From patchwork Tue Sep 13 18:33:37 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Sripada, Radhakrishna" X-Patchwork-Id: 12975132 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 A1BCDECAAD8 for ; Tue, 13 Sep 2022 18:35:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A840A10E1C4; Tue, 13 Sep 2022 18:34:29 +0000 (UTC) Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by gabe.freedesktop.org (Postfix) with ESMTPS id B2DB010E134; Tue, 13 Sep 2022 18:34:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663094058; x=1694630058; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7yYnFOrS4HSHIllQvgQMbGld9BHHnqz8SXGmK/ZIzkQ=; b=Q8Nuq27nLqOYOD0tlMSsmNLTrVMlDQGRYNAbZCwt9eP0Pqi4qKIosU9m j/rKowA06J9OGpMNMxiY4OF/ZU+exPplfOVYVhbmaBFJIF9F4+ubPBqKe mv5vU4M/5kKK5XUVHthpOLwlaPTf7rEA1yKT6GUETqG3f2ddoi+q/B6wT hJs5x2HHeRRRJxGobpxwUll/kKe1JnqPvJfSKDTG2xE8sFD2/q9MjGkSM A9EcfmhrHMfzOvvf8E1IGtnyIbdDBeUV8YKLBUUNx+zslnejFDMoCz+G/ errCNCEsGKP4zpjSoDn010YIbw+PHTPk7CYE4WmCBHyuq1tIlswmrZlBn g==; X-IronPort-AV: E=McAfee;i="6500,9779,10469"; a="281235521" X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="281235521" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 11:34:17 -0700 X-IronPort-AV: E=Sophos;i="5.93,313,1654585200"; d="scan'208";a="647045101" Received: from invictus.jf.intel.com ([10.165.21.134]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Sep 2022 11:34:17 -0700 From: Radhakrishna Sripada To: intel-gfx@lists.freedesktop.org Subject: [PATCH v5 1/5] drm/i915: Read graphics/media/display arch version from hw Date: Tue, 13 Sep 2022 11:33:37 -0700 Message-Id: <20220913183341.908028-2-radhakrishna.sripada@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220913183341.908028-1-radhakrishna.sripada@intel.com> References: <20220913183341.908028-1-radhakrishna.sripada@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: dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Matt Roper Going forward, the hardware teams no longer consider new platforms to have a "generation" in the way we've defined it for past platforms. Instead, each IP block (graphics, media, display) will have their own architecture major.minor versions and stepping ID's which should be read directly from a register in the MMIO space. New hardware programming styles, features, and workarounds should be conditional solely on the architecture version, and should no longer be derived from the PCI device ID, revision ID, or platform-specific feature flags. Bspec: 63361, 64111 v2: - Move the IP version readout to intel_device_info.c - Convert the macro into a function v3: - Move subplatform init to runtime early init - Cache runtime ver, release info to compare with hardware values. - Use IP_VER for snaity check(MattR) Signed-off-by: Matt Roper Signed-off-by: Rodrigo Vivi Signed-off-by: Radhakrishna Sripada --- drivers/gpu/drm/i915/gt/intel_gt_regs.h | 2 + drivers/gpu/drm/i915/i915_driver.c | 3 +- drivers/gpu/drm/i915/i915_drv.h | 2 + drivers/gpu/drm/i915/i915_pci.c | 1 + drivers/gpu/drm/i915/i915_reg.h | 7 +++ drivers/gpu/drm/i915/intel_device_info.c | 74 +++++++++++++++++++++++- drivers/gpu/drm/i915/intel_device_info.h | 12 +++- 7 files changed, 98 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h index 2275ee47da95..2d2044f2ed9d 100644 --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h @@ -39,6 +39,8 @@ #define FORCEWAKE_ACK_RENDER_GEN9 _MMIO(0xd84) #define FORCEWAKE_ACK_MEDIA_GEN9 _MMIO(0xd88) +#define GMD_ID_GRAPHICS _MMIO(0xd8c) + #define MCFG_MCR_SELECTOR _MMIO(0xfd0) #define SF_MCR_SELECTOR _MMIO(0xfd8) #define GEN8_MCR_SELECTOR _MMIO(0xfdc) diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c index c459eb362c47..e86798eaecb6 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -337,7 +337,8 @@ static int i915_driver_early_probe(struct drm_i915_private *dev_priv) if (i915_inject_probe_failure(dev_priv)) return -ENODEV; - intel_device_info_subplatform_init(dev_priv); + intel_device_info_runtime_init_early(dev_priv); + intel_step_init(dev_priv); intel_uncore_mmio_debug_init_early(dev_priv); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9f9372931fd2..bec48cb0efef 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -940,6 +940,8 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define HAS_GMCH(dev_priv) (INTEL_INFO(dev_priv)->display.has_gmch) +#define HAS_GMD_ID(i915) INTEL_INFO(i915)->has_gmd_id + #define HAS_LSPCON(dev_priv) (IS_DISPLAY_VER(dev_priv, 9, 10)) #define HAS_L3_CCS_READ(i915) (INTEL_INFO(i915)->has_l3_ccs_read) diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c index 77e7df21f539..cace897e1db1 100644 --- a/drivers/gpu/drm/i915/i915_pci.c +++ b/drivers/gpu/drm/i915/i915_pci.c @@ -1143,6 +1143,7 @@ static const struct intel_device_info mtl_info = { .display.has_modular_fia = 1, .extra_gt_list = xelpmp_extra_gt, .has_flat_ccs = 0, + .has_gmd_id = 1, .has_snoop = 1, .__runtime.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM, .__runtime.platform_engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(CCS0), diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 09752a7217f8..0ab5fe70b482 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5828,6 +5828,11 @@ #define ICL_DSSM_CDCLK_PLL_REFCLK_19_2MHz (1 << 29) #define ICL_DSSM_CDCLK_PLL_REFCLK_38_4MHz (2 << 29) +#define GMD_ID_DISPLAY _MMIO(0x510a0) +#define GMD_ID_ARCH_MASK REG_GENMASK(31, 22) +#define GMD_ID_RELEASE_MASK REG_GENMASK(21, 14) +#define GMD_ID_STEP REG_GENMASK(5, 0) + /*GEN11 chicken */ #define _PIPEA_CHICKEN 0x70038 #define _PIPEB_CHICKEN 0x71038 @@ -8345,4 +8350,6 @@ enum skl_power_gate { #define MTL_TRAS_MASK REG_GENMASK(16, 8) #define MTL_TRDPRE_MASK REG_GENMASK(7, 0) +#define MTL_MEDIA_GSI_BASE 0x380000 + #endif /* _I915_REG_H_ */ diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c index 1434dc33cf49..68c58e38fe62 100644 --- a/drivers/gpu/drm/i915/intel_device_info.c +++ b/drivers/gpu/drm/i915/intel_device_info.c @@ -29,6 +29,7 @@ #include "display/intel_cdclk.h" #include "display/intel_de.h" +#include "gt/intel_gt_regs.h" #include "intel_device_info.h" #include "i915_drv.h" #include "i915_utils.h" @@ -231,7 +232,7 @@ static bool find_devid(u16 id, const u16 *p, unsigned int num) return false; } -void intel_device_info_subplatform_init(struct drm_i915_private *i915) +static void intel_device_info_subplatform_init(struct drm_i915_private *i915) { const struct intel_device_info *info = INTEL_INFO(i915); const struct intel_runtime_info *rinfo = RUNTIME_INFO(i915); @@ -288,6 +289,77 @@ void intel_device_info_subplatform_init(struct drm_i915_private *i915) RUNTIME_INFO(i915)->platform_mask[pi] |= mask; } +static void ip_ver_read(struct drm_i915_private *i915, u32 offset, struct ip_version *ip) +{ + struct pci_dev *pdev = to_pci_dev(i915->drm.dev); + void __iomem *addr; + u32 val; + u8 ver = ip->ver; + u8 rel = ip->rel; + + addr = pci_iomap_range(pdev, 0, offset, sizeof(u32)); + if (drm_WARN_ON(&i915->drm, !addr)) + return; + + val = ioread32(addr); + pci_iounmap(pdev, addr); + + ip->ver = REG_FIELD_GET(GMD_ID_ARCH_MASK, val); + ip->rel = REG_FIELD_GET(GMD_ID_RELEASE_MASK, val); + ip->step = REG_FIELD_GET(GMD_ID_STEP, val); + + /* Sanity check against expected versions from device info */ + if (IP_VER(ip->ver, ip->rel) < IP_VER(ver, rel)) + drm_dbg(&i915->drm, + "Hardware reports GMD IP version %u.%u but minimum expected is %u.%u\n", + ip->ver, ip->rel, ver, rel); +} + +/** + * Setup the graphics version for the current device. This must be done before + * any code that performs checks on GRAPHICS_VER or DISPLAY_VER, so this + * function should be called very early in the driver initialization sequence. + * + * Regular MMIO access is not yet setup at the point this function is called so + * we peek at the appropriate MMIO offset directly. The GMD_ID register is + * part of an 'always on' power well by design, so we don't need to worry about + * forcewake while reading it. + */ +static void intel_ipver_early_init(struct drm_i915_private *i915) +{ + struct intel_runtime_info *runtime = RUNTIME_INFO(i915); + + if (!HAS_GMD_ID(i915)) + return; + + ip_ver_read(i915, i915_mmio_reg_offset(GMD_ID_GRAPHICS), + &runtime->graphics.ip); + ip_ver_read(i915, i915_mmio_reg_offset(GMD_ID_DISPLAY), + &runtime->display.ip); + ip_ver_read(i915, MTL_MEDIA_GSI_BASE + i915_mmio_reg_offset(GMD_ID_GRAPHICS), + &runtime->media.ip); +} + +/** + * intel_device_info_runtime_init_early - initialize early runtime info + * @i915: the i915 device + * + * Determine early intel_device_info fields at runtime. + * + * Use it when: + * - Early init of certain runtime info fields are to be initialized + * + * This function needs to be called: + * - before the MMIO has been setup as we are reading registers, + * - before the PCH has been detected, + * - before the first usage of the fields it can tweak. + */ +void intel_device_info_runtime_init_early(struct drm_i915_private *i915) +{ + intel_ipver_early_init(i915); + intel_device_info_subplatform_init(i915); +} + /** * intel_device_info_runtime_init - initialize runtime info * @dev_priv: the i915 device diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h index 09b18910d3ab..e3aa88d33d63 100644 --- a/drivers/gpu/drm/i915/intel_device_info.h +++ b/drivers/gpu/drm/i915/intel_device_info.h @@ -153,6 +153,7 @@ enum intel_ppgtt_type { func(has_4tile); \ func(has_flat_ccs); \ func(has_global_mocs); \ + func(has_gmd_id); \ func(has_gt_uc); \ func(has_heci_pxp); \ func(has_heci_gscfi); \ @@ -198,9 +199,18 @@ enum intel_ppgtt_type { struct ip_version { u8 ver; u8 rel; + u8 step; }; struct intel_runtime_info { + /* + * On modern platforms, the architecture major.minor version numbers + * and stepping are read directly from the hardware rather than derived + * from the PCI device and revision ID's. + * + * Note that the hardware gives us a single "graphics" number that + * should represent render, compute, and copy behavior. + */ struct { struct ip_version ip; } graphics; @@ -309,7 +319,7 @@ struct intel_driver_caps { const char *intel_platform_name(enum intel_platform platform); -void intel_device_info_subplatform_init(struct drm_i915_private *dev_priv); +void intel_device_info_runtime_init_early(struct drm_i915_private *dev_priv); void intel_device_info_runtime_init(struct drm_i915_private *dev_priv); void intel_device_info_print(const struct intel_device_info *info,