From: Wesley Sheng <wesley.sheng@microchip.com>
To: <kurt.schwemmer@microsemi.com>, <logang@deltatee.com>,
<bhelgaas@google.com>, <linux-pci@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: <wesleyshenggit@sina.com>, <wesley.sheng@microchip.com>
Subject: [PATCH 2/5] switchtec: Set DMA coherent mask in Switchtec driver
Date: Thu, 15 Nov 2018 17:44:01 +0800 [thread overview]
Message-ID: <1542275044-10970-3-git-send-email-wesley.sheng@microchip.com> (raw)
In-Reply-To: <1542275044-10970-1-git-send-email-wesley.sheng@microchip.com>
From: Boris Glimcher <Boris.Glimcher@emc.com>
Switchtec hardware supports 64-bit DMA, set the correct DMA mask.
This allows the CMA to allocate larger buffers for memory windows.
Signed-off-by: Boris Glimcher <Boris.Glimcher@emc.com>
Signed-off-by: Wesley Sheng <wesley.sheng@microchip.com>
---
drivers/pci/switch/switchtec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index d2bca2d..480107e 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -1237,6 +1237,10 @@ static int switchtec_init_pci(struct switchtec_dev *stdev,
if (rc)
return rc;
+ rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
+ if (rc)
+ return rc;
+
pci_set_master(pdev);
stdev->mmio = pcim_iomap_table(pdev)[0];
--
2.7.4
next prev parent reply other threads:[~2018-11-15 3:16 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-15 9:43 [PATCH 0/5] Switchtec MRPC DMA mode support Wesley Sheng
2018-11-15 6:03 ` Logan Gunthorpe
2018-11-15 9:44 ` [PATCH 1/5] switchtec: Remove immediate status check after submit a MRPC command Wesley Sheng
2018-11-15 9:44 ` Wesley Sheng [this message]
2018-11-15 9:44 ` [PATCH 3/5] switchtec: A temporary variable should be used for the flags of switchtec_ioctl_event_ctl Wesley Sheng
2018-11-15 9:44 ` [PATCH 4/5] switchtec: Improve MRPC efficiency by leveraging write combining Wesley Sheng
2018-11-15 9:44 ` [PATCH 5/5] switchtec: MRPC DMA mode implementation Wesley Sheng
2018-12-10 9:12 [PATCH 0/5] Switchtec MRPC DMA mode support Wesley Sheng
2018-12-10 9:12 ` [PATCH 2/5] switchtec: Set DMA coherent mask in Switchtec driver Wesley Sheng
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