lkml.org 
[lkml]   [2018]   [Aug]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/4] PCI/portdrv: Check platform supported service IRQ's
Date
Platforms may have dedicated IRQ lines for PCIe services like
AER/PME etc., check for such IRQ lines.
Check mask and fill legacy irq line for services other than
platform supported service IRQ number.

Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
---
drivers/pci/pcie/portdrv_core.c | 19 +++++++++++++++++--
1 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index e0261ad..a7d024c 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -166,6 +166,19 @@ static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
irqs[i] = -1;

/*
+ * Some platforms have dedicated interrupt line from root complex to
+ * interrupt controller for PCIe services like AER/PME etc., check
+ * if platform registered with any such IRQ.
+ */
+ if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT) {
+ int plat_mask;
+
+ plat_mask = pci_check_platform_service_irqs(dev, irqs, mask);
+ if (plat_mask > 0)
+ mask = mask & plat_mask;
+ }
+
+ /*
* If we support PME but can't use MSI/MSI-X for it, we have to
* fall back to INTx or other interrupts, e.g., a system shared
* interrupt.
@@ -183,8 +196,10 @@ static int pcie_init_service_irqs(struct pci_dev *dev, int *irqs, int mask)
if (ret < 0)
return -ENODEV;

- for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++)
- irqs[i] = pci_irq_vector(dev, 0);
+ for (i = 0; i < PCIE_PORT_DEVICE_MAXSERVICES; i++) {
+ if (mask & (1 << i))
+ irqs[i] = pci_irq_vector(dev, 0);
+ }

return 0;
}
--
1.7.1
\
 
 \ /
  Last update: 2018-08-10 17:45    [W:0.053 / U:1.460 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site