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From: Christoph Hellwig <hch@lst.de>
To: jxgao@google.com, gregkh@linuxfoundation.org
Cc: saravanak@google.com, konrad.wilk@oracle.com, marcorr@google.com,
	linux-nvme@lists.infradead.org, kbusch@kernel.org,
	iommu@lists.linux-foundation.org, erdemaktas@google.com,
	robin.murphy@arm.com, m.szyprowski@samsung.com
Subject: [PATCH 9/9] nvme-pci: set min_align_mask
Date: Sun,  7 Feb 2021 17:03:27 +0100	[thread overview]
Message-ID: <20210207160327.2955490-10-hch@lst.de> (raw)
In-Reply-To: <20210207160327.2955490-1-hch@lst.de>

From: Jianxiong Gao <jxgao@google.com>

The PRP addressing scheme requires all PRP entries except for the
first one to have a zero offset into the NVMe controller pages (which
can be different from the Linux PAGE_SIZE).  Use the min_align_mask
device parameter to ensure that swiotlb does not change the address
of the buffer modulo the device page size to ensure that the PRPs
won't be malformed.

Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 81e6389b204205..83303e4e301924 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2629,6 +2629,7 @@ static void nvme_reset_work(struct work_struct *work)
 	 * Don't limit the IOMMU merged segment size.
 	 */
 	dma_set_max_seg_size(dev->dev, 0xffffffff);
+	dma_set_min_align_mask(dev->dev, NVME_CTRL_PAGE_SIZE - 1);
 
 	mutex_unlock(&dev->shutdown_lock);
 
-- 
2.29.2


_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: jxgao@google.com, gregkh@linuxfoundation.org
Cc: saravanak@google.com, konrad.wilk@oracle.com, marcorr@google.com,
	linux-nvme@lists.infradead.org, kbusch@kernel.org,
	iommu@lists.linux-foundation.org, robin.murphy@arm.com
Subject: [PATCH 9/9] nvme-pci: set min_align_mask
Date: Sun,  7 Feb 2021 17:03:27 +0100	[thread overview]
Message-ID: <20210207160327.2955490-10-hch@lst.de> (raw)
In-Reply-To: <20210207160327.2955490-1-hch@lst.de>

From: Jianxiong Gao <jxgao@google.com>

The PRP addressing scheme requires all PRP entries except for the
first one to have a zero offset into the NVMe controller pages (which
can be different from the Linux PAGE_SIZE).  Use the min_align_mask
device parameter to ensure that swiotlb does not change the address
of the buffer modulo the device page size to ensure that the PRPs
won't be malformed.

Signed-off-by: Jianxiong Gao <jxgao@google.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/pci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 81e6389b204205..83303e4e301924 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2629,6 +2629,7 @@ static void nvme_reset_work(struct work_struct *work)
 	 * Don't limit the IOMMU merged segment size.
 	 */
 	dma_set_max_seg_size(dev->dev, 0xffffffff);
+	dma_set_min_align_mask(dev->dev, NVME_CTRL_PAGE_SIZE - 1);
 
 	mutex_unlock(&dev->shutdown_lock);
 
-- 
2.29.2

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  parent reply	other threads:[~2021-02-07 16:04 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-07 16:03 preserve DMA offsets when using swiotlb v2 Christoph Hellwig
2021-02-07 16:03 ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 1/9] driver core: add a min_align_mask field to struct device_dma_parameters Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 2/9] swiotlb: add a IO_TLB_SIZE define Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 3/9] swiotlb: factor out an io_tlb_offset helper Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 4/9] swiotlb: factor out a nr_slots helper Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 5/9] swiotlb: clean up swiotlb_tbl_unmap_single Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 6/9] swiotlb: refactor swiotlb_tbl_map_single Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-22 19:05   ` Nicolas Saenz Julienne
2021-02-22 19:05     ` Nicolas Saenz Julienne
2021-02-22 19:29     ` Konrad Rzeszutek Wilk
2021-02-22 19:29       ` Konrad Rzeszutek Wilk
2021-02-23  7:25       ` Christoph Hellwig
2021-02-23  7:25         ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 7/9] swiotlb: don't modify orig_addr in swiotlb_tbl_sync_single Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` [PATCH 8/9] swiotlb: respect min_align_mask Christoph Hellwig
2021-02-07 16:03   ` Christoph Hellwig
2021-02-07 16:03 ` Christoph Hellwig [this message]
2021-02-07 16:03   ` [PATCH 9/9] nvme-pci: set min_align_mask Christoph Hellwig
2021-02-09  8:41 ` preserve DMA offsets when using swiotlb v2 Christoph Hellwig
2021-02-09  8:46   ` Greg KH
2021-02-09  8:46     ` Greg KH
2021-02-09 19:49   ` Jianxiong Gao
2021-02-09 19:49     ` Jianxiong Gao via iommu
2021-02-19 18:13     ` Konrad Rzeszutek Wilk
2021-02-19 18:13       ` Konrad Rzeszutek Wilk

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