From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
To: Jonathan Lemon <jlemon@flugsvamp.com>
Cc: Ioana Ciocoi Radulescu <ruxandra.radulescu@nxp.com>,
"davem@davemloft.net" <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Madalin Bucur <madalin.bucur@nxp.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Leo Li <leoyang.li@nxp.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
Ioana Ciornei <ioana.ciornei@nxp.com>,
"robin.murphy@arm.com" <robin.murphy@arm.com>,
"hch@lst.de" <hch@lst.de>
Subject: Re: [PATCH v2 3/3] dpaa2_eth: use new unmap and sync dma api variants
Date: Mon, 28 Oct 2019 10:55:05 +0000 [thread overview]
Message-ID: <00a138f0-3651-5441-7241-5f02956b6c2c@nxp.com> (raw)
In-Reply-To: <BC2F1623-D8A5-4A6E-BAF4-5C551637E472@flugsvamp.com>
Hi Jonathan,
On 25.10.2019 19:12, Jonathan Lemon wrote:
>
>
> On 24 Oct 2019, at 5:41, Laurentiu Tudor wrote:
>
>> From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
>>
>> Convert this driver to usage of the newly introduced dma unmap and
>> sync DMA APIs. This will get rid of the unsupported direct usage of
>> iommu_iova_to_phys() API.
>>
>> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
>> ---
>> .../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 40 +++++++------------
>> .../net/ethernet/freescale/dpaa2/dpaa2-eth.h | 1 -
>> 2 files changed, 15 insertions(+), 26 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
>> b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
>> index 19379bae0144..8c3391e6e598 100644
>> --- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
>> +++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
>> @@ -29,16 +29,6 @@ MODULE_LICENSE("Dual BSD/GPL");
>> MODULE_AUTHOR("Freescale Semiconductor, Inc");
>> MODULE_DESCRIPTION("Freescale DPAA2 Ethernet Driver");
>>
>> -static void *dpaa2_iova_to_virt(struct iommu_domain *domain,
>> - dma_addr_t iova_addr)
>> -{
>> - phys_addr_t phys_addr;
>> -
>> - phys_addr = domain ? iommu_iova_to_phys(domain, iova_addr) :
>> iova_addr;
>> -
>> - return phys_to_virt(phys_addr);
>> -}
>> -
>> static void validate_rx_csum(struct dpaa2_eth_priv *priv,
>> u32 fd_status,
>> struct sk_buff *skb)
>> @@ -85,9 +75,10 @@ static void free_rx_fd(struct dpaa2_eth_priv *priv,
>> sgt = vaddr + dpaa2_fd_get_offset(fd);
>> for (i = 1; i < DPAA2_ETH_MAX_SG_ENTRIES; i++) {
>> addr = dpaa2_sg_get_addr(&sgt[i]);
>> - sg_vaddr = dpaa2_iova_to_virt(priv->iommu_domain, addr);
>> - dma_unmap_page(dev, addr, DPAA2_ETH_RX_BUF_SIZE,
>> - DMA_BIDIRECTIONAL);
>> + sg_vaddr = page_to_virt
>> + (dma_unmap_page_desc(dev, addr,
>> + DPAA2_ETH_RX_BUF_SIZE,
>> + DMA_BIDIRECTIONAL));
>
> This is doing virt -> page -> virt. Why not just have the new
> function return the VA corresponding to the addr, which would
> match the other functions?
I'd really like that as it would get rid of the page_to_virt() calls but
it will break the symmetry with the dma_map_page() API. I'll let the
maintainers decide.
---
Best Regards, Laurentiu
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2019-10-28 10:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 12:41 [PATCH v2 0/3] dma-mapping: introduce new dma unmap and sync variants Laurentiu Tudor
2019-10-24 12:41 ` [PATCH v2 1/3] dma-mapping: introduce new dma unmap and sync api variants Laurentiu Tudor
2019-10-28 12:38 ` hch
2019-10-29 7:05 ` Laurentiu Tudor
2019-10-28 13:42 ` Robin Murphy
2019-11-06 11:32 ` Laurentiu Tudor
2019-11-07 12:30 ` Laurentiu Tudor
2019-10-30 9:48 ` kbuild test robot
2019-10-24 12:41 ` [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr Laurentiu Tudor
2019-10-28 13:52 ` Robin Murphy
2019-10-24 12:41 ` [PATCH v2 3/3] dpaa2_eth: use new unmap and sync dma api variants Laurentiu Tudor
2019-10-25 16:12 ` Jonathan Lemon
2019-10-28 10:55 ` Laurentiu Tudor [this message]
2019-10-28 11:38 ` hch
2019-11-06 11:17 ` Laurentiu Tudor
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=00a138f0-3651-5441-7241-5f02956b6c2c@nxp.com \
--to=laurentiu.tudor@nxp.com \
--cc=davem@davemloft.net \
--cc=hch@lst.de \
--cc=ioana.ciornei@nxp.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jlemon@flugsvamp.com \
--cc=leoyang.li@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=madalin.bucur@nxp.com \
--cc=netdev@vger.kernel.org \
--cc=robin.murphy@arm.com \
--cc=ruxandra.radulescu@nxp.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).