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authorDamjan Marion <damarion@cisco.com>2017-09-08 12:26:12 +0200
committerDave Barach <openvpp@barachs.net>2017-09-08 15:24:50 +0000
commit3b64d6334b4e8d0759cff043a55042f88d1ccb0e (patch)
tree199b79ee32c1f5eb7596b2a4a6dbc8c1290b1b59 /src/vlib/pci
parent2234983112fb9099135fcd1da9186004cbdf6e21 (diff)
vlib: move linux-specific code to vlib/linux
Change-Id: Id79d2c2be7a98e15416a537c890a8f2dd6d4464d Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/pci')
-rw-r--r--src/vlib/pci/linux_pci.c665
1 files changed, 0 insertions, 665 deletions
diff --git a/src/vlib/pci/linux_pci.c b/src/vlib/pci/linux_pci.c
deleted file mode 100644
index 2d3c0a8807d..00000000000
--- a/src/vlib/pci/linux_pci.c
+++ /dev/null
@@ -1,665 +0,0 @@
-/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-/*
- * pci.c: Linux user space PCI bus management.
- *
- * Copyright (c) 2008 Eliot Dresselhaus
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
- * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-#include <vlib/vlib.h>
-#include <vlib/pci/pci.h>
-#include <vlib/unix/unix.h>
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <sys/ioctl.h>
-#include <net/if.h>
-#include <linux/ethtool.h>
-#include <linux/sockios.h>
-
-typedef struct
-{
- /* /sys/bus/pci/devices/... directory name for this device. */
- u8 *dev_dir_name;
-
- /* Resource file descriptors. */
- int *resource_fds;
-
- /* File descriptor for config space read/write. */
- int config_fd;
-
- /* File descriptor for /dev/uio%d */
- int uio_fd;
-
- /* Minor device for uio device. */
- u32 uio_minor;
-
- /* Index given by unix_file_add. */
- u32 unix_file_index;
-
-} linux_pci_device_t;
-
-/* Pool of PCI devices. */
-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;
-
-/* 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;
-
-clib_error_t *
-vlib_pci_bind_to_uio (vlib_pci_device_t * d, char *uio_driver_name)
-{
- clib_error_t *error = 0;
- u8 *s = 0, *driver_name = 0;
- DIR *dir = 0;
- struct dirent *e;
- int fd, clear_driver_override = 0;
- u8 *dev_dir_name = format (0, "/sys/bus/pci/devices/%U",
- format_vlib_pci_addr, &d->bus_address);
-
- s = format (s, "%v/driver%c", dev_dir_name, 0);
- driver_name = vlib_sysfs_link_to_name ((char *) s);
- vec_reset_length (s);
-
- if (driver_name &&
- ((strcmp ("vfio-pci", (char *) driver_name) == 0) ||
- (strcmp ("uio_pci_generic", (char *) driver_name) == 0) ||
- (strcmp ("igb_uio", (char *) driver_name) == 0)))
- goto done;
-
- /* 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);
-
- if (!dir)
- {
- error = clib_error_return (0, "Skipping PCI device %U: failed to "
- "read /sys/class/net",
- format_vlib_pci_addr, &d->bus_address);
- goto done;
- }
-
- fd = socket (PF_INET, SOCK_DGRAM, 0);
- if (fd < 0)
- {
- error = clib_error_return_unix (0, "socket");
- goto done;
- }
-
- while ((e = readdir (dir)))
- {
- struct ifreq ifr;
- struct ethtool_drvinfo drvinfo;
-
- if (e->d_name[0] == '.') /* skip . and .. */
- continue;
-
- memset (&ifr, 0, sizeof ifr);
- memset (&drvinfo, 0, sizeof drvinfo);
- ifr.ifr_data = (char *) &drvinfo;
- strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1);
- drvinfo.cmd = ETHTOOL_GDRVINFO;
- if (ioctl (fd, SIOCETHTOOL, &ifr) < 0)
- {
- /* Some interfaces (eg "lo") don't support this ioctl */
- if ((errno != ENOTSUP) && (errno != ENODEV))
- clib_unix_warning ("ioctl fetch intf %s bus info error",
- e->d_name);
- continue;
- }
-
- if (strcmp ((char *) s, drvinfo.bus_info))
- continue;
-
- memset (&ifr, 0, sizeof (ifr));
- strncpy (ifr.ifr_name, e->d_name, IFNAMSIZ - 1);
- if (ioctl (fd, SIOCGIFFLAGS, &ifr) < 0)
- {
- error = clib_error_return_unix (0, "ioctl fetch intf %s flags",
- e->d_name);
- close (fd);
- goto done;
- }
-
- if (ifr.ifr_flags & IFF_UP)
- {
- 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);
- close (fd);
- goto done;
- }
- }
-
- close (fd);
- vec_reset_length (s);
-
- s = format (s, "%v/driver/unbind%c", dev_dir_name, 0);
- vlib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address);
- vec_reset_length (s);
-
- s = format (s, "%v/driver_override%c", dev_dir_name, 0);
- if (access ((char *) s, F_OK) == 0)
- {
- vlib_sysfs_write ((char *) s, "%s", uio_driver_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);
- vlib_sysfs_write ((char *) s, "0x%04x 0x%04x", d->vendor_id,
- d->device_id);
- }
- vec_reset_length (s);
-
- s = format (s, "/sys/bus/pci/drivers/%s/bind%c", uio_driver_name, 0);
- vlib_sysfs_write ((char *) s, "%U", format_vlib_pci_addr, &d->bus_address);
- vec_reset_length (s);
-
- if (clear_driver_override)
- {
- s = format (s, "%v/driver_override%c", dev_dir_name, 0);
- vlib_sysfs_write ((char *) s, "%c", 0);
- vec_reset_length (s);
- }
-
-done:
- closedir (dir);
- vec_free (s);
- vec_free (dev_dir_name);
- vec_free (driver_name);
- return error;
-}
-
-
-static clib_error_t *
-scan_uio_dir (void *arg, u8 * path_name, u8 * file_name)
-{
- linux_pci_device_t *l = arg;
- unformat_input_t input;
-
- unformat_init_string (&input, (char *) file_name, vec_len (file_name));
-
- if (!unformat (&input, "uio%d", &l->uio_minor))
- abort ();
-
- unformat_free (&input);
- return 0;
-}
-
-static clib_error_t *
-linux_pci_uio_read_ready (unix_file_t * uf)
-{
- vlib_pci_main_t *pm = &pci_main;
- vlib_pci_device_t *d;
- int __attribute__ ((unused)) rv;
-
- u32 icount;
- rv = read (uf->file_descriptor, &icount, 4);
-
- d = pool_elt_at_index (pm->pci_devs, uf->private_data);
-
- if (d->interrupt_handler)
- d->interrupt_handler (d);
-
- vlib_pci_intr_enable (d);
-
- return /* no error */ 0;
-}
-
-static clib_error_t *
-linux_pci_uio_error_ready (unix_file_t * uf)
-{
- u32 error_index = (u32) uf->private_data;
-
- 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)
-{
- vlib_pci_main_t *pm = &pci_main;
- linux_pci_main_t *lpm = &linux_pci_main;
- linux_pci_device_t *l;
-
- pool_get (lpm->linux_pci_devices, l);
- l[0] = pdev[0];
-
- l->dev_dir_name = vec_dup (l->dev_dir_name);
-
- dev->os_handle = l - lpm->linux_pci_devices;
-
- {
- 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);
- }
-
- {
- 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);
- }
-
- {
- unix_file_t template = { 0 };
- unix_main_t *um = &unix_main;
-
- 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;
-
- l->unix_file_index = unix_file_add (um, &template);
- }
-}
-
-static void
-linux_pci_device_free (linux_pci_device_t * l)
-{
- 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);
-}
-
-/* Configuration space read/write. */
-clib_error_t *
-vlib_pci_read_write_config (vlib_pci_device_t * dev,
- 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;
- 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);
- else
- n = pwrite (p->config_fd, data, n_bytes, address);
-
- if (n != n_bytes)
- return clib_error_return_unix (0, "%s",
- read_or_write == VLIB_READ
- ? "read" : "write");
-
- return 0;
-}
-
-static clib_error_t *
-os_map_pci_resource_internal (uword os_handle,
- u32 resource, u8 * addr, void **result)
-{
- 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;
-
- 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)
- {
- error = clib_error_return_unix (0, "open `%s'", file_name);
- goto done;
- }
-
- if (fstat (fd, &stat_buf) < 0)
- {
- error = clib_error_return_unix (0, "fstat `%s'", file_name);
- goto done;
- }
-
- vec_validate (p->resource_fds, resource);
- p->resource_fds[resource] = fd;
- if (addr != 0)
- flags |= MAP_FIXED;
-
- *result = mmap (addr,
- /* size */ stat_buf.st_size,
- PROT_READ | PROT_WRITE, flags,
- /* file */ fd,
- /* offset */ 0);
- if (*result == (void *) -1)
- {
- error = clib_error_return_unix (0, "mmap `%s'", file_name);
- goto done;
- }
-
-done:
- if (error)
- {
- if (fd >= 0)
- close (fd);
- }
- vec_free (file_name);
- return error;
-}
-
-clib_error_t *
-vlib_pci_map_resource (vlib_pci_device_t * dev, u32 resource, void **result)
-{
- return (os_map_pci_resource_internal
- (dev->os_handle, resource, 0 /* addr */ ,
- result));
-}
-
-clib_error_t *
-vlib_pci_map_resource_fixed (vlib_pci_device_t * dev,
- u32 resource, u8 * addr, void **result)
-{
- return (os_map_pci_resource_internal
- (dev->os_handle, resource, addr, result));
-}
-
-void
-vlib_pci_free_device (vlib_pci_device_t * dev)
-{
- linux_pci_main_t *pm = &linux_pci_main;
- linux_pci_device_t *l;
-
- l = pool_elt_at_index (pm->linux_pci_devices, dev->os_handle);
- linux_pci_device_free (l);
- pool_put (pm->linux_pci_devices, l);
-}
-
-pci_device_registration_t * __attribute__ ((unused))
-pci_device_next_registered (pci_device_registration_t * r)
-{
- uword i;
-
- /* Null vendor id marks end of initialized list. */
- for (i = 0; r->supported_devices[i].vendor_id != 0; i++)
- ;
-
- return clib_elf_section_data_next (r, i * sizeof (r->supported_devices[0]));
-}
-
-static clib_error_t *
-init_device_from_registered (vlib_main_t * vm,
- vlib_pci_device_t * dev,
- linux_pci_device_t * pdev)
-{
- vlib_pci_main_t *pm = &pci_main;
- pci_device_registration_t *r;
- pci_device_id_t *i;
- clib_error_t *error;
-
- r = pm->pci_device_registrations;
-
- 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;
-}
-
-static clib_error_t *
-init_device (vlib_main_t * vm,
- vlib_pci_device_t * dev, linux_pci_device_t * pdev)
-{
- return init_device_from_registered (vm, dev, pdev);
-}
-
-static clib_error_t *
-scan_device (void *arg, u8 * dev_dir_name, u8 * ignored)
-{
- 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;
-
- 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)
- {
- error = clib_error_return_unix (0, "open `%s'", f);
- goto done;
- }
-
- pool_get (pm->pci_devs, dev);
-
- /* 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))
- {
- pool_put (pm->pci_devs, dev);
- error = clib_error_return_unix (0, "read `%s'", f);
- close (fd);
- goto done;
- }
-
- {
- 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 ();
-
- unformat_free (&input);
-
- }
-
-
- pdev.config_fd = fd;
- pdev.dev_dir_name = dev_dir_name;
-
- hash_set (pm->pci_dev_index_by_pci_addr, dev->bus_address.as_u32,
- dev - pm->pci_devs);
-
- 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;
- int 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)
- dev->product_name = data;
- else if (tag[0] == 0x90)
- dev->vpd_r = data;
- else if (tag[0] == 0x91)
- dev->vpd_w = data;
-
- data = 0;
- }
- close (fd);
- }
-
- dev->numa_node = -1;
- vec_reset_length (f);
- f = format (f, "%v/numa_node%c", dev_dir_name, 0);
- vlib_sysfs_read ((char *) f, "%u", &dev->numa_node);
-
- vec_reset_length (f);
- f = format (f, "%v/class%c", dev_dir_name, 0);
- vlib_sysfs_read ((char *) f, "0x%x", &tmp);
- dev->device_class = tmp >> 8;
-
- vec_reset_length (f);
- f = format (f, "%v/vendor%c", dev_dir_name, 0);
- vlib_sysfs_read ((char *) f, "0x%x", &tmp);
- dev->vendor_id = tmp;
-
- vec_reset_length (f);
- f = format (f, "%v/device%c", dev_dir_name, 0);
- vlib_sysfs_read ((char *) f, "0x%x", &tmp);
- dev->device_id = tmp;
-
- error = init_device (vm, dev, &pdev);
-
- vec_reset_length (f);
- f = format (f, "%v/driver%c", dev_dir_name, 0);
- dev->driver_name = vlib_sysfs_link_to_name ((char *) f);
-
-done:
- vec_free (f);
- return error;
-}
-
-clib_error_t *
-linux_pci_init (vlib_main_t * vm)
-{
- vlib_pci_main_t *pm = &pci_main;
- clib_error_t *error;
-
- pm->vlib_main = vm;
-
- if ((error = vlib_call_init_function (vm, unix_input_init)))
- 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);
-
- return error;
-}
-
-VLIB_INIT_FUNCTION (linux_pci_init);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */