From patchwork Wed Aug 7 18:37:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Wajdeczko X-Patchwork-Id: 11082551 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 50C8C912 for ; Wed, 7 Aug 2019 18:38:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 410842871C for ; Wed, 7 Aug 2019 18:38:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 34D4C28A5C; Wed, 7 Aug 2019 18:38:14 +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 81C4B2871C for ; Wed, 7 Aug 2019 18:38:13 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2D2D26E757; Wed, 7 Aug 2019 18:38:12 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by gabe.freedesktop.org (Postfix) with ESMTPS id 3FEFA6E757 for ; Wed, 7 Aug 2019 18:38:11 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 07 Aug 2019 11:38:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,358,1559545200"; d="scan'208";a="186087190" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by orsmga002.jf.intel.com with ESMTP; 07 Aug 2019 11:38:09 -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 x77Ic7tr006134; Wed, 7 Aug 2019 19:38:08 +0100 From: Michal Wajdeczko To: intel-gfx@lists.freedesktop.org Date: Wed, 7 Aug 2019 18:37:59 +0000 Message-Id: <20190807183759.8588-1-michal.wajdeczko@intel.com> X-Mailer: git-send-email 2.21.0.windows.1 In-Reply-To: <20190807170034.8440-8-michal.wajdeczko@intel.com> References: <20190807170034.8440-8-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. v2: update log levels (Chris) Signed-off-by: Michal Wajdeczko Cc: Daniele Ceraolo Spurio Cc: Chris Wilson Reviewed-by: Chris Wilson --- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 142 +++++++++++++++-------- drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 3 + 2 files changed, 98 insertions(+), 47 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..a8007d622f57 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 @@ -214,6 +254,7 @@ void intel_uc_fw_init_early(struct intel_uc_fw *uc_fw, */ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw, struct drm_i915_private *i915) { + struct device *dev = i915->drm.dev; struct drm_i915_gem_object *obj; const struct firmware *fw = NULL; struct uc_css_header *css; @@ -222,17 +263,21 @@ 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 = request_firmware(&fw, uc_fw->path, i915->drm.dev); + err = i915_inject_load_error(i915, -ENXIO); if (err) - goto fail; + return err; - DRM_DEBUG_DRIVER("%s fw size %zu ptr %p\n", - intel_uc_fw_type_repr(uc_fw->type), fw->size, fw); + __force_fw_fetch_failures(uc_fw, i915, true); + __force_fw_fetch_failures(uc_fw, i915, false); + + err = request_firmware(&fw, uc_fw->path, dev); + if (err) + goto fail; /* 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(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(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 +301,21 @@ 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(dev, "%s firmware %s: unexpected 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(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 +341,21 @@ 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), - 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 (uc_fw->major_ver_found != uc_fw->major_ver_wanted || + uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { + dev_notice(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); + 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 +363,22 @@ 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(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", - intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, err); - DRM_INFO("%s: Firmware can be downloaded from %s\n", + dev_notice(dev, "%s firmware %s: fetch failed with error %d\n", + intel_uc_fw_type_repr(uc_fw->type), uc_fw->path, err); + dev_info(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: