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drm/amdgpu/ih7.0: Enable retry CAM on Navi 4 dGPUs

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The retry CAM can filter interrupts which occur repeatedly,
such as page fault interrupts when retry faults are enabled.
This makes processing those interrupts much more efficient,
because the CPU won't have to deal with processing the same
interrupt repeatedly.

Also change the doorbell range to actually enable the
doorbell for the retry CAM.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Timur Kristóf 2026-08-28 13:41:13 +02:00 committed by Alex Deucher
parent 0347d728f4
commit f568cf5c2d
2 changed files with 3 additions and 2 deletions
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3
drivers/gpu/drm/amd/amdgpu/ih_v7_0.c
View File

@ -395,7 +395,8 @@ static int ih_v7_0_irq_init(struct amdgpu_device *adev)
pci_set_master(adev->pdev);
if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(7, 1, 0)) {
if (!(adev->flags & AMD_IS_APU) ||
amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(7, 1, 0)) {
/* Allocate the doorbell for IH Retry CAM */
adev->irq.retry_cam_doorbell_index = (adev->doorbell_index.ih + 2) << 1;
WREG32_SOC15(OSSSYS, 0, regIH_DOORBELL_RETRY_CAM,

2
drivers/gpu/drm/amd/amdgpu/nbif_v6_3_1.c
View File

@ -300,7 +300,7 @@ static void nbif_v6_3_1_ih_doorbell_range(struct amdgpu_device *adev,
ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
GDC_S2A0_S2A_DOORBELL_ENTRY_1_CTRL,
S2A_DOORBELL_PORT1_RANGE_SIZE,
2);
8);
ih_doorbell_range = REG_SET_FIELD(ih_doorbell_range,
GDC_S2A0_S2A_DOORBELL_ENTRY_1_CTRL,
S2A_DOORBELL_PORT1_AWADDR_31_28_VALUE,