From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Daniel Subject: [PATCH 29/43] drm/i915/bdw: Write the tail pointer, LRC style Date: Thu, 24 Jul 2014 17:04:37 +0100 Message-ID: <1406217891-8912-30-git-send-email-thomas.daniel@intel.com> References: <1406217891-8912-1-git-send-email-thomas.daniel@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mga03.intel.com (mga03.intel.com [143.182.124.21]) by gabe.freedesktop.org (Postfix) with ESMTP id 578E06E72D for ; Thu, 24 Jul 2014 09:05:22 -0700 (PDT) In-Reply-To: <1406217891-8912-1-git-send-email-thomas.daniel@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" To: intel-gfx@lists.freedesktop.org List-Id: intel-gfx@lists.freedesktop.org From: Oscar Mateo Each logical ring context has the tail pointer in the context object, so update it before submission. v2: New namespace. Signed-off-by: Oscar Mateo --- drivers/gpu/drm/i915/intel_lrc.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 535ef98..5b6f416 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -176,6 +176,21 @@ static void execlists_elsp_write(struct intel_engine_cs *ring, gen6_gt_force_wake_put(dev_priv, FORCEWAKE_ALL); } +static int execlists_ctx_write_tail(struct drm_i915_gem_object *ctx_obj, u32 tail) +{ + struct page *page; + uint32_t *reg_state; + + page = i915_gem_object_get_page(ctx_obj, 1); + reg_state = kmap_atomic(page); + + reg_state[CTX_RING_TAIL+1] = tail; + + kunmap_atomic(reg_state); + + return 0; +} + static int execlists_submit_context(struct intel_engine_cs *ring, struct intel_context *to0, u32 tail0, struct intel_context *to1, u32 tail1) @@ -187,10 +202,14 @@ static int execlists_submit_context(struct intel_engine_cs *ring, BUG_ON(!ctx_obj0); BUG_ON(!i915_gem_obj_is_pinned(ctx_obj0)); + execlists_ctx_write_tail(ctx_obj0, tail0); + if (to1) { ctx_obj1 = to1->engine[ring->id].state; BUG_ON(!ctx_obj1); BUG_ON(!i915_gem_obj_is_pinned(ctx_obj1)); + + execlists_ctx_write_tail(ctx_obj1, tail1); } execlists_elsp_write(ring, ctx_obj0, ctx_obj1); -- 1.7.9.5