From: Dave Jiang <dave.jiang@intel.com>
To: vinod.koul@intel.com, dan.j.williams@intel.com
Cc: dmaengine@vger.kernel.org, hch@infradead.org, linux-nvdimm@lists.01.org
Subject: [PATCH v6 1/8] dmaengine: ioatdma: revert 7618d035 to allow sharing of DMA channels
Date: Fri, 25 Aug 2017 13:59:30 -0700 [thread overview]
Message-ID: <150369477016.6962.8636764604054663107.stgit@djiang5-desk3.ch.intel.com> (raw)
In-Reply-To: <150369446130.6962.4195769527575520889.stgit@djiang5-desk3.ch.intel.com>
Commit 7618d0359c16 ("dmaengine: ioatdma: Set non RAID channels to be
private capable") makes all non-RAID ioatdma channels as private to be
requestable by dma_request_channel(). With PQ CAP support going away for
ioatdma, this would make all channels private. To support the usage of
ioatdma for blk-mq implementation of pmem we need as many channels we can
share in order to be high performing. Thus reverting the patch.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
drivers/dma/ioat/init.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c
index ed8ed11..1b881fb 100644
--- a/drivers/dma/ioat/init.c
+++ b/drivers/dma/ioat/init.c
@@ -1153,9 +1153,6 @@ static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
}
}
- if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ)))
- dma_cap_set(DMA_PRIVATE, dma->cap_mask);
-
err = ioat_probe(ioat_dma);
if (err)
return err;
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next prev parent reply other threads:[~2017-08-25 20:56 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-25 20:59 [PATCH v6 0/8] libnvdimm: add DMA supported blk-mq pmem driver Dave Jiang
2017-08-25 20:59 ` Dave Jiang [this message]
2017-08-25 20:59 ` [PATCH v6 2/8] dmaengine: Add DMA_MEMCPY_SG transaction op Dave Jiang
2017-08-30 18:18 ` [v6,2/8] " Robin Murphy
2017-08-30 18:25 ` Dave Jiang
2017-08-31 10:57 ` Robin Murphy
2017-11-13 8:28 ` Stefan Roese
2017-11-15 15:52 ` Vinod Koul
2017-11-15 16:13 ` Stefan Roese
2017-11-15 16:37 ` Dave Jiang
2017-08-25 20:59 ` [PATCH v6 3/8] dmaengine: add verification of DMA_MEMSET_SG in dmaengine Dave Jiang
2017-08-25 20:59 ` [PATCH v6 4/8] dmaengine: ioatdma: dma_prep_memcpy_sg support Dave Jiang
2017-08-25 20:59 ` [PATCH v6 5/8] dmaengine: add function to provide per descriptor xfercap for dma engine Dave Jiang
2017-08-25 20:59 ` [PATCH v6 6/8] dmaengine: add SG support to dmaengine_unmap Dave Jiang
2017-08-25 21:00 ` [PATCH v6 7/8] dmaengine: provide number of available channels Dave Jiang
2017-08-25 21:00 ` [PATCH v6 8/8] libnvdimm: Add blk-mq pmem driver Dave Jiang
2017-08-25 23:08 ` Dan Williams
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