[dpdk-dev] [PATCH v6 6/9] Move common functions in eal_pci.c

[Ravi Kerur <rkerur@gmail.com>]

Changes in v6
Split changes due to complexity. v6 includes moving
rte_eal_pci_probe_one_driver function and its associated
utility functions only.

Changes in v5
Rebase to latest code.
Removed RTE_EXEC_ENV_BSDAPP from earlier changes.

Changes in v4
Move common functions in eal_pci.c to librte_eal/common/
eal_common_pci.c file.

Following functions are moved to eal_common_pci.c file.

void *pci_map_resource(void *requested_addr, const int vfio_fd,
      const char *devname, off_t offset, size_t size);
int pci_addr_comparison(struct rte_pci_addr *addr,
                        struct rte_pci_addr *addr2);
int rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr,
                        struct rte_pci_device *dev);

Use RTE_EXEC_ENV_BSDAPP to differentiate minor differences in
common function.
Fix checkpatch warnings and errors.

Changes in v3
N/A

Changes in v2
N/A

Changes in v1
N/A

Signed-off-by: Ravi Kerur <rkerur@gmail.com>
---
 lib/librte_eal/bsdapp/eal/eal_pci.c    | 72 +++++---------------------------
 lib/librte_eal/common/eal_common_pci.c | 72 ++++++++++++++++++++++++++++++++
 lib/librte_eal/common/eal_private.h    | 39 +++++++++++++-----
 lib/librte_eal/linuxapp/eal/eal_pci.c  | 75 +---------------------------------
 4 files changed, 113 insertions(+), 145 deletions(-)

diff --git a/lib/librte_eal/bsdapp/eal/eal_pci.c b/lib/librte_eal/bsdapp/eal/eal_pci.c
index 30f0232..f21b5b6 100644
--- a/lib/librte_eal/bsdapp/eal/eal_pci.c
+++ b/lib/librte_eal/bsdapp/eal/eal_pci.c
@@ -111,7 +111,7 @@ static struct rte_tailq_elem rte_uio_tailq = {
 EAL_REGISTER_TAILQ(rte_uio_tailq)
 
 /* unbind kernel driver for this device */
-static int
+int
 pci_unbind_kernel_driver(struct rte_pci_device *dev __rte_unused)
 {
 	RTE_LOG(ERR, EAL, "RTE_PCI_DRV_FORCE_UNBIND flag is not implemented "
@@ -274,6 +274,13 @@ pci_uio_map_resource(struct rte_pci_device *dev)
 	return (0);
 }
 
+/* map the PCI resource of a PCI device in virtual memory */
+int
+pci_map_device(struct rte_pci_device *dev)
+{
+	return pci_uio_map_resource(dev);
+}
+
 /* Scan one pci sysfs entry, and fill the devices list from it. */
 static int
 pci_scan_one(int dev_pci_fd, struct pci_conf *conf)
@@ -426,68 +433,11 @@ error:
 }
 
 /*
- * If vendor/device ID match, call the devinit() function of the
- * driver.
+ * This function is a no-op in BSD.
  */
-int
-rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr, struct rte_pci_device *dev)
+void
+pci_config_space_set(struct rte_pci_device *dev __rte_unused)
 {
-	struct rte_pci_id *id_table;
-	int ret;
-
-	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",
-				loc->domain, loc->bus, loc->devid, loc->function,
-				dev->numa_node);
-
-		RTE_LOG(DEBUG, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
-				dev->id.device_id, dr->name);
-
-		/* no initialization when blacklisted, return without error */
-		if (dev->devargs != NULL &&
-			dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
-
-			RTE_LOG(DEBUG, EAL, "  Device is blacklisted, not initializing\n");
-			return 0;
-		}
-
-		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
-			/* map resources for devices that use igb_uio */
-			ret = pci_uio_map_resource(dev);
-			if (ret != 0)
-				return ret;
-		} else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
-		           rte_eal_process_type() == RTE_PROC_PRIMARY) {
-			/* unbind current driver */
-			if (pci_unbind_kernel_driver(dev) < 0)
-				return -1;
-		}
-
-		/* reference driver structure */
-		dev->driver = dr;
-
-		/* call the driver devinit() function */
-		return dr->devinit(dr, dev);
-	}
-	/* return positive value if driver is not found */
-	return 1;
 }
 
 /* Init the PCI EAL subsystem */
diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index 808b87b..29b0b63 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -99,6 +99,78 @@ static struct rte_devargs *pci_devargs_lookup(struct rte_pci_device *dev)
 }
 
 /*
+ * 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_id *id_table;
+
+	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",
+				loc->domain, loc->bus, loc->devid, loc->function,
+				dev->numa_node);
+
+		RTE_LOG(DEBUG, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
+				dev->id.device_id, dr->name);
+
+		/* no initialization when blacklisted, return without error */
+		if (dev->devargs != NULL &&
+			dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
+			RTE_LOG(DEBUG, EAL, "  Device is blacklisted, not initializing\n");
+			return 1;
+		}
+
+		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
+#ifdef RTE_PCI_CONFIG
+			/*
+			 * Set PCIe config space for high performance.
+			 * Return value can be ignored.
+			 */
+			pci_config_space_set(dev);
+#endif
+			/* map resources for devices that use igb_uio */
+			ret = pci_map_device(dev);
+			if (ret != 0)
+				return ret;
+		} else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
+		           rte_eal_process_type() == RTE_PROC_PRIMARY) {
+			/* unbind current driver */
+			if (pci_unbind_kernel_driver(dev) < 0)
+				return -1;
+		}
+
+		/* reference driver structure */
+		dev->driver = dr;
+
+		/* call the driver devinit() function */
+		return dr->devinit(dr, dev);
+	}
+	/* return positive value if driver is not found */
+	return 1;
+}
+
+/*
  * If vendor/device ID match, call the devinit() function of all
  * registered driver for the given device. Return -1 if initialization
  * failed, return 1 if no driver is found for this device.
diff --git a/lib/librte_eal/common/eal_private.h b/lib/librte_eal/common/eal_private.h
index 5fd9b50..6eb8a6c 100644
--- a/lib/librte_eal/common/eal_private.h
+++ b/lib/librte_eal/common/eal_private.h
@@ -156,17 +156,6 @@ struct rte_pci_driver;
 struct rte_pci_device;
 
 /**
- * Mmap memory for single PCI device
- *
- * This function is private to EAL.
- *
- * @return
- *   0 on success, negative on error
- */
-int rte_eal_pci_probe_one_driver(struct rte_pci_driver *dr,
-		struct rte_pci_device *dev);
-
-/**
  * Munmap memory for single PCI device
  *
  * This function is private to EAL.
@@ -364,4 +353,32 @@ int rte_eal_hugepage_init(void);
  */
 int rte_eal_hugepage_attach(void);
 
+/**
+ * This function unbinds kernel driver for this device
+ *
+ * This function is private to the EAL.
+ */
+int
+pci_unbind_kernel_driver(struct rte_pci_device *dev);
+
+/**
+ * This function maps resources for devices
+ * that use igb_uio on Linux and it's a
+ * wrapper for pci_uio_map_resource on BSD.
+ *
+ * This function is private to the EAL.
+ */
+int
+pci_map_device(struct rte_pci_device *dev);
+
+/**
+ * This function sets PCIe config space for
+ * high performance.
+ * It's a NO-OP on BSD.
+ *
+ * This function is private to the EAL.
+ */
+void
+pci_config_space_set(struct rte_pci_device *dev);
+
 #endif /* _EAL_PRIVATE_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 9cb0ffd..85c728d 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -57,7 +57,7 @@
  */
 
 /* unbind kernel driver for this device */
-static int
+int
 pci_unbind_kernel_driver(struct rte_pci_device *dev)
 {
 	int n;
@@ -563,7 +563,7 @@ pci_config_space_set(struct rte_pci_device *dev)
 }
 #endif
 
-static int
+int
 pci_map_device(struct rte_pci_device *dev)
 {
 	int ret = -1;
@@ -616,77 +616,6 @@ pci_unmap_device(struct rte_pci_device *dev)
 }
 #endif /* RTE_LIBRTE_EAL_HOTPLUG */
 
-/*
- * If vendor/device ID match, call the devinit() function of the
- * driver.
- */
-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;
-
-	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",
-				loc->domain, loc->bus, loc->devid, loc->function,
-				dev->numa_node);
-
-		RTE_LOG(DEBUG, EAL, "  probe driver: %x:%x %s\n", dev->id.vendor_id,
-				dev->id.device_id, dr->name);
-
-		/* no initialization when blacklisted, return without error */
-		if (dev->devargs != NULL &&
-			dev->devargs->type == RTE_DEVTYPE_BLACKLISTED_PCI) {
-			RTE_LOG(DEBUG, EAL, "  Device is blacklisted, not initializing\n");
-			return 1;
-		}
-
-		if (dr->drv_flags & RTE_PCI_DRV_NEED_MAPPING) {
-#ifdef RTE_PCI_CONFIG
-			/*
-			 * Set PCIe config space for high performance.
-			 * Return value can be ignored.
-			 */
-			pci_config_space_set(dev);
-#endif
-			/* map resources for devices that use igb_uio */
-			ret = pci_map_device(dev);
-			if (ret != 0)
-				return ret;
-		} else if (dr->drv_flags & RTE_PCI_DRV_FORCE_UNBIND &&
-		           rte_eal_process_type() == RTE_PROC_PRIMARY) {
-			/* unbind current driver */
-			if (pci_unbind_kernel_driver(dev) < 0)
-				return -1;
-		}
-
-		/* reference driver structure */
-		dev->driver = dr;
-
-		/* call the driver devinit() function */
-		return dr->devinit(dr, dev);
-	}
-	/* return positive value if driver is not found */
-	return 1;
-}
-
 #ifdef RTE_LIBRTE_EAL_HOTPLUG
 /*
  * If vendor/device ID match, call the devuninit() function of the
-- 
1.9.1