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| author | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-02 18:55:15 +0200 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2013-08-06 18:55:24 +0200 |
| commit | 90d9dd66957a744831146dbb1a9e4f96a9106100 (patch) | |
| tree | 6a6755c47ff49390891ce3fcf624d37547007671 /arch/tile/gxio | |
| parent | tile: support LSI MEGARAID SAS HBA hybrid dma_ops (diff) | |
| download | linux-90d9dd66957a744831146dbb1a9e4f96a9106100.tar.xz linux-90d9dd66957a744831146dbb1a9e4f96a9106100.zip | |
tile PCI RC: support more MSI-X interrupt vectors
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>
Diffstat (limited to 'arch/tile/gxio')
| -rw-r--r-- | arch/tile/gxio/iorpc_trio.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/tile/gxio/iorpc_trio.c b/arch/tile/gxio/iorpc_trio.c index cef4b2209cda..da6e18e049c3 100644 --- a/arch/tile/gxio/iorpc_trio.c +++ b/arch/tile/gxio/iorpc_trio.c @@ -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; |