From: Ahmed S. Darwish <da...@linutronix.de>
To distangle the maze in msi.c all exported device-driver MSI APIs are now
to be grouped in one file, api.c.
Move pci_enable_msi() and make its kernel-doc comprehensive.
Signed-off-by: Ahmed S. Darwish <da...@linutronix.de>
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
---
drivers/pci/msi/api.c | 23 +++++++++++++++++++++++
drivers/pci/msi/msi.c | 14 ++------------
drivers/pci/msi/msi.h | 1 +
3 files changed, 26 insertions(+), 12 deletions(-)
---
diff --git a/drivers/pci/msi/api.c b/drivers/pci/msi/api.c
index 7485942cbe5d..63d7f8f6a284 100644
--- a/drivers/pci/msi/api.c
+++ b/drivers/pci/msi/api.c
@@ -13,6 +13,29 @@
#include "msi.h"
/**
+ * pci_enable_msi() - Enable MSI interrupt mode on device
+ * @dev: the PCI device to operate on
+ *
+ * Legacy device driver API to enable MSI interrupts mode on device and
+ * allocate a single interrupt vector. On success, the allocated vector
+ * Linux IRQ will be saved at @dev->irq. The driver must invoke
+ * pci_disable_msi() on cleanup.
+ *
+ * NOTE: The newer pci_alloc_irq_vectors() / pci_free_irq_vectors() API
+ * pair should, in general, be used instead.
+ *
+ * Return: 0 on success, errno otherwise
+ */
+int pci_enable_msi(struct pci_dev *dev)
+{
+ int rc = __pci_enable_msi_range(dev, 1, 1, NULL);
+ if (rc < 0)
+ return rc;
+ return 0;
+}
+EXPORT_SYMBOL(pci_enable_msi);
+
+/**
* pci_disable_msi() - Disable MSI interrupt mode on device
* @dev: the PCI device to operate on
*
diff --git a/drivers/pci/msi/msi.c b/drivers/pci/msi/msi.c
index 4a1300b74518..98f07ad9af62 100644
--- a/drivers/pci/msi/msi.c
+++ b/drivers/pci/msi/msi.c
@@ -790,8 +790,8 @@ void pci_disable_msix(struct pci_dev *dev)
}
EXPORT_SYMBOL(pci_disable_msix);
-static int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
- struct irq_affinity *affd)
+int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
+ struct irq_affinity *affd)
{
int nvec;
int rc;
@@ -844,16 +844,6 @@ static int __pci_enable_msi_range(struct pci_dev *dev, int
minvec, int maxvec,
}
}
-/* deprecated, don't use */
-int pci_enable_msi(struct pci_dev *dev)
-{
- int rc = __pci_enable_msi_range(dev, 1, 1, NULL);
- if (rc < 0)
- return rc;
- return 0;
-}
-EXPORT_SYMBOL(pci_enable_msi);
-
static int __pci_enable_msix_range(struct pci_dev *dev,
struct msix_entry *entries, int minvec,
int maxvec, struct irq_affinity *affd,
diff --git a/drivers/pci/msi/msi.h b/drivers/pci/msi/msi.h
index 634879277349..00bb98d5bb0e 100644
--- a/drivers/pci/msi/msi.h
+++ b/drivers/pci/msi/msi.h
@@ -87,6 +87,7 @@ static inline __attribute_const__ u32 msi_multi_mask(struct
msi_desc *desc)
/* MSI internal functions invoked from the public APIs */
void pci_msi_shutdown(struct pci_dev *dev);
void pci_free_msi_irqs(struct pci_dev *dev);
+int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec, struct
irq_affinity *affd);
/* Legacy (!IRQDOMAIN) fallbacks */
#ifdef CONFIG_PCI_MSI_ARCH_FALLBACKS
