From: "yangx.jy@fujitsu.com" <yangx.jy@fujitsu.com>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: "linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>,
"tom@talpey.com" <tom@talpey.com>,
"yanjun.zhu@linux.dev" <yanjun.zhu@linux.dev>,
"rpearsonhpe@gmail.com" <rpearsonhpe@gmail.com>,
"y-goto@fujitsu.com" <y-goto@fujitsu.com>,
"lizhijian@fujitsu.com" <lizhijian@fujitsu.com>,
"tomasz.gromadzki@intel.com" <tomasz.gromadzki@intel.com>
Subject: Re: [RFC PATCH v2 2/2] RDMA/rxe: Support RDMA Atomic Write operation
Date: Tue, 18 Jan 2022 09:03:55 +0000 [thread overview]
Message-ID: <61E68279.7040406@fujitsu.com> (raw)
In-Reply-To: <61E67499.4010408@fujitsu.com>
Hi,
Sorry for the duplicate replies.
Best Regards,
Xiao Yang
On 2022/1/18 16:04, yangx.jy@fujitsu.com wrote:
> On 2022/1/17 21:16, Jason Gunthorpe wrote:
>> On Thu, Jan 13, 2022 at 11:03:50AM +0800, Xiao Yang wrote:
>>> +static enum resp_states process_atomic_write(struct rxe_qp *qp,
>>> + struct rxe_pkt_info *pkt)
>>> +{
>>> + struct rxe_mr *mr = qp->resp.mr;
>>> +
>>> + u64 *src = payload_addr(pkt);
>>> +
>>> + u64 *dst = iova_to_vaddr(mr, qp->resp.va + qp->resp.offset, sizeof(u64));
>>> + if (!dst || (uintptr_t)dst& 7)
>>> + return RESPST_ERR_MISALIGNED_ATOMIC;
>> It looks to me like iova_to_vaddr is completely broken, where is the
>> kmap on that flow?
> Hi Jason,
>
> I think rxe_mr_init_user() maps the user addr space to the kernel addr
> space during memory region registration, the mapping records are saved
> into mr->cur_map_set->map[x].
> Why do you think iova_to_vaddr() is completely broken?
>
> Best Regards,
> Xiao Yang
>> Jason
prev parent reply other threads:[~2022-01-18 9:04 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-13 3:03 [RFC PATCH v2 0/2] RDMA/rxe: Add RDMA Atomic Write operation Xiao Yang
2022-01-13 3:03 ` [RFC PATCH v2 1/2] RDMA/rxe: Rename send_atomic_ack() and atomic member of struct resp_res Xiao Yang
2022-01-13 3:03 ` [RFC PATCH v2 2/2] RDMA/rxe: Support RDMA Atomic Write operation Xiao Yang
2022-01-17 13:16 ` Jason Gunthorpe
2022-01-18 8:01 ` yangx.jy
2022-01-18 12:35 ` Jason Gunthorpe
2022-01-19 1:54 ` lizhijian
2022-01-19 12:36 ` Jason Gunthorpe
2022-01-19 16:47 ` Ira Weiny
2022-01-20 12:07 ` Li, Zhijian
2022-01-21 12:58 ` Jason Gunthorpe
2022-01-21 16:06 ` Ira Weiny
2022-01-21 16:08 ` Ira Weiny
2022-01-24 3:47 ` lizhijian
2022-01-27 9:37 ` yangx.jy
2022-01-27 9:57 ` hch
2022-01-27 18:08 ` Ira Weiny
2022-01-28 6:16 ` hch
2022-01-28 19:15 ` Ira Weiny
2022-02-10 11:06 ` yangx.jy
2022-02-11 18:30 ` Ira Weiny
2022-01-18 8:02 ` yangx.jy
2022-01-18 8:04 ` yangx.jy
2022-01-18 9:03 ` yangx.jy [this message]
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