1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * Copyright (c) 2018, Joyent, Inc.
29  */
30 
31 #include <sys/types.h>
32 #include <sys/time.h>
33 #include <sys/nvpair.h>
34 #include <sys/cmn_err.h>
35 #include <sys/cred.h>
36 #include <sys/open.h>
37 #include <sys/ddi.h>
38 #include <sys/sunddi.h>
39 #include <sys/conf.h>
40 #include <sys/modctl.h>
41 #include <sys/cyclic.h>
42 #include <sys/errorq.h>
43 #include <sys/stat.h>
44 #include <sys/cpuvar.h>
45 #include <sys/mc_intel.h>
46 #include <sys/mc.h>
47 #include <sys/fm/protocol.h>
48 #include "nhm_log.h"
49 #include "intel_nhm.h"
50 
51 int max_bus_number = 0xff;
52 
53 nvlist_t *inhm_mc_nvl[MAX_CPU_NODES];
54 krwlock_t inhm_mc_lock;
55 
56 char *inhm_mc_snapshot[MAX_CPU_NODES];
57 uint_t nhm_config_gen;
58 uint_t inhm_mc_snapshotgen;
59 size_t inhm_mc_snapshotsz[MAX_CPU_NODES];
60 static dev_info_t *inhm_dip;
61 int nhm_allow_detach = 0;
62 
63 extern int nhm_patrol_scrub;
64 extern int nhm_demand_scrub;
65 extern int nhm_no_smbios;
66 extern int nhm_smbios_serial;
67 extern int nhm_smbios_manufacturer;
68 extern int nhm_smbios_part_number;
69 extern int nhm_smbios_version;
70 extern int nhm_smbios_label;
71 
72 extern void inhm_create_nvl(int);
73 extern char *inhm_mc_name(void);
74 extern void init_dimms(void);
75 extern void nhm_smbios();
76 
77 static void
78 inhm_mc_snapshot_destroy()
79 {
80 	int i;
81 
82 	ASSERT(RW_LOCK_HELD(&inhm_mc_lock));
83 
84 	for (i = 0; i < MAX_CPU_NODES; i++) {
85 		if (inhm_mc_snapshot[i] == NULL)
86 			continue;
87 
88 		kmem_free(inhm_mc_snapshot[i], inhm_mc_snapshotsz[i]);
89 		inhm_mc_snapshot[i] = NULL;
90 		inhm_mc_snapshotsz[i] = 0;
91 	}
92 	inhm_mc_snapshotgen++;
93 }
94 
95 static int
96 inhm_mc_snapshot_update()
97 {
98 	int i;
99 	int rt = 0;
100 
101 	ASSERT(RW_LOCK_HELD(&inhm_mc_lock));
102 
103 	for (i = 0; i < MAX_CPU_NODES; i++) {
104 		if (inhm_mc_snapshot[i] != NULL)
105 			continue;
106 
107 		if (nvlist_pack(inhm_mc_nvl[i], &inhm_mc_snapshot[i],
108 		    &inhm_mc_snapshotsz[i], NV_ENCODE_XDR, KM_SLEEP) != 0)
109 			rt = -1;
110 	}
111 
112 	return (rt);
113 }
114 
115 /*ARGSUSED*/
116 static int
117 inhm_mc_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp,
118     int *rvalp)
119 {
120 	int rc = 0;
121 	int chip;
122 	mc_snapshot_info_t mcs;
123 
124 	if (cmd != MC_IOC_SNAPSHOT_INFO && cmd != MC_IOC_SNAPSHOT)
125 		return (EINVAL);
126 
127 	rw_enter(&inhm_mc_lock, RW_READER);
128 	chip = getminor(dev) % MAX_CPU_NODES;
129 	if (inhm_mc_nvl[chip] == NULL ||
130 	    inhm_mc_snapshotgen != nhm_config_gen) {
131 		if (!rw_tryupgrade(&inhm_mc_lock)) {
132 			rw_exit(&inhm_mc_lock);
133 			return (EAGAIN);
134 		}
135 		if (inhm_mc_nvl[chip])
136 			inhm_mc_snapshot_destroy();
137 		inhm_create_nvl(chip);
138 		nhm_config_gen = inhm_mc_snapshotgen;
139 		(void) inhm_mc_snapshot_update();
140 	}
141 	switch (cmd) {
142 	case MC_IOC_SNAPSHOT_INFO:
143 		mcs.mcs_size = (uint32_t)inhm_mc_snapshotsz[chip];
144 		mcs.mcs_gen = inhm_mc_snapshotgen;
145 
146 		if (ddi_copyout(&mcs, (void *)arg, sizeof (mc_snapshot_info_t),
147 		    mode) < 0)
148 			rc = EFAULT;
149 		break;
150 	case MC_IOC_SNAPSHOT:
151 		if (ddi_copyout(inhm_mc_snapshot[chip], (void *)arg,
152 		    inhm_mc_snapshotsz[chip], mode) < 0)
153 			rc = EFAULT;
154 		break;
155 	}
156 	rw_exit(&inhm_mc_lock);
157 	return (rc);
158 }
159 
160 /*ARGSUSED*/
161 static int
162 inhm_mc_getinfo(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg,
163     void **result)
164 {
165 	if ((infocmd != DDI_INFO_DEVT2DEVINFO &&
166 	    infocmd != DDI_INFO_DEVT2INSTANCE) || inhm_dip == NULL) {
167 		*result = NULL;
168 		return (DDI_FAILURE);
169 	}
170 	if (infocmd == DDI_INFO_DEVT2DEVINFO)
171 		*result = inhm_dip;
172 	else
173 		*result = (void *)(uintptr_t)ddi_get_instance(inhm_dip);
174 	return (0);
175 }
176 
177 static int
178 inhm_mc_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
179 {
180 	int i;
181 	char buf[64];
182 
183 	if (cmd == DDI_RESUME) {
184 		nhm_dev_reinit();
185 		nhm_scrubber_enable();
186 		nhm_smbios();
187 		return (DDI_SUCCESS);
188 	}
189 	if (cmd != DDI_ATTACH)
190 		return (DDI_FAILURE);
191 	if (inhm_dip == NULL) {
192 		inhm_dip = dip;
193 		nhm_pci_cfg_setup(dip);
194 		(void) ddi_prop_update_string(DDI_DEV_T_NONE, dip, "model",
195 		    inhm_mc_name());
196 		if (nhm_dev_init()) {
197 			nhm_pci_cfg_free();
198 			inhm_dip = NULL;
199 			return (DDI_FAILURE);
200 		}
201 		ddi_set_name_addr(dip, "1");
202 		for (i = 0; i < MAX_CPU_NODES; i++) {
203 			(void) snprintf(buf, sizeof (buf), "mc-intel-%d", i);
204 			if (ddi_create_minor_node(dip, buf, S_IFCHR,
205 			    i, "ddi_mem_ctrl", 0) != DDI_SUCCESS) {
206 				cmn_err(CE_WARN, "failed to create minor node"
207 				    " for memory controller %d\n", i);
208 			}
209 		}
210 		cmi_hdl_walk(inhm_mc_register, NULL, NULL, NULL);
211 		nhm_patrol_scrub = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
212 		    DDI_PROP_DONTPASS, "patrol-scrub", 0);
213 		nhm_demand_scrub = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
214 		    DDI_PROP_DONTPASS, "demand-scrub", 0);
215 		nhm_no_smbios = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
216 		    DDI_PROP_DONTPASS, "no-smbios", 0);
217 		nhm_smbios_serial = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
218 		    DDI_PROP_DONTPASS, "smbios-dimm-serial", 1);
219 		nhm_smbios_manufacturer = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
220 		    DDI_PROP_DONTPASS, "smbios-dimm-manufacturer", 1);
221 		nhm_smbios_part_number = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
222 		    DDI_PROP_DONTPASS, "smbios-dimm-part-number", 1);
223 		nhm_smbios_version = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
224 		    DDI_PROP_DONTPASS, "smbios-dimme-version", 1);
225 		nhm_smbios_label = ddi_prop_get_int(DDI_DEV_T_ANY, dip,
226 		    DDI_PROP_DONTPASS, "smbios-dimm-label", 1);
227 		nhm_scrubber_enable();
228 		nhm_smbios();
229 	}
230 
231 	return (DDI_SUCCESS);
232 }
233 
234 /*ARGSUSED*/
235 static int
236 inhm_mc_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
237 {
238 	if (nhm_allow_detach && cmd == DDI_DETACH && dip == inhm_dip) {
239 		rw_enter(&inhm_mc_lock, RW_WRITER);
240 		inhm_mc_snapshot_destroy();
241 		rw_exit(&inhm_mc_lock);
242 		inhm_dip = NULL;
243 		return (DDI_SUCCESS);
244 	} else if (cmd == DDI_SUSPEND || cmd == DDI_PM_SUSPEND) {
245 		return (DDI_SUCCESS);
246 	} else {
247 		return (DDI_FAILURE);
248 	}
249 }
250 
251 /*ARGSUSED*/
252 static int
253 inhm_mc_open(dev_t *devp, int flag, int otyp, cred_t *credp)
254 {
255 	if (otyp != OTYP_CHR)
256 		return (EINVAL);
257 
258 	rw_enter(&inhm_mc_lock, RW_READER);
259 	if (getminor(*devp) >= MAX_CPU_NODES) {
260 		rw_exit(&inhm_mc_lock);
261 		return (EINVAL);
262 	}
263 	rw_exit(&inhm_mc_lock);
264 
265 	return (0);
266 }
267 
268 /*ARGSUSED*/
269 static int
270 inhm_mc_close(dev_t dev, int flag, int otyp, cred_t *credp)
271 {
272 	return (0);
273 }
274 
275 
276 static struct cb_ops inhm_mc_cb_ops = {
277 	inhm_mc_open,
278 	inhm_mc_close,
279 	nodev,		/* not a block driver */
280 	nodev,		/* no print routine */
281 	nodev,		/* no dump routine */
282 	nodev,		/* no read routine */
283 	nodev,		/* no write routine */
284 	inhm_mc_ioctl,
285 	nodev,		/* no devmap routine */
286 	nodev,		/* no mmap routine */
287 	nodev,		/* no segmap routine */
288 	nochpoll,	/* no chpoll routine */
289 	ddi_prop_op,
290 	0,		/* not a STREAMS driver */
291 	D_NEW | D_MP,	/* safe for multi-thread/multi-processor */
292 };
293 
294 static struct dev_ops inhm_mc_ops = {
295 	DEVO_REV,		/* devo_rev */
296 	0,			/* devo_refcnt */
297 	inhm_mc_getinfo,		/* devo_getinfo */
298 	nulldev,		/* devo_identify */
299 	nulldev,		/* devo_probe */
300 	inhm_mc_attach,		/* devo_attach */
301 	inhm_mc_detach,		/* devo_detach */
302 	nodev,			/* devo_reset */
303 	&inhm_mc_cb_ops,		/* devo_cb_ops */
304 	NULL,			/* devo_bus_ops */
305 	NULL,			/* devo_power */
306 	ddi_quiesce_not_needed,	/* devo_quiesce */
307 };
308 
309 static struct modldrv modldrv = {
310 	&mod_driverops,
311 	"Intel QuickPath Memory Controller Hub Module",
312 	&inhm_mc_ops
313 };
314 
315 static struct modlinkage modlinkage = {
316 	MODREV_1,
317 	(void *)&modldrv,
318 	NULL
319 };
320 
321 int
322 _init(void)
323 {
324 	int err;
325 
326 	err = nhm_init();
327 	if (err == 0 && (err = mod_install(&modlinkage)) == 0) {
328 		rw_init(&inhm_mc_lock, NULL, RW_DRIVER, NULL);
329 		init_dimms();
330 	}
331 
332 	return (err);
333 }
334 
335 int
336 _info(struct modinfo *modinfop)
337 {
338 	return (mod_info(&modlinkage, modinfop));
339 }
340 
341 int
342 _fini(void)
343 {
344 	int err;
345 
346 	if ((err = mod_remove(&modlinkage)) == 0) {
347 		nhm_unload();
348 		rw_destroy(&inhm_mc_lock);
349 	}
350 
351 	return (err);
352 }
353