From patchwork Tue Mar 16 05:29:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dixit, Ashutosh" X-Patchwork-Id: 12141271 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CDE8CC433E0 for ; Tue, 16 Mar 2021 05:29:32 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 66D2C65090 for ; Tue, 16 Mar 2021 05:29:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 66D2C65090 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 60A1F6E20F; Tue, 16 Mar 2021 05:29:29 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 455866E207 for ; Tue, 16 Mar 2021 05:29:27 +0000 (UTC) IronPort-SDR: XNevIRwE7pu4SMwpF+ZInospVFHxPG1LtyTyLcsScI3vGwCw5V9+VmRDHAMe4mdsOqW2jT/cyf b7qtSD6os/hA== X-IronPort-AV: E=McAfee;i="6000,8403,9924"; a="169119292" X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="169119292" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:26 -0700 IronPort-SDR: +JIXDLdOLB1OPyg7EtEIrLzSouKpjFAhNgZ/fmd++ZwhxCz3UeOAftvn4Ppn1GtNDrsnxAjPQ4 S/uUkdYXehYQ== X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="405423137" Received: from orsosgc001.ra.intel.com ([10.23.184.150]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:26 -0700 From: Ashutosh Dixit To: intel-gfx@lists.freedesktop.org Date: Mon, 15 Mar 2021 22:29:19 -0700 Message-Id: <164405a03daae93b74fe9d99c14a31ff208aa37d.1615872114.git.ashutosh.dixit@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 1/3] drm/i915/gem: Drop legacy execbuffer support (v2) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" From: Jason Ekstrand libdrm has supported the newer execbuffer2 ioctl and using it by default when it exists since libdrm commit b50964027bef which landed Mar 2, 2010. The i915 and i965 drivers in Mesa at the time both used libdrm and so did the Intel X11 back-end. The SNA back-end for X11 has always used execbuffer2. v2 (Jason Ekstrand): - Add a comment saying what Linux version it's being removed in. Signed-off-by: Jason Ekstrand Acked-by: Keith Packard Acked-by: Dave Airlie --- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 100 ------------------ drivers/gpu/drm/i915/gem/i915_gem_ioctls.h | 2 - drivers/gpu/drm/i915/i915_drv.c | 2 +- include/uapi/drm/i915_drm.h | 1 + 4 files changed, 2 insertions(+), 103 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index fe170186dd428..99772f37bff60 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -3394,106 +3394,6 @@ static bool check_buffer_count(size_t count) return !(count < 1 || count > INT_MAX || count > SIZE_MAX / sz - 1); } -/* - * Legacy execbuffer just creates an exec2 list from the original exec object - * list array and passes it to the real function. - */ -int -i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data, - struct drm_file *file) -{ - struct drm_i915_private *i915 = to_i915(dev); - struct drm_i915_gem_execbuffer *args = data; - struct drm_i915_gem_execbuffer2 exec2; - struct drm_i915_gem_exec_object *exec_list = NULL; - struct drm_i915_gem_exec_object2 *exec2_list = NULL; - const size_t count = args->buffer_count; - unsigned int i; - int err; - - if (!check_buffer_count(count)) { - drm_dbg(&i915->drm, "execbuf2 with %zd buffers\n", count); - return -EINVAL; - } - - exec2.buffers_ptr = args->buffers_ptr; - exec2.buffer_count = args->buffer_count; - exec2.batch_start_offset = args->batch_start_offset; - exec2.batch_len = args->batch_len; - exec2.DR1 = args->DR1; - exec2.DR4 = args->DR4; - exec2.num_cliprects = args->num_cliprects; - exec2.cliprects_ptr = args->cliprects_ptr; - exec2.flags = I915_EXEC_RENDER; - i915_execbuffer2_set_context_id(exec2, 0); - - err = i915_gem_check_execbuffer(&exec2); - if (err) - return err; - - /* Copy in the exec list from userland */ - exec_list = kvmalloc_array(count, sizeof(*exec_list), - __GFP_NOWARN | GFP_KERNEL); - - /* Allocate extra slots for use by the command parser */ - exec2_list = kvmalloc_array(count + 2, eb_element_size(), - __GFP_NOWARN | GFP_KERNEL); - if (exec_list == NULL || exec2_list == NULL) { - drm_dbg(&i915->drm, - "Failed to allocate exec list for %d buffers\n", - args->buffer_count); - kvfree(exec_list); - kvfree(exec2_list); - return -ENOMEM; - } - err = copy_from_user(exec_list, - u64_to_user_ptr(args->buffers_ptr), - sizeof(*exec_list) * count); - if (err) { - drm_dbg(&i915->drm, "copy %d exec entries failed %d\n", - args->buffer_count, err); - kvfree(exec_list); - kvfree(exec2_list); - return -EFAULT; - } - - for (i = 0; i < args->buffer_count; i++) { - exec2_list[i].handle = exec_list[i].handle; - exec2_list[i].relocation_count = exec_list[i].relocation_count; - exec2_list[i].relocs_ptr = exec_list[i].relocs_ptr; - exec2_list[i].alignment = exec_list[i].alignment; - exec2_list[i].offset = exec_list[i].offset; - if (INTEL_GEN(to_i915(dev)) < 4) - exec2_list[i].flags = EXEC_OBJECT_NEEDS_FENCE; - else - exec2_list[i].flags = 0; - } - - err = i915_gem_do_execbuffer(dev, file, &exec2, exec2_list); - if (exec2.flags & __EXEC_HAS_RELOC) { - struct drm_i915_gem_exec_object __user *user_exec_list = - u64_to_user_ptr(args->buffers_ptr); - - /* Copy the new buffer offsets back to the user's exec list. */ - for (i = 0; i < args->buffer_count; i++) { - if (!(exec2_list[i].offset & UPDATE)) - continue; - - exec2_list[i].offset = - gen8_canonical_addr(exec2_list[i].offset & PIN_OFFSET_MASK); - exec2_list[i].offset &= PIN_OFFSET_MASK; - if (__copy_to_user(&user_exec_list[i].offset, - &exec2_list[i].offset, - sizeof(user_exec_list[i].offset))) - break; - } - } - - kvfree(exec_list); - kvfree(exec2_list); - return err; -} - int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data, struct drm_file *file) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h index 87d8b27f426de..7fd22f3efbef0 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h +++ b/drivers/gpu/drm/i915/gem/i915_gem_ioctls.h @@ -14,8 +14,6 @@ int i915_gem_busy_ioctl(struct drm_device *dev, void *data, struct drm_file *file); int i915_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file); -int i915_gem_execbuffer_ioctl(struct drm_device *dev, void *data, - struct drm_file *file); int i915_gem_execbuffer2_ioctl(struct drm_device *dev, void *data, struct drm_file *file); int i915_gem_get_aperture_ioctl(struct drm_device *dev, void *data, diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 3edd5e47ad682..64edcab59fe12 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -1701,7 +1701,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = { DRM_IOCTL_DEF_DRV(I915_VBLANK_SWAP, drm_noop, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_HWS_ADDR, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_INIT, drm_noop, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), - DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, i915_gem_execbuffer_ioctl, DRM_AUTH), + DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER, drm_invalid_op, DRM_AUTH), DRM_IOCTL_DEF_DRV(I915_GEM_EXECBUFFER2_WR, i915_gem_execbuffer2_ioctl, DRM_RENDER_ALLOW), DRM_IOCTL_DEF_DRV(I915_GEM_PIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), DRM_IOCTL_DEF_DRV(I915_GEM_UNPIN, i915_gem_reject_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h index 1987e2ea79a3b..ddc47bbf48b6d 100644 --- a/include/uapi/drm/i915_drm.h +++ b/include/uapi/drm/i915_drm.h @@ -943,6 +943,7 @@ struct drm_i915_gem_exec_object { __u64 offset; }; +/* DRM_IOCTL_I915_GEM_EXECBUFFER was removed in Linux 5.13 */ struct drm_i915_gem_execbuffer { /** * List of buffers to be validated with their relocations to be From patchwork Tue Mar 16 05:29:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dixit, Ashutosh" X-Patchwork-Id: 12141273 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA7ACC433DB for ; Tue, 16 Mar 2021 05:29:33 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 9C7CE65090 for ; Tue, 16 Mar 2021 05:29:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9C7CE65090 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7C4936E210; Tue, 16 Mar 2021 05:29:31 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6C91B6E201 for ; Tue, 16 Mar 2021 05:29:27 +0000 (UTC) IronPort-SDR: 8vysl9ujQsn8pM9OBmX56TVSNY2vwzRnnf7NK0eezoZEaRjN65lnoxtfRLD2cZxVI8p6wRO5GR dtonLsNrg6gA== X-IronPort-AV: E=McAfee;i="6000,8403,9924"; a="169119293" X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="169119293" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:26 -0700 IronPort-SDR: sHBBLbsiWqpq5g/VklnJpa1a8JXMh/lqOhmtik/pBBtEHgz5vrSokkTDzF7t7HnQ3rV3BSEEAm xj3MydUFl/OA== X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="405423138" Received: from orsosgc001.ra.intel.com ([10.23.184.150]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:26 -0700 From: Ashutosh Dixit To: intel-gfx@lists.freedesktop.org Date: Mon, 15 Mar 2021 22:29:20 -0700 Message-Id: <9f92ca239245bce8db9c90a4d643d8101ffc9269.1615872114.git.ashutosh.dixit@intel.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 2/3] drm/i915/gem: Drop relocation support on all new hardware (v5) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" From: Jason Ekstrand The Vulkan driver in Mesa for Intel hardware never uses relocations if it's running on a version of i915 that supports at least softpin which all versions of i915 supporting Gen12 do. On the OpenGL side, Gen12+ is only supported by iris which never uses relocations. The older i965 driver in Mesa does use relocations but it only supports Intel hardware through Gen11 and has been deprecated for all hardware Gen9+. The compute driver also never uses relocations. This only leaves the media driver which is supposed to be switching to softpin going forward. Making softpin a requirement for all future hardware seems reasonable. There is one piece of hardware enabled by default in i915: RKL which was enabled by e22fa6f0a976 which has not yet landed in drm-next so this almost but not really a userspace API change for RKL. If it becomes a problem, we can always add !IS_ROCKETLAKE(eb->i915) to the condition. Rejecting relocations starting with newer Gen12 platforms has the benefit that we don't have to bother supporting it on platforms with local memory. Given how much CPU touching of memory is required for relocations, not having to do so on platforms where not all memory is directly CPU-accessible carries significant advantages. v2 (Jason Ekstrand): - Allow TGL-LP platforms as they've already shipped v3 (Jason Ekstrand): - WARN_ON platforms with LMEM support in case the check is wrong v4 (Jason Ekstrand): - Call out Rocket Lake in the commit message v5 (Jason Ekstrand): - Drop the HAS_LMEM check as it's already covered by the version check Signed-off-by: Jason Ekstrand Reviewed-by: Zbigniew Kempczyński Reviewed-by: Maarten Lankhorst --- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index 99772f37bff60..f66cff2943baa 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -1764,7 +1764,8 @@ eb_relocate_vma_slow(struct i915_execbuffer *eb, struct eb_vma *ev) return err; } -static int check_relocations(const struct drm_i915_gem_exec_object2 *entry) +static int check_relocations(const struct i915_execbuffer *eb, + const struct drm_i915_gem_exec_object2 *entry) { const char __user *addr, *end; unsigned long size; @@ -1774,6 +1775,12 @@ static int check_relocations(const struct drm_i915_gem_exec_object2 *entry) if (size == 0) return 0; + /* Relocations are disallowed for all platforms after TGL-LP. This + * also covers all platforms with local memory. + */ + if (INTEL_GEN(eb->i915) >= 12 && !IS_TIGERLAKE(eb->i915)) + return -EINVAL; + if (size > N_RELOC(ULONG_MAX)) return -EINVAL; @@ -1807,7 +1814,7 @@ static int eb_copy_relocations(const struct i915_execbuffer *eb) if (nreloc == 0) continue; - err = check_relocations(&eb->exec[i]); + err = check_relocations(eb, &eb->exec[i]); if (err) goto err; @@ -1880,7 +1887,7 @@ static int eb_prefault_relocations(const struct i915_execbuffer *eb) for (i = 0; i < count; i++) { int err; - err = check_relocations(&eb->exec[i]); + err = check_relocations(eb, &eb->exec[i]); if (err) return err; } From patchwork Tue Mar 16 05:29:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dixit, Ashutosh" X-Patchwork-Id: 12141269 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-21.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E2136C433DB for ; Tue, 16 Mar 2021 05:29:30 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 90E6C65012 for ; Tue, 16 Mar 2021 05:29:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 90E6C65012 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D21A56E207; Tue, 16 Mar 2021 05:29:28 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 961C16E207 for ; Tue, 16 Mar 2021 05:29:27 +0000 (UTC) IronPort-SDR: WbLIyNu2KPxF/jSGuewDU8wuoOI55t+1SePV3N/A8s3rSy1UMCm63VvAZKYVz2mO/5L5i0AOpk LfCmSEA8lt5w== X-IronPort-AV: E=McAfee;i="6000,8403,9924"; a="169119294" X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="169119294" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:27 -0700 IronPort-SDR: oi3doHhrRCdu8nakHtPA0UyRSG+qGFWeW8E4g1dubPwkawrYJ/RXGNNe6KnVS/mUhbFQzk4eZg mgeTobCbB5ZQ== X-IronPort-AV: E=Sophos;i="5.81,251,1610438400"; d="scan'208";a="405423139" Received: from orsosgc001.ra.intel.com ([10.23.184.150]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2021 22:29:26 -0700 From: Ashutosh Dixit To: intel-gfx@lists.freedesktop.org Date: Mon, 15 Mar 2021 22:29:21 -0700 Message-Id: X-Mailer: git-send-email 2.29.2 In-Reply-To: References: MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/3] drm/i915: Disable pread/pwrite ioctl's for future platforms (v3) X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 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" The rationale for this change is roughly as follows: 1. The functionality can be done entirely in userspace with a combination of mmap + memcpy 2. The only reason anyone in userspace is still using it is because someone implemented bo_subdata that way in libdrm ages ago and they're all too lazy to write the 5 lines of code to do a map. 3. This falls cleanly into the category of things which will only get more painful with local memory support. These ioctls aren't used much anymore by "real" userspace drivers. Vulkan has never used them and neither has the iris GL driver. The old i965 GL driver does use PWRITE for glBufferSubData but it only supports up through Gen11; Gen12 was never enabled in i965. The compute driver has never used PREAD/PWRITE. The only remaining user is the media driver which uses it exactly twice and they're easily removed [1] so expecting them to drop it going forward is reasonable. IGT changes which handle this kernel change have also been submitted [2]. [1] https://github.com/intel/media-driver/pull/1160 [2] https://patchwork.freedesktop.org/series/81384/ v2 (Jason Ekstrand): - Improved commit message with the status of all usermode drivers - A more future-proof platform check v3 (Jason Ekstrand): - Drop the HAS_LMEM checks as they're already covered by the version checks Signed-off-by: Ashutosh Dixit Signed-off-by: Jason Ekstrand Reviewed-by: Jason Ekstrand --- drivers/gpu/drm/i915/i915_gem.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index b2e3b5cfccb4a..80915467e0d84 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -374,10 +374,17 @@ int i915_gem_pread_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { + struct drm_i915_private *i915 = to_i915(dev); struct drm_i915_gem_pread *args = data; struct drm_i915_gem_object *obj; int ret; + /* PREAD is disallowed for all platforms after TGL-LP. This also + * covers all platforms with local memory. + */ + if (INTEL_GEN(i915) >= 12 && !IS_TIGERLAKE(i915)) + return -EOPNOTSUPP; + if (args->size == 0) return 0; @@ -675,10 +682,17 @@ int i915_gem_pwrite_ioctl(struct drm_device *dev, void *data, struct drm_file *file) { + struct drm_i915_private *i915 = to_i915(dev); struct drm_i915_gem_pwrite *args = data; struct drm_i915_gem_object *obj; int ret; + /* PWRITE is disallowed for all platforms after TGL-LP. This also + * covers all platforms with local memory. + */ + if (INTEL_GEN(i915) >= 12 && !IS_TIGERLAKE(i915)) + return -EOPNOTSUPP; + if (args->size == 0) return 0;