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eal/pci: introduce a PCI driver flag

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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.

Suggested-by: Ferruh Yigit <ferruh.yigit@intel.com>
Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
This commit is contained in:
Jerin Jacob 2017-06-09 15:57:45 +05:30 committed by Ferruh Yigit
parent 468d8dc6e8
commit cc0ed2473e
2 changed files with 8 additions and 1 deletions
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7
lib/librte_eal/common/eal_common_pci.c
View File

@ -221,7 +221,12 @@ rte_pci_probe_one_driver(struct rte_pci_driver *dr,
ret = dr->probe(dr, dev);
if (ret) {
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 device is unsupported and
* driver needs mapped resources.
*/
!(ret > 0 &&
(dr->drv_flags & RTE_PCI_DRV_KEEP_MAPPED_RES)))
rte_pci_unmap_device(dev);
}

2
lib/librte_eal/common/include/rte_pci.h
View File

@ -212,6 +212,8 @@ struct rte_pci_bus {
#define RTE_PCI_DRV_INTR_LSC 0x0008
/** Device driver supports device removal interrupt */
#define RTE_PCI_DRV_INTR_RMV 0x0010
/** Device driver needs to keep mapped resources if unsupported dev detected */
#define RTE_PCI_DRV_KEEP_MAPPED_RES 0x0020
/**
* A structure describing a PCI mapping.