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authorDavid Kubicek <dave@awk.cz>2005-11-01 20:51:34 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2006-01-05 00:48:29 +0300
commit61a87adf2e7b410da8e41799c61c21a7b8c8b001 (patch)
treeb4d09ce45dadd78cd2b92848a96c508f44d12f88 /drivers/usb/class/cdc-acm.h
parent2e1dcc1600c1d83b26479edd076866595bbd3523 (diff)
downloadlinux-61a87adf2e7b410da8e41799c61c21a7b8c8b001.tar.xz
[PATCH] USB: Converting cdc acm to a ring queue
this patch by David converts the sending queue of the CDC ACM driver to a queue of URBs. This is needed for quicker devices. Please apply. Signed-Off-By: Oliver Neukum <oliver@neukum.name> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> drivers/usb/class/cdc-acm.c | 229 ++++++++++++++++++++++++++++++-------------- drivers/usb/class/cdc-acm.h | 33 +++++- 2 files changed, 185 insertions(+), 77 deletions(-)
Diffstat (limited to 'drivers/usb/class/cdc-acm.h')
-rw-r--r--drivers/usb/class/cdc-acm.h33
1 files changed, 28 insertions, 5 deletions
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index 963a5dfd2096..fd2aaccdcbac 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -59,6 +59,9 @@
* when processing onlcr, so we only need 2 buffers.
*/
#define ACM_NWB 2
+#define ACM_NRU 16
+#define ACM_NRB 16
+
struct acm_wb {
unsigned char *buf;
dma_addr_t dmah;
@@ -66,22 +69,43 @@ struct acm_wb {
int use;
};
+struct acm_rb {
+ struct list_head list;
+ int size;
+ unsigned char *base;
+ dma_addr_t dma;
+};
+
+struct acm_ru {
+ struct list_head list;
+ struct acm_rb *buffer;
+ struct urb *urb;
+ struct acm *instance;
+};
+
struct acm {
struct usb_device *dev; /* the corresponding usb device */
struct usb_interface *control; /* control interface */
struct usb_interface *data; /* data interface */
struct tty_struct *tty; /* the corresponding tty */
- struct urb *ctrlurb, *readurb, *writeurb; /* urbs */
- u8 *ctrl_buffer, *read_buffer; /* buffers of urbs */
- dma_addr_t ctrl_dma, read_dma; /* dma handles of buffers */
+ struct urb *ctrlurb, *writeurb; /* urbs */
+ u8 *ctrl_buffer; /* buffers of urbs */
+ dma_addr_t ctrl_dma; /* dma handles of buffers */
struct acm_wb wb[ACM_NWB];
+ struct acm_ru ru[ACM_NRU];
+ struct acm_rb rb[ACM_NRB];
+ int rx_endpoint;
+ spinlock_t read_lock;
+ struct list_head spare_read_urbs;
+ struct list_head spare_read_bufs;
+ struct list_head filled_read_bufs;
int write_current; /* current write buffer */
int write_used; /* number of non-empty write buffers */
int write_ready; /* write urb is not running */
spinlock_t write_lock;
struct usb_cdc_line_coding line; /* bits, stop, parity */
struct work_struct work; /* work queue entry for line discipline waking up */
- struct tasklet_struct bh; /* rx processing */
+ struct tasklet_struct urb_task; /* rx processing */
spinlock_t throttle_lock; /* synchronize throtteling and read callback */
unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
unsigned int ctrlout; /* output control lines (DTR, RTS) */
@@ -91,7 +115,6 @@ struct acm {
unsigned int minor; /* acm minor number */
unsigned char throttle; /* throttled by tty layer */
unsigned char clocal; /* termios CLOCAL */
- unsigned char resubmit_to_unthrottle; /* throtteling has disabled the read urb */
unsigned int ctrl_caps; /* control capabilities from the class specific header */
};