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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Subject: [PATCH net-next 02/11] sfc: implement MCDI interface for vDPA operations Date: Wed, 7 Dec 2022 20:24:18 +0530 Message-ID: <20221207145428.31544-3-gautam.dawar@amd.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20221207145428.31544-1-gautam.dawar@amd.com> References: <20221207145428.31544-1-gautam.dawar@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0000E655:EE_|IA1PR12MB6385:EE_ X-MS-Office365-Filtering-Correlation-Id: c98b2e81-f70d-4753-e8a4-08dad863350f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230022)(4636009)(136003)(376002)(396003)(346002)(39860400002)(451199015)(40470700004)(36840700001)(46966006)(36756003)(7416002)(82740400003)(86362001)(81166007)(356005)(5660300002)(8936002)(8676002)(4326008)(2906002)(40460700003)(44832011)(83380400001)(36860700001)(30864003)(478600001)(70206006)(70586007)(316002)(2616005)(110136005)(54906003)(40480700001)(82310400005)(41300700001)(1076003)(336012)(47076005)(426003)(26005)(186003)(2004002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Dec 2022 14:56:22.9162 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c98b2e81-f70d-4753-e8a4-08dad863350f 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0000E655.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6385 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Implement functions to perform vDPA operations like creating and removing virtqueues, getting doorbell register offset etc. using the MCDI interface with FW. Signed-off-by: Gautam Dawar --- drivers/net/ethernet/sfc/Kconfig | 8 + drivers/net/ethernet/sfc/Makefile | 1 + drivers/net/ethernet/sfc/ef100_vdpa.h | 32 +++ drivers/net/ethernet/sfc/mcdi.h | 4 + drivers/net/ethernet/sfc/mcdi_vdpa.c | 268 ++++++++++++++++++++++++++ drivers/net/ethernet/sfc/mcdi_vdpa.h | 84 ++++++++ 6 files changed, 397 insertions(+) create mode 100644 drivers/net/ethernet/sfc/ef100_vdpa.h create mode 100644 drivers/net/ethernet/sfc/mcdi_vdpa.c create mode 100644 drivers/net/ethernet/sfc/mcdi_vdpa.h diff --git a/drivers/net/ethernet/sfc/Kconfig b/drivers/net/ethernet/sfc/Kconfig index 0950e6b0508f..1fa626c87d36 100644 --- a/drivers/net/ethernet/sfc/Kconfig +++ b/drivers/net/ethernet/sfc/Kconfig @@ -63,6 +63,14 @@ config SFC_MCDI_LOGGING Driver-Interface) commands and responses, allowing debugging of driver/firmware interaction. The tracing is actually enabled by a sysfs file 'mcdi_logging' under the PCI device. +config SFC_VDPA + bool "Solarflare EF100-family VDPA support" + depends on SFC && VDPA && SFC_SRIOV + default y + help + This enables support for the virtio data path acceleration (vDPA). + vDPA device's datapath complies with the virtio specification, + but control path is vendor specific. source "drivers/net/ethernet/sfc/falcon/Kconfig" source "drivers/net/ethernet/sfc/siena/Kconfig" diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile index 712a48d00069..059a0944e89a 100644 --- a/drivers/net/ethernet/sfc/Makefile +++ b/drivers/net/ethernet/sfc/Makefile @@ -11,6 +11,7 @@ sfc-$(CONFIG_SFC_MTD) += mtd.o sfc-$(CONFIG_SFC_SRIOV) += sriov.o ef10_sriov.o ef100_sriov.o ef100_rep.o \ mae.o tc.o tc_bindings.o tc_counters.o +sfc-$(CONFIG_SFC_VDPA) += mcdi_vdpa.o obj-$(CONFIG_SFC) += sfc.o obj-$(CONFIG_SFC_FALCON) += falcon/ diff --git a/drivers/net/ethernet/sfc/ef100_vdpa.h b/drivers/net/ethernet/sfc/ef100_vdpa.h new file mode 100644 index 000000000000..f6564448d0c7 --- /dev/null +++ b/drivers/net/ethernet/sfc/ef100_vdpa.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Driver for Xilinx network controllers and boards + * Copyright (C) 2020-2022, Xilinx, Inc. + * Copyright (C) 2022, Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#ifndef __EF100_VDPA_H__ +#define __EF100_VDPA_H__ + +#include +#include +#include "net_driver.h" +#include "ef100_nic.h" + +#if defined(CONFIG_SFC_VDPA) + +enum ef100_vdpa_device_type { + EF100_VDPA_DEVICE_TYPE_NET, +}; + +enum ef100_vdpa_vq_type { + EF100_VDPA_VQ_TYPE_NET_RXQ, + EF100_VDPA_VQ_TYPE_NET_TXQ, + EF100_VDPA_VQ_NTYPES +}; + +#endif /* CONFIG_SFC_VDPA */ +#endif /* __EF100_VDPA_H__ */ diff --git a/drivers/net/ethernet/sfc/mcdi.h b/drivers/net/ethernet/sfc/mcdi.h index 7e35fec9da35..db4ca4975ada 100644 --- a/drivers/net/ethernet/sfc/mcdi.h +++ b/drivers/net/ethernet/sfc/mcdi.h @@ -214,6 +214,10 @@ void efx_mcdi_sensor_event(struct efx_nic *efx, efx_qword_t *ev); #define _MCDI_STRUCT_DWORD(_buf, _field) \ ((_buf) + (_MCDI_CHECK_ALIGN(_field ## _OFST, 4) >> 2)) +#define MCDI_SET_BYTE(_buf, _field, _value) do { \ + BUILD_BUG_ON(MC_CMD_ ## _field ## _LEN != 1); \ + *(u8 *)MCDI_PTR(_buf, _field) = _value; \ + } while (0) #define MCDI_STRUCT_SET_BYTE(_buf, _field, _value) do { \ BUILD_BUG_ON(_field ## _LEN != 1); \ *(u8 *)MCDI_STRUCT_PTR(_buf, _field) = _value; \ diff --git a/drivers/net/ethernet/sfc/mcdi_vdpa.c b/drivers/net/ethernet/sfc/mcdi_vdpa.c new file mode 100644 index 000000000000..35f822170049 --- /dev/null +++ b/drivers/net/ethernet/sfc/mcdi_vdpa.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Driver for Xilinx network controllers and boards + * Copyright (C) 2020-2022, Xilinx, Inc. + * Copyright (C) 2022, Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#include +#include "ef100_vdpa.h" +#include "efx.h" +#include "nic.h" +#include "mcdi_vdpa.h" +#include "mcdi_pcol.h" + +/* The value of target_vf in virtio MC commands like + * virtqueue create, delete and get doorbell offset should + * contain the VF index when the calling function is a PF + * and VF_NULL (0xFFFF) otherwise. As the vDPA driver invokes + * MC commands in context of the VF, it uses VF_NULL. + */ +#define MC_CMD_VIRTIO_TARGET_VF_NULL 0xFFFF + +struct efx_vring_ctx *efx_vdpa_vring_init(struct efx_nic *efx, u32 vi, + enum ef100_vdpa_vq_type vring_type) +{ + struct efx_vring_ctx *vring_ctx; + u32 queue_cmd; + + vring_ctx = kzalloc(sizeof(*vring_ctx), GFP_KERNEL); + if (!vring_ctx) + return ERR_PTR(-ENOMEM); + + switch (vring_type) { + case EF100_VDPA_VQ_TYPE_NET_RXQ: + queue_cmd = MC_CMD_VIRTIO_INIT_QUEUE_REQ_NET_RXQ; + break; + case EF100_VDPA_VQ_TYPE_NET_TXQ: + queue_cmd = MC_CMD_VIRTIO_INIT_QUEUE_REQ_NET_TXQ; + break; + default: + pci_err(efx->pci_dev, + "%s: Invalid Queue type %u\n", __func__, vring_type); + kfree(vring_ctx); + return ERR_PTR(-ENOMEM); + } + + vring_ctx->efx = efx; + vring_ctx->vf_index = MC_CMD_VIRTIO_TARGET_VF_NULL; + vring_ctx->vi_index = vi; + vring_ctx->mcdi_vring_type = queue_cmd; + return vring_ctx; +} + +void efx_vdpa_vring_fini(struct efx_vring_ctx *vring_ctx) +{ + kfree(vring_ctx); +} + +int efx_vdpa_get_features(struct efx_nic *efx, + enum ef100_vdpa_device_type type, + u64 *features) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_VIRTIO_GET_FEATURES_OUT_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_VIRTIO_GET_FEATURES_IN_LEN); + u32 high_val, low_val; + ssize_t outlen; + u32 dev_type; + int rc; + + if (!efx) { + pci_err(efx->pci_dev, "%s: Invalid NIC pointer\n", __func__); + return -EINVAL; + } + switch (type) { + case EF100_VDPA_DEVICE_TYPE_NET: + dev_type = MC_CMD_VIRTIO_GET_FEATURES_IN_NET; + break; + default: + pci_err(efx->pci_dev, + "%s: Device type %d not supported\n", __func__, type); + return -EINVAL; + } + MCDI_SET_DWORD(inbuf, VIRTIO_GET_FEATURES_IN_DEVICE_ID, dev_type); + rc = efx_mcdi_rpc(efx, MC_CMD_VIRTIO_GET_FEATURES, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < MC_CMD_VIRTIO_GET_FEATURES_OUT_LEN) + return -EIO; + low_val = MCDI_DWORD(outbuf, VIRTIO_GET_FEATURES_OUT_FEATURES_LO); + high_val = MCDI_DWORD(outbuf, VIRTIO_GET_FEATURES_OUT_FEATURES_HI); + *features = ((u64)high_val << 32) | low_val; + return 0; +} + +int efx_vdpa_verify_features(struct efx_nic *efx, + enum ef100_vdpa_device_type type, u64 features) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_VIRTIO_TEST_FEATURES_IN_LEN); + u32 dev_type; + int rc; + + BUILD_BUG_ON(MC_CMD_VIRTIO_TEST_FEATURES_OUT_LEN != 0); + switch (type) { + case EF100_VDPA_DEVICE_TYPE_NET: + dev_type = MC_CMD_VIRTIO_GET_FEATURES_IN_NET; + break; + default: + pci_err(efx->pci_dev, + "%s: Device type %d not supported\n", __func__, type); + return -EINVAL; + } + MCDI_SET_DWORD(inbuf, VIRTIO_TEST_FEATURES_IN_DEVICE_ID, dev_type); + MCDI_SET_DWORD(inbuf, VIRTIO_TEST_FEATURES_IN_FEATURES_LO, features); + MCDI_SET_DWORD(inbuf, VIRTIO_TEST_FEATURES_IN_FEATURES_HI, + features >> 32); + rc = efx_mcdi_rpc(efx, MC_CMD_VIRTIO_TEST_FEATURES, inbuf, + sizeof(inbuf), NULL, 0, NULL); + return rc; +} + +int efx_vdpa_vring_create(struct efx_vring_ctx *vring_ctx, + struct efx_vring_cfg *vring_cfg, + struct efx_vring_dyn_cfg *vring_dyn_cfg) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_VIRTIO_INIT_QUEUE_REQ_LEN); + struct efx_nic *efx = vring_ctx->efx; + int rc; + + BUILD_BUG_ON(MC_CMD_VIRTIO_INIT_QUEUE_RESP_LEN != 0); + + MCDI_SET_BYTE(inbuf, VIRTIO_INIT_QUEUE_REQ_QUEUE_TYPE, + vring_ctx->mcdi_vring_type); + MCDI_SET_WORD(inbuf, VIRTIO_INIT_QUEUE_REQ_TARGET_VF, + vring_ctx->vf_index); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_INSTANCE, + vring_ctx->vi_index); + + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_SIZE, vring_cfg->size); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_DESC_TBL_ADDR_LO, + vring_cfg->desc); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_DESC_TBL_ADDR_HI, + vring_cfg->desc >> 32); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_AVAIL_RING_ADDR_LO, + vring_cfg->avail); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_AVAIL_RING_ADDR_HI, + vring_cfg->avail >> 32); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_USED_RING_ADDR_LO, + vring_cfg->used); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_USED_RING_ADDR_HI, + vring_cfg->used >> 32); + MCDI_SET_WORD(inbuf, VIRTIO_INIT_QUEUE_REQ_MSIX_VECTOR, + vring_cfg->msix_vector); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_FEATURES_LO, + vring_cfg->features); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_FEATURES_HI, + vring_cfg->features >> 32); + + if (vring_dyn_cfg) { + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_INITIAL_PIDX, + vring_dyn_cfg->avail_idx); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_INITIAL_CIDX, + vring_dyn_cfg->used_idx); + } + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_MPORT_SELECTOR, + MAE_MPORT_SELECTOR_ASSIGNED); + + rc = efx_mcdi_rpc(efx, MC_CMD_VIRTIO_INIT_QUEUE, inbuf, sizeof(inbuf), + NULL, 0, NULL); + return rc; +} + +int efx_vdpa_vring_destroy(struct efx_vring_ctx *vring_ctx, + struct efx_vring_dyn_cfg *vring_dyn_cfg) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_VIRTIO_FINI_QUEUE_RESP_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_VIRTIO_FINI_QUEUE_REQ_LEN); + struct efx_nic *efx = vring_ctx->efx; + ssize_t outlen; + int rc; + + MCDI_SET_BYTE(inbuf, VIRTIO_FINI_QUEUE_REQ_QUEUE_TYPE, + vring_ctx->mcdi_vring_type); + MCDI_SET_WORD(inbuf, VIRTIO_INIT_QUEUE_REQ_TARGET_VF, + vring_ctx->vf_index); + MCDI_SET_DWORD(inbuf, VIRTIO_INIT_QUEUE_REQ_INSTANCE, + vring_ctx->vi_index); + rc = efx_mcdi_rpc(efx, MC_CMD_VIRTIO_FINI_QUEUE, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + + if (rc) + return rc; + + if (outlen < MC_CMD_VIRTIO_FINI_QUEUE_RESP_LEN) + return -EIO; + + if (vring_dyn_cfg) { + vring_dyn_cfg->avail_idx = MCDI_DWORD(outbuf, + VIRTIO_FINI_QUEUE_RESP_FINAL_PIDX); + vring_dyn_cfg->used_idx = MCDI_DWORD(outbuf, + VIRTIO_FINI_QUEUE_RESP_FINAL_CIDX); + } + + return 0; +} + +int efx_vdpa_get_doorbell_offset(struct efx_vring_ctx *vring_ctx, + u32 *offset) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_VIRTIO_GET_NET_DOORBELL_OFFSET_RESP_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_VIRTIO_GET_DOORBELL_OFFSET_REQ_LEN); + struct efx_nic *efx = vring_ctx->efx; + ssize_t outlen; + int rc; + + if (vring_ctx->mcdi_vring_type != MC_CMD_VIRTIO_INIT_QUEUE_REQ_NET_RXQ && + vring_ctx->mcdi_vring_type != MC_CMD_VIRTIO_INIT_QUEUE_REQ_NET_TXQ) { + pci_err(efx->pci_dev, + "%s: Invalid Queue type %u\n", + __func__, vring_ctx->mcdi_vring_type); + return -EINVAL; + } + + MCDI_SET_BYTE(inbuf, VIRTIO_GET_DOORBELL_OFFSET_REQ_DEVICE_ID, + MC_CMD_VIRTIO_GET_FEATURES_IN_NET); + MCDI_SET_WORD(inbuf, VIRTIO_GET_DOORBELL_OFFSET_REQ_TARGET_VF, + vring_ctx->vf_index); + MCDI_SET_DWORD(inbuf, VIRTIO_GET_DOORBELL_OFFSET_REQ_INSTANCE, + vring_ctx->vi_index); + + rc = efx_mcdi_rpc(efx, MC_CMD_VIRTIO_GET_DOORBELL_OFFSET, inbuf, + sizeof(inbuf), outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + + if (outlen < MC_CMD_VIRTIO_GET_NET_DOORBELL_OFFSET_RESP_LEN) + return -EIO; + if (vring_ctx->mcdi_vring_type == MC_CMD_VIRTIO_INIT_QUEUE_REQ_NET_RXQ) + *offset = MCDI_DWORD(outbuf, + VIRTIO_GET_NET_DOORBELL_OFFSET_RESP_RX_DBL_OFFSET); + else + *offset = MCDI_DWORD(outbuf, + VIRTIO_GET_NET_DOORBELL_OFFSET_RESP_TX_DBL_OFFSET); + + return 0; +} + +int efx_vdpa_get_mtu(struct efx_nic *efx, u16 *mtu) +{ + MCDI_DECLARE_BUF(outbuf, MC_CMD_SET_MAC_V2_OUT_LEN); + MCDI_DECLARE_BUF(inbuf, MC_CMD_SET_MAC_EXT_IN_LEN); + ssize_t outlen; + int rc; + + MCDI_SET_DWORD(inbuf, SET_MAC_EXT_IN_CONTROL, 0); + rc = efx_mcdi_rpc(efx, MC_CMD_SET_MAC, inbuf, sizeof(inbuf), + outbuf, sizeof(outbuf), &outlen); + if (rc) + return rc; + if (outlen < MC_CMD_SET_MAC_V2_OUT_LEN) + return -EIO; + + *mtu = MCDI_DWORD(outbuf, SET_MAC_V2_OUT_MTU); + return 0; +} diff --git a/drivers/net/ethernet/sfc/mcdi_vdpa.h b/drivers/net/ethernet/sfc/mcdi_vdpa.h new file mode 100644 index 000000000000..2a0f7c647c44 --- /dev/null +++ b/drivers/net/ethernet/sfc/mcdi_vdpa.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Driver for Xilinx network controllers and boards + * Copyright (C) 2020-2022, Xilinx, Inc. + * Copyright (C) 2022, Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation, incorporated herein by reference. + */ + +#ifndef EFX_MCDI_VDPA_H +#define EFX_MCDI_VDPA_H + +#if defined(CONFIG_SFC_VDPA) +#include "mcdi.h" + +/** + * struct efx_vring_ctx: The vring context + * + * @efx: pointer of the VF's efx_nic object + * @vf_index: VF index of the vDPA VF + * @vi_index: vi index to be used for queue creation + * @mcdi_vring_type: corresponding MCDI vring type + */ +struct efx_vring_ctx { + struct efx_nic *efx; + u32 vf_index; + u32 vi_index; + u32 mcdi_vring_type; +}; + +/** + * struct efx_vring_cfg: Configuration for vring creation + * + * @desc: Descriptor area address of the vring + * @avail: Available area address of the vring + * @used: Device area address of the vring + * @size: Queue size, in entries. Must be a power of two + * @msix_vector: msix vector address for the queue + * @features: negotiated feature bits + */ +struct efx_vring_cfg { + u64 desc; + u64 avail; + u64 used; + u32 size; + u16 msix_vector; + u64 features; +}; + +/** + * struct efx_vring_dyn_cfg - dynamic vring configuration + * + * @avail_idx: last available index of the vring + * @used_idx: last used index of the vring + */ +struct efx_vring_dyn_cfg { + u32 avail_idx; + u32 used_idx; +}; + +int efx_vdpa_get_features(struct efx_nic *efx, enum ef100_vdpa_device_type type, + u64 *featuresp); + +int efx_vdpa_verify_features(struct efx_nic *efx, + enum ef100_vdpa_device_type type, u64 features); + +struct efx_vring_ctx *efx_vdpa_vring_init(struct efx_nic *efx, u32 vi, + enum ef100_vdpa_vq_type vring_type); + +void efx_vdpa_vring_fini(struct efx_vring_ctx *vring_ctx); + +int efx_vdpa_vring_create(struct efx_vring_ctx *vring_ctx, + struct efx_vring_cfg *vring_cfg, + struct efx_vring_dyn_cfg *vring_dyn_cfg); + +int efx_vdpa_vring_destroy(struct efx_vring_ctx *vring_ctx, + struct efx_vring_dyn_cfg *vring_dyn_cfg); + +int efx_vdpa_get_doorbell_offset(struct efx_vring_ctx *vring_ctx, + u32 *offsetp); +int efx_vdpa_get_mtu(struct efx_nic *efx, u16 *mtu); +#endif +#endif