%05x\n", offset); + } + } else { + dev_err(adev->dev, + "timeout: rlcg faled to program reg: 0x%05x\n", offset); + } + } + } + + ret = readl(scratch_reg0); + return ret; +} + +void amdgpu_sriov_wreg(struct amdgpu_device *adev, + u32 offset, u32 value, + u32 acc_flags, u32 hwip) +{ + u32 rlcg_flag; + + if (!amdgpu_sriov_runtime(adev) && + amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, true, &rlcg_flag)) { + amdgpu_virt_rlcg_reg_rw(adev, offset, value, rlcg_flag); + return; + } + + if (acc_flags & AMDGPU_REGS_NO_KIQ) + WREG32_NO_KIQ(offset, value); + else + WREG32(offset, value); +} + +u32 amdgpu_sriov_rreg(struct amdgpu_device *adev, + u32 offset, u32 acc_flags, u32 hwip) +{ + u32 rlcg_flag; + + if (!amdgpu_sriov_runtime(adev) && + amdgpu_virt_get_rlcg_reg_access_flag(adev, acc_flags, hwip, false, &rlcg_flag)) + return amdgpu_virt_rlcg_reg_rw(adev, offset, 0, rlcg_flag); + + if (acc_flags & AMDGPU_REGS_NO_KIQ) + return RREG32_NO_KIQ(offset); + else + return RREG32(offset); +} |