#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>
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
+{
+ linux_pci_device_type_t type;
vlib_pci_dev_handle_t handle;
vlib_pci_addr_t addr;
+ u32 numa_node;
/* Resource file descriptors. */
- int *resource_fds;
+ linux_pci_region_t *regions;
/* File descriptor for config space read/write. */
int config_fd;
/* Device File descriptor */
int 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 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 */
uword private_data;
-} linux_pci_device_t;
+ u8 supports_va_dma;
-typedef struct
-{
- int group;
- int fd;
- int refcnt;
-} linux_pci_vfio_iommu_group_t;
+} linux_pci_device_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;
-linux_pci_device_t *
+static linux_pci_device_t *
linux_pci_get_device (vlib_pci_dev_handle_t h)
{
linux_pci_main_t *lpm = &linux_pci_main;
}
uword
-vlib_pci_get_private_data (vlib_pci_dev_handle_t h)
+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_pci_dev_handle_t h, uword private_data)
+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_pci_dev_handle_t h)
+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;
+}
+
+u32
+vlib_pci_get_numa_node (vlib_main_t * vm, vlib_pci_dev_handle_t h)
{
- linux_pci_device_t *lpm = linux_pci_get_device (h);
- return &lpm->addr;
+ linux_pci_device_t *d = linux_pci_get_device (h);
+ return d->numa_node;
}
/* Call to allocate/initialize the pci subsystem.
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)
+vlib_pci_get_device_info (vlib_main_t * vm, 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;
int fd;
di = clib_mem_alloc (sizeof (vlib_pci_device_info_t));
- memset (di, 0, 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,
/* 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->config_data)
- && read (fd, &di->config0,
- sizeof (di->config0)) != sizeof (di->config0))
+ if (read (fd, &di->config_data, sizeof (di->config_data)) <
+ sizeof (di->config0))
{
err = clib_error_return_unix (0, "read `%s'", f);
close (fd);
{
static pci_config_header_t all_ones;
if (all_ones.vendor_id == 0)
- memset (&all_ones, ~0, sizeof (all_ones));
+ clib_memset (&all_ones, ~0, sizeof (all_ones));
if (!memcmp (&di->config0.header, &all_ones, sizeof (all_ones)))
{
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);
}
clib_error_t *
-vlib_pci_bind_to_uio (vlib_pci_addr_t * addr, char *uio_drv_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;
u8 *dev_dir_name = format (0, "%s/%U", sysfs_pci_dev_path,
format_vlib_pci_addr, addr);
- di = vlib_pci_get_device_info (addr, &error);
+ di = vlib_pci_get_device_info (vm, addr, &error);
if (error)
return error;
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)
{
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",
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_fast (&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_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);
- if (p->interrupt_handler)
- p->interrupt_handler (h);
+ if (irq->intx_handler)
+ irq->intx_handler (vm, h);
- vlib_pci_intr_enable (h);
+ vlib_pci_intr_enable (vm, h);
return /* no error */ 0;
}
static clib_error_t *
-linux_pci_vfio_unmask_intx (linux_pci_device_t * d)
+linux_pci_vfio_unmask_intx (vlib_main_t * vm, 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;
+ return vfio_set_irqs (vm, d, VFIO_PCI_INTX_IRQ_INDEX, 0, 1,
+ VFIO_IRQ_SET_ACTION_UNMASK, 0);
}
static clib_error_t *
}
static clib_error_t *
-linux_pci_vfio_read_ready (clib_file_t * uf)
+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 (p->interrupt_handler)
- p->interrupt_handler (h);
+ if (irq->intx_handler)
+ irq->intx_handler (vm, h);
- linux_pci_vfio_unmask_intx (p);
+ linux_pci_vfio_unmask_intx (vm, p);
return /* no error */ 0;
}
add_device_uio (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;
clib_error_t *err = 0;
- clib_file_t t = { 0 };
u8 *s = 0;
- p->addr.as_u32 = di->addr.as_u32;
p->fd = -1;
+ p->type = LINUX_PCI_DEVICE_TYPE_UIO;
s = format (s, "%s/%U/config%c", sysfs_pci_dev_path,
format_vlib_pci_addr, &di->addr, 0);
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 (vm, 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;
}
-static linux_pci_vfio_iommu_group_t *
-get_vfio_iommu_group (int group)
+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_main_t *lpm = &linux_pci_main;
- uword *p;
+ 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);
- p = hash_get (lpm->iommu_pool_index_by_group, group);
+ 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;
- return p ? pool_elt_at_index (lpm->iommu_groups, p[0]) : 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 clib_error_t *
-open_vfio_iommu_group (int group)
+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)
{
- 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);
+ linux_pci_device_t *p = linux_pci_get_device (h);
+ u32 i;
- 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 (p->type != LINUX_PCI_DEVICE_TYPE_VFIO)
+ return clib_error_return (0, "vfio driver is needed for MSI-X interrupt "
+ "support");
- 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;
- }
+ /* *INDENT-OFF* */
+ vec_validate_init_empty (p->msix_irqs, start + count - 1, (linux_pci_irq_t)
+ { .fd = -1});
+ /* *INDENT-ON* */
- if (ioctl (fd, VFIO_GROUP_SET_CONTAINER, &lpm->vfio_container_fd) < 0)
+ for (i = start; i < start + count; i++)
{
- err = clib_error_return_unix (0, "ioctl(VFIO_GROUP_SET_CONTAINER) '%s'",
- s);
- goto error;
- }
+ clib_file_t t = { 0 };
+ linux_pci_irq_t *irq = vec_elt_at_index (p->msix_irqs, i);
+ ASSERT (irq->fd == -1);
- if (lpm->vfio_iommu_mode == 0)
- {
- if (ioctl (lpm->vfio_container_fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU) <
- 0)
+ irq->fd = eventfd (0, EFD_NONBLOCK);
+ if (irq->fd == -1)
{
- err = clib_error_return_unix (0, "ioctl(VFIO_SET_IOMMU) "
- "'/dev/vfio/vfio'");
+ err = clib_error_return_unix (0, "eventfd");
goto error;
}
- lpm->vfio_iommu_mode = VFIO_TYPE1_IOMMU;
- }
+ 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;
+ }
- 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);
+ 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;
+
+ 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_vfio_iommu_group_t *g;
+ linux_pci_main_t *lpm = &linux_pci_main;
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;
+ int is_noiommu;
- p->addr.as_u32 = di->addr.as_u32;
-
- if (di->driver_name == 0 ||
- (strcmp ("vfio-pci", (char *) di->driver_name) != 0))
- return clib_error_return (0, "Device '%U' (iommu group %d) not bound to "
- "vfio-pci", format_vlib_pci_addr, &di->addr,
- di->iommu_group);
+ p->type = LINUX_PCI_DEVICE_TYPE_VFIO;
- if ((err = open_vfio_iommu_group (di->iommu_group)))
+ if ((err = linux_vfio_group_get_device_fd (&p->addr, &p->fd, &is_noiommu)))
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);
+ 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)
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;
}
+ 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)
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_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 */
- linux_pci_vfio_unmask_intx (p);
+ vlib_pci_register_intx_handler (vm, p->handle, r->interrupt_handler);
+ linux_pci_vfio_unmask_intx (vm, 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)
+ if (p->supports_va_dma)
{
- err = clib_error_return_unix (0, "ioctl(VFIO_DEVICE_GET_REGION_INFO) "
- "'%U'", format_vlib_pci_addr, &di->addr);
- goto error;
+ 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* */
}
- 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;
}
/* Configuration space read/write. */
clib_error_t *
-vlib_pci_read_write_config (vlib_pci_dev_handle_t h,
+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)
{
}
static clib_error_t *
-vlib_pci_map_resource_int (vlib_pci_dev_handle_t h,
- 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_device_t *p = linux_pci_get_device (h);
- struct stat stat_buf;
- u8 *file_name;
- int fd;
- clib_error_t *error;
- int flags = MAP_SHARED;
+ clib_error_t *error = 0;
+ int _fd = -1;
+ u64 _size = 0, _offset = 0;
- error = 0;
+ ASSERT (bar <= 5);
- file_name = format (0, "%s/%U/resource%d%c", sysfs_pci_dev_path,
- format_vlib_pci_addr, &p->addr, resource, 0);
+ error = 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;
+}
- vec_validate (p->resource_fds, resource);
- p->resource_fds[resource] = fd;
- if (addr != 0)
+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);
+
+ 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);
+
+ /* *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_region (vlib_main_t * vm, vlib_pci_dev_handle_t h, u32 resource,
+ void **result)
+{
+ return (vlib_pci_map_region_int (vm, h, resource, 0 /* addr */ , result));
+}
+
+clib_error_t *
+vlib_pci_map_region_fixed (vlib_main_t * vm, vlib_pci_dev_handle_t h,
+ u32 resource, u8 * addr, void **result)
+{
+ return (vlib_pci_map_region_int (vm, h, resource, addr, result));
+}
+
+clib_error_t *
+vlib_pci_io_region (vlib_main_t * vm, vlib_pci_dev_handle_t h, u32 resource)
+{
+ 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;
+
+ p->io_fd = fd;
+ p->io_offset = offset;
return error;
}
clib_error_t *
-vlib_pci_map_resource (vlib_pci_dev_handle_t h, u32 resource, void **result)
+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)
{
- return (vlib_pci_map_resource_int (h, resource, 0 /* addr */ , result));
+ linux_pci_device_t *p = linux_pci_get_device (h);
+ int n = 0;
+
+ 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);
+
+ if (n != length)
+ return clib_error_return_unix (0, "%s",
+ read_or_write == VLIB_READ
+ ? "read" : "write");
+ return 0;
+}
+
+clib_error_t *
+vlib_pci_map_dma (vlib_main_t * vm, vlib_pci_dev_handle_t h, void *ptr)
+{
+ linux_pci_device_t *p = linux_pci_get_device (h);
+
+ if (!p->supports_va_dma)
+ return 0;
+
+ return vfio_map_physmem_page (vm, ptr);
+}
+
+int
+vlib_pci_supports_virtual_addr_dma (vlib_main_t * vm, vlib_pci_dev_handle_t h)
+{
+ linux_pci_device_t *p = linux_pci_get_device (h);
+
+ return p->supports_va_dma != 0;
}
clib_error_t *
-vlib_pci_map_resource_fixed (vlib_pci_dev_handle_t h,
- u32 resource, u8 * addr, void **result)
+vlib_pci_device_open (vlib_main_t * vm, 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 (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;
+ p->numa_node = di->numa_node;
+ /*
+ * 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;
+
+ *handle = p->handle;
+
+error:
+ vlib_pci_free_device_info (di);
+ if (err)
+ {
+ 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);
+ }
+
+ return err;
+}
+
+void
+vlib_pci_device_close (vlib_main_t * vm, vlib_pci_dev_handle_t h)
{
- return (vlib_pci_map_resource_int (h, resource, addr, result));
+ 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);
+ 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);
+ }
+
+ /* 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);
+ }
+ }
+
+ /* *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
pool_get (lpm->linux_pci_devices, p);
p->handle = p - lpm->linux_pci_devices;
+ p->intx_irq.fd = -1;
r = pm->pci_device_registrations;
}
/* No driver, close the PCI config-space FD */
- memset (p, 0, sizeof (linux_pci_device_t));
+ clib_memset (p, 0, sizeof (linux_pci_device_t));
pool_put (lpm->linux_pci_devices, p);
}
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)))
+ if ((d = vlib_pci_get_device_info (vm, addr, 0)))
{
init_device_from_registered (vm, d);
vlib_pci_free_device_info (d);
Code Review / vpp.git / blobdiff