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dmaengine: idxd: add type to driver in order to allow device matching 

Add an array of support device types to the idxd_device_driver
definition in order to enable simple matching of device type to a
given driver. The deprecated / omnibus dsa_drv driver specifies
IDXD_DEV_NONE as its only role is to service legacy userspace (old
accel-config) directed bind requests and route them to them the proper
driver. It need not attach to a device when the bus is autoprobed. The
accel-config tooling is being updated to drop its dependency on this
deprecated bind scheme.

Reviewed-by: Dan Willliams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162637465882.744545.17456174666211577867.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2021-07-15 11:44:18 -07:00 committed by Vinod Koul
parent c05257b560
commit 5fee6567ec
3 changed files with 21 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/dma/idxd/idxd.h
View File

@ -51,6 +51,7 @@ enum idxd_type {
struct idxd_device_driver {
const char *name;
enum idxd_dev_type *type;
int (*probe)(struct idxd_dev *idxd_dev);
void (*remove)(struct idxd_dev *idxd_dev);
struct device_driver drv;

5
drivers/dma/idxd/init.c
View File

@ -879,6 +879,11 @@ int __idxd_driver_register(struct idxd_device_driver *idxd_drv, struct module *o
{
struct device_driver *drv = &idxd_drv->drv;
if (!idxd_drv->type) {
pr_debug("driver type not set (%ps)\n", __builtin_return_address(0));
return -EINVAL;
}
drv->name = idxd_drv->name;
drv->bus = &dsa_bus_type;
drv->owner = owner;

16
drivers/dma/idxd/sysfs.c
View File

@ -19,9 +19,18 @@ static char *idxd_wq_type_names[] = {
static int idxd_config_bus_match(struct device *dev,
struct device_driver *drv)
{
struct idxd_device_driver *idxd_drv =
container_of(drv, struct idxd_device_driver, drv);
struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev);
int i = 0;
return (is_idxd_dev(idxd_dev) || is_idxd_wq_dev(idxd_dev));
while (idxd_drv->type[i] != IDXD_DEV_NONE) {
if (idxd_dev->type == idxd_drv->type[i])
return 1;
i++;
}
return 0;
}
static int idxd_config_bus_probe(struct device *dev)
@ -79,10 +88,15 @@ static void idxd_dsa_drv_remove(struct idxd_dev *idxd_dev)
}
}
static enum idxd_dev_type dev_types[] = {
IDXD_DEV_NONE,
};
struct idxd_device_driver dsa_drv = {
.name = "dsa",
.probe = idxd_dsa_drv_probe,
.remove = idxd_dsa_drv_remove,
.type = dev_types,
};
/* IDXD engine attributes */