staging: nvec: Introduce new internal API for msg alloc/free

[karo-tx-linux.git] / drivers / staging / nvec / nvec.h

diff --git a/drivers/staging/nvec/nvec.h b/drivers/staging/nvec/nvec.h
index fe11225bcec101a2e7d2ae5e4af16d1a1aa6b70b..544080259e2c52fd14bb9a3457d3fba11a0b97a6 100644 (file)
--- a/drivers/staging/nvec/nvec.h
+++ b/drivers/staging/nvec/nvec.h
@@ -16,9 +16,13 @@
 #ifndef __LINUX_MFD_NVEC
 #define __LINUX_MFD_NVEC
 
+#include <linux/atomic.h>
 #include <linux/notifier.h>
 #include <linux/semaphore.h>
 
+/* NVEC_POOL_SIZE - Size of the pool in &struct nvec_msg */
+#define NVEC_POOL_SIZE 64
+
 typedef enum {
        NVEC_2BYTES,
        NVEC_3BYTES,
@@ -52,6 +56,7 @@ struct nvec_msg {
        unsigned short size;
        unsigned short pos;
        struct list_head node;
+       atomic_t used;
 };
 
 struct nvec_subdev {
@@ -78,6 +83,7 @@ struct nvec_chip {
        struct notifier_block nvec_status_notifier;
        struct work_struct rx_work, tx_work;
        struct nvec_msg *rx, *tx;
+       struct nvec_msg msg_pool[NVEC_POOL_SIZE];
 
        /* sync write stuff */
        struct semaphore sync_write_mutex;