From patchwork Tue Feb 1 10:41:24 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ramalingam C X-Patchwork-Id: 12731546 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 B974CC433FE for ; Tue, 1 Feb 2022 10:42:27 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id E354310EBF7; Tue, 1 Feb 2022 10:42:07 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id D089010EC05; Tue, 1 Feb 2022 10:42:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643712124; x=1675248124; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PlrjSypRxZ548k4SP0ekudu1X4dlIQEvgQtB2LE6+7Q=; b=YuU8Mxihy6wgjHVQzx7fSsxAiVQv6yc6QEREV8Bq089y66hJMJs9Xo8R jgg4l2a9s2pQ4AiD25km09VSVqt2JDBBTfdcPo03s6a/vd8om0ujn4kb0 CbxL/pCbPmWxRVOdfzNe+RjXUT0M0dwBi7px7zSfl8Oxmw2UrtOSLFEhw 6rfS+v6NwNBzDP3ab+z/rx4ub7EooIj7Fh4rKFppmm3GJNIwlw0osyu2N zn4jHoJw3awxQuvnyCbDdKjTWIHbNcGjXikTgXcQPFDMCvgX7M+Y9MXYG OmSZeZJtGbMTufZYyhv+LHT4Ortb30KXV7VHgoOtuzEAPbnrIDsceG4Qp g==; X-IronPort-AV: E=McAfee;i="6200,9189,10244"; a="334020626" X-IronPort-AV: E=Sophos;i="5.88,333,1635231600"; d="scan'208";a="334020626" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2022 02:42:04 -0800 X-IronPort-AV: E=Sophos;i="5.88,333,1635231600"; d="scan'208";a="523011252" Received: from ramaling-i9x.iind.intel.com ([10.203.144.108]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Feb 2022 02:42:02 -0800 From: Ramalingam C To: dri-devel , intel-gfx Subject: [PATCH v5 11/19] drm/i915/lmem: Enable lmem for platforms with Flat CCS Date: Tue, 1 Feb 2022 16:11:24 +0530 Message-Id: <20220201104132.3050-12-ramalingam.c@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220201104132.3050-1-ramalingam.c@intel.com> References: <20220201104132.3050-1-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: Abdiel Janulgue , Matthew Auld , Lionel Landwerlin Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Abdiel Janulgue A portion of device memory is reserved for Flat CCS so usable device memory will be reduced by size of Flat CCS. Size of Flat CCS is specified in “XEHPSDV_FLAT_CCS_BASE_ADDR”. So to get effective device memory we need to subtract total device memory by Flat CCS memory size. v2: Addressed the small bar related issue [Matt] Removed a reduntant check [Matt] Cc: Matthew Auld Signed-off-by: Abdiel Janulgue Signed-off-by: Ramalingam C Reviewed-by: Lucas De Marchi --- drivers/gpu/drm/i915/gt/intel_gt.c | 19 ++++++++++++++++ drivers/gpu/drm/i915/gt/intel_gt.h | 1 + drivers/gpu/drm/i915/gt/intel_region_lmem.c | 24 +++++++++++++++++++-- drivers/gpu/drm/i915/i915_reg.h | 3 +++ 4 files changed, 45 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt.c b/drivers/gpu/drm/i915/gt/intel_gt.c index f59933abbb3a..e40d98cb3a2d 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.c +++ b/drivers/gpu/drm/i915/gt/intel_gt.c @@ -911,6 +911,25 @@ u32 intel_gt_read_register_fw(struct intel_gt *gt, i915_reg_t reg) return intel_uncore_read_fw(gt->uncore, reg); } +u32 intel_gt_read_register(struct intel_gt *gt, i915_reg_t reg) +{ + int type; + u8 sliceid, subsliceid; + + for (type = 0; type < NUM_STEERING_TYPES; type++) { + if (intel_gt_reg_needs_read_steering(gt, reg, type)) { + intel_gt_get_valid_steering(gt, type, &sliceid, + &subsliceid); + return intel_uncore_read_with_mcr_steering(gt->uncore, + reg, + sliceid, + subsliceid); + } + } + + return intel_uncore_read(gt->uncore, reg); +} + void intel_gt_info_print(const struct intel_gt_info *info, struct drm_printer *p) { diff --git a/drivers/gpu/drm/i915/gt/intel_gt.h b/drivers/gpu/drm/i915/gt/intel_gt.h index 2dad46c3eff2..0f571c8ee22b 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt.h +++ b/drivers/gpu/drm/i915/gt/intel_gt.h @@ -85,6 +85,7 @@ static inline bool intel_gt_needs_read_steering(struct intel_gt *gt, } u32 intel_gt_read_register_fw(struct intel_gt *gt, i915_reg_t reg); +u32 intel_gt_read_register(struct intel_gt *gt, i915_reg_t reg); void intel_gt_info_print(const struct intel_gt_info *info, struct drm_printer *p); diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c index 21215a080088..f1d37b46b505 100644 --- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c +++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c @@ -205,8 +205,28 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt) if (!IS_DGFX(i915)) return ERR_PTR(-ENODEV); - /* Stolen starts from GSMBASE on DG1 */ - lmem_size = intel_uncore_read64(uncore, GEN12_GSMBASE); + if (HAS_FLAT_CCS(i915)) { + u64 tile_stolen, flat_ccs_base_addr_reg, flat_ccs_base; + + lmem_size = pci_resource_len(pdev, 2); + flat_ccs_base_addr_reg = intel_gt_read_register(gt, XEHPSDV_FLAT_CCS_BASE_ADDR); + flat_ccs_base = (flat_ccs_base_addr_reg >> XEHPSDV_CCS_BASE_SHIFT) * SZ_64K; + + if (GEM_WARN_ON(lmem_size < flat_ccs_base)) + return ERR_PTR(-ENODEV); + + tile_stolen = lmem_size - flat_ccs_base; + + /* If the FLAT_CCS_BASE_ADDR register is not populated, flag an error */ + if (tile_stolen == lmem_size) + DRM_ERROR("CCS_BASE_ADDR register did not have expected value\n"); + + lmem_size -= tile_stolen; + } else { + /* Stolen starts from GSMBASE without CCS */ + lmem_size = intel_uncore_read64(&i915->uncore, GEN12_GSMBASE); + } + io_start = pci_resource_start(pdev, 2); if (GEM_WARN_ON(lmem_size > pci_resource_len(pdev, 2))) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 0f36af8dc3a1..9b5423572fe9 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -11651,6 +11651,9 @@ enum skl_power_gate { #define SGGI_DIS REG_BIT(15) #define SGR_DIS REG_BIT(13) +#define XEHPSDV_FLAT_CCS_BASE_ADDR _MMIO(0x4910) +#define XEHPSDV_CCS_BASE_SHIFT 8 + /* gamt regs */ #define GEN8_L3_LRA_1_GPGPU _MMIO(0x4dd4) #define GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW 0x67F1427F /* max/min for LRA1/2 */