diff options
author | 2017-05-16 14:51:32 +0200 | |
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committer | 2017-05-16 14:51:32 +0200 | |
commit | fca143f059a0bddd7d47b8dc2df646a891b0eb0f (patch) | |
tree | 4bfeadc905c977e45e54a90c42330553b8942e4e /lib/librte_eal/linuxapp/eal/eal_pci.c | |
parent | ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6 (diff) |
Imported Upstream version 17.05
Diffstat (limited to 'lib/librte_eal/linuxapp/eal/eal_pci.c')
-rw-r--r-- | lib/librte_eal/linuxapp/eal/eal_pci.c | 149 |
1 files changed, 50 insertions, 99 deletions
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c index 876ba381..595622b2 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c @@ -35,6 +35,7 @@ #include <dirent.h> #include <rte_log.h> +#include <rte_bus.h> #include <rte_pci.h> #include <rte_eal_memconfig.h> #include <rte_malloc.h> @@ -54,44 +55,7 @@ * IGB_UIO driver (or doesn't initialize, if the device wasn't bound to it). */ -/* unbind kernel driver for this device */ -int -pci_unbind_kernel_driver(struct rte_pci_device *dev) -{ - int n; - FILE *f; - char filename[PATH_MAX]; - char buf[BUFSIZ]; - struct rte_pci_addr *loc = &dev->addr; - - /* open /sys/bus/pci/devices/AAAA:BB:CC.D/driver */ - snprintf(filename, sizeof(filename), - "%s/" PCI_PRI_FMT "/driver/unbind", pci_get_sysfs_path(), - loc->domain, loc->bus, loc->devid, loc->function); - - f = fopen(filename, "w"); - if (f == NULL) /* device was not bound */ - return 0; - - n = snprintf(buf, sizeof(buf), PCI_PRI_FMT "\n", - loc->domain, loc->bus, loc->devid, loc->function); - if ((n < 0) || (n >= (int)sizeof(buf))) { - RTE_LOG(ERR, EAL, "%s(): snprintf failed\n", __func__); - goto error; - } - if (fwrite(buf, n, 1, f) == 0) { - RTE_LOG(ERR, EAL, "%s(): could not write to %s\n", __func__, - filename); - goto error; - } - - fclose(f); - return 0; - -error: - fclose(f); - return -1; -} +extern struct rte_pci_bus rte_pci_bus; static int pci_get_kernel_driver_by_path(const char *filename, char *dri_name) @@ -124,7 +88,7 @@ pci_get_kernel_driver_by_path(const char *filename, char *dri_name) /* Map pci device */ int -rte_eal_pci_map_device(struct rte_pci_device *dev) +rte_pci_map_device(struct rte_pci_device *dev) { int ret = -1; @@ -138,8 +102,10 @@ rte_eal_pci_map_device(struct rte_pci_device *dev) break; case RTE_KDRV_IGB_UIO: case RTE_KDRV_UIO_GENERIC: - /* map resources for devices that use uio */ - ret = pci_uio_map_resource(dev); + if (rte_eal_using_phys_addrs()) { + /* map resources for devices that use uio */ + ret = pci_uio_map_resource(dev); + } break; default: RTE_LOG(DEBUG, EAL, @@ -153,12 +119,15 @@ rte_eal_pci_map_device(struct rte_pci_device *dev) /* Unmap pci device */ void -rte_eal_pci_unmap_device(struct rte_pci_device *dev) +rte_pci_unmap_device(struct rte_pci_device *dev) { /* try unmapping the NIC resources using VFIO if it exists */ switch (dev->kdrv) { case RTE_KDRV_VFIO: - RTE_LOG(ERR, EAL, "Hotplug doesn't support vfio yet\n"); +#ifdef VFIO_PRESENT + if (pci_vfio_is_enabled()) + pci_vfio_unmap_resource(dev); +#endif break; case RTE_KDRV_IGB_UIO: case RTE_KDRV_UIO_GENERIC: @@ -267,8 +236,7 @@ error: /* Scan one pci sysfs entry, and fill the devices list from it. */ static int -pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, - uint8_t devid, uint8_t function) +pci_scan_one(const char *dirname, const struct rte_pci_addr *addr) { char filename[PATH_MAX]; unsigned long tmp; @@ -281,10 +249,7 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, return -1; memset(dev, 0, sizeof(*dev)); - dev->addr.domain = domain; - dev->addr.bus = bus; - dev->addr.devid = devid; - dev->addr.function = function; + dev->addr = *addr; /* get vendor id */ snprintf(filename, sizeof(filename), "%s/vendor", dirname); @@ -359,6 +324,9 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, dev->device.numa_node = tmp; } + rte_pci_device_name(addr, dev->name, sizeof(dev->name)); + dev->device.name = dev->name; + /* parse resources */ snprintf(filename, sizeof(filename), "%s/resource", dirname); if (pci_parse_sysfs_resource(filename, dev) < 0) { @@ -389,21 +357,19 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, dev->kdrv = RTE_KDRV_NONE; /* device is valid, add in list (sorted) */ - if (TAILQ_EMPTY(&pci_device_list)) { - rte_eal_device_insert(&dev->device); - TAILQ_INSERT_TAIL(&pci_device_list, dev, next); + if (TAILQ_EMPTY(&rte_pci_bus.device_list)) { + rte_pci_add_device(dev); } else { struct rte_pci_device *dev2; int ret; - TAILQ_FOREACH(dev2, &pci_device_list, next) { + TAILQ_FOREACH(dev2, &rte_pci_bus.device_list, next) { ret = rte_eal_compare_pci_addr(&dev->addr, &dev2->addr); if (ret > 0) continue; if (ret < 0) { - TAILQ_INSERT_BEFORE(dev2, dev, next); - rte_eal_device_insert(&dev->device); + rte_pci_insert_device(dev2, dev); } else { /* already registered */ dev2->kdrv = dev->kdrv; dev2->max_vfs = dev->max_vfs; @@ -413,8 +379,8 @@ pci_scan_one(const char *dirname, uint16_t domain, uint8_t bus, } return 0; } - rte_eal_device_insert(&dev->device); - TAILQ_INSERT_TAIL(&pci_device_list, dev, next); + + rte_pci_add_device(dev); } return 0; @@ -429,16 +395,14 @@ pci_update_device(const struct rte_pci_addr *addr) pci_get_sysfs_path(), addr->domain, addr->bus, addr->devid, addr->function); - return pci_scan_one(filename, addr->domain, addr->bus, addr->devid, - addr->function); + return pci_scan_one(filename, addr); } /* * split up a pci address into its constituent parts. */ static int -parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain, - uint8_t *bus, uint8_t *devid, uint8_t *function) +parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr) { /* first split on ':' */ union splitaddr { @@ -466,10 +430,10 @@ parse_pci_addr_format(const char *buf, int bufsize, uint16_t *domain, /* now convert to int values */ errno = 0; - *domain = (uint16_t)strtoul(splitaddr.domain, NULL, 16); - *bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16); - *devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16); - *function = (uint8_t)strtoul(splitaddr.function, NULL, 10); + addr->domain = (uint16_t)strtoul(splitaddr.domain, NULL, 16); + addr->bus = (uint8_t)strtoul(splitaddr.bus, NULL, 16); + addr->devid = (uint8_t)strtoul(splitaddr.devid, NULL, 16); + addr->function = (uint8_t)strtoul(splitaddr.function, NULL, 10); if (errno != 0) goto error; @@ -485,13 +449,16 @@ error: * list */ int -rte_eal_pci_scan(void) +rte_pci_scan(void) { struct dirent *e; DIR *dir; char dirname[PATH_MAX]; - uint16_t domain; - uint8_t bus, devid, function; + struct rte_pci_addr addr; + + /* for debug purposes, PCI can be disabled */ + if (internal_config.no_pci) + return 0; dir = opendir(pci_get_sysfs_path()); if (dir == NULL) { @@ -504,13 +471,13 @@ rte_eal_pci_scan(void) if (e->d_name[0] == '.') continue; - if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &domain, - &bus, &devid, &function) != 0) + if (parse_pci_addr_format(e->d_name, sizeof(e->d_name), &addr) != 0) continue; snprintf(dirname, sizeof(dirname), "%s/%s", pci_get_sysfs_path(), e->d_name); - if (pci_scan_one(dirname, domain, bus, devid, function) < 0) + + if (pci_scan_one(dirname, &addr) < 0) goto error; } closedir(dir); @@ -522,8 +489,8 @@ error: } /* Read PCI config space. */ -int rte_eal_pci_read_config(const struct rte_pci_device *device, - void *buf, size_t len, off_t offset) +int rte_pci_read_config(const struct rte_pci_device *device, + void *buf, size_t len, off_t offset) { const struct rte_intr_handle *intr_handle = &device->intr_handle; @@ -547,8 +514,8 @@ int rte_eal_pci_read_config(const struct rte_pci_device *device, } /* Write PCI config space. */ -int rte_eal_pci_write_config(const struct rte_pci_device *device, - const void *buf, size_t len, off_t offset) +int rte_pci_write_config(const struct rte_pci_device *device, + const void *buf, size_t len, off_t offset) { const struct rte_intr_handle *intr_handle = &device->intr_handle; @@ -574,7 +541,7 @@ int rte_eal_pci_write_config(const struct rte_pci_device *device, #if defined(RTE_ARCH_X86) static int pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, - struct rte_pci_ioport *p) + struct rte_pci_ioport *p) { uint16_t start, end; FILE *fp; @@ -632,8 +599,8 @@ pci_ioport_map(struct rte_pci_device *dev, int bar __rte_unused, #endif int -rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar, - struct rte_pci_ioport *p) +rte_pci_ioport_map(struct rte_pci_device *dev, int bar, + struct rte_pci_ioport *p) { int ret = -1; @@ -670,8 +637,8 @@ rte_eal_pci_ioport_map(struct rte_pci_device *dev, int bar, } void -rte_eal_pci_ioport_read(struct rte_pci_ioport *p, - void *data, size_t len, off_t offset) +rte_pci_ioport_read(struct rte_pci_ioport *p, + void *data, size_t len, off_t offset) { switch (p->dev->kdrv) { #ifdef VFIO_PRESENT @@ -696,8 +663,8 @@ rte_eal_pci_ioport_read(struct rte_pci_ioport *p, } void -rte_eal_pci_ioport_write(struct rte_pci_ioport *p, - const void *data, size_t len, off_t offset) +rte_pci_ioport_write(struct rte_pci_ioport *p, + const void *data, size_t len, off_t offset) { switch (p->dev->kdrv) { #ifdef VFIO_PRESENT @@ -722,7 +689,7 @@ rte_eal_pci_ioport_write(struct rte_pci_ioport *p, } int -rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p) +rte_pci_ioport_unmap(struct rte_pci_ioport *p) { int ret = -1; @@ -754,19 +721,3 @@ rte_eal_pci_ioport_unmap(struct rte_pci_ioport *p) return ret; } - -/* Init the PCI EAL subsystem */ -int -rte_eal_pci_init(void) -{ - /* for debug purposes, PCI can be disabled */ - if (internal_config.no_pci) - return 0; - - if (rte_eal_pci_scan() < 0) { - RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__); - return -1; - } - - return 0; -} |