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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * QLogic Fibre Channel HBA Driver
4  * Copyright (c)  2003-2017 QLogic Corporation
5  */
6 #ifndef __QLA_NVME_H
7 #define __QLA_NVME_H
8 
9 #include <uapi/scsi/fc/fc_fs.h>
10 #include <uapi/scsi/fc/fc_els.h>
11 #include <linux/nvme-fc-driver.h>
12 
13 #include "qla_def.h"
14 #include "qla_dsd.h"
15 
16 #define NVME_ATIO_CMD_OFF 32
17 #define NVME_FIRST_PACKET_CMDLEN (64 - NVME_ATIO_CMD_OFF)
18 #define Q2T_NVME_NUM_TAGS 2048
19 #define QLA_MAX_FC_SEGMENTS 64
20 
21 struct scsi_qla_host;
22 struct qla_hw_data;
23 struct req_que;
24 struct srb;
25 
26 struct nvme_private {
27 	struct srb	*sp;
28 	struct nvmefc_ls_req *fd;
29 	struct work_struct ls_work;
30 	struct work_struct abort_work;
31 	int comp_status;
32 	spinlock_t cmd_lock;
33 };
34 
35 struct qla_nvme_rport {
36 	struct fc_port *fcport;
37 };
38 
39 #define COMMAND_NVME    0x88            /* Command Type FC-NVMe IOCB */
40 struct cmd_nvme {
41 	uint8_t entry_type;             /* Entry type. */
42 	uint8_t entry_count;            /* Entry count. */
43 	uint8_t sys_define;             /* System defined. */
44 	uint8_t entry_status;           /* Entry Status. */
45 
46 	uint32_t handle;                /* System handle. */
47 	__le16	nport_handle;		/* N_PORT handle. */
48 	__le16	timeout;		/* Command timeout. */
49 
50 	__le16	dseg_count;		/* Data segment count. */
51 	__le16	nvme_rsp_dsd_len;	/* NVMe RSP DSD length */
52 
53 	uint64_t rsvd;
54 
55 	__le16	control_flags;		/* Control Flags */
56 #define CF_ADMIN_ASYNC_EVENT		BIT_13
57 #define CF_NVME_FIRST_BURST_ENABLE	BIT_11
58 #define CF_DIF_SEG_DESCR_ENABLE         BIT_3
59 #define CF_DATA_SEG_DESCR_ENABLE        BIT_2
60 #define CF_READ_DATA                    BIT_1
61 #define CF_WRITE_DATA                   BIT_0
62 
63 	__le16	nvme_cmnd_dseg_len;             /* Data segment length. */
64 	__le64	 nvme_cmnd_dseg_address __packed;/* Data segment address. */
65 	__le64	 nvme_rsp_dseg_address __packed; /* Data segment address. */
66 
67 	__le32	byte_count;		/* Total byte count. */
68 
69 	uint8_t port_id[3];             /* PortID of destination port. */
70 	uint8_t vp_index;
71 
72 	struct dsd64 nvme_dsd;
73 };
74 
75 #define PT_LS4_REQUEST 0x89	/* Link Service pass-through IOCB (request) */
76 struct pt_ls4_request {
77 	uint8_t entry_type;
78 	uint8_t entry_count;
79 	uint8_t sys_define;
80 	uint8_t entry_status;
81 	uint32_t handle;
82 	__le16	status;
83 	__le16	nport_handle;
84 	__le16	tx_dseg_count;
85 	uint8_t  vp_index;
86 	uint8_t  rsvd;
87 	__le16	timeout;
88 	__le16	control_flags;
89 #define CF_LS4_SHIFT		13
90 #define CF_LS4_ORIGINATOR	0
91 #define CF_LS4_RESPONDER	1
92 #define CF_LS4_RESPONDER_TERM	2
93 
94 	__le16	rx_dseg_count;
95 	__le16	rsvd2;
96 	__le32	exchange_address;
97 	__le32	rsvd3;
98 	__le32	rx_byte_count;
99 	__le32	tx_byte_count;
100 	struct dsd64 dsd[2];
101 };
102 
103 #define PT_LS4_UNSOL 0x56	/* pass-up unsolicited rec FC-NVMe request */
104 struct pt_ls4_rx_unsol {
105 	uint8_t entry_type;
106 	uint8_t entry_count;
107 	__le16	rsvd0;
108 	__le16	rsvd1;
109 	uint8_t vp_index;
110 	uint8_t rsvd2;
111 	__le16	rsvd3;
112 	__le16	nport_handle;
113 	__le16	frame_size;
114 	__le16	rsvd4;
115 	__le32	exchange_address;
116 	uint8_t d_id[3];
117 	uint8_t r_ctl;
118 	be_id_t s_id;
119 	uint8_t cs_ctl;
120 	uint8_t f_ctl[3];
121 	uint8_t type;
122 	__le16	seq_cnt;
123 	uint8_t df_ctl;
124 	uint8_t seq_id;
125 	__le16	rx_id;
126 	__le16	ox_id;
127 	__le32	param;
128 	__le32	desc0;
129 #define PT_LS4_PAYLOAD_OFFSET 0x2c
130 #define PT_LS4_FIRST_PACKET_LEN 20
131 	__le32	desc_len;
132 	__le32	payload[3];
133 };
134 
135 /*
136  * Global functions prototype in qla_nvme.c source file.
137  */
138 int qla_nvme_register_hba(struct scsi_qla_host *);
139 int  qla_nvme_register_remote(struct scsi_qla_host *, struct fc_port *);
140 void qla_nvme_delete(struct scsi_qla_host *);
141 void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *, struct pt_ls4_request *,
142     struct req_que *);
143 void qla24xx_async_gffid_sp_done(struct srb *sp, int);
144 #endif
145