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From: Shreyansh Jain <shreyansh.jain@nxp.com>
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Subject: [dpdk-dev] [PATCH v5 04/12] eal: integrate bus scan and probe with
EAL
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Still a dummy implementation as no real bus driver exists. This adds calls
from EAL to bus specific scan, match functions.
Once driver->probe is in place, and a bus handler has been installed,
the code would become effective.
Signed-off-by: Shreyansh Jain <shreyansh.jain@nxp.com>
---
lib/librte_eal/bsdapp/eal/eal.c | 7 +++++++
lib/librte_eal/common/eal_common_bus.c | 30 ++++++++++++++++++++++++++++++
lib/librte_eal/common/include/rte_bus.h | 19 +++++++++++++++++++
lib/librte_eal/linuxapp/eal/eal.c | 7 +++++++
4 files changed, 63 insertions(+)
diff --git a/lib/librte_eal/bsdapp/eal/eal.c b/lib/librte_eal/bsdapp/eal/eal.c
index 2206277..2c223de 100644
--- a/lib/librte_eal/bsdapp/eal/eal.c
+++ b/lib/librte_eal/bsdapp/eal/eal.c
@@ -64,6 +64,7 @@
#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>
@@ -577,6 +578,9 @@ rte_eal_init(int argc, char **argv)
rte_config.master_lcore, thread_id, cpuset,
ret == 0 ? "" : "...");
+ if (rte_eal_bus_scan())
+ rte_panic("Cannot scan the buses for devices\n");
+
RTE_LCORE_FOREACH_SLAVE(i) {
/*
@@ -613,6 +617,9 @@ rte_eal_init(int argc, char **argv)
if (rte_eal_pci_probe())
rte_panic("Cannot probe PCI\n");
+ if (rte_eal_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/common/eal_common_bus.c b/lib/librte_eal/common/eal_common_bus.c
index 5a5ae75..b7ccbd8 100644
--- a/lib/librte_eal/common/eal_common_bus.c
+++ b/lib/librte_eal/common/eal_common_bus.c
@@ -172,6 +172,36 @@ rte_eal_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_eal_bus_scan(void)
+{
+ int ret;
+ struct rte_bus *bus = NULL;
+
+ TAILQ_FOREACH(bus, &rte_bus_list, next) {
+ ret = bus->scan(bus);
+ if (ret) {
+ RTE_LOG(ERR, EAL, "Scan for (%s) bus failed.\n",
+ bus->name);
+ /* TODO: Should error on a particular bus block scan
+ * for all others?
+ */
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* Match driver<->device and call driver->probe() */
+int
+rte_eal_bus_probe(void)
+{
+ /* Until driver->probe is available, this is dummy implementation */
+ return 0;
+}
+
/* dump one bus info */
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 da76db3..3bd3ab5 100644
--- a/lib/librte_eal/common/include/rte_bus.h
+++ b/lib/librte_eal/common/include/rte_bus.h
@@ -212,6 +212,25 @@ void rte_eal_bus_unregister(struct rte_bus *bus);
*/
struct rte_bus *rte_eal_bus_get(const char *bus_name);
+/** @internal
+ * Scan all the buses attached to the framework.
+ *
+ * @param void
+ * @return void
+ */
+int rte_eal_bus_scan(void);
+
+/** @internal
+ * For each device on the bus, perform a driver 'match' and call the
+ * driver's probe for device initialization.
+ *
+ * @param void
+ * @return
+ * 0 for successful match/probe
+ * !0 otherwise
+ */
+int rte_eal_bus_probe(void);
+
/**
* Dump information of all the buses registered with EAL.
*
diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c
index 16dd5b9..1a17891 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_eal_bus_scan())
+ rte_panic("Cannot scan the buses for devices\n");
+
RTE_LCORE_FOREACH_SLAVE(i) {
/*
@@ -884,6 +888,9 @@ rte_eal_init(int argc, char **argv)
if (rte_eal_pci_probe())
rte_panic("Cannot probe PCI\n");
+ if (rte_eal_bus_probe())
+ rte_panic("Cannot probe devices\n");
+
if (rte_eal_dev_init() < 0)
rte_panic("Cannot init pmd devices\n");
--
2.7.4