X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Feal_common_devargs.c;h=fcf3d9a3ccb20a0bce90a67c131540f95ef77066;hb=e863fe3a13da89787fdf3b5c590101a3c0f10af6;hp=49d43a32856336b4cb3adf68db0553f3c461c463;hpb=4969f5914c9e696c73d0aff2a3adc2f1ade606d1;p=dpdk.git

diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index 49d43a3285..fcf3d9a3cc 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -1,80 +1,171 @@
-/*-
- *   BSD LICENSE
- *
- *   Copyright 2014 6WIND S.A.
- *
- *   Redistribution and use in source and binary forms, with or without
- *   modification, are permitted provided that the following conditions
- *   are met:
- *
- *     * Redistributions of source code must retain the above copyright
- *       notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright
- *       notice, this list of conditions and the following disclaimer in
- *       the documentation and/or other materials provided with the
- *       distribution.
- *     * Neither the name of 6WIND S.A nor the names of its contributors
- *       may be used to endorse or promote products derived from this
- *       software without specific prior written permission.
- *
- *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright 2014 6WIND S.A.
  */
 
 /* This file manages the list of devices and their arguments, as given
  * by the user at startup
- *
- * Code here should not call rte_log since the EAL environment
- * may not be initialized.
  */
 
 #include <stdio.h>
 #include <string.h>
+#include <stdarg.h>
 
+#include <rte_bus.h>
+#include <rte_class.h>
+#include <rte_compat.h>
+#include <rte_dev.h>
 #include <rte_devargs.h>
+#include <rte_errno.h>
+#include <rte_kvargs.h>
+#include <rte_log.h>
+#include <rte_tailq.h>
 #include "eal_private.h"
 
+/** user device double-linked queue type definition */
+TAILQ_HEAD(rte_devargs_list, rte_devargs);
+
 /** Global list of user devices */
-struct rte_devargs_list devargs_list =
+static struct rte_devargs_list devargs_list =
 	TAILQ_HEAD_INITIALIZER(devargs_list);
 
+static size_t
+devargs_layer_count(const char *s)
+{
+	size_t i = s ? 1 : 0;
+
+	while (s != NULL && s[0] != '\0') {
+		i += s[0] == '/';
+		s++;
+	}
+	return i;
+}
+
 int
-rte_eal_parse_devargs_str(const char *devargs_str,
-			char **drvname, char **drvargs)
+rte_devargs_layers_parse(struct rte_devargs *devargs,
+			 const char *devstr)
 {
-	char *sep;
+	struct {
+		const char *key;
+		const char *str;
+		struct rte_kvargs *kvlist;
+	} layers[] = {
+		{ "bus=",    NULL, NULL, },
+		{ "class=",  NULL, NULL, },
+		{ "driver=", NULL, NULL, },
+	};
+	struct rte_kvargs_pair *kv = NULL;
+	struct rte_class *cls = NULL;
+	struct rte_bus *bus = NULL;
+	const char *s = devstr;
+	size_t nblayer;
+	size_t i = 0;
+	int ret = 0;
 
-	if ((devargs_str) == NULL || (drvname) == NULL || (drvargs == NULL))
-		return -1;
+	/* Split each sub-lists. */
+	nblayer = devargs_layer_count(devstr);
+	if (nblayer > RTE_DIM(layers)) {
+		RTE_LOG(ERR, EAL, "Invalid format: too many layers (%zu)\n",
+			nblayer);
+		ret = -E2BIG;
+		goto get_out;
+	}
 
-	*drvname = strdup(devargs_str);
-	if (*drvname == NULL)
-		return -1;
+	/* If the devargs points the devstr
+	 * as source data, then it should not allocate
+	 * anything and keep referring only to it.
+	 */
+	if (devargs->data != devstr) {
+		devargs->data = strdup(devstr);
+		if (devargs->data == NULL) {
+			RTE_LOG(ERR, EAL, "OOM\n");
+			ret = -ENOMEM;
+			goto get_out;
+		}
+		s = devargs->data;
+	}
 
-	/* set the first ',' to '\0' to split name and arguments */
-	sep = strchr(*drvname, ',');
-	if (sep != NULL) {
-		sep[0] = '\0';
-		*drvargs = strdup(sep + 1);
-	} else {
-		*drvargs = strdup("");
+	while (s != NULL) {
+		if (i >= RTE_DIM(layers)) {
+			RTE_LOG(ERR, EAL, "Unrecognized layer %s\n", s);
+			ret = -EINVAL;
+			goto get_out;
+		}
+		/*
+		 * The last layer is free-form.
+		 * The "driver" key is not required (but accepted).
+		 */
+		if (strncmp(layers[i].key, s, strlen(layers[i].key)) &&
+				i != RTE_DIM(layers) - 1)
+			goto next_layer;
+		layers[i].str = s;
+		layers[i].kvlist = rte_kvargs_parse_delim(s, NULL, "/");
+		if (layers[i].kvlist == NULL) {
+			RTE_LOG(ERR, EAL, "Could not parse %s\n", s);
+			ret = -EINVAL;
+			goto get_out;
+		}
+		s = strchr(s, '/');
+		if (s != NULL)
+			s++;
+next_layer:
+		i++;
 	}
 
-	if (*drvargs == NULL) {
-		free(*drvname);
-		*drvname = NULL;
-		return -1;
+	/* Parse each sub-list. */
+	for (i = 0; i < RTE_DIM(layers); i++) {
+		if (layers[i].kvlist == NULL)
+			continue;
+		kv = &layers[i].kvlist->pairs[0];
+		if (strcmp(kv->key, "bus") == 0) {
+			bus = rte_bus_find_by_name(kv->value);
+			if (bus == NULL) {
+				RTE_LOG(ERR, EAL, "Could not find bus \"%s\"\n",
+					kv->value);
+				ret = -EFAULT;
+				goto get_out;
+			}
+		} else if (strcmp(kv->key, "class") == 0) {
+			cls = rte_class_find_by_name(kv->value);
+			if (cls == NULL) {
+				RTE_LOG(ERR, EAL, "Could not find class \"%s\"\n",
+					kv->value);
+				ret = -EFAULT;
+				goto get_out;
+			}
+		} else if (strcmp(kv->key, "driver") == 0) {
+			/* Ignore */
+			continue;
+		}
 	}
-	return 0;
+
+	/* Fill devargs fields. */
+	devargs->bus_str = layers[0].str;
+	devargs->cls_str = layers[1].str;
+	devargs->drv_str = layers[2].str;
+	devargs->bus = bus;
+	devargs->cls = cls;
+
+	/* If we own the data, clean up a bit
+	 * the several layers string, to ease
+	 * their parsing afterward.
+	 */
+	if (devargs->data != devstr) {
+		char *s = (void *)(intptr_t)(devargs->data);
+
+		while ((s = strchr(s, '/'))) {
+			*s = '\0';
+			s++;
+		}
+	}
+
+get_out:
+	for (i = 0; i < RTE_DIM(layers); i++) {
+		if (layers[i].kvlist)
+			rte_kvargs_free(layers[i].kvlist);
+	}
+	if (ret != 0)
+		rte_errno = -ret;
+	return ret;
 }
 
 static int
@@ -84,15 +175,16 @@ bus_name_cmp(const struct rte_bus *bus, const void *name)
 }
 
 int
-rte_eal_devargs_parse(const char *dev, struct rte_devargs *da)
+rte_devargs_parse(struct rte_devargs *da, const char *dev)
 {
 	struct rte_bus *bus = NULL;
 	const char *devname;
 	const size_t maxlen = sizeof(da->name);
 	size_t i;
 
-	if (dev == NULL || da == NULL)
+	if (da == NULL)
 		return -EINVAL;
+
 	/* Retrieve eventual bus info */
 	do {
 		devname = dev;
@@ -109,7 +201,7 @@ rte_eal_devargs_parse(const char *dev, struct rte_devargs *da)
 		da->name[i] = devname[i];
 		i++;
 		if (i == maxlen) {
-			fprintf(stderr, "WARNING: Parsing \"%s\": device name should be shorter than %zu\n",
+			RTE_LOG(WARNING, EAL, "Parsing \"%s\": device name should be shorter than %zu\n",
 				dev, maxlen);
 			da->name[i - 1] = '\0';
 			return -EINVAL;
@@ -119,7 +211,7 @@ rte_eal_devargs_parse(const char *dev, struct rte_devargs *da)
 	if (bus == NULL) {
 		bus = rte_bus_find_by_device_name(da->name);
 		if (bus == NULL) {
-			fprintf(stderr, "ERROR: failed to parse device \"%s\"\n",
+			RTE_LOG(ERR, EAL, "failed to parse device \"%s\"\n",
 				da->name);
 			return -EFAULT;
 		}
@@ -131,15 +223,82 @@ rte_eal_devargs_parse(const char *dev, struct rte_devargs *da)
 	else
 		da->args = strdup("");
 	if (da->args == NULL) {
-		fprintf(stderr, "ERROR: not enough memory to parse arguments\n");
+		RTE_LOG(ERR, EAL, "not enough memory to parse arguments\n");
 		return -ENOMEM;
 	}
 	return 0;
 }
 
-/* store a whitelist parameter for later parsing */
 int
-rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str)
+rte_devargs_parsef(struct rte_devargs *da, const char *format, ...)
+{
+	va_list ap;
+	size_t len;
+	char *dev;
+	int ret;
+
+	if (da == NULL)
+		return -EINVAL;
+
+	va_start(ap, format);
+	len = vsnprintf(NULL, 0, format, ap);
+	va_end(ap);
+
+	dev = calloc(1, len + 1);
+	if (dev == NULL) {
+		RTE_LOG(ERR, EAL, "not enough memory to parse device\n");
+		return -ENOMEM;
+	}
+
+	va_start(ap, format);
+	vsnprintf(dev, len + 1, format, ap);
+	va_end(ap);
+
+	ret = rte_devargs_parse(da, dev);
+
+	free(dev);
+	return ret;
+}
+
+int
+rte_devargs_insert(struct rte_devargs **da)
+{
+	struct rte_devargs *listed_da;
+	void *tmp;
+
+	if (*da == NULL || (*da)->bus == NULL)
+		return -1;
+
+	TAILQ_FOREACH_SAFE(listed_da, &devargs_list, next, tmp) {
+		if (listed_da == *da)
+			/* devargs already in the list */
+			return 0;
+		if (strcmp(listed_da->bus->name, (*da)->bus->name) == 0 &&
+				strcmp(listed_da->name, (*da)->name) == 0) {
+			/* device already in devargs list, must be updated */
+			listed_da->type = (*da)->type;
+			listed_da->policy = (*da)->policy;
+			free(listed_da->args);
+			listed_da->args = (*da)->args;
+			listed_da->bus = (*da)->bus;
+			listed_da->cls = (*da)->cls;
+			listed_da->bus_str = (*da)->bus_str;
+			listed_da->cls_str = (*da)->cls_str;
+			listed_da->data = (*da)->data;
+			/* replace provided devargs with found one */
+			free(*da);
+			*da = listed_da;
+			return 0;
+		}
+	}
+	/* new device in the list */
+	TAILQ_INSERT_TAIL(&devargs_list, *da, next);
+	return 0;
+}
+
+/* store in allowed list parameter for later parsing */
+int
+rte_devargs_add(enum rte_devtype devtype, const char *devargs_str)
 {
 	struct rte_devargs *devargs = NULL;
 	struct rte_bus *bus = NULL;
@@ -150,26 +309,18 @@ rte_eal_devargs_add(enum rte_devtype devtype, const char *devargs_str)
 	if (devargs == NULL)
 		goto fail;
 
-	if (rte_eal_devargs_parse(dev, devargs))
+	if (rte_devargs_parse(devargs, dev))
 		goto fail;
 	devargs->type = devtype;
 	bus = devargs->bus;
-	if (devargs->type == RTE_DEVTYPE_WHITELISTED) {
-		if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
-			bus->conf.scan_mode = RTE_BUS_SCAN_WHITELIST;
-		} else if (bus->conf.scan_mode == RTE_BUS_SCAN_BLACKLIST) {
-			fprintf(stderr, "ERROR: incompatible device type and bus scan mode\n");
-			goto fail;
-		}
-	} else if (devargs->type == RTE_DEVTYPE_BLACKLISTED) {
-		if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
-			bus->conf.scan_mode = RTE_BUS_SCAN_BLACKLIST;
-		} else if (bus->conf.scan_mode == RTE_BUS_SCAN_WHITELIST) {
-			fprintf(stderr, "ERROR: incompatible device type and bus scan mode\n");
-			goto fail;
-		}
+	if (devargs->type == RTE_DEVTYPE_BLOCKED)
+		devargs->policy = RTE_DEV_BLOCKED;
+	if (bus->conf.scan_mode == RTE_BUS_SCAN_UNDEFINED) {
+		if (devargs->policy == RTE_DEV_ALLOWED)
+			bus->conf.scan_mode = RTE_BUS_SCAN_ALLOWLIST;
+		else if (devargs->policy == RTE_DEV_BLOCKED)
+			bus->conf.scan_mode = RTE_BUS_SCAN_BLOCKLIST;
 	}
-
 	TAILQ_INSERT_TAIL(&devargs_list, devargs, next);
 	return 0;
 
@@ -182,9 +333,30 @@ fail:
 	return -1;
 }
 
+int
+rte_devargs_remove(struct rte_devargs *devargs)
+{
+	struct rte_devargs *d;
+	void *tmp;
+
+	if (devargs == NULL || devargs->bus == NULL)
+		return -1;
+
+	TAILQ_FOREACH_SAFE(d, &devargs_list, next, tmp) {
+		if (strcmp(d->bus->name, devargs->bus->name) == 0 &&
+		    strcmp(d->name, devargs->name) == 0) {
+			TAILQ_REMOVE(&devargs_list, d, next);
+			free(d->args);
+			free(d);
+			return 0;
+		}
+	}
+	return 1;
+}
+
 /* count the number of devices of a specified type */
 unsigned int
-rte_eal_devargs_type_count(enum rte_devtype devtype)
+rte_devargs_type_count(enum rte_devtype devtype)
 {
 	struct rte_devargs *devargs;
 	unsigned int count = 0;
@@ -199,7 +371,7 @@ rte_eal_devargs_type_count(enum rte_devtype devtype)
 
 /* dump the user devices on the console */
 void
-rte_eal_devargs_dump(FILE *f)
+rte_devargs_dump(FILE *f)
 {
 	struct rte_devargs *devargs;
 
@@ -210,3 +382,22 @@ rte_eal_devargs_dump(FILE *f)
 			devargs->name, devargs->args);
 	}
 }
+
+/* bus-aware rte_devargs iterator. */
+struct rte_devargs *
+rte_devargs_next(const char *busname, const struct rte_devargs *start)
+{
+	struct rte_devargs *da;
+
+	if (start != NULL)
+		da = TAILQ_NEXT(start, next);
+	else
+		da = TAILQ_FIRST(&devargs_list);
+	while (da != NULL) {
+		if (busname == NULL ||
+		    (strcmp(busname, da->bus->name) == 0))
+			return da;
+		da = TAILQ_NEXT(da, next);
+	}
+	return NULL;
+}