From patchwork Wed Aug 7 17:00:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Wajdeczko X-Patchwork-Id: 11082469 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4C2B3746 for ; Wed, 7 Aug 2019 17:00:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 397F4286A2 for ; Wed, 7 Aug 2019 17:00:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 29A9E28703; Wed, 7 Aug 2019 17:00:56 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 26240286A2 for ; Wed, 7 Aug 2019 17:00:55 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 963496E749; Wed, 7 Aug 2019 17:00:54 +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 8A72A6E745 for ; Wed, 7 Aug 2019 17:00:50 +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; 07 Aug 2019 10:00:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,358,1559545200"; d="scan'208";a="192951081" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by fmsmga001.fm.intel.com with ESMTP; 07 Aug 2019 10:00:48 -0700 Received: from mwajdecz-MOBL1.ger.corp.intel.com (mwajdecz-mobl1.ger.corp.intel.com [172.28.174.50]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id x77H0h7v010955; Wed, 7 Aug 2019 18:00:47 +0100 From: Michal Wajdeczko To: intel-gfx@lists.freedesktop.org Date: Wed, 7 Aug 2019 17:00:34 +0000 Message-Id: <20190807170034.8440-8-michal.wajdeczko@intel.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20190807170034.8440-1-michal.wajdeczko@intel.com> References: <20190807170034.8440-1-michal.wajdeczko@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 7/7] drm/i915/uc: Hardening firmware fetch 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Insert few more failure points into firmware fetch procedure to check use of the wrong blob name or use of the mismatched firmware versions. Also update some messages (remove ptr, duplicated infos) and stop treating all fetch errors as missing firmware case. Signed-off-by: Michal Wajdeczko Cc: Daniele Ceraolo Spurio Cc: Chris Wilson --- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 137 ++++++++++++++++------- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 3 + 2 files changed, 97 insertions(+), 43 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c index 3a3803bfa5a8..4faff1010398 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c @@ -153,20 +153,23 @@ static const char *__override_huc_firmware_path(void) return ""; } -static bool -__uc_fw_override(struct intel_uc_fw *uc_fw) +static void __uc_fw_user_override(struct intel_uc_fw *uc_fw) { + const char *path = NULL; + switch (uc_fw->type) { case INTEL_UC_FW_TYPE_GUC: - uc_fw->path = __override_guc_firmware_path(); + path = __override_guc_firmware_path(); break; case INTEL_UC_FW_TYPE_HUC: - uc_fw->path = __override_huc_firmware_path(); + path = __override_huc_firmware_path(); break; } - uc_fw->user_overridden = uc_fw->path; - return uc_fw->user_overridden; + if (unlikely(path)) { + uc_fw->path = path; + uc_fw->user_overridden = true; + } } /** @@ -194,8 +197,10 @@ void intel_uc_fw_init_early(struct intel_uc_fw *uc_fw, uc_fw->type = type; - if (supported && likely(!__uc_fw_override(uc_fw))) + if (supported) { __uc_fw_auto_select(uc_fw, platform, rev); + __uc_fw_user_override(uc_fw); + } if (uc_fw->path && *uc_fw->path) uc_fw->status = INTEL_UC_FIRMWARE_SELECTED; @@ -203,6 +208,41 @@ void intel_uc_fw_init_early(struct intel_uc_fw *uc_fw, uc_fw->status = INTEL_UC_FIRMWARE_NOT_SUPPORTED; } +static void __force_fw_fetch_failures(struct intel_uc_fw *uc_fw, + struct drm_i915_private *i915, bool user) +{ + int e = user ? -EINVAL : -ESTALE; + + if (i915_inject_load_error(i915, e)) { + /* non-existing blob */ + uc_fw->path = ""; + uc_fw->user_overridden = user; + } else if (i915_inject_load_error(i915, e)) { + /* require next major version */ + uc_fw->major_ver_wanted += 1; + uc_fw->minor_ver_wanted = 0; + uc_fw->user_overridden = user; + } else if (i915_inject_load_error(i915, e)) { + /* require next minor version */ + uc_fw->minor_ver_wanted += 1; + uc_fw->user_overridden = user; + } else if (uc_fw->major_ver_wanted && i915_inject_load_error(i915, e)) { + /* require prev major version */ + uc_fw->major_ver_wanted -= 1; + uc_fw->minor_ver_wanted = 0; + uc_fw->user_overridden = user; + } else if (uc_fw->minor_ver_wanted && i915_inject_load_error(i915, e)) { + /* require prev minor version - hey, this should work! */ + uc_fw->minor_ver_wanted -= 1; + uc_fw->user_overridden = user; + } else if (user && i915_inject_load_error(i915, e)) { + /* officially unsupported platform */ + uc_fw->major_ver_wanted = 0; + uc_fw->minor_ver_wanted = 0; + uc_fw->user_overridden = true; + } +} + /** * intel_uc_fw_fetch - fetch uC firmware * @uc_fw: uC firmware @@ -222,17 +262,22 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) GEM_BUG_ON(!intel_uc_fw_supported(uc_fw)); + err = i915_inject_load_error(i915, -ENXIO); + if (err) + return err; + + __force_fw_fetch_failures(uc_fw, i915, true); + __force_fw_fetch_failures(uc_fw, i915, false); + err = request_firmware(&fw, uc_fw->path, i915->drm.dev); if (err) goto fail; - DRM_DEBUG_DRIVER("%s fw size %zu ptr %p\n", - intel_uc_fw_type_repr(uc_fw->type), fw->size, fw); - /* Check the size of the blob before examining buffer contents */ - if (fw->size < sizeof(struct uc_css_header)) { - DRM_WARN("%s: Unexpected firmware size (%zu, min %zu)\n", - intel_uc_fw_type_repr(uc_fw->type), + if (unlikely(fw->size < sizeof(struct uc_css_header))) { + dev_warn(i915->drm.dev, + "%s firmware %s: invalid size: %zu < %zu\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, fw->size, sizeof(struct uc_css_header)); err = -ENODATA; goto fail; @@ -243,10 +288,12 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) /* Check integrity of size values inside CSS header */ size = (css->header_size_dw - css->key_size_dw - css->modulus_size_dw - css->exponent_size_dw) * sizeof(u32); - if (size != sizeof(struct uc_css_header)) { - DRM_WARN("%s: Mismatched firmware header definition\n", - intel_uc_fw_type_repr(uc_fw->type)); - err = -ENOEXEC; + if (unlikely(size != sizeof(struct uc_css_header))) { + dev_warn(i915->drm.dev, + "%s firmware %s: unexpected header size: %zu != %zu\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, + fw->size, sizeof(struct uc_css_header)); + err = -EPROTO; goto fail; } @@ -254,19 +301,23 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) uc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32); /* now RSA */ - if (css->key_size_dw != UOS_RSA_SCRATCH_COUNT) { - DRM_WARN("%s: Mismatched firmware RSA key size (%u)\n", - intel_uc_fw_type_repr(uc_fw->type), css->key_size_dw); - err = -ENOEXEC; + if (unlikely(css->key_size_dw != UOS_RSA_SCRATCH_COUNT)) { + dev_warn(i915->drm.dev, + "%s firmware %s: unexpected RSA key size: %u != %u\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, + css->key_size_dw, UOS_RSA_SCRATCH_COUNT); + err = -EPROTO; goto fail; } uc_fw->rsa_size = css->key_size_dw * sizeof(u32); /* At least, it should have header, uCode and RSA. Size of all three. */ size = sizeof(struct uc_css_header) + uc_fw->ucode_size + uc_fw->rsa_size; - if (fw->size < size) { - DRM_WARN("%s: Truncated firmware (%zu, expected %zu)\n", - intel_uc_fw_type_repr(uc_fw->type), fw->size, size); + if (unlikely(fw->size < size)) { + dev_warn(i915->drm.dev, + "%s firmware %s: invalid size: %zu < %zu\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, + fw->size, size); err = -ENOEXEC; goto fail; } @@ -292,29 +343,22 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) break; } - DRM_DEBUG_DRIVER("%s fw version %u.%u (wanted %u.%u)\n", - intel_uc_fw_type_repr(uc_fw->type), - uc_fw->major_ver_found, uc_fw->minor_ver_found, - uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); - - if (uc_fw->major_ver_wanted == 0 && uc_fw->minor_ver_wanted == 0) { - DRM_NOTE("%s: Skipping firmware version check\n", - intel_uc_fw_type_repr(uc_fw->type)); - } else if (uc_fw->major_ver_found != uc_fw->major_ver_wanted || - uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { - DRM_NOTE("%s: Wrong firmware version (%u.%u, required %u.%u)\n", - intel_uc_fw_type_repr(uc_fw->type), + if (uc_fw->major_ver_found != uc_fw->major_ver_wanted || + uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { + dev_warn(i915->drm.dev, + "%s firmware %s: unexpected version: %u.%u != %u.%u\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, uc_fw->major_ver_found, uc_fw->minor_ver_found, uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); - err = -ENOEXEC; - goto fail; + if (!intel_uc_fw_is_overridden(uc_fw)) { + err = -ENOEXEC; + goto fail; + } } obj = i915_gem_object_create_shmem_from_data(i915, fw->data, fw->size); if (IS_ERR(obj)) { err = PTR_ERR(obj); - DRM_DEBUG_DRIVER("%s fw object_create err=%d\n", - intel_uc_fw_type_repr(uc_fw->type), err); goto fail; } @@ -322,15 +366,22 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) uc_fw->size = fw->size; uc_fw->status = INTEL_UC_FIRMWARE_AVAILABLE; + DRM_DEV_DEBUG_DRIVER(i915->drm.dev, "%s firmware %s: %s\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, + intel_uc_fw_status_repr(uc_fw->status)); + release_firmware(fw); return 0; fail: - uc_fw->status = INTEL_UC_FIRMWARE_MISSING; + if (err == -ENOENT) + uc_fw->status = INTEL_UC_FIRMWARE_MISSING; + else + uc_fw->status = INTEL_UC_FIRMWARE_ERROR; - DRM_WARN("%s: Failed to fetch firmware %s (error %d)\n", + dev_info(i915->drm.dev, "%s firmware %s: fetch failed with error %d\n", intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, err); - DRM_INFO("%s: Firmware can be downloaded from %s\n", + dev_info(i915->drm.dev, "%s firmware(s) can be downloaded from %s\n", intel_uc_fw_type_repr(uc_fw->type), INTEL_UC_FIRMWARE_URL); release_firmware(fw); /* OK even if fw is NULL */ diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h index fae45bc16bc7..0d22e73dff15 100644 --- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h @@ -42,6 +42,7 @@ enum intel_uc_fw_status { INTEL_UC_FIRMWARE_UNINITIALIZED = 0, /* used to catch checks done too early */ INTEL_UC_FIRMWARE_SELECTED, /* selected the blob we want to load */ INTEL_UC_FIRMWARE_MISSING, /* blob not found on the system */ + INTEL_UC_FIRMWARE_ERROR, /* invalid format or version */ INTEL_UC_FIRMWARE_AVAILABLE, /* blob found and copied in mem */ INTEL_UC_FIRMWARE_FAIL, /* failed to xfer or init/auth the fw */ INTEL_UC_FIRMWARE_TRANSFERRED, /* dma xfer done */ @@ -92,6 +93,8 @@ const char *intel_uc_fw_status_repr(enum intel_uc_fw_status status) return "SELECTED"; case INTEL_UC_FIRMWARE_MISSING: return "MISSING"; + case INTEL_UC_FIRMWARE_ERROR: + return "ERROR"; case INTEL_UC_FIRMWARE_AVAILABLE: return "AVAILABLE"; case INTEL_UC_FIRMWARE_FAIL: