1135387bd99d704f517679c4716760e39acce52c
[sfrench/cifs-2.6.git] / drivers / net / ethernet / qlogic / qed / qed_iscsi.c
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
33 #include <linux/types.h>
34 #include <asm/byteorder.h>
35 #include <asm/param.h>
36 #include <linux/delay.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/etherdevice.h>
39 #include <linux/interrupt.h>
40 #include <linux/kernel.h>
41 #include <linux/log2.h>
42 #include <linux/module.h>
43 #include <linux/pci.h>
44 #include <linux/slab.h>
45 #include <linux/stddef.h>
46 #include <linux/string.h>
47 #include <linux/workqueue.h>
48 #include <linux/errno.h>
49 #include <linux/list.h>
50 #include <linux/spinlock.h>
51 #include <linux/qed/qed_iscsi_if.h>
52 #include "qed.h"
53 #include "qed_cxt.h"
54 #include "qed_dev_api.h"
55 #include "qed_hsi.h"
56 #include "qed_hw.h"
57 #include "qed_int.h"
58 #include "qed_iscsi.h"
59 #include "qed_ll2.h"
60 #include "qed_mcp.h"
61 #include "qed_sp.h"
62 #include "qed_sriov.h"
63 #include "qed_reg_addr.h"
64
65 struct qed_iscsi_conn {
66         struct list_head list_entry;
67         bool free_on_delete;
68
69         u16 conn_id;
70         u32 icid;
71         u32 fw_cid;
72
73         u8 layer_code;
74         u8 offl_flags;
75         u8 connect_mode;
76         u32 initial_ack;
77         dma_addr_t sq_pbl_addr;
78         struct qed_chain r2tq;
79         struct qed_chain xhq;
80         struct qed_chain uhq;
81
82         struct tcp_upload_params *tcp_upload_params_virt_addr;
83         dma_addr_t tcp_upload_params_phys_addr;
84         struct scsi_terminate_extra_params *queue_cnts_virt_addr;
85         dma_addr_t queue_cnts_phys_addr;
86         dma_addr_t syn_phy_addr;
87
88         u16 syn_ip_payload_length;
89         u8 local_mac[6];
90         u8 remote_mac[6];
91         u16 vlan_id;
92         u16 tcp_flags;
93         u8 ip_version;
94         u32 remote_ip[4];
95         u32 local_ip[4];
96         u8 ka_max_probe_cnt;
97         u8 dup_ack_theshold;
98         u32 rcv_next;
99         u32 snd_una;
100         u32 snd_next;
101         u32 snd_max;
102         u32 snd_wnd;
103         u32 rcv_wnd;
104         u32 snd_wl1;
105         u32 cwnd;
106         u32 ss_thresh;
107         u16 srtt;
108         u16 rtt_var;
109         u32 ts_recent;
110         u32 ts_recent_age;
111         u32 total_rt;
112         u32 ka_timeout_delta;
113         u32 rt_timeout_delta;
114         u8 dup_ack_cnt;
115         u8 snd_wnd_probe_cnt;
116         u8 ka_probe_cnt;
117         u8 rt_cnt;
118         u32 flow_label;
119         u32 ka_timeout;
120         u32 ka_interval;
121         u32 max_rt_time;
122         u32 initial_rcv_wnd;
123         u8 ttl;
124         u8 tos_or_tc;
125         u16 remote_port;
126         u16 local_port;
127         u16 mss;
128         u8 snd_wnd_scale;
129         u8 rcv_wnd_scale;
130         u16 da_timeout_value;
131         u8 ack_frequency;
132
133         u8 update_flag;
134         u8 default_cq;
135         u32 max_seq_size;
136         u32 max_recv_pdu_length;
137         u32 max_send_pdu_length;
138         u32 first_seq_length;
139         u32 exp_stat_sn;
140         u32 stat_sn;
141         u16 physical_q0;
142         u16 physical_q1;
143         u8 abortive_dsconnect;
144 };
145
146 static int
147 qed_iscsi_async_event(struct qed_hwfn *p_hwfn,
148                       u8 fw_event_code,
149                       u16 echo, union event_ring_data *data, u8 fw_return_code)
150 {
151         if (p_hwfn->p_iscsi_info->event_cb) {
152                 struct qed_iscsi_info *p_iscsi = p_hwfn->p_iscsi_info;
153
154                 return p_iscsi->event_cb(p_iscsi->event_context,
155                                          fw_event_code, data);
156         } else {
157                 DP_NOTICE(p_hwfn, "iSCSI async completion is not set\n");
158                 return -EINVAL;
159         }
160 }
161
162 static int
163 qed_sp_iscsi_func_start(struct qed_hwfn *p_hwfn,
164                         enum spq_mode comp_mode,
165                         struct qed_spq_comp_cb *p_comp_addr,
166                         void *event_context, iscsi_event_cb_t async_event_cb)
167 {
168         struct iscsi_init_ramrod_params *p_ramrod = NULL;
169         struct scsi_init_func_queues *p_queue = NULL;
170         struct qed_iscsi_pf_params *p_params = NULL;
171         struct iscsi_spe_func_init *p_init = NULL;
172         struct qed_spq_entry *p_ent = NULL;
173         struct qed_sp_init_data init_data;
174         int rc = 0;
175         u32 dval;
176         u16 val;
177         u8 i;
178
179         /* Get SPQ entry */
180         memset(&init_data, 0, sizeof(init_data));
181         init_data.cid = qed_spq_get_cid(p_hwfn);
182         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
183         init_data.comp_mode = comp_mode;
184         init_data.p_comp_data = p_comp_addr;
185
186         rc = qed_sp_init_request(p_hwfn, &p_ent,
187                                  ISCSI_RAMROD_CMD_ID_INIT_FUNC,
188                                  PROTOCOLID_ISCSI, &init_data);
189         if (rc)
190                 return rc;
191
192         p_ramrod = &p_ent->ramrod.iscsi_init;
193         p_init = &p_ramrod->iscsi_init_spe;
194         p_params = &p_hwfn->pf_params.iscsi_pf_params;
195         p_queue = &p_init->q_params;
196
197         /* Sanity */
198         if (p_params->num_queues > p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]) {
199                 DP_ERR(p_hwfn,
200                        "Cannot satisfy CQ amount. Queues requested %d, CQs available %d. Aborting function start\n",
201                        p_params->num_queues,
202                        p_hwfn->hw_info.feat_num[QED_ISCSI_CQ]);
203                 return -EINVAL;
204         }
205
206         SET_FIELD(p_init->hdr.flags,
207                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, ISCSI_SLOW_PATH_LAYER_CODE);
208         p_init->hdr.op_code = ISCSI_RAMROD_CMD_ID_INIT_FUNC;
209
210         val = p_params->half_way_close_timeout;
211         p_init->half_way_close_timeout = cpu_to_le16(val);
212         p_init->num_sq_pages_in_ring = p_params->num_sq_pages_in_ring;
213         p_init->num_r2tq_pages_in_ring = p_params->num_r2tq_pages_in_ring;
214         p_init->num_uhq_pages_in_ring = p_params->num_uhq_pages_in_ring;
215         p_init->ll2_rx_queue_id = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] +
216                                   p_params->ll2_ooo_queue_id;
217
218         p_init->func_params.log_page_size = p_params->log_page_size;
219         val = p_params->num_tasks;
220         p_init->func_params.num_tasks = cpu_to_le16(val);
221         p_init->debug_mode.flags = p_params->debug_mode;
222
223         DMA_REGPAIR_LE(p_queue->glbl_q_params_addr,
224                        p_params->glbl_q_params_addr);
225
226         val = p_params->cq_num_entries;
227         p_queue->cq_num_entries = cpu_to_le16(val);
228         val = p_params->cmdq_num_entries;
229         p_queue->cmdq_num_entries = cpu_to_le16(val);
230         p_queue->num_queues = p_params->num_queues;
231         dval = (u8)p_hwfn->hw_info.resc_start[QED_CMDQS_CQS];
232         p_queue->queue_relative_offset = (u8)dval;
233         p_queue->cq_sb_pi = p_params->gl_rq_pi;
234         p_queue->cmdq_sb_pi = p_params->gl_cmd_pi;
235
236         for (i = 0; i < p_params->num_queues; i++) {
237                 val = qed_get_igu_sb_id(p_hwfn, i);
238                 p_queue->cq_cmdq_sb_num_arr[i] = cpu_to_le16(val);
239         }
240
241         p_queue->bdq_resource_id = (u8)RESC_START(p_hwfn, QED_BDQ);
242
243         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_RQ],
244                        p_params->bdq_pbl_base_addr[BDQ_ID_RQ]);
245         p_queue->bdq_pbl_num_entries[BDQ_ID_RQ] =
246             p_params->bdq_pbl_num_entries[BDQ_ID_RQ];
247         val = p_params->bdq_xoff_threshold[BDQ_ID_RQ];
248         p_queue->bdq_xoff_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
249         val = p_params->bdq_xon_threshold[BDQ_ID_RQ];
250         p_queue->bdq_xon_threshold[BDQ_ID_RQ] = cpu_to_le16(val);
251
252         DMA_REGPAIR_LE(p_queue->bdq_pbl_base_address[BDQ_ID_IMM_DATA],
253                        p_params->bdq_pbl_base_addr[BDQ_ID_IMM_DATA]);
254         p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA] =
255             p_params->bdq_pbl_num_entries[BDQ_ID_IMM_DATA];
256         val = p_params->bdq_xoff_threshold[BDQ_ID_IMM_DATA];
257         p_queue->bdq_xoff_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
258         val = p_params->bdq_xon_threshold[BDQ_ID_IMM_DATA];
259         p_queue->bdq_xon_threshold[BDQ_ID_IMM_DATA] = cpu_to_le16(val);
260         val = p_params->rq_buffer_size;
261         p_queue->rq_buffer_size = cpu_to_le16(val);
262         if (p_params->is_target) {
263                 SET_FIELD(p_queue->q_validity,
264                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
265                 if (p_queue->bdq_pbl_num_entries[BDQ_ID_IMM_DATA])
266                         SET_FIELD(p_queue->q_validity,
267                                   SCSI_INIT_FUNC_QUEUES_IMM_DATA_VALID, 1);
268                 SET_FIELD(p_queue->q_validity,
269                           SCSI_INIT_FUNC_QUEUES_CMD_VALID, 1);
270         } else {
271                 SET_FIELD(p_queue->q_validity,
272                           SCSI_INIT_FUNC_QUEUES_RQ_VALID, 1);
273         }
274         p_ramrod->tcp_init.two_msl_timer = cpu_to_le32(p_params->two_msl_timer);
275         val = p_params->tx_sws_timer;
276         p_ramrod->tcp_init.tx_sws_timer = cpu_to_le16(val);
277         p_ramrod->tcp_init.max_fin_rt = p_params->max_fin_rt;
278
279         p_hwfn->p_iscsi_info->event_context = event_context;
280         p_hwfn->p_iscsi_info->event_cb = async_event_cb;
281
282         qed_spq_register_async_cb(p_hwfn, PROTOCOLID_ISCSI,
283                                   qed_iscsi_async_event);
284
285         return qed_spq_post(p_hwfn, p_ent, NULL);
286 }
287
288 static int qed_sp_iscsi_conn_offload(struct qed_hwfn *p_hwfn,
289                                      struct qed_iscsi_conn *p_conn,
290                                      enum spq_mode comp_mode,
291                                      struct qed_spq_comp_cb *p_comp_addr)
292 {
293         struct iscsi_spe_conn_offload *p_ramrod = NULL;
294         struct tcp_offload_params_opt2 *p_tcp2 = NULL;
295         struct tcp_offload_params *p_tcp = NULL;
296         struct qed_spq_entry *p_ent = NULL;
297         struct qed_sp_init_data init_data;
298         dma_addr_t r2tq_pbl_addr;
299         dma_addr_t xhq_pbl_addr;
300         dma_addr_t uhq_pbl_addr;
301         u16 physical_q;
302         int rc = 0;
303         u32 dval;
304         u16 wval;
305         u16 *p;
306         u8 i;
307
308         /* Get SPQ entry */
309         memset(&init_data, 0, sizeof(init_data));
310         init_data.cid = p_conn->icid;
311         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
312         init_data.comp_mode = comp_mode;
313         init_data.p_comp_data = p_comp_addr;
314
315         rc = qed_sp_init_request(p_hwfn, &p_ent,
316                                  ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN,
317                                  PROTOCOLID_ISCSI, &init_data);
318         if (rc)
319                 return rc;
320
321         p_ramrod = &p_ent->ramrod.iscsi_conn_offload;
322
323         /* Transmission PQ is the first of the PF */
324         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_OFLD);
325         p_conn->physical_q0 = cpu_to_le16(physical_q);
326         p_ramrod->iscsi.physical_q0 = cpu_to_le16(physical_q);
327
328         /* iSCSI Pure-ACK PQ */
329         physical_q = qed_get_cm_pq_idx(p_hwfn, PQ_FLAGS_ACK);
330         p_conn->physical_q1 = cpu_to_le16(physical_q);
331         p_ramrod->iscsi.physical_q1 = cpu_to_le16(physical_q);
332
333         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_OFFLOAD_CONN;
334         SET_FIELD(p_ramrod->hdr.flags, ISCSI_SLOW_PATH_HDR_LAYER_CODE,
335                   p_conn->layer_code);
336
337         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
338         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
339
340         DMA_REGPAIR_LE(p_ramrod->iscsi.sq_pbl_addr, p_conn->sq_pbl_addr);
341
342         r2tq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->r2tq);
343         DMA_REGPAIR_LE(p_ramrod->iscsi.r2tq_pbl_addr, r2tq_pbl_addr);
344
345         xhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->xhq);
346         DMA_REGPAIR_LE(p_ramrod->iscsi.xhq_pbl_addr, xhq_pbl_addr);
347
348         uhq_pbl_addr = qed_chain_get_pbl_phys(&p_conn->uhq);
349         DMA_REGPAIR_LE(p_ramrod->iscsi.uhq_pbl_addr, uhq_pbl_addr);
350
351         p_ramrod->iscsi.initial_ack = cpu_to_le32(p_conn->initial_ack);
352         p_ramrod->iscsi.flags = p_conn->offl_flags;
353         p_ramrod->iscsi.default_cq = p_conn->default_cq;
354         p_ramrod->iscsi.stat_sn = cpu_to_le32(p_conn->stat_sn);
355
356         if (!GET_FIELD(p_ramrod->iscsi.flags,
357                        ISCSI_CONN_OFFLOAD_PARAMS_TCP_ON_CHIP_1B)) {
358                 p_tcp = &p_ramrod->tcp;
359
360                 p = (u16 *)p_conn->local_mac;
361                 p_tcp->local_mac_addr_hi = swab16(get_unaligned(p));
362                 p_tcp->local_mac_addr_mid = swab16(get_unaligned(p + 1));
363                 p_tcp->local_mac_addr_lo = swab16(get_unaligned(p + 2));
364
365                 p = (u16 *)p_conn->remote_mac;
366                 p_tcp->remote_mac_addr_hi = swab16(get_unaligned(p));
367                 p_tcp->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
368                 p_tcp->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
369
370                 p_tcp->vlan_id = cpu_to_le16(p_conn->vlan_id);
371
372                 p_tcp->flags = cpu_to_le16(p_conn->tcp_flags);
373                 p_tcp->ip_version = p_conn->ip_version;
374                 for (i = 0; i < 4; i++) {
375                         dval = p_conn->remote_ip[i];
376                         p_tcp->remote_ip[i] = cpu_to_le32(dval);
377                         dval = p_conn->local_ip[i];
378                         p_tcp->local_ip[i] = cpu_to_le32(dval);
379                 }
380                 p_tcp->ka_max_probe_cnt = p_conn->ka_max_probe_cnt;
381                 p_tcp->dup_ack_theshold = p_conn->dup_ack_theshold;
382
383                 p_tcp->rcv_next = cpu_to_le32(p_conn->rcv_next);
384                 p_tcp->snd_una = cpu_to_le32(p_conn->snd_una);
385                 p_tcp->snd_next = cpu_to_le32(p_conn->snd_next);
386                 p_tcp->snd_max = cpu_to_le32(p_conn->snd_max);
387                 p_tcp->snd_wnd = cpu_to_le32(p_conn->snd_wnd);
388                 p_tcp->rcv_wnd = cpu_to_le32(p_conn->rcv_wnd);
389                 p_tcp->snd_wl1 = cpu_to_le32(p_conn->snd_wl1);
390                 p_tcp->cwnd = cpu_to_le32(p_conn->cwnd);
391                 p_tcp->ss_thresh = cpu_to_le32(p_conn->ss_thresh);
392                 p_tcp->srtt = cpu_to_le16(p_conn->srtt);
393                 p_tcp->rtt_var = cpu_to_le16(p_conn->rtt_var);
394                 p_tcp->ts_recent = cpu_to_le32(p_conn->ts_recent);
395                 p_tcp->ts_recent_age = cpu_to_le32(p_conn->ts_recent_age);
396                 p_tcp->total_rt = cpu_to_le32(p_conn->total_rt);
397                 dval = p_conn->ka_timeout_delta;
398                 p_tcp->ka_timeout_delta = cpu_to_le32(dval);
399                 dval = p_conn->rt_timeout_delta;
400                 p_tcp->rt_timeout_delta = cpu_to_le32(dval);
401                 p_tcp->dup_ack_cnt = p_conn->dup_ack_cnt;
402                 p_tcp->snd_wnd_probe_cnt = p_conn->snd_wnd_probe_cnt;
403                 p_tcp->ka_probe_cnt = p_conn->ka_probe_cnt;
404                 p_tcp->rt_cnt = p_conn->rt_cnt;
405                 p_tcp->flow_label = cpu_to_le32(p_conn->flow_label);
406                 p_tcp->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
407                 p_tcp->ka_interval = cpu_to_le32(p_conn->ka_interval);
408                 p_tcp->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
409                 dval = p_conn->initial_rcv_wnd;
410                 p_tcp->initial_rcv_wnd = cpu_to_le32(dval);
411                 p_tcp->ttl = p_conn->ttl;
412                 p_tcp->tos_or_tc = p_conn->tos_or_tc;
413                 p_tcp->remote_port = cpu_to_le16(p_conn->remote_port);
414                 p_tcp->local_port = cpu_to_le16(p_conn->local_port);
415                 p_tcp->mss = cpu_to_le16(p_conn->mss);
416                 p_tcp->snd_wnd_scale = p_conn->snd_wnd_scale;
417                 p_tcp->rcv_wnd_scale = p_conn->rcv_wnd_scale;
418                 wval = p_conn->da_timeout_value;
419                 p_tcp->da_timeout_value = cpu_to_le16(wval);
420                 p_tcp->ack_frequency = p_conn->ack_frequency;
421                 p_tcp->connect_mode = p_conn->connect_mode;
422         } else {
423                 p_tcp2 =
424                     &((struct iscsi_spe_conn_offload_option2 *)p_ramrod)->tcp;
425
426                 p = (u16 *)p_conn->local_mac;
427                 p_tcp2->local_mac_addr_hi = swab16(get_unaligned(p));
428                 p_tcp2->local_mac_addr_mid = swab16(get_unaligned(p + 1));
429                 p_tcp2->local_mac_addr_lo = swab16(get_unaligned(p + 2));
430
431                 p = (u16 *)p_conn->remote_mac;
432                 p_tcp2->remote_mac_addr_hi = swab16(get_unaligned(p));
433                 p_tcp2->remote_mac_addr_mid = swab16(get_unaligned(p + 1));
434                 p_tcp2->remote_mac_addr_lo = swab16(get_unaligned(p + 2));
435
436                 p_tcp2->vlan_id = cpu_to_le16(p_conn->vlan_id);
437                 p_tcp2->flags = cpu_to_le16(p_conn->tcp_flags);
438
439                 p_tcp2->ip_version = p_conn->ip_version;
440                 for (i = 0; i < 4; i++) {
441                         dval = p_conn->remote_ip[i];
442                         p_tcp2->remote_ip[i] = cpu_to_le32(dval);
443                         dval = p_conn->local_ip[i];
444                         p_tcp2->local_ip[i] = cpu_to_le32(dval);
445                 }
446
447                 p_tcp2->flow_label = cpu_to_le32(p_conn->flow_label);
448                 p_tcp2->ttl = p_conn->ttl;
449                 p_tcp2->tos_or_tc = p_conn->tos_or_tc;
450                 p_tcp2->remote_port = cpu_to_le16(p_conn->remote_port);
451                 p_tcp2->local_port = cpu_to_le16(p_conn->local_port);
452                 p_tcp2->mss = cpu_to_le16(p_conn->mss);
453                 p_tcp2->rcv_wnd_scale = p_conn->rcv_wnd_scale;
454                 p_tcp2->connect_mode = p_conn->connect_mode;
455                 wval = p_conn->syn_ip_payload_length;
456                 p_tcp2->syn_ip_payload_length = cpu_to_le16(wval);
457                 p_tcp2->syn_phy_addr_lo = DMA_LO_LE(p_conn->syn_phy_addr);
458                 p_tcp2->syn_phy_addr_hi = DMA_HI_LE(p_conn->syn_phy_addr);
459                 p_tcp2->cwnd = cpu_to_le32(p_conn->cwnd);
460                 p_tcp2->ka_max_probe_cnt = p_conn->ka_probe_cnt;
461                 p_tcp2->ka_timeout = cpu_to_le32(p_conn->ka_timeout);
462                 p_tcp2->max_rt_time = cpu_to_le32(p_conn->max_rt_time);
463                 p_tcp2->ka_interval = cpu_to_le32(p_conn->ka_interval);
464         }
465
466         return qed_spq_post(p_hwfn, p_ent, NULL);
467 }
468
469 static int qed_sp_iscsi_conn_update(struct qed_hwfn *p_hwfn,
470                                     struct qed_iscsi_conn *p_conn,
471                                     enum spq_mode comp_mode,
472                                     struct qed_spq_comp_cb *p_comp_addr)
473 {
474         struct iscsi_conn_update_ramrod_params *p_ramrod = NULL;
475         struct qed_spq_entry *p_ent = NULL;
476         struct qed_sp_init_data init_data;
477         int rc = -EINVAL;
478         u32 dval;
479
480         /* Get SPQ entry */
481         memset(&init_data, 0, sizeof(init_data));
482         init_data.cid = p_conn->icid;
483         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
484         init_data.comp_mode = comp_mode;
485         init_data.p_comp_data = p_comp_addr;
486
487         rc = qed_sp_init_request(p_hwfn, &p_ent,
488                                  ISCSI_RAMROD_CMD_ID_UPDATE_CONN,
489                                  PROTOCOLID_ISCSI, &init_data);
490         if (rc)
491                 return rc;
492
493         p_ramrod = &p_ent->ramrod.iscsi_conn_update;
494         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_UPDATE_CONN;
495         SET_FIELD(p_ramrod->hdr.flags,
496                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
497
498         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
499         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
500         p_ramrod->flags = p_conn->update_flag;
501         p_ramrod->max_seq_size = cpu_to_le32(p_conn->max_seq_size);
502         dval = p_conn->max_recv_pdu_length;
503         p_ramrod->max_recv_pdu_length = cpu_to_le32(dval);
504         dval = p_conn->max_send_pdu_length;
505         p_ramrod->max_send_pdu_length = cpu_to_le32(dval);
506         dval = p_conn->first_seq_length;
507         p_ramrod->first_seq_length = cpu_to_le32(dval);
508         p_ramrod->exp_stat_sn = cpu_to_le32(p_conn->exp_stat_sn);
509
510         return qed_spq_post(p_hwfn, p_ent, NULL);
511 }
512
513 static int
514 qed_sp_iscsi_mac_update(struct qed_hwfn *p_hwfn,
515                         struct qed_iscsi_conn *p_conn,
516                         enum spq_mode comp_mode,
517                         struct qed_spq_comp_cb *p_comp_addr)
518 {
519         struct iscsi_spe_conn_mac_update *p_ramrod = NULL;
520         struct qed_spq_entry *p_ent = NULL;
521         struct qed_sp_init_data init_data;
522         int rc = -EINVAL;
523         u8 ucval;
524
525         /* Get SPQ entry */
526         memset(&init_data, 0, sizeof(init_data));
527         init_data.cid = p_conn->icid;
528         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
529         init_data.comp_mode = comp_mode;
530         init_data.p_comp_data = p_comp_addr;
531
532         rc = qed_sp_init_request(p_hwfn, &p_ent,
533                                  ISCSI_RAMROD_CMD_ID_MAC_UPDATE,
534                                  PROTOCOLID_ISCSI, &init_data);
535         if (rc)
536                 return rc;
537
538         p_ramrod = &p_ent->ramrod.iscsi_conn_mac_update;
539         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_MAC_UPDATE;
540         SET_FIELD(p_ramrod->hdr.flags,
541                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
542
543         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
544         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
545         ucval = p_conn->remote_mac[1];
546         ((u8 *)(&p_ramrod->remote_mac_addr_hi))[0] = ucval;
547         ucval = p_conn->remote_mac[0];
548         ((u8 *)(&p_ramrod->remote_mac_addr_hi))[1] = ucval;
549         ucval = p_conn->remote_mac[3];
550         ((u8 *)(&p_ramrod->remote_mac_addr_mid))[0] = ucval;
551         ucval = p_conn->remote_mac[2];
552         ((u8 *)(&p_ramrod->remote_mac_addr_mid))[1] = ucval;
553         ucval = p_conn->remote_mac[5];
554         ((u8 *)(&p_ramrod->remote_mac_addr_lo))[0] = ucval;
555         ucval = p_conn->remote_mac[4];
556         ((u8 *)(&p_ramrod->remote_mac_addr_lo))[1] = ucval;
557
558         return qed_spq_post(p_hwfn, p_ent, NULL);
559 }
560
561 static int qed_sp_iscsi_conn_terminate(struct qed_hwfn *p_hwfn,
562                                        struct qed_iscsi_conn *p_conn,
563                                        enum spq_mode comp_mode,
564                                        struct qed_spq_comp_cb *p_comp_addr)
565 {
566         struct iscsi_spe_conn_termination *p_ramrod = NULL;
567         struct qed_spq_entry *p_ent = NULL;
568         struct qed_sp_init_data init_data;
569         int rc = -EINVAL;
570
571         /* Get SPQ entry */
572         memset(&init_data, 0, sizeof(init_data));
573         init_data.cid = p_conn->icid;
574         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
575         init_data.comp_mode = comp_mode;
576         init_data.p_comp_data = p_comp_addr;
577
578         rc = qed_sp_init_request(p_hwfn, &p_ent,
579                                  ISCSI_RAMROD_CMD_ID_TERMINATION_CONN,
580                                  PROTOCOLID_ISCSI, &init_data);
581         if (rc)
582                 return rc;
583
584         p_ramrod = &p_ent->ramrod.iscsi_conn_terminate;
585         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_TERMINATION_CONN;
586         SET_FIELD(p_ramrod->hdr.flags,
587                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
588
589         p_ramrod->conn_id = cpu_to_le16(p_conn->conn_id);
590         p_ramrod->fw_cid = cpu_to_le32(p_conn->icid);
591         p_ramrod->abortive = p_conn->abortive_dsconnect;
592
593         DMA_REGPAIR_LE(p_ramrod->query_params_addr,
594                        p_conn->tcp_upload_params_phys_addr);
595         DMA_REGPAIR_LE(p_ramrod->queue_cnts_addr, p_conn->queue_cnts_phys_addr);
596
597         return qed_spq_post(p_hwfn, p_ent, NULL);
598 }
599
600 static int qed_sp_iscsi_conn_clear_sq(struct qed_hwfn *p_hwfn,
601                                       struct qed_iscsi_conn *p_conn,
602                                       enum spq_mode comp_mode,
603                                       struct qed_spq_comp_cb *p_comp_addr)
604 {
605         struct iscsi_slow_path_hdr *p_ramrod = NULL;
606         struct qed_spq_entry *p_ent = NULL;
607         struct qed_sp_init_data init_data;
608         int rc = -EINVAL;
609
610         /* Get SPQ entry */
611         memset(&init_data, 0, sizeof(init_data));
612         init_data.cid = p_conn->icid;
613         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
614         init_data.comp_mode = comp_mode;
615         init_data.p_comp_data = p_comp_addr;
616
617         rc = qed_sp_init_request(p_hwfn, &p_ent,
618                                  ISCSI_RAMROD_CMD_ID_CLEAR_SQ,
619                                  PROTOCOLID_ISCSI, &init_data);
620         if (rc)
621                 return rc;
622
623         p_ramrod = &p_ent->ramrod.iscsi_empty;
624         p_ramrod->op_code = ISCSI_RAMROD_CMD_ID_CLEAR_SQ;
625         SET_FIELD(p_ramrod->flags,
626                   ISCSI_SLOW_PATH_HDR_LAYER_CODE, p_conn->layer_code);
627
628         return qed_spq_post(p_hwfn, p_ent, NULL);
629 }
630
631 static int qed_sp_iscsi_func_stop(struct qed_hwfn *p_hwfn,
632                                   enum spq_mode comp_mode,
633                                   struct qed_spq_comp_cb *p_comp_addr)
634 {
635         struct iscsi_spe_func_dstry *p_ramrod = NULL;
636         struct qed_spq_entry *p_ent = NULL;
637         struct qed_sp_init_data init_data;
638         int rc = 0;
639
640         /* Get SPQ entry */
641         memset(&init_data, 0, sizeof(init_data));
642         init_data.cid = qed_spq_get_cid(p_hwfn);
643         init_data.opaque_fid = p_hwfn->hw_info.opaque_fid;
644         init_data.comp_mode = comp_mode;
645         init_data.p_comp_data = p_comp_addr;
646
647         rc = qed_sp_init_request(p_hwfn, &p_ent,
648                                  ISCSI_RAMROD_CMD_ID_DESTROY_FUNC,
649                                  PROTOCOLID_ISCSI, &init_data);
650         if (rc)
651                 return rc;
652
653         p_ramrod = &p_ent->ramrod.iscsi_destroy;
654         p_ramrod->hdr.op_code = ISCSI_RAMROD_CMD_ID_DESTROY_FUNC;
655
656         rc = qed_spq_post(p_hwfn, p_ent, NULL);
657
658         qed_spq_unregister_async_cb(p_hwfn, PROTOCOLID_ISCSI);
659         return rc;
660 }
661
662 static void __iomem *qed_iscsi_get_db_addr(struct qed_hwfn *p_hwfn, u32 cid)
663 {
664         return (u8 __iomem *)p_hwfn->doorbells +
665                              qed_db_addr(cid, DQ_DEMS_LEGACY);
666 }
667
668 static void __iomem *qed_iscsi_get_primary_bdq_prod(struct qed_hwfn *p_hwfn,
669                                                     u8 bdq_id)
670 {
671         if (RESC_NUM(p_hwfn, QED_BDQ)) {
672                 return (u8 __iomem *)p_hwfn->regview +
673                        GTT_BAR0_MAP_REG_MSDM_RAM +
674                        MSTORM_SCSI_BDQ_EXT_PROD_OFFSET(RESC_START(p_hwfn,
675                                                                   QED_BDQ),
676                                                        bdq_id);
677         } else {
678                 DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
679                 return NULL;
680         }
681 }
682
683 static void __iomem *qed_iscsi_get_secondary_bdq_prod(struct qed_hwfn *p_hwfn,
684                                                       u8 bdq_id)
685 {
686         if (RESC_NUM(p_hwfn, QED_BDQ)) {
687                 return (u8 __iomem *)p_hwfn->regview +
688                        GTT_BAR0_MAP_REG_TSDM_RAM +
689                        TSTORM_SCSI_BDQ_EXT_PROD_OFFSET(RESC_START(p_hwfn,
690                                                                   QED_BDQ),
691                                                        bdq_id);
692         } else {
693                 DP_NOTICE(p_hwfn, "BDQ is not allocated!\n");
694                 return NULL;
695         }
696 }
697
698 static int qed_iscsi_setup_connection(struct qed_iscsi_conn *p_conn)
699 {
700         if (!p_conn->queue_cnts_virt_addr)
701                 goto nomem;
702         memset(p_conn->queue_cnts_virt_addr, 0,
703                sizeof(*p_conn->queue_cnts_virt_addr));
704
705         if (!p_conn->tcp_upload_params_virt_addr)
706                 goto nomem;
707         memset(p_conn->tcp_upload_params_virt_addr, 0,
708                sizeof(*p_conn->tcp_upload_params_virt_addr));
709
710         if (!p_conn->r2tq.p_virt_addr)
711                 goto nomem;
712         qed_chain_pbl_zero_mem(&p_conn->r2tq);
713
714         if (!p_conn->uhq.p_virt_addr)
715                 goto nomem;
716         qed_chain_pbl_zero_mem(&p_conn->uhq);
717
718         if (!p_conn->xhq.p_virt_addr)
719                 goto nomem;
720         qed_chain_pbl_zero_mem(&p_conn->xhq);
721
722         return 0;
723 nomem:
724         return -ENOMEM;
725 }
726
727 static int qed_iscsi_allocate_connection(struct qed_hwfn *p_hwfn,
728                                          struct qed_iscsi_conn **p_out_conn)
729 {
730         u16 uhq_num_elements = 0, xhq_num_elements = 0, r2tq_num_elements = 0;
731         struct scsi_terminate_extra_params *p_q_cnts = NULL;
732         struct qed_iscsi_pf_params *p_params = NULL;
733         struct tcp_upload_params *p_tcp = NULL;
734         struct qed_iscsi_conn *p_conn = NULL;
735         int rc = 0;
736
737         /* Try finding a free connection that can be used */
738         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
739         if (!list_empty(&p_hwfn->p_iscsi_info->free_list))
740                 p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
741                                           struct qed_iscsi_conn, list_entry);
742         if (p_conn) {
743                 list_del(&p_conn->list_entry);
744                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
745                 *p_out_conn = p_conn;
746                 return 0;
747         }
748         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
749
750         /* Need to allocate a new connection */
751         p_params = &p_hwfn->pf_params.iscsi_pf_params;
752
753         p_conn = kzalloc(sizeof(*p_conn), GFP_KERNEL);
754         if (!p_conn)
755                 return -ENOMEM;
756
757         p_q_cnts = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
758                                       sizeof(*p_q_cnts),
759                                       &p_conn->queue_cnts_phys_addr,
760                                       GFP_KERNEL);
761         if (!p_q_cnts)
762                 goto nomem_queue_cnts_param;
763         p_conn->queue_cnts_virt_addr = p_q_cnts;
764
765         p_tcp = dma_alloc_coherent(&p_hwfn->cdev->pdev->dev,
766                                    sizeof(*p_tcp),
767                                    &p_conn->tcp_upload_params_phys_addr,
768                                    GFP_KERNEL);
769         if (!p_tcp)
770                 goto nomem_upload_param;
771         p_conn->tcp_upload_params_virt_addr = p_tcp;
772
773         r2tq_num_elements = p_params->num_r2tq_pages_in_ring *
774                             QED_CHAIN_PAGE_SIZE / 0x80;
775         rc = qed_chain_alloc(p_hwfn->cdev,
776                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
777                              QED_CHAIN_MODE_PBL,
778                              QED_CHAIN_CNT_TYPE_U16,
779                              r2tq_num_elements, 0x80, &p_conn->r2tq, NULL);
780         if (rc)
781                 goto nomem_r2tq;
782
783         uhq_num_elements = p_params->num_uhq_pages_in_ring *
784                            QED_CHAIN_PAGE_SIZE / sizeof(struct iscsi_uhqe);
785         rc = qed_chain_alloc(p_hwfn->cdev,
786                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
787                              QED_CHAIN_MODE_PBL,
788                              QED_CHAIN_CNT_TYPE_U16,
789                              uhq_num_elements,
790                              sizeof(struct iscsi_uhqe), &p_conn->uhq, NULL);
791         if (rc)
792                 goto nomem_uhq;
793
794         xhq_num_elements = uhq_num_elements;
795         rc = qed_chain_alloc(p_hwfn->cdev,
796                              QED_CHAIN_USE_TO_CONSUME_PRODUCE,
797                              QED_CHAIN_MODE_PBL,
798                              QED_CHAIN_CNT_TYPE_U16,
799                              xhq_num_elements,
800                              sizeof(struct iscsi_xhqe), &p_conn->xhq, NULL);
801         if (rc)
802                 goto nomem;
803
804         p_conn->free_on_delete = true;
805         *p_out_conn = p_conn;
806         return 0;
807
808 nomem:
809         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
810 nomem_uhq:
811         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
812 nomem_r2tq:
813         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
814                           sizeof(struct tcp_upload_params),
815                           p_conn->tcp_upload_params_virt_addr,
816                           p_conn->tcp_upload_params_phys_addr);
817 nomem_upload_param:
818         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
819                           sizeof(struct scsi_terminate_extra_params),
820                           p_conn->queue_cnts_virt_addr,
821                           p_conn->queue_cnts_phys_addr);
822 nomem_queue_cnts_param:
823         kfree(p_conn);
824
825         return -ENOMEM;
826 }
827
828 static int qed_iscsi_acquire_connection(struct qed_hwfn *p_hwfn,
829                                         struct qed_iscsi_conn *p_in_conn,
830                                         struct qed_iscsi_conn **p_out_conn)
831 {
832         struct qed_iscsi_conn *p_conn = NULL;
833         int rc = 0;
834         u32 icid;
835
836         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
837         rc = qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_ISCSI, &icid);
838         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
839         if (rc)
840                 return rc;
841
842         /* Use input connection or allocate a new one */
843         if (p_in_conn)
844                 p_conn = p_in_conn;
845         else
846                 rc = qed_iscsi_allocate_connection(p_hwfn, &p_conn);
847
848         if (!rc)
849                 rc = qed_iscsi_setup_connection(p_conn);
850
851         if (rc) {
852                 spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
853                 qed_cxt_release_cid(p_hwfn, icid);
854                 spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
855                 return rc;
856         }
857
858         p_conn->icid = icid;
859         p_conn->conn_id = (u16)icid;
860         p_conn->fw_cid = (p_hwfn->hw_info.opaque_fid << 16) | icid;
861
862         *p_out_conn = p_conn;
863
864         return rc;
865 }
866
867 static void qed_iscsi_release_connection(struct qed_hwfn *p_hwfn,
868                                          struct qed_iscsi_conn *p_conn)
869 {
870         spin_lock_bh(&p_hwfn->p_iscsi_info->lock);
871         list_add_tail(&p_conn->list_entry, &p_hwfn->p_iscsi_info->free_list);
872         qed_cxt_release_cid(p_hwfn, p_conn->icid);
873         spin_unlock_bh(&p_hwfn->p_iscsi_info->lock);
874 }
875
876 static void qed_iscsi_free_connection(struct qed_hwfn *p_hwfn,
877                                       struct qed_iscsi_conn *p_conn)
878 {
879         qed_chain_free(p_hwfn->cdev, &p_conn->xhq);
880         qed_chain_free(p_hwfn->cdev, &p_conn->uhq);
881         qed_chain_free(p_hwfn->cdev, &p_conn->r2tq);
882         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
883                           sizeof(struct tcp_upload_params),
884                           p_conn->tcp_upload_params_virt_addr,
885                           p_conn->tcp_upload_params_phys_addr);
886         dma_free_coherent(&p_hwfn->cdev->pdev->dev,
887                           sizeof(struct scsi_terminate_extra_params),
888                           p_conn->queue_cnts_virt_addr,
889                           p_conn->queue_cnts_phys_addr);
890         kfree(p_conn);
891 }
892
893 int qed_iscsi_alloc(struct qed_hwfn *p_hwfn)
894 {
895         struct qed_iscsi_info *p_iscsi_info;
896
897         p_iscsi_info = kzalloc(sizeof(*p_iscsi_info), GFP_KERNEL);
898         if (!p_iscsi_info)
899                 return -ENOMEM;
900
901         INIT_LIST_HEAD(&p_iscsi_info->free_list);
902
903         p_hwfn->p_iscsi_info = p_iscsi_info;
904         return 0;
905 }
906
907 void qed_iscsi_setup(struct qed_hwfn *p_hwfn)
908 {
909         spin_lock_init(&p_hwfn->p_iscsi_info->lock);
910 }
911
912 void qed_iscsi_free(struct qed_hwfn *p_hwfn)
913 {
914         struct qed_iscsi_conn *p_conn = NULL;
915
916         if (!p_hwfn->p_iscsi_info)
917                 return;
918
919         while (!list_empty(&p_hwfn->p_iscsi_info->free_list)) {
920                 p_conn = list_first_entry(&p_hwfn->p_iscsi_info->free_list,
921                                           struct qed_iscsi_conn, list_entry);
922                 if (p_conn) {
923                         list_del(&p_conn->list_entry);
924                         qed_iscsi_free_connection(p_hwfn, p_conn);
925                 }
926         }
927
928         kfree(p_hwfn->p_iscsi_info);
929         p_hwfn->p_iscsi_info = NULL;
930 }
931
932 static void _qed_iscsi_get_tstats(struct qed_hwfn *p_hwfn,
933                                   struct qed_ptt *p_ptt,
934                                   struct qed_iscsi_stats *p_stats)
935 {
936         struct tstorm_iscsi_stats_drv tstats;
937         u32 tstats_addr;
938
939         memset(&tstats, 0, sizeof(tstats));
940         tstats_addr = BAR0_MAP_REG_TSDM_RAM +
941                       TSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
942         qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats));
943
944         p_stats->iscsi_rx_bytes_cnt =
945             HILO_64_REGPAIR(tstats.iscsi_rx_bytes_cnt);
946         p_stats->iscsi_rx_packet_cnt =
947             HILO_64_REGPAIR(tstats.iscsi_rx_packet_cnt);
948         p_stats->iscsi_rx_new_ooo_isle_events_cnt =
949             HILO_64_REGPAIR(tstats.iscsi_rx_new_ooo_isle_events_cnt);
950         p_stats->iscsi_cmdq_threshold_cnt =
951             le32_to_cpu(tstats.iscsi_cmdq_threshold_cnt);
952         p_stats->iscsi_rq_threshold_cnt =
953             le32_to_cpu(tstats.iscsi_rq_threshold_cnt);
954         p_stats->iscsi_immq_threshold_cnt =
955             le32_to_cpu(tstats.iscsi_immq_threshold_cnt);
956 }
957
958 static void _qed_iscsi_get_mstats(struct qed_hwfn *p_hwfn,
959                                   struct qed_ptt *p_ptt,
960                                   struct qed_iscsi_stats *p_stats)
961 {
962         struct mstorm_iscsi_stats_drv mstats;
963         u32 mstats_addr;
964
965         memset(&mstats, 0, sizeof(mstats));
966         mstats_addr = BAR0_MAP_REG_MSDM_RAM +
967                       MSTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
968         qed_memcpy_from(p_hwfn, p_ptt, &mstats, mstats_addr, sizeof(mstats));
969
970         p_stats->iscsi_rx_dropped_pdus_task_not_valid =
971             HILO_64_REGPAIR(mstats.iscsi_rx_dropped_pdus_task_not_valid);
972 }
973
974 static void _qed_iscsi_get_ustats(struct qed_hwfn *p_hwfn,
975                                   struct qed_ptt *p_ptt,
976                                   struct qed_iscsi_stats *p_stats)
977 {
978         struct ustorm_iscsi_stats_drv ustats;
979         u32 ustats_addr;
980
981         memset(&ustats, 0, sizeof(ustats));
982         ustats_addr = BAR0_MAP_REG_USDM_RAM +
983                       USTORM_ISCSI_RX_STATS_OFFSET(p_hwfn->rel_pf_id);
984         qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats));
985
986         p_stats->iscsi_rx_data_pdu_cnt =
987             HILO_64_REGPAIR(ustats.iscsi_rx_data_pdu_cnt);
988         p_stats->iscsi_rx_r2t_pdu_cnt =
989             HILO_64_REGPAIR(ustats.iscsi_rx_r2t_pdu_cnt);
990         p_stats->iscsi_rx_total_pdu_cnt =
991             HILO_64_REGPAIR(ustats.iscsi_rx_total_pdu_cnt);
992 }
993
994 static void _qed_iscsi_get_xstats(struct qed_hwfn *p_hwfn,
995                                   struct qed_ptt *p_ptt,
996                                   struct qed_iscsi_stats *p_stats)
997 {
998         struct xstorm_iscsi_stats_drv xstats;
999         u32 xstats_addr;
1000
1001         memset(&xstats, 0, sizeof(xstats));
1002         xstats_addr = BAR0_MAP_REG_XSDM_RAM +
1003                       XSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1004         qed_memcpy_from(p_hwfn, p_ptt, &xstats, xstats_addr, sizeof(xstats));
1005
1006         p_stats->iscsi_tx_go_to_slow_start_event_cnt =
1007             HILO_64_REGPAIR(xstats.iscsi_tx_go_to_slow_start_event_cnt);
1008         p_stats->iscsi_tx_fast_retransmit_event_cnt =
1009             HILO_64_REGPAIR(xstats.iscsi_tx_fast_retransmit_event_cnt);
1010 }
1011
1012 static void _qed_iscsi_get_ystats(struct qed_hwfn *p_hwfn,
1013                                   struct qed_ptt *p_ptt,
1014                                   struct qed_iscsi_stats *p_stats)
1015 {
1016         struct ystorm_iscsi_stats_drv ystats;
1017         u32 ystats_addr;
1018
1019         memset(&ystats, 0, sizeof(ystats));
1020         ystats_addr = BAR0_MAP_REG_YSDM_RAM +
1021                       YSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1022         qed_memcpy_from(p_hwfn, p_ptt, &ystats, ystats_addr, sizeof(ystats));
1023
1024         p_stats->iscsi_tx_data_pdu_cnt =
1025             HILO_64_REGPAIR(ystats.iscsi_tx_data_pdu_cnt);
1026         p_stats->iscsi_tx_r2t_pdu_cnt =
1027             HILO_64_REGPAIR(ystats.iscsi_tx_r2t_pdu_cnt);
1028         p_stats->iscsi_tx_total_pdu_cnt =
1029             HILO_64_REGPAIR(ystats.iscsi_tx_total_pdu_cnt);
1030 }
1031
1032 static void _qed_iscsi_get_pstats(struct qed_hwfn *p_hwfn,
1033                                   struct qed_ptt *p_ptt,
1034                                   struct qed_iscsi_stats *p_stats)
1035 {
1036         struct pstorm_iscsi_stats_drv pstats;
1037         u32 pstats_addr;
1038
1039         memset(&pstats, 0, sizeof(pstats));
1040         pstats_addr = BAR0_MAP_REG_PSDM_RAM +
1041                       PSTORM_ISCSI_TX_STATS_OFFSET(p_hwfn->rel_pf_id);
1042         qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats));
1043
1044         p_stats->iscsi_tx_bytes_cnt =
1045             HILO_64_REGPAIR(pstats.iscsi_tx_bytes_cnt);
1046         p_stats->iscsi_tx_packet_cnt =
1047             HILO_64_REGPAIR(pstats.iscsi_tx_packet_cnt);
1048 }
1049
1050 static int qed_iscsi_get_stats(struct qed_hwfn *p_hwfn,
1051                                struct qed_iscsi_stats *stats)
1052 {
1053         struct qed_ptt *p_ptt;
1054
1055         memset(stats, 0, sizeof(*stats));
1056
1057         p_ptt = qed_ptt_acquire(p_hwfn);
1058         if (!p_ptt) {
1059                 DP_ERR(p_hwfn, "Failed to acquire ptt\n");
1060                 return -EAGAIN;
1061         }
1062
1063         _qed_iscsi_get_tstats(p_hwfn, p_ptt, stats);
1064         _qed_iscsi_get_mstats(p_hwfn, p_ptt, stats);
1065         _qed_iscsi_get_ustats(p_hwfn, p_ptt, stats);
1066
1067         _qed_iscsi_get_xstats(p_hwfn, p_ptt, stats);
1068         _qed_iscsi_get_ystats(p_hwfn, p_ptt, stats);
1069         _qed_iscsi_get_pstats(p_hwfn, p_ptt, stats);
1070
1071         qed_ptt_release(p_hwfn, p_ptt);
1072
1073         return 0;
1074 }
1075
1076 struct qed_hash_iscsi_con {
1077         struct hlist_node node;
1078         struct qed_iscsi_conn *con;
1079 };
1080
1081 static int qed_fill_iscsi_dev_info(struct qed_dev *cdev,
1082                                    struct qed_dev_iscsi_info *info)
1083 {
1084         struct qed_hwfn *hwfn = QED_LEADING_HWFN(cdev);
1085
1086         int rc;
1087
1088         memset(info, 0, sizeof(*info));
1089         rc = qed_fill_dev_info(cdev, &info->common);
1090
1091         info->primary_dbq_rq_addr =
1092             qed_iscsi_get_primary_bdq_prod(hwfn, BDQ_ID_RQ);
1093         info->secondary_bdq_rq_addr =
1094             qed_iscsi_get_secondary_bdq_prod(hwfn, BDQ_ID_RQ);
1095
1096         info->num_cqs = FEAT_NUM(hwfn, QED_ISCSI_CQ);
1097
1098         return rc;
1099 }
1100
1101 static void qed_register_iscsi_ops(struct qed_dev *cdev,
1102                                    struct qed_iscsi_cb_ops *ops, void *cookie)
1103 {
1104         cdev->protocol_ops.iscsi = ops;
1105         cdev->ops_cookie = cookie;
1106 }
1107
1108 static struct qed_hash_iscsi_con *qed_iscsi_get_hash(struct qed_dev *cdev,
1109                                                      u32 handle)
1110 {
1111         struct qed_hash_iscsi_con *hash_con = NULL;
1112
1113         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED))
1114                 return NULL;
1115
1116         hash_for_each_possible(cdev->connections, hash_con, node, handle) {
1117                 if (hash_con->con->icid == handle)
1118                         break;
1119         }
1120
1121         if (!hash_con || (hash_con->con->icid != handle))
1122                 return NULL;
1123
1124         return hash_con;
1125 }
1126
1127 static int qed_iscsi_stop(struct qed_dev *cdev)
1128 {
1129         int rc;
1130
1131         if (!(cdev->flags & QED_FLAG_STORAGE_STARTED)) {
1132                 DP_NOTICE(cdev, "iscsi already stopped\n");
1133                 return 0;
1134         }
1135
1136         if (!hash_empty(cdev->connections)) {
1137                 DP_NOTICE(cdev,
1138                           "Can't stop iscsi - not all connections were returned\n");
1139                 return -EINVAL;
1140         }
1141
1142         /* Stop the iscsi */
1143         rc = qed_sp_iscsi_func_stop(QED_LEADING_HWFN(cdev),
1144                                     QED_SPQ_MODE_EBLOCK, NULL);
1145         cdev->flags &= ~QED_FLAG_STORAGE_STARTED;
1146
1147         return rc;
1148 }
1149
1150 static int qed_iscsi_start(struct qed_dev *cdev,
1151                            struct qed_iscsi_tid *tasks,
1152                            void *event_context,
1153                            iscsi_event_cb_t async_event_cb)
1154 {
1155         int rc;
1156         struct qed_tid_mem *tid_info;
1157
1158         if (cdev->flags & QED_FLAG_STORAGE_STARTED) {
1159                 DP_NOTICE(cdev, "iscsi already started;\n");
1160                 return 0;
1161         }
1162
1163         rc = qed_sp_iscsi_func_start(QED_LEADING_HWFN(cdev),
1164                                      QED_SPQ_MODE_EBLOCK, NULL, event_context,
1165                                      async_event_cb);
1166         if (rc) {
1167                 DP_NOTICE(cdev, "Failed to start iscsi\n");
1168                 return rc;
1169         }
1170
1171         cdev->flags |= QED_FLAG_STORAGE_STARTED;
1172         hash_init(cdev->connections);
1173
1174         if (!tasks)
1175                 return 0;
1176
1177         tid_info = kzalloc(sizeof(*tid_info), GFP_KERNEL);
1178
1179         if (!tid_info) {
1180                 qed_iscsi_stop(cdev);
1181                 return -ENOMEM;
1182         }
1183
1184         rc = qed_cxt_get_tid_mem_info(QED_LEADING_HWFN(cdev),
1185                                       tid_info);
1186         if (rc) {
1187                 DP_NOTICE(cdev, "Failed to gather task information\n");
1188                 qed_iscsi_stop(cdev);
1189                 kfree(tid_info);
1190                 return rc;
1191         }
1192
1193         /* Fill task information */
1194         tasks->size = tid_info->tid_size;
1195         tasks->num_tids_per_block = tid_info->num_tids_per_block;
1196         memcpy(tasks->blocks, tid_info->blocks,
1197                MAX_TID_BLOCKS_ISCSI * sizeof(u8 *));
1198
1199         kfree(tid_info);
1200
1201         return 0;
1202 }
1203
1204 static int qed_iscsi_acquire_conn(struct qed_dev *cdev,
1205                                   u32 *handle,
1206                                   u32 *fw_cid, void __iomem **p_doorbell)
1207 {
1208         struct qed_hash_iscsi_con *hash_con;
1209         int rc;
1210
1211         /* Allocate a hashed connection */
1212         hash_con = kzalloc(sizeof(*hash_con), GFP_ATOMIC);
1213         if (!hash_con)
1214                 return -ENOMEM;
1215
1216         /* Acquire the connection */
1217         rc = qed_iscsi_acquire_connection(QED_LEADING_HWFN(cdev), NULL,
1218                                           &hash_con->con);
1219         if (rc) {
1220                 DP_NOTICE(cdev, "Failed to acquire Connection\n");
1221                 kfree(hash_con);
1222                 return rc;
1223         }
1224
1225         /* Added the connection to hash table */
1226         *handle = hash_con->con->icid;
1227         *fw_cid = hash_con->con->fw_cid;
1228         hash_add(cdev->connections, &hash_con->node, *handle);
1229
1230         if (p_doorbell)
1231                 *p_doorbell = qed_iscsi_get_db_addr(QED_LEADING_HWFN(cdev),
1232                                                     *handle);
1233
1234         return 0;
1235 }
1236
1237 static int qed_iscsi_release_conn(struct qed_dev *cdev, u32 handle)
1238 {
1239         struct qed_hash_iscsi_con *hash_con;
1240
1241         hash_con = qed_iscsi_get_hash(cdev, handle);
1242         if (!hash_con) {
1243                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1244                           handle);
1245                 return -EINVAL;
1246         }
1247
1248         hlist_del(&hash_con->node);
1249         qed_iscsi_release_connection(QED_LEADING_HWFN(cdev), hash_con->con);
1250         kfree(hash_con);
1251
1252         return 0;
1253 }
1254
1255 static int qed_iscsi_offload_conn(struct qed_dev *cdev,
1256                                   u32 handle,
1257                                   struct qed_iscsi_params_offload *conn_info)
1258 {
1259         struct qed_hash_iscsi_con *hash_con;
1260         struct qed_iscsi_conn *con;
1261
1262         hash_con = qed_iscsi_get_hash(cdev, handle);
1263         if (!hash_con) {
1264                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1265                           handle);
1266                 return -EINVAL;
1267         }
1268
1269         /* Update the connection with information from the params */
1270         con = hash_con->con;
1271
1272         ether_addr_copy(con->local_mac, conn_info->src.mac);
1273         ether_addr_copy(con->remote_mac, conn_info->dst.mac);
1274         memcpy(con->local_ip, conn_info->src.ip, sizeof(con->local_ip));
1275         memcpy(con->remote_ip, conn_info->dst.ip, sizeof(con->remote_ip));
1276         con->local_port = conn_info->src.port;
1277         con->remote_port = conn_info->dst.port;
1278
1279         con->layer_code = conn_info->layer_code;
1280         con->sq_pbl_addr = conn_info->sq_pbl_addr;
1281         con->initial_ack = conn_info->initial_ack;
1282         con->vlan_id = conn_info->vlan_id;
1283         con->tcp_flags = conn_info->tcp_flags;
1284         con->ip_version = conn_info->ip_version;
1285         con->default_cq = conn_info->default_cq;
1286         con->ka_max_probe_cnt = conn_info->ka_max_probe_cnt;
1287         con->dup_ack_theshold = conn_info->dup_ack_theshold;
1288         con->rcv_next = conn_info->rcv_next;
1289         con->snd_una = conn_info->snd_una;
1290         con->snd_next = conn_info->snd_next;
1291         con->snd_max = conn_info->snd_max;
1292         con->snd_wnd = conn_info->snd_wnd;
1293         con->rcv_wnd = conn_info->rcv_wnd;
1294         con->snd_wl1 = conn_info->snd_wl1;
1295         con->cwnd = conn_info->cwnd;
1296         con->ss_thresh = conn_info->ss_thresh;
1297         con->srtt = conn_info->srtt;
1298         con->rtt_var = conn_info->rtt_var;
1299         con->ts_recent = conn_info->ts_recent;
1300         con->ts_recent_age = conn_info->ts_recent_age;
1301         con->total_rt = conn_info->total_rt;
1302         con->ka_timeout_delta = conn_info->ka_timeout_delta;
1303         con->rt_timeout_delta = conn_info->rt_timeout_delta;
1304         con->dup_ack_cnt = conn_info->dup_ack_cnt;
1305         con->snd_wnd_probe_cnt = conn_info->snd_wnd_probe_cnt;
1306         con->ka_probe_cnt = conn_info->ka_probe_cnt;
1307         con->rt_cnt = conn_info->rt_cnt;
1308         con->flow_label = conn_info->flow_label;
1309         con->ka_timeout = conn_info->ka_timeout;
1310         con->ka_interval = conn_info->ka_interval;
1311         con->max_rt_time = conn_info->max_rt_time;
1312         con->initial_rcv_wnd = conn_info->initial_rcv_wnd;
1313         con->ttl = conn_info->ttl;
1314         con->tos_or_tc = conn_info->tos_or_tc;
1315         con->remote_port = conn_info->remote_port;
1316         con->local_port = conn_info->local_port;
1317         con->mss = conn_info->mss;
1318         con->snd_wnd_scale = conn_info->snd_wnd_scale;
1319         con->rcv_wnd_scale = conn_info->rcv_wnd_scale;
1320         con->da_timeout_value = conn_info->da_timeout_value;
1321         con->ack_frequency = conn_info->ack_frequency;
1322
1323         /* Set default values on other connection fields */
1324         con->offl_flags = 0x1;
1325
1326         return qed_sp_iscsi_conn_offload(QED_LEADING_HWFN(cdev), con,
1327                                          QED_SPQ_MODE_EBLOCK, NULL);
1328 }
1329
1330 static int qed_iscsi_update_conn(struct qed_dev *cdev,
1331                                  u32 handle,
1332                                  struct qed_iscsi_params_update *conn_info)
1333 {
1334         struct qed_hash_iscsi_con *hash_con;
1335         struct qed_iscsi_conn *con;
1336
1337         hash_con = qed_iscsi_get_hash(cdev, handle);
1338         if (!hash_con) {
1339                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1340                           handle);
1341                 return -EINVAL;
1342         }
1343
1344         /* Update the connection with information from the params */
1345         con = hash_con->con;
1346         con->update_flag = conn_info->update_flag;
1347         con->max_seq_size = conn_info->max_seq_size;
1348         con->max_recv_pdu_length = conn_info->max_recv_pdu_length;
1349         con->max_send_pdu_length = conn_info->max_send_pdu_length;
1350         con->first_seq_length = conn_info->first_seq_length;
1351         con->exp_stat_sn = conn_info->exp_stat_sn;
1352
1353         return qed_sp_iscsi_conn_update(QED_LEADING_HWFN(cdev), con,
1354                                         QED_SPQ_MODE_EBLOCK, NULL);
1355 }
1356
1357 static int qed_iscsi_clear_conn_sq(struct qed_dev *cdev, u32 handle)
1358 {
1359         struct qed_hash_iscsi_con *hash_con;
1360
1361         hash_con = qed_iscsi_get_hash(cdev, handle);
1362         if (!hash_con) {
1363                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1364                           handle);
1365                 return -EINVAL;
1366         }
1367
1368         return qed_sp_iscsi_conn_clear_sq(QED_LEADING_HWFN(cdev),
1369                                           hash_con->con,
1370                                           QED_SPQ_MODE_EBLOCK, NULL);
1371 }
1372
1373 static int qed_iscsi_destroy_conn(struct qed_dev *cdev,
1374                                   u32 handle, u8 abrt_conn)
1375 {
1376         struct qed_hash_iscsi_con *hash_con;
1377
1378         hash_con = qed_iscsi_get_hash(cdev, handle);
1379         if (!hash_con) {
1380                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1381                           handle);
1382                 return -EINVAL;
1383         }
1384
1385         hash_con->con->abortive_dsconnect = abrt_conn;
1386
1387         return qed_sp_iscsi_conn_terminate(QED_LEADING_HWFN(cdev),
1388                                            hash_con->con,
1389                                            QED_SPQ_MODE_EBLOCK, NULL);
1390 }
1391
1392 static int qed_iscsi_stats(struct qed_dev *cdev, struct qed_iscsi_stats *stats)
1393 {
1394         return qed_iscsi_get_stats(QED_LEADING_HWFN(cdev), stats);
1395 }
1396
1397 static int qed_iscsi_change_mac(struct qed_dev *cdev,
1398                                 u32 handle, const u8 *mac)
1399 {
1400         struct qed_hash_iscsi_con *hash_con;
1401
1402         hash_con = qed_iscsi_get_hash(cdev, handle);
1403         if (!hash_con) {
1404                 DP_NOTICE(cdev, "Failed to find connection for handle %d\n",
1405                           handle);
1406                 return -EINVAL;
1407         }
1408
1409         return qed_sp_iscsi_mac_update(QED_LEADING_HWFN(cdev),
1410                                        hash_con->con,
1411                                        QED_SPQ_MODE_EBLOCK, NULL);
1412 }
1413
1414 void qed_get_protocol_stats_iscsi(struct qed_dev *cdev,
1415                                   struct qed_mcp_iscsi_stats *stats)
1416 {
1417         struct qed_iscsi_stats proto_stats;
1418
1419         /* Retrieve FW statistics */
1420         memset(&proto_stats, 0, sizeof(proto_stats));
1421         if (qed_iscsi_stats(cdev, &proto_stats)) {
1422                 DP_VERBOSE(cdev, QED_MSG_STORAGE,
1423                            "Failed to collect ISCSI statistics\n");
1424                 return;
1425         }
1426
1427         /* Translate FW statistics into struct */
1428         stats->rx_pdus = proto_stats.iscsi_rx_total_pdu_cnt;
1429         stats->tx_pdus = proto_stats.iscsi_tx_total_pdu_cnt;
1430         stats->rx_bytes = proto_stats.iscsi_rx_bytes_cnt;
1431         stats->tx_bytes = proto_stats.iscsi_tx_bytes_cnt;
1432 }
1433
1434 static const struct qed_iscsi_ops qed_iscsi_ops_pass = {
1435         .common = &qed_common_ops_pass,
1436         .ll2 = &qed_ll2_ops_pass,
1437         .fill_dev_info = &qed_fill_iscsi_dev_info,
1438         .register_ops = &qed_register_iscsi_ops,
1439         .start = &qed_iscsi_start,
1440         .stop = &qed_iscsi_stop,
1441         .acquire_conn = &qed_iscsi_acquire_conn,
1442         .release_conn = &qed_iscsi_release_conn,
1443         .offload_conn = &qed_iscsi_offload_conn,
1444         .update_conn = &qed_iscsi_update_conn,
1445         .destroy_conn = &qed_iscsi_destroy_conn,
1446         .clear_sq = &qed_iscsi_clear_conn_sq,
1447         .get_stats = &qed_iscsi_stats,
1448         .change_mac = &qed_iscsi_change_mac,
1449 };
1450
1451 const struct qed_iscsi_ops *qed_get_iscsi_ops(void)
1452 {
1453         return &qed_iscsi_ops_pass;
1454 }
1455 EXPORT_SYMBOL(qed_get_iscsi_ops);
1456
1457 void qed_put_iscsi_ops(void)
1458 {
1459 }
1460 EXPORT_SYMBOL(qed_put_iscsi_ops);