drivers/net/ethernet/qlogic/qed/qed_sriov.h

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015 QLogic Corporation
   3  *
   4  * This software is available under the terms of the GNU General Public License
   5  * (GPL) Version 2, available from the file COPYING in the main directory of
   6  * this source tree.
   7  */
   8
   9 #ifndef _QED_SRIOV_H
  10 #define _QED_SRIOV_H
  11 #include <linux/types.h>
  12 #include "qed_vf.h"
  13
  14 #define QED_ETH_VF_NUM_MAC_FILTERS 1
  15 #define QED_ETH_VF_NUM_VLAN_FILTERS 2
  16 #define QED_VF_ARRAY_LENGTH (3)
  17
  18 #ifdef CONFIG_QED_SRIOV
  19 #define IS_VF(cdev)             ((cdev)->b_is_vf)
  20 #define IS_PF(cdev)             (!((cdev)->b_is_vf))
  21 #define IS_PF_SRIOV(p_hwfn)     (!!((p_hwfn)->cdev->p_iov_info))
  22 #else
  23 #define IS_VF(cdev)             (0)
  24 #define IS_PF(cdev)             (1)
  25 #define IS_PF_SRIOV(p_hwfn)     (0)
  26 #endif
  27 #define IS_PF_SRIOV_ALLOC(p_hwfn)       (!!((p_hwfn)->pf_iov_info))
  28
  29 #define QED_MAX_VF_CHAINS_PER_PF 16
  30
  31 #define QED_ETH_MAX_VF_NUM_VLAN_FILTERS \
  32         (MAX_NUM_VFS * QED_ETH_VF_NUM_VLAN_FILTERS)
  33
  34 enum qed_iov_vport_update_flag {
  35         QED_IOV_VP_UPDATE_ACTIVATE,
  36         QED_IOV_VP_UPDATE_VLAN_STRIP,
  37         QED_IOV_VP_UPDATE_TX_SWITCH,
  38         QED_IOV_VP_UPDATE_MCAST,
  39         QED_IOV_VP_UPDATE_ACCEPT_PARAM,
  40         QED_IOV_VP_UPDATE_RSS,
  41         QED_IOV_VP_UPDATE_ACCEPT_ANY_VLAN,
  42         QED_IOV_VP_UPDATE_SGE_TPA,
  43         QED_IOV_VP_UPDATE_MAX,
  44 };
  45
  46 struct qed_public_vf_info {
  47         /* These copies will later be reflected in the bulletin board,
  48          * but this copy should be newer.
  49          */
  50         u8 forced_mac[ETH_ALEN];
  51         u16 forced_vlan;
  52         u8 mac[ETH_ALEN];
  53
  54         /* IFLA_VF_LINK_STATE_<X> */
  55         int link_state;
  56
  57         /* Currently configured Tx rate in MB/sec. 0 if unconfigured */
  58         int tx_rate;
  59 };
  60
  61 /* This struct is part of qed_dev and contains data relevant to all hwfns;
  62  * Initialized only if SR-IOV cpabability is exposed in PCIe config space.
  63  */
  64 struct qed_hw_sriov_info {
  65         int pos;                /* capability position */
  66         int nres;               /* number of resources */
  67         u32 cap;                /* SR-IOV Capabilities */
  68         u16 ctrl;               /* SR-IOV Control */
  69         u16 total_vfs;          /* total VFs associated with the PF */
  70         u16 num_vfs;            /* number of vfs that have been started */
  71         u16 initial_vfs;        /* initial VFs associated with the PF */
  72         u16 nr_virtfn;          /* number of VFs available */
  73         u16 offset;             /* first VF Routing ID offset */
  74         u16 stride;             /* following VF stride */
  75         u16 vf_device_id;       /* VF device id */
  76         u32 pgsz;               /* page size for BAR alignment */
  77         u8 link;                /* Function Dependency Link */
  78
  79         u32 first_vf_in_pf;
  80 };
  81
  82 /* This mailbox is maintained per VF in its PF contains all information
  83  * required for sending / receiving a message.
  84  */
  85 struct qed_iov_vf_mbx {
  86         union vfpf_tlvs *req_virt;
  87         dma_addr_t req_phys;
  88         union pfvf_tlvs *reply_virt;
  89         dma_addr_t reply_phys;
  90
  91         /* Address in VF where a pending message is located */
  92         dma_addr_t pending_req;
  93
  94         u8 *offset;
  95
  96         /* saved VF request header */
  97         struct vfpf_first_tlv first_tlv;
  98 };
  99
 100 struct qed_vf_q_info {
 101         u16 fw_rx_qid;
 102         u16 fw_tx_qid;
 103         u8 fw_cid;
 104         u8 rxq_active;
 105         u8 txq_active;
 106 };
 107
 108 enum vf_state {
 109         VF_FREE = 0,            /* VF ready to be acquired holds no resc */
 110         VF_ACQUIRED,            /* VF, acquired, but not initalized */
 111         VF_ENABLED,             /* VF, Enabled */
 112         VF_RESET,               /* VF, FLR'd, pending cleanup */
 113         VF_STOPPED              /* VF, Stopped */
 114 };
 115
 116 struct qed_vf_vlan_shadow {
 117         bool used;
 118         u16 vid;
 119 };
 120
 121 struct qed_vf_shadow_config {
 122         /* Shadow copy of all guest vlans */
 123         struct qed_vf_vlan_shadow vlans[QED_ETH_VF_NUM_VLAN_FILTERS + 1];
 124
 125         /* Shadow copy of all configured MACs; Empty if forcing MACs */
 126         u8 macs[QED_ETH_VF_NUM_MAC_FILTERS][ETH_ALEN];
 127         u8 inner_vlan_removal;
 128 };
 129
 130 /* PFs maintain an array of this structure, per VF */
 131 struct qed_vf_info {
 132         struct qed_iov_vf_mbx vf_mbx;
 133         enum vf_state state;
 134         bool b_init;
 135         u8 to_disable;
 136
 137         struct qed_bulletin bulletin;
 138         dma_addr_t vf_bulletin;
 139
 140         /* PF saves a copy of the last VF acquire message */
 141         struct vfpf_acquire_tlv acquire;
 142
 143         u32 concrete_fid;
 144         u16 opaque_fid;
 145         u16 mtu;
 146
 147         u8 vport_id;
 148         u8 relative_vf_id;
 149         u8 abs_vf_id;
 150 #define QED_VF_ABS_ID(p_hwfn, p_vf)     (QED_PATH_ID(p_hwfn) ?                \
 151                                          (p_vf)->abs_vf_id + MAX_NUM_VFS_BB : \
 152                                          (p_vf)->abs_vf_id)
 153
 154         u8 vport_instance;
 155         u8 num_rxqs;
 156         u8 num_txqs;
 157
 158         u8 num_sbs;
 159
 160         u8 num_mac_filters;
 161         u8 num_vlan_filters;
 162         struct qed_vf_q_info vf_queues[QED_MAX_VF_CHAINS_PER_PF];
 163         u16 igu_sbs[QED_MAX_VF_CHAINS_PER_PF];
 164         u8 num_active_rxqs;
 165         struct qed_public_vf_info p_vf_info;
 166         bool spoof_chk;
 167         bool req_spoofchk_val;
 168
 169         /* Stores the configuration requested by VF */
 170         struct qed_vf_shadow_config shadow_config;
 171
 172         /* A bitfield using bulletin's valid-map bits, used to indicate
 173          * which of the bulletin board features have been configured.
 174          */
 175         u64 configured_features;
 176 #define QED_IOV_CONFIGURED_FEATURES_MASK        ((1 << MAC_ADDR_FORCED) | \
 177                                                  (1 << VLAN_ADDR_FORCED))
 178 };
 179
 180 /* This structure is part of qed_hwfn and used only for PFs that have sriov
 181  * capability enabled.
 182  */
 183 struct qed_pf_iov {
 184         struct qed_vf_info vfs_array[MAX_NUM_VFS];
 185         u64 pending_events[QED_VF_ARRAY_LENGTH];
 186         u64 pending_flr[QED_VF_ARRAY_LENGTH];
 187
 188         /* Allocate message address continuosuly and split to each VF */
 189         void *mbx_msg_virt_addr;
 190         dma_addr_t mbx_msg_phys_addr;
 191         u32 mbx_msg_size;
 192         void *mbx_reply_virt_addr;
 193         dma_addr_t mbx_reply_phys_addr;
 194         u32 mbx_reply_size;
 195         void *p_bulletins;
 196         dma_addr_t bulletins_phys;
 197         u32 bulletins_size;
 198 };
 199
 200 enum qed_iov_wq_flag {
 201         QED_IOV_WQ_MSG_FLAG,
 202         QED_IOV_WQ_SET_UNICAST_FILTER_FLAG,
 203         QED_IOV_WQ_BULLETIN_UPDATE_FLAG,
 204         QED_IOV_WQ_STOP_WQ_FLAG,
 205         QED_IOV_WQ_FLR_FLAG,
 206 };
 207
 208 #ifdef CONFIG_QED_SRIOV
 209 /**
 210  * @brief - Given a VF index, return index of next [including that] active VF.
 211  *
 212  * @param p_hwfn
 213  * @param rel_vf_id
 214  *
 215  * @return MAX_NUM_VFS in case no further active VFs, otherwise index.
 216  */
 217 u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn, u16 rel_vf_id);
 218
 219 /**
 220  * @brief Read sriov related information and allocated resources
 221  *  reads from configuraiton space, shmem, etc.
 222  *
 223  * @param p_hwfn
 224  *
 225  * @return int
 226  */
 227 int qed_iov_hw_info(struct qed_hwfn *p_hwfn);
 228
 229 /**
 230  * @brief qed_add_tlv - place a given tlv on the tlv buffer at next offset
 231  *
 232  * @param p_hwfn
 233  * @param p_iov
 234  * @param type
 235  * @param length
 236  *
 237  * @return pointer to the newly placed tlv
 238  */
 239 void *qed_add_tlv(struct qed_hwfn *p_hwfn, u8 **offset, u16 type, u16 length);
 240
 241 /**
 242  * @brief list the types and lengths of the tlvs on the buffer
 243  *
 244  * @param p_hwfn
 245  * @param tlvs_list
 246  */
 247 void qed_dp_tlv_list(struct qed_hwfn *p_hwfn, void *tlvs_list);
 248
 249 /**
 250  * @brief qed_iov_alloc - allocate sriov related resources
 251  *
 252  * @param p_hwfn
 253  *
 254  * @return int
 255  */
 256 int qed_iov_alloc(struct qed_hwfn *p_hwfn);
 257
 258 /**
 259  * @brief qed_iov_setup - setup sriov related resources
 260  *
 261  * @param p_hwfn
 262  * @param p_ptt
 263  */
 264 void qed_iov_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 265
 266 /**
 267  * @brief qed_iov_free - free sriov related resources
 268  *
 269  * @param p_hwfn
 270  */
 271 void qed_iov_free(struct qed_hwfn *p_hwfn);
 272
 273 /**
 274  * @brief free sriov related memory that was allocated during hw_prepare
 275  *
 276  * @param cdev
 277  */
 278 void qed_iov_free_hw_info(struct qed_dev *cdev);
 279
 280 /**
 281  * @brief qed_sriov_eqe_event - handle async sriov event arrived on eqe.
 282  *
 283  * @param p_hwfn
 284  * @param opcode
 285  * @param echo
 286  * @param data
 287  */
 288 int qed_sriov_eqe_event(struct qed_hwfn *p_hwfn,
 289                         u8 opcode, __le16 echo, union event_ring_data *data);
 290
 291 /**
 292  * @brief Mark structs of vfs that have been FLR-ed.
 293  *
 294  * @param p_hwfn
 295  * @param disabled_vfs - bitmask of all VFs on path that were FLRed
 296  *
 297  * @return 1 iff one of the PF's vfs got FLRed. 0 otherwise.
 298  */
 299 int qed_iov_mark_vf_flr(struct qed_hwfn *p_hwfn, u32 *disabled_vfs);
 300
 301 /**
 302  * @brief Search extended TLVs in request/reply buffer.
 303  *
 304  * @param p_hwfn
 305  * @param p_tlvs_list - Pointer to tlvs list
 306  * @param req_type - Type of TLV
 307  *
 308  * @return pointer to tlv type if found, otherwise returns NULL.
 309  */
 310 void *qed_iov_search_list_tlvs(struct qed_hwfn *p_hwfn,
 311                                void *p_tlvs_list, u16 req_type);
 312
 313 void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first);
 314 int qed_iov_wq_start(struct qed_dev *cdev);
 315
 316 void qed_schedule_iov(struct qed_hwfn *hwfn, enum qed_iov_wq_flag flag);
 317 void qed_vf_start_iov_wq(struct qed_dev *cdev);
 318 int qed_sriov_disable(struct qed_dev *cdev, bool pci_enabled);
 319 void qed_inform_vf_link_state(struct qed_hwfn *hwfn);
 320 #else
 321 static inline u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn,
 322                                              u16 rel_vf_id)
 323 {
 324         return MAX_NUM_VFS;
 325 }
 326
 327 static inline int qed_iov_hw_info(struct qed_hwfn *p_hwfn)
 328 {
 329         return 0;
 330 }
 331
 332 static inline int qed_iov_alloc(struct qed_hwfn *p_hwfn)
 333 {
 334         return 0;
 335 }
 336
 337 static inline void qed_iov_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 338 {
 339 }
 340
 341 static inline void qed_iov_free(struct qed_hwfn *p_hwfn)
 342 {
 343 }
 344
 345 static inline void qed_iov_free_hw_info(struct qed_dev *cdev)
 346 {
 347 }
 348
 349 static inline int qed_sriov_eqe_event(struct qed_hwfn *p_hwfn,
 350                                       u8 opcode,
 351                                       __le16 echo, union event_ring_data *data)
 352 {
 353         return -EINVAL;
 354 }
 355
 356 static inline int qed_iov_mark_vf_flr(struct qed_hwfn *p_hwfn,
 357                                       u32 *disabled_vfs)
 358 {
 359         return 0;
 360 }
 361
 362 static inline void qed_iov_wq_stop(struct qed_dev *cdev, bool schedule_first)
 363 {
 364 }
 365
 366 static inline int qed_iov_wq_start(struct qed_dev *cdev)
 367 {
 368         return 0;
 369 }
 370
 371 static inline void qed_schedule_iov(struct qed_hwfn *hwfn,
 372                                     enum qed_iov_wq_flag flag)
 373 {
 374 }
 375
 376 static inline void qed_vf_start_iov_wq(struct qed_dev *cdev)
 377 {
 378 }
 379
 380 static inline int qed_sriov_disable(struct qed_dev *cdev, bool pci_enabled)
 381 {
 382         return 0;
 383 }
 384
 385 static inline void qed_inform_vf_link_state(struct qed_hwfn *hwfn)
 386 {
 387 }
 388 #endif
 389
 390 #define qed_for_each_vf(_p_hwfn, _i)                      \
 391         for (_i = qed_iov_get_next_active_vf(_p_hwfn, 0); \
 392              _i < MAX_NUM_VFS;                            \
 393              _i = qed_iov_get_next_active_vf(_p_hwfn, _i + 1))
 394
 395 #endif