Remove dead code from sarlib, reorganize live sarlib code (trivial transformations).
speedtch.c | 312 +++++++++++++++++++------------------------------------------
1 files changed, 100 insertions(+), 212 deletions(-)
diff -Nru a/drivers/usb/misc/speedtch.c b/drivers/usb/misc/speedtch.c
--- a/drivers/usb/misc/speedtch.c Mon Mar 24 12:13:27 2003
+++ b/drivers/usb/misc/speedtch.c Mon Mar 24 12:13:27 2003
@@ -151,21 +151,13 @@
struct atmsar_vcc_data {
struct atmsar_vcc_data *next;
- /* general atmsar flags, per connection */
- int flags;
- int type;
-
/* connection specific non-atmsar data */
struct atm_vcc *vcc;
- struct k_atm_aal_stats *stats;
unsigned short mtu; /* max is actually 65k for AAL5... */
/* cell data */
unsigned int vp;
unsigned int vc;
- unsigned char gfc;
- unsigned char pti;
- unsigned int headerFlags;
unsigned long atmHeader;
/* raw cell reassembly */
@@ -259,7 +251,6 @@
*************/
#define ATM_HDR_VPVC_MASK (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)
-#define ATMSAR_USE_53BYTE_CELL 0x1L
struct sk_buff *atmsar_decode_rawcell (struct atmsar_vcc_data *list, struct sk_buff
*skb,
struct atmsar_vcc_data **ctx)
@@ -292,85 +283,49 @@
(int) ((atmHeader & ATM_HDR_VPI_MASK) >> ATM_HDR_VPI_SHIFT),
(int) ((atmHeader & ATM_HDR_VCI_MASK) >> ATM_HDR_VCI_SHIFT));
- if (vcc && (skb->len >= (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 :
52))) {
- cell_payload = cell + (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 5
: 4);
+ if (vcc && (skb->len >= 53)) {
+ cell_payload = cell + 5;
- switch (vcc->type) {
- case ATM_AAL0:
- /* case ATM_AAL1: when we have a decode AAL1
function... */
- {
- struct sk_buff *tmp = dev_alloc_skb (vcc->mtu);
-
- if (tmp) {
- memcpy (tmp->tail, cell_payload, 48);
- skb_put (tmp, 48);
-
- if (vcc->stats)
- atomic_inc (&vcc->stats->rx);
-
- skb_pull (skb,
- (vcc->
- flags &
ATMSAR_USE_53BYTE_CELL ? 53 :
- 52));
- dbg
- ("atmsar_decode_rawcell returns
ATM_AAL0 pdu 0x%p with length %d",
- tmp, tmp->len);
- return tmp;
- };
- }
- break;
- case ATM_AAL1:
- case ATM_AAL2:
- case ATM_AAL34:
- /* not supported */
- break;
- case ATM_AAL5:
- if (!vcc->reasBuffer)
- vcc->reasBuffer = dev_alloc_skb (vcc->mtu);
-
- /* if alloc fails, we just drop the cell. it is
possible that we can still
- * receive cells on other vcc's
- */
- if (vcc->reasBuffer) {
- /* if (buffer overrun) discard received cells
until now */
- if ((vcc->reasBuffer->len) > (vcc->mtu - 48))
- skb_trim (vcc->reasBuffer, 0);
-
- /* copy data */
- memcpy (vcc->reasBuffer->tail, cell_payload,
48);
- skb_put (vcc->reasBuffer, 48);
-
- /* check for end of buffer */
- if (cell[3] & 0x2) {
- struct sk_buff *tmp;
-
- /* the aal5 buffer ends here, cut the
buffer. */
- /* buffer will always have at least
one whole cell, so */
- /* don't need to check return from
skb_pull */
- skb_pull (skb,
- (vcc->
- flags &
ATMSAR_USE_53BYTE_CELL ? 53 :
- 52));
- *ctx = vcc;
- tmp = vcc->reasBuffer;
- vcc->reasBuffer = NULL;
+ if (!vcc->reasBuffer)
+ vcc->reasBuffer = dev_alloc_skb (vcc->mtu);
- dbg
- ("atmsar_decode_rawcell returns
ATM_AAL5 pdu 0x%p with length %d",
- tmp, tmp->len);
- return tmp;
- }
+ /* if alloc fails, we just drop the cell. it is possible that
we can still
+ * receive cells on other vcc's
+ */
+ if (vcc->reasBuffer) {
+ /* if (buffer overrun) discard received cells until
now */
+ if ((vcc->reasBuffer->len) > (vcc->mtu - 48))
+ skb_trim (vcc->reasBuffer, 0);
+
+ /* copy data */
+ memcpy (vcc->reasBuffer->tail, cell_payload, 48);
+ skb_put (vcc->reasBuffer, 48);
+
+ /* check for end of buffer */
+ if (cell[3] & 0x2) {
+ struct sk_buff *tmp;
+
+ /* the aal5 buffer ends here, cut the buffer.
*/
+ /* buffer will always have at least one whole
cell, so */
+ /* don't need to check return from skb_pull */
+ skb_pull (skb, 53);
+ *ctx = vcc;
+ tmp = vcc->reasBuffer;
+ vcc->reasBuffer = NULL;
+
+ dbg
+ ("atmsar_decode_rawcell returns ATM_AAL5
pdu 0x%p with length %d",
+ tmp, tmp->len);
+ return tmp;
}
- break;
- };
+ }
/* flush the cell */
/* buffer will always contain at least one whole cell, so
don't */
/* need to check return value from skb_pull */
- skb_pull (skb, (vcc->flags & ATMSAR_USE_53BYTE_CELL ? 53 :
52));
+ skb_pull (skb, 53);
} else {
/* If data is corrupt and skb doesn't hold a whole cell, flush
the lot */
- if (skb_pull (skb, (list->flags & ATMSAR_USE_53BYTE_CELL ? 53
: 52)) ==
- NULL)
+ if (skb_pull (skb, 53) == NULL)
return NULL;
}
}
@@ -398,8 +353,8 @@
/* is skb long enough ? */
if (skb->len < pdu_length) {
- if (ctx->stats)
- atomic_inc (&ctx->stats->rx_err);
+ if (ctx->vcc->stats)
+ atomic_inc (&ctx->vcc->stats->rx_err);
return NULL;
}
@@ -419,8 +374,8 @@
/* check crc */
if (pdu_crc != crc) {
dbg ("atmsar_decode_aal5: crc check failed!");
- if (ctx->stats)
- atomic_inc (&ctx->stats->rx_err);
+ if (ctx->vcc->stats)
+ atomic_inc (&ctx->vcc->stats->rx_err);
return NULL;
}
@@ -428,8 +383,8 @@
skb_trim (skb, length);
/* update stats */
- if (ctx->stats)
- atomic_inc (&ctx->stats->rx);
+ if (ctx->vcc->stats)
+ atomic_inc (&ctx->vcc->stats->rx);
dbg ("atmsar_decode_aal5 returns pdu 0x%p with length %d", skb, skb->len);
return skb;
@@ -602,35 +557,25 @@
&atmsar_vcc)) != NULL) {
dbg ("(after cell processing)skb->len = %d", new->len);
- switch (atmsar_vcc->type) {
- case ATM_AAL5:
- tmp = new;
- new = atmsar_decode_aal5 (atmsar_vcc, new);
-
- /* we can't send NULL skbs upstream, the ATM
layer would try to close the vcc... */
- if (new) {
- dbg ("(after aal5 decap) skb->len =
%d", new->len);
- if (new->len && atm_charge
(atmsar_vcc->vcc, new->truesize)) {
- PACKETDEBUG (new->data,
new->len);
- atmsar_vcc->vcc->push
(atmsar_vcc->vcc, new);
- } else {
- dbg
- ("dropping incoming packet
: rx_inuse = %d, vcc->sk->rcvbuf = %d, skb->true_size = %d",
- atomic_read
(&atmsar_vcc->vcc->rx_inuse),
-
atmsar_vcc->vcc->sk->rcvbuf, new->truesize);
- dev_kfree_skb (new);
- }
+ tmp = new;
+ new = atmsar_decode_aal5 (atmsar_vcc, new);
+
+ /* we can't send NULL skbs upstream, the ATM layer
would try to close the vcc... */
+ if (new) {
+ dbg ("(after aal5 decap) skb->len = %d",
new->len);
+ if (new->len && atm_charge (atmsar_vcc->vcc,
new->truesize)) {
+ PACKETDEBUG (new->data, new->len);
+ atmsar_vcc->vcc->push
(atmsar_vcc->vcc, new);
} else {
- dbg ("atmsar_decode_aal5 returned
NULL!");
- dev_kfree_skb (tmp);
+ dbg
+ ("dropping incoming packet :
rx_inuse = %d, vcc->sk->rcvbuf = %d, skb->true_size = %d",
+ atomic_read
(&atmsar_vcc->vcc->rx_inuse),
+ atmsar_vcc->vcc->sk->rcvbuf,
new->truesize);
+ dev_kfree_skb (new);
}
- break;
- default:
- /* not supported. we delete the skb. */
- printk (KERN_INFO
- "SpeedTouch USB: illegal vcc type.
Dropping packet.\n");
- dev_kfree_skb (new);
- break;
+ } else {
+ dbg ("atmsar_decode_aal5 returned NULL!");
+ dev_kfree_skb (tmp);
}
}
@@ -901,95 +846,6 @@
** ATM **
**********/
-#define ATMSAR_DEF_MTU_AAL0 48
-#define ATMSAR_DEF_MTU_AAL1 47
-#define ATMSAR_DEF_MTU_AAL2 0 /* not supported */
-#define ATMSAR_DEF_MTU_AAL34 0 /* not supported */
-#define ATMSAR_DEF_MTU_AAL5 65535 /* max mtu .. */
-
-struct atmsar_vcc_data *atmsar_open (struct atmsar_vcc_data **list, struct atm_vcc
*vcc, uint type,
- ushort vpi, ushort vci, unchar pti, unchar gfc,
uint flags)
-{
- struct atmsar_vcc_data *new;
-
- if (!vcc)
- return NULL;
-
- new = kmalloc (sizeof (struct atmsar_vcc_data), GFP_KERNEL);
-
- if (!new)
- return NULL;
-
- memset (new, 0, sizeof (struct atmsar_vcc_data));
- new->vcc = vcc;
- new->stats = vcc->stats;
- new->type = type;
- new->next = NULL;
- new->gfc = gfc;
- new->vp = vpi;
- new->vc = vci;
- new->pti = pti;
-
- switch (type) {
- case ATM_AAL0:
- new->mtu = ATMSAR_DEF_MTU_AAL0;
- break;
- case ATM_AAL1:
- new->mtu = ATMSAR_DEF_MTU_AAL1;
- break;
- case ATM_AAL2:
- new->mtu = ATMSAR_DEF_MTU_AAL2;
- break;
- case ATM_AAL34:
- /* not supported */
- new->mtu = ATMSAR_DEF_MTU_AAL34;
- break;
- case ATM_AAL5:
- new->mtu = ATMSAR_DEF_MTU_AAL5;
- break;
- }
-
- new->atmHeader = ((unsigned long) gfc << ATM_HDR_GFC_SHIFT)
- | ((unsigned long) vpi << ATM_HDR_VPI_SHIFT)
- | ((unsigned long) vci << ATM_HDR_VCI_SHIFT)
- | ((unsigned long) pti << ATM_HDR_PTI_SHIFT);
- new->flags = flags;
- new->next = NULL;
- new->reasBuffer = NULL;
-
- new->next = *list;
- *list = new;
-
- dbg ("Allocated new SARLib vcc 0x%p with vp %d vc %d", new, vpi, vci);
-
- return new;
-}
-
-void atmsar_close (struct atmsar_vcc_data **list, struct atmsar_vcc_data *vcc)
-{
- struct atmsar_vcc_data *work;
-
- if (*list == vcc) {
- *list = (*list)->next;
- } else {
- for (work = *list; work && work->next && (work->next != vcc); work =
work->next);
-
- /* return if not found */
- if (work->next != vcc)
- return;
-
- work->next = work->next->next;
- }
-
- if (vcc->reasBuffer) {
- dev_kfree_skb (vcc->reasBuffer);
- }
-
- dbg ("Allocated SARLib vcc 0x%p with vp %d vc %d", vcc, vcc->vp, vcc->vc);
-
- kfree (vcc);
-}
-
static void udsl_atm_dev_close (struct atm_dev *dev)
{
struct udsl_instance_data *instance = dev->dev_data;
@@ -1066,6 +922,7 @@
static int udsl_atm_open (struct atm_vcc *vcc, short vpi, int vci)
{
struct udsl_instance_data *instance = vcc->dev->dev_data;
+ struct atmsar_vcc_data *new;
dbg ("udsl_atm_open called");
@@ -1078,15 +935,28 @@
if (vcc->qos.aal != ATM_AAL5)
return -EINVAL;
+ if (!(new = kmalloc (sizeof (struct atmsar_vcc_data), GFP_KERNEL)))
+ return -ENOMEM;
+
MOD_INC_USE_COUNT;
- vcc->dev_data =
- atmsar_open (&(instance->atmsar_vcc_list), vcc, ATM_AAL5, vpi, vci, 0, 0,
- ATMSAR_USE_53BYTE_CELL | ATMSAR_SET_PTI);
- if (!vcc->dev_data) {
- MOD_DEC_USE_COUNT;
- return -ENOMEM; /* this is the only reason atmsar_open can fail... */
- }
+ memset (new, 0, sizeof (struct atmsar_vcc_data));
+ new->vcc = vcc;
+ new->vp = vpi;
+ new->vc = vci;
+
+ new->mtu = UDSL_MAX_AAL5_MRU;
+
+ new->atmHeader = ((unsigned long) vpi << ATM_HDR_VPI_SHIFT) |
+ ((unsigned long) vci << ATM_HDR_VCI_SHIFT);
+ new->reasBuffer = NULL;
+
+ new->next = instance->atmsar_vcc_list;
+ instance->atmsar_vcc_list = new;
+
+ dbg ("Allocated new SARLib vcc 0x%p with vp %d vc %d", new, vpi, vci);
+
+ vcc->dev_data = new;
vcc->vpi = vpi;
vcc->vci = vci;
@@ -1094,8 +964,6 @@
set_bit (ATM_VF_PARTIAL, &vcc->flags);
set_bit (ATM_VF_READY, &vcc->flags);
- ((struct atmsar_vcc_data *)vcc->dev_data)->mtu = UDSL_MAX_AAL5_MRU;
-
if (instance->firmware_loaded)
udsl_fire_receivers (instance);
@@ -1106,6 +974,7 @@
static void udsl_atm_close (struct atm_vcc *vcc)
{
struct udsl_instance_data *instance = vcc->dev->dev_data;
+ struct atmsar_vcc_data *work;
dbg ("udsl_atm_close called");
@@ -1118,7 +987,26 @@
/* cancel all sends on this vcc */
udsl_cancel_send (instance, vcc);
- atmsar_close (&(instance->atmsar_vcc_list), vcc->dev_data);
+ if (instance->atmsar_vcc_list == vcc->dev_data) {
+ instance->atmsar_vcc_list = instance->atmsar_vcc_list->next;
+ } else {
+ for (work = instance->atmsar_vcc_list; work && work->next &&
(work->next != vcc->dev_data); work = work->next);
+
+ /* return if not found */
+ if (work->next != vcc->dev_data)
+ BUG ();
+
+ work->next = work->next->next;
+ }
+
+ if (((struct atmsar_vcc_data *)vcc->dev_data)->reasBuffer) {
+ dev_kfree_skb (((struct atmsar_vcc_data *)vcc->dev_data)->reasBuffer);
+ }
+
+ dbg ("Deallocated SARLib vcc 0x%p with vp %d vc %d", vcc->dev_data,
vcc->dev_data->vp, vcc->dev_data->vc);
+
+ kfree (vcc->dev_data);
+
vcc->dev_data = NULL;
clear_bit (ATM_VF_PARTIAL, &vcc->flags);
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