From: Alejandro Lucero <alejandro.lucero@netronome.com>
To: Eelco Chaudron <echaudro@redhat.com>
Cc: dev <dev@dpdk.org>,
stable@dpdk.org, "Burakov, Anatoly" <anatoly.burakov@intel.com>,
Maxime Coquelin <maxime.coquelin@redhat.com>,
Ferruh Yigit <ferruh.yigit@intel.com>,
Andrew Rybchenko <arybchenko@solarflare.com>
Subject: Re: [dpdk-stable] [PATCH v3 2/6] ethdev: add function for checking IOVAs by a device
Date: Tue, 10 Jul 2018 10:44:48 +0100 [thread overview]
Message-ID: <CAD+H993gEbAmG==Ef_4eG37JjsWHHrxXcUfSPQGGGLWAamVJGg@mail.gmail.com> (raw)
In-Reply-To: <CAD+H992Q6pC0CYpgpNUTT37dHxFKACv=Msz1eAhtY_MSZp0fWA@mail.gmail.com>
On Tue, Jul 10, 2018 at 10:42 AM, Alejandro Lucero <
alejandro.lucero@netronome.com> wrote:
>
>
> On Tue, Jul 10, 2018 at 9:57 AM, Eelco Chaudron <echaudro@redhat.com>
> wrote:
>
>>
>>
>> On 4 Jul 2018, at 14:53, Alejandro Lucero wrote:
>>
>> A PMD should invoke this function for checking memsegs iovas are within
>>> the supported range by the device.
>>>
>>> Signed-off-by: Alejandro Lucero <alejandro.lucero@netronome.com>
>>>
>>
>> Agree with Andrew here, why not call rte_eal_check_dma_mask() directly in
>> nfp_net_txq_full()?
>>
>>
BTW, IOVA checking can not be done inside PMD functions like that one
because that is in the fast path. Any IOVA checking needs to be done at
initialization time.
>
> My idea was to add this indirection for handling dma mask when just part
> of the IOVAs are not usable. Now, if the dma mask finds a problem, the PMD
> does not make any port initialization.
>
> Memory management is changing and ideally an app should just allocate
> memory safe to be used by the PMD when that memory is going to be used for
> sending or receiving data, what is not always the case.
>
> It is true this indirection is not being used for any purpose by now, so
> yes, I could use a direct call the the EAL one.
>
>
>>
>> ---
>>> lib/librte_ether/rte_ethdev.h | 13 +++++++++++++
>>> lib/librte_ether/rte_ethdev_version.map | 1 +
>>> 2 files changed, 14 insertions(+)
>>>
>>> diff --git a/lib/librte_ether/rte_ethdev.h
>>> b/lib/librte_ether/rte_ethdev.h
>>> index eba11ca..e51a432 100644
>>> --- a/lib/librte_ether/rte_ethdev.h
>>> +++ b/lib/librte_ether/rte_ethdev.h
>>> @@ -2799,6 +2799,19 @@ int rte_eth_dev_set_vlan_ether_type(uint16_t
>>> port_id,
>>> int rte_eth_dev_set_vlan_pvid(uint16_t port_id, uint16_t pvid, int on);
>>>
>>> /**
>>> + * check device dma mask within expected range based on dma mask.
>>> + *
>>> + * @param maskbits
>>> + * mask length in bits
>>> + *
>>> + */
>>> +static inline int
>>> +rte_eth_dev_check_dma_mask(uint8_t maskbits)
>>> +{
>>> + return rte_eal_check_dma_mask(maskbits);
>>> +}
>>> +
>>> +/**
>>> *
>>> * Retrieve a burst of input packets from a receive queue of an Ethernet
>>> * device. The retrieved packets are stored in *rte_mbuf* structures
>>> whose
>>> diff --git a/lib/librte_ether/rte_ethdev_version.map
>>> b/lib/librte_ether/rte_ethdev_version.map
>>> index e9681ac..0b11b8a 100644
>>> --- a/lib/librte_ether/rte_ethdev_version.map
>>> +++ b/lib/librte_ether/rte_ethdev_version.map
>>> @@ -191,6 +191,7 @@ DPDK_17.08 {
>>> DPDK_17.11 {
>>> global:
>>>
>>> + rte_eth_dev_check_dma_mask;
>>> rte_eth_dev_get_sec_ctx;
>>> rte_eth_dev_pool_ops_supported;
>>> rte_eth_dev_reset;
>>> --
>>> 1.9.1
>>>
>>
>
next prev parent reply other threads:[~2018-07-10 9:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-04 12:53 [dpdk-stable] [PATCH v3 0/6] use IOVAs check based on DMA mask Alejandro Lucero
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 1/6] mem: add function for checking memsegs IOVAs addresses Alejandro Lucero
2018-07-10 8:56 ` Eelco Chaudron
2018-07-10 9:34 ` Alejandro Lucero
2018-07-10 10:06 ` Eelco Chaudron
2018-07-10 10:52 ` Alejandro Lucero
2018-07-10 11:14 ` Eelco Chaudron
2018-07-10 11:33 ` Burakov, Anatoly
2018-07-10 11:43 ` Alejandro Lucero
2018-07-10 11:55 ` Eelco Chaudron
2018-07-10 11:40 ` Alejandro Lucero
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 2/6] ethdev: add function for checking IOVAs by a device Alejandro Lucero
2018-07-07 17:30 ` [dpdk-stable] [dpdk-dev] " Andrew Rybchenko
2018-07-10 8:57 ` [dpdk-stable] " Eelco Chaudron
2018-07-10 9:42 ` Alejandro Lucero
2018-07-10 9:44 ` Alejandro Lucero [this message]
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 3/6] bus/pci: use IOVAs check when setting IOVA mode Alejandro Lucero
2018-07-10 10:14 ` Eelco Chaudron
2018-07-10 15:37 ` Alejandro Lucero
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 4/6] mem: use address hint for mapping hugepages Alejandro Lucero
2018-07-10 11:15 ` Eelco Chaudron
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 5/6] net/nfp: check hugepages IOVAs based on DMA mask Alejandro Lucero
2018-07-10 10:17 ` Eelco Chaudron
2018-07-04 12:53 ` [dpdk-stable] [PATCH v3 6/6] net/nfp: support IOVA VA mode Alejandro Lucero
2018-07-10 10:18 ` Eelco Chaudron
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