diff options
| author | Daniel Martensson <daniel.martensson@stericsson.com> | 2011-10-13 11:29:25 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-10-19 03:25:41 -0400 |
| commit | 687b13e98addc99644002703944ec89e94287cb6 (patch) | |
| tree | 79ef989f2c8bc701edd31969751577ad81852193 /include/net/caif | |
| parent | 73033c987a8bd0b080509063bb7c130b8941ad73 (diff) | |
| download | linux-687b13e98addc99644002703944ec89e94287cb6.tar.bz2 | |
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/net/caif')
| -rw-r--r-- | include/net/caif/caif_hsi.h | 29 |
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; }; |