[dpdk-dev] [PATCH v11 06/24] eal: introduce PCI device init macros

[Shreyansh Jain]

From: David Marchand <david.march...@6wind.com>

Introduce a RTE_INIT macro used to mark an init function as a constructor.
Current eal macros have been converted to use this (no functional impact).
DRIVER_REGISTER_PCI is added as a helper for pci drivers.

Suggested-by: Jan Viktorin <viktorin at rehivetech.com>
Signed-off-by: David Marchand <david.marchand at 6wind.com>
[Shreyansh: Update PCI Registration macro name]
Signed-off-by: Shreyansh Jain <shreyansh.jain at nxp.com>
---
 lib/librte_eal/common/include/rte_dev.h   |  4 ++--
 lib/librte_eal/common/include/rte_eal.h   |  3 +++
 lib/librte_eal/common/include/rte_pci.h   | 10 ++++++++++
 lib/librte_eal/common/include/rte_tailq.h |  4 ++--
 4 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/lib/librte_eal/common/include/rte_dev.h 
b/lib/librte_eal/common/include/rte_dev.h
index 8233a2a..94ae14e 100644
--- a/lib/librte_eal/common/include/rte_dev.h
+++ b/lib/librte_eal/common/include/rte_dev.h
@@ -185,8 +185,8 @@ static const char DRIVER_EXPORT_NAME_ARRAY(this_pmd_name, 
idx) \
 __attribute__((used)) = RTE_STR(name)

 #define PMD_REGISTER_DRIVER(drv, nm)\
-void probefn_ ##drv(void);\
-void __attribute__((constructor, used)) probefn_ ##drv(void)\
+RTE_INIT(probefn_ ##drv);\
+static void probefn_ ##drv(void)\
 {\
        (drv).name = RTE_STR(nm);\
        rte_eal_driver_register(&drv);\
diff --git a/lib/librte_eal/common/include/rte_eal.h 
b/lib/librte_eal/common/include/rte_eal.h
index 98d20db..d150b9d 100644
--- a/lib/librte_eal/common/include/rte_eal.h
+++ b/lib/librte_eal/common/include/rte_eal.h
@@ -253,6 +253,9 @@ static inline int rte_gettid(void)
        return RTE_PER_LCORE(_thread_id);
 }

+#define RTE_INIT(func) \
+static void __attribute__((constructor, used)) func(void)
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/lib/librte_eal/common/include/rte_pci.h 
b/lib/librte_eal/common/include/rte_pci.h
index 803c78a..cf81898 100644
--- a/lib/librte_eal/common/include/rte_pci.h
+++ b/lib/librte_eal/common/include/rte_pci.h
@@ -470,6 +470,16 @@ void rte_eal_pci_dump(FILE *f);
  */
 void rte_eal_pci_register(struct rte_pci_driver *driver);

+/** Helper for PCI device registration from driver (eth, crypto) instance */
+#define DRIVER_REGISTER_PCI(nm, pci_drv) \
+RTE_INIT(pciinitfn_ ##nm); \
+static void pciinitfn_ ##nm(void) \
+{\
+       (pci_drv).name = RTE_STR(nm);\
+       rte_eal_pci_register(&pci_drv); \
+} \
+DRIVER_EXPORT_NAME(nm, __COUNTER__)
+
 /**
  * Unregister a PCI driver.
  *
diff --git a/lib/librte_eal/common/include/rte_tailq.h 
b/lib/librte_eal/common/include/rte_tailq.h
index cc3c0f1..cc386e4 100644
--- a/lib/librte_eal/common/include/rte_tailq.h
+++ b/lib/librte_eal/common/include/rte_tailq.h
@@ -148,8 +148,8 @@ struct rte_tailq_head *rte_eal_tailq_lookup(const char 
*name);
 int rte_eal_tailq_register(struct rte_tailq_elem *t);

 #define EAL_REGISTER_TAILQ(t) \
-void tailqinitfn_ ##t(void); \
-void __attribute__((constructor, used)) tailqinitfn_ ##t(void) \
+RTE_INIT(tailqinitfn_ ##t); \
+static void tailqinitfn_ ##t(void) \
 { \
        if (rte_eal_tailq_register(&t) < 0) \
                rte_panic("Cannot initialize tailq: %s\n", t.name); \
-- 
2.7.4