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cxl/pci: Introduce cxl_request_irq()

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Factor out common functionality/semantics for cxl shared interrupts
into a new helper on top of devm_request_irq().

Suggested-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://lore.kernel.org/r/20230523170927.20685-4-dave@stgolabs.net
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Davidlohr Bueso 2023-05-23 10:09:26 -07:00 committed by Dan Williams
parent f279d0bc13
commit 9f7a320d16
1 changed files with 23 additions and 16 deletions
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39
drivers/cxl/pci.c
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@ -84,6 +84,27 @@ static int cxl_pci_mbox_wait_for_doorbell(struct cxl_dev_state *cxlds)
status & CXLMDEV_DEV_FATAL ? " fatal" : "", \
status & CXLMDEV_FW_HALT ? " firmware-halt" : "")
struct cxl_dev_id {
struct cxl_dev_state *cxlds;
};
static int cxl_request_irq(struct cxl_dev_state *cxlds, int irq,
irq_handler_t handler, irq_handler_t thread_fn)
{
struct device *dev = cxlds->dev;
struct cxl_dev_id *dev_id;
/* dev_id must be globally unique and must contain the cxlds */
dev_id = devm_kzalloc(dev, sizeof(*dev_id), GFP_KERNEL);
if (!dev_id)
return -ENOMEM;
dev_id->cxlds = cxlds;
return devm_request_threaded_irq(dev, irq, handler, thread_fn,
IRQF_SHARED | IRQF_ONESHOT,
NULL, dev_id);
}
/**
* __cxl_pci_mbox_send_cmd() - Execute a mailbox command
* @cxlds: The device state to communicate with.
@ -469,10 +490,6 @@ static int cxl_alloc_irq_vectors(struct pci_dev *pdev)
return 0;
}
struct cxl_dev_id {
struct cxl_dev_state *cxlds;
};
static irqreturn_t cxl_event_thread(int irq, void *id)
{
struct cxl_dev_id *dev_id = id;
@ -498,28 +515,18 @@ static irqreturn_t cxl_event_thread(int irq, void *id)
static int cxl_event_req_irq(struct cxl_dev_state *cxlds, u8 setting)
{
struct device *dev = cxlds->dev;
struct pci_dev *pdev = to_pci_dev(dev);
struct cxl_dev_id *dev_id;
struct pci_dev *pdev = to_pci_dev(cxlds->dev);
int irq;
if (FIELD_GET(CXLDEV_EVENT_INT_MODE_MASK, setting) != CXL_INT_MSI_MSIX)
return -ENXIO;
/* dev_id must be globally unique and must contain the cxlds */
dev_id = devm_kzalloc(dev, sizeof(*dev_id), GFP_KERNEL);
if (!dev_id)
return -ENOMEM;
dev_id->cxlds = cxlds;
irq = pci_irq_vector(pdev,
FIELD_GET(CXLDEV_EVENT_INT_MSGNUM_MASK, setting));
if (irq < 0)
return irq;
return devm_request_threaded_irq(dev, irq, NULL, cxl_event_thread,
IRQF_SHARED | IRQF_ONESHOT, NULL,
dev_id);
return cxl_request_irq(cxlds, irq, NULL, cxl_event_thread);
}
static int cxl_event_get_int_policy(struct cxl_dev_state *cxlds,