From 16dc224f1c0ff8d242ef41c40d4da0264d351daa Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 9 May 2020 11:50:21 +0100 Subject: drm/i915: Replace the hardcoded I915_FENCE_TIMEOUT Expose the hardcoded timeout for unsignaled foreign fences as a Kconfig option, primarily to allow brave systems to disable the timeout and solely rely on correct signaling. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Acked-by: Michael J. Ruhl Link: https://patchwork.freedesktop.org/patch/msgid/20200509105021.12542-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/Kconfig.profile | 12 ++++++++++++ drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/display/intel_display.c | 5 +++-- drivers/gpu/drm/i915/gem/i915_gem_clflush.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_client_blt.c | 3 +-- drivers/gpu/drm/i915/gem/i915_gem_fence.c | 4 ++-- drivers/gpu/drm/i915/i915_config.c | 15 +++++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 10 +++++++++- drivers/gpu/drm/i915/i915_request.c | 3 ++- 9 files changed, 46 insertions(+), 9 deletions(-) create mode 100644 drivers/gpu/drm/i915/i915_config.c diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile index 0bfd276c19fe..35bbe2b80596 100644 --- a/drivers/gpu/drm/i915/Kconfig.profile +++ b/drivers/gpu/drm/i915/Kconfig.profile @@ -1,3 +1,15 @@ +config DRM_I915_FENCE_TIMEOUT + int "Timeout for unsignaled foreign fences (ms, jiffy granularity)" + default 10000 # milliseconds + help + When listening to a foreign fence, we install a supplementary timer + to ensure that we are always signaled and our userspace is able to + make forward progress. This value specifies the timeout used for an + unsignaled foreign fence. + + May be 0 to disable the timeout, and rely on the foreign fence being + eventually signaled. + config DRM_I915_USERFAULT_AUTOSUSPEND int "Runtime autosuspend delay for userspace GGTT mmaps (ms)" default 250 # milliseconds diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 5359c736c789..b0da6ea6e3f1 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -35,6 +35,7 @@ subdir-ccflags-y += -I$(srctree)/$(src) # core driver code i915-y += i915_drv.o \ + i915_config.o \ i915_irq.o \ i915_getparam.o \ i915_params.o \ diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 268d65e23472..fb41f36c0256 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -15815,7 +15815,7 @@ intel_prepare_plane_fb(struct drm_plane *_plane, if (new_plane_state->uapi.fence) { /* explicit fencing */ ret = i915_sw_fence_await_dma_fence(&state->commit_ready, new_plane_state->uapi.fence, - I915_FENCE_TIMEOUT, + i915_fence_timeout(dev_priv), GFP_KERNEL); if (ret < 0) return ret; @@ -15842,7 +15842,8 @@ intel_prepare_plane_fb(struct drm_plane *_plane, ret = i915_sw_fence_await_reservation(&state->commit_ready, obj->base.resv, NULL, - false, I915_FENCE_TIMEOUT, + false, + i915_fence_timeout(dev_priv), GFP_KERNEL); if (ret < 0) goto unpin_fb; diff --git a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c index 34be4c0ee7c5..bc0223716906 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_clflush.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_clflush.c @@ -108,7 +108,7 @@ bool i915_gem_clflush_object(struct drm_i915_gem_object *obj, if (clflush) { i915_sw_fence_await_reservation(&clflush->base.chain, obj->base.resv, NULL, true, - I915_FENCE_TIMEOUT, + i915_fence_timeout(to_i915(obj->base.dev)), I915_FENCE_GFP); dma_resv_add_excl_fence(obj->base.resv, &clflush->base.dma); dma_fence_work_commit(&clflush->base); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c index 3a146aa2593b..d3a86a4d5c04 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_client_blt.c @@ -288,8 +288,7 @@ int i915_gem_schedule_fill_pages_blt(struct drm_i915_gem_object *obj, i915_gem_object_lock(obj); err = i915_sw_fence_await_reservation(&work->wait, - obj->base.resv, NULL, - true, I915_FENCE_TIMEOUT, + obj->base.resv, NULL, true, 0, I915_FENCE_GFP); if (err < 0) { dma_fence_set_error(&work->dma, err); diff --git a/drivers/gpu/drm/i915/gem/i915_gem_fence.c b/drivers/gpu/drm/i915/gem/i915_gem_fence.c index 2f6100ec2608..8ab842c80f99 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_fence.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_fence.c @@ -72,8 +72,8 @@ i915_gem_object_lock_fence(struct drm_i915_gem_object *obj) 0, 0); if (i915_sw_fence_await_reservation(&stub->chain, - obj->base.resv, NULL, - true, I915_FENCE_TIMEOUT, + obj->base.resv, NULL, true, + i915_fence_timeout(to_i915(obj->base.dev)), I915_FENCE_GFP) < 0) goto err; diff --git a/drivers/gpu/drm/i915/i915_config.c b/drivers/gpu/drm/i915/i915_config.c new file mode 100644 index 000000000000..b79b5f6d2cfa --- /dev/null +++ b/drivers/gpu/drm/i915/i915_config.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2020 Intel Corporation + */ + +#include "i915_drv.h" + +unsigned long +i915_fence_context_timeout(const struct drm_i915_private *i915, u64 context) +{ + if (context && IS_ACTIVE(CONFIG_DRM_I915_FENCE_TIMEOUT)) + return msecs_to_jiffies_timeout(CONFIG_DRM_I915_FENCE_TIMEOUT); + + return 0; +} diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 7af48641dbc9..99d8b103057f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -614,8 +614,16 @@ struct i915_gem_mm { #define I915_IDLE_ENGINES_TIMEOUT (200) /* in ms */ +unsigned long i915_fence_context_timeout(const struct drm_i915_private *i915, + u64 context); + +static inline unsigned long +i915_fence_timeout(const struct drm_i915_private *i915) +{ + return i915_fence_context_timeout(i915, U64_MAX); +} + #define I915_RESET_TIMEOUT (10 * HZ) /* 10s */ -#define I915_FENCE_TIMEOUT (10 * HZ) /* 10s */ #define I915_ENGINE_DEAD_TIMEOUT (4 * HZ) /* Seqno, head and subunits dead */ #define I915_SEQNO_DEAD_TIMEOUT (12 * HZ) /* Seqno dead with active head */ diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c index 2c0de3a3b8e8..2d5b98549ddc 100644 --- a/drivers/gpu/drm/i915/i915_request.c +++ b/drivers/gpu/drm/i915/i915_request.c @@ -1098,7 +1098,8 @@ __i915_request_await_external(struct i915_request *rq, struct dma_fence *fence) { mark_external(rq); return i915_sw_fence_await_dma_fence(&rq->submit, fence, - fence->context ? I915_FENCE_TIMEOUT : 0, + i915_fence_context_timeout(rq->i915, + fence->context), I915_FENCE_GFP); } -- cgit v1.2.3