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From: Shreyansh Jain <shreyansh.jain@nxp.com>
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Date: Wed, 18 Jan 2017 16:07:55 +0530
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Subject: [dpdk-dev] [PATCH v9 07/12] eal: integrate bus scan and probe with
EAL
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Add functions for scanning all the buses and performing probe on all
the buses on EAL initialization.
Presently, no bus exists - in subseqent patches, PCI bus would be
introduced.
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
lib/librte_eal/bsdapp/eal/eal.c | 7 +++++
lib/librte_eal/bsdapp/eal/rte_eal_version.map | 2 ++
lib/librte_eal/common/eal_common_bus.c | 40 +++++++++++++++++++++++++
lib/librte_eal/common/include/rte_bus.h | 19 ++++++++++++
lib/librte_eal/linuxapp/eal/eal.c | 8 +++++
lib/librte_eal/linuxapp/eal/rte_eal_version.map | 2 ++
6 files changed, 78 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index 2206277..f0abd82 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -577,6 +577,9 @@ rte_eal_init(int argc, char **argv)
rte_config.master_lcore, thread_id, cpuset,
ret == 0 ? "" : "...");
+ if (rte_bus_scan())
+ rte_panic("Cannot scan the buses for devices\n");
+
RTE_LCORE_FOREACH_SLAVE(i) {
/*
@@ -613,6 +616,10 @@ rte_eal_init(int argc, char **argv)
if (rte_eal_pci_probe())
rte_panic("Cannot probe PCI\n");
+ /* Probe all the buses and devices/drivers on them */
+ if (rte_bus_probe())
+ rte_panic("Cannot probe devices\n");
+
if (rte_eal_dev_init() < 0)
rte_panic("Cannot init pmd devices\n");
diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
index c015889..c43140c 100644
--- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map
@@ -182,6 +182,8 @@ DPDK_17.02 {
rte_bus_dump;
rte_bus_register;
rte_bus_unregister;
+ rte_bus_probe;
+ rte_bus_scan;
rte_pci_match;
} DPDK_16.11;
diff --git a/lib/librte_eal/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 3f529e6..ead9a22 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -65,6 +65,46 @@ rte_bus_unregister(struct rte_bus *bus)
RTE_LOG(INFO, EAL, "Unregistered [%s] bus.\n", bus->name);
}
+/* Scan all the buses for registering devices */
+int
+rte_bus_scan(void)
+{
+ int ret;
+ struct rte_bus *bus = NULL;
+
+ TAILQ_FOREACH(bus, &rte_bus_list, next) {
+ ret = bus->scan();
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
+ bus->name);
+ /* Error in scanning any bus stops the EAL init. */
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* Call bus specific probe */
+int
+rte_bus_probe(void)
+{
+ int ret;
+ struct rte_bus *bus;
+
+ /* For each bus registered with EAL */
+ TAILQ_FOREACH(bus, &rte_bus_list, next) {
+ ret = bus->probe();
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Bus (%s) probe failed.\n",
+ bus->name);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
/* Dump information of a single bus */
static int
bus_dump_one(FILE *f, struct rte_bus *bus)
diff --git a/lib/librte_eal/common/include/rte_bus.h b/lib/librte_eal/common/include/rte_bus.h
index 17583ad..4b4bb36 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -113,6 +113,25 @@ void rte_bus_register(struct rte_bus *bus);
void rte_bus_unregister(struct rte_bus *bus);
/**
+ * Scan all the buses attached to the framework.
+ *
+ * @return
+ * 0 in case of success in scanning all buses
+ * !0 in case of failure to scan
+ */
+int rte_bus_scan(void);
+
+/**
+ * For each device on the bus, perform a driver 'match' and call the
+ * bus's probe for device initialization.
+ *
+ * @return
+ * 0 for successful match/probe
+ * !0 otherwise
+ */
+int rte_bus_probe(void);
+
+/**
* Dump information of all the buses registered with EAL.
*
* @param f
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 16dd5b9..f77ff5c 100644
--- a/lib/librte_eal/linuxapp/eal/eal.c
+++ b/lib/librte_eal/linuxapp/eal/eal.c
@@ -69,6 +69,7 @@
#include <rte_string_fns.h>
#include <rte_cpuflags.h>
#include <rte_interrupts.h>
+#include <rte_bus.h>
#include <rte_pci.h>
#include <rte_dev.h>
#include <rte_devargs.h>
@@ -844,6 +845,9 @@ rte_eal_init(int argc, char **argv)
if (rte_eal_intr_init() < 0)
rte_panic("Cannot init interrupt-handling thread\n");
+ if (rte_bus_scan())
+ rte_panic("Cannot scan the buses for devices\n");
+
RTE_LCORE_FOREACH_SLAVE(i) {
/*
@@ -884,6 +888,10 @@ rte_eal_init(int argc, char **argv)
if (rte_eal_pci_probe())
rte_panic("Cannot probe PCI\n");
+ /* Probe all the buses and devices/drivers on them */
+ if (rte_bus_probe())
+ rte_panic("Cannot probe devices\n");
+
if (rte_eal_dev_init() < 0)
rte_panic("Cannot init pmd devices\n");
diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
index 5ed2589..6f047c5 100644
--- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map
+++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map
@@ -186,6 +186,8 @@ DPDK_17.02 {
rte_bus_dump;
rte_bus_register;
rte_bus_unregister;
+ rte_bus_probe;
+ rte_bus_scan;
rte_pci_match;
} DPDK_16.11;
--
2.7.4