From 57692c94dcbe99a1e0444409a3da13fb3443562c Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Mon, 30 Apr 2018 11:10:58 -0700 Subject: drm/v3d: Introduce a new DRM driver for Broadcom V3D V3.x+ This driver will be used to support Mesa on the Broadcom 7268 and 7278 platforms. V3D 3.3 introduces an MMU, which means we no longer need CMA or vc4's complicated CL/shader validation scheme. This massively changes the GEM behavior, so I've forked off to a new driver. v2: Mark SUBMIT_CL as needing DRM_AUTH. coccinelle fixes from kbuild test robot. Drop personal git link from MAINTAINERS. Don't double-map dma-buf imported BOs. Add kerneldoc about needing MMU eviction. Drop prime vmap/unmap stubs. Delay mmap offset setup to mmap time. Use drm_dev_init instead of _alloc. Use ktime_get() for wait_bo timeouts. Drop drm_can_sleep() usage, since we don't modeset. Switch page tables back to WC (debug change to coherent had slipped in). Switch drm_gem_object_unreference_unlocked() to drm_gem_object_put_unlocked(). Simplify overflow mem handling by not sharing overflow mem between jobs. v3: no changes v4: align submit_cl to 64 bits (review by airlied), check zero flags in other ioctls. Signed-off-by: Eric Anholt Acked-by: Daniel Vetter (v4) Acked-by: Dave Airlie (v3, requested submit_cl change) Link: https://patchwork.freedesktop.org/patch/msgid/20180430181058.30181-3-eric@anholt.net --- drivers/gpu/drm/v3d/v3d_fence.c | 58 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 drivers/gpu/drm/v3d/v3d_fence.c (limited to 'drivers/gpu/drm/v3d/v3d_fence.c') diff --git a/drivers/gpu/drm/v3d/v3d_fence.c b/drivers/gpu/drm/v3d/v3d_fence.c new file mode 100644 index 000000000000..087d49c8cb12 --- /dev/null +++ b/drivers/gpu/drm/v3d/v3d_fence.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (C) 2017-2018 Broadcom */ + +#include "v3d_drv.h" + +struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue queue) +{ + struct v3d_fence *fence; + + fence = kzalloc(sizeof(*fence), GFP_KERNEL); + if (!fence) + return ERR_PTR(-ENOMEM); + + fence->dev = &v3d->drm; + fence->queue = queue; + fence->seqno = ++v3d->queue[queue].emit_seqno; + dma_fence_init(&fence->base, &v3d_fence_ops, &v3d->job_lock, + v3d->queue[queue].fence_context, fence->seqno); + + return &fence->base; +} + +static const char *v3d_fence_get_driver_name(struct dma_fence *fence) +{ + return "v3d"; +} + +static const char *v3d_fence_get_timeline_name(struct dma_fence *fence) +{ + struct v3d_fence *f = to_v3d_fence(fence); + + if (f->queue == V3D_BIN) + return "v3d-bin"; + else + return "v3d-render"; +} + +static bool v3d_fence_enable_signaling(struct dma_fence *fence) +{ + return true; +} + +static bool v3d_fence_signaled(struct dma_fence *fence) +{ + struct v3d_fence *f = to_v3d_fence(fence); + struct v3d_dev *v3d = to_v3d_dev(f->dev); + + return v3d->queue[f->queue].finished_seqno >= f->seqno; +} + +const struct dma_fence_ops v3d_fence_ops = { + .get_driver_name = v3d_fence_get_driver_name, + .get_timeline_name = v3d_fence_get_timeline_name, + .enable_signaling = v3d_fence_enable_signaling, + .signaled = v3d_fence_signaled, + .wait = dma_fence_default_wait, + .release = dma_fence_free, +}; -- cgit From 14d1d190869685d3a1e8a3f63924e20594557cb2 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 5 Jun 2018 12:03:01 -0700 Subject: drm/v3d: Remove the bad signaled() implementation. Since our seqno value comes from a counter associated with the GPU ring, not the entity (aka client), they'll be completed out of order. There's actually no need for this code at all, since we don't have enable_signaling() and thus DMA_FENCE_SIGNALED_BIT will be set before we could be called. Signed-off-by: Eric Anholt Link: https://patchwork.freedesktop.org/patch/msgid/20180605190302.18279-2-eric@anholt.net Reviewed-by: Lucas Stach --- drivers/gpu/drm/v3d/v3d_drv.h | 1 - drivers/gpu/drm/v3d/v3d_fence.c | 13 ++++--------- drivers/gpu/drm/v3d/v3d_gem.c | 7 ++----- drivers/gpu/drm/v3d/v3d_irq.c | 3 --- 4 files changed, 6 insertions(+), 18 deletions(-) (limited to 'drivers/gpu/drm/v3d/v3d_fence.c') diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h index 26005abd9c5d..f32ac8c98f37 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.h +++ b/drivers/gpu/drm/v3d/v3d_drv.h @@ -25,7 +25,6 @@ struct v3d_queue_state { u64 fence_context; u64 emit_seqno; - u64 finished_seqno; }; struct v3d_dev { diff --git a/drivers/gpu/drm/v3d/v3d_fence.c b/drivers/gpu/drm/v3d/v3d_fence.c index 087d49c8cb12..bfe31a89668b 100644 --- a/drivers/gpu/drm/v3d/v3d_fence.c +++ b/drivers/gpu/drm/v3d/v3d_fence.c @@ -40,19 +40,14 @@ static bool v3d_fence_enable_signaling(struct dma_fence *fence) return true; } -static bool v3d_fence_signaled(struct dma_fence *fence) -{ - struct v3d_fence *f = to_v3d_fence(fence); - struct v3d_dev *v3d = to_v3d_dev(f->dev); - - return v3d->queue[f->queue].finished_seqno >= f->seqno; -} - const struct dma_fence_ops v3d_fence_ops = { .get_driver_name = v3d_fence_get_driver_name, .get_timeline_name = v3d_fence_get_timeline_name, .enable_signaling = v3d_fence_enable_signaling, - .signaled = v3d_fence_signaled, + /* Each of our fences gets signaled as complete by the IRQ + * handler, so we rely on the core's tracking of signaling. + */ + .signaled = NULL, .wait = dma_fence_default_wait, .release = dma_fence_free, }; diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c index 269fe16379c0..e1fcbb4cd0ae 100644 --- a/drivers/gpu/drm/v3d/v3d_gem.c +++ b/drivers/gpu/drm/v3d/v3d_gem.c @@ -654,17 +654,14 @@ void v3d_gem_destroy(struct drm_device *dev) { struct v3d_dev *v3d = to_v3d_dev(dev); - enum v3d_queue q; v3d_sched_fini(v3d); /* Waiting for exec to finish would need to be done before * unregistering V3D. */ - for (q = 0; q < V3D_MAX_QUEUES; q++) { - WARN_ON(v3d->queue[q].emit_seqno != - v3d->queue[q].finished_seqno); - } + WARN_ON(v3d->bin_job); + WARN_ON(v3d->render_job); drm_mm_takedown(&v3d->mm); diff --git a/drivers/gpu/drm/v3d/v3d_irq.c b/drivers/gpu/drm/v3d/v3d_irq.c index 77e1fa046c10..e07514eb11b5 100644 --- a/drivers/gpu/drm/v3d/v3d_irq.c +++ b/drivers/gpu/drm/v3d/v3d_irq.c @@ -87,15 +87,12 @@ v3d_irq(int irq, void *arg) } if (intsts & V3D_INT_FLDONE) { - v3d->queue[V3D_BIN].finished_seqno++; dma_fence_signal(v3d->bin_job->bin.done_fence); status = IRQ_HANDLED; } if (intsts & V3D_INT_FRDONE) { - v3d->queue[V3D_RENDER].finished_seqno++; dma_fence_signal(v3d->render_job->render.done_fence); - status = IRQ_HANDLED; } -- cgit From e0d018119ae82cbde32c1d4f8e9b8d8f43a3c88a Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 3 Jul 2018 10:05:13 -0700 Subject: drm/v3d: Remove unnecessary dma_fence_ops. The dma-fence core as of commit 418cc6ca0607 ("dma-fence: Make ->wait callback optional") provides appropriate defaults for these methods. Signed-off-by: Eric Anholt Cc: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180703170515.6298-2-eric@anholt.net Reviewed-by: Alex Deucher Acked-by: Daniel Vetter --- drivers/gpu/drm/v3d/v3d_fence.c | 12 ------------ 1 file changed, 12 deletions(-) (limited to 'drivers/gpu/drm/v3d/v3d_fence.c') diff --git a/drivers/gpu/drm/v3d/v3d_fence.c b/drivers/gpu/drm/v3d/v3d_fence.c index bfe31a89668b..50bfcf9a8a1a 100644 --- a/drivers/gpu/drm/v3d/v3d_fence.c +++ b/drivers/gpu/drm/v3d/v3d_fence.c @@ -35,19 +35,7 @@ static const char *v3d_fence_get_timeline_name(struct dma_fence *fence) return "v3d-render"; } -static bool v3d_fence_enable_signaling(struct dma_fence *fence) -{ - return true; -} - const struct dma_fence_ops v3d_fence_ops = { .get_driver_name = v3d_fence_get_driver_name, .get_timeline_name = v3d_fence_get_timeline_name, - .enable_signaling = v3d_fence_enable_signaling, - /* Each of our fences gets signaled as complete by the IRQ - * handler, so we rely on the core's tracking of signaling. - */ - .signaled = NULL, - .wait = dma_fence_default_wait, - .release = dma_fence_free, }; -- cgit