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10#ifndef ZFCP_FC_H
11#define ZFCP_FC_H
12
13#include <scsi/fc/fc_els.h>
14#include <scsi/fc/fc_fcp.h>
15#include <scsi/fc/fc_ns.h>
16#include <scsi/scsi_cmnd.h>
17#include <scsi/scsi_tcq.h>
18#include "zfcp_fsf.h"
19
20#define ZFCP_FC_CT_SIZE_PAGE (PAGE_SIZE - sizeof(struct fc_ct_hdr))
21#define ZFCP_FC_GPN_FT_ENT_PAGE (ZFCP_FC_CT_SIZE_PAGE \
22 / sizeof(struct fc_gpn_ft_resp))
23#define ZFCP_FC_GPN_FT_NUM_BUFS 4
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25#define ZFCP_FC_GPN_FT_MAX_SIZE (ZFCP_FC_GPN_FT_NUM_BUFS * PAGE_SIZE \
26 - sizeof(struct fc_ct_hdr))
27#define ZFCP_FC_GPN_FT_MAX_ENT (ZFCP_FC_GPN_FT_NUM_BUFS * \
28 (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
29
30#define ZFCP_FC_CTELS_TMO (2 * FC_DEF_R_A_TOV / 1000)
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38struct zfcp_fc_event {
39 enum fc_host_event_code code;
40 u32 data;
41 struct list_head list;
42};
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50struct zfcp_fc_events {
51 struct list_head list;
52 spinlock_t list_lock;
53 struct work_struct work;
54};
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61struct zfcp_fc_gid_pn_req {
62 struct fc_ct_hdr ct_hdr;
63 struct fc_ns_gid_pn gid_pn;
64} __packed;
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71struct zfcp_fc_gid_pn_rsp {
72 struct fc_ct_hdr ct_hdr;
73 struct fc_gid_pn_resp gid_pn;
74} __packed;
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81struct zfcp_fc_gpn_ft_req {
82 struct fc_ct_hdr ct_hdr;
83 struct fc_ns_gid_ft gpn_ft;
84} __packed;
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91struct zfcp_fc_gspn_req {
92 struct fc_ct_hdr ct_hdr;
93 struct fc_gid_pn_resp gspn;
94} __packed;
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102struct zfcp_fc_gspn_rsp {
103 struct fc_ct_hdr ct_hdr;
104 struct fc_gspn_resp gspn;
105 char name[FC_SYMBOLIC_NAME_SIZE];
106} __packed;
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114struct zfcp_fc_rspn_req {
115 struct fc_ct_hdr ct_hdr;
116 struct fc_ns_rspn rspn;
117 char name[FC_SYMBOLIC_NAME_SIZE];
118} __packed;
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127struct zfcp_fc_req {
128 struct zfcp_fsf_ct_els ct_els;
129 struct scatterlist sg_req;
130 struct scatterlist sg_rsp;
131 union {
132 struct {
133 struct fc_els_adisc req;
134 struct fc_els_adisc rsp;
135 } adisc;
136 struct {
137 struct zfcp_fc_gid_pn_req req;
138 struct zfcp_fc_gid_pn_rsp rsp;
139 } gid_pn;
140 struct {
141 struct scatterlist sg_rsp2[ZFCP_FC_GPN_FT_NUM_BUFS - 1];
142 struct zfcp_fc_gpn_ft_req req;
143 } gpn_ft;
144 struct {
145 struct zfcp_fc_gspn_req req;
146 struct zfcp_fc_gspn_rsp rsp;
147 } gspn;
148 struct {
149 struct zfcp_fc_rspn_req req;
150 struct fc_ct_hdr rsp;
151 } rspn;
152 } u;
153};
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162enum zfcp_fc_wka_status {
163 ZFCP_FC_WKA_PORT_OFFLINE,
164 ZFCP_FC_WKA_PORT_CLOSING,
165 ZFCP_FC_WKA_PORT_OPENING,
166 ZFCP_FC_WKA_PORT_ONLINE,
167};
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180struct zfcp_fc_wka_port {
181 struct zfcp_adapter *adapter;
182 wait_queue_head_t completion_wq;
183 enum zfcp_fc_wka_status status;
184 atomic_t refcount;
185 u32 d_id;
186 u32 handle;
187 struct mutex mutex;
188 struct delayed_work work;
189};
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198struct zfcp_fc_wka_ports {
199 struct zfcp_fc_wka_port ms;
200 struct zfcp_fc_wka_port ts;
201 struct zfcp_fc_wka_port ds;
202 struct zfcp_fc_wka_port as;
203};
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211static inline
212void zfcp_fc_scsi_to_fcp(struct fcp_cmnd *fcp, struct scsi_cmnd *scsi,
213 u8 tm_flags)
214{
215 int_to_scsilun(scsi->device->lun, (struct scsi_lun *) &fcp->fc_lun);
216
217 if (unlikely(tm_flags)) {
218 fcp->fc_tm_flags = tm_flags;
219 return;
220 }
221
222 fcp->fc_pri_ta = FCP_PTA_SIMPLE;
223
224 if (scsi->sc_data_direction == DMA_FROM_DEVICE)
225 fcp->fc_flags |= FCP_CFL_RDDATA;
226 if (scsi->sc_data_direction == DMA_TO_DEVICE)
227 fcp->fc_flags |= FCP_CFL_WRDATA;
228
229 memcpy(fcp->fc_cdb, scsi->cmnd, scsi->cmd_len);
230
231 fcp->fc_dl = scsi_bufflen(scsi);
232
233 if (scsi_get_prot_type(scsi) == SCSI_PROT_DIF_TYPE1)
234 fcp->fc_dl += fcp->fc_dl / scsi->device->sector_size * 8;
235}
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241
242static inline
243void zfcp_fc_eval_fcp_rsp(struct fcp_resp_with_ext *fcp_rsp,
244 struct scsi_cmnd *scsi)
245{
246 struct fcp_resp_rsp_info *rsp_info;
247 char *sense;
248 u32 sense_len, resid;
249 u8 rsp_flags;
250
251 set_msg_byte(scsi, COMMAND_COMPLETE);
252 scsi->result |= fcp_rsp->resp.fr_status;
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254 rsp_flags = fcp_rsp->resp.fr_flags;
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256 if (unlikely(rsp_flags & FCP_RSP_LEN_VAL)) {
257 rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
258 if (rsp_info->rsp_code == FCP_TMF_CMPL)
259 set_host_byte(scsi, DID_OK);
260 else {
261 set_host_byte(scsi, DID_ERROR);
262 return;
263 }
264 }
265
266 if (unlikely(rsp_flags & FCP_SNS_LEN_VAL)) {
267 sense = (char *) &fcp_rsp[1];
268 if (rsp_flags & FCP_RSP_LEN_VAL)
269 sense += fcp_rsp->ext.fr_rsp_len;
270 sense_len = min(fcp_rsp->ext.fr_sns_len,
271 (u32) SCSI_SENSE_BUFFERSIZE);
272 memcpy(scsi->sense_buffer, sense, sense_len);
273 }
274
275 if (unlikely(rsp_flags & FCP_RESID_UNDER)) {
276 resid = fcp_rsp->ext.fr_resid;
277 scsi_set_resid(scsi, resid);
278 if (scsi_bufflen(scsi) - resid < scsi->underflow &&
279 !(rsp_flags & FCP_SNS_LEN_VAL) &&
280 fcp_rsp->resp.fr_status == SAM_STAT_GOOD)
281 set_host_byte(scsi, DID_ERROR);
282 }
283}
284
285#endif
286