From 5da473e965c2f621225d03fa7f7c7c80800272be Mon Sep 17 00:00:00 2001 From: Anatoly Burakov Date: Fri, 13 Jun 2014 15:52:48 +0100 Subject: [PATCH] pci: enable vfio device binding Add support for binding VFIO devices if RTE_PCI_DRV_NEED_MAPPING is set for this driver. Try VFIO first, if not mapped then try IGB_UIO too. Signed-off-by: Anatoly Burakov Tested-by: HuilongX Xu Tested-by: Waterman Cao Acked-by: Thomas Monjalon --- lib/librte_eal/linuxapp/eal/eal_pci.c | 44 +++++++++++++++++++++++++-- 1 file changed, 42 insertions(+), 2 deletions(-) diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c index c7cd38e71d..3b94b6fb54 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c @@ -393,6 +393,30 @@ error: return -1; } +static int +pci_map_device(struct rte_pci_device *dev) +{ + int ret, mapped = 0; + + /* try mapping the NIC resources using VFIO if it exists */ +#ifdef VFIO_PRESENT + if (pci_vfio_is_enabled()) { + ret = pci_vfio_map_resource(dev); + if (ret == 0) + mapped = 1; + else if (ret < 0) + return ret; + } +#endif + /* map resources for devices that use igb_uio */ + if (!mapped) { + ret = pci_uio_map_resource(dev); + if (ret != 0) + return ret; + } + return 0; +} + /* * If vendor/device ID match, call the devinit() function of the * driver. @@ -400,8 +424,8 @@ error: int rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev) { + int ret; struct rte_pci_id *id_table; - int ret = 0; for (id_table = dr->id_table ; id_table->vendor_id != 0; id_table++) { @@ -437,7 +461,7 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) { /* map resources for devices that use igb_uio */ - ret = pci_uio_map_resource(dev); + ret = pci_map_device(dev); if (ret != 0) return ret; } else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND && @@ -474,5 +498,21 @@ rte_eal_pci_init(void) RTE_LOG(ERR, EAL, "%s(): Cannot scan PCI bus\n", __func__); return -1; } +#ifdef VFIO_PRESENT + pci_vfio_enable(); + + if (pci_vfio_is_enabled()) { + + /* if we are primary process, create a thread to communicate with + * secondary processes. the thread will use a socket to wait for + * requests from secondary process to send open file descriptors, + * because VFIO does not allow multiple open descriptors on a group or + * VFIO container. + */ + if (internal_config.process_type == RTE_PROC_PRIMARY && + pci_vfio_mp_sync_setup() < 0) + return -1; + } +#endif return 0; } -- 2.20.1