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Message-Id: <1337142174-8304-4-git-send-email-kkeil@linux-pingi.de>
Date: Wed, 16 May 2012 06:22:49 +0200
From: Karsten Keil <kkeil@...ux-pingi.de>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Subject: [PATCH 3/8] mISDN: avmfritz use the bigger fifo of chip version 2
If we detect the latest hardware revision we should use the bigger fifo
to avoid TX underruns and have less interrupts.
TX underruns should be logged as warning.
Signed-off-by: Karsten Keil <kkeil@...ux-pingi.de>
---
drivers/isdn/hardware/mISDN/avmfritz.c | 62 +++++++++++++++++++------------
1 files changed, 38 insertions(+), 24 deletions(-)
diff --git a/drivers/isdn/hardware/mISDN/avmfritz.c b/drivers/isdn/hardware/mISDN/avmfritz.c
index 788b9a7..465cf5a 100644
--- a/drivers/isdn/hardware/mISDN/avmfritz.c
+++ b/drivers/isdn/hardware/mISDN/avmfritz.c
@@ -30,7 +30,7 @@
#include "ipac.h"
-#define AVMFRITZ_REV "2.1"
+#define AVMFRITZ_REV "2.2"
static int AVM_cnt;
static int debug;
@@ -69,6 +69,7 @@ enum {
#define HDLC_MODE_TRANS 0x02
#define HDLC_MODE_CCR_7 0x04
#define HDLC_MODE_CCR_16 0x08
+#define HDLC_FIFO_SIZE_128 0x20
#define HDLC_MODE_TESTLOOP 0x80
#define HDLC_INT_XPR 0x80
@@ -80,13 +81,16 @@ enum {
#define HDLC_STAT_RDO 0x10
#define HDLC_STAT_CRCVFRRAB 0x0E
#define HDLC_STAT_CRCVFR 0x06
-#define HDLC_STAT_RML_MASK 0x3f00
+#define HDLC_STAT_RML_MASK_V1 0x3f00
+#define HDLC_STAT_RML_MASK_V2 0x7f00
#define HDLC_CMD_XRS 0x80
#define HDLC_CMD_XME 0x01
#define HDLC_CMD_RRS 0x20
#define HDLC_CMD_XML_MASK 0x3f00
-#define HDLC_FIFO_SIZE 32
+
+#define HDLC_FIFO_SIZE_V1 32
+#define HDLC_FIFO_SIZE_V2 128
/* Fritz PCI v2.0 */
@@ -346,11 +350,14 @@ modehdlc(struct bchannel *bch, int protocol)
{
struct fritzcard *fc = bch->hw;
struct hdlc_hw *hdlc;
+ u8 mode;
hdlc = &fc->hdlc[(bch->nr - 1) & 1];
pr_debug("%s: hdlc %c protocol %x-->%x ch %d\n", fc->name,
'@' + bch->nr, bch->state, protocol, bch->nr);
hdlc->ctrl.ctrl = 0;
+ mode = (AVM_FRITZ_PCIV2 == fc->type) ? HDLC_FIFO_SIZE_128 : 0;
+
switch (protocol) {
case -1: /* used for init */
bch->state = -1;
@@ -358,7 +365,7 @@ modehdlc(struct bchannel *bch, int protocol)
if (bch->state == ISDN_P_NONE)
break;
hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
- hdlc->ctrl.sr.mode = HDLC_MODE_TRANS;
+ hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
write_ctrl(bch, 5);
bch->state = ISDN_P_NONE;
test_and_clear_bit(FLG_HDLC, &bch->Flags);
@@ -367,7 +374,7 @@ modehdlc(struct bchannel *bch, int protocol)
case ISDN_P_B_RAW:
bch->state = protocol;
hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
- hdlc->ctrl.sr.mode = HDLC_MODE_TRANS;
+ hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS;
write_ctrl(bch, 5);
hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
write_ctrl(bch, 1);
@@ -377,7 +384,7 @@ modehdlc(struct bchannel *bch, int protocol)
case ISDN_P_B_HDLC:
bch->state = protocol;
hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS;
- hdlc->ctrl.sr.mode = HDLC_MODE_ITF_FLG;
+ hdlc->ctrl.sr.mode = mode | HDLC_MODE_ITF_FLG;
write_ctrl(bch, 5);
hdlc->ctrl.sr.cmd = HDLC_CMD_XRS;
write_ctrl(bch, 1);
@@ -441,7 +448,7 @@ hdlc_fill_fifo(struct bchannel *bch)
{
struct fritzcard *fc = bch->hw;
struct hdlc_hw *hdlc;
- int count, cnt = 0;
+ int count, fs, cnt = 0;
u8 *p;
u32 *ptr, val, addr;
@@ -451,10 +458,12 @@ hdlc_fill_fifo(struct bchannel *bch)
count = bch->tx_skb->len - bch->tx_idx;
if (count <= 0)
return;
+ fs = (fc->type == AVM_FRITZ_PCIV2) ?
+ HDLC_FIFO_SIZE_V2 : HDLC_FIFO_SIZE_V1;
p = bch->tx_skb->data + bch->tx_idx;
hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XME;
- if (count > HDLC_FIFO_SIZE) {
- count = HDLC_FIFO_SIZE;
+ if (count > fs) {
+ count = fs;
} else {
if (test_bit(FLG_HDLC, &bch->Flags))
hdlc->ctrl.sr.cmd |= HDLC_CMD_XME;
@@ -463,7 +472,7 @@ hdlc_fill_fifo(struct bchannel *bch)
bch->tx_idx, bch->tx_skb->len);
ptr = (u32 *)p;
bch->tx_idx += count;
- hdlc->ctrl.sr.xml = ((count == HDLC_FIFO_SIZE) ? 0 : count);
+ hdlc->ctrl.sr.xml = ((count == fs) ? 0 : count);
if (AVM_FRITZ_PCIV2 == fc->type) {
__write_ctrl_pciv2(fc, hdlc, bch->nr);
addr = fc->addr + (bch->nr == 2 ?
@@ -502,13 +511,23 @@ static void
HDLC_irq(struct bchannel *bch, u32 stat)
{
struct fritzcard *fc = bch->hw;
- int len;
+ int len, fs;
+ u32 rmlMask;
struct hdlc_hw *hdlc;
hdlc = &fc->hdlc[(bch->nr - 1) & 1];
pr_debug("%s: ch%d stat %#x\n", fc->name, bch->nr, stat);
+ if (fc->type == AVM_FRITZ_PCIV2) {
+ rmlMask = HDLC_STAT_RML_MASK_V2;
+ fs = HDLC_FIFO_SIZE_V2;
+ } else {
+ rmlMask = HDLC_STAT_RML_MASK_V1;
+ fs = HDLC_FIFO_SIZE_V1;
+ }
if (stat & HDLC_INT_RPR) {
if (stat & HDLC_STAT_RDO) {
+ pr_warning("%s: ch%d stat %x RDO\n",
+ fc->name, bch->nr, stat);
hdlc->ctrl.sr.xml = 0;
hdlc->ctrl.sr.cmd |= HDLC_CMD_RRS;
write_ctrl(bch, 1);
@@ -517,21 +536,21 @@ HDLC_irq(struct bchannel *bch, u32 stat)
if (bch->rx_skb)
skb_trim(bch->rx_skb, 0);
} else {
- len = (stat & HDLC_STAT_RML_MASK) >> 8;
+ len = (stat & rmlMask) >> 8;
if (!len)
- len = 32;
+ len = fs;
hdlc_empty_fifo(bch, len);
if (!bch->rx_skb)
goto handle_tx;
- if ((stat & HDLC_STAT_RME) || test_bit(FLG_TRANSPARENT,
- &bch->Flags)) {
+ if (test_bit(FLG_TRANSPARENT, &bch->Flags) ||
+ (stat & HDLC_STAT_RME)) {
if (((stat & HDLC_STAT_CRCVFRRAB) ==
HDLC_STAT_CRCVFR) ||
test_bit(FLG_TRANSPARENT, &bch->Flags)) {
recv_Bchannel(bch, 0);
} else {
- pr_debug("%s: got invalid frame\n",
- fc->name);
+ pr_warning("%s: got invalid frame\n",
+ fc->name);
skb_trim(bch->rx_skb, 0);
}
}
@@ -543,13 +562,8 @@ handle_tx:
* restart transmitting the whole frame on HDLC
* in transparent mode we send the next data
*/
- if (bch->tx_skb)
- pr_debug("%s: ch%d XDU len(%d) idx(%d) Flags(%lx)\n",
- fc->name, bch->nr, bch->tx_skb->len,
- bch->tx_idx, bch->Flags);
- else
- pr_debug("%s: ch%d XDU no tx_skb Flags(%lx)\n",
- fc->name, bch->nr, bch->Flags);
+ pr_warning("%s: ch%d stat %x XDU %s\n", fc->name, bch->nr,
+ stat, bch->tx_skb ? "tx_skb" : "no tx_skb");
if (bch->tx_skb && bch->tx_skb->len) {
if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
bch->tx_idx = 0;
--
1.7.3.4
--
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