[AMD Official Use Only - General]
Reviewed-by: Tao Zhou <tao.zh...@amd.com>
> -----Original Message-----
> From: Zhang, Hawking <hawking.zh...@amd.com>
> Sent: Thursday, March 23, 2023 10:24 AM
> To: amd-gfx@lists.freedesktop.org; Zhou1, Tao <tao.zh...@amd.com>; Yang,
> Stanley <stanley.y...@amd.com>; Li, Candice <candice...@amd.com>; Chai,
> Thomas <yipeng.c...@amd.com>
> Cc: Zhang, Hawking <hawking.zh...@amd.com>
> Subject: [PATCH] drm/amdgpu: Add fatal error handling in nbio v4_3
>
> GPU will stop working once fatal error is detected.
> it will inform driver to do reset to recover from the fatal error.
>
> Signed-off-by: Hawking Zhang <hawking.zh...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 11 ++++
> drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c | 79 +++++++++++++++++++++++++
> drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h | 1 +
> drivers/gpu/drm/amd/amdgpu/soc21.c | 15 ++++-
> 4 files changed, 105 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index c6dc3cd2a9de..5b1779021881 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -34,6 +34,7 @@
> #include "amdgpu_atomfirmware.h"
> #include "amdgpu_xgmi.h"
> #include "ivsrcid/nbio/irqsrcs_nbif_7_4.h"
> +#include "nbio_v4_3.h"
> #include "atom.h"
> #include "amdgpu_reset.h"
>
> @@ -2562,6 +2563,16 @@ int amdgpu_ras_init(struct amdgpu_device *adev)
> if (!adev->gmc.xgmi.connected_to_cpu)
> adev->nbio.ras = &nbio_v7_4_ras;
> break;
> + case IP_VERSION(4, 3, 0):
> + if (adev->ras_hw_enabled | AMDGPU_RAS_BLOCK__DF)
> + /* unlike other generation of nbio ras,
> + * nbio v4_3 only support fatal error interrupt
> + * to inform software that DF is freezed due to
> + * system fatal error event. driver should not
> + * enable nbio ras in such case. Instead,
> + * check DF RAS */
> + adev->nbio.ras = &nbio_v4_3_ras;
> + break;
> default:
> /* nbio ras is not available */
> break;
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
> b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
> index 09fdcd20cb91..d5ed9e0e1a5f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.c
> @@ -26,6 +26,7 @@
>
> #include "nbio/nbio_4_3_0_offset.h"
> #include "nbio/nbio_4_3_0_sh_mask.h"
> +#include "ivsrcid/nbio/irqsrcs_nbif_7_4.h"
> #include <uapi/linux/kfd_ioctl.h>
>
> static void nbio_v4_3_remap_hdp_registers(struct amdgpu_device *adev) @@ -
> 538,3 +539,81 @@ const struct amdgpu_nbio_funcs nbio_v4_3_sriov_funcs = {
> .remap_hdp_registers = nbio_v4_3_remap_hdp_registers,
> .get_rom_offset = nbio_v4_3_get_rom_offset, };
> +
> +static int nbio_v4_3_set_ras_err_event_athub_irq_state(struct amdgpu_device
> *adev,
> + struct amdgpu_irq_src
> *src,
> + unsigned type,
> + enum
> amdgpu_interrupt_state state) {
> + /* The ras_controller_irq enablement should be done in psp bl when it
> + * tries to enable ras feature. Driver only need to set the correct
> interrupt
> + * vector for bare-metal and sriov use case respectively
> + */
> + uint32_t bif_doorbell_int_cntl;
> +
> + bif_doorbell_int_cntl = RREG32_SOC15(NBIO, 0,
> regBIF_BX0_BIF_DOORBELL_INT_CNTL);
> + bif_doorbell_int_cntl = REG_SET_FIELD(bif_doorbell_int_cntl,
> + BIF_BX0_BIF_DOORBELL_INT_CNTL,
> +
> RAS_ATHUB_ERR_EVENT_INTERRUPT_DISABLE,
> + (state ==
> AMDGPU_IRQ_STATE_ENABLE) ? 0 : 1);
> + WREG32_SOC15(NBIO, 0, regBIF_BX0_BIF_DOORBELL_INT_CNTL,
> +bif_doorbell_int_cntl);
> +
> + return 0;
> +}
> +
> +static int nbio_v4_3_process_err_event_athub_irq(struct amdgpu_device
> *adev,
> + struct amdgpu_irq_src
> *source,
> + struct amdgpu_iv_entry *entry)
> +{
> + /* By design, the ih cookie for err_event_athub_irq should be written
> + * to bif ring. since bif ring is not enabled, just leave process
> callback
> + * as a dummy one.
> + */
> + return 0;
> +}
> +
> +static const struct amdgpu_irq_src_funcs
> nbio_v4_3_ras_err_event_athub_irq_funcs = {
> + .set = nbio_v4_3_set_ras_err_event_athub_irq_state,
> + .process = nbio_v4_3_process_err_event_athub_irq,
> +};
> +
> +static void nbio_v4_3_handle_ras_err_event_athub_intr_no_bifring(struct
> +amdgpu_device *adev) {
> + uint32_t bif_doorbell_int_cntl;
> +
> + bif_doorbell_int_cntl = RREG32_SOC15(NBIO, 0,
> regBIF_BX0_BIF_DOORBELL_INT_CNTL);
> + if (REG_GET_FIELD(bif_doorbell_int_cntl,
> + BIF_DOORBELL_INT_CNTL,
> + RAS_ATHUB_ERR_EVENT_INTERRUPT_STATUS)) {
> + /* driver has to clear the interrupt status when bif ring is
> disabled */
> + bif_doorbell_int_cntl = REG_SET_FIELD(bif_doorbell_int_cntl,
> + BIF_DOORBELL_INT_CNTL,
> +
> RAS_ATHUB_ERR_EVENT_INTERRUPT_CLEAR, 1);
> + WREG32_SOC15(NBIO, 0,
> regBIF_BX0_BIF_DOORBELL_INT_CNTL, bif_doorbell_int_cntl);
> + amdgpu_ras_global_ras_isr(adev);
> + }
> +}
> +
> +static int nbio_v4_3_init_ras_err_event_athub_interrupt(struct
> +amdgpu_device *adev) {
> +
> + int r;
> +
> + /* init the irq funcs */
> + adev->nbio.ras_err_event_athub_irq.funcs =
> + &nbio_v4_3_ras_err_event_athub_irq_funcs;
> + adev->nbio.ras_err_event_athub_irq.num_types = 1;
> +
> + /* register ras err event athub interrupt
> + * nbio v4_3 uses the same irq source as nbio v7_4 */
> + r = amdgpu_irq_add_id(adev, SOC21_IH_CLIENTID_BIF,
> + NBIF_7_4__SRCID__ERREVENT_ATHUB_INTERRUPT,
> + &adev->nbio.ras_err_event_athub_irq);
> +
> + return r;
> +}
> +
> +struct amdgpu_nbio_ras nbio_v4_3_ras = {
> + .handle_ras_err_event_athub_intr_no_bifring =
> nbio_v4_3_handle_ras_err_event_athub_intr_no_bifring,
> + .init_ras_err_event_athub_interrupt =
> +nbio_v4_3_init_ras_err_event_athub_interrupt,
> +};
> diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
> b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
> index 711999ceedf4..399037cdf4fb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
> +++ b/drivers/gpu/drm/amd/amdgpu/nbio_v4_3.h
> @@ -29,5 +29,6 @@
> extern const struct nbio_hdp_flush_reg nbio_v4_3_hdp_flush_reg; extern const
> struct amdgpu_nbio_funcs nbio_v4_3_funcs; extern const struct
> amdgpu_nbio_funcs nbio_v4_3_sriov_funcs;
> +extern struct amdgpu_nbio_ras nbio_v4_3_ras;
>
> #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c
> b/drivers/gpu/drm/amd/amdgpu/soc21.c
> index 67580761b44d..514bfc705d5a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/soc21.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
> @@ -754,6 +754,14 @@ static int soc21_common_late_init(void *handle)
>
> sriov_vcn_4_0_0_video_codecs_decode_array_vcn0,
>
> ARRAY_SIZE(sriov_vcn_4_0_0_video_codecs_decode_array_vcn0));
> }
> + } else {
> + if (adev->nbio.ras &&
> + adev->nbio.ras_err_event_athub_irq.funcs)
> + /* don't need to fail gpu late init
> + * if enabling athub_err_event interrupt failed
> + * nbio v4_3 only support fatal error hanlding
> + * just enable the interrupt directly */
> + amdgpu_irq_get(adev, &adev-
> >nbio.ras_err_event_athub_irq, 0);
> }
>
> return 0;
> @@ -801,8 +809,13 @@ static int soc21_common_hw_fini(void *handle)
> /* disable the doorbell aperture */
> soc21_enable_doorbell_aperture(adev, false);
>
> - if (amdgpu_sriov_vf(adev))
> + if (amdgpu_sriov_vf(adev)) {
> xgpu_nv_mailbox_put_irq(adev);
> + } else {
> + if (adev->nbio.ras &&
> + adev->nbio.ras_err_event_athub_irq.funcs)
> + amdgpu_irq_put(adev, &adev-
> >nbio.ras_err_event_athub_irq, 0);
> + }
>
> return 0;
> }
> --
> 2.17.1
