include/linux/qed/qed_ll2_if.h

   1 /* QLogic qed NIC Driver
   2  * Copyright (c) 2015-2017  QLogic Corporation
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and /or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #ifndef _QED_LL2_IF_H
  34 #define _QED_LL2_IF_H
  35
  36 #include <linux/types.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/pci.h>
  40 #include <linux/skbuff.h>
  41 #include <linux/version.h>
  42 #include <linux/kernel.h>
  43 #include <linux/slab.h>
  44 #include <linux/qed/qed_if.h>
  45
  46 enum qed_ll2_conn_type {
  47         QED_LL2_TYPE_FCOE,
  48         QED_LL2_TYPE_ISCSI,
  49         QED_LL2_TYPE_TEST,
  50         QED_LL2_TYPE_OOO,
  51         QED_LL2_TYPE_RESERVED2,
  52         QED_LL2_TYPE_ROCE,
  53         QED_LL2_TYPE_IWARP,
  54         QED_LL2_TYPE_RESERVED3,
  55         MAX_QED_LL2_RX_CONN_TYPE
  56 };
  57
  58 enum qed_ll2_roce_flavor_type {
  59         QED_LL2_ROCE,
  60         QED_LL2_RROCE,
  61         MAX_QED_LL2_ROCE_FLAVOR_TYPE
  62 };
  63
  64 enum qed_ll2_tx_dest {
  65         QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
  66         QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
  67         QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
  68         QED_LL2_TX_DEST_MAX
  69 };
  70
  71 enum qed_ll2_error_handle {
  72         QED_LL2_DROP_PACKET,
  73         QED_LL2_DO_NOTHING,
  74         QED_LL2_ASSERT,
  75 };
  76
  77 struct qed_ll2_stats {
  78         u64 gsi_invalid_hdr;
  79         u64 gsi_invalid_pkt_length;
  80         u64 gsi_unsupported_pkt_typ;
  81         u64 gsi_crcchksm_error;
  82
  83         u64 packet_too_big_discard;
  84         u64 no_buff_discard;
  85
  86         u64 rcv_ucast_bytes;
  87         u64 rcv_mcast_bytes;
  88         u64 rcv_bcast_bytes;
  89         u64 rcv_ucast_pkts;
  90         u64 rcv_mcast_pkts;
  91         u64 rcv_bcast_pkts;
  92
  93         u64 sent_ucast_bytes;
  94         u64 sent_mcast_bytes;
  95         u64 sent_bcast_bytes;
  96         u64 sent_ucast_pkts;
  97         u64 sent_mcast_pkts;
  98         u64 sent_bcast_pkts;
  99 };
 100
 101 struct qed_ll2_comp_rx_data {
 102         void *cookie;
 103         dma_addr_t rx_buf_addr;
 104         u16 parse_flags;
 105         u16 err_flags;
 106         u16 vlan;
 107         bool b_last_packet;
 108         u8 connection_handle;
 109
 110         union {
 111                 u16 packet_length;
 112                 u16 data_length;
 113         } length;
 114
 115         u32 opaque_data_0;
 116         u32 opaque_data_1;
 117
 118         /* GSI only */
 119         u32 src_qp;
 120         u16 qp_id;
 121
 122         union {
 123                 u8 placement_offset;
 124                 u8 data_length_error;
 125         } u;
 126 };
 127
 128 typedef
 129 void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
 130                                       struct qed_ll2_comp_rx_data *data);
 131
 132 typedef
 133 void (*qed_ll2_release_rx_packet_cb)(void *cxt,
 134                                      u8 connection_handle,
 135                                      void *cookie,
 136                                      dma_addr_t rx_buf_addr,
 137                                      bool b_last_packet);
 138
 139 typedef
 140 void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
 141                                       u8 connection_handle,
 142                                       void *cookie,
 143                                       dma_addr_t first_frag_addr,
 144                                       bool b_last_fragment,
 145                                       bool b_last_packet);
 146
 147 typedef
 148 void (*qed_ll2_release_tx_packet_cb)(void *cxt,
 149                                      u8 connection_handle,
 150                                      void *cookie,
 151                                      dma_addr_t first_frag_addr,
 152                                      bool b_last_fragment, bool b_last_packet);
 153
 154 typedef
 155 void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle,
 156                             u32 opaque_data_0, u32 opaque_data_1);
 157
 158 struct qed_ll2_cbs {
 159         qed_ll2_complete_rx_packet_cb rx_comp_cb;
 160         qed_ll2_release_rx_packet_cb rx_release_cb;
 161         qed_ll2_complete_tx_packet_cb tx_comp_cb;
 162         qed_ll2_release_tx_packet_cb tx_release_cb;
 163         qed_ll2_slowpath_cb slowpath_cb;
 164         void *cookie;
 165 };
 166
 167 struct qed_ll2_acquire_data_inputs {
 168         enum qed_ll2_conn_type conn_type;
 169         u16 mtu;
 170         u16 rx_num_desc;
 171         u16 rx_num_ooo_buffers;
 172         u8 rx_drop_ttl0_flg;
 173         u8 rx_vlan_removal_en;
 174         u16 tx_num_desc;
 175         u8 tx_max_bds_per_packet;
 176         u8 tx_tc;
 177         enum qed_ll2_tx_dest tx_dest;
 178         enum qed_ll2_error_handle ai_err_packet_too_big;
 179         enum qed_ll2_error_handle ai_err_no_buf;
 180         bool secondary_queue;
 181         u8 gsi_enable;
 182 };
 183
 184 struct qed_ll2_acquire_data {
 185         struct qed_ll2_acquire_data_inputs input;
 186         const struct qed_ll2_cbs *cbs;
 187
 188         /* Output container for LL2 connection's handle */
 189         u8 *p_connection_handle;
 190 };
 191
 192 struct qed_ll2_tx_pkt_info {
 193         void *cookie;
 194         dma_addr_t first_frag;
 195         enum qed_ll2_tx_dest tx_dest;
 196         enum qed_ll2_roce_flavor_type qed_roce_flavor;
 197         u16 vlan;
 198         u16 l4_hdr_offset_w;    /* from start of packet */
 199         u16 first_frag_len;
 200         u8 num_of_bds;
 201         u8 bd_flags;
 202         bool enable_ip_cksum;
 203         bool enable_l4_cksum;
 204         bool calc_ip_len;
 205 };
 206
 207 #define QED_LL2_UNUSED_HANDLE   (0xff)
 208
 209 struct qed_ll2_cb_ops {
 210         int (*rx_cb)(void *, struct sk_buff *, u32, u32);
 211         int (*tx_cb)(void *, struct sk_buff *, bool);
 212 };
 213
 214 struct qed_ll2_params {
 215         u16 mtu;
 216         bool drop_ttl0_packets;
 217         bool rx_vlan_stripping;
 218         u8 tx_tc;
 219         bool frags_mapped;
 220         u8 ll2_mac_address[ETH_ALEN];
 221 };
 222
 223 struct qed_ll2_ops {
 224 /**
 225  * @brief start - initializes ll2
 226  *
 227  * @param cdev
 228  * @param params - protocol driver configuration for the ll2.
 229  *
 230  * @return 0 on success, otherwise error value.
 231  */
 232         int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
 233
 234 /**
 235  * @brief stop - stops the ll2
 236  *
 237  * @param cdev
 238  *
 239  * @return 0 on success, otherwise error value.
 240  */
 241         int (*stop)(struct qed_dev *cdev);
 242
 243 /**
 244  * @brief start_xmit - transmits an skb over the ll2 interface
 245  *
 246  * @param cdev
 247  * @param skb
 248  *
 249  * @return 0 on success, otherwise error value.
 250  */
 251         int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb);
 252
 253 /**
 254  * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
 255  * packets. Should be called before `start'.
 256  *
 257  * @param cdev
 258  * @param cookie - to be passed to the callback functions.
 259  * @param ops - the callback functions to register for Rx / Tx.
 260  *
 261  * @return 0 on success, otherwise error value.
 262  */
 263         void (*register_cb_ops)(struct qed_dev *cdev,
 264                                 const struct qed_ll2_cb_ops *ops,
 265                                 void *cookie);
 266
 267 /**
 268  * @brief get LL2 related statistics
 269  *
 270  * @param cdev
 271  * @param stats - pointer to struct that would be filled with stats
 272  *
 273  * @return 0 on success, error otherwise.
 274  */
 275         int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
 276 };
 277
 278 #ifdef CONFIG_QED_LL2
 279 int qed_ll2_alloc_if(struct qed_dev *);
 280 void qed_ll2_dealloc_if(struct qed_dev *);
 281 #else
 282 static const struct qed_ll2_ops qed_ll2_ops_pass = {
 283         .start = NULL,
 284         .stop = NULL,
 285         .start_xmit = NULL,
 286         .register_cb_ops = NULL,
 287         .get_stats = NULL,
 288 };
 289
 290 static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
 291 {
 292         return 0;
 293 }
 294
 295 static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)
 296 {
 297 }
 298 #endif
 299 #endif