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Iglesias" , "Michael S . Tsirkin" , Marcel Apfelbaum , CC: Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , "Xenia Ragiadakou" , Julia Zhang , "Chen Jiqian" , Huang Rui , Penny Zheng , Zhu Lingshan , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= , Jan Beulich , Juergen Gross , Oleksandr Tyshchenko , Subject: [PATCH 3/3] virtio-gpu: add a new command to get p2pdma_distance Date: Sat, 7 Dec 2024 18:55:40 +0800 Message-ID: <20241207105537.542441-4-julia.zhang@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241207105537.542441-1-julia.zhang@amd.com> References: <20241207105537.542441-1-julia.zhang@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B371:EE_|DM4PR12MB7501:EE_ X-MS-Office365-Filtering-Correlation-Id: de85b411-cd99-41cf-2525-08dd16adfac7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|7416014|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?+qa/yUL1d3QdPp0XvV+rfvpR0waCVpnNrP2Z6qcNRnuryjjeNRBJEERL51uj?= =?us-ascii?Q?weuuOZV0jJk4gAOVI+FF9DpMav+r8yJ+jTfT7TQw2/SuNtn9p7QYq8/yLHvm?= =?us-ascii?Q?gNgeUCpn/3pKsRlZZUf6AaVmaM7LR9lRITZchEKI4X64sfTT+dFwgFxymw59?= =?us-ascii?Q?O0rpDGUzZEVn0nDQ22n8DfAMbM8sr2dntAAImKsn7t3B6aHXjGuwRs+ikRn6?= =?us-ascii?Q?MOOjgV7CHgr8eF3YHZaMpsJPItEqNjcdl3vq9X7Q42/uQkVK6aSjsKO8n6bz?= =?us-ascii?Q?3Cei0JOIkPYNfVOzzrbk5erVR0WE5CsQUDYQqX5IQkF9fCZ84+y9sorxD5DP?= =?us-ascii?Q?oqLzpoGzat5dqyFcTCY+z22i41A/uNL/20g//KB1GOd2uKXb/AWpRCO+Xfh5?= =?us-ascii?Q?qeVE0WARvWXwtwEdpiVOwD5j6nCt0GHos5BcfJLXRj4T2BXJ1ghU8/1V5MBB?= =?us-ascii?Q?2nNQxjph0tE4wklH5qIilcCuXDPhOWROzxzuDK1Gdqru/Ne5kZCCO4F51RRe?= =?us-ascii?Q?GDvdwSHyE+Slk6XAbEPEu59PYZ5q9DwUjoDN6d7X4j6xNegfYcnWI2QGUU5c?= =?us-ascii?Q?ygLk8E4qXSnXQD6KBHAVDQxhVvp2BwauMBMObTOuGMifABQku11YFchgcOfx?= =?us-ascii?Q?zidK9Iz7MVW5yY+gA4gWTYGRlbh/JwnRF6MYZXhjEec217h3xjpMGJUlqjtJ?= =?us-ascii?Q?skbYAO8y4mW/8llD1hGYDQPWeUfQIA0tWELTEyZ6CN9yAEucVVwShpvcvCzU?= =?us-ascii?Q?M18584lDBHx9/ZOE69Uogfq8PYKUOa7zRhAQj6mgmQAhc5aLvxNNYD7a/ETN?= =?us-ascii?Q?tPvbT/9TdZ5OwVNVQ4tZRKb4U7vNjzVI4tsNXasbtLCSwJ6wUEdhwQmcj7BC?= =?us-ascii?Q?1ayHO8N3wZdXGVOqfw0HHcpYoxrDrLjGBWlLFwC9RYntowFneZ0u8U1DbZs+?= =?us-ascii?Q?IvMdAFS/9+QOPfybWhdVH75ctPjWXSVk6t5r1DFRhMFfu3taG+umnAalNfGm?= =?us-ascii?Q?OSosjeCioNmoUSqIE/L8WJJqQ03Ll8nyjoDOEmDM5jmDbokdxnxzq/lCg5oz?= =?us-ascii?Q?3kqrJoIBCQzqwGOwmI+LSoIL8kfWAR0B4SE//9pGnd4/Js9ImiwK9eCxPjEU?= =?us-ascii?Q?qtWlFHIX6Yn7vj4kXqWnjXKRWtFCZIHcJTHfHljBIPxa7HDthoa0FQQg5L6C?= =?us-ascii?Q?giwEzdlvr4w0lc7IRa/ugFCUwVohifqj3TeZ7ea6etVKlc+IrWC6UOOVW19z?= =?us-ascii?Q?AXdx6PwTle1ZvHQB9tf3Y6Bca/rOWOxcbzN7HxhamiHRS5vh+VuQOImCMN1h?= =?us-ascii?Q?5N1Jk7vqe2bY9IDf0yLFvo55zna62oJmfFJkVirK1lycmtBoutpgdnL8Rodh?= =?us-ascii?Q?fYcWSUeGnu8RH4/SlLcWQyXq7B3fYDilwWREqg555DavrEbW/CPxJfsryI44?= =?us-ascii?Q?RcK8IQgi9OTEh6ABpiBud4DN4+tlJ+t1?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700013)(376014)(7416014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Dec 2024 10:57:44.8361 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: de85b411-cd99-41cf-2525-08dd16adfac7 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B371.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB7501 X-ZohoMail-DKIM: pass (identity @amd.com) X-ZM-MESSAGEID: 1733569109580116600 Content-Type: text/plain; charset="utf-8" To implement passthrough dGPU prime in guest, virtio-gpu need to check p2pdma_distance of two GPUs. This adds a new command for guest to pass virtual pci notations of two pci devices to host and send xen privcmd to calculate physical p2pdma_distance. Signed-off-by: Julia Zhang --- hw/display/virtio-gpu-virgl.c | 47 +++++++++++++++++++++ hw/i386/xen/xen-hvm.c | 6 +++ include/hw/virtio/virtio-gpu-bswap.h | 12 ++++++ include/hw/xen/xen.h | 3 ++ include/standard-headers/linux/virtio_gpu.h | 19 +++++++++ 5 files changed, 87 insertions(+) diff --git a/hw/display/virtio-gpu-virgl.c b/hw/display/virtio-gpu-virgl.c index 07faeb1834..eb9b193ade 100644 --- a/hw/display/virtio-gpu-virgl.c +++ b/hw/display/virtio-gpu-virgl.c @@ -16,6 +16,12 @@ #include "qemu/iov.h" #include "trace.h" #include "hw/virtio/virtio.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_bus.h" +#include "hw/virtio/virtio-pci.h" +#include "hw/virtio/virtio-bus.h" +#include "hw/xen/xen.h" + #include "hw/virtio/virtio-gpu.h" #include "hw/virtio/virtio-gpu-bswap.h" #include "hw/virtio/virtio-gpu-pixman.h" @@ -188,6 +194,44 @@ virtio_gpu_virgl_unmap_resource_blob(VirtIOGPU *g, =20 return 0; } + +static void virgl_cmd_p2pdma_distance(VirtIOGPU *g, + struct virtio_gpu_ctrl_command *cmd) +{ + struct virtio_gpu_device_p2pdma_distance cmd_p; + struct virtio_gpu_resp_distance resp; + PCIDevice *client =3D NULL, *provider =3D NULL; + int ret; + + VIRTIO_GPU_FILL_CMD(cmd_p); + virtio_gpu_p2pdma_distance_bswap(&cmd_p); + + ret =3D pci_qdev_get_device(cmd_p.provider_bus, cmd_p.provider_slot, c= md_p.provider_func, &provider); + + if (ret) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: virgl get physical device error: = %s\n", + __func__, strerror(-ret)); + cmd->error =3D VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; + return; + } + + ret =3D pci_qdev_get_device(cmd_p.client_bus, cmd_p.client_slot, cmd_p= .client_func, &client); + if (ret) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: virgl get physical device error: = %s\n", + __func__, strerror(-ret)); + cmd->error =3D VIRTIO_GPU_RESP_ERR_INVALID_PARAMETER; + return; + } + + int distance =3D xen_p2pdma_distance(provider->hostaddr.bus, provider-= >hostaddr.slot, + provider->hostaddr.function,client->hostaddr.bus, + client->hostaddr.slot, client->hostaddr.function); + + memset(&resp, 0, sizeof(resp)); + resp.hdr.type =3D VIRTIO_GPU_RESP_OK_P2PDMA_DISTANCE; + resp.distance =3D distance; + virtio_gpu_ctrl_response(g, cmd, &resp.hdr, sizeof(resp)); +} #endif =20 static void virgl_cmd_create_resource_2d(VirtIOGPU *g, @@ -913,6 +957,9 @@ void virtio_gpu_virgl_process_cmd(VirtIOGPU *g, case VIRTIO_GPU_CMD_SUBMIT_3D: virgl_cmd_submit_3d(g, cmd); break; + case VIRTIO_GPU_CMD_P2PDMA_DISTANCE: + virgl_cmd_p2pdma_distance(g, cmd); + break; case VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D: virgl_cmd_transfer_to_host_2d(g, cmd); break; diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c index d3df488c48..c8dd27dad7 100644 --- a/hw/i386/xen/xen-hvm.c +++ b/hw/i386/xen/xen-hvm.c @@ -604,6 +604,12 @@ static bool xen_check_stubdomain(struct xs_handle *xsh) return is_stubdom; } =20 +int xen_p2pdma_distance(uint32_t bus, uint32_t slot, uint32_t func, + uint32_t c_bus, uint32_t c_slot, uint32_t c_func) +{ + return xc_physdev_p2pdma_distance(xen_xc, bus, slot, func, c_bus, c_slot,= c_func); +} + void xen_hvm_init_pc(PCMachineState *pcms, MemoryRegion **ram_memory) { MachineState *ms =3D MACHINE(pcms); diff --git a/include/hw/virtio/virtio-gpu-bswap.h b/include/hw/virtio/virti= o-gpu-bswap.h index dd1975e2d4..b5c0c0adcd 100644 --- a/include/hw/virtio/virtio-gpu-bswap.h +++ b/include/hw/virtio/virtio-gpu-bswap.h @@ -78,6 +78,18 @@ virtio_gpu_map_blob_bswap(struct virtio_gpu_resource_map= _blob *mblob) le64_to_cpus(&mblob->offset); } =20 +static inline void +virtio_gpu_p2pdma_distance_bswap(struct virtio_gpu_device_p2pdma_distance = *p2p_dist) +{ + virtio_gpu_ctrl_hdr_bswap(&p2p_dist->hdr); + le32_to_cpus(&p2p_dist->provider_bus); + le32_to_cpus(&p2p_dist->provider_slot); + le32_to_cpus(&p2p_dist->provider_func); + le32_to_cpus(&p2p_dist->client_bus); + le32_to_cpus(&p2p_dist->client_bus); + le32_to_cpus(&p2p_dist->client_bus); +} + static inline void virtio_gpu_unmap_blob_bswap(struct virtio_gpu_resource_unmap_blob *ublob) { diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h index ecb89ecfc1..fe1d628327 100644 --- a/include/hw/xen/xen.h +++ b/include/hw/xen/xen.h @@ -48,4 +48,7 @@ qemu_irq *xen_interrupt_controller_init(void); =20 void xen_register_framebuffer(struct MemoryRegion *mr); =20 +int xen_p2pdma_distance(uint32_t bus, uint32_t slot, uint32_t func, + uint32_t c_bus, uint32_t c_slot, uint32_t c_func); + #endif /* QEMU_HW_XEN_H */ diff --git a/include/standard-headers/linux/virtio_gpu.h b/include/standard= -headers/linux/virtio_gpu.h index 6459fdb9fb..2e55dcc2fe 100644 --- a/include/standard-headers/linux/virtio_gpu.h +++ b/include/standard-headers/linux/virtio_gpu.h @@ -95,6 +95,7 @@ enum virtio_gpu_ctrl_type { VIRTIO_GPU_CMD_SUBMIT_3D, VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB, VIRTIO_GPU_CMD_RESOURCE_UNMAP_BLOB, + VIRTIO_GPU_CMD_P2PDMA_DISTANCE, =20 /* cursor commands */ VIRTIO_GPU_CMD_UPDATE_CURSOR =3D 0x0300, @@ -108,6 +109,7 @@ enum virtio_gpu_ctrl_type { VIRTIO_GPU_RESP_OK_EDID, VIRTIO_GPU_RESP_OK_RESOURCE_UUID, VIRTIO_GPU_RESP_OK_MAP_INFO, + VIRTIO_GPU_RESP_OK_P2PDMA_DISTANCE, =20 /* error responses */ VIRTIO_GPU_RESP_ERR_UNSPEC =3D 0x1200, @@ -429,6 +431,23 @@ struct virtio_gpu_set_scanout_blob { uint32_t offsets[4]; }; =20 +/* VIRTIO_GPU_CMD_P2PDMA_DISTANCE */ +struct virtio_gpu_device_p2pdma_distance { + struct virtio_gpu_ctrl_hdr hdr; + __le32 provider_bus; + __le32 provider_slot; + __le32 provider_func; + __le32 client_bus; + __le32 client_slot; + __le32 client_func; +}; + +/* VIRTIO_GPU_RESP_DISTANCE */ +struct virtio_gpu_resp_distance { + struct virtio_gpu_ctrl_hdr hdr; + __le32 distance; +}; + /* VIRTIO_GPU_CMD_RESOURCE_MAP_BLOB */ struct virtio_gpu_resource_map_blob { struct virtio_gpu_ctrl_hdr hdr; --=20 2.34.1