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1 /*-
2  * Copyright (c) 2006 IronPort Systems Inc. <ambrisko@ironport.com>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD$
27  */
28
29 #ifndef __IPMIVARS_H__
30 #define __IPMIVARS_H__
31
32 struct ipmi_get_info {
33         int             iface_type;
34         uint64_t        address;
35         int             offset;
36         int             io_mode;
37         int             irq;
38 };
39
40 struct ipmi_device;
41
42 struct ipmi_request {
43         TAILQ_ENTRY(ipmi_request) ir_link;
44         struct ipmi_device *ir_owner;   /* Driver uses NULL. */
45         u_char          *ir_request;    /* Request is data to send to BMC. */
46         size_t          ir_requestlen;
47         u_char          *ir_reply;      /* Reply is data read from BMC. */
48         size_t          ir_replybuflen; /* Length of ir_reply[] buffer. */
49         int             ir_replylen;    /* Length of reply from BMC. */
50         int             ir_error;
51         long            ir_msgid;
52         uint8_t         ir_addr;
53         uint8_t         ir_command;
54         uint8_t         ir_compcode;
55 };
56
57 #define MAX_RES                         3
58 #define KCS_DATA                        0
59 #define KCS_CTL_STS                     1
60 #define SMIC_DATA                       0
61 #define SMIC_CTL_STS                    1
62 #define SMIC_FLAGS                      2
63
64 struct ipmi_softc;
65
66 /* Per file descriptor data. */
67 struct ipmi_device {
68         TAILQ_ENTRY(ipmi_device) ipmi_link;
69         TAILQ_HEAD(,ipmi_request) ipmi_completed_requests;
70         struct selinfo          ipmi_select;
71         struct ipmi_softc       *ipmi_softc;
72         int                     ipmi_closing;
73         int                     ipmi_requests;
74         u_char                  ipmi_address;   /* IPMB address. */
75         u_char                  ipmi_lun;
76 };
77
78 struct ipmi_kcs {
79 };
80
81 struct ipmi_smic {
82 };
83
84 struct ipmi_ssif {
85         device_t smbus;
86         int     smbus_address;
87 };
88
89 struct ipmi_softc {
90         device_t                ipmi_dev;
91         union {
92                 struct ipmi_kcs kcs;
93                 struct ipmi_smic smic;
94                 struct ipmi_ssif ssif;
95         } _iface;
96         int                     ipmi_io_rid;
97         int                     ipmi_io_type;
98         struct mtx              ipmi_io_lock;
99         struct resource         *ipmi_io_res[MAX_RES];
100         int                     ipmi_io_spacing;
101         int                     ipmi_irq_rid;
102         struct resource         *ipmi_irq_res;
103         void                    *ipmi_irq;
104         int                     ipmi_detaching;
105         int                     ipmi_opened;
106         struct cdev             *ipmi_cdev;
107         TAILQ_HEAD(,ipmi_request) ipmi_pending_requests;
108         int                     ipmi_driver_requests_polled;
109         eventhandler_tag        ipmi_watchdog_tag;
110         int                     ipmi_watchdog_active;
111         struct intr_config_hook ipmi_ich;
112         struct mtx              ipmi_requests_lock;
113         struct cv               ipmi_request_added;
114         struct proc             *ipmi_kthread;
115         driver_intr_t           *ipmi_intr;
116         int                     (*ipmi_startup)(struct ipmi_softc *);
117         int                     (*ipmi_enqueue_request)(struct ipmi_softc *, struct ipmi_request *);
118         int                     (*ipmi_driver_request)(struct ipmi_softc *, struct ipmi_request *, int);
119 };
120
121 #define ipmi_ssif_smbus_address         _iface.ssif.smbus_address
122 #define ipmi_ssif_smbus                 _iface.ssif.smbus
123
124 struct ipmi_ipmb {
125         u_char foo;
126 };
127
128 #define KCS_MODE                0x01
129 #define SMIC_MODE               0x02
130 #define BT_MODE                 0x03
131 #define SSIF_MODE               0x04
132
133 /* KCS status flags */
134 #define KCS_STATUS_OBF                  0x01 /* Data Out ready from BMC */
135 #define KCS_STATUS_IBF                  0x02 /* Data In from System */
136 #define KCS_STATUS_SMS_ATN              0x04 /* Ready in RX queue */
137 #define KCS_STATUS_C_D                  0x08 /* Command/Data register write*/
138 #define KCS_STATUS_OEM1                 0x10
139 #define KCS_STATUS_OEM2                 0x20
140 #define KCS_STATUS_S0                   0x40
141 #define KCS_STATUS_S1                   0x80
142  #define KCS_STATUS_STATE(x)            ((x)>>6)
143  #define KCS_STATUS_STATE_IDLE          0x0
144  #define KCS_STATUS_STATE_READ          0x1
145  #define KCS_STATUS_STATE_WRITE         0x2
146  #define KCS_STATUS_STATE_ERROR         0x3
147 #define KCS_IFACE_STATUS_OK             0x00
148 #define KCS_IFACE_STATUS_ABORT          0x01
149 #define KCS_IFACE_STATUS_ILLEGAL        0x02
150 #define KCS_IFACE_STATUS_LENGTH_ERR     0x06
151 #define KCS_IFACE_STATUS_UNKNOWN_ERR    0xff
152
153 /* KCS control codes */
154 #define KCS_CONTROL_GET_STATUS_ABORT    0x60
155 #define KCS_CONTROL_WRITE_START         0x61
156 #define KCS_CONTROL_WRITE_END           0x62
157 #define KCS_DATA_IN_READ                0x68
158
159 /* SMIC status flags */
160 #define SMIC_STATUS_BUSY                0x01 /* System set and BMC clears it */
161 #define SMIC_STATUS_SMS_ATN             0x04 /* BMC has a message */
162 #define SMIC_STATUS_EVT_ATN             0x08 /* Event has been RX */
163 #define SMIC_STATUS_SMI                 0x10 /* asserted SMI */
164 #define SMIC_STATUS_TX_RDY              0x40 /* Ready to accept WRITE */
165 #define SMIC_STATUS_RX_RDY              0x80 /* Ready to read */
166 #define SMIC_STATUS_RESERVED            0x22
167
168 /* SMIC control codes */
169 #define SMIC_CC_SMS_GET_STATUS          0x40
170 #define SMIC_CC_SMS_WR_START            0x41
171 #define SMIC_CC_SMS_WR_NEXT             0x42
172 #define SMIC_CC_SMS_WR_END              0x43
173 #define SMIC_CC_SMS_RD_START            0x44
174 #define SMIC_CC_SMS_RD_NEXT             0x45
175 #define SMIC_CC_SMS_RD_END              0x46
176
177 /* SMIC status codes */
178 #define SMIC_SC_SMS_RDY                 0xc0
179 #define SMIC_SC_SMS_WR_START            0xc1
180 #define SMIC_SC_SMS_WR_NEXT             0xc2
181 #define SMIC_SC_SMS_WR_END              0xc3
182 #define SMIC_SC_SMS_RD_START            0xc4
183 #define SMIC_SC_SMS_RD_NEXT             0xc5
184 #define SMIC_SC_SMS_RD_END              0xc6
185
186 #define IPMI_ADDR(netfn, lun)           ((netfn) << 2 | (lun))
187 #define IPMI_REPLY_ADDR(addr)           ((addr) + 0x4)
188
189 #define IPMI_LOCK(sc)           mtx_lock(&(sc)->ipmi_requests_lock)
190 #define IPMI_UNLOCK(sc)         mtx_unlock(&(sc)->ipmi_requests_lock)
191 #define IPMI_LOCK_ASSERT(sc)    mtx_assert(&(sc)->ipmi_requests_lock, MA_OWNED)
192
193 #define IPMI_IO_LOCK(sc)        mtx_lock(&(sc)->ipmi_io_lock)
194 #define IPMI_IO_UNLOCK(sc)      mtx_unlock(&(sc)->ipmi_io_lock)
195 #define IPMI_IO_LOCK_ASSERT(sc) mtx_assert(&(sc)->ipmi_io_lock, MA_OWNED)
196
197 #if __FreeBSD_version < 601105
198 #define bus_read_1(r, o) \
199         bus_space_read_1(rman_get_bustag(r), rman_get_bushandle(r), (o))
200 #define bus_write_1(r, o, v) \
201         bus_space_write_1(rman_get_bustag(r), rman_get_bushandle(r), (o), (v))
202 #endif
203
204 /* I/O to a single I/O resource. */
205 #define INB_SINGLE(sc, x)                                               \
206         bus_read_1((sc)->ipmi_io_res[0], (sc)->ipmi_io_spacing * (x))
207 #define OUTB_SINGLE(sc, x, value)                                       \
208         bus_write_1((sc)->ipmi_io_res[0], (sc)->ipmi_io_spacing * (x), value)
209
210 /* I/O with each register in its in I/O resource. */
211 #define INB_MULTIPLE(sc, x)                     \
212         bus_read_1((sc)->ipmi_io_res[(x)], 0)
213 #define OUTB_MULTIPLE(sc, x, value)                                     \
214         bus_write_1((sc)->ipmi_io_res[(x)], 0, value)
215
216 /*
217  * Determine I/O method based on whether or not we have more than one I/O
218  * resource.
219  */
220 #define INB(sc, x)                                                      \
221         ((sc)->ipmi_io_res[1] != NULL ? INB_MULTIPLE(sc, x) : INB_SINGLE(sc, x))
222 #define OUTB(sc, x, value)                                              \
223         ((sc)->ipmi_io_res[1] != NULL ? OUTB_MULTIPLE(sc, x, value) :   \
224             OUTB_SINGLE(sc, x, value))
225
226 #define MAX_TIMEOUT 6 * hz
227
228 int     ipmi_attach(device_t);
229 int     ipmi_detach(device_t);
230 void    ipmi_release_resources(device_t);
231
232 /* Manage requests. */
233 struct ipmi_request *ipmi_alloc_request(struct ipmi_device *, long, uint8_t,
234             uint8_t, size_t, size_t);
235 void    ipmi_complete_request(struct ipmi_softc *, struct ipmi_request *);
236 struct ipmi_request *ipmi_dequeue_request(struct ipmi_softc *);
237 void    ipmi_free_request(struct ipmi_request *);
238 int     ipmi_polled_enqueue_request(struct ipmi_softc *, struct ipmi_request *);
239 int     ipmi_submit_driver_request(struct ipmi_softc *, struct ipmi_request *,
240             int);
241
242 /* Identify BMC interface via SMBIOS. */
243 int     ipmi_smbios_identify(struct ipmi_get_info *);
244
245 /* Match BMC PCI device listed in SMBIOS. */
246 const char *ipmi_pci_match(uint16_t, uint16_t);
247
248 /* Interface attach routines. */
249 int     ipmi_kcs_attach(struct ipmi_softc *);
250 int     ipmi_kcs_probe_align(struct ipmi_softc *);
251 int     ipmi_smic_attach(struct ipmi_softc *);
252 int     ipmi_ssif_attach(struct ipmi_softc *, device_t, int);
253
254 #ifdef IPMB
255 int     ipmi_handle_attn(struct ipmi_softc *);
256 #endif
257
258 extern devclass_t ipmi_devclass;
259 extern int ipmi_attached;
260
261 #endif  /* !__IPMIVARS_H__ */