From 1bb141ed5e14f773f9e08b80fe5db3fd405399db Mon Sep 17 00:00:00 2001 From: Diana Craciun Date: Mon, 5 Oct 2020 20:36:53 +0300 Subject: vfio/fsl-mc: Add read/write support for fsl-mc devices The software uses a memory-mapped I/O command interface (MC portals) to communicate with the MC hardware. This command interface is used to discover, enumerate, configure and remove DPAA2 objects. The DPAA2 objects use MSIs, so the command interface needs to be emulated such that the correct MSI is configured in the hardware (the guest has the virtual MSIs). This patch is adding read/write support for fsl-mc devices. The mc commands are emulated by the userspace. The host is just passing the correct command to the hardware. Also the current patch limits userspace to write complete 64byte command once and read 64byte response by one ioctl. Signed-off-by: Bharat Bhushan Signed-off-by: Diana Craciun Signed-off-by: Alex Williamson --- drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/vfio/fsl-mc/vfio_fsl_mc_private.h') diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h index 7aa49b9ba60d..a97ee691ed47 100644 --- a/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h +++ b/drivers/vfio/fsl-mc/vfio_fsl_mc_private.h @@ -32,6 +32,7 @@ struct vfio_fsl_mc_region { u32 type; u64 addr; resource_size_t size; + void __iomem *ioaddr; }; struct vfio_fsl_mc_device { -- cgit v1.2.3