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authorRob Herring <robh@kernel.org>2019-08-26 17:33:15 -0500
committerRob Herring <robh@kernel.org>2019-08-30 09:53:32 -0500
commit5924d40958dfc2b8996fbf788a9d58e411a6db71 (patch)
tree01413e87f6ac0f151a8592440aa13deeada8f1c2
parent86df65f39b009e00cf2826eac72c5a969b878065 (diff)
drm/panfrost: Add cache/TLB flush before switching address space
It's not entirely clear if this is required, but add a flush of GPU caches and TLBs before we change an address space to new page tables. Fixes: 7282f7645d06 ("drm/panfrost: Implement per FD address spaces") Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Reviewed-by: Robin Murphy <robin.murphy@arm.com> Reviewed-by: Steven Price <steven.price@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190826223317.28509-7-robh@kernel.org
-rw-r--r--drivers/gpu/drm/panfrost/panfrost_mmu.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 3407b00d0a3a..d1ebde3327fe 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -115,6 +115,8 @@ static void panfrost_mmu_enable(struct panfrost_device *pfdev, struct panfrost_m
u64 transtab = cfg->arm_mali_lpae_cfg.transtab;
u64 memattr = cfg->arm_mali_lpae_cfg.memattr;
+ mmu_hw_do_operation_locked(pfdev, as_nr, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
+
mmu_write(pfdev, AS_TRANSTAB_LO(as_nr), transtab & 0xffffffffUL);
mmu_write(pfdev, AS_TRANSTAB_HI(as_nr), transtab >> 32);