vlib: move linux-specific code to vlib/linux

Change-Id: Id79d2c2be7a98e15416a537c890a8f2dd6d4464d
Signed-off-by: Damjan Marion <damarion@cisco.com>

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:
- */