On 03/25/2010 08:09 AM, Cam Macdonell wrote:
This patch adds a driver for my shared memory PCI device using the uio_pci interface. The driver has three memory regions. The first memory region is for device registers for sending interrupts. The second BAR is for receiving MSI-X interrupts and the third memory region maps the shared memory. The device only exports the first and third memory regions to userspace. This driver supports MSI-X and regular pin interrupts. Currently, the number of MSI vectors is set to 4 which could be increased, but the driver will work with fewer vectors. If MSI is not available, then regular interrupts will be used.
There is now a generic PCI 2.3 driver that can handle all PCI devices. It doesn't support MSI, but if we add MSI support then it can be used without the need for a specialized driver.
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