xref: /linux/drivers/net/ethernet/qlogic/qed/qed_iwarp.h (revision 4b4193256c8d3bc3a5397b5cd9494c2ad386317d)
1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2 /* QLogic qed NIC Driver
3  * Copyright (c) 2015-2017  QLogic Corporation
4  * Copyright (c) 2019-2020 Marvell International Ltd.
5  */
6 
7 #ifndef _QED_IWARP_H
8 #define _QED_IWARP_H
9 
10 enum qed_iwarp_qp_state {
11 	QED_IWARP_QP_STATE_IDLE,
12 	QED_IWARP_QP_STATE_RTS,
13 	QED_IWARP_QP_STATE_TERMINATE,
14 	QED_IWARP_QP_STATE_CLOSING,
15 	QED_IWARP_QP_STATE_ERROR,
16 };
17 
18 enum qed_iwarp_qp_state qed_roce2iwarp_state(enum qed_roce_qp_state state);
19 
20 #define QED_IWARP_PREALLOC_CNT  (256)
21 
22 #define QED_IWARP_LL2_SYN_TX_SIZE       (128)
23 #define QED_IWARP_LL2_SYN_RX_SIZE       (256)
24 
25 #define QED_IWARP_LL2_OOO_DEF_TX_SIZE   (256)
26 #define QED_IWARP_MAX_OOO		(16)
27 #define QED_IWARP_LL2_OOO_MAX_RX_SIZE   (16384)
28 
29 #define QED_IWARP_HANDLE_INVAL		(0xff)
30 
31 struct qed_iwarp_ll2_buff {
32 	struct qed_iwarp_ll2_buff *piggy_buf;
33 	void *data;
34 	dma_addr_t data_phys_addr;
35 	u32 buff_size;
36 };
37 
38 struct qed_iwarp_ll2_mpa_buf {
39 	struct list_head list_entry;
40 	struct qed_iwarp_ll2_buff *ll2_buf;
41 	struct unaligned_opaque_data data;
42 	u16 tcp_payload_len;
43 	u8 placement_offset;
44 };
45 
46 /* In some cases a fpdu will arrive with only one byte of the header, in this
47  * case the fpdu_length will be partial (contain only higher byte and
48  * incomplete bytes will contain the invalid value
49  */
50 #define QED_IWARP_INVALID_INCOMPLETE_BYTES 0xffff
51 
52 struct qed_iwarp_fpdu {
53 	struct qed_iwarp_ll2_buff *mpa_buf;
54 	void *mpa_frag_virt;
55 	dma_addr_t mpa_frag;
56 	dma_addr_t pkt_hdr;
57 	u16 mpa_frag_len;
58 	u16 fpdu_length;
59 	u16 incomplete_bytes;
60 	u8 pkt_hdr_size;
61 };
62 
63 struct qed_iwarp_info {
64 	struct list_head listen_list;	/* qed_iwarp_listener */
65 	struct list_head ep_list;	/* qed_iwarp_ep */
66 	struct list_head ep_free_list;	/* pre-allocated ep's */
67 	struct list_head mpa_buf_list;	/* list of mpa_bufs */
68 	struct list_head mpa_buf_pending_list;
69 	spinlock_t iw_lock;	/* for iwarp resources */
70 	spinlock_t qp_lock;	/* for teardown races */
71 	u32 rcv_wnd_scale;
72 	u16 rcv_wnd_size;
73 	u16 max_mtu;
74 	u8 mac_addr[ETH_ALEN];
75 	u8 crc_needed;
76 	u8 tcp_flags;
77 	u8 ll2_syn_handle;
78 	u8 ll2_ooo_handle;
79 	u8 ll2_mpa_handle;
80 	u8 peer2peer;
81 	enum mpa_negotiation_mode mpa_rev;
82 	enum mpa_rtr_type rtr_type;
83 	struct qed_iwarp_fpdu *partial_fpdus;
84 	struct qed_iwarp_ll2_mpa_buf *mpa_bufs;
85 	u8 *mpa_intermediate_buf;
86 	u16 max_num_partial_fpdus;
87 };
88 
89 enum qed_iwarp_ep_state {
90 	QED_IWARP_EP_INIT,
91 	QED_IWARP_EP_MPA_REQ_RCVD,
92 	QED_IWARP_EP_MPA_OFFLOADED,
93 	QED_IWARP_EP_ESTABLISHED,
94 	QED_IWARP_EP_CLOSED
95 };
96 
97 union async_output {
98 	struct iwarp_eqe_data_mpa_async_completion mpa_response;
99 	struct iwarp_eqe_data_tcp_async_completion mpa_request;
100 };
101 
102 #define QED_MAX_PRIV_DATA_LEN (512)
103 struct qed_iwarp_ep_memory {
104 	u8 in_pdata[QED_MAX_PRIV_DATA_LEN];
105 	u8 out_pdata[QED_MAX_PRIV_DATA_LEN];
106 	union async_output async_output;
107 };
108 
109 /* Endpoint structure represents a TCP connection. This connection can be
110  * associated with a QP or not (in which case QP==NULL)
111  */
112 struct qed_iwarp_ep {
113 	struct list_head list_entry;
114 	struct qed_rdma_qp *qp;
115 	struct qed_iwarp_ep_memory *ep_buffer_virt;
116 	dma_addr_t ep_buffer_phys;
117 	enum qed_iwarp_ep_state state;
118 	int sig;
119 	struct qed_iwarp_cm_info cm_info;
120 	enum tcp_connect_mode connect_mode;
121 	enum mpa_rtr_type rtr_type;
122 	enum mpa_negotiation_mode mpa_rev;
123 	u32 tcp_cid;
124 	u32 cid;
125 	u16 mss;
126 	u8 remote_mac_addr[6];
127 	u8 local_mac_addr[6];
128 	bool mpa_reply_processed;
129 
130 	/* For Passive side - syn packet related data */
131 	u16 syn_ip_payload_length;
132 	struct qed_iwarp_ll2_buff *syn;
133 	dma_addr_t syn_phy_addr;
134 
135 	/* The event_cb function is called for asynchrounous events associated
136 	 * with the ep. It is initialized at different entry points depending
137 	 * on whether the ep is the tcp connection active side or passive side
138 	 * The cb_context is passed to the event_cb function.
139 	 */
140 	iwarp_event_handler event_cb;
141 	void *cb_context;
142 };
143 
144 struct qed_iwarp_listener {
145 	struct list_head list_entry;
146 
147 	/* The event_cb function is called for connection requests.
148 	 * The cb_context is passed to the event_cb function.
149 	 */
150 	iwarp_event_handler event_cb;
151 	void *cb_context;
152 	u32 max_backlog;
153 	u32 ip_addr[4];
154 	u16 port;
155 	u16 vlan;
156 	u8 ip_version;
157 };
158 
159 int qed_iwarp_alloc(struct qed_hwfn *p_hwfn);
160 
161 int qed_iwarp_setup(struct qed_hwfn *p_hwfn,
162 		    struct qed_rdma_start_in_params *params);
163 
164 void qed_iwarp_init_fw_ramrod(struct qed_hwfn *p_hwfn,
165 			      struct iwarp_init_func_ramrod_data *p_ramrod);
166 
167 int qed_iwarp_stop(struct qed_hwfn *p_hwfn);
168 
169 void qed_iwarp_resc_free(struct qed_hwfn *p_hwfn);
170 
171 void qed_iwarp_init_devinfo(struct qed_hwfn *p_hwfn);
172 
173 void qed_iwarp_init_hw(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
174 
175 int qed_iwarp_create_qp(struct qed_hwfn *p_hwfn,
176 			struct qed_rdma_qp *qp,
177 			struct qed_rdma_create_qp_out_params *out_params);
178 
179 int qed_iwarp_modify_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp,
180 			enum qed_iwarp_qp_state new_state, bool internal);
181 
182 int qed_iwarp_destroy_qp(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
183 
184 int qed_iwarp_fw_destroy(struct qed_hwfn *p_hwfn, struct qed_rdma_qp *qp);
185 
186 void qed_iwarp_query_qp(struct qed_rdma_qp *qp,
187 			struct qed_rdma_query_qp_out_params *out_params);
188 
189 int
190 qed_iwarp_connect(void *rdma_cxt,
191 		  struct qed_iwarp_connect_in *iparams,
192 		  struct qed_iwarp_connect_out *oparams);
193 
194 int
195 qed_iwarp_create_listen(void *rdma_cxt,
196 			struct qed_iwarp_listen_in *iparams,
197 			struct qed_iwarp_listen_out *oparams);
198 
199 int qed_iwarp_accept(void *rdma_cxt, struct qed_iwarp_accept_in *iparams);
200 
201 int qed_iwarp_reject(void *rdma_cxt, struct qed_iwarp_reject_in *iparams);
202 int qed_iwarp_destroy_listen(void *rdma_cxt, void *handle);
203 
204 int qed_iwarp_send_rtr(void *rdma_cxt, struct qed_iwarp_send_rtr_in *iparams);
205 
206 #endif
207