From: Ben Goz Date: Wed, 17 Dec 2014 12:09:10 +0000 (+0200) Subject: drm/radeon: Assign VMID to PASID for IH in non-HWS mode X-Git-Tag: firefly_0821_release~176^2~2543^2^2~4 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fec77bb50fd0b94cb502cd3745e8b5c4a6e9c404;p=firefly-linux-kernel-4.4.55.git drm/radeon: Assign VMID to PASID for IH in non-HWS mode This patch fixes a bug in kgd_set_pasid_vmid_mapping(), where the function only updated the ATC registers (IOMMU) with the new VMID <--> PASID mapping, but didn't update the IH (Interrupt) registers. The bug only occurs when using non-HWS mode. In HWS mode, the CP automatically does the VMID <--> PASID mapping. Signed-off-by: Ben Goz Signed-off-by: Oded Gabbay Acked-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/cikd.h b/drivers/gpu/drm/radeon/cikd.h index ba85986febea..03003f8a6de6 100644 --- a/drivers/gpu/drm/radeon/cikd.h +++ b/drivers/gpu/drm/radeon/cikd.h @@ -2156,4 +2156,6 @@ #define ATC_VM_APERTURE1_HIGH_ADDR 0x330Cu #define ATC_VM_APERTURE1_LOW_ADDR 0x3304u +#define IH_VMID_0_LUT 0x3D40u + #endif diff --git a/drivers/gpu/drm/radeon/radeon_kfd.c b/drivers/gpu/drm/radeon/radeon_kfd.c index a55afbadc65f..8bf87f1203cc 100644 --- a/drivers/gpu/drm/radeon/radeon_kfd.c +++ b/drivers/gpu/drm/radeon/radeon_kfd.c @@ -390,6 +390,10 @@ static int kgd_set_pasid_vmid_mapping(struct kgd_dev *kgd, unsigned int pasid, cpu_relax(); write_register(kgd, ATC_VMID_PASID_MAPPING_UPDATE_STATUS, 1U << vmid); + /* Mapping vmid to pasid also for IH block */ + write_register(kgd, IH_VMID_0_LUT + vmid * sizeof(uint32_t), + pasid_mapping); + return 0; }