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[dpdk-dev,23/25] eal/pci: Add rte_eal_pci_probe_one and rte_eal_pci_close_one

Message ID 1416474399-16851-24-git-send-email-mukawa@igel.co.jp (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Tetsuya Mukawa Nov. 20, 2014, 9:06 a.m. UTC
The functions are used for probe and close a device.
First the function tries to find a device that has the specfied PCI address.
Then, probe or close the device.

Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
---
 lib/librte_eal/common/eal_common_pci.c  | 58 +++++++++++++++++++++++++++++++++
 lib/librte_eal/common/include/rte_pci.h | 26 +++++++++++++++
 2 files changed, 84 insertions(+)
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Patch

diff --git a/lib/librte_eal/common/eal_common_pci.c b/lib/librte_eal/common/eal_common_pci.c
index b404ee0..5ff7b49 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -152,6 +152,64 @@  pci_close_all_drivers(struct rte_pci_device *dev)
 {
 	return pci_invoke_all_drivers(dev, INVOKE_CLOSE);
 }
+
+static int
+rte_eal_pci_invoke_one(struct rte_pci_addr *addr, int type)
+{
+	struct rte_pci_device *dev = NULL;
+	int ret = 0;
+
+	TAILQ_FOREACH(dev, &pci_device_list, next) {
+		if (eal_compare_pci_addr(&dev->addr, addr))
+			continue;
+
+		switch (type) {
+		case INVOKE_PROBE:
+			ret = pci_probe_all_drivers(dev);
+			break;
+		case INVOKE_CLOSE:
+			ret = pci_close_all_drivers(dev);
+			break;
+		}
+		if (ret < 0)
+			goto invoke_err_return;
+		if (type == INVOKE_CLOSE)
+			goto remove_dev;
+		return 0;
+	}
+
+	return -1;
+
+invoke_err_return:
+	RTE_LOG(WARNING, EAL, "Requested device " PCI_PRI_FMT
+			" cannot be used\n", dev->addr.domain, dev->addr.bus,
+			dev->addr.devid, dev->addr.function);
+	return -1;
+
+remove_dev:
+	TAILQ_REMOVE(&pci_device_list, dev, next);
+	return 0;
+}
+
+/*
+ * Find the pci device specified by pci address, then invoke probe function of
+ * the driver of the devive.
+ */
+int
+rte_eal_pci_probe_one(struct rte_pci_addr *addr)
+{
+	return rte_eal_pci_invoke_one(addr, INVOKE_PROBE);
+}
+
+/*
+ * Find the pci device specified by pci address, then invoke close function of
+ * the driver of the devive.
+ */
+int
+rte_eal_pci_close_one(struct rte_pci_addr *addr)
+{
+	return rte_eal_pci_invoke_one(addr, INVOKE_CLOSE);
+}
 #endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */
 
 /*
diff --git a/lib/librte_eal/common/include/rte_pci.h b/lib/librte_eal/common/include/rte_pci.h
index 74720d1..33300be 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -311,6 +311,32 @@  eal_compare_pci_addr(struct rte_pci_addr *addr, struct rte_pci_addr *addr2)
 int rte_eal_pci_probe(void);
 
 /**
+ * Probe the single PCI device.
+ *
+ * Scan the content of the PCI bus, and find the pci device specified by pci
+ * addrrss, then call the probe() function for registered driver that has a
+ * matching entry in its id_table for discovered device.
+ *
+ * @return
+ *   - 0 on success.
+ *   - Negative on error.
+ */
+int rte_eal_pci_probe_one(struct rte_pci_addr *addr);
+
+/**
+ * Close the single PCI device.
+ *
+ * Scan the content of the PCI bus, and find the pci device specified by pci
+ * addrrss, then call the close() function for registered driver that has a
+ * matching entry in its id_table for discovered device.
+ *
+ * @return
+ *   - 0 on success.
+ *   - Negative on error.
+ */
+int rte_eal_pci_close_one(struct rte_pci_addr *addr);
+
+/**
  * Dump the content of the PCI bus.
  *
  * @param f