drivers/net/ethernet/qlogic/qed/qed_iwarp.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 #ifndef _QED_IWARP_H
  33 #define _QED_IWARP_H
  34
  35 enum qed_iwarp_qp_state {
  36         QED_IWARP_QP_STATE_IDLE,
  37         QED_IWARP_QP_STATE_RTS,
  38         QED_IWARP_QP_STATE_TERMINATE,
  39         QED_IWARP_QP_STATE_CLOSING,
  40         QED_IWARP_QP_STATE_ERROR,
  41 };
  42
  43 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state);
  44
  45 #define QED_IWARP_PREALLOC_CNT  (256)
  46
  47 #define QED_IWARP_LL2_SYN_TX_SIZE       (128)
  48 #define QED_IWARP_LL2_SYN_RX_SIZE       (256)
  49 #define QED_IWARP_MAX_SYN_PKT_SIZE      (128)
  50
  51 #define QED_IWARP_LL2_OOO_DEF_TX_SIZE   (256)
  52 #define QED_IWARP_MAX_OOO               (16)
  53 #define QED_IWARP_LL2_OOO_MAX_RX_SIZE   (16384)
  54
  55 #define QED_IWARP_HANDLE_INVAL          (0xff)
  56
  57 struct qed_iwarp_ll2_buff {
  58         struct qed_iwarp_ll2_buff *piggy_buf;
  59         void *data;
  60         dma_addr_t data_phys_addr;
  61         u32 buff_size;
  62 };
  63
  64 struct qed_iwarp_ll2_mpa_buf {
  65         struct list_head list_entry;
  66         struct qed_iwarp_ll2_buff *ll2_buf;
  67         struct unaligned_opaque_data data;
  68         u16 tcp_payload_len;
  69         u8 placement_offset;
  70 };
  71
  72 /* In some cases a fpdu will arrive with only one byte of the header, in this
  73  * case the fpdu_length will be partial (contain only higher byte and
  74  * incomplete bytes will contain the invalid value
  75  */
  76 #define QED_IWARP_INVALID_INCOMPLETE_BYTES 0xffff
  77
  78 struct qed_iwarp_fpdu {
  79         struct qed_iwarp_ll2_buff *mpa_buf;
  80         void *mpa_frag_virt;
  81         dma_addr_t mpa_frag;
  82         dma_addr_t pkt_hdr;
  83         u16 mpa_frag_len;
  84         u16 fpdu_length;
  85         u16 incomplete_bytes;
  86         u8 pkt_hdr_size;
  87 };
  88
  89 struct qed_iwarp_info {
  90         struct list_head listen_list;   /* qed_iwarp_listener */
  91         struct list_head ep_list;       /* qed_iwarp_ep */
  92         struct list_head ep_free_list;  /* pre-allocated ep's */
  93         struct list_head mpa_buf_list;  /* list of mpa_bufs */
  94         struct list_head mpa_buf_pending_list;
  95         spinlock_t iw_lock;     /* for iwarp resources */
  96         spinlock_t qp_lock;     /* for teardown races */
  97         u32 rcv_wnd_scale;
  98         u16 max_mtu;
  99         u8 mac_addr[ETH_ALEN];
 100         u8 crc_needed;
 101         u8 tcp_flags;
 102         u8 ll2_syn_handle;
 103         u8 ll2_ooo_handle;
 104         u8 ll2_mpa_handle;
 105         u8 peer2peer;
 106         enum mpa_negotiation_mode mpa_rev;
 107         enum mpa_rtr_type rtr_type;
 108         struct qed_iwarp_fpdu *partial_fpdus;
 109         struct qed_iwarp_ll2_mpa_buf *mpa_bufs;
 110         u8 *mpa_intermediate_buf;
 111         u16 max_num_partial_fpdus;
 112 };
 113
 114 enum qed_iwarp_ep_state {
 115         QED_IWARP_EP_INIT,
 116         QED_IWARP_EP_MPA_REQ_RCVD,
 117         QED_IWARP_EP_MPA_OFFLOADED,
 118         QED_IWARP_EP_ESTABLISHED,
 119         QED_IWARP_EP_CLOSED
 120 };
 121
 122 union async_output {
 123         struct iwarp_eqe_data_mpa_async_completion mpa_response;
 124         struct iwarp_eqe_data_tcp_async_completion mpa_request;
 125 };
 126
 127 #define QED_MAX_PRIV_DATA_LEN (512)
 128 struct qed_iwarp_ep_memory {
 129         u8 in_pdata[QED_MAX_PRIV_DATA_LEN];
 130         u8 out_pdata[QED_MAX_PRIV_DATA_LEN];
 131         union async_output async_output;
 132 };
 133
 134 /* Endpoint structure represents a TCP connection. This connection can be
 135  * associated with a QP or not (in which case QP==NULL)
 136  */
 137 struct qed_iwarp_ep {
 138         struct list_head list_entry;
 139         struct qed_rdma_qp *qp;
 140         struct qed_iwarp_ep_memory *ep_buffer_virt;
 141         dma_addr_t ep_buffer_phys;
 142         enum qed_iwarp_ep_state state;
 143         int sig;
 144         struct qed_iwarp_cm_info cm_info;
 145         enum tcp_connect_mode connect_mode;
 146         enum mpa_rtr_type rtr_type;
 147         enum mpa_negotiation_mode mpa_rev;
 148         u32 tcp_cid;
 149         u32 cid;
 150         u16 mss;
 151         u8 remote_mac_addr[6];
 152         u8 local_mac_addr[6];
 153         bool mpa_reply_processed;
 154
 155         /* For Passive side - syn packet related data */
 156         u16 syn_ip_payload_length;
 157         struct qed_iwarp_ll2_buff *syn;
 158         dma_addr_t syn_phy_addr;
 159
 160         /* The event_cb function is called for asynchrounous events associated
 161          * with the ep. It is initialized at different entry points depending
 162          * on whether the ep is the tcp connection active side or passive side
 163          * The cb_context is passed to the event_cb function.
 164          */
 165         iwarp_event_handler event_cb;
 166         void *cb_context;
 167 };
 168
 169 struct qed_iwarp_listener {
 170         struct list_head list_entry;
 171
 172         /* The event_cb function is called for connection requests.
 173          * The cb_context is passed to the event_cb function.
 174          */
 175         iwarp_event_handler event_cb;
 176         void *cb_context;
 177         u32 max_backlog;
 178         u32 ip_addr[4];
 179         u16 port;
 180         u16 vlan;
 181         u8 ip_version;
 182 };
 183
 184 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn);
 185
 186 int qed_iwarp_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt,
 187                     struct qed_rdma_start_in_params *params);
 188
 189 void qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
 190                               struct iwarp_init_func_params *p_ramrod);
 191
 192 int qed_iwarp_stop(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 193
 194 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn);
 195
 196 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn);
 197
 198 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
 199
 200 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
 201                         struct qed_rdma_qp *qp,
 202                         struct qed_rdma_create_qp_out_params *out_params);
 203
 204 int qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp,
 205                         enum qed_iwarp_qp_state new_state, bool internal);
 206
 207 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
 208
 209 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
 210
 211 void qed_iwarp_query_qp(struct qed_rdma_qp *qp,
 212                         struct qed_rdma_query_qp_out_params *out_params);
 213
 214 int
 215 qed_iwarp_connect(void *rdma_cxt,
 216                   struct qed_iwarp_connect_in *iparams,
 217                   struct qed_iwarp_connect_out *oparams);
 218
 219 int
 220 qed_iwarp_create_listen(void *rdma_cxt,
 221                         struct qed_iwarp_listen_in *iparams,
 222                         struct qed_iwarp_listen_out *oparams);
 223
 224 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams);
 225
 226 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams);
 227 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle);
 228
 229 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams);
 230
 231 #endif