1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 /* Copyright 2021 Marvell. All rights reserved. */
3
4 #include <linux/types.h>
5 #include <asm/byteorder.h>
6 #include <asm/param.h>
7 #include <linux/delay.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/etherdevice.h>
10 #include <linux/kernel.h>
11 #include <linux/log2.h>
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/stddef.h>
15 #include <linux/string.h>
16 #include <linux/errno.h>
17 #include <linux/list.h>
18 #include <linux/qed/qed_nvmetcp_if.h>
19 #include "qed.h"
20 #include "qed_cxt.h"
21 #include "qed_dev_api.h"
22 #include "qed_hsi.h"
23 #include "qed_hw.h"
24 #include "qed_int.h"
25 #include "qed_nvmetcp.h"
26 #include "qed_ll2.h"
27 #include "qed_mcp.h"
28 #include "qed_sp.h"
29 #include "qed_reg_addr.h"
30 #include "qed_nvmetcp_fw_funcs.h"
31
qed_nvmetcp_async_event(struct qed_hwfn * p_hwfn,u8 fw_event_code,u16 echo,union event_ring_data * data,u8 fw_return_code)32 static int qed_nvmetcp_async_event(struct qed_hwfn *p_hwfn, u8 fw_event_code,
33 u16 echo, union event_ring_data *data,
34 u8 fw_return_code)
35 {
36 if (p_hwfn->p_nvmetcp_info->event_cb) {
37 struct qed_nvmetcp_info *p_nvmetcp = p_hwfn->p_nvmetcp_info;
38
39 return p_nvmetcp->event_cb(p_nvmetcp->event_context,
40 fw_event_code, data);
41 } else {
42 DP_NOTICE(p_hwfn, "nvmetcp async completion is not set\n");
43
44 return -EINVAL;
45 }
46 }
47
qed_sp_nvmetcp_func_start(struct qed_hwfn * p_hwfn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr,void * event_context,nvmetcp_event_cb_t async_event_cb)48 static int qed_sp_nvmetcp_func_start(struct qed_hwfn *p_hwfn,
49 enum spq_mode comp_mode,
50 struct qed_spq_comp_cb *p_comp_addr,
51 void *event_context,
52 nvmetcp_event_cb_t async_event_cb)
53 {
54 struct nvmetcp_init_ramrod_params *p_ramrod = NULL;
55 struct qed_nvmetcp_pf_params *p_params = NULL;
56 struct scsi_init_func_queues *p_queue = NULL;
57 struct nvmetcp_spe_func_init *p_init = NULL;
58 struct qed_sp_init_data init_data = {};
59 struct qed_spq_entry *p_ent = NULL;
60 int rc = 0;
61 u16 val;
62 u8 i;
63
64 /* Get SPQ entry */
65 init_data.cid = qed_spq_get_cid(p_hwfn);
66 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
67 init_data.comp_mode = comp_mode;
68 init_data.p_comp_data = p_comp_addr;
69 rc = qed_sp_init_request(p_hwfn, &p_ent,
70 NVMETCP_RAMROD_CMD_ID_INIT_FUNC,
71 PROTOCOLID_TCP_ULP, &init_data);
72 if (rc)
73 return rc;
74
75 p_ramrod = &p_ent->ramrod.nvmetcp_init;
76 p_init = &p_ramrod->nvmetcp_init_spe;
77 p_params = &p_hwfn->pf_params.nvmetcp_pf_params;
78 p_queue = &p_init->q_params;
79 p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
80 p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
81 p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
82 p_init->ll2_rx_queue_id = RESC_START(p_hwfn, QED_LL2_RAM_QUEUE) +
83 p_params->ll2_ooo_queue_id;
84 SET_FIELD(p_init->flags, NVMETCP_SPE_FUNC_INIT_NVMETCP_MODE, 1);
85 p_init->func_params.log_page_size = ilog2(PAGE_SIZE);
86 p_init->func_params.num_tasks = cpu_to_le16(p_params->num_tasks);
87 p_init->debug_flags = p_params->debug_mode;
88 DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
89 p_params->glbl_q_params_addr);
90 p_queue->cq_num_entries = cpu_to_le16(QED_NVMETCP_FW_CQ_SIZE);
91 p_queue->num_queues = p_params->num_queues;
92 val = RESC_START(p_hwfn, QED_CMDQS_CQS);
93 p_queue->queue_relative_offset = cpu_to_le16((u16)val);
94 p_queue->cq_sb_pi = p_params->gl_rq_pi;
95
96 for (i = 0; i < p_params->num_queues; i++) {
97 val = qed_get_igu_sb_id(p_hwfn, i);
98 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
99 }
100
101 SET_FIELD(p_queue->q_validity,
102 SCSI_INIT_FUNC_QUEUES_CMD_VALID, 0);
103 p_queue->cmdq_num_entries = 0;
104 p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);
105 p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(QED_TCP_TWO_MSL_TIMER);
106 p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(QED_TCP_SWS_TIMER);
107 p_init->half_way_close_timeout = cpu_to_le16(QED_TCP_HALF_WAY_CLOSE_TIMEOUT);
108 p_ramrod->tcp_init.max_fin_rt = QED_TCP_MAX_FIN_RT;
109 SET_FIELD(p_ramrod->nvmetcp_init_spe.params,
110 NVMETCP_SPE_FUNC_INIT_MAX_SYN_RT, QED_TCP_MAX_FIN_RT);
111 p_hwfn->p_nvmetcp_info->event_context = event_context;
112 p_hwfn->p_nvmetcp_info->event_cb = async_event_cb;
113 qed_spq_register_async_cb(p_hwfn, PROTOCOLID_TCP_ULP,
114 qed_nvmetcp_async_event);
115
116 return qed_spq_post(p_hwfn, p_ent, NULL);
117 }
118
qed_sp_nvmetcp_func_stop(struct qed_hwfn * p_hwfn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr)119 static int qed_sp_nvmetcp_func_stop(struct qed_hwfn *p_hwfn,
120 enum spq_mode comp_mode,
121 struct qed_spq_comp_cb *p_comp_addr)
122 {
123 struct qed_spq_entry *p_ent = NULL;
124 struct qed_sp_init_data init_data;
125 int rc;
126
127 /* Get SPQ entry */
128 memset(&init_data, 0, sizeof(init_data));
129 init_data.cid = qed_spq_get_cid(p_hwfn);
130 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
131 init_data.comp_mode = comp_mode;
132 init_data.p_comp_data = p_comp_addr;
133 rc = qed_sp_init_request(p_hwfn, &p_ent,
134 NVMETCP_RAMROD_CMD_ID_DESTROY_FUNC,
135 PROTOCOLID_TCP_ULP, &init_data);
136 if (rc)
137 return rc;
138
139 rc = qed_spq_post(p_hwfn, p_ent, NULL);
140 qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_TCP_ULP);
141
142 return rc;
143 }
144
qed_fill_nvmetcp_dev_info(struct qed_dev * cdev,struct qed_dev_nvmetcp_info * info)145 static int qed_fill_nvmetcp_dev_info(struct qed_dev *cdev,
146 struct qed_dev_nvmetcp_info *info)
147 {
148 struct qed_hwfn *hwfn = QED_AFFIN_HWFN(cdev);
149 int rc;
150
151 memset(info, 0, sizeof(*info));
152 rc = qed_fill_dev_info(cdev, &info->common);
153 info->port_id = MFW_PORT(hwfn);
154 info->num_cqs = FEAT_NUM(hwfn, QED_NVMETCP_CQ);
155
156 return rc;
157 }
158
qed_register_nvmetcp_ops(struct qed_dev * cdev,struct qed_nvmetcp_cb_ops * ops,void * cookie)159 static void qed_register_nvmetcp_ops(struct qed_dev *cdev,
160 struct qed_nvmetcp_cb_ops *ops,
161 void *cookie)
162 {
163 cdev->protocol_ops.nvmetcp = ops;
164 cdev->ops_cookie = cookie;
165 }
166
qed_nvmetcp_stop(struct qed_dev * cdev)167 static int qed_nvmetcp_stop(struct qed_dev *cdev)
168 {
169 int rc;
170
171 if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
172 DP_NOTICE(cdev, "nvmetcp already stopped\n");
173
174 return 0;
175 }
176
177 if (!hash_empty(cdev->connections)) {
178 DP_NOTICE(cdev,
179 "Can't stop nvmetcp - not all connections were returned\n");
180
181 return -EINVAL;
182 }
183
184 /* Stop the nvmetcp */
185 rc = qed_sp_nvmetcp_func_stop(QED_AFFIN_HWFN(cdev), QED_SPQ_MODE_EBLOCK,
186 NULL);
187 cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
188
189 return rc;
190 }
191
qed_nvmetcp_start(struct qed_dev * cdev,struct qed_nvmetcp_tid * tasks,void * event_context,nvmetcp_event_cb_t async_event_cb)192 static int qed_nvmetcp_start(struct qed_dev *cdev,
193 struct qed_nvmetcp_tid *tasks,
194 void *event_context,
195 nvmetcp_event_cb_t async_event_cb)
196 {
197 struct qed_tid_mem *tid_info;
198 int rc;
199
200 if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
201 DP_NOTICE(cdev, "nvmetcp already started;\n");
202
203 return 0;
204 }
205
206 rc = qed_sp_nvmetcp_func_start(QED_AFFIN_HWFN(cdev),
207 QED_SPQ_MODE_EBLOCK, NULL,
208 event_context, async_event_cb);
209 if (rc) {
210 DP_NOTICE(cdev, "Failed to start nvmetcp\n");
211
212 return rc;
213 }
214
215 cdev->flags |= QED_FLAG_STORAGE_STARTED;
216 hash_init(cdev->connections);
217
218 if (!tasks)
219 return 0;
220
221 tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
222 if (!tid_info) {
223 qed_nvmetcp_stop(cdev);
224
225 return -ENOMEM;
226 }
227
228 rc = qed_cxt_get_tid_mem_info(QED_AFFIN_HWFN(cdev), tid_info);
229 if (rc) {
230 DP_NOTICE(cdev, "Failed to gather task information\n");
231 qed_nvmetcp_stop(cdev);
232 kfree(tid_info);
233
234 return rc;
235 }
236
237 /* Fill task information */
238 tasks->size = tid_info->tid_size;
239 tasks->num_tids_per_block = tid_info->num_tids_per_block;
240 memcpy(tasks->blocks, tid_info->blocks,
241 MAX_TID_BLOCKS_NVMETCP * sizeof(u8 *));
242 kfree(tid_info);
243
244 return 0;
245 }
246
qed_nvmetcp_get_hash(struct qed_dev * cdev,u32 handle)247 static struct qed_hash_nvmetcp_con *qed_nvmetcp_get_hash(struct qed_dev *cdev,
248 u32 handle)
249 {
250 struct qed_hash_nvmetcp_con *hash_con = NULL;
251
252 if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
253 return NULL;
254
255 hash_for_each_possible(cdev->connections, hash_con, node, handle) {
256 if (hash_con->con->icid == handle)
257 break;
258 }
259
260 if (!hash_con || hash_con->con->icid != handle)
261 return NULL;
262
263 return hash_con;
264 }
265
qed_sp_nvmetcp_conn_offload(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr)266 static int qed_sp_nvmetcp_conn_offload(struct qed_hwfn *p_hwfn,
267 struct qed_nvmetcp_conn *p_conn,
268 enum spq_mode comp_mode,
269 struct qed_spq_comp_cb *p_comp_addr)
270 {
271 struct nvmetcp_spe_conn_offload *p_ramrod = NULL;
272 struct tcp_offload_params_opt2 *p_tcp = NULL;
273 struct qed_sp_init_data init_data = { 0 };
274 struct qed_spq_entry *p_ent = NULL;
275 dma_addr_t r2tq_pbl_addr;
276 dma_addr_t xhq_pbl_addr;
277 dma_addr_t uhq_pbl_addr;
278 u16 physical_q;
279 int rc = 0;
280 u8 i;
281
282 /* Get SPQ entry */
283 init_data.cid = p_conn->icid;
284 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
285 init_data.comp_mode = comp_mode;
286 init_data.p_comp_data = p_comp_addr;
287 rc = qed_sp_init_request(p_hwfn, &p_ent,
288 NVMETCP_RAMROD_CMD_ID_OFFLOAD_CONN,
289 PROTOCOLID_TCP_ULP, &init_data);
290 if (rc)
291 return rc;
292
293 p_ramrod = &p_ent->ramrod.nvmetcp_conn_offload;
294
295 /* Transmission PQ is the first of the PF */
296 physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
297 p_conn->physical_q0 = cpu_to_le16(physical_q);
298 p_ramrod->nvmetcp.physical_q0 = cpu_to_le16(physical_q);
299
300 /* nvmetcp Pure-ACK PQ */
301 physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
302 p_conn->physical_q1 = cpu_to_le16(physical_q);
303 p_ramrod->nvmetcp.physical_q1 = cpu_to_le16(physical_q);
304 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
305 DMA_REGPAIR_LE(p_ramrod->nvmetcp.sq_pbl_addr, p_conn->sq_pbl_addr);
306 r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
307 DMA_REGPAIR_LE(p_ramrod->nvmetcp.r2tq_pbl_addr, r2tq_pbl_addr);
308 xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
309 DMA_REGPAIR_LE(p_ramrod->nvmetcp.xhq_pbl_addr, xhq_pbl_addr);
310 uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
311 DMA_REGPAIR_LE(p_ramrod->nvmetcp.uhq_pbl_addr, uhq_pbl_addr);
312 p_ramrod->nvmetcp.flags = p_conn->offl_flags;
313 p_ramrod->nvmetcp.default_cq = p_conn->default_cq;
314 p_ramrod->nvmetcp.initial_ack = 0;
315 DMA_REGPAIR_LE(p_ramrod->nvmetcp.nvmetcp.cccid_itid_table_addr,
316 p_conn->nvmetcp_cccid_itid_table_addr);
317 p_ramrod->nvmetcp.nvmetcp.cccid_max_range =
318 cpu_to_le16(p_conn->nvmetcp_cccid_max_range);
319 p_tcp = &p_ramrod->tcp;
320 qed_set_fw_mac_addr(&p_tcp->remote_mac_addr_hi,
321 &p_tcp->remote_mac_addr_mid,
322 &p_tcp->remote_mac_addr_lo, p_conn->remote_mac);
323 qed_set_fw_mac_addr(&p_tcp->local_mac_addr_hi,
324 &p_tcp->local_mac_addr_mid,
325 &p_tcp->local_mac_addr_lo, p_conn->local_mac);
326 p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
327 p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);
328 p_tcp->ip_version = p_conn->ip_version;
329 if (p_tcp->ip_version == TCP_IPV6) {
330 for (i = 0; i < 4; i++) {
331 p_tcp->remote_ip[i] = cpu_to_le32(p_conn->remote_ip[i]);
332 p_tcp->local_ip[i] = cpu_to_le32(p_conn->local_ip[i]);
333 }
334 } else {
335 p_tcp->remote_ip[0] = cpu_to_le32(p_conn->remote_ip[0]);
336 p_tcp->local_ip[0] = cpu_to_le32(p_conn->local_ip[0]);
337 }
338
339 p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
340 p_tcp->ttl = p_conn->ttl;
341 p_tcp->tos_or_tc = p_conn->tos_or_tc;
342 p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
343 p_tcp->local_port = cpu_to_le16(p_conn->local_port);
344 p_tcp->mss = cpu_to_le16(p_conn->mss);
345 p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
346 p_tcp->connect_mode = p_conn->connect_mode;
347 p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
348 p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
349 p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
350 p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
351 p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
352
353 return qed_spq_post(p_hwfn, p_ent, NULL);
354 }
355
qed_sp_nvmetcp_conn_update(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr)356 static int qed_sp_nvmetcp_conn_update(struct qed_hwfn *p_hwfn,
357 struct qed_nvmetcp_conn *p_conn,
358 enum spq_mode comp_mode,
359 struct qed_spq_comp_cb *p_comp_addr)
360 {
361 struct nvmetcp_conn_update_ramrod_params *p_ramrod = NULL;
362 struct qed_spq_entry *p_ent = NULL;
363 struct qed_sp_init_data init_data;
364 int rc = -EINVAL;
365 u32 dval;
366
367 /* Get SPQ entry */
368 memset(&init_data, 0, sizeof(init_data));
369 init_data.cid = p_conn->icid;
370 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
371 init_data.comp_mode = comp_mode;
372 init_data.p_comp_data = p_comp_addr;
373
374 rc = qed_sp_init_request(p_hwfn, &p_ent,
375 NVMETCP_RAMROD_CMD_ID_UPDATE_CONN,
376 PROTOCOLID_TCP_ULP, &init_data);
377 if (rc)
378 return rc;
379
380 p_ramrod = &p_ent->ramrod.nvmetcp_conn_update;
381 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
382 p_ramrod->flags = p_conn->update_flag;
383 p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
384 dval = p_conn->max_recv_pdu_length;
385 p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
386 dval = p_conn->max_send_pdu_length;
387 p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
388 p_ramrod->first_seq_length = cpu_to_le32(p_conn->first_seq_length);
389
390 return qed_spq_post(p_hwfn, p_ent, NULL);
391 }
392
qed_sp_nvmetcp_conn_terminate(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr)393 static int qed_sp_nvmetcp_conn_terminate(struct qed_hwfn *p_hwfn,
394 struct qed_nvmetcp_conn *p_conn,
395 enum spq_mode comp_mode,
396 struct qed_spq_comp_cb *p_comp_addr)
397 {
398 struct nvmetcp_spe_conn_termination *p_ramrod = NULL;
399 struct qed_spq_entry *p_ent = NULL;
400 struct qed_sp_init_data init_data;
401 int rc = -EINVAL;
402
403 /* Get SPQ entry */
404 memset(&init_data, 0, sizeof(init_data));
405 init_data.cid = p_conn->icid;
406 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
407 init_data.comp_mode = comp_mode;
408 init_data.p_comp_data = p_comp_addr;
409 rc = qed_sp_init_request(p_hwfn, &p_ent,
410 NVMETCP_RAMROD_CMD_ID_TERMINATION_CONN,
411 PROTOCOLID_TCP_ULP, &init_data);
412 if (rc)
413 return rc;
414
415 p_ramrod = &p_ent->ramrod.nvmetcp_conn_terminate;
416 p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
417 p_ramrod->abortive = p_conn->abortive_dsconnect;
418
419 return qed_spq_post(p_hwfn, p_ent, NULL);
420 }
421
qed_sp_nvmetcp_conn_clear_sq(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn,enum spq_mode comp_mode,struct qed_spq_comp_cb * p_comp_addr)422 static int qed_sp_nvmetcp_conn_clear_sq(struct qed_hwfn *p_hwfn,
423 struct qed_nvmetcp_conn *p_conn,
424 enum spq_mode comp_mode,
425 struct qed_spq_comp_cb *p_comp_addr)
426 {
427 struct qed_spq_entry *p_ent = NULL;
428 struct qed_sp_init_data init_data;
429 int rc = -EINVAL;
430
431 /* Get SPQ entry */
432 memset(&init_data, 0, sizeof(init_data));
433 init_data.cid = p_conn->icid;
434 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
435 init_data.comp_mode = comp_mode;
436 init_data.p_comp_data = p_comp_addr;
437 rc = qed_sp_init_request(p_hwfn, &p_ent,
438 NVMETCP_RAMROD_CMD_ID_CLEAR_SQ,
439 PROTOCOLID_TCP_ULP, &init_data);
440 if (rc)
441 return rc;
442
443 return qed_spq_post(p_hwfn, p_ent, NULL);
444 }
445
qed_nvmetcp_get_db_addr(struct qed_hwfn * p_hwfn,u32 cid)446 static void __iomem *qed_nvmetcp_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
447 {
448 return (u8 __iomem *)p_hwfn->doorbells +
449 qed_db_addr(cid, DQ_DEMS_LEGACY);
450 }
451
qed_nvmetcp_allocate_connection(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn ** p_out_conn)452 static int qed_nvmetcp_allocate_connection(struct qed_hwfn *p_hwfn,
453 struct qed_nvmetcp_conn **p_out_conn)
454 {
455 struct qed_chain_init_params params = {
456 .mode = QED_CHAIN_MODE_PBL,
457 .intended_use = QED_CHAIN_USE_TO_CONSUME_PRODUCE,
458 .cnt_type = QED_CHAIN_CNT_TYPE_U16,
459 };
460 struct qed_nvmetcp_pf_params *p_params = NULL;
461 struct qed_nvmetcp_conn *p_conn = NULL;
462 int rc = 0;
463
464 /* Try finding a free connection that can be used */
465 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
466 if (!list_empty(&p_hwfn->p_nvmetcp_info->free_list))
467 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,
468 struct qed_nvmetcp_conn, list_entry);
469 if (p_conn) {
470 list_del(&p_conn->list_entry);
471 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
472 *p_out_conn = p_conn;
473
474 return 0;
475 }
476 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
477
478 /* Need to allocate a new connection */
479 p_params = &p_hwfn->pf_params.nvmetcp_pf_params;
480 p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
481 if (!p_conn)
482 return -ENOMEM;
483
484 params.num_elems = p_params->num_r2tq_pages_in_ring *
485 QED_CHAIN_PAGE_SIZE / sizeof(struct nvmetcp_wqe);
486 params.elem_size = sizeof(struct nvmetcp_wqe);
487 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->r2tq, ¶ms);
488 if (rc)
489 goto nomem_r2tq;
490
491 params.num_elems = p_params->num_uhq_pages_in_ring *
492 QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
493 params.elem_size = sizeof(struct iscsi_uhqe);
494 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->uhq, ¶ms);
495 if (rc)
496 goto nomem_uhq;
497
498 params.elem_size = sizeof(struct iscsi_xhqe);
499 rc = qed_chain_alloc(p_hwfn->cdev, &p_conn->xhq, ¶ms);
500 if (rc)
501 goto nomem;
502
503 p_conn->free_on_delete = true;
504 *p_out_conn = p_conn;
505
506 return 0;
507
508 nomem:
509 qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
510 nomem_uhq:
511 qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
512 nomem_r2tq:
513 kfree(p_conn);
514
515 return -ENOMEM;
516 }
517
qed_nvmetcp_acquire_connection(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn ** p_out_conn)518 static int qed_nvmetcp_acquire_connection(struct qed_hwfn *p_hwfn,
519 struct qed_nvmetcp_conn **p_out_conn)
520 {
521 struct qed_nvmetcp_conn *p_conn = NULL;
522 int rc = 0;
523 u32 icid;
524
525 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
526 rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_TCP_ULP, &icid);
527 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
528
529 if (rc)
530 return rc;
531
532 rc = qed_nvmetcp_allocate_connection(p_hwfn, &p_conn);
533 if (rc) {
534 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
535 qed_cxt_release_cid(p_hwfn, icid);
536 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
537
538 return rc;
539 }
540
541 p_conn->icid = icid;
542 p_conn->conn_id = (u16)icid;
543 p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
544 *p_out_conn = p_conn;
545
546 return rc;
547 }
548
qed_nvmetcp_release_connection(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn)549 static void qed_nvmetcp_release_connection(struct qed_hwfn *p_hwfn,
550 struct qed_nvmetcp_conn *p_conn)
551 {
552 spin_lock_bh(&p_hwfn->p_nvmetcp_info->lock);
553 list_add_tail(&p_conn->list_entry, &p_hwfn->p_nvmetcp_info->free_list);
554 qed_cxt_release_cid(p_hwfn, p_conn->icid);
555 spin_unlock_bh(&p_hwfn->p_nvmetcp_info->lock);
556 }
557
qed_nvmetcp_free_connection(struct qed_hwfn * p_hwfn,struct qed_nvmetcp_conn * p_conn)558 static void qed_nvmetcp_free_connection(struct qed_hwfn *p_hwfn,
559 struct qed_nvmetcp_conn *p_conn)
560 {
561 qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
562 qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
563 qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
564 kfree(p_conn);
565 }
566
qed_nvmetcp_alloc(struct qed_hwfn * p_hwfn)567 int qed_nvmetcp_alloc(struct qed_hwfn *p_hwfn)
568 {
569 struct qed_nvmetcp_info *p_nvmetcp_info;
570
571 p_nvmetcp_info = kzalloc(sizeof(*p_nvmetcp_info), GFP_KERNEL);
572 if (!p_nvmetcp_info)
573 return -ENOMEM;
574
575 INIT_LIST_HEAD(&p_nvmetcp_info->free_list);
576 p_hwfn->p_nvmetcp_info = p_nvmetcp_info;
577
578 return 0;
579 }
580
qed_nvmetcp_setup(struct qed_hwfn * p_hwfn)581 void qed_nvmetcp_setup(struct qed_hwfn *p_hwfn)
582 {
583 spin_lock_init(&p_hwfn->p_nvmetcp_info->lock);
584 }
585
qed_nvmetcp_free(struct qed_hwfn * p_hwfn)586 void qed_nvmetcp_free(struct qed_hwfn *p_hwfn)
587 {
588 struct qed_nvmetcp_conn *p_conn = NULL;
589
590 if (!p_hwfn->p_nvmetcp_info)
591 return;
592
593 while (!list_empty(&p_hwfn->p_nvmetcp_info->free_list)) {
594 p_conn = list_first_entry(&p_hwfn->p_nvmetcp_info->free_list,
595 struct qed_nvmetcp_conn, list_entry);
596 if (p_conn) {
597 list_del(&p_conn->list_entry);
598 qed_nvmetcp_free_connection(p_hwfn, p_conn);
599 }
600 }
601
602 kfree(p_hwfn->p_nvmetcp_info);
603 p_hwfn->p_nvmetcp_info = NULL;
604 }
605
qed_nvmetcp_acquire_conn(struct qed_dev * cdev,u32 * handle,u32 * fw_cid,void __iomem ** p_doorbell)606 static int qed_nvmetcp_acquire_conn(struct qed_dev *cdev,
607 u32 *handle,
608 u32 *fw_cid, void __iomem **p_doorbell)
609 {
610 struct qed_hash_nvmetcp_con *hash_con;
611 int rc;
612
613 /* Allocate a hashed connection */
614 hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
615 if (!hash_con)
616 return -ENOMEM;
617
618 /* Acquire the connection */
619 rc = qed_nvmetcp_acquire_connection(QED_AFFIN_HWFN(cdev),
620 &hash_con->con);
621 if (rc) {
622 DP_NOTICE(cdev, "Failed to acquire Connection\n");
623 kfree(hash_con);
624
625 return rc;
626 }
627
628 /* Added the connection to hash table */
629 *handle = hash_con->con->icid;
630 *fw_cid = hash_con->con->fw_cid;
631 hash_add(cdev->connections, &hash_con->node, *handle);
632 if (p_doorbell)
633 *p_doorbell = qed_nvmetcp_get_db_addr(QED_AFFIN_HWFN(cdev),
634 *handle);
635
636 return 0;
637 }
638
qed_nvmetcp_release_conn(struct qed_dev * cdev,u32 handle)639 static int qed_nvmetcp_release_conn(struct qed_dev *cdev, u32 handle)
640 {
641 struct qed_hash_nvmetcp_con *hash_con;
642
643 hash_con = qed_nvmetcp_get_hash(cdev, handle);
644 if (!hash_con) {
645 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
646 handle);
647
648 return -EINVAL;
649 }
650
651 hlist_del(&hash_con->node);
652 qed_nvmetcp_release_connection(QED_AFFIN_HWFN(cdev), hash_con->con);
653 kfree(hash_con);
654
655 return 0;
656 }
657
qed_nvmetcp_offload_conn(struct qed_dev * cdev,u32 handle,struct qed_nvmetcp_params_offload * conn_info)658 static int qed_nvmetcp_offload_conn(struct qed_dev *cdev, u32 handle,
659 struct qed_nvmetcp_params_offload *conn_info)
660 {
661 struct qed_hash_nvmetcp_con *hash_con;
662 struct qed_nvmetcp_conn *con;
663
664 hash_con = qed_nvmetcp_get_hash(cdev, handle);
665 if (!hash_con) {
666 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
667 handle);
668
669 return -EINVAL;
670 }
671
672 /* Update the connection with information from the params */
673 con = hash_con->con;
674
675 /* FW initializations */
676 con->layer_code = NVMETCP_SLOW_PATH_LAYER_CODE;
677 con->sq_pbl_addr = conn_info->sq_pbl_addr;
678 con->nvmetcp_cccid_max_range = conn_info->nvmetcp_cccid_max_range;
679 con->nvmetcp_cccid_itid_table_addr = conn_info->nvmetcp_cccid_itid_table_addr;
680 con->default_cq = conn_info->default_cq;
681 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TARGET_MODE, 0);
682 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_NVMETCP_MODE, 1);
683 SET_FIELD(con->offl_flags, NVMETCP_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B, 1);
684
685 /* Networking and TCP stack initializations */
686 ether_addr_copy(con->local_mac, conn_info->src.mac);
687 ether_addr_copy(con->remote_mac, conn_info->dst.mac);
688 memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
689 memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
690 con->local_port = conn_info->src.port;
691 con->remote_port = conn_info->dst.port;
692 con->vlan_id = conn_info->vlan_id;
693
694 if (conn_info->timestamp_en)
695 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_TS_EN, 1);
696
697 if (conn_info->delayed_ack_en)
698 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_DA_EN, 1);
699
700 if (conn_info->tcp_keep_alive_en)
701 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_KA_EN, 1);
702
703 if (conn_info->ecn_en)
704 SET_FIELD(con->tcp_flags, TCP_OFFLOAD_PARAMS_OPT2_ECN_EN, 1);
705
706 con->ip_version = conn_info->ip_version;
707 con->flow_label = QED_TCP_FLOW_LABEL;
708 con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
709 con->ka_timeout = conn_info->ka_timeout;
710 con->ka_interval = conn_info->ka_interval;
711 con->max_rt_time = conn_info->max_rt_time;
712 con->ttl = conn_info->ttl;
713 con->tos_or_tc = conn_info->tos_or_tc;
714 con->mss = conn_info->mss;
715 con->cwnd = conn_info->cwnd;
716 con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
717 con->connect_mode = 0;
718
719 return qed_sp_nvmetcp_conn_offload(QED_AFFIN_HWFN(cdev), con,
720 QED_SPQ_MODE_EBLOCK, NULL);
721 }
722
qed_nvmetcp_update_conn(struct qed_dev * cdev,u32 handle,struct qed_nvmetcp_params_update * conn_info)723 static int qed_nvmetcp_update_conn(struct qed_dev *cdev,
724 u32 handle,
725 struct qed_nvmetcp_params_update *conn_info)
726 {
727 struct qed_hash_nvmetcp_con *hash_con;
728 struct qed_nvmetcp_conn *con;
729
730 hash_con = qed_nvmetcp_get_hash(cdev, handle);
731 if (!hash_con) {
732 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
733 handle);
734
735 return -EINVAL;
736 }
737
738 /* Update the connection with information from the params */
739 con = hash_con->con;
740 SET_FIELD(con->update_flag,
741 ISCSI_CONN_UPDATE_RAMROD_PARAMS_INITIAL_R2T, 0);
742 SET_FIELD(con->update_flag,
743 ISCSI_CONN_UPDATE_RAMROD_PARAMS_IMMEDIATE_DATA, 1);
744 if (conn_info->hdr_digest_en)
745 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_HD_EN, 1);
746
747 if (conn_info->data_digest_en)
748 SET_FIELD(con->update_flag, ISCSI_CONN_UPDATE_RAMROD_PARAMS_DD_EN, 1);
749
750 /* Placeholder - initialize pfv, cpda, hpda */
751
752 con->max_seq_size = conn_info->max_io_size;
753 con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
754 con->max_send_pdu_length = conn_info->max_send_pdu_length;
755 con->first_seq_length = conn_info->max_io_size;
756
757 return qed_sp_nvmetcp_conn_update(QED_AFFIN_HWFN(cdev), con,
758 QED_SPQ_MODE_EBLOCK, NULL);
759 }
760
qed_nvmetcp_clear_conn_sq(struct qed_dev * cdev,u32 handle)761 static int qed_nvmetcp_clear_conn_sq(struct qed_dev *cdev, u32 handle)
762 {
763 struct qed_hash_nvmetcp_con *hash_con;
764
765 hash_con = qed_nvmetcp_get_hash(cdev, handle);
766 if (!hash_con) {
767 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
768 handle);
769
770 return -EINVAL;
771 }
772
773 return qed_sp_nvmetcp_conn_clear_sq(QED_AFFIN_HWFN(cdev), hash_con->con,
774 QED_SPQ_MODE_EBLOCK, NULL);
775 }
776
qed_nvmetcp_destroy_conn(struct qed_dev * cdev,u32 handle,u8 abrt_conn)777 static int qed_nvmetcp_destroy_conn(struct qed_dev *cdev,
778 u32 handle, u8 abrt_conn)
779 {
780 struct qed_hash_nvmetcp_con *hash_con;
781
782 hash_con = qed_nvmetcp_get_hash(cdev, handle);
783 if (!hash_con) {
784 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
785 handle);
786
787 return -EINVAL;
788 }
789
790 hash_con->con->abortive_dsconnect = abrt_conn;
791
792 return qed_sp_nvmetcp_conn_terminate(QED_AFFIN_HWFN(cdev), hash_con->con,
793 QED_SPQ_MODE_EBLOCK, NULL);
794 }
795
796 static const struct qed_nvmetcp_ops qed_nvmetcp_ops_pass = {
797 .common = &qed_common_ops_pass,
798 .ll2 = &qed_ll2_ops_pass,
799 .fill_dev_info = &qed_fill_nvmetcp_dev_info,
800 .register_ops = &qed_register_nvmetcp_ops,
801 .start = &qed_nvmetcp_start,
802 .stop = &qed_nvmetcp_stop,
803 .acquire_conn = &qed_nvmetcp_acquire_conn,
804 .release_conn = &qed_nvmetcp_release_conn,
805 .offload_conn = &qed_nvmetcp_offload_conn,
806 .update_conn = &qed_nvmetcp_update_conn,
807 .destroy_conn = &qed_nvmetcp_destroy_conn,
808 .clear_sq = &qed_nvmetcp_clear_conn_sq,
809 .add_src_tcp_port_filter = &qed_llh_add_src_tcp_port_filter,
810 .remove_src_tcp_port_filter = &qed_llh_remove_src_tcp_port_filter,
811 .add_dst_tcp_port_filter = &qed_llh_add_dst_tcp_port_filter,
812 .remove_dst_tcp_port_filter = &qed_llh_remove_dst_tcp_port_filter,
813 .clear_all_filters = &qed_llh_clear_all_filters,
814 .init_read_io = &init_nvmetcp_host_read_task,
815 .init_write_io = &init_nvmetcp_host_write_task,
816 .init_icreq_exchange = &init_nvmetcp_init_conn_req_task,
817 .init_task_cleanup = &init_cleanup_task_nvmetcp
818 };
819
qed_get_nvmetcp_ops(void)820 const struct qed_nvmetcp_ops *qed_get_nvmetcp_ops(void)
821 {
822 return &qed_nvmetcp_ops_pass;
823 }
824 EXPORT_SYMBOL(qed_get_nvmetcp_ops);
825
qed_put_nvmetcp_ops(void)826 void qed_put_nvmetcp_ops(void)
827 {
828 }
829 EXPORT_SYMBOL(qed_put_nvmetcp_ops);
830