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bh=0O0ldd1Us+19/r2rRjhTUavxxLCXkOyGxU3ENiH5tws=; b=L6fbxjqXJ82P5hZgRwCnAiU1hM8W7n1EpFF/wGCi9YrFEMApM9VZnAhBSsHQ8fFK0ldW0g YX9aZSrJPTmV6QJB+WUPJFZ7iL6KKyTiD3nouB9iriLfLAD77ETaMoZ8KmkSeNaQqs/Cro hrt2zLQxISsw6MWk8u/k7LovqmdN2sk= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-180-9C_lQUEcORap9zrzwPAuLw-1; Tue, 15 Sep 2026 20:22:54 -0400 X-MC-Unique: 9C_lQUEcORap9zrzwPAuLw-1 X-Mimecast-MFC-AGG-ID: 9C_lQUEcORap9zrzwPAuLw_1789518172 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9877C185BE9D; Wed, 16 Sep 2026 00:22:51 +0000 (UTC) Received: from GoldenWind.lan (unknown [10.22.80.21]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 320673003EFB; Wed, 16 Sep 2026 00:22:49 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/5] drm/nouveau/gsp/r570: Add comp mode workaround from issue #3172217 Date: Tue, 15 Sep 2026 20:09:53 -0400 Message-ID: <20260916001603.22394-4-lyude@redhat.com> In-Reply-To: <20260916001603.22394-1-lyude@redhat.com> References: <20260916001603.22394-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: vxcMBQ9whhqBBet1pJetoceRbGUn1wvjOY0k_Ov2vvU_1789518172 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true Message-ID-Hash: RRHGTRADN4TMU422Y3ZKCWWKEEPQNHYE X-Message-ID-Hash: RRHGTRADN4TMU422Y3ZKCWWKEEPQNHYE X-MailFrom: lyude@redhat.com X-Mailman-Rule-Hits: member-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address CC: Dave Airlie , Mohamed Ahmed , Andy Shevchenko , Maarten Lankhorst , Kees Cook , Simona Vetter , Maxime Ripard , Hongling Zeng , Danilo Krummrich X-Mailman-Version: 3.3.8 Precedence: list List-Id: Nouveau development list Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: One of the things that OpenRM does right before initiating fbsr is apply a special workaround (nvidia issue #3172217) which temporarily disables raw compression mode on the GPU. It is later re-enabled after resuming with fbsr completes. Since we don't currently save the compbit backing with fbsr, this shouldn't currently make any functional difference in the suspend/resume process. But it will be required for implementing support for saving and restoring compbit backings from the GPU. Signed-off-by: Lyude Paul --- V2: * Fix gsp object mismatch in r570_memsys_enable_raw_comp_mode() * Clarify debug message a bit in r570_memsys_enable_raw_comp_mode() V3: * Enable raw mode before rescheduling FIFO channels .../nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c | 48 +++++++++++++++++++ .../nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h | 6 +++ 2 files changed, 54 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c index af5aa5065c3dd..fe618a94461dc 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c @@ -26,6 +26,35 @@ r570_fbsr_suspend_channels(struct nvkm_gsp *gsp, bool suspend) return nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.subdevice, ctrl); } +static int +r570_memsys_enable_raw_comp_mode(struct nvkm_gsp *gsp, bool enable) +{ + NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS *ctrl; + int ret; + + ctrl = nvkm_gsp_rm_ctrl_get(&gsp->internal.device.object, + NV2080_CTRL_CMD_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE, + sizeof(*ctrl)); + if (IS_ERR(ctrl)) + return PTR_ERR(ctrl); + + ctrl->bRawMode = enable; + + ret = nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.object, ctrl); + if (!ret) + nvkm_debug(&gsp->subdev, "memsys: Raw compression mode %s\n", + str_enabled_disabled(enable)); + + return ret; +} + +static bool +r570_need_raw_comp_war(struct nvkm_gsp *gsp, struct nvkm_device *device) +{ + return (device->card_type == GA100 || device->card_type == AD100) && + gsp->memsys.use_raw_mode_comptagline_alloc; +} + static void r570_fbsr_resume(struct nvkm_gsp *gsp) { @@ -33,6 +62,7 @@ r570_fbsr_resume(struct nvkm_gsp *gsp) struct nvkm_instmem *imem = device->imem; struct nvkm_instobj *iobj; struct nvkm_vmm *vmm; + int ret; /* Restore BAR2 page tables via BAR0 window, and re-enable BAR2. */ list_for_each_entry(iobj, &imem->boot, head) { @@ -54,6 +84,13 @@ r570_fbsr_resume(struct nvkm_gsp *gsp) vmm = nvkm_bar_bar1_vmm(device); vmm->func->flush(vmm, 0); + /* Re-enable raw mode if it was previously disabled */ + if (r570_need_raw_comp_war(gsp, device)) { + ret = r570_memsys_enable_raw_comp_mode(gsp, true); + if (ret) + nvkm_error(&gsp->subdev, "Failed to re-enable raw comp mode\n"); + } + /* Resume channel scheduling. */ r570_fbsr_suspend_channels(device->gsp, false); @@ -104,6 +141,17 @@ r570_fbsr_suspend(struct nvkm_gsp *gsp) /* Stop channel scheduling. */ r570_fbsr_suspend_channels(gsp, true); + /* Temporarily disable raw mode to prevent FBSR restore operations from corrupting + * compressed surfaces. Required for ampere and ada. + * + * Nvidia bug #3172217 + */ + if (r570_need_raw_comp_war(gsp, device)) { + ret = r570_memsys_enable_raw_comp_mode(gsp, false); + if (ret) + return ret; + } + /* Save BAR2 allocations to system memory. */ list_for_each_entry(iobj, &imem->list, head) { if (iobj->preserve) { diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h index 8af432375f7a2..9050a8274b273 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h @@ -16,4 +16,10 @@ typedef struct NV2080_CTRL_INTERNAL_FBSR_INIT_PARAMS { NV_DECLARE_ALIGNED(NvU64 sysmemAddrOfSuspendResumeData, 8); } NV2080_CTRL_INTERNAL_FBSR_INIT_PARAMS; +#define NV2080_CTRL_CMD_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE (0x20800a6f) /* finn: Evaluated from "(FINN_NV20_SUBDEVICE_0_INTERNAL_INTERFACE_ID << 8) | NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS_MESSAGE_ID" */ + +typedef struct NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS { + NvBool bRawMode; +} NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS; + #endif -- 2.55.0 From mboxrd@z Thu Jan 1 00:00:00 1970 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 47093C88E7F for ; Wed, 16 Sep 2026 00:23:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6B49310E5DF; Wed, 16 Sep 2026 00:23:02 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="N+f0OGuh"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9674610E4B3 for ; 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Wed, 16 Sep 2026 00:22:51 +0000 (UTC) Received: from GoldenWind.lan (unknown [10.22.80.21]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 320673003EFB; Wed, 16 Sep 2026 00:22:49 +0000 (UTC) From: Lyude Paul To: dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org Cc: "Timur Tabi" , "Dave Airlie" , "Mohamed Ahmed" , "Andy Shevchenko" , "Maarten Lankhorst" , "Kees Cook" , "Simona Vetter" , "David Airlie" , "Thomas Zimmermann" , "Maxime Ripard" , "Hongling Zeng" , "Mel Henning" , "Danilo Krummrich" , "Lyude Paul" Subject: [PATCH v3 3/5] drm/nouveau/gsp/r570: Add comp mode workaround from issue #3172217 Date: Tue, 15 Sep 2026 20:09:53 -0400 Message-ID: <20260916001603.22394-4-lyude@redhat.com> In-Reply-To: <20260916001603.22394-1-lyude@redhat.com> References: <20260916001603.22394-1-lyude@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: O8gNpygPvqZMWpZ1PovoQg2PDlFmF_9FGHdC_pjFQCA_1789518172 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" One of the things that OpenRM does right before initiating fbsr is apply a special workaround (nvidia issue #3172217) which temporarily disables raw compression mode on the GPU. It is later re-enabled after resuming with fbsr completes. Since we don't currently save the compbit backing with fbsr, this shouldn't currently make any functional difference in the suspend/resume process. But it will be required for implementing support for saving and restoring compbit backings from the GPU. Signed-off-by: Lyude Paul --- V2: * Fix gsp object mismatch in r570_memsys_enable_raw_comp_mode() * Clarify debug message a bit in r570_memsys_enable_raw_comp_mode() V3: * Enable raw mode before rescheduling FIFO channels .../nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c | 48 +++++++++++++++++++ .../nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h | 6 +++ 2 files changed, 54 insertions(+) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c index af5aa5065c3dd..fe618a94461dc 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/fbsr.c @@ -26,6 +26,35 @@ r570_fbsr_suspend_channels(struct nvkm_gsp *gsp, bool suspend) return nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.subdevice, ctrl); } +static int +r570_memsys_enable_raw_comp_mode(struct nvkm_gsp *gsp, bool enable) +{ + NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS *ctrl; + int ret; + + ctrl = nvkm_gsp_rm_ctrl_get(&gsp->internal.device.object, + NV2080_CTRL_CMD_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE, + sizeof(*ctrl)); + if (IS_ERR(ctrl)) + return PTR_ERR(ctrl); + + ctrl->bRawMode = enable; + + ret = nvkm_gsp_rm_ctrl_wr(&gsp->internal.device.object, ctrl); + if (!ret) + nvkm_debug(&gsp->subdev, "memsys: Raw compression mode %s\n", + str_enabled_disabled(enable)); + + return ret; +} + +static bool +r570_need_raw_comp_war(struct nvkm_gsp *gsp, struct nvkm_device *device) +{ + return (device->card_type == GA100 || device->card_type == AD100) && + gsp->memsys.use_raw_mode_comptagline_alloc; +} + static void r570_fbsr_resume(struct nvkm_gsp *gsp) { @@ -33,6 +62,7 @@ r570_fbsr_resume(struct nvkm_gsp *gsp) struct nvkm_instmem *imem = device->imem; struct nvkm_instobj *iobj; struct nvkm_vmm *vmm; + int ret; /* Restore BAR2 page tables via BAR0 window, and re-enable BAR2. */ list_for_each_entry(iobj, &imem->boot, head) { @@ -54,6 +84,13 @@ r570_fbsr_resume(struct nvkm_gsp *gsp) vmm = nvkm_bar_bar1_vmm(device); vmm->func->flush(vmm, 0); + /* Re-enable raw mode if it was previously disabled */ + if (r570_need_raw_comp_war(gsp, device)) { + ret = r570_memsys_enable_raw_comp_mode(gsp, true); + if (ret) + nvkm_error(&gsp->subdev, "Failed to re-enable raw comp mode\n"); + } + /* Resume channel scheduling. */ r570_fbsr_suspend_channels(device->gsp, false); @@ -104,6 +141,17 @@ r570_fbsr_suspend(struct nvkm_gsp *gsp) /* Stop channel scheduling. */ r570_fbsr_suspend_channels(gsp, true); + /* Temporarily disable raw mode to prevent FBSR restore operations from corrupting + * compressed surfaces. Required for ampere and ada. + * + * Nvidia bug #3172217 + */ + if (r570_need_raw_comp_war(gsp, device)) { + ret = r570_memsys_enable_raw_comp_mode(gsp, false); + if (ret) + return ret; + } + /* Save BAR2 allocations to system memory. */ list_for_each_entry(iobj, &imem->list, head) { if (iobj->preserve) { diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h index 8af432375f7a2..9050a8274b273 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/rm/r570/nvrm/fbsr.h @@ -16,4 +16,10 @@ typedef struct NV2080_CTRL_INTERNAL_FBSR_INIT_PARAMS { NV_DECLARE_ALIGNED(NvU64 sysmemAddrOfSuspendResumeData, 8); } NV2080_CTRL_INTERNAL_FBSR_INIT_PARAMS; +#define NV2080_CTRL_CMD_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE (0x20800a6f) /* finn: Evaluated from "(FINN_NV20_SUBDEVICE_0_INTERNAL_INTERFACE_ID << 8) | NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS_MESSAGE_ID" */ + +typedef struct NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS { + NvBool bRawMode; +} NV2080_CTRL_INTERNAL_MEMSYS_PROGRAM_RAW_COMPRESSION_MODE_PARAMS; + #endif -- 2.55.0