#include <vlib/vlib.h>
#include <vlib/pci/pci.h>
#include <vlib/unix/unix.h>
+#include <vlib/linux/vfio.h>
#include <sys/types.h>
#include <sys/stat.h>
u32 clib_file_index;
union
{
+ pci_intx_handler_function_t *intx_handler;
pci_msix_handler_function_t *msix_handler;
};
} linux_pci_irq_t;
/* Minor device for uio device. */
u32 uio_minor;
- /* Index given by clib_file_add. */
- u32 clib_file_index;
-
- /* Interrupt handler */
- void (*interrupt_handler) (vlib_pci_dev_handle_t h);
+ /* Interrupt handlers */
+ linux_pci_irq_t intx_irq;
linux_pci_irq_t *msix_irqs;
/* private data */
} linux_pci_device_t;
-typedef struct
-{
- int group;
- int fd;
- int refcnt;
-} linux_pci_vfio_iommu_group_t;
-
/* Pool of PCI devices. */
typedef struct
{
vlib_main_t *vlib_main;
linux_pci_device_t *linux_pci_devices;
- /* VFIO */
- int vfio_container_fd;
- int vfio_iommu_mode;
-
- /* pool of IOMMU groups */
- linux_pci_vfio_iommu_group_t *iommu_groups;
-
- /* iommu group pool index by group id hash */
- uword *iommu_pool_index_by_group;
-
} linux_pci_main_t;
extern linux_pci_main_t linux_pci_main;
vlib_pci_device_info_t *
vlib_pci_get_device_info (vlib_pci_addr_t * addr, clib_error_t ** error)
{
- linux_pci_main_t *lpm = &linux_pci_main;
+ linux_vfio_main_t *lvm = &vfio_main;
clib_error_t *err;
vlib_pci_device_info_t *di;
u8 *f = 0;
di->driver_name = clib_sysfs_link_to_name ((char *) f);
di->iommu_group = -1;
- if (lpm->vfio_container_fd != -1)
+ if (lvm->container_fd != -1)
{
u8 *tmpstr;
vec_reset_length (f);
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);
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);
- if (p->interrupt_handler)
- p->interrupt_handler (h);
+ if (irq->intx_handler)
+ irq->intx_handler (h);
vlib_pci_intr_enable (h);
static clib_error_t *
linux_pci_vfio_unmask_intx (linux_pci_device_t * d)
{
- clib_error_t *err = 0;
- struct vfio_irq_set i = {
- .argsz = sizeof (struct vfio_irq_set),
- .start = 0,
- .count = 1,
- .index = VFIO_PCI_INTX_IRQ_INDEX,
- .flags = VFIO_IRQ_SET_DATA_NONE | VFIO_IRQ_SET_ACTION_UNMASK,
- };
-
- if (ioctl (d->fd, VFIO_DEVICE_SET_IRQS, &i) < 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_SET_IRQS) '%U'",
- format_vlib_pci_addr, &d->addr);
- }
- return err;
-}
-
-clib_error_t *
-vlib_pci_vfio_unmask_msix (vlib_pci_dev_handle_t h, u32 start, u32 count)
-{
- linux_pci_device_t *p = linux_pci_get_device (h);
- return vfio_set_irqs (p, VFIO_PCI_MSIX_IRQ_INDEX, start, count,
+ return vfio_set_irqs (d, VFIO_PCI_INTX_IRQ_INDEX, 0, 1,
VFIO_IRQ_SET_ACTION_UNMASK, 0);
}
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 (p->interrupt_handler)
- p->interrupt_handler (h);
+ if (irq->intx_handler)
+ irq->intx_handler (h);
linux_pci_vfio_unmask_intx (p);
}
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)
+add_device_uio (linux_pci_device_t * p, vlib_pci_device_info_t * di,
+ pci_device_registration_t * r)
{
+ linux_pci_main_t *lpm = &linux_pci_main;
clib_error_t *err = 0;
- clib_file_t t = { 0 };
u8 *s = 0;
p->addr.as_u32 = di->addr.as_u32;
goto error;
}
- t.read_function = linux_pci_uio_read_ready;
- t.file_descriptor = p->fd;
- t.error_function = linux_pci_uio_error_ready;
- t.private_data = p->handle;
+ if (r && r->interrupt_handler)
+ vlib_pci_register_intx_handler (p->handle, r->interrupt_handler);
- p->clib_file_index = clib_file_add (&file_main, &t);
- p->interrupt_handler = r->interrupt_handler;
- err = r->init_function (vm, p->handle);
+ if (r && r->init_function)
+ err = r->init_function (lpm->vlib_main, p->handle);
error:
- free (s);
+ vec_free (s);
if (err)
{
if (p->config_fd != -1)
return err;
}
+clib_error_t *
+vlib_pci_register_intx_handler (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 irq_info = { 0 };
+ irq_info.argsz = sizeof (struct vfio_irq_info);
+ irq_info.index = VFIO_PCI_INTX_IRQ_INDEX;
+ if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0)
+ return clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_IRQ_INFO) '"
+ "%U'", format_vlib_pci_addr, &p->addr);
+ if (irq_info.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;
+}
+
clib_error_t *
vlib_pci_register_msix_handler (vlib_pci_dev_handle_t h, u32 start, u32 count,
pci_msix_handler_function_t * msix_handler)
VFIO_IRQ_SET_ACTION_TRIGGER, fds);
}
-static linux_pci_vfio_iommu_group_t *
-get_vfio_iommu_group (int group)
-{
- linux_pci_main_t *lpm = &linux_pci_main;
- uword *p;
-
- p = hash_get (lpm->iommu_pool_index_by_group, group);
-
- return p ? pool_elt_at_index (lpm->iommu_groups, p[0]) : 0;
-}
-
static clib_error_t *
-open_vfio_iommu_group (int group)
+add_device_vfio (linux_pci_device_t * p, vlib_pci_device_info_t * di,
+ pci_device_registration_t * r)
{
linux_pci_main_t *lpm = &linux_pci_main;
- linux_pci_vfio_iommu_group_t *g;
- clib_error_t *err = 0;
- struct vfio_group_status group_status;
- u8 *s = 0;
- int fd;
-
- g = get_vfio_iommu_group (group);
- if (g)
- {
- g->refcnt++;
- return 0;
- }
- s = format (s, "/dev/vfio/%u%c", group, 0);
- fd = open ((char *) s, O_RDWR);
- if (fd < 0)
- return clib_error_return_unix (0, "open '%s'", s);
-
- group_status.argsz = sizeof (group_status);
- if (ioctl (fd, VFIO_GROUP_GET_STATUS, &group_status) < 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_GROUP_GET_STATUS) '%s'",
- s);
- goto error;
- }
-
- if (!(group_status.flags & VFIO_GROUP_FLAGS_VIABLE))
- {
- err = clib_error_return (0, "iommu group %d is not viable (not all "
- "devices in this group bound to vfio-pci)",
- group);
- goto error;
- }
-
- if (ioctl (fd, VFIO_GROUP_SET_CONTAINER, &lpm->vfio_container_fd) < 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_GROUP_SET_CONTAINER) '%s'",
- s);
- goto error;
- }
-
- if (lpm->vfio_iommu_mode == 0)
- {
- if (ioctl (lpm->vfio_container_fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU) <
- 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_SET_IOMMU) "
- "'/dev/vfio/vfio'");
- goto error;
- }
- lpm->vfio_iommu_mode = VFIO_TYPE1_IOMMU;
- }
-
-
- pool_get (lpm->iommu_groups, g);
- g->fd = fd;
- g->refcnt = 1;
- hash_set (lpm->iommu_pool_index_by_group, group, g - lpm->iommu_groups);
- vec_free (s);
- return 0;
-error:
- close (fd);
- return err;
-}
-
-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_vfio_iommu_group_t *g;
struct vfio_device_info device_info = { 0 };
struct vfio_region_info reg = { 0 };
- struct vfio_irq_info irq_info = { 0 };
clib_error_t *err = 0;
u8 *s = 0;
"vfio-pci", format_vlib_pci_addr, &di->addr,
di->iommu_group);
- if ((err = open_vfio_iommu_group (di->iommu_group)))
+ if ((err = linux_vfio_group_get_device_fd (&p->addr, &p->fd)))
return err;
- g = get_vfio_iommu_group (di->iommu_group);
-
- s = format (s, "%U%c", format_vlib_pci_addr, &di->addr, 0);
- if ((p->fd = ioctl (g->fd, VFIO_GROUP_GET_DEVICE_FD, (char *) s)) < 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_GROUP_GET_DEVICE_FD) '%U'",
- format_vlib_pci_addr, &di->addr);
- goto error;
- }
- vec_reset_length (s);
-
device_info.argsz = sizeof (device_info);
if (ioctl (p->fd, VFIO_DEVICE_GET_INFO, &device_info) < 0)
{
goto error;
}
- irq_info.argsz = sizeof (struct vfio_irq_info);
- irq_info.index = VFIO_PCI_INTX_IRQ_INDEX;
- if (ioctl (p->fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info) < 0)
+ 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_IRQ_INFO) "
- "'%U'", format_vlib_pci_addr, &di->addr);
+ err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_INFO) '%U'",
+ format_vlib_pci_addr, &di->addr);
goto error;
}
+ p->config_offset = reg.offset;
+ p->config_fd = p->fd;
/* reset if device supports it */
if (device_info.flags & VFIO_DEVICE_FLAGS_RESET)
goto error;
}
- if ((irq_info.flags & VFIO_IRQ_INFO_EVENTFD) && irq_info.count == 1)
+ if (r && r->interrupt_handler)
{
- u8 buf[sizeof (struct vfio_irq_set) + sizeof (int)] = { 0 };
- struct vfio_irq_set *irq_set = (struct vfio_irq_set *) buf;
- clib_file_t t = { 0 };
- int efd = eventfd (0, EFD_NONBLOCK);
-
- irq_set->argsz = sizeof (buf);
- irq_set->count = 1;
- irq_set->index = VFIO_PCI_INTX_IRQ_INDEX;
- irq_set->flags =
- VFIO_IRQ_SET_DATA_EVENTFD | VFIO_IRQ_SET_ACTION_TRIGGER;
- clib_memcpy (&irq_set->data, &efd, sizeof (int));
-
- if (ioctl (p->fd, VFIO_DEVICE_SET_IRQS, irq_set) < 0)
- {
- err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_SET_IRQS) '%U'",
- format_vlib_pci_addr, &di->addr);
- goto error;
- }
-
- t.read_function = linux_pci_vfio_intx_read_ready;
- t.file_descriptor = efd;
- t.error_function = linux_pci_vfio_error_ready;
- t.private_data = p->handle;
- p->clib_file_index = clib_file_add (&file_main, &t);
-
- /* unmask the interrupt */
+ vlib_pci_register_intx_handler (p->handle, r->interrupt_handler);
linux_pci_vfio_unmask_intx (p);
}
- p->interrupt_handler = r->interrupt_handler;
-
- 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_REGION_INFO) "
- "'%U'", format_vlib_pci_addr, &di->addr);
- goto error;
- }
- p->config_offset = reg.offset;
- p->config_fd = p->fd;
-
- err = r->init_function (vm, p->handle);
+ if (r && r->init_function)
+ err = r->init_function (lpm->vlib_main, p->handle);
error:
vec_free (s);
{
if (p->fd != -1)
close (p->fd);
- if (p->config_fd != -1)
+ if (p->config_fd != -1 && p->config_fd != p->fd)
close (p->config_fd);
+ p->config_fd = p->fd = -1;
}
return err;
}
return (vlib_pci_map_region_int (h, resource, addr, result));
}
+clib_error_t *
+vlib_pci_device_open (vlib_pci_addr_t * addr,
+ pci_device_id_t ids[], vlib_pci_dev_handle_t * handle)
+{
+ 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;
+
+ di = vlib_pci_get_device_info (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->intx_irq.fd = -1;
+
+ if (di->iommu_group != -1)
+ err = add_device_vfio (p, di, 0);
+ else
+ err = add_device_uio (p, di, 0);
+ if (err)
+ goto error;
+
+ *handle = p->handle;
+
+error:
+ vlib_pci_free_device_info (di);
+ if (err)
+ {
+ memset (p, 0, sizeof (linux_pci_device_t));
+ pool_put (lpm->linux_pci_devices, p);
+ }
+
+ return err;
+}
+
+void
+vlib_pci_device_close (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)
+ {
+ irq = &p->intx_irq;
+ clib_file_del_by_index (&file_main, irq->clib_file_index);
+ close (p->config_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 (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);
+ }
+
+ /* close MSI-X irqs */
+ if (vec_len (p->msix_irqs))
+ {
+ err = vfio_set_irqs (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);
+ }
+ }
+
+ /* *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);
+ 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)
+init_device_from_registered (vlib_pci_device_info_t * di)
{
vlib_pci_main_t *pm = &pci_main;
linux_pci_main_t *lpm = &linux_pci_main;
pool_get (lpm->linux_pci_devices, p);
p->handle = p - lpm->linux_pci_devices;
+ p->intx_irq.fd = -1;
r = pm->pci_device_registrations;
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);
+ err = add_device_vfio (p, di, r);
else
- err = add_device_uio (vm, p, di, r);
+ err = add_device_uio (p, di, r);
if (err)
clib_error_report (err);
linux_pci_init (vlib_main_t * vm)
{
vlib_pci_main_t *pm = &pci_main;
- linux_pci_main_t *lpm = &linux_pci_main;
vlib_pci_addr_t *addr = 0, *addrs;
clib_error_t *error;
- int fd;
pm->vlib_main = vm;
ASSERT (sizeof (vlib_pci_addr_t) == sizeof (u32));
- fd = open ("/dev/vfio/vfio", O_RDWR);
-
- if ((fd != -1) && (ioctl (fd, VFIO_GET_API_VERSION) != VFIO_API_VERSION))
- {
- close (fd);
- fd = -1;
- }
-
- if ((fd != -1) && (ioctl (fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) == 0))
- {
- close (fd);
- fd = -1;
- }
-
- lpm->vfio_container_fd = fd;
- lpm->iommu_pool_index_by_group = hash_create (0, sizeof (uword));
-
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 (addr, 0)))
{
- init_device_from_registered (vm, d);
+ init_device_from_registered (d);
vlib_pci_free_device_info (d);
}
}