forked from ~ljy/RK356X_SDK_RELEASE
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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4 
 kernel/drivers/char/ipmi/ipmi_si_intf.c
....@@ -19,6 +19,8 @@
1919  * and drives the real SMI state machine.
2020  */
2121 
22
+#define pr_fmt(fmt) "ipmi_si: " fmt
23
+
2224 #include <linux/module.h>
2325 #include <linux/moduleparam.h>
2426 #include <linux/sched.h>
....@@ -38,10 +40,9 @@
3840 #include <linux/ipmi.h>
3941 #include <linux/ipmi_smi.h>
4042 #include "ipmi_si.h"
43
+#include "ipmi_si_sm.h"
4144 #include <linux/string.h>
4245 #include <linux/ctype.h>
43
-
44
-#define PFX "ipmi_si: "
4546 
4647 /* Measure times between events in the driver. */
4748 #undef DEBUG_TIMING
....@@ -71,7 +72,7 @@
7172 
7273 static const char * const si_to_str[] = { "invalid", "kcs", "smic", "bt" };
7374 
74
-static int initialized;
75
+static bool initialized;
7576 
7677 /*
7778  * Indexes into stats[] in smi_info below.
....@@ -232,14 +233,8 @@
232233 	/* From the get device id response... */
233234 	struct ipmi_device_id device_id;
234235 
235
-	/* Default driver model device. */
236
-	struct platform_device *pdev;
237
-
238236 	/* Have we added the device group to the device? */
239237 	bool dev_group_added;
240
-
241
-	/* Have we added the platform device? */
242
-	bool pdev_registered;
243238 
244239 	/* Counters and things for the proc filesystem. */
245240 	atomic_t stats[SI_NUM_STATS];
....@@ -272,8 +267,8 @@
272267 {
273268 	struct timespec64 t;
274269 
275
-	getnstimeofday64(&t);
276
-	pr_debug("**%s: %lld.%9.9ld\n", msg, (long long) t.tv_sec, t.tv_nsec);
270
+	ktime_get_ts64(&t);
271
+	pr_debug("**%s: %lld.%9.9ld\n", msg, t.tv_sec, t.tv_nsec);
277272 }
278273 #else
279274 #define debug_timestamp(x)
....@@ -940,42 +935,29 @@
940935 }
941936 
942937 /*
943
- * Use -1 in the nsec value of the busy waiting timespec to tell that
944
- * we are spinning in kipmid looking for something and not delaying
945
- * between checks
938
+ * Use -1 as a special constant to tell that we are spinning in kipmid
939
+ * looking for something and not delaying between checks
946940  */
947
-static inline void ipmi_si_set_not_busy(struct timespec64 *ts)
948
-{
949
-	ts->tv_nsec = -1;
950
-}
951
-static inline int ipmi_si_is_busy(struct timespec64 *ts)
952
-{
953
-	return ts->tv_nsec != -1;
954
-}
955
-
956
-static inline int ipmi_thread_busy_wait(enum si_sm_result smi_result,
957
-					const struct smi_info *smi_info,
958
-					struct timespec64 *busy_until)
941
+#define IPMI_TIME_NOT_BUSY ns_to_ktime(-1ull)
942
+static inline bool ipmi_thread_busy_wait(enum si_sm_result smi_result,
943
+					 const struct smi_info *smi_info,
944
+					 ktime_t *busy_until)
959945 {
960946 	unsigned int max_busy_us = 0;
961947 
962948 	if (smi_info->si_num < num_max_busy_us)
963949 		max_busy_us = kipmid_max_busy_us[smi_info->si_num];
964950 	if (max_busy_us == 0 || smi_result != SI_SM_CALL_WITH_DELAY)
965
-		ipmi_si_set_not_busy(busy_until);
966
-	else if (!ipmi_si_is_busy(busy_until)) {
967
-		getnstimeofday64(busy_until);
968
-		timespec64_add_ns(busy_until, max_busy_us*NSEC_PER_USEC);
951
+		*busy_until = IPMI_TIME_NOT_BUSY;
952
+	else if (*busy_until == IPMI_TIME_NOT_BUSY) {
953
+		*busy_until = ktime_get() + max_busy_us * NSEC_PER_USEC;
969954 	} else {
970
-		struct timespec64 now;
971
-
972
-		getnstimeofday64(&now);
973
-		if (unlikely(timespec64_compare(&now, busy_until) > 0)) {
974
-			ipmi_si_set_not_busy(busy_until);
975
-			return 0;
955
+		if (unlikely(ktime_get() > *busy_until)) {
956
+			*busy_until = IPMI_TIME_NOT_BUSY;
957
+			return false;
976958 		}
977959 	}
978
-	return 1;
960
+	return true;
979961 }
980962 
981963 
....@@ -986,16 +968,15 @@
986968  * that are not BT and do not have interrupts.  It starts spinning
987969  * when an operation is complete or until max_busy tells it to stop
988970  * (if that is enabled).  See the paragraph on kimid_max_busy_us in
989
- * Documentation/IPMI.txt for details.
971
+ * Documentation/driver-api/ipmi.rst for details.
990972  */
991973 static int ipmi_thread(void *data)
992974 {
993975 	struct smi_info *smi_info = data;
994976 	unsigned long flags;
995977 	enum si_sm_result smi_result;
996
-	struct timespec64 busy_until;
978
+	ktime_t busy_until = IPMI_TIME_NOT_BUSY;
997979 
998
-	ipmi_si_set_not_busy(&busy_until);
999980 	set_user_nice(current, MAX_NICE);
1000981 	while (!kthread_should_stop()) {
1001982 		int busy_wait;
....@@ -1073,10 +1054,13 @@
10731054 	atomic_set(&smi_info->req_events, 1);
10741055 }
10751056 
1076
-static void set_need_watch(void *send_info, bool enable)
1057
+static void set_need_watch(void *send_info, unsigned int watch_mask)
10771058 {
10781059 	struct smi_info *smi_info = send_info;
10791060 	unsigned long flags;
1061
+	int enable;
1062
+
1063
+	enable = !!watch_mask;
10801064 
10811065 	atomic_set(&smi_info->need_watch, enable);
10821066 	spin_lock_irqsave(&smi_info->si_lock, flags);
....@@ -1283,12 +1267,12 @@
12831267 	rv = request_irq(io->irq,
12841268 			 ipmi_si_irq_handler,
12851269 			 IRQF_SHARED,
1286
-			 DEVICE_NAME,
1270
+			 SI_DEVICE_NAME,
12871271 			 io->irq_handler_data);
12881272 	if (rv) {
12891273 		dev_warn(io->dev, "%s unable to claim interrupt %d,"
12901274 			 " running polled\n",
1291
-			 DEVICE_NAME, io->irq);
1275
+			 SI_DEVICE_NAME, io->irq);
12921276 		io->irq = 0;
12931277 	} else {
12941278 		io->irq_cleanup = std_irq_cleanup;
....@@ -1332,6 +1316,7 @@
13321316 	unsigned char         *resp;
13331317 	unsigned long         resp_len;
13341318 	int                   rv = 0;
1319
+	unsigned int          retry_count = 0;
13351320 
13361321 	resp = kmalloc(IPMI_MAX_MSG_LENGTH, GFP_KERNEL);
13371322 	if (!resp)
....@@ -1343,6 +1328,8 @@
13431328 	 */
13441329 	msg[0] = IPMI_NETFN_APP_REQUEST << 2;
13451330 	msg[1] = IPMI_GET_DEVICE_ID_CMD;
1331
+
1332
+retry:
13461333 	smi_info->handlers->start_transaction(smi_info->si_sm, msg, 2);
13471334 
13481335 	rv = wait_for_msg_done(smi_info);
....@@ -1355,6 +1342,20 @@
13551342 	/* Check and record info from the get device id, in case we need it. */
13561343 	rv = ipmi_demangle_device_id(resp[0] >> 2, resp[1],
13571344 			resp + 2, resp_len - 2, &smi_info->device_id);
1345
+	if (rv) {
1346
+		/* record completion code */
1347
+		unsigned char cc = *(resp + 2);
1348
+
1349
+		if ((cc == IPMI_DEVICE_IN_FW_UPDATE_ERR
1350
+		    || cc == IPMI_DEVICE_IN_INIT_ERR
1351
+		    || cc == IPMI_NOT_IN_MY_STATE_ERR)
1352
+		    && ++retry_count <= GET_DEVICE_ID_MAX_RETRY) {
1353
+			dev_warn(smi_info->io.dev,
1354
+			    "BMC returned 0x%2.2x, retry get bmc device id\n",
1355
+			    cc);
1356
+			goto retry;
1357
+		}
1358
+	}
13581359 
13591360 out:
13601361 	kfree(resp);
....@@ -1544,7 +1545,7 @@
15441545 
15451546 	rv = wait_for_msg_done(smi_info);
15461547 	if (rv) {
1547
-		pr_warn(PFX "Error getting response from get global enables command, the event buffer is not enabled.\n");
1548
+		pr_warn("Error getting response from get global enables command, the event buffer is not enabled\n");
15481549 		goto out;
15491550 	}
15501551 
....@@ -1555,7 +1556,7 @@
15551556 			resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
15561557 			resp[1] != IPMI_GET_BMC_GLOBAL_ENABLES_CMD   ||
15571558 			resp[2] != 0) {
1558
-		pr_warn(PFX "Invalid return from get global enables command, cannot enable the event buffer.\n");
1559
+		pr_warn("Invalid return from get global enables command, cannot enable the event buffer\n");
15591560 		rv = -EINVAL;
15601561 		goto out;
15611562 	}
....@@ -1573,7 +1574,7 @@
15731574 
15741575 	rv = wait_for_msg_done(smi_info);
15751576 	if (rv) {
1576
-		pr_warn(PFX "Error getting response from set global, enables command, the event buffer is not enabled.\n");
1577
+		pr_warn("Error getting response from set global, enables command, the event buffer is not enabled\n");
15771578 		goto out;
15781579 	}
15791580 
....@@ -1583,7 +1584,7 @@
15831584 	if (resp_len < 3 ||
15841585 			resp[0] != (IPMI_NETFN_APP_REQUEST | 1) << 2 ||
15851586 			resp[1] != IPMI_SET_BMC_GLOBAL_ENABLES_CMD) {
1586
-		pr_warn(PFX "Invalid return from get global, enables command, not enable the event buffer.\n");
1587
+		pr_warn("Invalid return from get global, enables command, not enable the event buffer\n");
15871588 		rv = -EINVAL;
15881589 		goto out;
15891590 	}
....@@ -1603,37 +1604,37 @@
16031604 }
16041605 
16051606 #define IPMI_SI_ATTR(name) \
1606
-static ssize_t ipmi_##name##_show(struct device *dev,			\
1607
-				  struct device_attribute *attr,	\
1608
-				  char *buf)				\
1607
+static ssize_t name##_show(struct device *dev,			\
1608
+			   struct device_attribute *attr,		\
1609
+			   char *buf)					\
16091610 {									\
16101611 	struct smi_info *smi_info = dev_get_drvdata(dev);		\
16111612 									\
16121613 	return snprintf(buf, 10, "%u\n", smi_get_stat(smi_info, name));	\
16131614 }									\
1614
-static DEVICE_ATTR(name, S_IRUGO, ipmi_##name##_show, NULL)
1615
+static DEVICE_ATTR(name, 0444, name##_show, NULL)
16151616 
1616
-static ssize_t ipmi_type_show(struct device *dev,
1617
-			      struct device_attribute *attr,
1618
-			      char *buf)
1617
+static ssize_t type_show(struct device *dev,
1618
+			 struct device_attribute *attr,
1619
+			 char *buf)
16191620 {
16201621 	struct smi_info *smi_info = dev_get_drvdata(dev);
16211622 
16221623 	return snprintf(buf, 10, "%s\n", si_to_str[smi_info->io.si_type]);
16231624 }
1624
-static DEVICE_ATTR(type, S_IRUGO, ipmi_type_show, NULL);
1625
+static DEVICE_ATTR(type, 0444, type_show, NULL);
16251626 
1626
-static ssize_t ipmi_interrupts_enabled_show(struct device *dev,
1627
-					    struct device_attribute *attr,
1628
-					    char *buf)
1627
+static ssize_t interrupts_enabled_show(struct device *dev,
1628
+				       struct device_attribute *attr,
1629
+				       char *buf)
16291630 {
16301631 	struct smi_info *smi_info = dev_get_drvdata(dev);
16311632 	int enabled = smi_info->io.irq && !smi_info->interrupt_disabled;
16321633 
16331634 	return snprintf(buf, 10, "%d\n", enabled);
16341635 }
1635
-static DEVICE_ATTR(interrupts_enabled, S_IRUGO,
1636
-		   ipmi_interrupts_enabled_show, NULL);
1636
+static DEVICE_ATTR(interrupts_enabled, 0444,
1637
+		   interrupts_enabled_show, NULL);
16371638 
16381639 IPMI_SI_ATTR(short_timeouts);
16391640 IPMI_SI_ATTR(long_timeouts);
....@@ -1647,16 +1648,16 @@
16471648 IPMI_SI_ATTR(watchdog_pretimeouts);
16481649 IPMI_SI_ATTR(incoming_messages);
16491650 
1650
-static ssize_t ipmi_params_show(struct device *dev,
1651
-				struct device_attribute *attr,
1652
-				char *buf)
1651
+static ssize_t params_show(struct device *dev,
1652
+			   struct device_attribute *attr,
1653
+			   char *buf)
16531654 {
16541655 	struct smi_info *smi_info = dev_get_drvdata(dev);
16551656 
16561657 	return snprintf(buf, 200,
16571658 			"%s,%s,0x%lx,rsp=%d,rsi=%d,rsh=%d,irq=%d,ipmb=%d\n",
16581659 			si_to_str[smi_info->io.si_type],
1659
-			addr_space_to_str[smi_info->io.addr_type],
1660
+			addr_space_to_str[smi_info->io.addr_space],
16601661 			smi_info->io.addr_data,
16611662 			smi_info->io.regspacing,
16621663 			smi_info->io.regsize,
....@@ -1664,7 +1665,7 @@
16641665 			smi_info->io.irq,
16651666 			smi_info->io.slave_addr);
16661667 }
1667
-static DEVICE_ATTR(params, S_IRUGO, ipmi_params_show, NULL);
1668
+static DEVICE_ATTR(params, 0444, params_show, NULL);
16681669 
16691670 static struct attribute *ipmi_si_dev_attrs[] = {
16701671 	&dev_attr_type.attr,
....@@ -1845,8 +1846,7 @@
18451846 	}
18461847 
18471848 	smi_info->timer_can_start = false;
1848
-	if (smi_info->timer_running)
1849
-		del_timer_sync(&smi_info->si_timer);
1849
+	del_timer_sync(&smi_info->si_timer);
18501850 }
18511851 
18521852 static struct smi_info *find_dup_si(struct smi_info *info)
....@@ -1854,7 +1854,7 @@
18541854 	struct smi_info *e;
18551855 
18561856 	list_for_each_entry(e, &smi_infos, link) {
1857
-		if (e->io.addr_type != info->io.addr_type)
1857
+		if (e->io.addr_space != info->io.addr_space)
18581858 			continue;
18591859 		if (e->io.addr_data == info->io.addr_data) {
18601860 			/*
....@@ -1881,17 +1881,17 @@
18811881 	 * address, they presumably want us to use it and not what is
18821882 	 * in the firmware.
18831883 	 */
1884
-	if (io->addr_source != SI_HARDCODED &&
1885
-	    ipmi_si_hardcode_match(io->addr_type, io->addr_data)) {
1884
+	if (io->addr_source != SI_HARDCODED && io->addr_source != SI_HOTMOD &&
1885
+	    ipmi_si_hardcode_match(io->addr_space, io->addr_data)) {
18861886 		dev_info(io->dev,
18871887 			 "Hard-coded device at this address already exists");
18881888 		return -ENODEV;
18891889 	}
18901890 
18911891 	if (!io->io_setup) {
1892
-		if (io->addr_type == IPMI_IO_ADDR_SPACE) {
1892
+		if (io->addr_space == IPMI_IO_ADDR_SPACE) {
18931893 			io->io_setup = ipmi_si_port_setup;
1894
-		} else if (io->addr_type == IPMI_MEM_ADDR_SPACE) {
1894
+		} else if (io->addr_space == IPMI_MEM_ADDR_SPACE) {
18951895 			io->io_setup = ipmi_si_mem_setup;
18961896 		} else {
18971897 			return -EINVAL;
....@@ -1926,7 +1926,7 @@
19261926 		}
19271927 	}
19281928 
1929
-	pr_info(PFX "Adding %s-specified %s state machine\n",
1929
+	pr_info("Adding %s-specified %s state machine\n",
19301930 		ipmi_addr_src_to_str(new_smi->io.addr_source),
19311931 		si_to_str[new_smi->io.si_type]);
19321932 
....@@ -1948,12 +1948,11 @@
19481948 {
19491949 	int rv = 0;
19501950 	int i;
1951
-	char *init_name = NULL;
19521951 
1953
-	pr_info(PFX "Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n",
1952
+	pr_info("Trying %s-specified %s state machine at %s address 0x%lx, slave address 0x%x, irq %d\n",
19541953 		ipmi_addr_src_to_str(new_smi->io.addr_source),
19551954 		si_to_str[new_smi->io.si_type],
1956
-		addr_space_to_str[new_smi->io.addr_type],
1955
+		addr_space_to_str[new_smi->io.addr_space],
19571956 		new_smi->io.addr_data,
19581957 		new_smi->io.slave_addr, new_smi->io.irq);
19591958 
....@@ -1980,24 +1979,9 @@
19801979 
19811980 	/* Do this early so it's available for logs. */
19821981 	if (!new_smi->io.dev) {
1983
-		init_name = kasprintf(GFP_KERNEL, "ipmi_si.%d",
1984
-				      new_smi->si_num);
1985
-
1986
-		/*
1987
-		 * If we don't already have a device from something
1988
-		 * else (like PCI), then register a new one.
1989
-		 */
1990
-		new_smi->pdev = platform_device_alloc("ipmi_si",
1991
-						      new_smi->si_num);
1992
-		if (!new_smi->pdev) {
1993
-			pr_err(PFX "Unable to allocate platform device\n");
1994
-			rv = -ENOMEM;
1995
-			goto out_err;
1996
-		}
1997
-		new_smi->io.dev = &new_smi->pdev->dev;
1998
-		new_smi->io.dev->driver = &ipmi_platform_driver.driver;
1999
-		/* Nulled by device_add() */
2000
-		new_smi->io.dev->init_name = init_name;
1982
+		pr_err("IPMI interface added with no device\n");
1983
+		rv = -EIO;
1984
+		goto out_err;
20011985 	}
20021986 
20031987 	/* Allocate the state machine's data and initialize it. */
....@@ -2070,17 +2054,6 @@
20702054 		atomic_set(&new_smi->req_events, 1);
20712055 	}
20722056 
2073
-	if (new_smi->pdev && !new_smi->pdev_registered) {
2074
-		rv = platform_device_add(new_smi->pdev);
2075
-		if (rv) {
2076
-			dev_err(new_smi->io.dev,
2077
-				"Unable to register system interface device: %d\n",
2078
-				rv);
2079
-			goto out_err;
2080
-		}
2081
-		new_smi->pdev_registered = true;
2082
-	}
2083
-
20842057 	dev_set_drvdata(new_smi->io.dev, new_smi);
20852058 	rv = device_add_group(new_smi->io.dev, &ipmi_si_dev_attr_group);
20862059 	if (rv) {
....@@ -2116,7 +2089,6 @@
21162089 		new_smi->io.io_cleanup = NULL;
21172090 	}
21182091 
2119
-	kfree(init_name);
21202092 	return rv;
21212093 }
21222094 
....@@ -2129,7 +2101,8 @@
21292101 		return 0;
21302102 
21312103 	ipmi_hardcode_init();
2132
-	pr_info("IPMI System Interface driver.\n");
2104
+
2105
+	pr_info("IPMI System Interface driver\n");
21332106 
21342107 	ipmi_si_platform_init();
21352108 
....@@ -2168,7 +2141,7 @@
21682141 	}
21692142 
21702143 skip_fallback_noirq:
2171
-	initialized = 1;
2144
+	initialized = true;
21722145 	mutex_unlock(&smi_infos_lock);
21732146 
21742147 	if (type)
....@@ -2178,7 +2151,7 @@
21782151 	if (unload_when_empty && list_empty(&smi_infos)) {
21792152 		mutex_unlock(&smi_infos_lock);
21802153 		cleanup_ipmi_si();
2181
-		pr_warn(PFX "Unable to find any System Interface(s)\n");
2154
+		pr_warn("Unable to find any System Interface(s)\n");
21822155 		return -ENODEV;
21832156 	} else {
21842157 		mutex_unlock(&smi_infos_lock);
....@@ -2214,7 +2187,7 @@
22142187 	 * handlers might have been running before we freed the
22152188 	 * interrupt.
22162189 	 */
2217
-	synchronize_sched();
2190
+	synchronize_rcu();
22182191 
22192192 	/*
22202193 	 * Timeouts are stopped, now make sure the interrupts are off
....@@ -2263,13 +2236,6 @@
22632236 	if (smi_info->intf)
22642237 		ipmi_unregister_smi(smi_info->intf);
22652238 
2266
-	if (smi_info->pdev) {
2267
-		if (smi_info->pdev_registered)
2268
-			platform_device_unregister(smi_info->pdev);
2269
-		else
2270
-			platform_device_put(smi_info->pdev);
2271
-	}
2272
-
22732239 	kfree(smi_info);
22742240 }
22752241 
....@@ -2291,22 +2257,27 @@
22912257 	return rv;
22922258 }
22932259 
2294
-void ipmi_si_remove_by_data(int addr_space, enum si_type si_type,
2295
-			    unsigned long addr)
2260
+struct device *ipmi_si_remove_by_data(int addr_space, enum si_type si_type,
2261
+				      unsigned long addr)
22962262 {
22972263 	/* remove */
22982264 	struct smi_info *e, *tmp_e;
2265
+	struct device *dev = NULL;
22992266 
23002267 	mutex_lock(&smi_infos_lock);
23012268 	list_for_each_entry_safe(e, tmp_e, &smi_infos, link) {
2302
-		if (e->io.addr_type != addr_space)
2269
+		if (e->io.addr_space != addr_space)
23032270 			continue;
23042271 		if (e->io.si_type != si_type)
23052272 			continue;
2306
-		if (e->io.addr_data == addr)
2273
+		if (e->io.addr_data == addr) {
2274
+			dev = get_device(e->io.dev);
23072275 			cleanup_one_si(e);
2276
+		}
23082277 	}
23092278 	mutex_unlock(&smi_infos_lock);
2279
+
2280
+	return dev;
23102281 }
23112282 
23122283 static void cleanup_ipmi_si(void)
....@@ -2328,6 +2299,7 @@
23282299 	mutex_unlock(&smi_infos_lock);
23292300 
23302301 	ipmi_si_hardcode_exit();
2302
+	ipmi_si_hotmod_exit();
23312303 }
23322304 module_exit(cleanup_ipmi_si);
23332305