[dpdk-dev] [PATCH v14 01/13] eal/linux: add interrupt vectors support in intr_handle

Cunming Liang cunming.liang at intel.com
Fri Jul 17 08:16:03 CEST 2015


The patch adds interrupt vectors support in rte_intr_handle.
'vec_en' is set when interrupt vectors are detected and associated event fds are set.
Those event fds are stored in efds[].
'intr_vec' is reserved for device driver to initialize the vector mapping table.

Signed-off-by: Danny Zhou <danny.zhou at intel.com>
Signed-off-by: Cunming Liang <cunming.liang at intel.com>
---
v14 changes
 - per-patch basis ABI compatibility rework

v7 changes:
 - add eptrs[], it's used to store the register rte_epoll_event instances.
 - add vec_en, to log the vector capability status.

v6 changes:
 - add mapping table between irq vector number and queue id.

v5 changes:
 - Create this new patch file for changed struct rte_intr_handle that
   other patches depend on, to avoid breaking git bisect.

 .../linuxapp/eal/include/exec-env/rte_interrupts.h          | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h
index bdeb3fc..12b33c9 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h
@@ -38,6 +38,8 @@
 #ifndef _RTE_LINUXAPP_INTERRUPTS_H_
 #define _RTE_LINUXAPP_INTERRUPTS_H_
 
+#define RTE_MAX_RXTX_INTR_VEC_ID     32
+
 enum rte_intr_handle_type {
 	RTE_INTR_HANDLE_UNKNOWN = 0,
 	RTE_INTR_HANDLE_UIO,          /**< uio device handle */
@@ -58,6 +60,17 @@ struct rte_intr_handle {
 	};
 	int fd;	 /**< interrupt event file descriptor */
 	enum rte_intr_handle_type type;  /**< handle type */
+#ifdef RTE_NEXT_ABI
+	/**
+	 * RTE_NEXT_ABI will be removed from v2.2.
+	 * It's only used to avoid ABI(unannounced) broken in v2.1.
+	 * Make sure being aware of the impact before turning on the feature.
+	 */
+	uint32_t max_intr;             /**< max interrupt requested */
+	uint32_t nb_efd;               /**< number of available efd(event fd) */
+	int efds[RTE_MAX_RXTX_INTR_VEC_ID];  /**< intr vectors/efds mapping */
+	int *intr_vec;                 /**< intr vector number array */
+#endif
 };
 
 #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */
-- 
1.8.1.4



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