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misc: mic: SCIF RMA nodeqp and minor miscellaneous changes

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This patch adds the SCIF kernel node QP control messages required to
enable SCIF RMAs. Examples of such node QP control messages include
registration, unregistration, remote memory allocation requests,
remote memory unmap and SCIF remote fence requests.

The patch also updates the SCIF driver with minor changes required to
enable SCIF RMAs by adding the new files to the build, initializing
RMA specific information during SCIF endpoint creation, reserving SCIF
DMA channels, initializing SCIF RMA specific global data structures,
adding the IOCTL hooks required for SCIF RMAs and updating RMA
specific debugfs hooks.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Nikhil Rao <nikhil.rao@intel.com>
Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sudeep Dutt
2015-09-29 18:16:25 -07:00
committed by Greg Kroah-Hartman
parent 564c8d8dfc
commit d18243293a
14 changed files with 516 additions and 40 deletions
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25
drivers/misc/mic/scif/scif_map.h
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@@ -80,7 +80,7 @@ scif_unmap_single(dma_addr_t local, struct scif_dev *scifdev,
size_t size)
{
if (!scifdev_self(scifdev)) {
if (scifdev_is_p2p(scifdev) && local > scifdev->base_addr)
if (scifdev_is_p2p(scifdev))
local = local - scifdev->base_addr;
dma_unmap_single(&scifdev->sdev->dev, local,
size, DMA_BIDIRECTIONAL);
@@ -110,4 +110,27 @@ scif_iounmap(void *virt, size_t len, struct scif_dev *scifdev)
sdev->hw_ops->iounmap(sdev, (void __force __iomem *)virt);
}
}
static __always_inline int
scif_map_page(dma_addr_t *dma_handle, struct page *page,
struct scif_dev *scifdev)
{
int err = 0;
if (scifdev_self(scifdev)) {
*dma_handle = page_to_phys(page);
} else {
struct scif_hw_dev *sdev = scifdev->sdev;
*dma_handle = dma_map_page(&sdev->dev,
page, 0x0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(&sdev->dev, *dma_handle))
err = -ENOMEM;
else if (scifdev_is_p2p(scifdev))
*dma_handle = *dma_handle + scifdev->base_addr;
}
if (err)
*dma_handle = 0;
return err;
}
#endif /* SCIF_MAP_H */