1 // SPDX-License-Identifier: GPL-2.0-only
2 /* QLogic FCoE Offload Driver
3  * Copyright (c) 2016-2018 Cavium Inc.
4  */
5 #include "drv_fcoe_fw_funcs.h"
6 #include "drv_scsi_fw_funcs.h"
7 
8 #define FCOE_RX_ID (0xFFFFu)
9 
10 static inline void init_common_sqe(struct fcoe_task_params *task_params,
11 				   enum fcoe_sqe_request_type request_type)
12 {
13 	memset(task_params->sqe, 0, sizeof(*(task_params->sqe)));
14 	SET_FIELD(task_params->sqe->flags, FCOE_WQE_REQ_TYPE,
15 		  request_type);
16 	task_params->sqe->task_id = task_params->itid;
17 }
18 
19 int init_initiator_rw_fcoe_task(struct fcoe_task_params *task_params,
20 				struct scsi_sgl_task_params *sgl_task_params,
21 				struct regpair sense_data_buffer_phys_addr,
22 				u32 task_retry_id,
23 				u8 fcp_cmd_payload[32])
24 {
25 	struct fcoe_task_context *ctx = task_params->context;
26 	const u8 val_byte = ctx->ystorm_ag_context.byte0;
27 	struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
28 	struct ystorm_fcoe_task_st_ctx *y_st_ctx;
29 	struct tstorm_fcoe_task_st_ctx *t_st_ctx;
30 	struct mstorm_fcoe_task_st_ctx *m_st_ctx;
31 	u32 io_size, val;
32 	bool slow_sgl;
33 
34 	memset(ctx, 0, sizeof(*(ctx)));
35 	ctx->ystorm_ag_context.byte0 = val_byte;
36 	slow_sgl = scsi_is_slow_sgl(sgl_task_params->num_sges,
37 				    sgl_task_params->small_mid_sge);
38 	io_size = (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR ?
39 		   task_params->tx_io_size : task_params->rx_io_size);
40 
41 	/* Ystorm ctx */
42 	y_st_ctx = &ctx->ystorm_st_context;
43 	y_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
44 	y_st_ctx->task_rety_identifier = cpu_to_le32(task_retry_id);
45 	y_st_ctx->task_type = (u8)task_params->task_type;
46 	memcpy(&y_st_ctx->tx_info_union.fcp_cmd_payload,
47 	       fcp_cmd_payload, sizeof(struct fcoe_fcp_cmd_payload));
48 
49 	/* Tstorm ctx */
50 	t_st_ctx = &ctx->tstorm_st_context;
51 	t_st_ctx->read_only.dev_type = (u8)(task_params->is_tape_device == 1 ?
52 					    FCOE_TASK_DEV_TYPE_TAPE :
53 					    FCOE_TASK_DEV_TYPE_DISK);
54 	t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
55 	val = cpu_to_le32(task_params->cq_rss_number);
56 	t_st_ctx->read_only.glbl_q_num = val;
57 	t_st_ctx->read_only.fcp_cmd_trns_size = cpu_to_le32(io_size);
58 	t_st_ctx->read_only.task_type = (u8)task_params->task_type;
59 	SET_FIELD(t_st_ctx->read_write.flags,
60 		  FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
61 	t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
62 
63 	/* Ustorm ctx */
64 	u_ag_ctx = &ctx->ustorm_ag_context;
65 	u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
66 
67 	/* Mstorm buffer for sense/rsp data placement */
68 	m_st_ctx = &ctx->mstorm_st_context;
69 	val = cpu_to_le32(sense_data_buffer_phys_addr.hi);
70 	m_st_ctx->rsp_buf_addr.hi = val;
71 	val = cpu_to_le32(sense_data_buffer_phys_addr.lo);
72 	m_st_ctx->rsp_buf_addr.lo = val;
73 
74 	if (task_params->task_type == FCOE_TASK_TYPE_WRITE_INITIATOR) {
75 		/* Ystorm ctx */
76 		y_st_ctx->expect_first_xfer = 1;
77 
78 		/* Set the amount of super SGEs. Can be up to 4. */
79 		SET_FIELD(y_st_ctx->sgl_mode,
80 			  YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
81 			  (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
82 		init_scsi_sgl_context(&y_st_ctx->sgl_params,
83 				      &y_st_ctx->data_desc,
84 				      sgl_task_params);
85 
86 		/* Mstorm ctx */
87 		SET_FIELD(m_st_ctx->flags,
88 			  MSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE,
89 			  (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
90 		m_st_ctx->sgl_params.sgl_num_sges =
91 			cpu_to_le16(sgl_task_params->num_sges);
92 	} else {
93 		/* Tstorm ctx */
94 		SET_FIELD(t_st_ctx->read_write.flags,
95 			  FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_RX_SGL_MODE,
96 			  (slow_sgl ? SCSI_TX_SLOW_SGL : SCSI_FAST_SGL));
97 
98 		/* Mstorm ctx */
99 		m_st_ctx->data_2_trns_rem = cpu_to_le32(io_size);
100 		init_scsi_sgl_context(&m_st_ctx->sgl_params,
101 				      &m_st_ctx->data_desc,
102 				      sgl_task_params);
103 	}
104 
105 	/* Init Sqe */
106 	init_common_sqe(task_params, SEND_FCOE_CMD);
107 
108 	return 0;
109 }
110 
111 int init_initiator_midpath_unsolicited_fcoe_task(
112 	struct fcoe_task_params *task_params,
113 	struct fcoe_tx_mid_path_params *mid_path_fc_header,
114 	struct scsi_sgl_task_params *tx_sgl_task_params,
115 	struct scsi_sgl_task_params *rx_sgl_task_params,
116 	u8 fw_to_place_fc_header)
117 {
118 	struct fcoe_task_context *ctx = task_params->context;
119 	const u8 val_byte = ctx->ystorm_ag_context.byte0;
120 	struct ustorm_fcoe_task_ag_ctx *u_ag_ctx;
121 	struct ystorm_fcoe_task_st_ctx *y_st_ctx;
122 	struct tstorm_fcoe_task_st_ctx *t_st_ctx;
123 	struct mstorm_fcoe_task_st_ctx *m_st_ctx;
124 	u32 val;
125 
126 	memset(ctx, 0, sizeof(*(ctx)));
127 	ctx->ystorm_ag_context.byte0 = val_byte;
128 
129 	/* Init Ystorm */
130 	y_st_ctx = &ctx->ystorm_st_context;
131 	init_scsi_sgl_context(&y_st_ctx->sgl_params,
132 			      &y_st_ctx->data_desc,
133 			      tx_sgl_task_params);
134 	SET_FIELD(y_st_ctx->sgl_mode,
135 		  YSTORM_FCOE_TASK_ST_CTX_TX_SGL_MODE, SCSI_FAST_SGL);
136 	y_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->tx_io_size);
137 	y_st_ctx->task_type = (u8)task_params->task_type;
138 	memcpy(&y_st_ctx->tx_info_union.tx_params.mid_path,
139 	       mid_path_fc_header, sizeof(struct fcoe_tx_mid_path_params));
140 
141 	/* Init Mstorm */
142 	m_st_ctx = &ctx->mstorm_st_context;
143 	init_scsi_sgl_context(&m_st_ctx->sgl_params,
144 			      &m_st_ctx->data_desc,
145 			      rx_sgl_task_params);
146 	SET_FIELD(m_st_ctx->flags,
147 		  MSTORM_FCOE_TASK_ST_CTX_MP_INCLUDE_FC_HEADER,
148 		  fw_to_place_fc_header);
149 	m_st_ctx->data_2_trns_rem = cpu_to_le32(task_params->rx_io_size);
150 
151 	/* Init Tstorm */
152 	t_st_ctx = &ctx->tstorm_st_context;
153 	t_st_ctx->read_only.cid = cpu_to_le32(task_params->conn_cid);
154 	val = cpu_to_le32(task_params->cq_rss_number);
155 	t_st_ctx->read_only.glbl_q_num = val;
156 	t_st_ctx->read_only.task_type = (u8)task_params->task_type;
157 	SET_FIELD(t_st_ctx->read_write.flags,
158 		  FCOE_TSTORM_FCOE_TASK_ST_CTX_READ_WRITE_EXP_FIRST_FRAME, 1);
159 	t_st_ctx->read_write.rx_id = cpu_to_le16(FCOE_RX_ID);
160 
161 	/* Init Ustorm */
162 	u_ag_ctx = &ctx->ustorm_ag_context;
163 	u_ag_ctx->global_cq_num = cpu_to_le32(task_params->cq_rss_number);
164 
165 	/* Init SQE */
166 	init_common_sqe(task_params, SEND_FCOE_MIDPATH);
167 	task_params->sqe->additional_info_union.burst_length =
168 				    tx_sgl_task_params->total_buffer_size;
169 	SET_FIELD(task_params->sqe->flags,
170 		  FCOE_WQE_NUM_SGES, tx_sgl_task_params->num_sges);
171 	SET_FIELD(task_params->sqe->flags, FCOE_WQE_SGL_MODE,
172 		  SCSI_FAST_SGL);
173 
174 	return 0;
175 }
176 
177 int init_initiator_abort_fcoe_task(struct fcoe_task_params *task_params)
178 {
179 	init_common_sqe(task_params, SEND_FCOE_ABTS_REQUEST);
180 	return 0;
181 }
182 
183 int init_initiator_cleanup_fcoe_task(struct fcoe_task_params *task_params)
184 {
185 	init_common_sqe(task_params, FCOE_EXCHANGE_CLEANUP);
186 	return 0;
187 }
188 
189 int init_initiator_sequence_recovery_fcoe_task(
190 	struct fcoe_task_params *task_params, u32 desired_offset)
191 {
192 	init_common_sqe(task_params, FCOE_SEQUENCE_RECOVERY);
193 	task_params->sqe->additional_info_union.seq_rec_updated_offset =
194 								desired_offset;
195 	return 0;
196 }
197