X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvlib%2Flinux%2Fpci.c;h=c6fa8a7da344e145f27265f7f1d9d3d5467e0bf9;hb=3d3b9550dbee81d3cca85c593015edf2ac3191c2;hp=790f168a35561f94f9dad59bc8384f4a85b6465d;hpb=01914ce45729833cec88c65689de9a0336cd40cc;p=vpp.git diff --git a/src/vlib/linux/pci.c b/src/vlib/linux/pci.c index 790f168a355..c6fa8a7da34 100644 --- a/src/vlib/linux/pci.c +++ b/src/vlib/linux/pci.c @@ -42,6 +42,7 @@ #include #include #include +#include #include #include @@ -51,26 +52,77 @@ #include #include #include +#include +#include + +static const char *sysfs_pci_dev_path = "/sys/bus/pci/devices"; +static const char *sysfs_pci_drv_path = "/sys/bus/pci/drivers"; +static char *sysfs_mod_vfio_noiommu = + "/sys/module/vfio/parameters/enable_unsafe_noiommu_mode"; + +#define pci_log_debug(vm, dev, f, ...) \ + vlib_log(VLIB_LOG_LEVEL_DEBUG, pci_main.log_default, "%U: " f, \ + format_vlib_pci_addr, vlib_pci_get_addr(vm, dev->handle), ## __VA_ARGS__) +#define pci_log_err(vm, dev, f, ...) \ + vlib_log(VLIB_LOG_LEVEL_ERR, pci_main.log_default, "%U: " f, \ + format_vlib_pci_addr, vlib_pci_get_addr(vm, dev->handle), ## __VA_ARGS__) + +typedef struct +{ + int fd; + void *addr; + size_t size; +} linux_pci_region_t; + +typedef struct +{ + int fd; + u32 clib_file_index; + union + { + pci_intx_handler_function_t *intx_handler; + pci_msix_handler_function_t *msix_handler; + }; +} linux_pci_irq_t; + +typedef enum +{ + LINUX_PCI_DEVICE_TYPE_UNKNOWN, + LINUX_PCI_DEVICE_TYPE_UIO, + LINUX_PCI_DEVICE_TYPE_VFIO, +} linux_pci_device_type_t; typedef struct { - /* /sys/bus/pci/devices/... directory name for this device. */ - u8 *dev_dir_name; + linux_pci_device_type_t type; + vlib_pci_dev_handle_t handle; + vlib_pci_addr_t addr; /* Resource file descriptors. */ - int *resource_fds; + linux_pci_region_t *regions; /* File descriptor for config space read/write. */ int config_fd; + u64 config_offset; + + /* Device File descriptor */ + int fd; - /* File descriptor for /dev/uio%d */ - int uio_fd; + /* read/write file descriptor for io bar */ + int io_fd; + u64 io_offset; /* Minor device for uio device. */ u32 uio_minor; - /* Index given by clib_file_add. */ - u32 clib_file_index; + /* Interrupt handlers */ + linux_pci_irq_t intx_irq; + linux_pci_irq_t *msix_irqs; + + /* private data */ + uword private_data; + + u8 supports_va_dma; } linux_pci_device_t; @@ -79,30 +131,291 @@ typedef struct { vlib_main_t *vlib_main; linux_pci_device_t *linux_pci_devices; + } linux_pci_main_t; extern linux_pci_main_t linux_pci_main; +static linux_pci_device_t * +linux_pci_get_device (vlib_pci_dev_handle_t h) +{ + linux_pci_main_t *lpm = &linux_pci_main; + return pool_elt_at_index (lpm->linux_pci_devices, h); +} + +uword +vlib_pci_get_private_data (vlib_main_t * vm, vlib_pci_dev_handle_t h) +{ + linux_pci_device_t *d = linux_pci_get_device (h); + return d->private_data; +} + +void +vlib_pci_set_private_data (vlib_main_t * vm, vlib_pci_dev_handle_t h, + uword private_data) +{ + linux_pci_device_t *d = linux_pci_get_device (h); + d->private_data = private_data; +} + +vlib_pci_addr_t * +vlib_pci_get_addr (vlib_main_t * vm, vlib_pci_dev_handle_t h) +{ + linux_pci_device_t *d = linux_pci_get_device (h); + return &d->addr; +} + /* Call to allocate/initialize the pci subsystem. This is not an init function so that users can explicitly enable pci only when it's needed. */ clib_error_t *pci_bus_init (vlib_main_t * vm); -clib_error_t *vlib_pci_bind_to_uio (vlib_pci_device_t * d, - char *uio_driver_name); - linux_pci_main_t linux_pci_main; +vlib_pci_device_info_t * +vlib_pci_get_device_info (vlib_main_t * vm, vlib_pci_addr_t * addr, + clib_error_t ** error) +{ + linux_vfio_main_t *lvm = &vfio_main; + clib_error_t *err; + vlib_pci_device_info_t *di; + u8 *f = 0; + u32 tmp; + int fd; + + di = clib_mem_alloc (sizeof (vlib_pci_device_info_t)); + clib_memset (di, 0, sizeof (vlib_pci_device_info_t)); + di->addr.as_u32 = addr->as_u32; + + u8 *dev_dir_name = format (0, "%s/%U", sysfs_pci_dev_path, + format_vlib_pci_addr, addr); + + f = format (0, "%v/config%c", dev_dir_name, 0); + fd = open ((char *) f, O_RDWR); + + /* Try read-only access if write fails. */ + if (fd < 0) + fd = open ((char *) f, O_RDONLY); + + if (fd < 0) + { + err = clib_error_return_unix (0, "open `%s'", f); + goto error; + } + + /* You can only read more that 64 bytes of config space as root; so we try to + read the full space but fall back to just the first 64 bytes. */ + if (read (fd, &di->config_data, sizeof (di->config_data)) < + sizeof (di->config0)) + { + err = clib_error_return_unix (0, "read `%s'", f); + close (fd); + goto error; + } + + { + static pci_config_header_t all_ones; + if (all_ones.vendor_id == 0) + clib_memset (&all_ones, ~0, sizeof (all_ones)); + + if (!memcmp (&di->config0.header, &all_ones, sizeof (all_ones))) + { + err = clib_error_return (0, "invalid PCI config for `%s'", f); + close (fd); + goto error; + } + } + + if (di->config0.header.header_type == 0) + pci_config_type0_little_to_host (&di->config0); + else + pci_config_type1_little_to_host (&di->config1); + + di->numa_node = -1; + vec_reset_length (f); + f = format (f, "%v/numa_node%c", dev_dir_name, 0); + err = clib_sysfs_read ((char *) f, "%u", &di->numa_node); + if (err) + { + di->numa_node = -1; + clib_error_free (err); + } + + vec_reset_length (f); + f = format (f, "%v/class%c", dev_dir_name, 0); + err = clib_sysfs_read ((char *) f, "0x%x", &tmp); + if (err) + goto error; + di->device_class = tmp >> 8; + + vec_reset_length (f); + f = format (f, "%v/vendor%c", dev_dir_name, 0); + err = clib_sysfs_read ((char *) f, "0x%x", &tmp); + if (err) + goto error; + di->vendor_id = tmp; + + vec_reset_length (f); + f = format (f, "%v/device%c", dev_dir_name, 0); + err = clib_sysfs_read ((char *) f, "0x%x", &tmp); + if (err) + goto error; + di->device_id = tmp; + + vec_reset_length (f); + f = format (f, "%v/driver%c", dev_dir_name, 0); + di->driver_name = clib_sysfs_link_to_name ((char *) f); + + di->iommu_group = -1; + if (lvm->container_fd != -1) + { + u8 *tmpstr; + vec_reset_length (f); + f = format (f, "%v/iommu_group%c", dev_dir_name, 0); + tmpstr = clib_sysfs_link_to_name ((char *) f); + if (tmpstr) + { + di->iommu_group = atoi ((char *) tmpstr); + vec_free (tmpstr); + } + vec_reset_length (f); + f = format (f, "%v/iommu_group/name%c", dev_dir_name, 0); + err = clib_sysfs_read ((char *) f, "%s", &tmpstr); + if (err == 0) + { + if (strncmp ((char *) tmpstr, "vfio-noiommu", 12) == 0) + di->flags |= VLIB_PCI_DEVICE_INFO_F_NOIOMMU; + vec_free (tmpstr); + } + else + clib_error_free (err); + } + + close (fd); + + vec_reset_length (f); + f = format (f, "%v/vpd%c", dev_dir_name, 0); + fd = open ((char *) f, O_RDONLY); + if (fd >= 0) + { + while (1) + { + u8 tag[3]; + u8 *data = 0; + uword len; + + if (read (fd, &tag, 3) != 3) + break; + + if (tag[0] != 0x82 && tag[0] != 0x90 && tag[0] != 0x91) + break; + + len = (tag[2] << 8) | tag[1]; + vec_validate (data, len); + + if (read (fd, data, len) != len) + { + vec_free (data); + break; + } + if (tag[0] == 0x82) + di->product_name = data; + else if (tag[0] == 0x90) + di->vpd_r = data; + else if (tag[0] == 0x91) + di->vpd_w = data; + + data = 0; + } + close (fd); + } + + goto done; + +error: + vlib_pci_free_device_info (di); + di = 0; + +done: + vec_free (f); + vec_free (dev_dir_name); + if (error) + *error = err; + else + clib_error_free (err); + return di; +} + +static int +directory_exists (char *path) +{ + struct stat s = { 0 }; + if (stat (path, &s) == -1) + return 0; + + return S_ISDIR (s.st_mode); +} + clib_error_t * -vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) +vlib_pci_bind_to_uio (vlib_main_t * vm, vlib_pci_addr_t * addr, + char *uio_drv_name) { clib_error_t *error = 0; u8 *s = 0, *driver_name = 0; DIR *dir = 0; struct dirent *e; + vlib_pci_device_info_t *di; int fd, clear_driver_override = 0; - u8 *dev_dir_name = format (0, "/sys/bus/pci/devices/%U", - format_vlib_pci_addr, &d->bus_address); + u8 *dev_dir_name = format (0, "%s/%U", sysfs_pci_dev_path, + format_vlib_pci_addr, addr); + + di = vlib_pci_get_device_info (vm, addr, &error); + + if (error) + return error; + + if (strncmp ("auto", uio_drv_name, 5) == 0) + { + int vfio_pci_loaded = 0; + + if (directory_exists ("/sys/module/vfio_pci")) + vfio_pci_loaded = 1; + + if (di->iommu_group != -1) + { + /* device is bound to IOMMU group */ + if (!vfio_pci_loaded) + { + error = clib_error_return (0, "Skipping PCI device %U: device " + "is bound to IOMMU group and " + "vfio-pci driver is not loaded", + format_vlib_pci_addr, addr); + goto done; + } + else + uio_drv_name = "vfio-pci"; + } + else + { + /* device is not bound to IOMMU group so we have multiple options */ + if (vfio_pci_loaded && + (error = clib_sysfs_write (sysfs_mod_vfio_noiommu, "Y")) == 0) + uio_drv_name = "vfio-pci"; + else if (directory_exists ("/sys/module/uio_pci_generic")) + uio_drv_name = "uio_pci_generic"; + else if (directory_exists ("/sys/module/igb_uio")) + uio_drv_name = "igb_uio"; + else + { + clib_error_free (error); + error = clib_error_return (0, "Skipping PCI device %U: missing " + "kernel VFIO or UIO driver", + format_vlib_pci_addr, addr); + goto done; + } + clib_error_free (error); + } + } s = format (s, "%v/driver%c", dev_dir_name, 0); driver_name = clib_sysfs_link_to_name ((char *) s); @@ -117,13 +430,13 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) /* walk trough all linux interfaces and if interface belonging to this device is founf check if interface is admin up */ dir = opendir ("/sys/class/net"); - s = format (s, "%U%c", format_vlib_pci_addr, &d->bus_address, 0); + s = format (s, "%U%c", format_vlib_pci_addr, addr, 0); if (!dir) { error = clib_error_return (0, "Skipping PCI device %U: failed to " "read /sys/class/net", - format_vlib_pci_addr, &d->bus_address); + format_vlib_pci_addr, addr); goto done; } @@ -142,10 +455,11 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) if (e->d_name[0] == '.') /* skip . and .. */ continue; - memset (&ifr, 0, sizeof ifr); - memset (&drvinfo, 0, sizeof drvinfo); + clib_memset (&ifr, 0, sizeof ifr); + clib_memset (&drvinfo, 0, sizeof drvinfo); ifr.ifr_data = (char *) &drvinfo; - strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1); + strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name)); + ifr.ifr_name[ARRAY_LEN (ifr.ifr_name) - 1] = '\0'; drvinfo.cmd = ETHTOOL_GDRVINFO; if (ioctl (fd, SIOCETHTOOL, &ifr) < 0) { @@ -159,8 +473,9 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) if (strcmp ((char *) s, drvinfo.bus_info)) continue; - memset (&ifr, 0, sizeof (ifr)); - strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1); + clib_memset (&ifr, 0, sizeof (ifr)); + strncpy (ifr.ifr_name, e->d_name, sizeof (ifr.ifr_name)); + ifr.ifr_name[ARRAY_LEN (ifr.ifr_name) - 1] = '\0'; if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0) { error = clib_error_return_unix (0, "ioctl fetch intf %s flags", @@ -173,8 +488,7 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) { error = clib_error_return (0, "Skipping PCI device %U as host " "interface %s is up", - format_vlib_pci_addr, &d->bus_address, - e->d_name); + format_vlib_pci_addr, addr, e->d_name); close (fd); goto done; } @@ -184,26 +498,26 @@ vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name) vec_reset_length (s); s = format (s, "%v/driver/unbind%c", dev_dir_name, 0); - clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address); + clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, addr); vec_reset_length (s); s = format (s, "%v/driver_override%c", dev_dir_name, 0); if (access ((char *) s, F_OK) == 0) { - clib_sysfs_write ((char *) s, "%s", uio_driver_name); + clib_sysfs_write ((char *) s, "%s", uio_drv_name); clear_driver_override = 1; } else { vec_reset_length (s); - s = format (s, "/sys/bus/pci/drivers/%s/new_id%c", uio_driver_name, 0); - clib_sysfs_write ((char *) s, "0x%04x 0x%04x", d->vendor_id, - d->device_id); + s = format (s, "%s/%s/new_id%c", sysfs_pci_drv_path, uio_drv_name, 0); + clib_sysfs_write ((char *) s, "0x%04x 0x%04x", di->vendor_id, + di->device_id); } vec_reset_length (s); - s = format (s, "/sys/bus/pci/drivers/%s/bind%c", uio_driver_name, 0); - clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address); + s = format (s, "%s/%s/bind%c", sysfs_pci_drv_path, uio_drv_name, 0); + clib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, addr); vec_reset_length (s); if (clear_driver_override) @@ -237,26 +551,89 @@ scan_uio_dir (void *arg, u8 * path_name, u8 * file_name) return 0; } +static clib_error_t * +vfio_set_irqs (vlib_main_t * vm, linux_pci_device_t * p, u32 index, u32 start, + u32 count, u32 flags, int *efds) +{ + int data_len = efds ? count * sizeof (int) : 0; + u8 buf[sizeof (struct vfio_irq_set) + data_len]; + struct vfio_irq_info ii = { 0 }; + struct vfio_irq_set *irq_set = (struct vfio_irq_set *) buf; + + + ii.argsz = sizeof (struct vfio_irq_info); + ii.index = index; + + if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &ii) < 0) + return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_IRQ_INFO) " + "'%U'", format_vlib_pci_addr, &p->addr); + + pci_log_debug (vm, p, "%s index:%u count:%u flags: %s%s%s%s(0x%x)", + __func__, ii.index, ii.count, + ii.flags & VFIO_IRQ_INFO_EVENTFD ? "eventfd " : "", + ii.flags & VFIO_IRQ_INFO_MASKABLE ? "maskable " : "", + ii.flags & VFIO_IRQ_INFO_AUTOMASKED ? "automasked " : "", + ii.flags & VFIO_IRQ_INFO_NORESIZE ? "noresize " : "", + ii.flags); + + if (ii.count < start + count) + return clib_error_return_unix (0, "vfio_set_irq: unexistng interrupt on " + "'%U'", format_vlib_pci_addr, &p->addr); + + + if (efds) + { + flags |= VFIO_IRQ_SET_DATA_EVENTFD; + clib_memcpy (&irq_set->data, efds, data_len); + } + else + flags |= VFIO_IRQ_SET_DATA_NONE; + + ASSERT ((flags & (VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_DATA_EVENTFD)) != + (VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_DATA_EVENTFD)); + + irq_set->argsz = sizeof (struct vfio_irq_set) + data_len; + irq_set->index = index; + irq_set->start = start; + irq_set->count = count; + irq_set->flags = flags; + + if (ioctl (p->fd, VFIO_DEVICE_SET_IRQS, irq_set) < 0) + return clib_error_return_unix (0, "%U:ioctl(VFIO_DEVICE_SET_IRQS) " + "[index = %u, start = %u, count = %u, " + "flags = 0x%x]", + format_vlib_pci_addr, &p->addr, + index, start, count, flags); + return 0; +} + static clib_error_t * linux_pci_uio_read_ready (clib_file_t * uf) { - vlib_pci_main_t *pm = &pci_main; - vlib_pci_device_t *d; + vlib_main_t *vm = vlib_get_main (); int __attribute__ ((unused)) rv; + vlib_pci_dev_handle_t h = uf->private_data; + linux_pci_device_t *p = linux_pci_get_device (h); + linux_pci_irq_t *irq = &p->intx_irq; u32 icount; rv = read (uf->file_descriptor, &icount, 4); - d = pool_elt_at_index (pm->pci_devs, uf->private_data); + if (irq->intx_handler) + irq->intx_handler (vm, h); - if (d->interrupt_handler) - d->interrupt_handler (d); - - vlib_pci_intr_enable (d); + vlib_pci_intr_enable (vm, h); return /* no error */ 0; } +static clib_error_t * +linux_pci_vfio_unmask_intx (vlib_main_t * vm, linux_pci_device_t * d) +{ + return vfio_set_irqs (vm, d, VFIO_PCI_INTX_IRQ_INDEX, 0, 1, + VFIO_IRQ_SET_ACTION_UNMASK, 0); +} + static clib_error_t * linux_pci_uio_error_ready (clib_file_t * uf) { @@ -265,78 +642,363 @@ linux_pci_uio_error_ready (clib_file_t * uf) return clib_error_return (0, "pci device %d: error", error_index); } -static void -add_device (vlib_pci_device_t * dev, linux_pci_device_t * pdev) +static clib_error_t * +linux_pci_vfio_msix_read_ready (clib_file_t * uf) +{ + vlib_main_t *vm = vlib_get_main (); + int __attribute__ ((unused)) rv; + vlib_pci_dev_handle_t h = uf->private_data >> 16; + u16 line = uf->private_data & 0xffff; + linux_pci_device_t *p = linux_pci_get_device (h); + linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, line); + + u64 icount; + rv = read (uf->file_descriptor, &icount, sizeof (icount)); + + if (irq->msix_handler) + irq->msix_handler (vm, h, line); + + return /* no error */ 0; +} + +static clib_error_t * +linux_pci_vfio_intx_read_ready (clib_file_t * uf) +{ + vlib_main_t *vm = vlib_get_main (); + int __attribute__ ((unused)) rv; + vlib_pci_dev_handle_t h = uf->private_data; + linux_pci_device_t *p = linux_pci_get_device (h); + linux_pci_irq_t *irq = &p->intx_irq; + + u64 icount; + rv = read (uf->file_descriptor, &icount, sizeof (icount)); + + if (irq->intx_handler) + irq->intx_handler (vm, h); + + linux_pci_vfio_unmask_intx (vm, p); + + return /* no error */ 0; +} + +static clib_error_t * +linux_pci_vfio_error_ready (clib_file_t * uf) +{ + u32 error_index = (u32) uf->private_data; + + return clib_error_return (0, "pci device %d: error", error_index); +} + +static clib_error_t * +add_device_uio (vlib_main_t * vm, linux_pci_device_t * p, + vlib_pci_device_info_t * di, pci_device_registration_t * r) { - vlib_pci_main_t *pm = &pci_main; linux_pci_main_t *lpm = &linux_pci_main; - linux_pci_device_t *l; + clib_error_t *err = 0; + u8 *s = 0; - pool_get (lpm->linux_pci_devices, l); - l[0] = pdev[0]; + p->fd = -1; + p->type = LINUX_PCI_DEVICE_TYPE_UIO; - l->dev_dir_name = vec_dup (l->dev_dir_name); + s = format (s, "%s/%U/config%c", sysfs_pci_dev_path, + format_vlib_pci_addr, &di->addr, 0); - dev->os_handle = l - lpm->linux_pci_devices; + p->config_fd = open ((char *) s, O_RDWR); + p->config_offset = 0; + vec_reset_length (s); - { - u8 *uio_dir = format (0, "%s/uio", l->dev_dir_name); - foreach_directory_file ((char *) uio_dir, scan_uio_dir, l, /* scan_dirs */ - 1); - vec_free (uio_dir); - } + if (p->config_fd == -1) + { + err = clib_error_return_unix (0, "open '%s'", s); + goto error; + } - { - char *uio_name = (char *) format (0, "/dev/uio%d%c", l->uio_minor, 0); - l->uio_fd = open (uio_name, O_RDWR); - if (l->uio_fd < 0) - clib_unix_error ("open `%s'", uio_name); - vec_free (uio_name); - } + s = format (0, "%s/%U/uio", sysfs_pci_dev_path, + format_vlib_pci_addr, &di->addr); + foreach_directory_file ((char *) s, scan_uio_dir, p, /* scan_dirs */ + 1); + vec_reset_length (s); - { - clib_file_t template = { 0 }; + s = format (s, "/dev/uio%d%c", p->uio_minor, 0); + p->fd = open ((char *) s, O_RDWR); + if (p->fd < 0) + { + err = clib_error_return_unix (0, "open '%s'", s); + goto error; + } - template.read_function = linux_pci_uio_read_ready; - template.file_descriptor = l->uio_fd; - template.error_function = linux_pci_uio_error_ready; - template.private_data = dev - pm->pci_devs; + if (r && r->interrupt_handler) + vlib_pci_register_intx_handler (vm, p->handle, r->interrupt_handler); - l->clib_file_index = clib_file_add (&file_main, &template); - } + if (r && r->init_function) + err = r->init_function (lpm->vlib_main, p->handle); + +error: + vec_free (s); + if (err) + { + if (p->config_fd != -1) + close (p->config_fd); + if (p->fd != -1) + close (p->fd); + } + return err; +} + +clib_error_t * +vlib_pci_register_intx_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, + pci_intx_handler_function_t * intx_handler) +{ + linux_pci_device_t *p = linux_pci_get_device (h); + clib_file_t t = { 0 }; + linux_pci_irq_t *irq = &p->intx_irq; + ASSERT (irq->fd == -1); + + if (p->type == LINUX_PCI_DEVICE_TYPE_VFIO) + { + struct vfio_irq_info ii = { 0 }; + ii.argsz = sizeof (struct vfio_irq_info); + ii.index = VFIO_PCI_INTX_IRQ_INDEX; + if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &ii) < 0) + return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_IRQ_INFO) '" + "%U'", format_vlib_pci_addr, &p->addr); + pci_log_debug (vm, p, "%s index:%u count:%u flags: %s%s%s%s(0x%x)", + __func__, ii.index, ii.count, + ii.flags & VFIO_IRQ_INFO_EVENTFD ? "eventfd " : "", + ii.flags & VFIO_IRQ_INFO_MASKABLE ? "maskable " : "", + ii.flags & VFIO_IRQ_INFO_AUTOMASKED ? "automasked " : "", + ii.flags & VFIO_IRQ_INFO_NORESIZE ? "noresize " : "", + ii.flags); + if (ii.count != 1) + return clib_error_return (0, "INTx interrupt does not exist on device" + "'%U'", format_vlib_pci_addr, &p->addr); + + irq->fd = eventfd (0, EFD_NONBLOCK); + if (irq->fd == -1) + return clib_error_return_unix (0, "eventfd"); + + t.file_descriptor = irq->fd; + t.read_function = linux_pci_vfio_intx_read_ready; + } + else if (p->type == LINUX_PCI_DEVICE_TYPE_UIO) + { + t.file_descriptor = p->fd; + t.read_function = linux_pci_uio_read_ready; + } + else + return 0; + + t.error_function = linux_pci_uio_error_ready; + t.private_data = p->handle; + t.description = format (0, "PCI %U INTx", format_vlib_pci_addr, &p->addr); + irq->clib_file_index = clib_file_add (&file_main, &t); + irq->intx_handler = intx_handler; + return 0; } -static void -linux_pci_device_free (linux_pci_device_t * l) +clib_error_t * +vlib_pci_register_msix_handler (vlib_main_t * vm, vlib_pci_dev_handle_t h, + u32 start, u32 count, + pci_msix_handler_function_t * msix_handler) { + clib_error_t *err = 0; + linux_pci_device_t *p = linux_pci_get_device (h); + u32 i; + + if (p->type != LINUX_PCI_DEVICE_TYPE_VFIO) + return clib_error_return (0, "vfio driver is needed for MSI-X interrupt " + "support"); + + /* *INDENT-OFF* */ + vec_validate_init_empty (p->msix_irqs, start + count - 1, (linux_pci_irq_t) + { .fd = -1}); + /* *INDENT-ON* */ + + for (i = start; i < start + count; i++) + { + clib_file_t t = { 0 }; + linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, i); + ASSERT (irq->fd == -1); + + irq->fd = eventfd (0, EFD_NONBLOCK); + if (irq->fd == -1) + { + err = clib_error_return_unix (0, "eventfd"); + goto error; + } + + t.read_function = linux_pci_vfio_msix_read_ready; + t.file_descriptor = irq->fd; + t.error_function = linux_pci_vfio_error_ready; + t.private_data = p->handle << 16 | i; + t.description = format (0, "PCI %U MSI-X #%u", format_vlib_pci_addr, + &p->addr, i); + irq->clib_file_index = clib_file_add (&file_main, &t); + irq->msix_handler = msix_handler; + } + + return 0; + +error: + while (i-- > start) + { + linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, i); + if (irq->fd != -1) + { + clib_file_del_by_index (&file_main, irq->clib_file_index); + close (irq->fd); + irq->fd = -1; + } + } + return err; +} + +clib_error_t * +vlib_pci_enable_msix_irq (vlib_main_t * vm, vlib_pci_dev_handle_t h, + u16 start, u16 count) +{ + linux_pci_device_t *p = linux_pci_get_device (h); + int fds[count]; int i; - for (i = 0; i < vec_len (l->resource_fds); i++) - if (l->resource_fds[i] > 0) - close (l->resource_fds[i]); - if (l->config_fd > 0) - close (l->config_fd); - if (l->uio_fd > 0) - close (l->uio_fd); - vec_free (l->resource_fds); - vec_free (l->dev_dir_name); + + if (p->type != LINUX_PCI_DEVICE_TYPE_VFIO) + return clib_error_return (0, "vfio driver is needed for MSI-X interrupt " + "support"); + + for (i = start; i < start + count; i++) + { + linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, i); + fds[i] = irq->fd; + } + + return vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, start, count, + VFIO_IRQ_SET_ACTION_TRIGGER, fds); +} + +clib_error_t * +vlib_pci_disable_msix_irq (vlib_main_t * vm, vlib_pci_dev_handle_t h, + u16 start, u16 count) +{ + linux_pci_device_t *p = linux_pci_get_device (h); + int i, fds[count]; + + if (p->type != LINUX_PCI_DEVICE_TYPE_VFIO) + return clib_error_return (0, "vfio driver is needed for MSI-X interrupt " + "support"); + + for (i = start; i < start + count; i++) + fds[i] = -1; + + return vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, start, count, + VFIO_IRQ_SET_ACTION_TRIGGER, fds); +} + +static clib_error_t * +add_device_vfio (vlib_main_t * vm, linux_pci_device_t * p, + vlib_pci_device_info_t * di, pci_device_registration_t * r) +{ + linux_pci_main_t *lpm = &linux_pci_main; + struct vfio_device_info device_info = { 0 }; + struct vfio_region_info reg = { 0 }; + clib_error_t *err = 0; + u8 *s = 0; + int is_noiommu; + + p->type = LINUX_PCI_DEVICE_TYPE_VFIO; + + if ((err = linux_vfio_group_get_device_fd (&p->addr, &p->fd, &is_noiommu))) + return err; + + if (is_noiommu == 0) + p->supports_va_dma = 1; + + device_info.argsz = sizeof (device_info); + if (ioctl (p->fd, VFIO_DEVICE_GET_INFO, &device_info) < 0) + { + err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) '%U'", + format_vlib_pci_addr, &di->addr); + goto error; + } + + reg.argsz = sizeof (struct vfio_region_info); + reg.index = VFIO_PCI_CONFIG_REGION_INDEX; + if (ioctl (p->fd, VFIO_DEVICE_GET_REGION_INFO, ®) < 0) + { + err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) '%U'", + format_vlib_pci_addr, &di->addr); + goto error; + } + + pci_log_debug (vm, p, "%s region_info index:%u size:0x%lx offset:0x%lx " + "flags: %s%s%s(0x%x)", __func__, + reg.index, reg.size, reg.offset, + reg.flags & VFIO_REGION_INFO_FLAG_READ ? "rd " : "", + reg.flags & VFIO_REGION_INFO_FLAG_WRITE ? "wr " : "", + reg.flags & VFIO_REGION_INFO_FLAG_MMAP ? "mmap " : "", + reg.flags); + + p->config_offset = reg.offset; + p->config_fd = p->fd; + + /* reset if device supports it */ + if (device_info.flags & VFIO_DEVICE_FLAGS_RESET) + if (ioctl (p->fd, VFIO_DEVICE_RESET) < 0) + { + err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_RESET) '%U'", + format_vlib_pci_addr, &di->addr); + goto error; + } + + if (r && r->interrupt_handler) + { + vlib_pci_register_intx_handler (vm, p->handle, r->interrupt_handler); + linux_pci_vfio_unmask_intx (vm, p); + } + + if (p->supports_va_dma) + { + vlib_buffer_pool_t *bp; + /* *INDENT-OFF* */ + vec_foreach (bp, buffer_main.buffer_pools) + { + u32 i; + vlib_physmem_map_t *pm; + pm = vlib_physmem_get_map (vm, bp->physmem_map_index); + for (i = 0; i < pm->n_pages; i++) + vfio_map_physmem_page (vm, pm->base + (i << pm->log2_page_size)); + } + /* *INDENT-ON* */ + } + + if (r && r->init_function) + err = r->init_function (lpm->vlib_main, p->handle); + +error: + vec_free (s); + if (err) + { + if (p->fd != -1) + close (p->fd); + if (p->config_fd != -1 && p->config_fd != p->fd) + close (p->config_fd); + p->config_fd = p->fd = -1; + } + return err; } /* Configuration space read/write. */ clib_error_t * -vlib_pci_read_write_config (vlib_pci_device_t * dev, +vlib_pci_read_write_config (vlib_main_t * vm, vlib_pci_dev_handle_t h, vlib_read_or_write_t read_or_write, uword address, void *data, u32 n_bytes) { - linux_pci_main_t *lpm = &linux_pci_main; - linux_pci_device_t *p; + linux_pci_device_t *p = linux_pci_get_device (h); int n; - p = pool_elt_at_index (lpm->linux_pci_devices, dev->os_handle); - if (read_or_write == VLIB_READ) - n = pread (p->config_fd, data, n_bytes, address); + n = pread (p->config_fd, data, n_bytes, p->config_offset + address); else - n = pwrite (p->config_fd, data, n_bytes, address); + n = pwrite (p->config_fd, data, n_bytes, p->config_offset + address); if (n != n_bytes) return clib_error_return_unix (0, "%s", @@ -347,294 +1009,416 @@ vlib_pci_read_write_config (vlib_pci_device_t * dev, } static clib_error_t * -os_map_pci_resource_internal (uword os_handle, - u32 resource, u8 * addr, void **result) +vlib_pci_region (vlib_main_t * vm, vlib_pci_dev_handle_t h, u32 bar, int *fd, + u64 * size, u64 * offset) { - linux_pci_main_t *pm = &linux_pci_main; - linux_pci_device_t *p; - struct stat stat_buf; - u8 *file_name; - int fd; - clib_error_t *error; - int flags = MAP_SHARED; + linux_pci_device_t *p = linux_pci_get_device (h); + clib_error_t *error = 0; + int _fd = -1; + u64 _size = 0, _offset = 0; + + ASSERT (bar <= 5); error = 0; - p = pool_elt_at_index (pm->linux_pci_devices, os_handle); - file_name = format (0, "%v/resource%d%c", p->dev_dir_name, resource, 0); - fd = open ((char *) file_name, O_RDWR); - if (fd < 0) + if (p->type == LINUX_PCI_DEVICE_TYPE_UIO) { - error = clib_error_return_unix (0, "open `%s'", file_name); - goto done; - } + u8 *file_name; + struct stat stat_buf; + file_name = format (0, "%s/%U/resource%d%c", sysfs_pci_dev_path, + format_vlib_pci_addr, &p->addr, bar, 0); + + _fd = open ((char *) file_name, O_RDWR); + if (_fd < 0) + { + error = clib_error_return_unix (0, "open `%s'", file_name); + vec_free (file_name); + return error; + } - if (fstat (fd, &stat_buf) < 0) + if (fstat (_fd, &stat_buf) < 0) + { + error = clib_error_return_unix (0, "fstat `%s'", file_name); + vec_free (file_name); + close (_fd); + return error; + } + + vec_free (file_name); + _size = stat_buf.st_size; + _offset = 0; + } + else if (p->type == LINUX_PCI_DEVICE_TYPE_VFIO) { - error = clib_error_return_unix (0, "fstat `%s'", file_name); - goto done; + struct vfio_region_info reg = { 0 }; + reg.argsz = sizeof (struct vfio_region_info); + reg.index = bar; + if (ioctl (p->fd, VFIO_DEVICE_GET_REGION_INFO, ®) < 0) + return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) " + "'%U'", format_vlib_pci_addr, + &p->addr); + _fd = p->fd; + _size = reg.size; + _offset = reg.offset; + pci_log_debug (vm, p, "%s region_info index:%u size:0x%lx offset:0x%lx " + "flags: %s%s%s(0x%x)", __func__, + reg.index, reg.size, reg.offset, + reg.flags & VFIO_REGION_INFO_FLAG_READ ? "rd " : "", + reg.flags & VFIO_REGION_INFO_FLAG_WRITE ? "wr " : "", + reg.flags & VFIO_REGION_INFO_FLAG_MMAP ? "mmap " : "", + reg.flags); } + else + ASSERT (0); + + *fd = _fd; + *size = _size; + *offset = _offset; + + return error; +} + +static clib_error_t * +vlib_pci_map_region_int (vlib_main_t * vm, vlib_pci_dev_handle_t h, + u32 bar, u8 * addr, void **result) +{ + linux_pci_device_t *p = linux_pci_get_device (h); + int fd = -1; + clib_error_t *error; + int flags = MAP_SHARED; + u64 size = 0, offset = 0; + + pci_log_debug (vm, p, "map region %u to va %p", bar, addr); - vec_validate (p->resource_fds, resource); - p->resource_fds[resource] = fd; - if (addr != 0) + if ((error = vlib_pci_region (vm, h, bar, &fd, &size, &offset))) + return error; + + if (p->type == LINUX_PCI_DEVICE_TYPE_UIO && addr != 0) flags |= MAP_FIXED; - *result = mmap (addr, - /* size */ stat_buf.st_size, - PROT_READ | PROT_WRITE, flags, - /* file */ fd, - /* offset */ 0); + *result = mmap (addr, size, PROT_READ | PROT_WRITE, flags, fd, offset); if (*result == (void *) -1) { - error = clib_error_return_unix (0, "mmap `%s'", file_name); - goto done; - } - -done: - if (error) - { - if (fd >= 0) + error = clib_error_return_unix (0, "mmap `BAR%u'", bar); + if (p->type == LINUX_PCI_DEVICE_TYPE_UIO) close (fd); + return error; } - vec_free (file_name); - return error; + + /* *INDENT-OFF* */ + vec_validate_init_empty (p->regions, bar, + (linux_pci_region_t) { .fd = -1}); + /* *INDENT-ON* */ + if (p->type == LINUX_PCI_DEVICE_TYPE_UIO) + p->regions[bar].fd = fd; + p->regions[bar].addr = *result; + p->regions[bar].size = size; + return 0; } clib_error_t * -vlib_pci_map_resource (vlib_pci_device_t * dev, u32 resource, void **result) +vlib_pci_map_region (vlib_main_t * vm, vlib_pci_dev_handle_t h, u32 resource, + void **result) { - return (os_map_pci_resource_internal - (dev->os_handle, resource, 0 /* addr */ , - result)); + return (vlib_pci_map_region_int (vm, h, resource, 0 /* addr */ , result)); } clib_error_t * -vlib_pci_map_resource_fixed (vlib_pci_device_t * dev, - u32 resource, u8 * addr, void **result) +vlib_pci_map_region_fixed (vlib_main_t * vm, vlib_pci_dev_handle_t h, + u32 resource, u8 * addr, void **result) { - return (os_map_pci_resource_internal - (dev->os_handle, resource, addr, result)); + return (vlib_pci_map_region_int (vm, h, resource, addr, result)); } -void -vlib_pci_free_device (vlib_pci_device_t * dev) +clib_error_t * +vlib_pci_io_region (vlib_main_t * vm, vlib_pci_dev_handle_t h, u32 resource) { - linux_pci_main_t *pm = &linux_pci_main; - linux_pci_device_t *l; + linux_pci_device_t *p = linux_pci_get_device (h); + clib_error_t *error = 0; + int fd = -1; + u64 size = 0, offset = 0; + + if ((error = vlib_pci_region (vm, h, resource, &fd, &size, &offset))) + return error; - l = pool_elt_at_index (pm->linux_pci_devices, dev->os_handle); - linux_pci_device_free (l); - pool_put (pm->linux_pci_devices, l); + p->io_fd = fd; + p->io_offset = offset; + return error; } -pci_device_registration_t * __attribute__ ((unused)) -pci_device_next_registered (pci_device_registration_t * r) +clib_error_t * +vlib_pci_read_write_io (vlib_main_t * vm, vlib_pci_dev_handle_t h, + vlib_read_or_write_t read_or_write, + uword offset, void *data, u32 length) { - uword i; + linux_pci_device_t *p = linux_pci_get_device (h); + int n = 0; - /* Null vendor id marks end of initialized list. */ - for (i = 0; r->supported_devices[i].vendor_id != 0; i++) - ; + if (read_or_write == VLIB_READ) + n = pread (p->io_fd, data, length, p->io_offset + offset); + else + n = pwrite (p->io_fd, data, length, p->io_offset + offset); - return clib_elf_section_data_next (r, i * sizeof (r->supported_devices[0])); + if (n != length) + return clib_error_return_unix (0, "%s", + read_or_write == VLIB_READ + ? "read" : "write"); + return 0; } -static clib_error_t * -init_device_from_registered (vlib_main_t * vm, - vlib_pci_device_t * dev, - linux_pci_device_t * pdev) +clib_error_t * +vlib_pci_map_dma (vlib_main_t * vm, vlib_pci_dev_handle_t h, void *ptr) { - vlib_pci_main_t *pm = &pci_main; - pci_device_registration_t *r; - pci_device_id_t *i; - clib_error_t *error; + linux_pci_device_t *p = linux_pci_get_device (h); - r = pm->pci_device_registrations; + if (!p->supports_va_dma) + return 0; - while (r) - { - for (i = r->supported_devices; i->vendor_id != 0; i++) - if (i->vendor_id == dev->vendor_id && i->device_id == dev->device_id) - { - error = vlib_pci_bind_to_uio (dev, "uio_pci_generic"); - if (error) - { - clib_error_report (error); - continue; - } - - add_device (dev, pdev); - dev->interrupt_handler = r->interrupt_handler; - return r->init_function (vm, dev); - } - r = r->next_registration; - } - /* No driver, close the PCI config-space FD */ - close (pdev->config_fd); - return 0; + return vfio_map_physmem_page (vm, ptr); } -static clib_error_t * -init_device (vlib_main_t * vm, - vlib_pci_device_t * dev, linux_pci_device_t * pdev) +int +vlib_pci_supports_virtual_addr_dma (vlib_main_t * vm, vlib_pci_dev_handle_t h) { - return init_device_from_registered (vm, dev, pdev); + linux_pci_device_t *p = linux_pci_get_device (h); + + return p->supports_va_dma != 0; } -static clib_error_t * -scan_device (void *arg, u8 * dev_dir_name, u8 * ignored) +clib_error_t * +vlib_pci_device_open (vlib_main_t * vm, vlib_pci_addr_t * addr, + pci_device_id_t ids[], vlib_pci_dev_handle_t * handle) { - vlib_main_t *vm = arg; - vlib_pci_main_t *pm = &pci_main; - int fd; - u8 *f; - clib_error_t *error = 0; - vlib_pci_device_t *dev; - linux_pci_device_t pdev = { 0 }; - u32 tmp; + linux_pci_main_t *lpm = &linux_pci_main; + vlib_pci_device_info_t *di; + linux_pci_device_t *p; + clib_error_t *err = 0; + pci_device_id_t *i; - f = format (0, "%v/config%c", dev_dir_name, 0); - fd = open ((char *) f, O_RDWR); + di = vlib_pci_get_device_info (vm, addr, &err); + + if (err) + return err; + for (i = ids; i->vendor_id != 0; i++) + if (i->vendor_id == di->vendor_id && i->device_id == di->device_id) + break; + + if (i->vendor_id == 0) + return clib_error_return (0, "Wrong vendor or device id"); + + pool_get (lpm->linux_pci_devices, p); + p->handle = p - lpm->linux_pci_devices; + p->addr.as_u32 = di->addr.as_u32; + p->intx_irq.fd = -1; + /* + * pci io bar read/write fd + */ + p->io_fd = -1; + + pci_log_debug (vm, p, "open vid:0x%04x did:0x%04x driver:%s iommu_group:%d", + di->vendor_id, di->device_id, di->driver_name, + di->iommu_group); + + if (strncmp ("vfio-pci", (char *) di->driver_name, 8) == 0) + err = add_device_vfio (vm, p, di, 0); + else if (strncmp ("uio_pci_generic", (char *) di->driver_name, 8) == 0) + err = add_device_uio (vm, p, di, 0); + else + err = clib_error_create ("device not bound to 'vfio-pci' or " + "'uio_pci_generic' kernel module"); + if (err) + goto error; - /* Try read-only access if write fails. */ - if (fd < 0) - fd = open ((char *) f, O_RDONLY); + *handle = p->handle; - if (fd < 0) +error: + vlib_pci_free_device_info (di); + if (err) { - error = clib_error_return_unix (0, "open `%s'", f); - goto done; + pci_log_err (vm, p, "%U", format_clib_error, err); + clib_memset (p, 0, sizeof (linux_pci_device_t)); + pool_put (lpm->linux_pci_devices, p); } - pool_get (pm->pci_devs, dev); + return err; +} - /* You can only read more that 64 bytes of config space as root; so we try to - read the full space but fall back to just the first 64 bytes. */ - if (read (fd, &dev->config_data, sizeof (dev->config_data)) != - sizeof (dev->config_data) - && read (fd, &dev->config0, - sizeof (dev->config0)) != sizeof (dev->config0)) +void +vlib_pci_device_close (vlib_main_t * vm, vlib_pci_dev_handle_t h) +{ + linux_pci_main_t *lpm = &linux_pci_main; + linux_pci_device_t *p = linux_pci_get_device (h); + linux_pci_irq_t *irq; + linux_pci_region_t *res; + clib_error_t *err = 0; + + if (p->type == LINUX_PCI_DEVICE_TYPE_UIO) { - pool_put (pm->pci_devs, dev); - error = clib_error_return_unix (0, "read `%s'", f); - close (fd); - goto done; + irq = &p->intx_irq; + clib_file_del_by_index (&file_main, irq->clib_file_index); + close (p->config_fd); + if (p->io_fd != -1) + close (p->io_fd); } + else if (p->type == LINUX_PCI_DEVICE_TYPE_VFIO) + { + irq = &p->intx_irq; + /* close INTx irqs */ + if (irq->fd != -1) + { + err = vfio_set_irqs (vm, p, VFIO_PCI_INTX_IRQ_INDEX, 0, 0, + VFIO_IRQ_SET_ACTION_TRIGGER, 0); + clib_error_free (err); + clib_file_del_by_index (&file_main, irq->clib_file_index); + close (irq->fd); + } - { - static pci_config_header_t all_ones; - if (all_ones.vendor_id == 0) - memset (&all_ones, ~0, sizeof (all_ones)); - - if (!memcmp (&dev->config0.header, &all_ones, sizeof (all_ones))) - { - pool_put (pm->pci_devs, dev); - error = clib_error_return (0, "invalid PCI config for `%s'", f); - close (fd); - goto done; - } - } - - if (dev->config0.header.header_type == 0) - pci_config_type0_little_to_host (&dev->config0); - else - pci_config_type1_little_to_host (&dev->config1); - - /* Parse bus, dev, function from directory name. */ - { - unformat_input_t input; - - unformat_init_string (&input, (char *) dev_dir_name, - vec_len (dev_dir_name)); - - if (!unformat (&input, "/sys/bus/pci/devices/%U", - unformat_vlib_pci_addr, &dev->bus_address)) - abort (); + /* close MSI-X irqs */ + if (vec_len (p->msix_irqs)) + { + err = vfio_set_irqs (vm, p, VFIO_PCI_MSIX_IRQ_INDEX, 0, 0, + VFIO_IRQ_SET_ACTION_TRIGGER, 0); + clib_error_free (err); + /* *INDENT-OFF* */ + vec_foreach (irq, p->msix_irqs) + { + if (irq->fd == -1) + continue; + clib_file_del_by_index (&file_main, irq->clib_file_index); + close (irq->fd); + } + /* *INDENT-ON* */ + vec_free (p->msix_irqs); + } + } - unformat_free (&input); + /* *INDENT-OFF* */ + vec_foreach (res, p->regions) + { + if (res->size == 0) + continue; + munmap (res->addr, res->size); + if (res->fd != -1) + close (res->fd); + } + /* *INDENT-ON* */ + vec_free (p->regions); - } + close (p->fd); + clib_memset (p, 0, sizeof (linux_pci_device_t)); + pool_put (lpm->linux_pci_devices, p); +} +void +init_device_from_registered (vlib_main_t * vm, vlib_pci_device_info_t * di) +{ + vlib_pci_main_t *pm = &pci_main; + linux_pci_main_t *lpm = &linux_pci_main; + pci_device_registration_t *r; + pci_device_id_t *i; + clib_error_t *err = 0; + linux_pci_device_t *p; - pdev.config_fd = fd; - pdev.dev_dir_name = dev_dir_name; + pool_get (lpm->linux_pci_devices, p); + p->handle = p - lpm->linux_pci_devices; + p->intx_irq.fd = -1; - hash_set (pm->pci_dev_index_by_pci_addr, dev->bus_address.as_u32, - dev - pm->pci_devs); + r = pm->pci_device_registrations; - vec_reset_length (f); - f = format (f, "%v/vpd%c", dev_dir_name, 0); - fd = open ((char *) f, O_RDONLY); - if (fd >= 0) + while (r) { - while (1) - { - u8 tag[3]; - u8 *data = 0; - int len; - - if (read (fd, &tag, 3) != 3) - break; + for (i = r->supported_devices; i->vendor_id != 0; i++) + if (i->vendor_id == di->vendor_id && i->device_id == di->device_id) + { + if (di->iommu_group != -1) + err = add_device_vfio (vm, p, di, r); + else + err = add_device_uio (vm, p, di, r); + + if (err) + clib_error_report (err); + else + return; + } + r = r->next_registration; + } - if (tag[0] != 0x82 && tag[0] != 0x90 && tag[0] != 0x91) - break; + /* No driver, close the PCI config-space FD */ + clib_memset (p, 0, sizeof (linux_pci_device_t)); + pool_put (lpm->linux_pci_devices, p); +} - len = (tag[2] << 8) | tag[1]; - vec_validate (data, len); +static clib_error_t * +scan_pci_addr (void *arg, u8 * dev_dir_name, u8 * ignored) +{ + vlib_pci_addr_t addr, **addrv = arg; + unformat_input_t input; + clib_error_t *err = 0; - if (read (fd, data, len) != len) - { - vec_free (data); - break; - } - if (tag[0] == 0x82) - dev->product_name = data; - else if (tag[0] == 0x90) - dev->vpd_r = data; - else if (tag[0] == 0x91) - dev->vpd_w = data; + unformat_init_string (&input, (char *) dev_dir_name, + vec_len (dev_dir_name)); - data = 0; - } - close (fd); - } + if (!unformat (&input, "/sys/bus/pci/devices/%U", + unformat_vlib_pci_addr, &addr)) + err = clib_error_return (0, "unformat error `%v`", dev_dir_name); - dev->numa_node = -1; - vec_reset_length (f); - f = format (f, "%v/numa_node%c", dev_dir_name, 0); - clib_sysfs_read ((char *) f, "%u", &dev->numa_node); + unformat_free (&input); - vec_reset_length (f); - f = format (f, "%v/class%c", dev_dir_name, 0); - clib_sysfs_read ((char *) f, "0x%x", &tmp); - dev->device_class = tmp >> 8; + if (err) + return err; - vec_reset_length (f); - f = format (f, "%v/vendor%c", dev_dir_name, 0); - clib_sysfs_read ((char *) f, "0x%x", &tmp); - dev->vendor_id = tmp; + vec_add1 (*addrv, addr); + return 0; +} - vec_reset_length (f); - f = format (f, "%v/device%c", dev_dir_name, 0); - clib_sysfs_read ((char *) f, "0x%x", &tmp); - dev->device_id = tmp; +static int +pci_addr_cmp (void *v1, void *v2) +{ + vlib_pci_addr_t *a1 = v1; + vlib_pci_addr_t *a2 = v2; + + if (a1->domain > a2->domain) + return 1; + if (a1->domain < a2->domain) + return -1; + if (a1->bus > a2->bus) + return 1; + if (a1->bus < a2->bus) + return -1; + if (a1->slot > a2->slot) + return 1; + if (a1->slot < a2->slot) + return -1; + if (a1->function > a2->function) + return 1; + if (a1->function < a2->function) + return -1; + return 0; +} - error = init_device (vm, dev, &pdev); +vlib_pci_addr_t * +vlib_pci_get_all_dev_addrs () +{ + vlib_pci_addr_t *addrs = 0; + clib_error_t *err; + err = foreach_directory_file ((char *) sysfs_pci_dev_path, scan_pci_addr, + &addrs, /* scan_dirs */ 0); + if (err) + { + vec_free (addrs); + return 0; + } - vec_reset_length (f); - f = format (f, "%v/driver%c", dev_dir_name, 0); - dev->driver_name = clib_sysfs_link_to_name ((char *) f); + vec_sort_with_function (addrs, pci_addr_cmp); -done: - vec_free (f); - return error; + return addrs; } clib_error_t * linux_pci_init (vlib_main_t * vm) { vlib_pci_main_t *pm = &pci_main; + vlib_pci_addr_t *addr = 0, *addrs; clib_error_t *error; pm->vlib_main = vm; @@ -643,14 +1427,19 @@ linux_pci_init (vlib_main_t * vm) return error; ASSERT (sizeof (vlib_pci_addr_t) == sizeof (u32)); - pm->pci_dev_index_by_pci_addr = hash_create (0, sizeof (uword)); - - error = foreach_directory_file ("/sys/bus/pci/devices", scan_device, vm, - /* scan_dirs */ 0); - /* Complain and continue. might not be root, etc. */ - if (error) - clib_error_report (error); + addrs = vlib_pci_get_all_dev_addrs (); + /* *INDENT-OFF* */ + vec_foreach (addr, addrs) + { + vlib_pci_device_info_t *d; + if ((d = vlib_pci_get_device_info (vm, addr, 0))) + { + init_device_from_registered (vm, d); + vlib_pci_free_device_info (d); + } + } + /* *INDENT-ON* */ return error; }