tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2015 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * *
8 * This program is free software; you can redistribute it and/or *
9 * modify it under the terms of version 2 of the GNU General *
10 * Public License as published by the Free Software Foundation. *
11 * This program is distributed in the hope that it will be useful. *
12 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
13 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
14 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
15 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
16 * TO BE LEGALLY INVALID. See the GNU General Public License for *
17 * more details, a copy of which can be found in the file COPYING *
18 * included with this package. *
19 *******************************************************************/
20
21#include <asm/byteorder.h>
22
23struct lpfc_hba;
24#define LPFC_FCP_CDB_LEN 16
25
26#define list_remove_head(list, entry, type, member) \
27 do { \
28 entry = NULL; \
29 if (!list_empty(list)) { \
30 entry = list_entry((list)->next, type, member); \
31 list_del_init(&entry->member); \
32 } \
33 } while(0)
34
35#define list_get_first(list, type, member) \
36 (list_empty(list)) ? NULL : \
37 list_entry((list)->next, type, member)
38
39/* per-port data that is allocated in the FC transport for us */
40struct lpfc_rport_data {
41 struct lpfc_nodelist *pnode; /* Pointer to the node structure. */
42};
43
44struct lpfc_device_id {
45 struct lpfc_name vport_wwpn;
46 struct lpfc_name target_wwpn;
47 uint64_t lun;
48};
49
50struct lpfc_device_data {
51 struct list_head listentry;
52 struct lpfc_rport_data *rport_data;
53 struct lpfc_device_id device_id;
54 bool oas_enabled;
55 bool available;
56};
57
58struct fcp_rsp {
59 uint32_t rspRsvd1; /* FC Word 0, byte 0:3 */
60 uint32_t rspRsvd2; /* FC Word 1, byte 0:3 */
61
62 uint8_t rspStatus0; /* FCP_STATUS byte 0 (reserved) */
63 uint8_t rspStatus1; /* FCP_STATUS byte 1 (reserved) */
64 uint8_t rspStatus2; /* FCP_STATUS byte 2 field validity */
65#define RSP_LEN_VALID 0x01 /* bit 0 */
66#define SNS_LEN_VALID 0x02 /* bit 1 */
67#define RESID_OVER 0x04 /* bit 2 */
68#define RESID_UNDER 0x08 /* bit 3 */
69 uint8_t rspStatus3; /* FCP_STATUS byte 3 SCSI status byte */
70
71 uint32_t rspResId; /* Residual xfer if residual count field set in
72 fcpStatus2 */
73 /* Received in Big Endian format */
74 uint32_t rspSnsLen; /* Length of sense data in fcpSnsInfo */
75 /* Received in Big Endian format */
76 uint32_t rspRspLen; /* Length of FCP response data in fcpRspInfo */
77 /* Received in Big Endian format */
78
79 uint8_t rspInfo0; /* FCP_RSP_INFO byte 0 (reserved) */
80 uint8_t rspInfo1; /* FCP_RSP_INFO byte 1 (reserved) */
81 uint8_t rspInfo2; /* FCP_RSP_INFO byte 2 (reserved) */
82 uint8_t rspInfo3; /* FCP_RSP_INFO RSP_CODE byte 3 */
83
84#define RSP_NO_FAILURE 0x00
85#define RSP_DATA_BURST_ERR 0x01
86#define RSP_CMD_FIELD_ERR 0x02
87#define RSP_RO_MISMATCH_ERR 0x03
88#define RSP_TM_NOT_SUPPORTED 0x04 /* Task mgmt function not supported */
89#define RSP_TM_NOT_COMPLETED 0x05 /* Task mgmt function not performed */
90#define RSP_TM_INVALID_LU 0x09 /* Task mgmt function to invalid LU */
91
92 uint32_t rspInfoRsvd; /* FCP_RSP_INFO bytes 4-7 (reserved) */
93
94 uint8_t rspSnsInfo[128];
95#define SNS_ILLEGAL_REQ 0x05 /* sense key is byte 3 ([2]) */
96#define SNSCOD_BADCMD 0x20 /* sense code is byte 13 ([12]) */
97};
98
99struct fcp_cmnd {
100 struct scsi_lun fcp_lun;
101
102 uint8_t fcpCntl0; /* FCP_CNTL byte 0 (reserved) */
103 uint8_t fcpCntl1; /* FCP_CNTL byte 1 task codes */
104#define SIMPLE_Q 0x00
105#define HEAD_OF_Q 0x01
106#define ORDERED_Q 0x02
107#define ACA_Q 0x04
108#define UNTAGGED 0x05
109 uint8_t fcpCntl2; /* FCP_CTL byte 2 task management codes */
110#define FCP_ABORT_TASK_SET 0x02 /* Bit 1 */
111#define FCP_CLEAR_TASK_SET 0x04 /* bit 2 */
112#define FCP_BUS_RESET 0x08 /* bit 3 */
113#define FCP_LUN_RESET 0x10 /* bit 4 */
114#define FCP_TARGET_RESET 0x20 /* bit 5 */
115#define FCP_CLEAR_ACA 0x40 /* bit 6 */
116#define FCP_TERMINATE_TASK 0x80 /* bit 7 */
117 uint8_t fcpCntl3;
118#define WRITE_DATA 0x01 /* Bit 0 */
119#define READ_DATA 0x02 /* Bit 1 */
120
121 uint8_t fcpCdb[LPFC_FCP_CDB_LEN]; /* SRB cdb field is copied here */
122 uint32_t fcpDl; /* Total transfer length */
123
124};
125
126struct lpfc_scsicmd_bkt {
127 uint32_t cmd_count;
128};
129
130struct lpfc_scsi_buf {
131 struct list_head list;
132 struct scsi_cmnd *pCmd;
133 struct lpfc_rport_data *rdata;
134
135 uint32_t timeout;
136
137 uint16_t exch_busy; /* SLI4 hba reported XB on complete WCQE */
138 uint16_t status; /* From IOCB Word 7- ulpStatus */
139 uint32_t result; /* From IOCB Word 4. */
140
141 uint32_t seg_cnt; /* Number of scatter-gather segments returned by
142 * dma_map_sg. The driver needs this for calls
143 * to dma_unmap_sg. */
144 uint32_t prot_seg_cnt; /* seg_cnt's counterpart for protection data */
145
146 dma_addr_t nonsg_phys; /* Non scatter-gather physical address. */
147
148 /*
149 * data and dma_handle are the kernel virtual and bus address of the
150 * dma-able buffer containing the fcp_cmd, fcp_rsp and a scatter
151 * gather bde list that supports the sg_tablesize value.
152 */
153 void *data;
154 dma_addr_t dma_handle;
155
156 struct fcp_cmnd *fcp_cmnd;
157 struct fcp_rsp *fcp_rsp;
158 struct ulp_bde64 *fcp_bpl;
159
160 dma_addr_t dma_phys_bpl;
161
162 /* cur_iocbq has phys of the dma-able buffer.
163 * Iotag is in here
164 */
165 struct lpfc_iocbq cur_iocbq;
166 wait_queue_head_t *waitq;
167 unsigned long start_time;
168
169#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
170 /* Used to restore any changes to protection data for error injection */
171 void *prot_data_segment;
172 uint32_t prot_data;
173 uint32_t prot_data_type;
174#define LPFC_INJERR_REFTAG 1
175#define LPFC_INJERR_APPTAG 2
176#define LPFC_INJERR_GUARD 3
177#endif
178};
179
180#define LPFC_SCSI_DMA_EXT_SIZE 264
181#define LPFC_BPL_SIZE 1024
182#define MDAC_DIRECT_CMD 0x22
183
184#define FIND_FIRST_OAS_LUN 0
185#define NO_MORE_OAS_LUN -1
186#define NOT_OAS_ENABLED_LUN NO_MORE_OAS_LUN
187
188int lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba,
189 struct lpfc_scsi_buf *lpfc_cmd);