218 lines
6.2 KiB
C
218 lines
6.2 KiB
C
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/* SPDX-License-Identifier: (GPL-2.0 OR MIT)
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* Google virtual Ethernet (gve) driver
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*
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* Copyright (C) 2015-2019 Google, Inc.
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*/
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#ifndef _GVE_ADMINQ_H
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#define _GVE_ADMINQ_H
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#include <linux/build_bug.h>
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/* Admin queue opcodes */
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enum gve_adminq_opcodes {
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GVE_ADMINQ_DESCRIBE_DEVICE = 0x1,
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GVE_ADMINQ_CONFIGURE_DEVICE_RESOURCES = 0x2,
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GVE_ADMINQ_REGISTER_PAGE_LIST = 0x3,
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GVE_ADMINQ_UNREGISTER_PAGE_LIST = 0x4,
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GVE_ADMINQ_CREATE_TX_QUEUE = 0x5,
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GVE_ADMINQ_CREATE_RX_QUEUE = 0x6,
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GVE_ADMINQ_DESTROY_TX_QUEUE = 0x7,
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GVE_ADMINQ_DESTROY_RX_QUEUE = 0x8,
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GVE_ADMINQ_DECONFIGURE_DEVICE_RESOURCES = 0x9,
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GVE_ADMINQ_SET_DRIVER_PARAMETER = 0xB,
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};
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/* Admin queue status codes */
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enum gve_adminq_statuses {
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GVE_ADMINQ_COMMAND_UNSET = 0x0,
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GVE_ADMINQ_COMMAND_PASSED = 0x1,
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GVE_ADMINQ_COMMAND_ERROR_ABORTED = 0xFFFFFFF0,
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GVE_ADMINQ_COMMAND_ERROR_ALREADY_EXISTS = 0xFFFFFFF1,
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GVE_ADMINQ_COMMAND_ERROR_CANCELLED = 0xFFFFFFF2,
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GVE_ADMINQ_COMMAND_ERROR_DATALOSS = 0xFFFFFFF3,
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GVE_ADMINQ_COMMAND_ERROR_DEADLINE_EXCEEDED = 0xFFFFFFF4,
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GVE_ADMINQ_COMMAND_ERROR_FAILED_PRECONDITION = 0xFFFFFFF5,
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GVE_ADMINQ_COMMAND_ERROR_INTERNAL_ERROR = 0xFFFFFFF6,
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GVE_ADMINQ_COMMAND_ERROR_INVALID_ARGUMENT = 0xFFFFFFF7,
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GVE_ADMINQ_COMMAND_ERROR_NOT_FOUND = 0xFFFFFFF8,
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GVE_ADMINQ_COMMAND_ERROR_OUT_OF_RANGE = 0xFFFFFFF9,
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GVE_ADMINQ_COMMAND_ERROR_PERMISSION_DENIED = 0xFFFFFFFA,
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GVE_ADMINQ_COMMAND_ERROR_UNAUTHENTICATED = 0xFFFFFFFB,
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GVE_ADMINQ_COMMAND_ERROR_RESOURCE_EXHAUSTED = 0xFFFFFFFC,
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GVE_ADMINQ_COMMAND_ERROR_UNAVAILABLE = 0xFFFFFFFD,
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GVE_ADMINQ_COMMAND_ERROR_UNIMPLEMENTED = 0xFFFFFFFE,
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GVE_ADMINQ_COMMAND_ERROR_UNKNOWN_ERROR = 0xFFFFFFFF,
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};
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#define GVE_ADMINQ_DEVICE_DESCRIPTOR_VERSION 1
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/* All AdminQ command structs should be naturally packed. The static_assert
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* calls make sure this is the case at compile time.
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*/
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struct gve_adminq_describe_device {
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__be64 device_descriptor_addr;
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__be32 device_descriptor_version;
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__be32 available_length;
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};
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static_assert(sizeof(struct gve_adminq_describe_device) == 16);
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struct gve_device_descriptor {
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__be64 max_registered_pages;
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__be16 reserved1;
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__be16 tx_queue_entries;
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__be16 rx_queue_entries;
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__be16 default_num_queues;
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__be16 mtu;
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__be16 counters;
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__be16 tx_pages_per_qpl;
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__be16 rx_pages_per_qpl;
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u8 mac[ETH_ALEN];
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__be16 num_device_options;
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__be16 total_length;
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u8 reserved2[6];
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};
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static_assert(sizeof(struct gve_device_descriptor) == 40);
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struct device_option {
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__be32 option_id;
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__be32 option_length;
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};
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static_assert(sizeof(struct device_option) == 8);
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struct gve_adminq_configure_device_resources {
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__be64 counter_array;
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__be64 irq_db_addr;
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__be32 num_counters;
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__be32 num_irq_dbs;
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__be32 irq_db_stride;
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__be32 ntfy_blk_msix_base_idx;
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};
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static_assert(sizeof(struct gve_adminq_configure_device_resources) == 32);
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struct gve_adminq_register_page_list {
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__be32 page_list_id;
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__be32 num_pages;
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__be64 page_address_list_addr;
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};
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static_assert(sizeof(struct gve_adminq_register_page_list) == 16);
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struct gve_adminq_unregister_page_list {
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__be32 page_list_id;
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};
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static_assert(sizeof(struct gve_adminq_unregister_page_list) == 4);
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struct gve_adminq_create_tx_queue {
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__be32 queue_id;
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__be32 reserved;
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__be64 queue_resources_addr;
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__be64 tx_ring_addr;
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__be32 queue_page_list_id;
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__be32 ntfy_id;
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};
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static_assert(sizeof(struct gve_adminq_create_tx_queue) == 32);
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struct gve_adminq_create_rx_queue {
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__be32 queue_id;
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__be32 index;
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__be32 reserved;
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__be32 ntfy_id;
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__be64 queue_resources_addr;
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__be64 rx_desc_ring_addr;
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__be64 rx_data_ring_addr;
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__be32 queue_page_list_id;
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u8 padding[4];
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};
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static_assert(sizeof(struct gve_adminq_create_rx_queue) == 48);
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/* Queue resources that are shared with the device */
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struct gve_queue_resources {
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union {
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struct {
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__be32 db_index; /* Device -> Guest */
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__be32 counter_index; /* Device -> Guest */
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};
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u8 reserved[64];
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};
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};
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static_assert(sizeof(struct gve_queue_resources) == 64);
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struct gve_adminq_destroy_tx_queue {
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__be32 queue_id;
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};
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static_assert(sizeof(struct gve_adminq_destroy_tx_queue) == 4);
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struct gve_adminq_destroy_rx_queue {
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__be32 queue_id;
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};
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static_assert(sizeof(struct gve_adminq_destroy_rx_queue) == 4);
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/* GVE Set Driver Parameter Types */
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enum gve_set_driver_param_types {
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GVE_SET_PARAM_MTU = 0x1,
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};
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struct gve_adminq_set_driver_parameter {
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__be32 parameter_type;
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u8 reserved[4];
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__be64 parameter_value;
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};
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static_assert(sizeof(struct gve_adminq_set_driver_parameter) == 16);
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union gve_adminq_command {
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struct {
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__be32 opcode;
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__be32 status;
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union {
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struct gve_adminq_configure_device_resources
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configure_device_resources;
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struct gve_adminq_create_tx_queue create_tx_queue;
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struct gve_adminq_create_rx_queue create_rx_queue;
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struct gve_adminq_destroy_tx_queue destroy_tx_queue;
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struct gve_adminq_destroy_rx_queue destroy_rx_queue;
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struct gve_adminq_describe_device describe_device;
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struct gve_adminq_register_page_list reg_page_list;
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struct gve_adminq_unregister_page_list unreg_page_list;
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struct gve_adminq_set_driver_parameter set_driver_param;
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};
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};
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u8 reserved[64];
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};
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static_assert(sizeof(union gve_adminq_command) == 64);
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int gve_adminq_alloc(struct device *dev, struct gve_priv *priv);
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void gve_adminq_free(struct device *dev, struct gve_priv *priv);
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void gve_adminq_release(struct gve_priv *priv);
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int gve_adminq_execute_cmd(struct gve_priv *priv,
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union gve_adminq_command *cmd_orig);
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int gve_adminq_describe_device(struct gve_priv *priv);
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int gve_adminq_configure_device_resources(struct gve_priv *priv,
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dma_addr_t counter_array_bus_addr,
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u32 num_counters,
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dma_addr_t db_array_bus_addr,
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u32 num_ntfy_blks);
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int gve_adminq_deconfigure_device_resources(struct gve_priv *priv);
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int gve_adminq_create_tx_queue(struct gve_priv *priv, u32 queue_id);
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int gve_adminq_destroy_tx_queue(struct gve_priv *priv, u32 queue_id);
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int gve_adminq_create_rx_queue(struct gve_priv *priv, u32 queue_id);
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int gve_adminq_destroy_rx_queue(struct gve_priv *priv, u32 queue_id);
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int gve_adminq_register_page_list(struct gve_priv *priv,
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struct gve_queue_page_list *qpl);
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int gve_adminq_unregister_page_list(struct gve_priv *priv, u32 page_list_id);
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int gve_adminq_set_mtu(struct gve_priv *priv, u64 mtu);
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#endif /* _GVE_ADMINQ_H */
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