diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2020-10-27 20:34:35 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-10-30 11:40:36 +0300 |
| commit | 8e50d392652f20616a136165dff516b86baf5e49 (patch) | |
| tree | f2008bb6857698bb9d875d7ec3206dc3c5fbcd3a /drivers/dma/idxd/registers.h | |
| parent | 212a93ca435ec847bdfe238f225dd6e8b77927e9 (diff) | |
| download | linux-8e50d392652f20616a136165dff516b86baf5e49.tar.xz | |
dmaengine: idxd: Add shared workqueue support
Add shared workqueue support that includes the support of Shared Virtual
memory (SVM) or in similar terms On Demand Paging (ODP). The shared
workqueue uses the enqcmds command in kernel and will respond with retry if
the workqueue is full. Shared workqueue only works when there is PASID
support from the IOMMU.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Link: https://lore.kernel.org/r/160382007499.3911367.26043087963708134.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma/idxd/registers.h')
| -rw-r--r-- | drivers/dma/idxd/registers.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/dma/idxd/registers.h b/drivers/dma/idxd/registers.h index aef5a902829e..1041c2779f9b 100644 --- a/drivers/dma/idxd/registers.h +++ b/drivers/dma/idxd/registers.h @@ -336,6 +336,8 @@ union wqcfg { u32 bits[8]; } __packed; +#define WQCFG_PASID_IDX 2 + /* * This macro calculates the offset into the WQCFG register * idxd - struct idxd * |