1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2017-2019 Broadcom. All Rights Reserved. The term *
5 * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. *
6 * Copyright (C) 2004-2016 Emulex. All rights reserved. *
7 * EMULEX and SLI are trademarks of Emulex. *
8 * www.broadcom.com *
9 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
10 * *
11 * This program is free software; you can redistribute it and/or *
12 * modify it under the terms of version 2 of the GNU General *
13 * Public License as published by the Free Software Foundation. *
14 * This program is distributed in the hope that it will be useful. *
15 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
16 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
17 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
18 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19 * TO BE LEGALLY INVALID. See the GNU General Public License for *
20 * more details, a copy of which can be found in the file COPYING *
21 * included with this package. *
22 ********************************************************************/
23
24 #define LPFC_NVMET_DEFAULT_SEGS (64 + 1) /* 256K IOs */
25 #define LPFC_NVMET_RQE_MIN_POST 128
26 #define LPFC_NVMET_RQE_DEF_POST 512
27 #define LPFC_NVMET_RQE_DEF_COUNT 2048
28 #define LPFC_NVMET_SUCCESS_LEN 12
29
30 #define LPFC_NVMET_MRQ_AUTO 0
31 #define LPFC_NVMET_MRQ_MAX 16
32
33 #define LPFC_NVMET_WAIT_TMO (5 * MSEC_PER_SEC)
34
35 /* Used for NVME Target */
36 struct lpfc_nvmet_tgtport {
37 struct lpfc_hba *phba;
38 struct completion *tport_unreg_cmp;
39
40 /* Stats counters - lpfc_nvmet_unsol_ls_buffer */
41 atomic_t rcv_ls_req_in;
42 atomic_t rcv_ls_req_out;
43 atomic_t rcv_ls_req_drop;
44 atomic_t xmt_ls_abort;
45 atomic_t xmt_ls_abort_cmpl;
46
47 /* Stats counters - lpfc_nvmet_xmt_ls_rsp */
48 atomic_t xmt_ls_rsp;
49 atomic_t xmt_ls_drop;
50
51 /* Stats counters - lpfc_nvmet_xmt_ls_rsp_cmp */
52 atomic_t xmt_ls_rsp_error;
53 atomic_t xmt_ls_rsp_aborted;
54 atomic_t xmt_ls_rsp_xb_set;
55 atomic_t xmt_ls_rsp_cmpl;
56
57 /* Stats counters - lpfc_nvmet_unsol_fcp_buffer */
58 atomic_t rcv_fcp_cmd_in;
59 atomic_t rcv_fcp_cmd_out;
60 atomic_t rcv_fcp_cmd_drop;
61 atomic_t rcv_fcp_cmd_defer;
62 atomic_t xmt_fcp_release;
63
64 /* Stats counters - lpfc_nvmet_xmt_fcp_op */
65 atomic_t xmt_fcp_drop;
66 atomic_t xmt_fcp_read_rsp;
67 atomic_t xmt_fcp_read;
68 atomic_t xmt_fcp_write;
69 atomic_t xmt_fcp_rsp;
70
71 /* Stats counters - lpfc_nvmet_xmt_fcp_op_cmp */
72 atomic_t xmt_fcp_rsp_xb_set;
73 atomic_t xmt_fcp_rsp_cmpl;
74 atomic_t xmt_fcp_rsp_error;
75 atomic_t xmt_fcp_rsp_aborted;
76 atomic_t xmt_fcp_rsp_drop;
77
78 /* Stats counters - lpfc_nvmet_xmt_fcp_abort */
79 atomic_t xmt_fcp_xri_abort_cqe;
80 atomic_t xmt_fcp_abort;
81 atomic_t xmt_fcp_abort_cmpl;
82 atomic_t xmt_abort_sol;
83 atomic_t xmt_abort_unsol;
84 atomic_t xmt_abort_rsp;
85 atomic_t xmt_abort_rsp_error;
86
87 /* Stats counters - defer IO */
88 atomic_t defer_ctx;
89 atomic_t defer_fod;
90 atomic_t defer_wqfull;
91 };
92
93 struct lpfc_nvmet_ctx_info {
94 struct list_head nvmet_ctx_list;
95 spinlock_t nvmet_ctx_list_lock; /* lock per CPU */
96 struct lpfc_nvmet_ctx_info *nvmet_ctx_next_cpu;
97 struct lpfc_nvmet_ctx_info *nvmet_ctx_start_cpu;
98 uint16_t nvmet_ctx_list_cnt;
99 char pad[16]; /* pad to a cache-line */
100 };
101
102 /* This retrieves the context info associated with the specified cpu / mrq */
103 #define lpfc_get_ctx_list(phba, cpu, mrq) \
104 (phba->sli4_hba.nvmet_ctx_info + ((cpu * phba->cfg_nvmet_mrq) + mrq))
105
106 struct lpfc_nvmet_rcv_ctx {
107 union {
108 struct nvmefc_tgt_ls_req ls_req;
109 struct nvmefc_tgt_fcp_req fcp_req;
110 } ctx;
111 struct list_head list;
112 struct lpfc_hba *phba;
113 struct lpfc_iocbq *wqeq;
114 struct lpfc_iocbq *abort_wqeq;
115 dma_addr_t txrdy_phys;
116 spinlock_t ctxlock; /* protect flag access */
117 uint32_t *txrdy;
118 uint32_t sid;
119 uint32_t offset;
120 uint16_t oxid;
121 uint16_t size;
122 uint16_t entry_cnt;
123 uint16_t cpu;
124 uint16_t idx;
125 uint16_t state;
126 /* States */
127 #define LPFC_NVMET_STE_LS_RCV 1
128 #define LPFC_NVMET_STE_LS_ABORT 2
129 #define LPFC_NVMET_STE_LS_RSP 3
130 #define LPFC_NVMET_STE_RCV 4
131 #define LPFC_NVMET_STE_DATA 5
132 #define LPFC_NVMET_STE_ABORT 6
133 #define LPFC_NVMET_STE_DONE 7
134 #define LPFC_NVMET_STE_FREE 0xff
135 uint16_t flag;
136 #define LPFC_NVMET_IO_INP 0x1 /* IO is in progress on exchange */
137 #define LPFC_NVMET_ABORT_OP 0x2 /* Abort WQE issued on exchange */
138 #define LPFC_NVMET_XBUSY 0x4 /* XB bit set on IO cmpl */
139 #define LPFC_NVMET_CTX_RLS 0x8 /* ctx free requested */
140 #define LPFC_NVMET_ABTS_RCV 0x10 /* ABTS received on exchange */
141 #define LPFC_NVMET_CTX_REUSE_WQ 0x20 /* ctx reused via WQ */
142 #define LPFC_NVMET_DEFER_WQFULL 0x40 /* Waiting on a free WQE */
143 #define LPFC_NVMET_TNOTIFY 0x80 /* notify transport of abts */
144 struct rqb_dmabuf *rqb_buffer;
145 struct lpfc_nvmet_ctxbuf *ctxbuf;
146 struct lpfc_sli4_hdw_queue *hdwq;
147
148 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
149 uint64_t ts_isr_cmd;
150 uint64_t ts_cmd_nvme;
151 uint64_t ts_nvme_data;
152 uint64_t ts_data_wqput;
153 uint64_t ts_isr_data;
154 uint64_t ts_data_nvme;
155 uint64_t ts_nvme_status;
156 uint64_t ts_status_wqput;
157 uint64_t ts_isr_status;
158 uint64_t ts_status_nvme;
159 #endif
160 };