drivers/net/ethernet/google/gve/gve_adminq.h

   1 /* SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2  * Google virtual Ethernet (gve) driver
   3  *
   4  * Copyright (C) 2015-2019 Google, Inc.
   5  */
   6
   7 #ifndef _GVE_ADMINQ_H
   8 #define _GVE_ADMINQ_H
   9
  10 #include <linux/build_bug.h>
  11
  12 /* Admin queue opcodes */
  13 enum gve_adminq_opcodes {
  14         GVE_ADMINQ_DESCRIBE_DEVICE              = 0x1,
  15         GVE_ADMINQ_CONFIGURE_DEVICE_RESOURCES   = 0x2,
  16         GVE_ADMINQ_REGISTER_PAGE_LIST           = 0x3,
  17         GVE_ADMINQ_UNREGISTER_PAGE_LIST         = 0x4,
  18         GVE_ADMINQ_CREATE_TX_QUEUE              = 0x5,
  19         GVE_ADMINQ_CREATE_RX_QUEUE              = 0x6,
  20         GVE_ADMINQ_DESTROY_TX_QUEUE             = 0x7,
  21         GVE_ADMINQ_DESTROY_RX_QUEUE             = 0x8,
  22         GVE_ADMINQ_DECONFIGURE_DEVICE_RESOURCES = 0x9,
  23         GVE_ADMINQ_SET_DRIVER_PARAMETER         = 0xB,
  24         GVE_ADMINQ_REPORT_STATS                 = 0xC,
  25         GVE_ADMINQ_REPORT_LINK_SPEED    = 0xD
  26 };
  27
  28 /* Admin queue status codes */
  29 enum gve_adminq_statuses {
  30         GVE_ADMINQ_COMMAND_UNSET                        = 0x0,
  31         GVE_ADMINQ_COMMAND_PASSED                       = 0x1,
  32         GVE_ADMINQ_COMMAND_ERROR_ABORTED                = 0xFFFFFFF0,
  33         GVE_ADMINQ_COMMAND_ERROR_ALREADY_EXISTS         = 0xFFFFFFF1,
  34         GVE_ADMINQ_COMMAND_ERROR_CANCELLED              = 0xFFFFFFF2,
  35         GVE_ADMINQ_COMMAND_ERROR_DATALOSS               = 0xFFFFFFF3,
  36         GVE_ADMINQ_COMMAND_ERROR_DEADLINE_EXCEEDED      = 0xFFFFFFF4,
  37         GVE_ADMINQ_COMMAND_ERROR_FAILED_PRECONDITION    = 0xFFFFFFF5,
  38         GVE_ADMINQ_COMMAND_ERROR_INTERNAL_ERROR         = 0xFFFFFFF6,
  39         GVE_ADMINQ_COMMAND_ERROR_INVALID_ARGUMENT       = 0xFFFFFFF7,
  40         GVE_ADMINQ_COMMAND_ERROR_NOT_FOUND              = 0xFFFFFFF8,
  41         GVE_ADMINQ_COMMAND_ERROR_OUT_OF_RANGE           = 0xFFFFFFF9,
  42         GVE_ADMINQ_COMMAND_ERROR_PERMISSION_DENIED      = 0xFFFFFFFA,
  43         GVE_ADMINQ_COMMAND_ERROR_UNAUTHENTICATED        = 0xFFFFFFFB,
  44         GVE_ADMINQ_COMMAND_ERROR_RESOURCE_EXHAUSTED     = 0xFFFFFFFC,
  45         GVE_ADMINQ_COMMAND_ERROR_UNAVAILABLE            = 0xFFFFFFFD,
  46         GVE_ADMINQ_COMMAND_ERROR_UNIMPLEMENTED          = 0xFFFFFFFE,
  47         GVE_ADMINQ_COMMAND_ERROR_UNKNOWN_ERROR          = 0xFFFFFFFF,
  48 };
  49
  50 #define GVE_ADMINQ_DEVICE_DESCRIPTOR_VERSION 1
  51
  52 /* All AdminQ command structs should be naturally packed. The static_assert
  53  * calls make sure this is the case at compile time.
  54  */
  55
  56 struct gve_adminq_describe_device {
  57         __be64 device_descriptor_addr;
  58         __be32 device_descriptor_version;
  59         __be32 available_length;
  60 };
  61
  62 static_assert(sizeof(struct gve_adminq_describe_device) == 16);
  63
  64 struct gve_device_descriptor {
  65         __be64 max_registered_pages;
  66         __be16 reserved1;
  67         __be16 tx_queue_entries;
  68         __be16 rx_queue_entries;
  69         __be16 default_num_queues;
  70         __be16 mtu;
  71         __be16 counters;
  72         __be16 tx_pages_per_qpl;
  73         __be16 rx_pages_per_qpl;
  74         u8  mac[ETH_ALEN];
  75         __be16 num_device_options;
  76         __be16 total_length;
  77         u8  reserved2[6];
  78 };
  79
  80 static_assert(sizeof(struct gve_device_descriptor) == 40);
  81
  82 struct gve_device_option {
  83         __be16 option_id;
  84         __be16 option_length;
  85         __be32 feat_mask;
  86 };
  87
  88 static_assert(sizeof(struct gve_device_option) == 8);
  89
  90 #define GVE_DEV_OPT_ID_RAW_ADDRESSING 0x1
  91 #define GVE_DEV_OPT_LEN_RAW_ADDRESSING 0x0
  92 #define GVE_DEV_OPT_FEAT_MASK_RAW_ADDRESSING 0x0
  93
  94 struct gve_adminq_configure_device_resources {
  95         __be64 counter_array;
  96         __be64 irq_db_addr;
  97         __be32 num_counters;
  98         __be32 num_irq_dbs;
  99         __be32 irq_db_stride;
 100         __be32 ntfy_blk_msix_base_idx;
 101 };
 102
 103 static_assert(sizeof(struct gve_adminq_configure_device_resources) == 32);
 104
 105 struct gve_adminq_register_page_list {
 106         __be32 page_list_id;
 107         __be32 num_pages;
 108         __be64 page_address_list_addr;
 109 };
 110
 111 static_assert(sizeof(struct gve_adminq_register_page_list) == 16);
 112
 113 struct gve_adminq_unregister_page_list {
 114         __be32 page_list_id;
 115 };
 116
 117 static_assert(sizeof(struct gve_adminq_unregister_page_list) == 4);
 118
 119 #define GVE_RAW_ADDRESSING_QPL_ID 0xFFFFFFFF
 120
 121 struct gve_adminq_create_tx_queue {
 122         __be32 queue_id;
 123         __be32 reserved;
 124         __be64 queue_resources_addr;
 125         __be64 tx_ring_addr;
 126         __be32 queue_page_list_id;
 127         __be32 ntfy_id;
 128 };
 129
 130 static_assert(sizeof(struct gve_adminq_create_tx_queue) == 32);
 131
 132 struct gve_adminq_create_rx_queue {
 133         __be32 queue_id;
 134         __be32 index;
 135         __be32 reserved;
 136         __be32 ntfy_id;
 137         __be64 queue_resources_addr;
 138         __be64 rx_desc_ring_addr;
 139         __be64 rx_data_ring_addr;
 140         __be32 queue_page_list_id;
 141         u8 padding[4];
 142 };
 143
 144 static_assert(sizeof(struct gve_adminq_create_rx_queue) == 48);
 145
 146 /* Queue resources that are shared with the device */
 147 struct gve_queue_resources {
 148         union {
 149                 struct {
 150                         __be32 db_index;        /* Device -> Guest */
 151                         __be32 counter_index;   /* Device -> Guest */
 152                 };
 153                 u8 reserved[64];
 154         };
 155 };
 156
 157 static_assert(sizeof(struct gve_queue_resources) == 64);
 158
 159 struct gve_adminq_destroy_tx_queue {
 160         __be32 queue_id;
 161 };
 162
 163 static_assert(sizeof(struct gve_adminq_destroy_tx_queue) == 4);
 164
 165 struct gve_adminq_destroy_rx_queue {
 166         __be32 queue_id;
 167 };
 168
 169 static_assert(sizeof(struct gve_adminq_destroy_rx_queue) == 4);
 170
 171 /* GVE Set Driver Parameter Types */
 172 enum gve_set_driver_param_types {
 173         GVE_SET_PARAM_MTU       = 0x1,
 174 };
 175
 176 struct gve_adminq_set_driver_parameter {
 177         __be32 parameter_type;
 178         u8 reserved[4];
 179         __be64 parameter_value;
 180 };
 181
 182 static_assert(sizeof(struct gve_adminq_set_driver_parameter) == 16);
 183
 184 struct gve_adminq_report_stats {
 185         __be64 stats_report_len;
 186         __be64 stats_report_addr;
 187         __be64 interval;
 188 };
 189
 190 static_assert(sizeof(struct gve_adminq_report_stats) == 24);
 191
 192 struct gve_adminq_report_link_speed {
 193         __be64 link_speed_address;
 194 };
 195
 196 static_assert(sizeof(struct gve_adminq_report_link_speed) == 8);
 197
 198 struct stats {
 199         __be32 stat_name;
 200         __be32 queue_id;
 201         __be64 value;
 202 };
 203
 204 static_assert(sizeof(struct stats) == 16);
 205
 206 struct gve_stats_report {
 207         __be64 written_count;
 208         struct stats stats[];
 209 };
 210
 211 static_assert(sizeof(struct gve_stats_report) == 8);
 212
 213 enum gve_stat_names {
 214         // stats from gve
 215         TX_WAKE_CNT                     = 1,
 216         TX_STOP_CNT                     = 2,
 217         TX_FRAMES_SENT                  = 3,
 218         TX_BYTES_SENT                   = 4,
 219         TX_LAST_COMPLETION_PROCESSED    = 5,
 220         RX_NEXT_EXPECTED_SEQUENCE       = 6,
 221         RX_BUFFERS_POSTED               = 7,
 222         // stats from NIC
 223         RX_QUEUE_DROP_CNT               = 65,
 224         RX_NO_BUFFERS_POSTED            = 66,
 225         RX_DROPS_PACKET_OVER_MRU        = 67,
 226         RX_DROPS_INVALID_CHECKSUM       = 68,
 227 };
 228
 229 union gve_adminq_command {
 230         struct {
 231                 __be32 opcode;
 232                 __be32 status;
 233                 union {
 234                         struct gve_adminq_configure_device_resources
 235                                                 configure_device_resources;
 236                         struct gve_adminq_create_tx_queue create_tx_queue;
 237                         struct gve_adminq_create_rx_queue create_rx_queue;
 238                         struct gve_adminq_destroy_tx_queue destroy_tx_queue;
 239                         struct gve_adminq_destroy_rx_queue destroy_rx_queue;
 240                         struct gve_adminq_describe_device describe_device;
 241                         struct gve_adminq_register_page_list reg_page_list;
 242                         struct gve_adminq_unregister_page_list unreg_page_list;
 243                         struct gve_adminq_set_driver_parameter set_driver_param;
 244                         struct gve_adminq_report_stats report_stats;
 245                         struct gve_adminq_report_link_speed report_link_speed;
 246                 };
 247         };
 248         u8 reserved[64];
 249 };
 250
 251 static_assert(sizeof(union gve_adminq_command) == 64);
 252
 253 int gve_adminq_alloc(struct device *dev, struct gve_priv *priv);
 254 void gve_adminq_free(struct device *dev, struct gve_priv *priv);
 255 void gve_adminq_release(struct gve_priv *priv);
 256 int gve_adminq_describe_device(struct gve_priv *priv);
 257 int gve_adminq_configure_device_resources(struct gve_priv *priv,
 258                                           dma_addr_t counter_array_bus_addr,
 259                                           u32 num_counters,
 260                                           dma_addr_t db_array_bus_addr,
 261                                           u32 num_ntfy_blks);
 262 int gve_adminq_deconfigure_device_resources(struct gve_priv *priv);
 263 int gve_adminq_create_tx_queues(struct gve_priv *priv, u32 num_queues);
 264 int gve_adminq_destroy_tx_queues(struct gve_priv *priv, u32 queue_id);
 265 int gve_adminq_create_rx_queues(struct gve_priv *priv, u32 num_queues);
 266 int gve_adminq_destroy_rx_queues(struct gve_priv *priv, u32 queue_id);
 267 int gve_adminq_register_page_list(struct gve_priv *priv,
 268                                   struct gve_queue_page_list *qpl);
 269 int gve_adminq_unregister_page_list(struct gve_priv *priv, u32 page_list_id);
 270 int gve_adminq_set_mtu(struct gve_priv *priv, u64 mtu);
 271 int gve_adminq_report_stats(struct gve_priv *priv, u64 stats_report_len,
 272                             dma_addr_t stats_report_addr, u64 interval);
 273 int gve_adminq_report_link_speed(struct gve_priv *priv);
 274 #endif /* _GVE_ADMINQ_H */