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 MIN_NVME_HW_QUEUES 1
17 #define DEF_NVME_HW_QUEUES 8
18 
19 #define NVME_ATIO_CMD_OFF 32
20 #define NVME_FIRST_PACKET_CMDLEN (64 - NVME_ATIO_CMD_OFF)
21 #define Q2T_NVME_NUM_TAGS 2048
22 #define QLA_MAX_FC_SEGMENTS 64
23 
24 struct scsi_qla_host;
25 struct qla_hw_data;
26 struct req_que;
27 struct srb;
28 
29 struct nvme_private {
30 	struct srb	*sp;
31 	struct nvmefc_ls_req *fd;
32 	struct work_struct ls_work;
33 	struct work_struct abort_work;
34 	int comp_status;
35 	spinlock_t cmd_lock;
36 };
37 
38 struct qla_nvme_rport {
39 	struct fc_port *fcport;
40 };
41 
42 #define COMMAND_NVME    0x88            /* Command Type FC-NVMe IOCB */
43 struct cmd_nvme {
44 	uint8_t entry_type;             /* Entry type. */
45 	uint8_t entry_count;            /* Entry count. */
46 	uint8_t sys_define;             /* System defined. */
47 	uint8_t entry_status;           /* Entry Status. */
48 
49 	uint32_t handle;                /* System handle. */
50 	__le16	nport_handle;		/* N_PORT handle. */
51 	__le16	timeout;		/* Command timeout. */
52 
53 	__le16	dseg_count;		/* Data segment count. */
54 	__le16	nvme_rsp_dsd_len;	/* NVMe RSP DSD length */
55 
56 	uint64_t rsvd;
57 
58 	__le16	control_flags;		/* Control Flags */
59 #define CF_ADMIN_ASYNC_EVENT		BIT_13
60 #define CF_NVME_FIRST_BURST_ENABLE	BIT_11
61 #define CF_DIF_SEG_DESCR_ENABLE         BIT_3
62 #define CF_DATA_SEG_DESCR_ENABLE        BIT_2
63 #define CF_READ_DATA                    BIT_1
64 #define CF_WRITE_DATA                   BIT_0
65 
66 	__le16	nvme_cmnd_dseg_len;             /* Data segment length. */
67 	__le64	 nvme_cmnd_dseg_address __packed;/* Data segment address. */
68 	__le64	 nvme_rsp_dseg_address __packed; /* Data segment address. */
69 
70 	__le32	byte_count;		/* Total byte count. */
71 
72 	uint8_t port_id[3];             /* PortID of destination port. */
73 	uint8_t vp_index;
74 
75 	struct dsd64 nvme_dsd;
76 };
77 
78 #define PT_LS4_REQUEST 0x89	/* Link Service pass-through IOCB (request) */
79 struct pt_ls4_request {
80 	uint8_t entry_type;
81 	uint8_t entry_count;
82 	uint8_t sys_define;
83 	uint8_t entry_status;
84 	uint32_t handle;
85 	__le16	status;
86 	__le16	nport_handle;
87 	__le16	tx_dseg_count;
88 	uint8_t  vp_index;
89 	uint8_t  rsvd;
90 	__le16	timeout;
91 	__le16	control_flags;
92 #define CF_LS4_SHIFT		13
93 #define CF_LS4_ORIGINATOR	0
94 #define CF_LS4_RESPONDER	1
95 #define CF_LS4_RESPONDER_TERM	2
96 
97 	__le16	rx_dseg_count;
98 	__le16	rsvd2;
99 	__le32	exchange_address;
100 	__le32	rsvd3;
101 	__le32	rx_byte_count;
102 	__le32	tx_byte_count;
103 	struct dsd64 dsd[2];
104 };
105 
106 #define PT_LS4_UNSOL 0x56	/* pass-up unsolicited rec FC-NVMe request */
107 struct pt_ls4_rx_unsol {
108 	uint8_t entry_type;
109 	uint8_t entry_count;
110 	__le16	rsvd0;
111 	__le16	rsvd1;
112 	uint8_t vp_index;
113 	uint8_t rsvd2;
114 	__le16	rsvd3;
115 	__le16	nport_handle;
116 	__le16	frame_size;
117 	__le16	rsvd4;
118 	__le32	exchange_address;
119 	uint8_t d_id[3];
120 	uint8_t r_ctl;
121 	be_id_t s_id;
122 	uint8_t cs_ctl;
123 	uint8_t f_ctl[3];
124 	uint8_t type;
125 	__le16	seq_cnt;
126 	uint8_t df_ctl;
127 	uint8_t seq_id;
128 	__le16	rx_id;
129 	__le16	ox_id;
130 	__le32	param;
131 	__le32	desc0;
132 #define PT_LS4_PAYLOAD_OFFSET 0x2c
133 #define PT_LS4_FIRST_PACKET_LEN 20
134 	__le32	desc_len;
135 	__le32	payload[3];
136 };
137 
138 /*
139  * Global functions prototype in qla_nvme.c source file.
140  */
141 int qla_nvme_register_hba(struct scsi_qla_host *);
142 int  qla_nvme_register_remote(struct scsi_qla_host *, struct fc_port *);
143 void qla_nvme_delete(struct scsi_qla_host *);
144 void qla24xx_nvme_ls4_iocb(struct scsi_qla_host *, struct pt_ls4_request *,
145     struct req_que *);
146 void qla24xx_async_gffid_sp_done(struct srb *sp, int);
147 #endif
148