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| author |   Mika Westerberg <mika.westerberg@linux.intel.com> | 2017-06-06 15:24:57 +0300 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-06-09 11:42:41 +0200 |
| commit | 046bee1f9ab83b4549c185804ae9cbfbb8f9641f (patch) | |
| tree | 7bc81ed524fdcca2d146e8aa0a14d189b3469f33 /drivers/thunderbolt/nhi_regs.h | |
| parent | thunderbolt: Do not warn about newer DROM versions (diff) | |
| download | linux-dev-046bee1f9ab83b4549c185804ae9cbfbb8f9641f.tar.xz linux-dev-046bee1f9ab83b4549c185804ae9cbfbb8f9641f.zip | |
thunderbolt: Add MSI-X support
Intel Thunderbolt controllers support up to 16 MSI-X vectors. Using
MSI-X is preferred over MSI or legacy interrupt and may bring additional
performance because there is no need to check the status registers which
interrupt was triggered.
While there we convert comments in structs tb_ring and tb_nhi to follow
kernel-doc format more closely.
This code is based on the work done by Amir Levy and Michael Jamet.
Signed-off-by: Michael Jamet <michael.jamet@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Yehezkel Bernat <yehezkel.bernat@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/thunderbolt/nhi_regs.h')
| -rw-r--r-- | drivers/thunderbolt/nhi_regs.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/thunderbolt/nhi_regs.h b/drivers/thunderbolt/nhi_regs.h index 75cf0691e6c5..48b98d3c7e6a 100644 --- a/drivers/thunderbolt/nhi_regs.h +++ b/drivers/thunderbolt/nhi_regs.h @@ -95,7 +95,16 @@ struct ring_desc { #define REG_RING_INTERRUPT_BASE 0x38200 #define RING_INTERRUPT_REG_COUNT(nhi) ((31 + 2 * nhi->hop_count) / 32) +/* Interrupt Vector Allocation */ +#define REG_INT_VEC_ALLOC_BASE 0x38c40 +#define REG_INT_VEC_ALLOC_BITS 4 +#define REG_INT_VEC_ALLOC_MASK GENMASK(3, 0) +#define REG_INT_VEC_ALLOC_REGS (32 / REG_INT_VEC_ALLOC_BITS) + /* The last 11 bits contain the number of hops supported by the NHI port. */ #define REG_HOP_COUNT 0x39640 +#define REG_DMA_MISC 0x39864 +#define REG_DMA_MISC_INT_AUTO_CLEAR BIT(2) + #endif |