[dpdk-dev] [PATCH 19/22] pci: reference driver structure for each device

[Thomas Monjalon <thomas.monjalon@6wind.com>]

From: Adrien Mazarguil <adrien.mazarguil@6wind.com>

Add a driver reference (if available) to every PCI devices,
even when blacklisted. This information is made available in the global
device_list variable so users know which network devices are managed or
ignored.

Acked-by: Ivan Boule <ivan.boule@6wind.com>
Acked-by: Damien Millescamps <damien.millescamps@6wind.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
---
 lib/librte_eal/common/eal_common_pci.c  |    3 +--
 lib/librte_eal/common/include/rte_pci.h |    2 ++
 lib/librte_eal/linuxapp/eal/eal_pci.c   |   11 ++++++++++-
 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index fe24265..73d8fb3 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -81,9 +81,8 @@ pci_probe_all_drivers(struct rte_pci_device *dev)
 {
 	struct rte_pci_driver *dr = NULL;
 
+	dev->blacklisted = !!is_blacklisted(dev);
 	TAILQ_FOREACH(dr, &driver_list, next) {
-		if (is_blacklisted(dev))
-			return -1;
 		if (rte_eal_pci_probe_one_driver(dr, dev) == 0)
 			return 0;
 	}
diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h
index f2128b5..b465995 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -111,6 +111,8 @@ struct rte_pci_device {
 	struct rte_pci_id id;                   /**< PCI ID. */
 	struct rte_pci_resource mem_resource;   /**< PCI Memory Resource */
 	struct rte_intr_handle intr_handle;     /**< Interrupt handle */
+	const struct rte_pci_driver *driver;    /**< Associated driver */
+	unsigned int blacklisted:1;             /**< Device is blacklisted */
 };
 
 /** Any PCI device identifier (vendor, device, ...) */
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 78687d6..86002bd 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -731,7 +731,8 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
 		dev->id.vendor_id, dev->id.device_id, dr->name);
 
 		/* Unbind PCI devices if needed */
-		if (module_name != NULL) {
+		if ((!dev->blacklisted) &&
+		    (module_name != NULL)) {
 			if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 			/* unbind current driver, bind ours */
 				if (pci_unbind_kernel_driver(dev) < 0)
@@ -743,6 +744,14 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
 			if (pci_uio_map_resource(dev) < 0)
 				return -1;
 		}
+
+		/* reference driver structure */
+		dev->driver = dr;
+
+		/* no initialization when blacklisted */
+		if (dev->blacklisted)
+			return -1;
+
 		/* call the driver devinit() function */
 		return dr->devinit(dr, dev);
 
-- 
1.7.2.5