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android_kernel_xiaomi_sm8350/drivers/usb/net/catc.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
/*
* Copyright (c) 2001 Vojtech Pavlik
*
* CATC EL1210A NetMate USB Ethernet driver
*
* Sponsored by SuSE
*
* Based on the work of
* Donald Becker
*
* Old chipset support added by Simon Evans <spse@secret.org.uk> 2002
* - adds support for Belkin F5U011
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Should you need to contact me, the author, you can do so either by
* e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/ethtool.h>
#include <linux/crc32.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#undef DEBUG
#include <linux/usb.h>
/*
* Version information.
*/
#define DRIVER_VERSION "v2.8"
#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@suse.cz>"
#define DRIVER_DESC "CATC EL1210A NetMate USB Ethernet driver"
#define SHORT_DRIVER_DESC "EL1210A NetMate USB Ethernet"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
static const char driver_name[] = "catc";
/*
* Some defines.
*/
#define STATS_UPDATE (HZ) /* Time between stats updates */
#define TX_TIMEOUT (5*HZ) /* Max time the queue can be stopped */
#define PKT_SZ 1536 /* Max Ethernet packet size */
#define RX_MAX_BURST 15 /* Max packets per rx buffer (> 0, < 16) */
#define TX_MAX_BURST 15 /* Max full sized packets per tx buffer (> 0) */
#define CTRL_QUEUE 16 /* Max control requests in flight (power of two) */
#define RX_PKT_SZ 1600 /* Max size of receive packet for F5U011 */
/*
* Control requests.
*/
enum control_requests {
ReadMem = 0xf1,
GetMac = 0xf2,
Reset = 0xf4,
SetMac = 0xf5,
SetRxMode = 0xf5, /* F5U011 only */
WriteROM = 0xf8,
SetReg = 0xfa,
GetReg = 0xfb,
WriteMem = 0xfc,
ReadROM = 0xfd,
};
/*
* Registers.
*/
enum register_offsets {
TxBufCount = 0x20,
RxBufCount = 0x21,
OpModes = 0x22,
TxQed = 0x23,
RxQed = 0x24,
MaxBurst = 0x25,
RxUnit = 0x60,
EthStatus = 0x61,
StationAddr0 = 0x67,
EthStats = 0x69,
LEDCtrl = 0x81,
};
enum eth_stats {
TxSingleColl = 0x00,
TxMultiColl = 0x02,
TxExcessColl = 0x04,
RxFramErr = 0x06,
};
enum op_mode_bits {
Op3MemWaits = 0x03,
OpLenInclude = 0x08,
OpRxMerge = 0x10,
OpTxMerge = 0x20,
OpWin95bugfix = 0x40,
OpLoopback = 0x80,
};
enum rx_filter_bits {
RxEnable = 0x01,
RxPolarity = 0x02,
RxForceOK = 0x04,
RxMultiCast = 0x08,
RxPromisc = 0x10,
AltRxPromisc = 0x20, /* F5U011 uses different bit */
};
enum led_values {
LEDFast = 0x01,
LEDSlow = 0x02,
LEDFlash = 0x03,
LEDPulse = 0x04,
LEDLink = 0x08,
};
enum link_status {
LinkNoChange = 0,
LinkGood = 1,
LinkBad = 2
};
/*
* The catc struct.
*/
#define CTRL_RUNNING 0
#define RX_RUNNING 1
#define TX_RUNNING 2
struct catc {
struct net_device *netdev;
struct usb_device *usbdev;
struct net_device_stats stats;
unsigned long flags;
unsigned int tx_ptr, tx_idx;
unsigned int ctrl_head, ctrl_tail;
spinlock_t tx_lock, ctrl_lock;
u8 tx_buf[2][TX_MAX_BURST * (PKT_SZ + 2)];
u8 rx_buf[RX_MAX_BURST * (PKT_SZ + 2)];
u8 irq_buf[2];
u8 ctrl_buf[64];
struct usb_ctrlrequest ctrl_dr;
struct timer_list timer;
u8 stats_buf[8];
u16 stats_vals[4];
unsigned long last_stats;
u8 multicast[64];
struct ctrl_queue {
u8 dir;
u8 request;
u16 value;
u16 index;
void *buf;
int len;
void (*callback)(struct catc *catc, struct ctrl_queue *q);
} ctrl_queue[CTRL_QUEUE];
struct urb *tx_urb, *rx_urb, *irq_urb, *ctrl_urb;
u8 is_f5u011; /* Set if device is an F5U011 */
u8 rxmode[2]; /* Used for F5U011 */
atomic_t recq_sz; /* Used for F5U011 - counter of waiting rx packets */
};
/*
* Useful macros.
*/
#define catc_get_mac(catc, mac) catc_ctrl_msg(catc, USB_DIR_IN, GetMac, 0, 0, mac, 6)
#define catc_reset(catc) catc_ctrl_msg(catc, USB_DIR_OUT, Reset, 0, 0, NULL, 0)
#define catc_set_reg(catc, reg, val) catc_ctrl_msg(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0)
#define catc_get_reg(catc, reg, buf) catc_ctrl_msg(catc, USB_DIR_IN, GetReg, 0, reg, buf, 1)
#define catc_write_mem(catc, addr, buf, size) catc_ctrl_msg(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size)
#define catc_read_mem(catc, addr, buf, size) catc_ctrl_msg(catc, USB_DIR_IN, ReadMem, 0, addr, buf, size)
#define f5u011_rxmode(catc, rxmode) catc_ctrl_msg(catc, USB_DIR_OUT, SetRxMode, 0, 1, rxmode, 2)
#define f5u011_rxmode_async(catc, rxmode) catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 1, &rxmode, 2, NULL)
#define f5u011_mchash_async(catc, hash) catc_ctrl_async(catc, USB_DIR_OUT, SetRxMode, 0, 2, &hash, 8, NULL)
#define catc_set_reg_async(catc, reg, val) catc_ctrl_async(catc, USB_DIR_OUT, SetReg, val, reg, NULL, 0, NULL)
#define catc_get_reg_async(catc, reg, cb) catc_ctrl_async(catc, USB_DIR_IN, GetReg, 0, reg, NULL, 1, cb)
#define catc_write_mem_async(catc, addr, buf, size) catc_ctrl_async(catc, USB_DIR_OUT, WriteMem, 0, addr, buf, size, NULL)
/*
* Receive routines.
*/
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 09:55:46 -04:00
static void catc_rx_done(struct urb *urb)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
{
struct catc *catc = urb->context;
u8 *pkt_start = urb->transfer_buffer;
struct sk_buff *skb;
int pkt_len, pkt_offset = 0;
if (!catc->is_f5u011) {
clear_bit(RX_RUNNING, &catc->flags);
pkt_offset = 2;
}
if (urb->status) {
dbg("rx_done, status %d, length %d", urb->status, urb->actual_length);
return;
}
do {
if(!catc->is_f5u011) {
pkt_len = le16_to_cpup((__le16*)pkt_start);
if (pkt_len > urb->actual_length) {
catc->stats.rx_length_errors++;
catc->stats.rx_errors++;
break;
}
} else {
pkt_len = urb->actual_length;
}
if (!(skb = dev_alloc_skb(pkt_len)))
return;
skb->dev = catc->netdev;
eth_copy_and_sum(skb, pkt_start + pkt_offset, pkt_len, 0);
skb_put(skb, pkt_len);
skb->protocol = eth_type_trans(skb, catc->netdev);
netif_rx(skb);
catc->stats.rx_packets++;
catc->stats.rx_bytes += pkt_len;
/* F5U011 only does one packet per RX */
if (catc->is_f5u011)
break;
pkt_start += (((pkt_len + 1) >> 6) + 1) << 6;
} while (pkt_start - (u8 *) urb->transfer_buffer < urb->actual_length);
catc->netdev->last_rx = jiffies;
if (catc->is_f5u011) {
if (atomic_read(&catc->recq_sz)) {
int status;
atomic_dec(&catc->recq_sz);
dbg("getting extra packet");
urb->dev = catc->usbdev;
if ((status = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
dbg("submit(rx_urb) status %d", status);
}
} else {
clear_bit(RX_RUNNING, &catc->flags);
}
}
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 09:55:46 -04:00
static void catc_irq_done(struct urb *urb)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
{
struct catc *catc = urb->context;
u8 *data = urb->transfer_buffer;
int status;
unsigned int hasdata = 0, linksts = LinkNoChange;
if (!catc->is_f5u011) {
hasdata = data[1] & 0x80;
if (data[1] & 0x40)
linksts = LinkGood;
else if (data[1] & 0x20)
linksts = LinkBad;
} else {
hasdata = (unsigned int)(be16_to_cpup((__be16*)data) & 0x0fff);
if (data[0] == 0x90)
linksts = LinkGood;
else if (data[0] == 0xA0)
linksts = LinkBad;
}
switch (urb->status) {
case 0: /* success */
break;
case -ECONNRESET: /* unlink */
case -ENOENT:
case -ESHUTDOWN:
return;
/* -EPIPE: should clear the halt */
default: /* error */
dbg("irq_done, status %d, data %02x %02x.", urb->status, data[0], data[1]);
goto resubmit;
}
if (linksts == LinkGood) {
netif_carrier_on(catc->netdev);
dbg("link ok");
}
if (linksts == LinkBad) {
netif_carrier_off(catc->netdev);
dbg("link bad");
}
if (hasdata) {
if (test_and_set_bit(RX_RUNNING, &catc->flags)) {
if (catc->is_f5u011)
atomic_inc(&catc->recq_sz);
} else {
catc->rx_urb->dev = catc->usbdev;
if ((status = usb_submit_urb(catc->rx_urb, GFP_ATOMIC)) < 0) {
err("submit(rx_urb) status %d", status);
}
}
}
resubmit:
[PATCH] slab: remove SLAB_ATOMIC SLAB_ATOMIC is an alias of GFP_ATOMIC Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-06 23:33:16 -05:00
status = usb_submit_urb (urb, GFP_ATOMIC);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
if (status)
err ("can't resubmit intr, %s-%s, status %d",
catc->usbdev->bus->bus_name,
catc->usbdev->devpath, status);
}
/*
* Transmit routines.
*/
static void catc_tx_run(struct catc *catc)
{
int status;
if (catc->is_f5u011)
catc->tx_ptr = (catc->tx_ptr + 63) & ~63;
catc->tx_urb->transfer_buffer_length = catc->tx_ptr;
catc->tx_urb->transfer_buffer = catc->tx_buf[catc->tx_idx];
catc->tx_urb->dev = catc->usbdev;
if ((status = usb_submit_urb(catc->tx_urb, GFP_ATOMIC)) < 0)
err("submit(tx_urb), status %d", status);
catc->tx_idx = !catc->tx_idx;
catc->tx_ptr = 0;
catc->netdev->trans_start = jiffies;
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 09:55:46 -04:00
static void catc_tx_done(struct urb *urb)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
{
struct catc *catc = urb->context;
unsigned long flags;
if (urb->status == -ECONNRESET) {
dbg("Tx Reset.");
urb->status = 0;
catc->netdev->trans_start = jiffies;
catc->stats.tx_errors++;
clear_bit(TX_RUNNING, &catc->flags);
netif_wake_queue(catc->netdev);
return;
}
if (urb->status) {
dbg("tx_done, status %d, length %d", urb->status, urb->actual_length);
return;
}
spin_lock_irqsave(&catc->tx_lock, flags);
if (catc->tx_ptr)
catc_tx_run(catc);
else
clear_bit(TX_RUNNING, &catc->flags);
netif_wake_queue(catc->netdev);
spin_unlock_irqrestore(&catc->tx_lock, flags);
}
static int catc_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
unsigned long flags;
char *tx_buf;
spin_lock_irqsave(&catc->tx_lock, flags);
catc->tx_ptr = (((catc->tx_ptr - 1) >> 6) + 1) << 6;
tx_buf = catc->tx_buf[catc->tx_idx] + catc->tx_ptr;
*((u16*)tx_buf) = (catc->is_f5u011) ? cpu_to_be16((u16)skb->len) : cpu_to_le16((u16)skb->len);
memcpy(tx_buf + 2, skb->data, skb->len);
catc->tx_ptr += skb->len + 2;
if (!test_and_set_bit(TX_RUNNING, &catc->flags))
catc_tx_run(catc);
if ((catc->is_f5u011 && catc->tx_ptr)
|| (catc->tx_ptr >= ((TX_MAX_BURST - 1) * (PKT_SZ + 2))))
netif_stop_queue(netdev);
spin_unlock_irqrestore(&catc->tx_lock, flags);
catc->stats.tx_bytes += skb->len;
catc->stats.tx_packets++;
dev_kfree_skb(skb);
return 0;
}
static void catc_tx_timeout(struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
warn("Transmit timed out.");
usb_unlink_urb(catc->tx_urb);
}
/*
* Control messages.
*/
static int catc_ctrl_msg(struct catc *catc, u8 dir, u8 request, u16 value, u16 index, void *buf, int len)
{
int retval = usb_control_msg(catc->usbdev,
dir ? usb_rcvctrlpipe(catc->usbdev, 0) : usb_sndctrlpipe(catc->usbdev, 0),
request, 0x40 | dir, value, index, buf, len, 1000);
return retval < 0 ? retval : 0;
}
static void catc_ctrl_run(struct catc *catc)
{
struct ctrl_queue *q = catc->ctrl_queue + catc->ctrl_tail;
struct usb_device *usbdev = catc->usbdev;
struct urb *urb = catc->ctrl_urb;
struct usb_ctrlrequest *dr = &catc->ctrl_dr;
int status;
dr->bRequest = q->request;
dr->bRequestType = 0x40 | q->dir;
dr->wValue = cpu_to_le16(q->value);
dr->wIndex = cpu_to_le16(q->index);
dr->wLength = cpu_to_le16(q->len);
urb->pipe = q->dir ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0);
urb->transfer_buffer_length = q->len;
urb->transfer_buffer = catc->ctrl_buf;
urb->setup_packet = (void *) dr;
urb->dev = usbdev;
if (!q->dir && q->buf && q->len)
memcpy(catc->ctrl_buf, q->buf, q->len);
if ((status = usb_submit_urb(catc->ctrl_urb, GFP_KERNEL)))
err("submit(ctrl_urb) status %d", status);
}
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 09:55:46 -04:00
static void catc_ctrl_done(struct urb *urb)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
{
struct catc *catc = urb->context;
struct ctrl_queue *q;
unsigned long flags;
if (urb->status)
dbg("ctrl_done, status %d, len %d.", urb->status, urb->actual_length);
spin_lock_irqsave(&catc->ctrl_lock, flags);
q = catc->ctrl_queue + catc->ctrl_tail;
if (q->dir) {
if (q->buf && q->len)
memcpy(q->buf, catc->ctrl_buf, q->len);
else
q->buf = catc->ctrl_buf;
}
if (q->callback)
q->callback(catc, q);
catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
if (catc->ctrl_head != catc->ctrl_tail)
catc_ctrl_run(catc);
else
clear_bit(CTRL_RUNNING, &catc->flags);
spin_unlock_irqrestore(&catc->ctrl_lock, flags);
}
static int catc_ctrl_async(struct catc *catc, u8 dir, u8 request, u16 value,
u16 index, void *buf, int len, void (*callback)(struct catc *catc, struct ctrl_queue *q))
{
struct ctrl_queue *q;
int retval = 0;
unsigned long flags;
spin_lock_irqsave(&catc->ctrl_lock, flags);
q = catc->ctrl_queue + catc->ctrl_head;
q->dir = dir;
q->request = request;
q->value = value;
q->index = index;
q->buf = buf;
q->len = len;
q->callback = callback;
catc->ctrl_head = (catc->ctrl_head + 1) & (CTRL_QUEUE - 1);
if (catc->ctrl_head == catc->ctrl_tail) {
err("ctrl queue full");
catc->ctrl_tail = (catc->ctrl_tail + 1) & (CTRL_QUEUE - 1);
retval = -1;
}
if (!test_and_set_bit(CTRL_RUNNING, &catc->flags))
catc_ctrl_run(catc);
spin_unlock_irqrestore(&catc->ctrl_lock, flags);
return retval;
}
/*
* Statistics.
*/
static void catc_stats_done(struct catc *catc, struct ctrl_queue *q)
{
int index = q->index - EthStats;
u16 data, last;
catc->stats_buf[index] = *((char *)q->buf);
if (index & 1)
return;
data = ((u16)catc->stats_buf[index] << 8) | catc->stats_buf[index + 1];
last = catc->stats_vals[index >> 1];
switch (index) {
case TxSingleColl:
case TxMultiColl:
catc->stats.collisions += data - last;
break;
case TxExcessColl:
catc->stats.tx_aborted_errors += data - last;
catc->stats.tx_errors += data - last;
break;
case RxFramErr:
catc->stats.rx_frame_errors += data - last;
catc->stats.rx_errors += data - last;
break;
}
catc->stats_vals[index >> 1] = data;
}
static void catc_stats_timer(unsigned long data)
{
struct catc *catc = (void *) data;
int i;
for (i = 0; i < 8; i++)
catc_get_reg_async(catc, EthStats + 7 - i, catc_stats_done);
mod_timer(&catc->timer, jiffies + STATS_UPDATE);
}
static struct net_device_stats *catc_get_stats(struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
return &catc->stats;
}
/*
* Receive modes. Broadcast, Multicast, Promisc.
*/
static void catc_multicast(unsigned char *addr, u8 *multicast)
{
u32 crc;
crc = ether_crc_le(6, addr);
multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
}
static void catc_set_multicast_list(struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
struct dev_mc_list *mc;
u8 broadcast[6];
u8 rx = RxEnable | RxPolarity | RxMultiCast;
int i;
memset(broadcast, 0xff, 6);
memset(catc->multicast, 0, 64);
catc_multicast(broadcast, catc->multicast);
catc_multicast(netdev->dev_addr, catc->multicast);
if (netdev->flags & IFF_PROMISC) {
memset(catc->multicast, 0xff, 64);
rx |= (!catc->is_f5u011) ? RxPromisc : AltRxPromisc;
}
if (netdev->flags & IFF_ALLMULTI) {
memset(catc->multicast, 0xff, 64);
} else {
for (i = 0, mc = netdev->mc_list; mc && i < netdev->mc_count; i++, mc = mc->next) {
u32 crc = ether_crc_le(6, mc->dmi_addr);
if (!catc->is_f5u011) {
catc->multicast[(crc >> 3) & 0x3f] |= 1 << (crc & 7);
} else {
catc->multicast[7-(crc >> 29)] |= 1 << ((crc >> 26) & 7);
}
}
}
if (!catc->is_f5u011) {
catc_set_reg_async(catc, RxUnit, rx);
catc_write_mem_async(catc, 0xfa80, catc->multicast, 64);
} else {
f5u011_mchash_async(catc, catc->multicast);
if (catc->rxmode[0] != rx) {
catc->rxmode[0] = rx;
dbg("Setting RX mode to %2.2X %2.2X", catc->rxmode[0], catc->rxmode[1]);
f5u011_rxmode_async(catc, catc->rxmode);
}
}
}
static void catc_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
struct catc *catc = netdev_priv(dev);
strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
usb_make_path (catc->usbdev, info->bus_info, sizeof info->bus_info);
}
static int catc_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct catc *catc = netdev_priv(dev);
if (!catc->is_f5u011)
return -EOPNOTSUPP;
cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_TP;
cmd->advertising = ADVERTISED_10baseT_Half | ADVERTISED_TP;
cmd->speed = SPEED_10;
cmd->duplex = DUPLEX_HALF;
cmd->port = PORT_TP;
cmd->phy_address = 0;
cmd->transceiver = XCVR_INTERNAL;
cmd->autoneg = AUTONEG_DISABLE;
cmd->maxtxpkt = 1;
cmd->maxrxpkt = 1;
return 0;
}
static struct ethtool_ops ops = {
.get_drvinfo = catc_get_drvinfo,
.get_settings = catc_get_settings,
.get_link = ethtool_op_get_link
};
/*
* Open, close.
*/
static int catc_open(struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
int status;
catc->irq_urb->dev = catc->usbdev;
if ((status = usb_submit_urb(catc->irq_urb, GFP_KERNEL)) < 0) {
err("submit(irq_urb) status %d", status);
return -1;
}
netif_start_queue(netdev);
if (!catc->is_f5u011)
mod_timer(&catc->timer, jiffies + STATS_UPDATE);
return 0;
}
static int catc_stop(struct net_device *netdev)
{
struct catc *catc = netdev_priv(netdev);
netif_stop_queue(netdev);
if (!catc->is_f5u011)
del_timer_sync(&catc->timer);
usb_kill_urb(catc->rx_urb);
usb_kill_urb(catc->tx_urb);
usb_kill_urb(catc->irq_urb);
usb_kill_urb(catc->ctrl_urb);
return 0;
}
/*
* USB probe, disconnect.
*/
static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *usbdev = interface_to_usbdev(intf);
struct net_device *netdev;
struct catc *catc;
u8 broadcast[6];
int i, pktsz;
if (usb_set_interface(usbdev,
intf->altsetting->desc.bInterfaceNumber, 1)) {
err("Can't set altsetting 1.");
return -EIO;
}
netdev = alloc_etherdev(sizeof(struct catc));
if (!netdev)
return -ENOMEM;
catc = netdev_priv(netdev);
netdev->open = catc_open;
netdev->hard_start_xmit = catc_hard_start_xmit;
netdev->stop = catc_stop;
netdev->get_stats = catc_get_stats;
netdev->tx_timeout = catc_tx_timeout;
netdev->watchdog_timeo = TX_TIMEOUT;
netdev->set_multicast_list = catc_set_multicast_list;
SET_ETHTOOL_OPS(netdev, &ops);
catc->usbdev = usbdev;
catc->netdev = netdev;
spin_lock_init(&catc->tx_lock);
spin_lock_init(&catc->ctrl_lock);
init_timer(&catc->timer);
catc->timer.data = (long) catc;
catc->timer.function = catc_stats_timer;
catc->ctrl_urb = usb_alloc_urb(0, GFP_KERNEL);
catc->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
catc->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
catc->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
if ((!catc->ctrl_urb) || (!catc->tx_urb) ||
(!catc->rx_urb) || (!catc->irq_urb)) {
err("No free urbs available.");
usb: catc free urb cleanup - usb_free_urb() cleanup Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-11-08 09:36:22 -05:00
usb_free_urb(catc->ctrl_urb);
usb_free_urb(catc->tx_urb);
usb_free_urb(catc->rx_urb);
usb_free_urb(catc->irq_urb);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 18:20:36 -04:00
free_netdev(netdev);
return -ENOMEM;
}
/* The F5U011 has the same vendor/product as the netmate but a device version of 0x130 */
if (le16_to_cpu(usbdev->descriptor.idVendor) == 0x0423 &&
le16_to_cpu(usbdev->descriptor.idProduct) == 0xa &&
le16_to_cpu(catc->usbdev->descriptor.bcdDevice) == 0x0130) {
dbg("Testing for f5u011");
catc->is_f5u011 = 1;
atomic_set(&catc->recq_sz, 0);
pktsz = RX_PKT_SZ;
} else {
pktsz = RX_MAX_BURST * (PKT_SZ + 2);
}
usb_fill_control_urb(catc->ctrl_urb, usbdev, usb_sndctrlpipe(usbdev, 0),
NULL, NULL, 0, catc_ctrl_done, catc);
usb_fill_bulk_urb(catc->tx_urb, usbdev, usb_sndbulkpipe(usbdev, 1),
NULL, 0, catc_tx_done, catc);
usb_fill_bulk_urb(catc->rx_urb, usbdev, usb_rcvbulkpipe(usbdev, 1),
catc->rx_buf, pktsz, catc_rx_done, catc);
usb_fill_int_urb(catc->irq_urb, usbdev, usb_rcvintpipe(usbdev, 2),
catc->irq_buf, 2, catc_irq_done, catc, 1);
if (!catc->is_f5u011) {
dbg("Checking memory size\n");
i = 0x12345678;
catc_write_mem(catc, 0x7a80, &i, 4);
i = 0x87654321;
catc_write_mem(catc, 0xfa80, &i, 4);
catc_read_mem(catc, 0x7a80, &i, 4);
switch (i) {
case 0x12345678:
catc_set_reg(catc, TxBufCount, 8);
catc_set_reg(catc, RxBufCount, 32);
dbg("64k Memory\n");
break;
default:
warn("Couldn't detect memory size, assuming 32k");
case 0x87654321:
catc_set_reg(catc, TxBufCount, 4);
catc_set_reg(catc, RxBufCount, 16);
dbg("32k Memory\n");
break;
}
dbg("Getting MAC from SEEROM.");
catc_get_mac(catc, netdev->dev_addr);
dbg("Setting MAC into registers.");
for (i = 0; i < 6; i++)
catc_set_reg(catc, StationAddr0 - i, netdev->dev_addr[i]);
dbg("Filling the multicast list.");
memset(broadcast, 0xff, 6);
catc_multicast(broadcast, catc->multicast);
catc_multicast(netdev->dev_addr, catc->multicast);
catc_write_mem(catc, 0xfa80, catc->multicast, 64);
dbg("Clearing error counters.");
for (i = 0; i < 8; i++)
catc_set_reg(catc, EthStats + i, 0);
catc->last_stats = jiffies;
dbg("Enabling.");
catc_set_reg(catc, MaxBurst, RX_MAX_BURST);
catc_set_reg(catc, OpModes, OpTxMerge | OpRxMerge | OpLenInclude | Op3MemWaits);
catc_set_reg(catc, LEDCtrl, LEDLink);
catc_set_reg(catc, RxUnit, RxEnable | RxPolarity | RxMultiCast);
} else {
dbg("Performing reset\n");
catc_reset(catc);
catc_get_mac(catc, netdev->dev_addr);
dbg("Setting RX Mode");
catc->rxmode[0] = RxEnable | RxPolarity | RxMultiCast;
catc->rxmode[1] = 0;
f5u011_rxmode(catc, catc->rxmode);
}
dbg("Init done.");
printk(KERN_INFO "%s: %s USB Ethernet at usb-%s-%s, ",
netdev->name, (catc->is_f5u011) ? "Belkin F5U011" : "CATC EL1210A NetMate",
usbdev->bus->bus_name, usbdev->devpath);
for (i = 0; i < 5; i++) printk("%2.2x:", netdev->dev_addr[i]);
printk("%2.2x.\n", netdev->dev_addr[i]);
usb_set_intfdata(intf, catc);
SET_NETDEV_DEV(netdev, &intf->dev);
if (register_netdev(netdev) != 0) {
usb_set_intfdata(intf, NULL);
usb_free_urb(catc->ctrl_urb);
usb_free_urb(catc->tx_urb);
usb_free_urb(catc->rx_urb);
usb_free_urb(catc->irq_urb);
free_netdev(netdev);
return -EIO;
}
return 0;
}
static void catc_disconnect(struct usb_interface *intf)
{
struct catc *catc = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (catc) {
unregister_netdev(catc->netdev);
usb_free_urb(catc->ctrl_urb);
usb_free_urb(catc->tx_urb);
usb_free_urb(catc->rx_urb);
usb_free_urb(catc->irq_urb);
free_netdev(catc->netdev);
}
}
/*
* Module functions and tables.
*/
static struct usb_device_id catc_id_table [] = {
{ USB_DEVICE(0x0423, 0xa) }, /* CATC Netmate, Belkin F5U011 */
{ USB_DEVICE(0x0423, 0xc) }, /* CATC Netmate II, Belkin F5U111 */
{ USB_DEVICE(0x08d1, 0x1) }, /* smartBridges smartNIC */
{ }
};
MODULE_DEVICE_TABLE(usb, catc_id_table);
static struct usb_driver catc_driver = {
.name = driver_name,
.probe = catc_probe,
.disconnect = catc_disconnect,
.id_table = catc_id_table,
};
static int __init catc_init(void)
{
int result = usb_register(&catc_driver);
if (result == 0)
info(DRIVER_VERSION " " DRIVER_DESC);
return result;
}
static void __exit catc_exit(void)
{
usb_deregister(&catc_driver);
}
module_init(catc_init);
module_exit(catc_exit);
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