[dpdk-dev] [PATCH 5/9] pci: factorize probe/detach code

[David Marchand <david.marchand@6wind.com>]

Move pci id matching to a helper and reuse it in probe and detach
functions.

Signed-off-by: David Marchand <david.marchand@6wind.com>
---
 lib/librte_eal/common/eal_common_pci.c | 67 ++++++++++++----------------------
 1 file changed, 23 insertions(+), 44 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index 2528775..44549f7 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -174,14 +174,10 @@ pci_add_device(struct rte_pci_device *dev)
 	return 0;
 }
 
-/*
- * If vendor/device ID match, call the devinit() function of the
- * driver.
- */
 static int
-rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
+pci_driver_supports_device(const struct rte_pci_driver *dr,
+			   const struct rte_pci_device *dev)
 {
-	int ret;
 	const struct rte_pci_id *id_table;
 
 	for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
@@ -200,6 +196,20 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
 				id_table->subsystem_device_id != PCI_ANY_ID)
 			continue;
 
+		return 1;
+	}
+	return 0;
+}
+
+/*
+ * If vendor/device ID match, call the devinit() function of the
+ * driver.
+ */
+static int
+rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr,
+			     struct rte_pci_device *dev)
+{
+	int ret;
 		struct rte_pci_addr *loc = &dev->addr;
 
 		RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
@@ -240,9 +250,6 @@ rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *d
 
 		/* call the driver devinit() function */
 		return dr->devinit(dr, dev);
-	}
-	/* return positive value if driver is not found */
-	return 1;
 }
 
 /*
@@ -253,27 +260,6 @@ static int
 rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
 		struct rte_pci_device *dev)
 {
-	const struct rte_pci_id *id_table;
-
-	if ((dr == NULL) || (dev == NULL))
-		return -EINVAL;
-
-	for (id_table = dr->id_table; id_table->vendor_id != 0; id_table++) {
-
-		/* check if device's identifiers match the driver's ones */
-		if (id_table->vendor_id != dev->id.vendor_id &&
-				id_table->vendor_id != PCI_ANY_ID)
-			continue;
-		if (id_table->device_id != dev->id.device_id &&
-				id_table->device_id != PCI_ANY_ID)
-			continue;
-		if (id_table->subsystem_vendor_id != dev->id.subsystem_vendor_id &&
-				id_table->subsystem_vendor_id != PCI_ANY_ID)
-			continue;
-		if (id_table->subsystem_device_id != dev->id.subsystem_device_id &&
-				id_table->subsystem_device_id != PCI_ANY_ID)
-			continue;
-
 		struct rte_pci_addr *loc = &dev->addr;
 
 		RTE_LOG(DEBUG, EAL, "PCI device "PCI_PRI_FMT" on NUMA socket %i\n",
@@ -294,10 +280,6 @@ rte_eal_pci_detach_dev(struct rte_pci_driver *dr,
 			pci_unmap_device(dev);
 
 		return 0;
-	}
-
-	/* return positive value if driver is not found */
-	return 1;
 }
 
 /*
@@ -311,16 +293,16 @@ pci_probe_all_drivers(struct rte_pci_device *dev)
 	struct rte_pci_driver *dr = NULL;
 	int rc = 0;
 
-	if (dev == NULL)
-		return -1;
-
 	TAILQ_FOREACH(dr, &pci_driver_list, next) {
+		if (!pci_driver_supports_device(dr, dev))
+			continue;
+
 		rc = rte_eal_pci_probe_one_driver(dr, dev);
 		if (rc < 0)
 			/* negative value is an error */
 			return -1;
 		if (rc > 0)
-			/* positive value means driver not found */
+			/* positive value means device is blacklisted */
 			continue;
 		return 0;
 	}
@@ -338,17 +320,14 @@ pci_detach_all_drivers(struct rte_pci_device *dev)
 	struct rte_pci_driver *dr = NULL;
 	int rc = 0;
 
-	if (dev == NULL)
-		return -1;
-
 	TAILQ_FOREACH(dr, &pci_driver_list, next) {
+		if (!pci_driver_supports_device(dr, dev))
+			continue;
+
 		rc = rte_eal_pci_detach_dev(dr, dev);
 		if (rc < 0)
 			/* negative value is an error */
 			return -1;
-		if (rc > 0)
-			/* positive value means driver not found */
-			continue;
 		return 0;
 	}
 	return 1;
-- 
1.9.1