James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 1 | /* |
| 2 | * SCSI Transport Netlink Interface |
| 3 | * Used for the posting of outbound SCSI transport events |
| 4 | * |
| 5 | * Copyright (C) 2006 James Smart, Emulex Corporation |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | #ifndef SCSI_NETLINK_H |
| 23 | #define SCSI_NETLINK_H |
| 24 | |
James Smart | 22447be | 2008-08-08 02:14:18 -0400 | [diff] [blame^] | 25 | #include <linux/netlink.h> |
| 26 | |
| 27 | |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 28 | /* |
| 29 | * This file intended to be included by both kernel and user space |
| 30 | */ |
| 31 | |
| 32 | /* Single Netlink Message type to send all SCSI Transport messages */ |
| 33 | #define SCSI_TRANSPORT_MSG NLMSG_MIN_TYPE + 1 |
| 34 | |
| 35 | /* SCSI Transport Broadcast Groups */ |
| 36 | /* leaving groups 0 and 1 unassigned */ |
| 37 | #define SCSI_NL_GRP_FC_EVENTS (1<<2) /* Group 2 */ |
| 38 | #define SCSI_NL_GRP_CNT 3 |
| 39 | |
| 40 | |
| 41 | /* SCSI_TRANSPORT_MSG event message header */ |
| 42 | struct scsi_nl_hdr { |
| 43 | uint8_t version; |
| 44 | uint8_t transport; |
| 45 | uint16_t magic; |
| 46 | uint16_t msgtype; |
| 47 | uint16_t msglen; |
| 48 | } __attribute__((aligned(sizeof(uint64_t)))); |
| 49 | |
| 50 | /* scsi_nl_hdr->version value */ |
| 51 | #define SCSI_NL_VERSION 1 |
| 52 | |
| 53 | /* scsi_nl_hdr->magic value */ |
| 54 | #define SCSI_NL_MAGIC 0xA1B2 |
| 55 | |
| 56 | /* scsi_nl_hdr->transport value */ |
| 57 | #define SCSI_NL_TRANSPORT 0 |
| 58 | #define SCSI_NL_TRANSPORT_FC 1 |
| 59 | #define SCSI_NL_MAX_TRANSPORTS 2 |
| 60 | |
James Smart | 22447be | 2008-08-08 02:14:18 -0400 | [diff] [blame^] | 61 | /* Transport-based scsi_nl_hdr->msgtype values are defined in each transport */ |
| 62 | |
| 63 | /* |
| 64 | * GENERIC SCSI scsi_nl_hdr->msgtype Values |
| 65 | */ |
| 66 | /* kernel -> user */ |
| 67 | #define SCSI_NL_SHOST_VENDOR 0x0001 |
| 68 | /* user -> kernel */ |
| 69 | /* SCSI_NL_SHOST_VENDOR msgtype is kernel->user and user->kernel */ |
| 70 | |
| 71 | |
| 72 | /* |
| 73 | * Message Structures : |
| 74 | */ |
| 75 | |
| 76 | /* macro to round up message lengths to 8byte boundary */ |
| 77 | #define SCSI_NL_MSGALIGN(len) (((len) + 7) & ~7) |
| 78 | |
| 79 | |
| 80 | /* |
| 81 | * SCSI HOST Vendor Unique messages : |
| 82 | * SCSI_NL_SHOST_VENDOR |
| 83 | * |
| 84 | * Note: The Vendor Unique message payload will begin directly after |
| 85 | * this structure, with the length of the payload per vmsg_datalen. |
| 86 | * |
| 87 | * Note: When specifying vendor_id, be sure to read the Vendor Type and ID |
| 88 | * formatting requirements specified below |
| 89 | */ |
| 90 | struct scsi_nl_host_vendor_msg { |
| 91 | struct scsi_nl_hdr snlh; /* must be 1st element ! */ |
| 92 | uint64_t vendor_id; |
| 93 | uint16_t host_no; |
| 94 | uint16_t vmsg_datalen; |
| 95 | } __attribute__((aligned(sizeof(uint64_t)))); |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 96 | |
| 97 | |
| 98 | /* |
| 99 | * Vendor ID: |
| 100 | * If transports post vendor-unique events, they must pass a well-known |
| 101 | * 32-bit vendor identifier. This identifier consists of 8 bits indicating |
| 102 | * the "type" of identifier contained, and 24 bits of id data. |
| 103 | * |
| 104 | * Identifiers for each type: |
| 105 | * PCI : ID data is the 16 bit PCI Registered Vendor ID |
| 106 | */ |
James Smart | f14e2e2 | 2006-08-22 09:55:23 -0400 | [diff] [blame] | 107 | #define SCSI_NL_VID_TYPE_SHIFT 56 |
| 108 | #define SCSI_NL_VID_TYPE_MASK ((u64)0xFF << SCSI_NL_VID_TYPE_SHIFT) |
| 109 | #define SCSI_NL_VID_TYPE_PCI ((u64)0x01 << SCSI_NL_VID_TYPE_SHIFT) |
| 110 | #define SCSI_NL_VID_ID_MASK (~ SCSI_NL_VID_TYPE_MASK) |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 111 | |
| 112 | |
| 113 | #define INIT_SCSI_NL_HDR(hdr, t, mtype, mlen) \ |
| 114 | { \ |
| 115 | (hdr)->version = SCSI_NL_VERSION; \ |
| 116 | (hdr)->transport = t; \ |
| 117 | (hdr)->magic = SCSI_NL_MAGIC; \ |
| 118 | (hdr)->msgtype = mtype; \ |
| 119 | (hdr)->msglen = mlen; \ |
| 120 | } |
| 121 | |
| 122 | |
James Smart | 22447be | 2008-08-08 02:14:18 -0400 | [diff] [blame^] | 123 | #ifdef __KERNEL__ |
| 124 | |
| 125 | #include <scsi/scsi_host.h> |
| 126 | |
| 127 | /* Exported Kernel Interfaces */ |
| 128 | int scsi_nl_add_transport(u8 tport, |
| 129 | int (*msg_handler)(struct sk_buff *), |
| 130 | void (*event_handler)(struct notifier_block *, unsigned long, void *)); |
| 131 | void scsi_nl_remove_transport(u8 tport); |
| 132 | |
| 133 | int scsi_nl_add_driver(u64 vendor_id, struct scsi_host_template *hostt, |
| 134 | int (*nlmsg_handler)(struct Scsi_Host *shost, void *payload, |
| 135 | u32 len, u32 pid), |
| 136 | void (*nlevt_handler)(struct notifier_block *nb, |
| 137 | unsigned long event, void *notify_ptr)); |
| 138 | void scsi_nl_remove_driver(u64 vendor_id); |
| 139 | |
| 140 | void scsi_nl_send_transport_msg(u32 pid, struct scsi_nl_hdr *hdr); |
| 141 | int scsi_nl_send_vendor_msg(u32 pid, unsigned short host_no, u64 vendor_id, |
| 142 | char *data_buf, u32 data_len); |
| 143 | |
| 144 | #endif /* __KERNEL__ */ |
| 145 | |
James Smart | 84314fd | 2006-08-18 17:30:09 -0400 | [diff] [blame] | 146 | #endif /* SCSI_NETLINK_H */ |
| 147 | |