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| author |   Thomas Gleixner <tglx@linutronix.de> | 2021-12-06 23:51:10 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-12-16 22:22:17 +0100 |
| commit | 602905253607ba892336f7bba8bb45b5be819d87 (patch) | |
| tree | b6339c6549c6b6da96d99fae229cadb2c7363e1a /include/linux/msi.h | |
| parent | genirq/msi: Provide a set of advanced MSI accessors and iterators (diff) | |
| download | linux-dev-602905253607ba892336f7bba8bb45b5be819d87.tar.xz linux-dev-602905253607ba892336f7bba8bb45b5be819d87.zip | |
genirq/msi: Provide msi_alloc_msi_desc() and a simple allocator
Provide msi_alloc_msi_desc() which takes a template MSI descriptor for
initializing a newly allocated descriptor. This allows to simplify various
usage sites of alloc_msi_entry() and moves the storage handling into the
core code.
For simple cases where only a linear vector space is required provide
msi_add_simple_msi_descs() which just allocates a linear range of MSI
descriptors and fills msi_desc::msi_index accordingly.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210747.873833567@linutronix.de
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 703221f7e9ea..bbb8c1e2c18b 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -247,6 +247,8 @@ static inline void pci_write_msi_msg(unsigned int irq, struct msi_msg *msg) } #endif /* CONFIG_PCI_MSI */ +int msi_add_msi_desc(struct device *dev, struct msi_desc *init_desc); + struct msi_desc *alloc_msi_entry(struct device *dev, int nvec, const struct irq_affinity_desc *affinity); void free_msi_entry(struct msi_desc *entry); |