Quelle  qed_iwarp.h   Sprache: C

/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
/* QLogic qed NIC Driver
 * Copyright (c) 2015-2017  QLogic Corporation
 * Copyright (c) 2019-2020 Marvell International Ltd.
 */

#ifndef _QED_IWARP_H
#define _QED_IWARP_H

enum qed_iwarp_qp_state {
 QED_IWARP_QP_STATE_IDLE,
 QED_IWARP_QP_STATE_RTS,
 QED_IWARP_QP_STATE_TERMINATE,
 QED_IWARP_QP_STATE_CLOSING,
 QED_IWARP_QP_STATE_ERROR,
};

enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state);

#define QED_IWARP_PREALLOC_CNT  (256)

#define QED_IWARP_LL2_SYN_TX_SIZE       (128)
#define QED_IWARP_LL2_SYN_RX_SIZE       (256)

#define QED_IWARP_LL2_OOO_DEF_TX_SIZE   (256)
#define QED_IWARP_MAX_OOO  (16)
#define QED_IWARP_LL2_OOO_MAX_RX_SIZE   (16384)

#define QED_IWARP_HANDLE_INVAL  (0xff)

struct qed_iwarp_ll2_buff {
 struct qed_iwarp_ll2_buff *piggy_buf;
 void *data;
 dma_addr_t data_phys_addr;
 u32 buff_size;
};

struct qed_iwarp_ll2_mpa_buf {
 struct list_head list_entry;
 struct qed_iwarp_ll2_buff *ll2_buf;
 struct unaligned_opaque_data data;
 u16 tcp_payload_len;
 u8 placement_offset;
};

/* In some cases a fpdu will arrive with only one byte of the header, in this
 * case the fpdu_length will be partial (contain only higher byte and
 * incomplete bytes will contain the invalid value
 */
#define QED_IWARP_INVALID_INCOMPLETE_BYTES 0xffff

struct qed_iwarp_fpdu {
 struct qed_iwarp_ll2_buff *mpa_buf;
 void *mpa_frag_virt;
 dma_addr_t mpa_frag;
 dma_addr_t pkt_hdr;
 u16 mpa_frag_len;
 u16 fpdu_length;
 u16 incomplete_bytes;
 u8 pkt_hdr_size;
};

struct qed_iwarp_info {
 struct list_head listen_list; /* qed_iwarp_listener */
 struct list_head ep_list; /* qed_iwarp_ep */
 struct list_head ep_free_list; /* pre-allocated ep's */
 struct list_head mpa_buf_list; /* list of mpa_bufs */
 struct list_head mpa_buf_pending_list;
 spinlock_t iw_lock; /* for iwarp resources */
 spinlock_t qp_lock; /* for teardown races */
 u32 rcv_wnd_scale;
 u16 rcv_wnd_size;
 u16 max_mtu;
 u8 mac_addr[ETH_ALEN];
 u8 crc_needed;
 u8 tcp_flags;
 u8 ll2_syn_handle;
 u8 ll2_ooo_handle;
 u8 ll2_mpa_handle;
 u8 peer2peer;
 enum mpa_negotiation_mode mpa_rev;
 enum mpa_rtr_type rtr_type;
 struct qed_iwarp_fpdu *partial_fpdus;
 struct qed_iwarp_ll2_mpa_buf *mpa_bufs;
 u8 *mpa_intermediate_buf;
 u16 max_num_partial_fpdus;
};

enum qed_iwarp_ep_state {
 QED_IWARP_EP_INIT,
 QED_IWARP_EP_MPA_REQ_RCVD,
 QED_IWARP_EP_MPA_OFFLOADED,
 QED_IWARP_EP_ESTABLISHED,
 QED_IWARP_EP_CLOSED
};

union async_output {
 struct iwarp_eqe_data_mpa_async_completion mpa_response;
 struct iwarp_eqe_data_tcp_async_completion mpa_request;
};

#define QED_MAX_PRIV_DATA_LEN (512)
struct qed_iwarp_ep_memory {
 u8 in_pdata[QED_MAX_PRIV_DATA_LEN];
 u8 out_pdata[QED_MAX_PRIV_DATA_LEN];
 union async_output async_output;
};

/* Endpoint structure represents a TCP connection. This connection can be
 * associated with a QP or not (in which case QP==NULL)
 */
struct qed_iwarp_ep {
 struct list_head list_entry;
 struct qed_rdma_qp *qp;
 struct qed_iwarp_ep_memory *ep_buffer_virt;
 dma_addr_t ep_buffer_phys;
 enum qed_iwarp_ep_state state;
 int sig;
 struct qed_iwarp_cm_info cm_info;
 enum tcp_connect_mode connect_mode;
 enum mpa_rtr_type rtr_type;
 enum mpa_negotiation_mode mpa_rev;
 u32 tcp_cid;
 u32 cid;
 u16 mss;
 u8 remote_mac_addr[6];
 u8 local_mac_addr[6];
 bool mpa_reply_processed;

 /* For Passive side - syn packet related data */
 u16 syn_ip_payload_length;
 struct qed_iwarp_ll2_buff *syn;
 dma_addr_t syn_phy_addr;

 /* The event_cb function is called for asynchrounous events associated
 * with the ep. It is initialized at different entry points depending
 * on whether the ep is the tcp connection active side or passive side
 * The cb_context is passed to the event_cb function.
 */
 iwarp_event_handler event_cb;
 void *cb_context;
};

struct qed_iwarp_listener {
 struct list_head list_entry;

 /* The event_cb function is called for connection requests.
 * The cb_context is passed to the event_cb function.
 */
 iwarp_event_handler event_cb;
 void *cb_context;
 u32 max_backlog;
 u32 ip_addr[4];
 u16 port;
 u16 vlan;
 u8 ip_version;
};

int qed_iwarp_alloc(struct qed_hwfn *p_hwfn);

int qed_iwarp_setup(struct qed_hwfn *p_hwfn,
      struct qed_rdma_start_in_params *params);

void qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
         struct iwarp_init_func_ramrod_data *p_ramrod);

int qed_iwarp_stop(struct qed_hwfn *p_hwfn);

void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn);

void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn);

void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);

int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
   struct qed_rdma_qp *qp,
   struct qed_rdma_create_qp_out_params *out_params);

int qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp,
   enum qed_iwarp_qp_state new_state, bool internal);

int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);

int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);

void qed_iwarp_query_qp(struct qed_rdma_qp *qp,
   struct qed_rdma_query_qp_out_params *out_params);

int
qed_iwarp_connect(void *rdma_cxt,
    struct qed_iwarp_connect_in *iparams,
    struct qed_iwarp_connect_out *oparams);

int
qed_iwarp_create_listen(void *rdma_cxt,
   struct qed_iwarp_listen_in *iparams,
   struct qed_iwarp_listen_out *oparams);

int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams);

int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams);
int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle);

int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams);

#endif