From patchwork Mon Mar 14 18:20:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 12780653 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4650EC4332F for ; Mon, 14 Mar 2022 18:19:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 48DE010E2BA; Mon, 14 Mar 2022 18:19:40 +0000 (UTC) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8416E10E28F; Mon, 14 Mar 2022 18:19:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647281978; x=1678817978; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=2wZzYu9+5Si69IzfdcbsvqaTT6swcWhgewUnWoJv4DA=; b=gEAHGvFTKvza49ZbNoeDneGW0e8DiYimYDcPdTsVxPCYCwcooRHeTdtb feoxRA+wOU8x5HvVL3h3S9T+1oY4XDaR8P/1FcqKZcKs6plhaYvm9vgt3 bFZypemKGAft2MLD/NU5RSWDLemhKfgHZDSg2LYSyWUrvgU07Wxy8kaGl oC859fWO3Cahug4OsMOuYFrkQEVWHueoggPRBkjtgyYLPrtG797hNO9OE xGbXn4mV9xIVm0C6d9u/vM/NVODtWoBEvL7lphz6y3t/qFXspIhvaR7A6 /fHREKL/hBBt9FdoadAseAbnNwzscL/1bi9zMVgz4rQRKhSdfq/EXycCq A==; X-IronPort-AV: E=McAfee;i="6200,9189,10286"; a="238279107" X-IronPort-AV: E=Sophos;i="5.90,181,1643702400"; d="scan'208";a="238279107" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Mar 2022 11:19:38 -0700 X-IronPort-AV: E=Sophos;i="5.90,181,1643702400"; d="scan'208";a="515549277" Received: from ramaling-i9x.iind.intel.com ([10.203.144.108]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Mar 2022 11:19:35 -0700 From: Ramalingam C To: intel-gfx , dri-devel Subject: [PATCH 1/4] drm/i915/gt: Explicitly clear BB_OFFSET for new contexts Date: Mon, 14 Mar 2022 23:50:02 +0530 Message-Id: <20220314182005.17071-2-ramalingam.c@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220314182005.17071-1-ramalingam.c@intel.com> References: <20220314182005.17071-1-ramalingam.c@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mika Kuoppala , Hellstrom Thomas , Chris Wilson Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Chris Wilson Even though the initial protocontext we load onto HW has the register cleared, by the time we save it into the default image, BB_OFFSET has had the enable bit set. Reclear BB_OFFSET for each new context. Testcase: igt/i915_selftests/gt_lrc Signed-off-by: Chris Wilson Cc: Mika Kuoppala Signed-off-by: Ramalingam C Reviewed-by: Thomas Hellström --- drivers/gpu/drm/i915/gt/intel_engine_regs.h | 1 + drivers/gpu/drm/i915/gt/intel_lrc.c | 17 +++++++++++++++++ drivers/gpu/drm/i915/gt/selftest_lrc.c | 5 +++++ 3 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/intel_engine_regs.h b/drivers/gpu/drm/i915/gt/intel_engine_regs.h index 0bf8b45c9319..d6da3bbf66f8 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_regs.h @@ -109,6 +109,7 @@ #define RING_SBBSTATE(base) _MMIO((base) + 0x118) /* hsw+ */ #define RING_SBBADDR_UDW(base) _MMIO((base) + 0x11c) /* gen8+ */ #define RING_BBADDR(base) _MMIO((base) + 0x140) +#define RING_BB_OFFSET(base) _MMIO((base) + 0x158) #define RING_BBADDR_UDW(base) _MMIO((base) + 0x168) /* gen8+ */ #define CCID(base) _MMIO((base) + 0x180) #define CCID_EN BIT(0) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 07bef7128fdb..f673bae97a03 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -662,6 +662,18 @@ static int lrc_ring_mi_mode(const struct intel_engine_cs *engine) return -1; } +static int lrc_ring_bb_offset(const struct intel_engine_cs *engine) +{ + if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) + return 0x80; + else if (GRAPHICS_VER(engine->i915) >= 12) + return 0x70; + else if (GRAPHICS_VER(engine->i915) >= 9) + return 0x64; + else + return -1; +} + static int lrc_ring_gpr0(const struct intel_engine_cs *engine) { if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) @@ -768,6 +780,7 @@ static void init_common_regs(u32 * const regs, bool inhibit) { u32 ctl; + int loc; ctl = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH); ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); @@ -779,6 +792,10 @@ static void init_common_regs(u32 * const regs, regs[CTX_CONTEXT_CONTROL] = ctl; regs[CTX_TIMESTAMP] = ce->runtime.last; + + loc = lrc_ring_bb_offset(engine); + if (loc != -1) + regs[loc + 1] = 0; } static void init_wa_bb_regs(u32 * const regs, diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index 21c29d315cc0..13f57c7c4224 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -323,6 +323,11 @@ static int live_lrc_fixed(void *arg) lrc_ring_cmd_buf_cctl(engine), "RING_CMD_BUF_CCTL" }, + { + i915_mmio_reg_offset(RING_BB_OFFSET(engine->mmio_base)), + lrc_ring_bb_offset(engine), + "RING_BB_OFFSET" + }, { }, }, *t; u32 *hw;