[dpdk-dev] [PATCH v9 3/5] eal: support link bonding device initialization

[Thomas Monjalon]

From: Declan Doherty <declan.doherty at intel.com>

Updating functionality in EAL to support adding link bonding
devices via –vdev option. Link bonding devices will be
initialized after all physical devices have been probed and
initialized.

Signed-off-by: Declan Doherty <declan.doherty at intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>
---
 lib/librte_eal/bsdapp/eal/eal.c             | 10 ++++-
 lib/librte_eal/common/eal_common_dev.c      | 58 ++++++++++++++++++++---------
 lib/librte_eal/common/eal_common_pci.c      |  3 ++
 lib/librte_eal/common/include/eal_private.h |  7 ----
 lib/librte_eal/common/include/rte_dev.h     | 14 ++++++-
 lib/librte_eal/linuxapp/eal/eal.c           | 11 +++++-
 6 files changed, 74 insertions(+), 29 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index ce0db03..ec57b26 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -919,7 +919,7 @@ rte_eal_init(int argc, char **argv)
 
 	rte_eal_mcfg_complete();
 
-	if (rte_eal_dev_init() < 0)
+	if (rte_eal_dev_init(PMD_INIT_PRE_PCI_PROBE) < 0)
 		rte_panic("Cannot init pmd devices\n");
 
 	RTE_LCORE_FOREACH_SLAVE(i) {
@@ -951,6 +951,14 @@ rte_eal_init(int argc, char **argv)
 	rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
 	rte_eal_mp_wait_lcore();
 
+	/* Probe & Initialize PCI devices */
+	if (rte_eal_pci_probe())
+			rte_panic("Cannot probe PCI\n");
+
+	/* Initialize any outstanding devices */
+	if (rte_eal_dev_init(PMD_INIT_POST_PCI_PROBE) < 0)
+		rte_panic("Cannot init pmd devices\n");
+
 	return fctret;
 }
 
diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index eae5656..1194419 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -62,7 +62,7 @@ rte_eal_driver_unregister(struct rte_driver *driver)
 }
 
 int
-rte_eal_dev_init(void)
+rte_eal_dev_init(uint8_t init_pri)
 {
 	struct rte_devargs *devargs;
 	struct rte_driver *driver;
@@ -80,30 +80,52 @@ rte_eal_dev_init(void)
 			continue;
 
 		TAILQ_FOREACH(driver, &dev_driver_list, next) {
-			if (driver->type != PMD_VDEV)
-				continue;
+			/* RTE_DEVTYPE_VIRTUAL can only be a virtual or bonded device,
+			 * virtual devices are initialized pre PCI probing and bonded
+			 * device are post pci probing */
+			if ((driver->type == PMD_VDEV && init_pri ==
+					PMD_INIT_PRE_PCI_PROBE) ||
+				(driver->type == PMD_BDEV && init_pri ==
+						PMD_INIT_POST_PCI_PROBE)) {
 
-			/* search a driver prefix in virtual device name */
-			if (!strncmp(driver->name, devargs->virtual.drv_name,
-					strlen(driver->name))) {
-				driver->init(devargs->virtual.drv_name,
-					devargs->args);
-				break;
+				/* search a driver prefix in virtual device name */
+				if (!strncmp(driver->name, devargs->virtual.drv_name,
+						strlen(driver->name))) {
+					printf("init (%u) %s\n", init_pri, devargs->virtual.drv_name);
+					driver->init(devargs->virtual.drv_name,
+						devargs->args);
+					break;
+				}
 			}
 		}
 
-		if (driver == NULL) {
-			rte_panic("no driver found for %s\n",
-				  devargs->virtual.drv_name);
+		/* If initializing pre PCI probe, then we don't expect a bonded driver
+		 * to be found */
+		if (init_pri == PMD_INIT_PRE_PCI_PROBE &&
+				strncmp(PMD_BOND_NAME, devargs->virtual.drv_name,
+					strlen(PMD_BOND_NAME)) != 0) {
+			if (driver == NULL) {
+				rte_panic("no driver found for virtual device %s\n",
+					devargs->virtual.drv_name);
+			}
+		} else if (init_pri == PMD_INIT_POST_PCI_PROBE &&
+				strncmp(PMD_BOND_NAME, devargs->virtual.drv_name,
+					strlen(PMD_BOND_NAME)) == 0) {
+			if (driver == NULL) {
+				rte_panic("no driver found for bonded device %s\n",
+					devargs->virtual.drv_name);
+			}
 		}
 	}
 
-	/* Once the vdevs are initalized, start calling all the pdev drivers */
-	TAILQ_FOREACH(driver, &dev_driver_list, next) {
-		if (driver->type != PMD_PDEV)
-			continue;
-		/* PDEV drivers don't get passed any parameters */
-		driver->init(NULL, NULL);
+	/* Once the vdevs are initialized, start calling all the pdev drivers */
+	if (init_pri == PMD_INIT_PRE_PCI_PROBE) {
+		TAILQ_FOREACH(driver, &dev_driver_list, next) {
+			if (driver->type != PMD_PDEV)
+				continue;
+			/* PDEV drivers don't get passed any parameters */
+			driver->init(NULL, NULL);
+		}
 	}
 	return 0;
 }
diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index af809a8..c637361 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -150,6 +150,9 @@ rte_eal_pci_probe(void)
 		probe_all = 1;
 
 	TAILQ_FOREACH(dev, &pci_device_list, next) {
+		/* check if device has already been initialized */
+		if (dev->driver != NULL)
+			continue;
 
 		/* set devargs in PCI structure */
 		devargs = pci_devargs_lookup(dev);
diff --git a/lib/librte_eal/common/include/eal_private.h b/lib/librte_eal/common/include/eal_private.h
index 232fcec..b440ffb 100644
--- a/lib/librte_eal/common/include/eal_private.h
+++ b/lib/librte_eal/common/include/eal_private.h
@@ -196,11 +196,4 @@ int rte_eal_intr_init(void);
  */
 int rte_eal_alarm_init(void);
 
-/**
- * This function initialises any virtual devices
- *
- * This function is private to the EAL.
- */
-int rte_eal_dev_init(void);
-
 #endif /* _EAL_PRIVATE_H_ */
diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
index f7e3a10..d89f1a5 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -62,6 +62,16 @@ typedef int (rte_dev_init_t)(const char *name, const char *args);
 enum pmd_type {
 	PMD_VDEV = 0,
 	PMD_PDEV = 1,
+	PMD_BDEV = 2,	/**< Poll Mode Driver Bonded Device*/
+};
+
+#define PMD_BOND_NAME "eth_bond"
+
+/**
+ * Driver initialization */
+enum pmd_init_priority {
+	PMD_INIT_PRE_PCI_PROBE = 0,
+	PMD_INIT_POST_PCI_PROBE = 1,
 };
 
 /**
@@ -93,9 +103,9 @@ void rte_eal_driver_register(struct rte_driver *driver);
 void rte_eal_driver_unregister(struct rte_driver *driver);
 
 /**
- * Initalize all the registered drivers in this process
+ * Initialize all the registered drivers in this process
  */
-int rte_eal_dev_init(void);
+int rte_eal_dev_init(uint8_t init_priority);
 
 #define PMD_REGISTER_DRIVER(d)\
 void devinitfn_ ##d(void);\
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 00d74ed..d1c082d 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -75,6 +75,7 @@
 #include <rte_atomic.h>
 #include <malloc_heap.h>
 #include <rte_eth_ring.h>
+#include <rte_dev.h>
 
 #include "eal_private.h"
 #include "eal_thread.h"
@@ -1142,7 +1143,7 @@ rte_eal_init(int argc, char **argv)
 	RTE_LOG(DEBUG, EAL, "Master core %u is ready (tid=%x)\n",
 		rte_config.master_lcore, (int)thread_id);
 
-	if (rte_eal_dev_init() < 0)
+	if (rte_eal_dev_init(PMD_INIT_PRE_PCI_PROBE) < 0)
 		rte_panic("Cannot init pmd devices\n");
 
 	RTE_LCORE_FOREACH_SLAVE(i) {
@@ -1172,6 +1173,14 @@ rte_eal_init(int argc, char **argv)
 	rte_eal_mp_remote_launch(sync_func, NULL, SKIP_MASTER);
 	rte_eal_mp_wait_lcore();
 
+	/* Probe & Initialize PCI devices */
+	if (rte_eal_pci_probe())
+			rte_panic("Cannot probe PCI\n");
+
+	/* Initialize any outstanding devices */
+	if (rte_eal_dev_init(PMD_INIT_POST_PCI_PROBE) < 0)
+		rte_panic("Cannot init pmd devices\n");
+
 	return fctret;
 }
 
-- 
2.0.0