[2.5 PATCH] USB speedtouch: add module parameters

From: Duncan Sands (baldrick@wanadoo.fr)
Date: Mon Jun 16 2003 - 02:45:10 EST


 speedtch.c | 109 ++++++++++++++++++++++++++++++++++++++++---------------------
 1 files changed, 73 insertions(+), 36 deletions(-)

diff -Nru a/drivers/usb/misc/speedtch.c b/drivers/usb/misc/speedtch.c
--- a/drivers/usb/misc/speedtch.c Mon Jun 16 09:35:26 2003
+++ b/drivers/usb/misc/speedtch.c Mon Jun 16 09:35:26 2003
@@ -61,6 +61,7 @@
 
 #include <asm/semaphore.h>
 #include <linux/module.h>
+#include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/timer.h>
@@ -102,12 +103,43 @@
 #define SPEEDTOUCH_VENDORID 0x06b9
 #define SPEEDTOUCH_PRODUCTID 0x4061
 
-#define UDSL_NUM_RCV_URBS 1
-#define UDSL_NUM_SND_URBS 1
-#define UDSL_NUM_RCV_BUFS (2*UDSL_NUM_RCV_URBS)
-#define UDSL_NUM_SND_BUFS (2*UDSL_NUM_SND_URBS)
-#define UDSL_RCV_BUF_SIZE 32 /* ATM cells */
-#define UDSL_SND_BUF_SIZE 64 /* ATM cells */
+#define UDSL_MAX_RCV_URBS 4
+#define UDSL_MAX_SND_URBS 4
+#define UDSL_MAX_RCV_BUFS 8
+#define UDSL_MAX_SND_BUFS 8
+#define UDSL_MAX_RCV_BUF_SIZE 1024 /* ATM cells */
+#define UDSL_MAX_SND_BUF_SIZE 1024 /* ATM cells */
+#define UDSL_DEFAULT_RCV_URBS 1
+#define UDSL_DEFAULT_SND_URBS 1
+#define UDSL_DEFAULT_RCV_BUFS 2
+#define UDSL_DEFAULT_SND_BUFS 2
+#define UDSL_DEFAULT_RCV_BUF_SIZE 64 /* ATM cells */
+#define UDSL_DEFAULT_SND_BUF_SIZE 64 /* ATM cells */
+
+static unsigned int num_rcv_urbs = UDSL_DEFAULT_RCV_URBS;
+static unsigned int num_snd_urbs = UDSL_DEFAULT_SND_URBS;
+static unsigned int num_rcv_bufs = UDSL_DEFAULT_RCV_BUFS;
+static unsigned int num_snd_bufs = UDSL_DEFAULT_SND_BUFS;
+static unsigned int rcv_buf_size = UDSL_DEFAULT_RCV_BUF_SIZE;
+static unsigned int snd_buf_size = UDSL_DEFAULT_SND_BUF_SIZE;
+
+module_param (num_rcv_urbs, uint, 0444);
+MODULE_PARM_DESC (num_rcv_urbs, "Number of urbs used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_URBS) ")");
+
+module_param (num_snd_urbs, uint, 0444);
+MODULE_PARM_DESC (num_snd_urbs, "Number of urbs used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_URBS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_URBS) ")");
+
+module_param (num_rcv_bufs, uint, 0444);
+MODULE_PARM_DESC (num_rcv_bufs, "Number of buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUFS) ")");
+
+module_param (num_snd_bufs, uint, 0444);
+MODULE_PARM_DESC (num_snd_bufs, "Number of buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUFS) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUFS) ")");
+
+module_param (rcv_buf_size, uint, 0444);
+MODULE_PARM_DESC (rcv_buf_size, "Size of the buffers used for reception (range: 0-" __MODULE_STRING (UDSL_MAX_RCV_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_RCV_BUF_SIZE) ")");
+
+module_param (snd_buf_size, uint, 0444);
+MODULE_PARM_DESC (snd_buf_size, "Size of the buffers used for transmission (range: 0-" __MODULE_STRING (UDSL_MAX_SND_BUF_SIZE) ", default: " __MODULE_STRING (UDSL_DEFAULT_SND_BUF_SIZE) ")");
 
 #define UDSL_IOCTL_LINE_UP 1
 #define UDSL_IOCTL_LINE_DOWN 2
@@ -196,8 +228,8 @@
         struct list_head vcc_list;
 
         /* receive */
- struct udsl_receiver receivers [UDSL_NUM_RCV_URBS];
- struct udsl_receive_buffer receive_buffers [UDSL_NUM_RCV_BUFS];
+ struct udsl_receiver receivers [UDSL_MAX_RCV_URBS];
+ struct udsl_receive_buffer receive_buffers [UDSL_MAX_RCV_BUFS];
 
         spinlock_t receive_lock;
         struct list_head spare_receivers;
@@ -207,8 +239,8 @@
         struct list_head spare_receive_buffers;
 
         /* send */
- struct udsl_sender senders [UDSL_NUM_SND_URBS];
- struct udsl_send_buffer send_buffers [UDSL_NUM_SND_BUFS];
+ struct udsl_sender senders [UDSL_MAX_SND_URBS];
+ struct udsl_send_buffer send_buffers [UDSL_MAX_SND_BUFS];
 
         struct sk_buff_head sndqueue;
 
@@ -503,7 +535,7 @@
 
         vdbg ("udsl_complete_receive: urb 0x%p, status %d, actual_length %d, filled_cells %u, rcv 0x%p, buf 0x%p", urb, urb->status, urb->actual_length, buf->filled_cells, rcv, buf);
 
- BUG_ON (buf->filled_cells > UDSL_RCV_BUF_SIZE);
+ BUG_ON (buf->filled_cells > rcv_buf_size);
 
         /* may not be in_interrupt() */
         spin_lock_irqsave (&instance->receive_lock, flags);
@@ -541,7 +573,7 @@
                                    instance->usb_dev,
                                    usb_rcvbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_IN),
                                    buf->base,
- UDSL_RCV_BUF_SIZE * ATM_CELL_SIZE,
+ rcv_buf_size * ATM_CELL_SIZE,
                                    udsl_complete_receive,
                                    rcv);
 
@@ -626,11 +658,11 @@
                                    instance->usb_dev,
                                    usb_sndbulkpipe (instance->usb_dev, UDSL_ENDPOINT_DATA_OUT),
                                    buf->base,
- (UDSL_SND_BUF_SIZE - buf->free_cells) * ATM_CELL_SIZE,
+ (snd_buf_size - buf->free_cells) * ATM_CELL_SIZE,
                                    udsl_complete_send,
                                    snd);
 
- vdbg ("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p", snd->urb, UDSL_SND_BUF_SIZE - buf->free_cells, snd, buf);
+ vdbg ("udsl_process_send: submitting urb 0x%p (%d cells), snd 0x%p, buf 0x%p", snd->urb, snd_buf_size - buf->free_cells, snd, buf);
 
                 if ((err = usb_submit_urb(snd->urb, GFP_ATOMIC)) < 0) {
                         dbg ("udsl_process_send: urb submission failed (%d)!", err);
@@ -662,7 +694,7 @@
                 spin_unlock_irq (&instance->send_lock);
 
                 buf->free_start = buf->base;
- buf->free_cells = UDSL_SND_BUF_SIZE;
+ buf->free_cells = snd_buf_size;
 
                 instance->current_buffer = buf;
         }
@@ -676,7 +708,7 @@
                 instance->current_buffer = NULL;
         }
 
- vdbg ("udsl_process_send: buffer contains %d cells, %d left", UDSL_SND_BUF_SIZE - buf->free_cells, buf->free_cells);
+ vdbg ("udsl_process_send: buffer contains %d cells, %d left", snd_buf_size - buf->free_cells, buf->free_cells);
 
         if (!UDSL_SKB (skb)->num_cells) {
                 struct atm_vcc *vcc = UDSL_SKB (skb)->atm_data.vcc;
@@ -1039,7 +1071,7 @@
         INIT_LIST_HEAD (&instance->filled_send_buffers);
 
         /* receive init */
- for (i = 0; i < UDSL_NUM_RCV_URBS; i++) {
+ for (i = 0; i < num_rcv_urbs; i++) {
                 struct udsl_receiver *rcv = &(instance->receivers [i]);
 
                 if (!(rcv->urb = usb_alloc_urb (0, GFP_KERNEL))) {
@@ -1052,10 +1084,10 @@
                 list_add (&rcv->list, &instance->spare_receivers);
         }
 
- for (i = 0; i < UDSL_NUM_RCV_BUFS; i++) {
+ for (i = 0; i < num_rcv_bufs; i++) {
                 struct udsl_receive_buffer *buf = &(instance->receive_buffers [i]);
 
- if (!(buf->base = kmalloc (UDSL_RCV_BUF_SIZE * ATM_CELL_SIZE, GFP_KERNEL))) {
+ if (!(buf->base = kmalloc (rcv_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) {
                         dbg ("udsl_usb_probe: no memory for receive buffer %d!", i);
                         goto fail;
                 }
@@ -1064,7 +1096,7 @@
         }
 
         /* send init */
- for (i = 0; i < UDSL_NUM_SND_URBS; i++) {
+ for (i = 0; i < num_snd_urbs; i++) {
                 struct udsl_sender *snd = &(instance->senders [i]);
 
                 if (!(snd->urb = usb_alloc_urb (0, GFP_KERNEL))) {
@@ -1077,10 +1109,10 @@
                 list_add (&snd->list, &instance->spare_senders);
         }
 
- for (i = 0; i < UDSL_NUM_SND_BUFS; i++) {
+ for (i = 0; i < num_snd_bufs; i++) {
                 struct udsl_send_buffer *buf = &(instance->send_buffers [i]);
 
- if (!(buf->base = kmalloc (UDSL_SND_BUF_SIZE * ATM_CELL_SIZE, GFP_KERNEL))) {
+ if (!(buf->base = kmalloc (snd_buf_size * ATM_CELL_SIZE, GFP_KERNEL))) {
                         dbg ("udsl_usb_probe: no memory for send buffer %d!", i);
                         goto fail;
                 }
@@ -1139,16 +1171,16 @@
         return 0;
 
 fail:
- for (i = 0; i < UDSL_NUM_SND_BUFS; i++)
+ for (i = 0; i < num_snd_bufs; i++)
                 kfree (instance->send_buffers [i].base);
 
- for (i = 0; i < UDSL_NUM_SND_URBS; i++)
+ for (i = 0; i < num_snd_urbs; i++)
                 usb_free_urb (instance->senders [i].urb);
 
- for (i = 0; i < UDSL_NUM_RCV_BUFS; i++)
+ for (i = 0; i < num_rcv_bufs; i++)
                 kfree (instance->receive_buffers [i].base);
 
- for (i = 0; i < UDSL_NUM_RCV_URBS; i++)
+ for (i = 0; i < num_rcv_urbs; i++)
                 usb_free_urb (instance->receivers [i].urb);
 
         kfree (instance);
@@ -1175,7 +1207,7 @@
         /* receive finalize */
         tasklet_disable (&instance->receive_tasklet);
 
- for (i = 0; i < UDSL_NUM_RCV_URBS; i++)
+ for (i = 0; i < num_rcv_urbs; i++)
                 if ((result = usb_unlink_urb (instance->receivers [i].urb)) < 0)
                         dbg ("udsl_usb_disconnect: usb_unlink_urb on receive urb %d returned %d", i, result);
 
@@ -1184,13 +1216,13 @@
                 count = 0;
                 spin_lock_irq (&instance->receive_lock);
                 list_for_each (pos, &instance->spare_receivers)
- if (++count > UDSL_NUM_RCV_URBS)
+ if (++count > num_rcv_urbs)
                                 panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__);
                 spin_unlock_irq (&instance->receive_lock);
 
                 dbg ("udsl_usb_disconnect: found %u spare receivers", count);
 
- if (count == UDSL_NUM_RCV_URBS)
+ if (count == num_rcv_urbs)
                         break;
 
                 set_current_state (TASK_RUNNING);
@@ -1203,16 +1235,16 @@
 
         tasklet_enable (&instance->receive_tasklet);
 
- for (i = 0; i < UDSL_NUM_RCV_URBS; i++)
+ for (i = 0; i < num_rcv_urbs; i++)
                 usb_free_urb (instance->receivers [i].urb);
 
- for (i = 0; i < UDSL_NUM_RCV_BUFS; i++)
+ for (i = 0; i < num_rcv_bufs; i++)
                 kfree (instance->receive_buffers [i].base);
 
         /* send finalize */
         tasklet_disable (&instance->send_tasklet);
 
- for (i = 0; i < UDSL_NUM_SND_URBS; i++)
+ for (i = 0; i < num_snd_urbs; i++)
                 if ((result = usb_unlink_urb (instance->senders [i].urb)) < 0)
                         dbg ("udsl_usb_disconnect: usb_unlink_urb on send urb %d returned %d", i, result);
 
@@ -1221,13 +1253,13 @@
                 count = 0;
                 spin_lock_irq (&instance->send_lock);
                 list_for_each (pos, &instance->spare_senders)
- if (++count > UDSL_NUM_SND_URBS)
+ if (++count > num_snd_urbs)
                                 panic (__FILE__ ": memory corruption detected at line %d!\n", __LINE__);
                 spin_unlock_irq (&instance->send_lock);
 
                 dbg ("udsl_usb_disconnect: found %u spare senders", count);
 
- if (count == UDSL_NUM_SND_URBS)
+ if (count == num_snd_urbs)
                         break;
 
                 set_current_state (TASK_RUNNING);
@@ -1241,10 +1273,10 @@
 
         tasklet_enable (&instance->send_tasklet);
 
- for (i = 0; i < UDSL_NUM_SND_URBS; i++)
+ for (i = 0; i < num_snd_urbs; i++)
                 usb_free_urb (instance->senders [i].urb);
 
- for (i = 0; i < UDSL_NUM_SND_BUFS; i++)
+ for (i = 0; i < num_snd_bufs; i++)
                 kfree (instance->send_buffers [i].base);
 
         wmb ();
@@ -1269,6 +1301,11 @@
                 printk (KERN_ERR __FILE__ ": unusable with this kernel!\n");
                 return -EIO;
         }
+
+ if ((num_rcv_urbs > UDSL_MAX_RCV_URBS) || (num_snd_urbs > UDSL_MAX_SND_URBS) ||
+ (num_rcv_bufs > UDSL_MAX_RCV_BUFS) || (num_snd_bufs > UDSL_MAX_SND_BUFS) ||
+ (rcv_buf_size > UDSL_MAX_RCV_BUF_SIZE) || (snd_buf_size > UDSL_MAX_SND_BUF_SIZE))
+ return -EINVAL;
 
         return usb_register (&udsl_usb_driver);
 }

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This archive was generated by hypermail 2b29 : Mon Jun 23 2003 - 22:00:17 EST