From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Jerin Jacob <jerin.jacob@caviumnetworks.com>, dev@dpdk.org
Cc: thomas@monjalon.net
Subject: Re: [dpdk-dev] [PATCH v2 1/2] eal/pci: introduce a PCI driver flag
Date: Thu, 8 Jun 2017 15:40:33 +0100 [thread overview]
Message-ID: <b56f6575-0378-b4af-35ef-a102e4821c04@intel.com> (raw)
In-Reply-To: <20170608114414.8787-1-jerin.jacob@caviumnetworks.com>
On 6/8/2017 12:44 PM, Jerin Jacob wrote:
> Some ethdev devices like nicvf thunderx PMD need special treatment for
> Secondary queue set(SQS) PCIe VF devices, where, it expects to not unmap
> or free the memory without registering the ethdev subsystem.
>
> Introducing a new RTE_PCI_DRV_KEEP_MAPPED_RES
> PCI driver flag to request PCI subsystem to not unmap the mapped PCI
> resources(PCI BAR address) if unsupported device detected.
>
> Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
<...>
> @@ -235,6 +240,7 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr,
> static int
> rte_pci_detach_dev(struct rte_pci_device *dev)
> {
> + int ret = 0;
> struct rte_pci_addr *loc;
> struct rte_pci_driver *dr;
>
> @@ -251,13 +257,18 @@ rte_pci_detach_dev(struct rte_pci_device *dev)
> RTE_LOG(DEBUG, EAL, " remove driver: %x:%x %s\n", dev->id.vendor_id,
> dev->id.device_id, dr->driver.name);
>
> - if (dr->remove && (dr->remove(dev) < 0))
> - return -1; /* negative value is an error */
> + if (dr->remove) {
> + ret = dr->remove(dev);
> + if (ret < 0)
> + return -1; /* negative value is an error */
> + }
>
> /* clear driver structure */
> dev->driver = NULL;
>
> - if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING)
> + if ((dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) &&
> + /* Don't unmap if dev is unsupported and it needs mapped resources */
> + !(ret > 0 && (dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES)))
Why it is required to keep mapping during detach?
> /* unmap resources for devices that use igb_uio */
> rte_pci_unmap_device(dev);
>
<...>
next prev parent reply other threads:[~2017-06-08 14:40 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-01 13:05 [dpdk-dev] [PATCH] net/thunderx: manage PCI device mapping for SQS VFs Jerin Jacob
2017-06-06 13:36 ` Ferruh Yigit
2017-06-06 14:05 ` Jerin Jacob
2017-06-06 14:54 ` Ferruh Yigit
2017-06-08 11:44 ` [dpdk-dev] [PATCH v2 1/2] eal/pci: introduce a PCI driver flag Jerin Jacob
2017-06-08 11:44 ` [dpdk-dev] [PATCH v2 2/2] net/thunderx: manage PCI device mapping for SQS VFs Jerin Jacob
2017-06-08 14:40 ` Ferruh Yigit [this message]
2017-06-08 17:15 ` [dpdk-dev] [PATCH v2 1/2] eal/pci: introduce a PCI driver flag Jerin Jacob
2017-06-08 19:44 ` Ferruh Yigit
2017-06-09 4:35 ` Jerin Jacob
2017-06-09 9:13 ` Ferruh Yigit
2017-06-09 9:27 ` Jerin Jacob
2017-06-09 10:27 ` [dpdk-dev] [PATCH v3 " Jerin Jacob
2017-06-09 10:27 ` [dpdk-dev] [PATCH v3 2/2] net/thunderx: manage PCI device mapping for SQS VFs Jerin Jacob
2017-06-09 10:46 ` [dpdk-dev] [PATCH v3 1/2] eal/pci: introduce a PCI driver flag Ferruh Yigit
2017-06-12 16:02 ` Ferruh Yigit
2017-06-12 16:21 ` Thomas Monjalon
2017-06-13 4:43 ` Jerin Jacob
2017-06-13 7:03 ` Thomas Monjalon
2017-06-13 7:24 ` Jerin Jacob
2017-06-13 8:18 ` Thomas Monjalon
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