[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver |
Date: |
Thu, 25 Mar 2010 18:42:31 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Thu, Mar 25, 2010 at 10:24:20AM -0600, Cam Macdonell wrote:
> On Thu, Mar 25, 2010 at 3:46 AM, Avi Kivity <address@hidden> wrote:
> > 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.
>
> Agreed, I'd be happy to use the generic driver if MSI is there. What
> would MSI support for UIO look like? An array of "struct uio_irq" for
> the different vectors?
>
> Cam
My idea was to supply a way to bind eventfd to a vector.
> >
> > --
> > error compiling committee.c: too many arguments to function
> >
> >
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, (continued)
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Michael S. Tsirkin, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Michael S. Tsirkin, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/28
- Re: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Jamie Lokier, 2010/03/28
- Re: [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, malc, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/28
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Avi Kivity, 2010/03/29
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Cam Macdonell, 2010/03/30
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver, Michael S. Tsirkin, 2010/03/31
- [Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver,
Michael S. Tsirkin <=