[dpdk-dev] [PATCH v9 01/12] eal/linux: add interrupt vectors support in intr_handle

[Cunming Liang]

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.
When the event fds add to a specified epoll instance, 'eptrs' will hold the 
rte_epoll_event object pointer.

Signed-off-by: Danny Zhou <danny.zhou at intel.com>
Signed-off-by: Cunming Liang <cunming.liang at intel.com>
---
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.

 lib/librte_eal/linuxapp/eal/include/exec-env/rte_interrupts.h | 10 ++++++++++
 1 file changed, 10 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..9c86a15 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 */
@@ -49,6 +51,8 @@ enum rte_intr_handle_type {
        RTE_INTR_HANDLE_MAX
 };

+struct rte_epoll_event;
+
 /** Handle for interrupts. */
 struct rte_intr_handle {
        union {
@@ -58,6 +62,12 @@ struct rte_intr_handle {
        };
        int fd;  /**< interrupt event file descriptor */
        enum rte_intr_handle_type type;  /**< handle type */
+       uint32_t max_intr;               /**< max interrupt requested */
+       uint32_t nb_efd;                 /**< number of available efds */
+       int efds[RTE_MAX_RXTX_INTR_VEC_ID];  /**< intr vectors/efds mapping */
+       struct rte_epoll_event *elist[RTE_MAX_RXTX_INTR_VEC_ID];
+                                        /**< intr vector epoll event ptr */
+       int *intr_vec;                   /**< intr vector number array */
 };

 #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */
-- 
1.8.1.4