drivers/net/ethernet/cisco/enic/enic.h

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #ifndef _ENIC_H_
  21 #define _ENIC_H_
  22
  23 #include "vnic_enet.h"
  24 #include "vnic_dev.h"
  25 #include "vnic_wq.h"
  26 #include "vnic_rq.h"
  27 #include "vnic_cq.h"
  28 #include "vnic_intr.h"
  29 #include "vnic_stats.h"
  30 #include "vnic_nic.h"
  31 #include "vnic_rss.h"
  32 #include <linux/irq.h>
  33
  34 #define DRV_NAME                "enic"
  35 #define DRV_DESCRIPTION         "Cisco VIC Ethernet NIC Driver"
  36
  37 #define ENIC_BARS_MAX           6
  38
  39 #define ENIC_WQ_MAX             8
  40 #define ENIC_RQ_MAX             8
  41 #define ENIC_CQ_MAX             (ENIC_WQ_MAX + ENIC_RQ_MAX)
  42 #define ENIC_INTR_MAX           (ENIC_CQ_MAX + 2)
  43
  44 #define ENIC_WQ_NAPI_BUDGET     256
  45
  46 #define ENIC_AIC_LARGE_PKT_DIFF 3
  47
  48 struct enic_msix_entry {
  49         int requested;
  50         char devname[IFNAMSIZ + 8];
  51         irqreturn_t (*isr)(int, void *);
  52         void *devid;
  53         cpumask_var_t affinity_mask;
  54 };
  55
  56 /* Store only the lower range.  Higher range is given by fw. */
  57 struct enic_intr_mod_range {
  58         u32 small_pkt_range_start;
  59         u32 large_pkt_range_start;
  60 };
  61
  62 struct enic_intr_mod_table {
  63         u32 rx_rate;
  64         u32 range_percent;
  65 };
  66
  67 #define ENIC_MAX_LINK_SPEEDS            3
  68 #define ENIC_LINK_SPEED_10G             10000
  69 #define ENIC_LINK_SPEED_4G              4000
  70 #define ENIC_LINK_40G_INDEX             2
  71 #define ENIC_LINK_10G_INDEX             1
  72 #define ENIC_LINK_4G_INDEX              0
  73 #define ENIC_RX_COALESCE_RANGE_END      125
  74 #define ENIC_AIC_TS_BREAK               100
  75
  76 struct enic_rx_coal {
  77         u32 small_pkt_range_start;
  78         u32 large_pkt_range_start;
  79         u32 range_end;
  80         u32 use_adaptive_rx_coalesce;
  81 };
  82
  83 /* priv_flags */
  84 #define ENIC_SRIOV_ENABLED              (1 << 0)
  85
  86 /* enic port profile set flags */
  87 #define ENIC_PORT_REQUEST_APPLIED       (1 << 0)
  88 #define ENIC_SET_REQUEST                (1 << 1)
  89 #define ENIC_SET_NAME                   (1 << 2)
  90 #define ENIC_SET_INSTANCE               (1 << 3)
  91 #define ENIC_SET_HOST                   (1 << 4)
  92
  93 struct enic_port_profile {
  94         u32 set;
  95         u8 request;
  96         char name[PORT_PROFILE_MAX];
  97         u8 instance_uuid[PORT_UUID_MAX];
  98         u8 host_uuid[PORT_UUID_MAX];
  99         u8 vf_mac[ETH_ALEN];
 100         u8 mac_addr[ETH_ALEN];
 101 };
 102
 103 /* enic_rfs_fltr_node - rfs filter node in hash table
 104  *      @@keys: IPv4 5 tuple
 105  *      @flow_id: flow_id of clsf filter provided by kernel
 106  *      @fltr_id: filter id of clsf filter returned by adaptor
 107  *      @rq_id: desired rq index
 108  *      @node: hlist_node
 109  */
 110 struct enic_rfs_fltr_node {
 111         struct flow_keys keys;
 112         u32 flow_id;
 113         u16 fltr_id;
 114         u16 rq_id;
 115         struct hlist_node node;
 116 };
 117
 118 /* enic_rfs_flw_tbl - rfs flow table
 119  *      @max: Maximum number of filters vNIC supports
 120  *      @free: Number of free filters available
 121  *      @toclean: hash table index to clean next
 122  *      @ht_head: hash table list head
 123  *      @lock: spin lock
 124  *      @rfs_may_expire: timer function for enic_rps_may_expire_flow
 125  */
 126 struct enic_rfs_flw_tbl {
 127         u16 max;
 128         int free;
 129
 130 #define ENIC_RFS_FLW_BITSHIFT   (10)
 131 #define ENIC_RFS_FLW_MASK       ((1 << ENIC_RFS_FLW_BITSHIFT) - 1)
 132         u16 toclean:ENIC_RFS_FLW_BITSHIFT;
 133         struct hlist_head ht_head[1 << ENIC_RFS_FLW_BITSHIFT];
 134         spinlock_t lock;
 135         struct timer_list rfs_may_expire;
 136 };
 137
 138 struct vxlan_offload {
 139         u16 vxlan_udp_port_number;
 140         u8 patch_level;
 141         u8 flags;
 142 };
 143
 144 /* Per-instance private data structure */
 145 struct enic {
 146         struct net_device *netdev;
 147         struct pci_dev *pdev;
 148         struct vnic_enet_config config;
 149         struct vnic_dev_bar bar[ENIC_BARS_MAX];
 150         struct vnic_dev *vdev;
 151         struct timer_list notify_timer;
 152         struct work_struct reset;
 153         struct work_struct tx_hang_reset;
 154         struct work_struct change_mtu_work;
 155         struct msix_entry msix_entry[ENIC_INTR_MAX];
 156         struct enic_msix_entry msix[ENIC_INTR_MAX];
 157         u32 msg_enable;
 158         spinlock_t devcmd_lock;
 159         u8 mac_addr[ETH_ALEN];
 160         unsigned int flags;
 161         unsigned int priv_flags;
 162         unsigned int mc_count;
 163         unsigned int uc_count;
 164         u32 port_mtu;
 165         struct enic_rx_coal rx_coalesce_setting;
 166         u32 rx_coalesce_usecs;
 167         u32 tx_coalesce_usecs;
 168 #ifdef CONFIG_PCI_IOV
 169         u16 num_vfs;
 170 #endif
 171         spinlock_t enic_api_lock;
 172         bool enic_api_busy;
 173         struct enic_port_profile *pp;
 174
 175         /* work queue cache line section */
 176         ____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
 177         spinlock_t wq_lock[ENIC_WQ_MAX];
 178         unsigned int wq_count;
 179         u16 loop_enable;
 180         u16 loop_tag;
 181
 182         /* receive queue cache line section */
 183         ____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
 184         unsigned int rq_count;
 185         struct vxlan_offload vxlan;
 186         u64 rq_truncated_pkts;
 187         u64 rq_bad_fcs;
 188         struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];
 189
 190         /* interrupt resource cache line section */
 191         ____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];
 192         unsigned int intr_count;
 193         u32 __iomem *legacy_pba;                /* memory-mapped */
 194
 195         /* completion queue cache line section */
 196         ____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
 197         unsigned int cq_count;
 198         struct enic_rfs_flw_tbl rfs_h;
 199         u32 rx_copybreak;
 200         u8 rss_key[ENIC_RSS_LEN];
 201         struct vnic_gen_stats gen_stats;
 202 };
 203
 204 static inline struct net_device *vnic_get_netdev(struct vnic_dev *vdev)
 205 {
 206         struct enic *enic = vdev->priv;
 207
 208         return enic->netdev;
 209 }
 210
 211 /* wrappers function for kernel log
 212  */
 213 #define vdev_err(vdev, fmt, ...)                                        \
 214         dev_err(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
 215 #define vdev_warn(vdev, fmt, ...)                                       \
 216         dev_warn(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
 217 #define vdev_info(vdev, fmt, ...)                                       \
 218         dev_info(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
 219
 220 #define vdev_neterr(vdev, fmt, ...)                                     \
 221         netdev_err(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
 222 #define vdev_netwarn(vdev, fmt, ...)                                    \
 223         netdev_warn(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
 224 #define vdev_netinfo(vdev, fmt, ...)                                    \
 225         netdev_info(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
 226
 227 static inline struct device *enic_get_dev(struct enic *enic)
 228 {
 229         return &(enic->pdev->dev);
 230 }
 231
 232 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 233 {
 234         return rq;
 235 }
 236
 237 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 238 {
 239         return enic->rq_count + wq;
 240 }
 241
 242 static inline unsigned int enic_legacy_io_intr(void)
 243 {
 244         return 0;
 245 }
 246
 247 static inline unsigned int enic_legacy_err_intr(void)
 248 {
 249         return 1;
 250 }
 251
 252 static inline unsigned int enic_legacy_notify_intr(void)
 253 {
 254         return 2;
 255 }
 256
 257 static inline unsigned int enic_msix_rq_intr(struct enic *enic,
 258         unsigned int rq)
 259 {
 260         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 261 }
 262
 263 static inline unsigned int enic_msix_wq_intr(struct enic *enic,
 264         unsigned int wq)
 265 {
 266         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 267 }
 268
 269 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 270 {
 271         return enic->rq_count + enic->wq_count;
 272 }
 273
 274 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 275 {
 276         return enic->rq_count + enic->wq_count + 1;
 277 }
 278
 279 static inline bool enic_is_err_intr(struct enic *enic, int intr)
 280 {
 281         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 282         case VNIC_DEV_INTR_MODE_INTX:
 283                 return intr == enic_legacy_err_intr();
 284         case VNIC_DEV_INTR_MODE_MSIX:
 285                 return intr == enic_msix_err_intr(enic);
 286         case VNIC_DEV_INTR_MODE_MSI:
 287         default:
 288                 return false;
 289         }
 290 }
 291
 292 static inline bool enic_is_notify_intr(struct enic *enic, int intr)
 293 {
 294         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 295         case VNIC_DEV_INTR_MODE_INTX:
 296                 return intr == enic_legacy_notify_intr();
 297         case VNIC_DEV_INTR_MODE_MSIX:
 298                 return intr == enic_msix_notify_intr(enic);
 299         case VNIC_DEV_INTR_MODE_MSI:
 300         default:
 301                 return false;
 302         }
 303 }
 304
 305 static inline int enic_dma_map_check(struct enic *enic, dma_addr_t dma_addr)
 306 {
 307         if (unlikely(pci_dma_mapping_error(enic->pdev, dma_addr))) {
 308                 net_warn_ratelimited("%s: PCI dma mapping failed!\n",
 309                                      enic->netdev->name);
 310                 enic->gen_stats.dma_map_error++;
 311
 312                 return -ENOMEM;
 313         }
 314
 315         return 0;
 316 }
 317
 318 void enic_reset_addr_lists(struct enic *enic);
 319 int enic_sriov_enabled(struct enic *enic);
 320 int enic_is_valid_vf(struct enic *enic, int vf);
 321 int enic_is_dynamic(struct enic *enic);
 322 void enic_set_ethtool_ops(struct net_device *netdev);
 323 int __enic_set_rsskey(struct enic *enic);
 324
 325 #endif /* _ENIC_H_ */