From: Michal Kalderon <mkalderon@marvell.com>
To: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Ariel Elior <aelior@marvell.com>,
"dledford@redhat.com" <dledford@redhat.com>,
"bmt@zurich.ibm.com" <bmt@zurich.ibm.com>,
"galpress@amazon.com" <galpress@amazon.com>,
"sleybo@amazon.com" <sleybo@amazon.com>,
"leon@kernel.org" <leon@kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: RE: [EXT] Re: [PATCH v11 rdma-next 2/7] RDMA/core: Create mmap database and cookie helper functions
Date: Tue, 24 Sep 2019 08:31:16 +0000 [thread overview]
Message-ID: <MN2PR18MB3182E0034A68DF1452BA73C6A1840@MN2PR18MB3182.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20190923133000.GD12047@ziepe.ca>
> From: linux-rdma-owner@vger.kernel.org <linux-rdma-
> owner@vger.kernel.org> On Behalf Of Jason Gunthorpe
>
> On Mon, Sep 23, 2019 at 09:36:01AM +0000, Michal Kalderon wrote:
> > > > + * will use the key to retrieve information such as address to
> > > > + * be mapped and how.
> > > > + *
> > > > + * Return: unique key or RDMA_USER_MMAP_INVALID if entry was
> not
> > > added.
> > > > + */
> > > > +u64 rdma_user_mmap_entry_insert(struct ib_ucontext *ucontext,
> > > > + struct rdma_user_mmap_entry *entry,
> > > > + size_t length)
> > >
> > > The similarly we don't need to return a u64 here and the sort of
> > > ugly RDMA_USER_MMAP_INVALID can go away
> >
> > So you mean add a return code here ? and on failure driver will delete
> > the Allocated xx_user_mmap_entry and not store it in xx_key ?
>
> I'm not sure what this means
>
Before fixing: driver allocated rdma_user_mmap_entry, receives a key and stores
The key, if the key received is INVALID the driver frees the allocated entry.
Wanted to make sure I understand correctly that you're requesting I change the
Function to return an error code, and on success the driver will store the pointer
To the mmap_entry structure and on failure free it ?
And the driver will not hold the value of the key, instead call a helper function if it is required ?
Thanks,
Michal
> Jason
next prev parent reply other threads:[~2019-09-24 8:31 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 10:01 [PATCH v11 rdma-next 0/7] RDMA/qedr: Use the doorbell overflow recovery mechanism for RDMA Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 1/7] RDMA/core: Move core content from ib_uverbs to ib_core Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 2/7] RDMA/core: Create mmap database and cookie helper functions Michal Kalderon
2019-09-19 17:14 ` Jason Gunthorpe
2019-09-19 17:48 ` Jason Gunthorpe
2019-09-19 18:07 ` Jason Gunthorpe
2019-09-23 9:36 ` [EXT] " Michal Kalderon
2019-09-23 13:30 ` Jason Gunthorpe
2019-09-24 8:31 ` Michal Kalderon [this message]
2019-09-24 12:37 ` Jason Gunthorpe
2019-09-05 10:01 ` [PATCH v11 rdma-next 3/7] RDMA/efa: Use the common mmap_xa helpers Michal Kalderon
2019-09-19 17:37 ` Jason Gunthorpe
2019-09-23 9:15 ` Michal Kalderon
2019-09-23 13:28 ` Jason Gunthorpe
2019-09-05 10:01 ` [PATCH v11 rdma-next 4/7] RDMA/siw: " Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 5/7] RDMA/qedr: Use the common mmap API Michal Kalderon
2019-09-19 17:55 ` Jason Gunthorpe
2019-09-20 13:39 ` Gal Pressman
2019-09-23 9:21 ` Michal Kalderon
2019-09-23 13:29 ` Jason Gunthorpe
2019-09-24 8:25 ` [EXT] " Michal Kalderon
2019-09-24 8:49 ` Pressman, Gal
2019-09-24 9:31 ` Michal Kalderon
2019-10-20 7:19 ` Gal Pressman
2019-10-21 17:33 ` Jason Gunthorpe
2019-10-23 6:40 ` Gal Pressman
2019-10-23 14:41 ` Jason Gunthorpe
2019-10-24 8:06 ` Gal Pressman
2019-09-05 10:01 ` [PATCH v11 rdma-next 6/7] RDMA/qedr: Add doorbell overflow recovery support Michal Kalderon
2019-09-19 18:02 ` Jason Gunthorpe
2019-09-20 13:30 ` Gal Pressman
2019-09-20 13:38 ` Jason Gunthorpe
2019-09-20 14:00 ` Gal Pressman
2019-09-23 9:37 ` Michal Kalderon
2019-09-25 19:16 ` [EXT] " Michal Kalderon
2019-09-25 19:21 ` Jason Gunthorpe
2019-09-25 19:37 ` Michal Kalderon
2019-09-26 19:10 ` Jason Gunthorpe
2019-09-23 9:30 ` Michal Kalderon
2019-09-23 13:26 ` Jason Gunthorpe
2019-09-05 10:01 ` [PATCH v11 rdma-next 7/7] RDMA/qedr: Add iWARP doorbell " Michal Kalderon
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