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ethdev: allow iterating with pure class filter

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If no rte_device is given in the iterator,
eth_dev_match() is looking at all ports without any restriction,
except the ethdev kvargs filter.

It allows to iterate with a devargs filter referencing only
some ethdev parameters. The format (from the new devargs syntax) is:
	class=eth,paramY=Y

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Thomas Monjalon 2018-10-23 10:28:38 +02:00 committed by Ferruh Yigit
parent 214ed1acd1
commit 8b9ea3b3ca
2 changed files with 23 additions and 4 deletions
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2
lib/librte_ethdev/rte_class_eth.c
View File

@ -42,7 +42,7 @@ eth_dev_match(const struct rte_eth_dev *edev,
if (edev->state == RTE_ETH_DEV_UNUSED)
return -1;
if (edev->device != arg->device)
if (arg->device != NULL && arg->device != edev->device)
return -1;
if (kvlist == NULL)
/* Empty string matches everything. */

25
lib/librte_ethdev/rte_ethdev.c
View File

@ -203,10 +203,24 @@ rte_eth_iterator_init(struct rte_dev_iterator *iter, const char *devargs_str)
* The devargs string may use various syntaxes:
* - 0000:08:00.0,representor=[1-3]
* - pci:0000:06:00.0,representor=[0,5]
* - class=eth,mac=00:11:22:33:44:55
* A new syntax is in development (not yet supported):
* - bus=X,paramX=x/class=Y,paramY=y/driver=Z,paramZ=z
*/
/*
* Handle pure class filter (i.e. without any bus-level argument),
* from future new syntax.
* rte_devargs_parse() is not yet supporting the new syntax,
* that's why this simple case is temporarily parsed here.
*/
#define iter_anybus_str "class=eth,"
if (strncmp(devargs_str, iter_anybus_str,
strlen(iter_anybus_str)) == 0) {
iter->cls_str = devargs_str + strlen(iter_anybus_str);
goto end;
}
/* Split bus, device and parameters. */
ret = rte_devargs_parse(&devargs, devargs_str);
if (ret != 0)
@ -260,6 +274,7 @@ rte_eth_iterator_init(struct rte_dev_iterator *iter, const char *devargs_str)
}
iter->bus_str = bus_str;
end:
iter->cls = rte_class_find_by_name("eth");
return 0;
@ -280,8 +295,10 @@ rte_eth_iterator_next(struct rte_dev_iterator *iter)
return RTE_MAX_ETHPORTS;
do { /* loop to try all matching rte_device */
/* If not in middle of rte_eth_dev iteration, */
if (iter->class_device == NULL) {
/* If not pure ethdev filter and */
if (iter->bus != NULL &&
/* not in middle of rte_eth_dev iteration, */
iter->class_device == NULL) {
/* get next rte_device to try. */
iter->device = iter->bus->dev_iterate(
iter->device, iter->bus_str, iter);
@ -293,7 +310,7 @@ rte_eth_iterator_next(struct rte_dev_iterator *iter)
iter->class_device, iter->cls_str, iter);
if (iter->class_device != NULL)
return eth_dev_to_id(iter->class_device); /* match */
} while (1); /* need to try next rte_device */
} while (iter->bus != NULL); /* need to try next rte_device */
/* No more ethdev port to iterate. */
rte_eth_iterator_cleanup(iter);
@ -303,6 +320,8 @@ rte_eth_iterator_next(struct rte_dev_iterator *iter)
void __rte_experimental
rte_eth_iterator_cleanup(struct rte_dev_iterator *iter)
{
if (iter->bus_str == NULL)
return; /* nothing to free in pure class filter */
free(RTE_CAST_FIELD(iter, bus_str, char *)); /* workaround const */
free(RTE_CAST_FIELD(iter, cls_str, char *)); /* workaround const */
memset(iter, 0, sizeof(*iter));