diff options
| author | Gabriele Paoloni <gabriele.paoloni@huawei.com> | 2017-05-23 16:23:58 +0200 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-06-17 01:04:13 +0200 |
| commit | a1d5f18cafe6b81696e60ca4901709d2f807362c (patch) | |
| tree | 8f7cbc9c642cdd9fe11185d3429c74e9bfa1a416 /drivers/pci/pcie/portdrv.h | |
| parent | Linux 4.12-rc1 (diff) | |
| download | linux-a1d5f18cafe6b81696e60ca4901709d2f807362c.tar.xz linux-a1d5f18cafe6b81696e60ca4901709d2f807362c.zip | |
PCI/portdrv: Support multiple interrupts for MSI as well as MSI-X
Root Ports can generate several different interrupts using either MSI or
MSI-X, but we only support that for MSI-X. Ports that support MSI but not
MSI-X are currently limited to sharing a single interrupt.
Rename pcie_port_enable_msix() to pcie_port_enable_irq_vec() and extend it
to support multiple interrupts using either MSI-X (preferred) or MSI.
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@huawei.com>
[bhelgaas: changelog, reword comments, simplify PME/hotplug no-MSI logic]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/pci/pcie/portdrv.h')
| -rw-r--r-- | drivers/pci/pcie/portdrv.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h index 587aef36030d..4334fd5d7de9 100644 --- a/drivers/pci/pcie/portdrv.h +++ b/drivers/pci/pcie/portdrv.h @@ -13,10 +13,11 @@ #define PCIE_PORT_DEVICE_MAXSERVICES 5 /* - * According to the PCI Express Base Specification 2.0, the indices of - * the MSI-X table entries used by port services must not exceed 31 + * The PCIe Capability Interrupt Message Number (PCIe r3.1, sec 7.8.2) must + * be one of the first 32 MSI-X entries. Per PCI r3.0, sec 6.8.3.1, MSI + * supports a maximum of 32 vectors per function. */ -#define PCIE_PORT_MAX_MSIX_ENTRIES 32 +#define PCIE_PORT_MAX_MSI_ENTRIES 32 #define get_descriptor_id(type, service) (((type - 4) << 8) | service) |