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authorDaniel Martensson <daniel.martensson@stericsson.com>2011-10-13 13:29:25 +0200
committerDavid S. Miller <davem@davemloft.net>2011-10-19 09:25:41 +0200
commit687b13e98addc99644002703944ec89e94287cb6 (patch)
tree79ef989f2c8bc701edd31969751577ad81852193 /include
parentcaif-hsi: Fix for wakeup condition problem (diff)
downloadlinux-687b13e98addc99644002703944ec89e94287cb6.tar.xz
linux-687b13e98addc99644002703944ec89e94287cb6.zip
caif-hsi: Making read and writes asynchronous.
Some platforms do not allow to put HSI block into low-power mode when FIFO is not empty. The patch flushes (by reading) FIFO at wake down sequence. Asynchronous read and write is implemented for that. As a side effect this will also greatly improve performance. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/caif/caif_hsi.h29
1 files changed, 20 insertions, 9 deletions
diff --git a/include/net/caif/caif_hsi.h b/include/net/caif/caif_hsi.h
index c5dedd87b4cb..17dff451efe3 100644
--- a/include/net/caif/caif_hsi.h
+++ b/include/net/caif/caif_hsi.h
@@ -75,18 +75,21 @@ struct cfhsi_desc {
#define CFHSI_WAKE_UP_ACK 1
#define CFHSI_WAKE_DOWN_ACK 2
#define CFHSI_AWAKE 3
-#define CFHSI_PENDING_RX 4
-#define CFHSI_SHUTDOWN 6
-#define CFHSI_FLUSH_FIFO 7
+#define CFHSI_WAKELOCK_HELD 4
+#define CFHSI_SHUTDOWN 5
+#define CFHSI_FLUSH_FIFO 6
#ifndef CFHSI_INACTIVITY_TOUT
#define CFHSI_INACTIVITY_TOUT (1 * HZ)
#endif /* CFHSI_INACTIVITY_TOUT */
-#ifndef CFHSI_WAKEUP_TOUT
-#define CFHSI_WAKEUP_TOUT (3 * HZ)
-#endif /* CFHSI_WAKEUP_TOUT */
+#ifndef CFHSI_WAKE_TOUT
+#define CFHSI_WAKE_TOUT (3 * HZ)
+#endif /* CFHSI_WAKE_TOUT */
+#ifndef CFHSI_MAX_RX_RETRIES
+#define CFHSI_MAX_RX_RETRIES (10 * HZ)
+#endif
/* Structure implemented by the CAIF HSI driver. */
struct cfhsi_drv {
@@ -109,6 +112,15 @@ struct cfhsi_dev {
struct cfhsi_drv *drv;
};
+/* Structure holds status of received CAIF frames processing */
+struct cfhsi_rx_state {
+ int state;
+ int nfrms;
+ int pld_len;
+ int retries;
+ bool piggy_desc;
+};
+
/* Structure implemented by CAIF HSI drivers. */
struct cfhsi {
struct caif_dev_common cfdev;
@@ -118,7 +130,7 @@ struct cfhsi {
struct cfhsi_drv drv;
struct cfhsi_dev *dev;
int tx_state;
- int rx_state;
+ struct cfhsi_rx_state rx_state;
int rx_len;
u8 *rx_ptr;
u8 *tx_buf;
@@ -130,13 +142,12 @@ struct cfhsi {
struct list_head list;
struct work_struct wake_up_work;
struct work_struct wake_down_work;
- struct work_struct rx_done_work;
- struct work_struct tx_done_work;
struct workqueue_struct *wq;
wait_queue_head_t wake_up_wait;
wait_queue_head_t wake_down_wait;
wait_queue_head_t flush_fifo_wait;
struct timer_list timer;
+ struct timer_list rx_slowpath_timer;
unsigned long bits;
};