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drm/panfrost: Add cache/TLB flush before switching address space

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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: 7282f7645d ("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
This commit is contained in:
Rob Herring 2019-08-26 17:33:15 -05:00
parent 86df65f39b
commit 5924d40958
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/panfrost/panfrost_mmu.c
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@ -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);