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https://stackoverflow.com/questions/12938727/msi-and-msi-x-vectors-support
MSI and MSI-X vectors support. Ask Question Asked 7 years, 1 month ago. Active 7 years, 1 month ago. Viewed 2k times 1. Where exactly can I find in the Linux kernel code the limit set for MSI and MSI-X supporting 32 vectors and 2048 vectors respectively ? linux-kernel interrupt. share improve this question. asked Oct ...
https://www.kernel.org/doc/html/latest/PCI/msi-howto.html
If a device supports both MSI-X and MSI capabilities, this API will use the MSI-X facilities in preference to the MSI facilities. MSI-X supports any number of interrupts between 1 and 2048. In contrast, MSI is restricted to a maximum of 32 interrupts (and must be a power of two).
https://www.mjmwired.net/kernel/Documentation/MSI-HOWTO.txt
The implementation of MSI support requires the PCI 237 subsystem, not a device driver, to maintain full control of the MSI-X 238 table/MSI-X PBA (Pending Bit Array) and MMIO address space of the MSI-X 239 table/MSI-X PBA. A device driver is prohibited from requesting the MMIO 240 address space of the MSI-X table/MSI-X PBA.
http://www.alexonlinux.com/msi-x-the-right-way-to-spread-interrupt-load
In reality, plain MSI does not support this, but MSI-X does. Modern high-end network cards that support MSI-X, implement multiple tx-rx queues. Each queue tied up to an interrupt vector and each NIC has plenty of them. I checked Intel’s 82575 chipset.
http://linux-kernel.2935.n7.nabble.com/Support-for-multiple-MSI-td429088.html
Support for multiple MSI Currently, Linux supports multiple MSI-X interrupts per device, but only a single MSI interrupt. This patch series adds support to the generic PCI code for supporting multiple MSI …
https://forum-en.msi.com/index.php?topic=268760.0
Hello all, I am thinking about buying a new laptop, more precisely a MSI GS40. I like the combination of size and power. The primary use of this size and power will not be gaming, though, but working, in particular using Linux.
https://en.wikipedia.org/wiki/Message_Signaled_Interrupts
Linux gained support for MSI and MSI-X around 2003. Linux kernel versions before 2.6.20 are known to have serious bugs and limitations in their implementation of MSI/MSI-X. Haiku gained support for MSI around 2010. MSI-X support was added later, in 2013.
https://stackoverflow.com/questions/32845380/failed-to-enable-msi-x-interrupt-in-linux-system
I am working on PCIe based Cyclone V FPGA board in Linux Platform. I have tried with legacy interrupt which works fine in my PCIe Driver. Now, I want to enable MSI-X interrupt in my PCIe driver. MSI-X interrupt is implemented in FPGA system and I am getting …
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