From patchwork Fri Mar 2 16:14:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mika Kuoppala X-Patchwork-Id: 10255093 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 40CDD6037F for ; Fri, 2 Mar 2018 16:15:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 301C428997 for ; Fri, 2 Mar 2018 16:15:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 24CC4289D5; Fri, 2 Mar 2018 16:15:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 73CEF289CF for ; Fri, 2 Mar 2018 16:15:09 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id ED8356E1B0; Fri, 2 Mar 2018 16:15:08 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id 665D16E1B5 for ; Fri, 2 Mar 2018 16:15:08 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Mar 2018 08:15:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,412,1515484800"; d="scan'208";a="35008653" Received: from rosetta.fi.intel.com ([10.237.72.186]) by fmsmga001.fm.intel.com with ESMTP; 02 Mar 2018 08:15:04 -0800 Received: by rosetta.fi.intel.com (Postfix, from userid 1000) id 256C9840069; Fri, 2 Mar 2018 18:15:02 +0200 (EET) From: Mika Kuoppala To: intel-gfx@lists.freedesktop.org Date: Fri, 2 Mar 2018 18:14:59 +0200 Message-Id: <20180302161501.28594-4-mika.kuoppala@linux.intel.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20180302161501.28594-1-mika.kuoppala@linux.intel.com> References: <20180302161501.28594-1-mika.kuoppala@linux.intel.com> Subject: [Intel-gfx] [PATCH 4/6] drm/i915/icl: Enhanced execution list support X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Daniel , Rodrigo Vivi MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Thomas Daniel Enhanced Execlists is an upgraded version of execlists which supports up to 8 ports. The lrcs to be submitted are written to a submit queue (the ExecLists Submission Queue - ELSQ), which is then loaded on the HW. When writing to the ELSP register, the lrcs are written cyclically in the queue from position 0 to position 7. Alternatively, it is possible to write directly in the individual positions of the queue using the ELSQC registers. To be able to re-use all the existing code we're using the latter method and we're currently limiting ourself to only using 2 elements. v2: Rebase. v3: Switch from !IS_GEN11 to GEN < 11 (Daniele Ceraolo Spurio). v4: Use the elsq registers instead of elsp. (Daniele Ceraolo Spurio) v5: Reword commit, rename regs to be closer to specs, turn off preemption (Daniele), reuse engine->execlists.elsp (Chris) v6: use has_logical_ring_elsq to differentiate the new paths v7: add preemption support, rename els to submit_reg (Chris) v8: save the ctrl register inside the execlists struct, drop CSB handling updates (superseded by preempt_complete_status) (Chris) v9: s/drm_i915_gem_request/i915_request (Mika) v10: resolved conflict in inject_preempt_context (Mika) Cc: Chris Wilson Cc: Mika Kuoppala Signed-off-by: Thomas Daniel Signed-off-by: Rodrigo Vivi Signed-off-by: Daniele Ceraolo Spurio Reviewed-by: Chris Wilson (v8) Signed-off-by: Mika Kuoppala Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/i915_drv.h | 2 ++ drivers/gpu/drm/i915/i915_pci.c | 3 +- drivers/gpu/drm/i915/intel_device_info.h | 1 + drivers/gpu/drm/i915/intel_lrc.c | 58 ++++++++++++++++++++++++-------- drivers/gpu/drm/i915/intel_lrc.h | 3 ++ drivers/gpu/drm/i915/intel_ringbuffer.h | 12 +++++-- 6 files changed, 62 insertions(+), 17 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 8e2e6585549d..2b52592b193e 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2772,6 +2772,8 @@ intel_info(const struct drm_i915_private *dev_priv) #define HAS_LOGICAL_RING_CONTEXTS(dev_priv) \ ((dev_priv)->info.has_logical_ring_contexts) +#define HAS_LOGICAL_RING_ELSQ(dev_priv) \ + ((dev_priv)->info.has_logical_ring_elsq) #define HAS_LOGICAL_RING_PREEMPTION(dev_priv) \ ((dev_priv)->info.has_logical_ring_preemption) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 26e8f5c13231..062e91b39085 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -594,7 +594,8 @@ static const struct intel_device_info intel_cannonlake_info = { GEN10_FEATURES, \ GEN(11), \ .ddb_size = 2048, \ - .has_csr = 0 + .has_csr = 0, \ + .has_logical_ring_elsq = 1 static const struct intel_device_info intel_icelake_11_info = { GEN11_FEATURES, diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index ab5bfd305477..7cc5a8e649b5 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -96,6 +96,7 @@ enum intel_platform { func(has_l3_dpf); \ func(has_llc); \ func(has_logical_ring_contexts); \ + func(has_logical_ring_elsq); \ func(has_logical_ring_preemption); \ func(has_overlay); \ func(has_pooled_eu); \ diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index e50d86af1345..ea88e74ba8ac 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -417,18 +417,30 @@ static u64 execlists_update_context(struct i915_request *rq) return ce->lrc_desc; } -static inline void elsp_write(u64 desc, u32 __iomem *elsp) +static inline void write_desc(struct intel_engine_execlists *execlists, u64 desc, u32 port) { - writel(upper_32_bits(desc), elsp); - writel(lower_32_bits(desc), elsp); + if (execlists->ctrl_reg) { + writel(lower_32_bits(desc), execlists->submit_reg + port * 2); + writel(upper_32_bits(desc), execlists->submit_reg + port * 2 + 1); + } else { + writel(upper_32_bits(desc), execlists->submit_reg); + writel(lower_32_bits(desc), execlists->submit_reg); + } } static void execlists_submit_ports(struct intel_engine_cs *engine) { - struct execlist_port *port = engine->execlists.port; + struct intel_engine_execlists *execlists = &engine->execlists; + struct execlist_port *port = execlists->port; unsigned int n; - for (n = execlists_num_ports(&engine->execlists); n--; ) { + /* + * ELSQ note: the submit queue is not cleared after being submitted + * to the HW so we need to make sure we always clean it up. This is + * currently ensured by the fact that we always write the same number + * of elsq entries, keep this in mind before changing the loop below. + */ + for (n = execlists_num_ports(execlists); n--; ) { struct i915_request *rq; unsigned int count; u64 desc; @@ -452,9 +464,14 @@ static void execlists_submit_ports(struct intel_engine_cs *engine) desc = 0; } - elsp_write(desc, engine->execlists.elsp); + write_desc(execlists, desc, n); } - execlists_clear_active(&engine->execlists, EXECLISTS_ACTIVE_HWACK); + + /* we need to manually load the submit queue */ + if (execlists->ctrl_reg) + writel(EL_CTRL_LOAD, execlists->ctrl_reg); + + execlists_clear_active(execlists, EXECLISTS_ACTIVE_HWACK); } static bool ctx_single_port_submission(const struct i915_gem_context *ctx) @@ -487,11 +504,12 @@ static void port_assign(struct execlist_port *port, struct i915_request *rq) static void inject_preempt_context(struct intel_engine_cs *engine) { + struct intel_engine_execlists *execlists = &engine->execlists; struct intel_context *ce = &engine->i915->preempt_context->engine[engine->id]; unsigned int n; - GEM_BUG_ON(engine->execlists.preempt_complete_status != + GEM_BUG_ON(execlists->preempt_complete_status != upper_32_bits(ce->lrc_desc)); GEM_BUG_ON((ce->lrc_reg_state[CTX_CONTEXT_CONTROL + 1] & _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT | @@ -504,10 +522,15 @@ static void inject_preempt_context(struct intel_engine_cs *engine) * the state of the GPU is known (idle). */ GEM_TRACE("%s\n", engine->name); - for (n = execlists_num_ports(&engine->execlists); --n; ) - elsp_write(0, engine->execlists.elsp); + for (n = execlists_num_ports(execlists); --n; ) + write_desc(execlists, 0, n); + + write_desc(execlists, ce->lrc_desc, n); + + /* we need to manually load the submit queue */ + if (execlists->ctrl_reg) + writel(EL_CTRL_LOAD, execlists->ctrl_reg); - elsp_write(ce->lrc_desc, engine->execlists.elsp); execlists_clear_active(&engine->execlists, EXECLISTS_ACTIVE_HWACK); execlists_set_active(&engine->execlists, EXECLISTS_ACTIVE_PREEMPT); } @@ -2103,8 +2126,15 @@ static int logical_ring_init(struct intel_engine_cs *engine) if (ret) goto error; - engine->execlists.elsp = - engine->i915->regs + i915_mmio_reg_offset(RING_ELSP(engine)); + if (HAS_LOGICAL_RING_ELSQ(engine->i915)) { + engine->execlists.submit_reg = engine->i915->regs + + i915_mmio_reg_offset(RING_EXECLIST_SQ_CONTENTS(engine)); + engine->execlists.ctrl_reg = engine->i915->regs + + i915_mmio_reg_offset(RING_EXECLIST_CONTROL(engine)); + } else { + engine->execlists.submit_reg = engine->i915->regs + + i915_mmio_reg_offset(RING_ELSP(engine)); + } engine->execlists.preempt_complete_status = ~0u; if (engine->i915->preempt_context) @@ -2373,7 +2403,7 @@ populate_lr_context(struct i915_gem_context *ctx, if (!engine->default_state) regs[CTX_CONTEXT_CONTROL + 1] |= _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); - if (ctx == ctx->i915->preempt_context) + if (ctx == ctx->i915->preempt_context && INTEL_GEN(engine->i915) < 11) regs[CTX_CONTEXT_CONTROL + 1] |= _MASKED_BIT_ENABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT | CTX_CTRL_ENGINE_CTX_SAVE_INHIBIT); diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h index 636ced41225d..59d7b86012e9 100644 --- a/drivers/gpu/drm/i915/intel_lrc.h +++ b/drivers/gpu/drm/i915/intel_lrc.h @@ -42,6 +42,9 @@ #define RING_CONTEXT_STATUS_BUF_LO(engine, i) _MMIO((engine)->mmio_base + 0x370 + (i) * 8) #define RING_CONTEXT_STATUS_BUF_HI(engine, i) _MMIO((engine)->mmio_base + 0x370 + (i) * 8 + 4) #define RING_CONTEXT_STATUS_PTR(engine) _MMIO((engine)->mmio_base + 0x3a0) +#define RING_EXECLIST_SQ_CONTENTS(engine) _MMIO((engine)->mmio_base + 0x510) +#define RING_EXECLIST_CONTROL(engine) _MMIO((engine)->mmio_base + 0x550) +#define EL_CTRL_LOAD (1 << 0) /* The docs specify that the write pointer wraps around after 5h, "After status * is written out to the last available status QW at offset 5h, this pointer diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index 90e4380cbdd5..24d1501cbc67 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -209,9 +209,17 @@ struct intel_engine_execlists { bool no_priolist; /** - * @elsp: the ExecList Submission Port register + * @submit_reg: gen-specific execlist submission register + * set to the ExecList Submission Port (elsp) register pre-Gen11 and to + * the ExecList Submission Queue Contents register array for Gen11+ */ - u32 __iomem *elsp; + u32 __iomem *submit_reg; + + /** + * @ctrl_reg: the enhanced execlists control register, used to load the + * submit queue on the HW and to request preemptions to idle + */ + u32 __iomem *ctrl_reg; /** * @port: execlist port states