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dmaengine: idxd: add 'struct idxd_dev' as wrapper for conf_dev

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Add a 'struct idxd_dev' that wraps the 'struct device' for idxd conf_dev
that registers with the dsa bus. This is introduced in order to deal with
multiple different types of 'devices' that are registered on the dsa_bus
when the compat driver needs to route them to the correct driver to attach.
The bind() call now can determine the type of device and then do the
appropriate driver matching.

Reviewed-by Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162637460065.744545.584492831446090984.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang
2021-07-15 11:43:20 -07:00
committed by Vinod Koul
parent da5a11d75d
commit 700af3a0a2
6 changed files with 251 additions and 185 deletions
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11
drivers/dma/idxd/cdev.c
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@@ -41,7 +41,7 @@ struct idxd_user_context {
static void idxd_cdev_dev_release(struct device *dev)
{
struct idxd_cdev *idxd_cdev = container_of(dev, struct idxd_cdev, dev);
struct idxd_cdev *idxd_cdev = dev_to_cdev(dev);
struct idxd_cdev_context *cdev_ctx;
struct idxd_wq *wq = idxd_cdev->wq;
@@ -256,9 +256,10 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
if (!idxd_cdev)
return -ENOMEM;
idxd_cdev->idxd_dev.type = IDXD_DEV_CDEV;
idxd_cdev->wq = wq;
cdev = &idxd_cdev->cdev;
dev = &idxd_cdev->dev;
dev = cdev_dev(idxd_cdev);
cdev_ctx = &ictx[wq->idxd->data->type];
minor = ida_simple_get(&cdev_ctx->minor_ida, 0, MINORMASK, GFP_KERNEL);
if (minor < 0) {
@@ -268,7 +269,7 @@ int idxd_wq_add_cdev(struct idxd_wq *wq)
idxd_cdev->minor = minor;
device_initialize(dev);
dev->parent = &wq->conf_dev;
dev->parent = wq_confdev(wq);
dev->bus = &dsa_bus_type;
dev->type = &idxd_cdev_device_type;
dev->devt = MKDEV(MAJOR(cdev_ctx->devt), minor);
@@ -299,8 +300,8 @@ void idxd_wq_del_cdev(struct idxd_wq *wq)
idxd_cdev = wq->idxd_cdev;
wq->idxd_cdev = NULL;
cdev_device_del(&idxd_cdev->cdev, &idxd_cdev->dev);
put_device(&idxd_cdev->dev);
cdev_device_del(&idxd_cdev->cdev, cdev_dev(idxd_cdev));
put_device(cdev_dev(idxd_cdev));
}
int idxd_cdev_register(void)