X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Feal_common_pci.c;h=72547bd28569c080af69b909f0797ffc51b4dd34;hb=2eed820fd4fdea456103402e0ad13f955321e6cc;hp=af809a8188e59ab6a94baa2114e93eb1eb89d7ad;hpb=6bc2415c3387ae72f2ce3677f0e3540e734583d5;p=dpdk.git

diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index af809a8188..72547bd285 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -67,6 +67,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/queue.h>
+#include <sys/mman.h>
 
 #include <rte_interrupts.h>
 #include <rte_log.h>
@@ -74,7 +75,6 @@
 #include <rte_per_lcore.h>
 #include <rte_memory.h>
 #include <rte_memzone.h>
-#include <rte_tailq.h>
 #include <rte_eal.h>
 #include <rte_string_fns.h>
 #include <rte_common.h>
@@ -82,8 +82,23 @@
 
 #include "eal_private.h"
 
-struct pci_driver_list pci_driver_list;
-struct pci_device_list pci_device_list;
+struct pci_driver_list pci_driver_list =
+	TAILQ_HEAD_INITIALIZER(pci_driver_list);
+struct pci_device_list pci_device_list =
+	TAILQ_HEAD_INITIALIZER(pci_device_list);
+
+#define SYSFS_PCI_DEVICES "/sys/bus/pci/devices"
+
+const char *pci_get_sysfs_path(void)
+{
+	const char *path = NULL;
+
+	path = getenv("SYSFS_PCI_DEVICES");
+	if (path == NULL)
+		return SYSFS_PCI_DEVICES;
+
+	return path;
+}
 
 static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
 {
@@ -93,26 +108,192 @@ static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
 		if (devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI &&
 			devargs->type != RTE_DEVTYPE_WHITELISTED_PCI)
 			continue;
-		if (!memcmp(&dev->addr, &devargs->pci.addr, sizeof(dev->addr)))
+		if (!rte_eal_compare_pci_addr(&dev->addr, &devargs->pci.addr))
 			return devargs;
 	}
 	return NULL;
 }
 
+/* map a particular resource from a file */
+void *
+pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size,
+		 int additional_flags)
+{
+	void *mapaddr;
+
+	/* Map the PCI memory resource of device */
+	mapaddr = mmap(requested_addr, size, PROT_READ | PROT_WRITE,
+			MAP_SHARED | additional_flags, fd, offset);
+	if (mapaddr == MAP_FAILED) {
+		RTE_LOG(ERR, EAL, "%s(): cannot mmap(%d, %p, 0x%lx, 0x%lx): %s (%p)\n",
+			__func__, fd, requested_addr,
+			(unsigned long)size, (unsigned long)offset,
+			strerror(errno), mapaddr);
+	} else
+		RTE_LOG(DEBUG, EAL, "  PCI memory mapped at %p\n", mapaddr);
+
+	return mapaddr;
+}
+
+/* unmap a particular resource */
+void
+pci_unmap_resource(void *requested_addr, size_t size)
+{
+	if (requested_addr == NULL)
+		return;
+
+	/* Unmap the PCI memory resource of device */
+	if (munmap(requested_addr, size)) {
+		RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
+			__func__, requested_addr, (unsigned long)size,
+			strerror(errno));
+	} else
+		RTE_LOG(DEBUG, EAL, "  PCI memory unmapped at %p\n",
+				requested_addr);
+}
+
 /*
- * If vendor/device ID match, call the devinit() function of all
+ * If vendor/device ID match, call the probe() function of the
+ * driver.
+ */
+static int
+rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
+{
+	int ret;
+	const struct rte_pci_id *id_table;
+
+	for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
+
+		/* check if device's identifiers match the driver's ones */
+		if (id_table->vendor_id != dev->id.vendor_id &&
+				id_table->vendor_id != PCI_ANY_ID)
+			continue;
+		if (id_table->device_id != dev->id.device_id &&
+				id_table->device_id != PCI_ANY_ID)
+			continue;
+		if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
+				id_table->subsystem_vendor_id != PCI_ANY_ID)
+			continue;
+		if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
+				id_table->subsystem_device_id != PCI_ANY_ID)
+			continue;
+		if (id_table->class_id != dev->id.class_id &&
+				id_table->class_id != RTE_CLASS_ANY_ID)
+			continue;
+
+		struct rte_pci_addr *loc = &dev->addr;
+
+		RTE_LOG(INFO, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+				loc->domain, loc->bus, loc->devid, loc->function,
+				dev->device.numa_node);
+
+		/* no initialization when blacklisted, return without error */
+		if (dev->device.devargs != NULL &&
+			dev->device.devargs->type ==
+				RTE_DEVTYPE_BLACKLISTED_PCI) {
+			RTE_LOG(INFO, EAL, "  Device is blacklisted, not initializing\n");
+			return 1;
+		}
+
+		RTE_LOG(INFO, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
+				dev->id.device_id, dr->driver.name);
+
+		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
+			/* map resources for devices that use igb_uio */
+			ret = rte_eal_pci_map_device(dev);
+			if (ret != 0)
+				return ret;
+		}
+
+		/* reference driver structure */
+		dev->driver = dr;
+
+		/* call the driver probe() function */
+		ret = dr->probe(dr, dev);
+		if (ret) {
+			dev->driver = NULL;
+			if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
+				rte_eal_pci_unmap_device(dev);
+		}
+
+		return ret;
+	}
+	/* return positive value if driver doesn't support this device */
+	return 1;
+}
+
+/*
+ * If vendor/device ID match, call the remove() function of the
+ * driver.
+ */
+static int
+rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
+		struct rte_pci_device *dev)
+{
+	const struct rte_pci_id *id_table;
+
+	if ((dr == NULL) || (dev == NULL))
+		return -EINVAL;
+
+	for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
+
+		/* check if device's identifiers match the driver's ones */
+		if (id_table->vendor_id != dev->id.vendor_id &&
+				id_table->vendor_id != PCI_ANY_ID)
+			continue;
+		if (id_table->device_id != dev->id.device_id &&
+				id_table->device_id != PCI_ANY_ID)
+			continue;
+		if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
+				id_table->subsystem_vendor_id != PCI_ANY_ID)
+			continue;
+		if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
+				id_table->subsystem_device_id != PCI_ANY_ID)
+			continue;
+
+		struct rte_pci_addr *loc = &dev->addr;
+
+		RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
+				loc->domain, loc->bus, loc->devid,
+				loc->function, dev->device.numa_node);
+
+		RTE_LOG(DEBUG, EAL, "  remove driver: %x:%x %s\n", dev->id.vendor_id,
+				dev->id.device_id, dr->driver.name);
+
+		if (dr->remove && (dr->remove(dev) < 0))
+			return -1;	/* negative value is an error */
+
+		/* clear driver structure */
+		dev->driver = NULL;
+
+		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
+			/* unmap resources for devices that use igb_uio */
+			rte_eal_pci_unmap_device(dev);
+
+		return 0;
+	}
+
+	/* return positive value if driver doesn't support this device */
+	return 1;
+}
+
+/*
+ * If vendor/device ID match, call the probe() function of all
  * registered driver for the given device. Return -1 if initialization
  * failed, return 1 if no driver is found for this device.
- * For drivers with the RTE_PCI_DRV_MULTIPLE flag enabled, register
- * the same device multiple times until failure to do so.
- * It is required for non-Intel NIC drivers provided by third-parties such
- * as 6WIND.
  */
 static int
 pci_probe_all_drivers(struct rte_pci_device *dev)
 {
 	struct rte_pci_driver *dr = NULL;
-	int rc;
+	int rc = 0;
+
+	if (dev == NULL)
+		return -1;
+
+	/* Check if a driver is already loaded */
+	if (dev->driver != NULL)
+		return 0;
 
 	TAILQ_FOREACH(dr, &pci_driver_list, next) {
 		rc = rte_eal_pci_probe_one_driver(dr, dev);
@@ -120,21 +301,112 @@ pci_probe_all_drivers(struct rte_pci_device *dev)
 			/* negative value is an error */
 			return -1;
 		if (rc > 0)
-			/* positive value means driver not found */
+			/* positive value means driver doesn't support it */
+			continue;
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * If vendor/device ID match, call the remove() function of all
+ * registered driver for the given device. Return -1 if initialization
+ * failed, return 1 if no driver is found for this device.
+ */
+static int
+pci_detach_all_drivers(struct rte_pci_device *dev)
+{
+	struct rte_pci_driver *dr = NULL;
+	int rc = 0;
+
+	if (dev == NULL)
+		return -1;
+
+	TAILQ_FOREACH(dr, &pci_driver_list, next) {
+		rc = rte_eal_pci_detach_dev(dr, dev);
+		if (rc < 0)
+			/* negative value is an error */
+			return -1;
+		if (rc > 0)
+			/* positive value means driver doesn't support it */
 			continue;
-		/* initialize subsequent driver instances for this device */
-		if ((dr->drv_flags & RTE_PCI_DRV_MULTIPLE) &&
-			(dev->devargs == NULL ||
-				dev->devargs->type != RTE_DEVTYPE_BLACKLISTED_PCI))
-			while (rte_eal_pci_probe_one_driver(dr, dev) == 0)
-				;
 		return 0;
 	}
 	return 1;
 }
 
 /*
- * Scan the content of the PCI bus, and call the devinit() function for
+ * Find the pci device specified by pci address, then invoke probe function of
+ * the driver of the devive.
+ */
+int
+rte_eal_pci_probe_one(const struct rte_pci_addr *addr)
+{
+	struct rte_pci_device *dev = NULL;
+	int ret = 0;
+
+	if (addr == NULL)
+		return -1;
+
+	/* update current pci device in global list, kernel bindings might have
+	 * changed since last time we looked at it.
+	 */
+	if (pci_update_device(addr) < 0)
+		goto err_return;
+
+	TAILQ_FOREACH(dev, &pci_device_list, next) {
+		if (rte_eal_compare_pci_addr(&dev->addr, addr))
+			continue;
+
+		ret = pci_probe_all_drivers(dev);
+		if (ret)
+			goto err_return;
+		return 0;
+	}
+	return -1;
+
+err_return:
+	RTE_LOG(WARNING, EAL,
+		"Requested device " PCI_PRI_FMT " cannot be used\n",
+		addr->domain, addr->bus, addr->devid, addr->function);
+	return -1;
+}
+
+/*
+ * Detach device specified by its pci address.
+ */
+int
+rte_eal_pci_detach(const struct rte_pci_addr *addr)
+{
+	struct rte_pci_device *dev = NULL;
+	int ret = 0;
+
+	if (addr == NULL)
+		return -1;
+
+	TAILQ_FOREACH(dev, &pci_device_list, next) {
+		if (rte_eal_compare_pci_addr(&dev->addr, addr))
+			continue;
+
+		ret = pci_detach_all_drivers(dev);
+		if (ret < 0)
+			goto err_return;
+
+		TAILQ_REMOVE(&pci_device_list, dev, next);
+		free(dev);
+		return 0;
+	}
+	return -1;
+
+err_return:
+	RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
+			" cannot be used\n", dev->addr.domain, dev->addr.bus,
+			dev->addr.devid, dev->addr.function);
+	return -1;
+}
+
+/*
+ * Scan the content of the PCI bus, and call the probe() function for
  * all registered drivers that have a matching entry in its id_table
  * for discovered devices.
  */
@@ -154,7 +426,7 @@ rte_eal_pci_probe(void)
 		/* set devargs in PCI structure */
 		devargs = pci_devargs_lookup(dev);
 		if (devargs != NULL)
-			dev->devargs = devargs;
+			dev->device.devargs = devargs;
 
 		/* probe all or only whitelisted devices */
 		if (probe_all)
@@ -207,11 +479,13 @@ void
 rte_eal_pci_register(struct rte_pci_driver *driver)
 {
 	TAILQ_INSERT_TAIL(&pci_driver_list, driver, next);
+	rte_eal_driver_register(&driver->driver);
 }
 
 /* unregister a driver */
 void
 rte_eal_pci_unregister(struct rte_pci_driver *driver)
 {
+	rte_eal_driver_unregister(&driver->driver);
 	TAILQ_REMOVE(&pci_driver_list, driver, next);
 }