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[91.14.161.181]) by smtp.gmail.com with ESMTPSA id l21sm6122049wmh.31.2021.09.17.05.35.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Sep 2021 05:35:27 -0700 (PDT) From: " =?utf-8?q?Christian_K=C3=B6nig?= " X-Google-Original-From: =?utf-8?q?Christian_K=C3=B6nig?= To: linaro-mm-sig@lists.linaro.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, intel-gfx@lists.freedesktop.org Cc: daniel@ffwll.ch Date: Fri, 17 Sep 2021 14:35:01 +0200 Message-Id: <20210917123513.1106-15-christian.koenig@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210917123513.1106-1-christian.koenig@amd.com> References: <20210917123513.1106-1-christian.koenig@amd.com> MIME-Version: 1.0 X-Mailman-Approved-At: Fri, 17 Sep 2021 13:02:50 +0000 Subject: [Intel-gfx] [PATCH 14/26] drm/i915: use the new iterator in i915_sw_fence_await_reservation v3 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Simplifying the code a bit. v2: use dma_resv_for_each_fence instead, according to Tvrtko the lock is held here anyway. v3: back to using dma_resv_for_each_fence_unlocked. Signed-off-by: Christian König --- drivers/gpu/drm/i915/i915_sw_fence.c | 57 ++++++++-------------------- 1 file changed, 15 insertions(+), 42 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c index c589a681da77..7635b0478ea5 100644 --- a/drivers/gpu/drm/i915/i915_sw_fence.c +++ b/drivers/gpu/drm/i915/i915_sw_fence.c @@ -572,56 +572,29 @@ int i915_sw_fence_await_reservation(struct i915_sw_fence *fence, unsigned long timeout, gfp_t gfp) { - struct dma_fence *excl; + struct dma_resv_iter cursor; + struct dma_fence *f; int ret = 0, pending; debug_fence_assert(fence); might_sleep_if(gfpflags_allow_blocking(gfp)); - if (write) { - struct dma_fence **shared; - unsigned int count, i; - - ret = dma_resv_get_fences(resv, &excl, &count, &shared); - if (ret) - return ret; - - for (i = 0; i < count; i++) { - if (shared[i]->ops == exclude) - continue; - - pending = i915_sw_fence_await_dma_fence(fence, - shared[i], - timeout, - gfp); - if (pending < 0) { - ret = pending; - break; - } - - ret |= pending; - } - - for (i = 0; i < count; i++) - dma_fence_put(shared[i]); - kfree(shared); - } else { - excl = dma_resv_get_excl_unlocked(resv); - } - - if (ret >= 0 && excl && excl->ops != exclude) { - pending = i915_sw_fence_await_dma_fence(fence, - excl, - timeout, + rcu_read_lock(); + dma_resv_iter_begin(&cursor, resv, write); + dma_resv_for_each_fence_unlocked(&cursor, f) { + rcu_read_unlock(); + pending = i915_sw_fence_await_dma_fence(fence, f, timeout, gfp); - if (pending < 0) + rcu_read_lock(); + if (pending < 0) { ret = pending; - else - ret |= pending; - } - - dma_fence_put(excl); + break; + } + ret |= pending; + } + dma_resv_iter_end(&cursor); + rcu_read_unlock(); return ret; }