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cndm: Assign instance ID

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-12-31 23:36:19 -08:00
parent 8ad1842b90
commit 96e24756de
2 changed files with 29 additions and 0 deletions
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3
src/cndm/modules/cndm/cndm.h
View File

@@ -25,6 +25,9 @@ struct cndm_dev {
struct pci_dev *pdev;
struct device *dev;
unsigned int id;
char name[16];
struct net_device *ndev[32];
void __iomem *bar;

26
src/cndm/modules/cndm/cndm_main.c
View File

@@ -18,6 +18,25 @@ MODULE_AUTHOR("FPGA Ninja");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);
static DEFINE_IDA(cndm_instance_ida);
static int cndm_assign_id(struct cndm_dev *cdev)
{
int ret = ida_alloc(&cndm_instance_ida, GFP_KERNEL);
if (ret < 0)
return ret;
cdev->id = ret;
snprintf(cdev->name, sizeof(cdev->name), DRIVER_NAME "%d", cdev->id);
return 0;
}
static void cndm_free_id(struct cndm_dev *cdev)
{
ida_free(&cndm_instance_ida, cdev->id);
}
static int cndm_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct device *dev = &pdev->dev;
@@ -43,6 +62,10 @@ static int cndm_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
cdev->dev = dev;
pci_set_drvdata(pdev, cdev);
ret = cndm_assign_id(cdev);
if (ret)
goto fail_assign_id;
ret = pci_enable_device_mem(pdev);
if (ret) {
dev_err(dev, "Failed to enable device");
@@ -132,6 +155,8 @@ fail_regions:
pci_clear_master(pdev);
pci_disable_device(pdev);
fail_enable_device:
cndm_free_id(cdev);
fail_assign_id:
cndm_devlink_free(devlink);
return ret;
}
@@ -159,6 +184,7 @@ static void cndm_pci_remove(struct pci_dev *pdev)
pci_release_regions(pdev);
pci_clear_master(pdev);
pci_disable_device(pdev);
cndm_free_id(cdev);
cndm_devlink_free(devlink);
}