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ethdev: convert to EAL hotplug

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Remove bus logic from ethdev hotplug by using eal for this.

Current api is preserved:
- the last port that has been created is tracked to return it to the
  application when attaching,
- the internal device name is reused when detaching.

We can not get rid of ethdev hotplug yet since we still need some
mechanism to inform applications of port creation/removal to substitute
for ethdev hotplug api.

dev_type field in struct rte_eth_dev and rte_eth_dev_allocate are kept as
is, but this information is not needed anymore and is removed in the
following commit.

Signed-off-by: David Marchand <david.marchand@6wind.com>
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
This commit is contained in:
David Marchand 2016-09-20 18:11:25 +05:30 committed by Thomas Monjalon
parent e8c528cb92
commit b0fb266855
1 changed files with 37 additions and 174 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

201
lib/librte_ether/rte_ethdev.c
View File

@ -71,6 +71,7 @@
static const char *MZ_RTE_ETH_DEV_DATA = "rte_eth_dev_data";
struct rte_eth_dev rte_eth_devices[RTE_MAX_ETHPORTS];
static struct rte_eth_dev_data *rte_eth_dev_data;
static uint8_t eth_dev_last_created_port;
static uint8_t nb_ports;
/* spinlock for eth device callbacks */
@ -215,6 +216,7 @@ rte_eth_dev_allocate(const char *name, enum rte_eth_dev_type type)
eth_dev->data->port_id = port_id;
eth_dev->attached = DEV_ATTACHED;
eth_dev->dev_type = type;
eth_dev_last_created_port = port_id;
nb_ports++;
return eth_dev;
}
@ -346,27 +348,6 @@ rte_eth_dev_count(void)
return nb_ports;
}
static enum rte_eth_dev_type
rte_eth_dev_get_device_type(uint8_t port_id)
{
RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, RTE_ETH_DEV_UNKNOWN);
return rte_eth_devices[port_id].dev_type;
}
static int
rte_eth_dev_get_addr_by_port(uint8_t port_id, struct rte_pci_addr *addr)
{
RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -EINVAL);
if (addr == NULL) {
RTE_PMD_DEBUG_TRACE("Null pointer is specified\n");
return -EINVAL;
}
*addr = rte_eth_devices[port_id].pci_dev->addr;
return 0;
}
int
rte_eth_dev_get_name_by_port(uint8_t port_id, char *name)
{
@ -411,34 +392,6 @@ rte_eth_dev_get_port_by_name(const char *name, uint8_t *port_id)
return -ENODEV;
}
static int
rte_eth_dev_get_port_by_addr(const struct rte_pci_addr *addr, uint8_t *port_id)
{
int i;
struct rte_pci_device *pci_dev = NULL;
if (addr == NULL) {
RTE_PMD_DEBUG_TRACE("Null pointer is specified\n");
return -EINVAL;
}
*port_id = RTE_MAX_ETHPORTS;
for (i = 0; i < RTE_MAX_ETHPORTS; i++) {
pci_dev = rte_eth_devices[i].pci_dev;
if (pci_dev &&
!rte_eal_compare_pci_addr(&pci_dev->addr, addr)) {
*port_id = i;
return 0;
}
}
return -ENODEV;
}
static int
rte_eth_dev_is_detachable(uint8_t port_id)
{
@ -464,124 +417,49 @@ rte_eth_dev_is_detachable(uint8_t port_id)
return 1;
}
/* attach the new physical device, then store port_id of the device */
static int
rte_eth_dev_attach_pdev(struct rte_pci_addr *addr, uint8_t *port_id)
{
/* Invoke probe func of the driver can handle the new device. */
if (rte_eal_pci_probe_one(addr))
goto err;
if (rte_eth_dev_get_port_by_addr(addr, port_id))
goto err;
return 0;
err:
return -1;
}
/* detach the new physical device, then store pci_addr of the device */
static int
rte_eth_dev_detach_pdev(uint8_t port_id, struct rte_pci_addr *addr)
{
struct rte_pci_addr freed_addr;
struct rte_pci_addr vp;
/* get pci address by port id */
if (rte_eth_dev_get_addr_by_port(port_id, &freed_addr))
goto err;
/* Zeroed pci addr means the port comes from virtual device */
vp.domain = vp.bus = vp.devid = vp.function = 0;
if (rte_eal_compare_pci_addr(&vp, &freed_addr) == 0)
goto err;
/* invoke remove func of the pci driver,
* also remove the device from pci_device_list */
if (rte_eal_pci_detach(&freed_addr))
goto err;
*addr = freed_addr;
return 0;
err:
return -1;
}
/* attach the new virtual device, then store port_id of the device */
static int
rte_eth_dev_attach_vdev(const char *vdevargs, uint8_t *port_id)
{
char *name = NULL, *args = NULL;
int ret = -1;
/* parse vdevargs, then retrieve device name and args */
if (rte_eal_parse_devargs_str(vdevargs, &name, &args))
goto end;
/* walk around dev_driver_list to find the driver of the device,
* then invoke probe function of the driver.
* rte_eal_vdev_init() updates port_id allocated after
* initialization.
*/
if (rte_eal_vdev_init(name, args))
goto end;
if (rte_eth_dev_get_port_by_name(name, port_id))
goto end;
ret = 0;
end:
free(name);
free(args);
return ret;
}
/* detach the new virtual device, then store the name of the device */
static int
rte_eth_dev_detach_vdev(uint8_t port_id, char *vdevname)
{
char name[RTE_ETH_NAME_MAX_LEN];
/* get device name by port id */
if (rte_eth_dev_get_name_by_port(port_id, name))
goto err;
/* walk around dev_driver_list to find the driver of the device,
* then invoke uninit function of the driver */
if (rte_eal_vdev_uninit(name))
goto err;
strncpy(vdevname, name, sizeof(name));
return 0;
err:
return -1;
}
/* attach the new device, then store port_id of the device */
int
rte_eth_dev_attach(const char *devargs, uint8_t *port_id)
{
struct rte_pci_addr addr;
int ret = -1;
int current = eth_dev_last_created_port;
char *name = NULL;
char *args = NULL;
if ((devargs == NULL) || (port_id == NULL)) {
ret = -EINVAL;
goto err;
}
if (eal_parse_pci_DomBDF(devargs, &addr) == 0) {
ret = rte_eth_dev_attach_pdev(&addr, port_id);
/* parse devargs, then retrieve device name and args */
if (rte_eal_parse_devargs_str(devargs, &name, &args))
goto err;
ret = rte_eal_dev_attach(name, args);
if (ret < 0)
goto err;
} else {
ret = rte_eth_dev_attach_vdev(devargs, port_id);
if (ret < 0)
/* no point looking at eth_dev_last_created_port if no port exists */
if (!nb_ports) {
RTE_LOG(ERR, EAL, "No ports found for device (%s)\n", name);
ret = -1;
goto err;
}
return 0;
/* if nothing happened, there is a bug here, since some driver told us
* it did attach a device, but did not create a port.
*/
if (current == eth_dev_last_created_port) {
ret = -1;
goto err;
}
*port_id = eth_dev_last_created_port;
ret = 0;
err:
RTE_LOG(ERR, EAL, "Driver, cannot attach the device\n");
free(name);
free(args);
return ret;
}
@ -589,7 +467,6 @@ err:
int
rte_eth_dev_detach(uint8_t port_id, char *name)
{
struct rte_pci_addr addr;
int ret = -1;
if (name == NULL) {
@ -597,33 +474,19 @@ rte_eth_dev_detach(uint8_t port_id, char *name)
goto err;
}
/* check whether the driver supports detach feature, or not */
/* FIXME: move this to eal, once device flags are relocated there */
if (rte_eth_dev_is_detachable(port_id))
goto err;
if (rte_eth_dev_get_device_type(port_id) == RTE_ETH_DEV_PCI) {
ret = rte_eth_dev_get_addr_by_port(port_id, &addr);
snprintf(name, sizeof(rte_eth_devices[port_id].data->name),
"%s", rte_eth_devices[port_id].data->name);
ret = rte_eal_dev_detach(name);
if (ret < 0)
goto err;
ret = rte_eth_dev_detach_pdev(port_id, &addr);
if (ret < 0)
goto err;
snprintf(name, RTE_ETH_NAME_MAX_LEN,
"%04x:%02x:%02x.%d",
addr.domain, addr.bus,
addr.devid, addr.function);
} else {
ret = rte_eth_dev_detach_vdev(port_id, name);
if (ret < 0)
goto err;
}
return 0;
err:
RTE_LOG(ERR, EAL, "Driver, cannot detach the device\n");
return ret;
}