diff options
Diffstat (limited to 'target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch')
| -rw-r--r-- | target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch b/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch deleted file mode 100644 index 2e681cdffc..0000000000 --- a/target/linux/generic/pending-5.10/850-0012-PCI-aardvark-Enable-MSI-X-support.patch +++ /dev/null @@ -1,38 +0,0 @@ -From 735a4ac9782b96fbe1543c578aa8334364f21abd Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org> -Date: Fri, 2 Apr 2021 14:05:24 +0200 -Subject: [PATCH] PCI: aardvark: Enable MSI-X support -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -According to PCI 3.0 specification, sending both MSI and MSI-X interrupts -is done by DWORD memory write operation to doorbell message address. The -write operation for MSI has zero upper 16 bits and the MSI interrupt number -in the lower 16 bits, while the write operation for MSI-X contains a 32-bit -value from MSI-X table. - -Since the driver only uses interrupt numbers from range 0..31, the upper -16 bits of the DWORD memory write operation to doorbell message address -are zero even for MSI-X interrupts. Thus we can enable MSI-X interrupts. - -Testing proves that kernel can correctly receive MSI-X interrupts from PCIe -cards which supports both MSI and MSI-X interrupts. - -Signed-off-by: Pali Rohár <pali@kernel.org> -Signed-off-by: Marek Behún <kabel@kernel.org> ---- - drivers/pci/controller/pci-aardvark.c | 2 +- - 1 file changed, 1 insertion(+), 1 deletion(-) - ---- a/drivers/pci/controller/pci-aardvark.c -+++ b/drivers/pci/controller/pci-aardvark.c -@@ -1346,7 +1346,7 @@ static struct irq_chip advk_msi_irq_chip - - static struct msi_domain_info advk_msi_domain_info = { - .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | -- MSI_FLAG_MULTI_PCI_MSI, -+ MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX, - .chip = &advk_msi_irq_chip, - }; - |