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tile PCI RC: support more MSI-X interrupt vectors

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To support PCIe devices with higher number of MSI-X interrupt vectors,
e.g. 16 for the LSI RAID card, enhance the Gx RC stack to provide more
MSI-X vectors by using the TRIO Scatter Queues, which provide 8 more
vectors in addition to ~10 from the Map Mem regions.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Chris Metcalf
2013-08-02 12:55:15 -04:00
parent 803c874abe
commit 90d9dd6695
4 changed files with 106 additions and 20 deletions
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23
arch/tile/gxio/iorpc_trio.c
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@@ -61,6 +61,29 @@ int gxio_trio_alloc_memory_maps(gxio_trio_context_t * context,
EXPORT_SYMBOL(gxio_trio_alloc_memory_maps);
struct alloc_scatter_queues_param {
unsigned int count;
unsigned int first;
unsigned int flags;
};
int gxio_trio_alloc_scatter_queues(gxio_trio_context_t * context,
unsigned int count, unsigned int first,
unsigned int flags)
{
struct alloc_scatter_queues_param temp;
struct alloc_scatter_queues_param *params = &temp;
params->count = count;
params->first = first;
params->flags = flags;
return hv_dev_pwrite(context->fd, 0, (HV_VirtAddr) params,
sizeof(*params),
GXIO_TRIO_OP_ALLOC_SCATTER_QUEUES);
}
EXPORT_SYMBOL(gxio_trio_alloc_scatter_queues);
struct alloc_pio_regions_param {
unsigned int count;