From e9c4f46e49f236ab29c7d6cc207b240d8875bde4 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Thu, 6 Feb 2020 15:13:27 +0100 Subject: [PATCH] drm/panfrost: perfcnt: Reserve/use the AS attached to the perfcnt MMU context We need to use the AS attached to the opened FD when dumping counters. Reported-by: Antonio Caggiano Fixes: b11e1b24f72f ("drm/panfrost: Implement per FD address spaces") Cc: Signed-off-by: Boris Brezillon Reviewed-by: Steven Price Tested-by: Antonio Caggiano Signed-off-by: Rob Herring Link: https://patchwork.freedesktop.org/patch/msgid/20200206141327.446127-1-boris.brezillon@collabora.com --- drivers/gpu/drm/panfrost/panfrost_mmu.c | 7 ++++++- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 11 ++++------- 2 files changed, 10 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 763cfca886a73..3107b0738e401 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -151,7 +151,12 @@ u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu) as = mmu->as; if (as >= 0) { int en = atomic_inc_return(&mmu->as_count); - WARN_ON(en >= NUM_JOB_SLOTS); + + /* + * AS can be retained by active jobs or a perfcnt context, + * hence the '+ 1' here. + */ + WARN_ON(en >= (NUM_JOB_SLOTS + 1)); list_move(&mmu->list, &pfdev->as_lru_list); goto out; diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index 684820448be31..6913578d5aa72 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -73,7 +73,7 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, struct panfrost_file_priv *user = file_priv->driver_priv; struct panfrost_perfcnt *perfcnt = pfdev->perfcnt; struct drm_gem_shmem_object *bo; - u32 cfg; + u32 cfg, as; int ret; if (user == perfcnt->user) @@ -126,12 +126,8 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, perfcnt->user = user; - /* - * Always use address space 0 for now. - * FIXME: this needs to be updated when we start using different - * address space. - */ - cfg = GPU_PERFCNT_CFG_AS(0) | + as = panfrost_mmu_as_get(pfdev, perfcnt->mapping->mmu); + cfg = GPU_PERFCNT_CFG_AS(as) | GPU_PERFCNT_CFG_MODE(GPU_PERFCNT_CFG_MODE_MANUAL); /* @@ -195,6 +191,7 @@ static int panfrost_perfcnt_disable_locked(struct panfrost_device *pfdev, drm_gem_shmem_vunmap(&perfcnt->mapping->obj->base.base, perfcnt->buf); perfcnt->buf = NULL; panfrost_gem_close(&perfcnt->mapping->obj->base.base, file_priv); + panfrost_mmu_as_put(pfdev, perfcnt->mapping->mmu); panfrost_gem_mapping_put(perfcnt->mapping); perfcnt->mapping = NULL; pm_runtime_mark_last_busy(pfdev->dev); -- 2.39.5