diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2020-10-27 18:34:35 +0100 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-10-30 09:40:36 +0100 |
| commit | 8e50d392652f20616a136165dff516b86baf5e49 (patch) | |
| tree | f2008bb6857698bb9d875d7ec3206dc3c5fbcd3a /drivers/dma/idxd/dma.c | |
| parent | dmaengine: ppc4xx: remove xor_hw_desc assignment without reading (diff) | |
| download | linux-8e50d392652f20616a136165dff516b86baf5e49.tar.xz linux-8e50d392652f20616a136165dff516b86baf5e49.zip | |
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/dma.c')
| -rw-r--r-- | drivers/dma/idxd/dma.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/drivers/dma/idxd/dma.c b/drivers/dma/idxd/dma.c index 0c892cbd72e0..8ed2773d8285 100644 --- a/drivers/dma/idxd/dma.c +++ b/drivers/dma/idxd/dma.c @@ -61,8 +61,6 @@ static inline void idxd_prep_desc_common(struct idxd_wq *wq, u64 addr_f1, u64 addr_f2, u64 len, u64 compl, u32 flags) { - struct idxd_device *idxd = wq->idxd; - hw->flags = flags; hw->opcode = opcode; hw->src_addr = addr_f1; @@ -70,13 +68,6 @@ static inline void idxd_prep_desc_common(struct idxd_wq *wq, hw->xfer_size = len; hw->priv = !!(wq->type == IDXD_WQT_KERNEL); hw->completion_addr = compl; - - /* - * Descriptor completion vectors are 1-8 for MSIX. We will round - * robin through the 8 vectors. - */ - wq->vec_ptr = (wq->vec_ptr % idxd->num_wq_irqs) + 1; - hw->int_handle = wq->vec_ptr; } static struct dma_async_tx_descriptor * |