drm/amdgpu: Rearm IRQ in Navi10 SR-IOV if IRQ lost (022b6518) · Commits · 戴 / test

drivers/gpu/drm/amd/amdgpu/navi10_ih.c

+36 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@
		#include "soc15_common.h"
		#include "navi10_ih.h"

		#define MAX_REARM_RETRY 10

		static void navi10_ih_set_interrupt_funcs(struct amdgpu_device *adev);

		@@ -283,6 +284,38 @@ static void navi10_ih_decode_iv(struct amdgpu_device *adev,
		ih->rptr += 32;
		}

		/**
		* navi10_ih_irq_rearm - rearm IRQ if lost
		*
		* @adev: amdgpu_device pointer
		*
		*/
		static void navi10_ih_irq_rearm(struct amdgpu_device *adev,
		struct amdgpu_ih_ring *ih)
		{
		uint32_t reg_rptr = 0;
		uint32_t v = 0;
		uint32_t i = 0;

		if (ih == &adev->irq.ih)
		reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
		else if (ih == &adev->irq.ih1)
		reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
		else if (ih == &adev->irq.ih2)
		reg_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
		else
		return;

		/* Rearm IRQ / re-write doorbell if doorbell write is lost */
		for (i = 0; i < MAX_REARM_RETRY; i++) {
		v = RREG32_NO_KIQ(reg_rptr);
		if ((v < ih->ring_size) && (v != ih->rptr))
		WDOORBELL32(ih->doorbell_index, ih->rptr);
		else
		break;
		}
		}

		/**
		* navi10_ih_set_rptr - set the IH ring buffer rptr
		*
		@@ -297,6 +330,9 @@ static void navi10_ih_set_rptr(struct amdgpu_device *adev,
		/* XXX check if swapping is necessary on BE */
		*ih->rptr_cpu = ih->rptr;
		WDOORBELL32(ih->doorbell_index, ih->rptr);

		if (amdgpu_sriov_vf(adev))
		navi10_ih_irq_rearm(adev, ih);
		} else
		WREG32_SOC15(OSSSYS, 0, mmIH_RB_RPTR, ih->rptr);
		}