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Date: Sat, 1 Aug 2020 22:54:01 +0200
From: Armin Wolf <W_Armin@....de>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org
Subject: [PATCH 2/2 v2 net-next] lib8390: Fix coding-style issues and remove
verion printing
Fix various checkpatch warnings.
Remove version printing so modules including lib8390 do not
have to provide a global version string for successful
compilation.
Replace pr_cont() with SMP-safe construct.
Signed-off-by: Armin Wolf <W_Armin@....de>
---
drivers/net/ethernet/8390/lib8390.c | 606 ++++++++++++++--------------
1 file changed, 301 insertions(+), 305 deletions(-)
diff --git a/drivers/net/ethernet/8390/lib8390.c b/drivers/net/ethernet/8390/lib8390.c
index babc92e2692e..e13693b20660 100644
--- a/drivers/net/ethernet/8390/lib8390.c
+++ b/drivers/net/ethernet/8390/lib8390.c
@@ -1,54 +1,51 @@
-/* 8390.c: A general NS8390 ethernet driver core for linux. */
-/*
- Written 1992-94 by Donald Becker.
-
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency.
-
- This software may be used and distributed according to the terms
- of the GNU General Public License, incorporated herein by reference.
-
- The author may be reached as becker@...ld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
-
-
- This is the chip-specific code for many 8390-based ethernet adaptors.
- This is not a complete driver, it must be combined with board-specific
- code such as ne.c, wd.c, 3c503.c, etc.
-
- Seeing how at least eight drivers use this code, (not counting the
- PCMCIA ones either) it is easy to break some card by what seems like
- a simple innocent change. Please contact me or Donald if you think
- you have found something that needs changing. -- PG
-
-
- Changelog:
-
- Paul Gortmaker : remove set_bit lock, other cleanups.
- Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
- ei_block_input() for eth_io_copy_and_sum().
- Paul Gortmaker : exchange static int ei_pingpong for a #define,
- also add better Tx error handling.
- Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
- Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
- Paul Gortmaker : tweak ANK's above multicast changes a bit.
- Paul Gortmaker : update packet statistics for v2.1.x
- Alan Cox : support arbitrary stupid port mappings on the
- 68K Macintosh. Support >16bit I/O spaces
- Paul Gortmaker : add kmod support for auto-loading of the 8390
- module by all drivers that require it.
- Alan Cox : Spinlocking work, added 'BUG_83C690'
- Paul Gortmaker : Separate out Tx timeout code from Tx path.
- Paul Gortmaker : Remove old unused single Tx buffer code.
- Hayato Fujiwara : Add m32r support.
- Paul Gortmaker : use skb_padto() instead of stack scratch area
-
- Sources:
- The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
-
- */
+/* lib8390.c: A general NS8390 ethernet driver core for linux. */
+/* Written 1992-94 by Donald Becker.
+ *
+ * Copyright 1993 United States Government as represented by the
+ * Director, National Security Agency.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * The author may be reached as becker@...ld.com, or C/O
+ * Scyld Computing Corporation
+ * 410 Severn Ave., Suite 210
+ * Annapolis MD 21403
+ *
+ * This is the chip-specific code for many 8390-based ethernet adaptors.
+ * This is not a complete driver, it must be combined with board-specific
+ * code such as ne.c, wd.c, 3c503.c, etc.
+ *
+ * Seeing how at least eight drivers use this code, (not counting the
+ * PCMCIA ones either) it is easy to break some card by what seems like
+ * a simple innocent change. Please contact me or Donald if you think
+ * you have found something that needs changing. -- PG
+ */
+
+/* Changelog:
+ *
+ * Paul Gortmaker : remove set_bit lock, other cleanups.
+ * Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
+ * ei_block_input() for eth_io_copy_and_sum().
+ * Paul Gortmaker : exchange static int ei_pingpong for a #define,
+ * also add better Tx error handling.
+ * Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
+ * Alexey Kuznetsov : use the 8390's six bit hash multicast filter.
+ * Paul Gortmaker : tweak ANK's above multicast changes a bit.
+ * Paul Gortmaker : update packet statistics for v2.1.x
+ * Alan Cox : support arbitrary stupid port mappings on the
+ * 68K Macintosh. Support >16bit I/O spaces
+ * Paul Gortmaker : add kmod support for auto-loading of the 8390
+ * module by all drivers that require it.
+ * Alan Cox : Spinlocking work, added 'BUG_83C690'
+ * Paul Gortmaker : Separate out Tx timeout code from Tx path.
+ * Paul Gortmaker : Remove old unused single Tx buffer code.
+ * Hayato Fujiwara : Add m32r support.
+ * Paul Gortmaker : use skb_padto() instead of stack scratch area
+ *
+ * Sources:
+ * The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
+ */
#include <linux/module.h>
#include <linux/kernel.h>
@@ -77,23 +74,25 @@
#define BUG_83C690
/* These are the operational function interfaces to board-specific
- routines.
- void reset_8390(struct net_device *dev)
- Resets the board associated with DEV, including a hardware reset of
- the 8390. This is only called when there is a transmit timeout, and
- it is always followed by 8390_init().
- void block_output(struct net_device *dev, int count, const unsigned char *buf,
- int start_page)
- Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
- "page" value uses the 8390's 256-byte pages.
- void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr, int ring_page)
- Read the 4 byte, page aligned 8390 header. *If* there is a
- subsequent read, it will be of the rest of the packet.
- void block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
- Read COUNT bytes from the packet buffer into the skb data area. Start
- reading from RING_OFFSET, the address as the 8390 sees it. This will always
- follow the read of the 8390 header.
-*/
+ * routines.
+ * void reset_8390(struct net_device *dev)
+ * Resets the board associated with DEV, including a hardware reset
+ * of the 8390. This is only called when there is a transmit
+ * timeout, and it is always followed by 8390_init().
+ * void block_output(struct net_device *dev, int count,
+ * const unsigned char *buf, int start_page)
+ * Write the COUNT bytes of BUF to the packet buffer at START_PAGE.
+ * The "page" value uses the 8390's 256-byte pages.
+ * void get_8390_hdr(struct net_device *dev, struct e8390_hdr *hdr,
+ * int ring_page)
+ * Read the 4 byte, page aligned 8390 header. *If* there is a
+ * subsequent read, it will be of the rest of the packet.
+ * void block_input(struct net_device *dev, int count,
+ * struct sk_buff *skb, int ring_offset)
+ * Read COUNT bytes from the packet buffer into the skb data area.
+ * Start reading from RING_OFFSET, the address as the 8390 sees it.
+ * This will always follow the read of the 8390 header.
+ */
#define ei_reset_8390 (ei_local->reset_8390)
#define ei_block_output (ei_local->block_output)
#define ei_block_input (ei_local->block_input)
@@ -106,90 +105,86 @@ static void ei_receive(struct net_device *dev);
static void ei_rx_overrun(struct net_device *dev);
/* Routines generic to NS8390-based boards. */
-static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
- int start_page);
+static void NS8390_trigger_send(struct net_device *dev,
+ unsigned int length, int start_page);
static void do_set_multicast_list(struct net_device *dev);
static void __NS8390_init(struct net_device *dev, int startp);
-static unsigned version_printed;
static u32 msg_enable;
+
module_param(msg_enable, uint, 0444);
MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
-/*
- * SMP and the 8390 setup.
+/* SMP and the 8390 setup.
*
- * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
- * a page register that controls bank and packet buffer access. We guard
- * this with ei_local->page_lock. Nobody should assume or set the page other
- * than zero when the lock is not held. Lock holders must restore page 0
- * before unlocking. Even pure readers must take the lock to protect in
- * page 0.
+ * The 8390 isn't exactly designed to be multithreaded on RX/TX. There is
+ * a page register that controls bank and packet buffer access. We guard
+ * this with ei_local->page_lock. Nobody should assume or set the page other
+ * than zero when the lock is not held. Lock holders must restore page 0
+ * before unlocking. Even pure readers must take the lock to protect in
+ * page 0.
*
- * To make life difficult the chip can also be very slow. We therefore can't
- * just use spinlocks. For the longer lockups we disable the irq the device
- * sits on and hold the lock. We must hold the lock because there is a dual
- * processor case other than interrupts (get stats/set multicast list in
- * parallel with each other and transmit).
+ * To make life difficult the chip can also be very slow. We therefore can't
+ * just use spinlocks. For the longer lockups we disable the irq the device
+ * sits on and hold the lock. We must hold the lock because there is a dual
+ * processor case other than interrupts (get stats/set multicast list in
+ * parallel with each other and transmit).
*
- * Note: in theory we can just disable the irq on the card _but_ there is
- * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
- * enter lock, take the queued irq. So we waddle instead of flying.
+ * Note: in theory we can just disable the irq on the card _but_ there is
+ * a latency on SMP irq delivery. So we can easily go "disable irq" "sync irqs"
+ * enter lock, take the queued irq. So we waddle instead of flying.
*
- * Finally by special arrangement for the purpose of being generally
- * annoying the transmit function is called bh atomic. That places
- * restrictions on the user context callers as disable_irq won't save
- * them.
+ * Finally by special arrangement for the purpose of being generally
+ * annoying the transmit function is called bh atomic. That places
+ * restrictions on the user context callers as disable_irq won't save
+ * them.
*
- * Additional explanation of problems with locking by Alan Cox:
+ * Additional explanation of problems with locking by Alan Cox:
*
- * "The author (me) didn't use spin_lock_irqsave because the slowness of the
- * card means that approach caused horrible problems like losing serial data
- * at 38400 baud on some chips. Remember many 8390 nics on PCI were ISA
- * chips with FPGA front ends.
+ * "The author (me) didn't use spin_lock_irqsave because the slowness of the
+ * card means that approach caused horrible problems like losing serial data
+ * at 38400 baud on some chips. Remember many 8390 nics on PCI were ISA
+ * chips with FPGA front ends.
*
- * Ok the logic behind the 8390 is very simple:
+ * Ok the logic behind the 8390 is very simple:
*
- * Things to know
- * - IRQ delivery is asynchronous to the PCI bus
- * - Blocking the local CPU IRQ via spin locks was too slow
- * - The chip has register windows needing locking work
+ * Things to know
+ * - IRQ delivery is asynchronous to the PCI bus
+ * - Blocking the local CPU IRQ via spin locks was too slow
+ * - The chip has register windows needing locking work
*
- * So the path was once (I say once as people appear to have changed it
- * in the mean time and it now looks rather bogus if the changes to use
- * disable_irq_nosync_irqsave are disabling the local IRQ)
+ * So the path was once (I say once as people appear to have changed it
+ * in the mean time and it now looks rather bogus if the changes to use
+ * disable_irq_nosync_irqsave are disabling the local IRQ)
*
+ * Take the page lock
+ * Mask the IRQ on chip
+ * Disable the IRQ (but not mask locally- someone seems to have
+ * broken this with the lock validator stuff)
+ * [This must be _nosync as the page lock may otherwise deadlock us]
*
- * Take the page lock
- * Mask the IRQ on chip
- * Disable the IRQ (but not mask locally- someone seems to have
- * broken this with the lock validator stuff)
- * [This must be _nosync as the page lock may otherwise
- * deadlock us]
- * Drop the page lock and turn IRQs back on
+ * Drop the page lock and turn IRQs back on
*
- * At this point an existing IRQ may still be running but we can't
- * get a new one
+ * At this point an existing IRQ may still be running but we can't
+ * get a new one
*
- * Take the lock (so we know the IRQ has terminated) but don't mask
+ * Take the lock (so we know the IRQ has terminated) but don't mask
* the IRQs on the processor
- * Set irqlock [for debug]
*
- * Transmit (slow as ****)
+ * Set irqlock [for debug]
*
- * re-enable the IRQ
+ * Transmit (slow as ****)
*
+ * re-enable the IRQ
*
- * We have to use disable_irq because otherwise you will get delayed
- * interrupts on the APIC bus deadlocking the transmit path.
+ * We have to use disable_irq because otherwise you will get delayed
+ * interrupts on the APIC bus deadlocking the transmit path.
*
- * Quite hairy but the chip simply wasn't designed for SMP and you can't
- * even ACK an interrupt without risking corrupting other parallel
- * activities on the chip." [lkml, 25 Jul 2007]
+ * Quite hairy but the chip simply wasn't designed for SMP and you can't
+ * even ACK an interrupt without risking corrupting other parallel
+ * activities on the chip." [lkml, 25 Jul 2007]
*/
-
-
/**
* ei_open - Open/initialize the board.
* @dev: network device to initialize
@@ -206,15 +201,15 @@ static int __ei_open(struct net_device *dev)
if (dev->watchdog_timeo <= 0)
dev->watchdog_timeo = TX_TIMEOUT;
- /*
- * Grab the page lock so we own the register set, then call
- * the init function.
+ /* Grab the page lock so we own the register set, then call
+ * the init function.
*/
spin_lock_irqsave(&ei_local->page_lock, flags);
__NS8390_init(dev, 1);
/* Set the flag before we drop the lock, That way the IRQ arrives
- after its set and we get no silly warnings */
+ * after its set and we get no silly warnings
+ */
netif_start_queue(dev);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
ei_local->irqlock = 0;
@@ -232,9 +227,7 @@ static int __ei_close(struct net_device *dev)
struct ei_device *ei_local = netdev_priv(dev);
unsigned long flags;
- /*
- * Hold the page lock during close
- */
+ /* Hold the page lock during close */
spin_lock_irqsave(&ei_local->page_lock, flags);
__NS8390_init(dev, 0);
@@ -261,8 +254,8 @@ static void __ei_tx_timeout(struct net_device *dev, unsigned int txqueue)
dev->stats.tx_errors++;
spin_lock_irqsave(&ei_local->page_lock, flags);
- txsr = ei_inb(e8390_base+EN0_TSR);
- isr = ei_inb(e8390_base+EN0_ISR);
+ txsr = ei_inb(e8390_base + EN0_TSR);
+ isr = ei_inb(e8390_base + EN0_ISR);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
netdev_dbg(dev, "Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d\n",
@@ -308,25 +301,24 @@ static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
char *data = skb->data;
if (skb->len < ETH_ZLEN) {
- memset(buf, 0, ETH_ZLEN); /* more efficient than doing just the needed bits */
+ /* More efficient than doing just the needed bits */
+ memset(buf, 0, ETH_ZLEN);
memcpy(buf, data, skb->len);
send_length = ETH_ZLEN;
data = buf;
}
/* Mask interrupts from the ethercard.
- SMP: We have to grab the lock here otherwise the IRQ handler
- on another CPU can flip window and race the IRQ mask set. We end
- up trashing the mcast filter not disabling irqs if we don't lock */
+ * SMP: We have to grab the lock here otherwise the IRQ handler
+ * on another CPU can flip window and race the IRQ mask set. We end
+ * up trashing the mcast filter not disabling irqs if we don't lock.
+ */
spin_lock_irqsave(&ei_local->page_lock, flags);
ei_outb_p(0x00, e8390_base + EN0_IMR);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
-
- /*
- * Slow phase with lock held.
- */
+ /* Slow phase with lock held. */
disable_irq_nosync_lockdep_irqsave(dev->irq, &flags);
@@ -334,8 +326,7 @@ static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
ei_local->irqlock = 1;
- /*
- * We have two Tx slots available for use. Find the first free
+ /* We have two Tx slots available for use. Find the first free
* slot, and then perform some sanity checks. With two Tx bufs,
* you get very close to transmitting back-to-back packets. With
* only one Tx buf, the transmitter sits idle while you reload the
@@ -347,18 +338,18 @@ static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
ei_local->tx1 = send_length;
if ((netif_msg_tx_queued(ei_local)) &&
ei_local->tx2 > 0)
- netdev_dbg(dev,
- "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
- ei_local->tx2, ei_local->lasttx, ei_local->txing);
+ netdev_dbg(dev, "idle transmitter tx2=%d, lasttx=%d, txing=%d\n",
+ ei_local->tx2, ei_local->lasttx,
+ ei_local->txing);
} else if (ei_local->tx2 == 0) {
- output_page = ei_local->tx_start_page + TX_PAGES/2;
+ output_page = ei_local->tx_start_page + TX_PAGES / 2;
ei_local->tx2 = send_length;
if ((netif_msg_tx_queued(ei_local)) &&
ei_local->tx1 > 0)
- netdev_dbg(dev,
- "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
- ei_local->tx1, ei_local->lasttx, ei_local->txing);
- } else { /* We should never get here. */
+ netdev_dbg(dev, "idle transmitter, tx1=%d, lasttx=%d, txing=%d\n",
+ ei_local->tx1, ei_local->lasttx,
+ ei_local->txing);
+ } else { /* We should never get here. */
netif_dbg(ei_local, tx_err, dev,
"No Tx buffers free! tx1=%d tx2=%d last=%d\n",
ei_local->tx1, ei_local->tx2, ei_local->lasttx);
@@ -371,8 +362,7 @@ static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
return NETDEV_TX_BUSY;
}
- /*
- * Okay, now upload the packet and trigger a send if the transmitter
+ /* Okay, now upload the packet and trigger a send if the transmitter
* isn't already sending. If it is busy, the interrupt handler will
* trigger the send later, upon receiving a Tx done interrupt.
*/
@@ -389,8 +379,9 @@ static netdev_tx_t __ei_start_xmit(struct sk_buff *skb,
ei_local->tx2 = -1;
ei_local->lasttx = -2;
}
- } else
+ } else {
ei_local->txqueue++;
+ }
if (ei_local->tx1 && ei_local->tx2)
netif_stop_queue(dev);
@@ -429,15 +420,12 @@ static irqreturn_t __ei_interrupt(int irq, void *dev_id)
int interrupts, nr_serviced = 0;
struct ei_device *ei_local = netdev_priv(dev);
- /*
- * Protect the irq test too.
- */
+ /* Protect the irq test too. */
spin_lock(&ei_local->page_lock);
if (ei_local->irqlock) {
- /*
- * This might just be an interrupt for a PCI device sharing
+ /* This might just be an interrupt for a PCI device sharing
* this line
*/
netdev_err(dev, "Interrupted while interrupts are masked! isr=%#2x imr=%#2x\n",
@@ -448,7 +436,7 @@ static irqreturn_t __ei_interrupt(int irq, void *dev_id)
}
/* Change to page 0 and read the intr status reg. */
- ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
netif_dbg(ei_local, intr, dev, "interrupt(isr=%#2.2x)\n",
ei_inb_p(e8390_base + EN0_ISR));
@@ -462,9 +450,9 @@ static irqreturn_t __ei_interrupt(int irq, void *dev_id)
interrupts = 0;
break;
}
- if (interrupts & ENISR_OVER)
+ if (interrupts & ENISR_OVER) {
ei_rx_overrun(dev);
- else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
+ } else if (interrupts & (ENISR_RX + ENISR_RX_ERR)) {
/* Got a good (?) packet. */
ei_receive(dev);
}
@@ -475,30 +463,39 @@ static irqreturn_t __ei_interrupt(int irq, void *dev_id)
ei_tx_err(dev);
if (interrupts & ENISR_COUNTERS) {
- dev->stats.rx_frame_errors += ei_inb_p(e8390_base + EN0_COUNTER0);
- dev->stats.rx_crc_errors += ei_inb_p(e8390_base + EN0_COUNTER1);
- dev->stats.rx_missed_errors += ei_inb_p(e8390_base + EN0_COUNTER2);
- ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
+ dev->stats.rx_frame_errors +=
+ ei_inb_p(e8390_base + EN0_COUNTER0);
+ dev->stats.rx_crc_errors +=
+ ei_inb_p(e8390_base + EN0_COUNTER1);
+ dev->stats.rx_missed_errors +=
+ ei_inb_p(e8390_base + EN0_COUNTER2);
+ /* Ack intr. */
+ ei_outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR);
}
/* Ignore any RDC interrupts that make it back to here. */
if (interrupts & ENISR_RDC)
ei_outb_p(ENISR_RDC, e8390_base + EN0_ISR);
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START,
+ e8390_base + E8390_CMD);
}
if (interrupts && (netif_msg_intr(ei_local))) {
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START,
+ e8390_base + E8390_CMD);
if (nr_serviced >= MAX_SERVICE) {
/* 0xFF is valid for a card removal */
if (interrupts != 0xFF)
netdev_warn(dev, "Too much work at interrupt, status %#2.2x\n",
interrupts);
- ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
+ /* Ack. most intrs. */
+ ei_outb_p(ENISR_ALL, e8390_base + EN0_ISR);
} else {
- netdev_warn(dev, "unknown interrupt %#2x\n", interrupts);
- ei_outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
+ netdev_warn(dev, "unknown interrupt %#2x\n",
+ interrupts);
+ /* Ack. all intrs. */
+ ei_outb_p(0xff, e8390_base + EN0_ISR);
}
}
spin_unlock(&ei_local->page_lock);
@@ -532,30 +529,22 @@ static void ei_tx_err(struct net_device *dev)
{
unsigned long e8390_base = dev->base_addr;
/* ei_local is used on some platforms via the EI_SHIFT macro */
- struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
- unsigned char txsr = ei_inb_p(e8390_base+EN0_TSR);
- unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
-
-#ifdef VERBOSE_ERROR_DUMP
- netdev_dbg(dev, "transmitter error (%#2x):", txsr);
- if (txsr & ENTSR_ABT)
- pr_cont(" excess-collisions ");
- if (txsr & ENTSR_ND)
- pr_cont(" non-deferral ");
- if (txsr & ENTSR_CRS)
- pr_cont(" lost-carrier ");
- if (txsr & ENTSR_FU)
- pr_cont(" FIFO-underrun ");
- if (txsr & ENTSR_CDH)
- pr_cont(" lost-heartbeat ");
- pr_cont("\n");
-#endif
-
+ struct ei_device *ei_local = netdev_priv(dev);
+ unsigned char txsr = ei_inb_p(e8390_base + EN0_TSR);
+ unsigned char tx_was_aborted = txsr & (ENTSR_ABT + ENTSR_FU);
+
+ if (netif_msg_tx_err(ei_local)) {
+ netdev_err(dev, "Transmitter error %#2x ( %s%s%s%s%s)", txsr,
+ (txsr & ENTSR_ABT) ? "excess-collisions " : "",
+ (txsr & ENTSR_ND) ? "non-deferral " : "",
+ (txsr & ENTSR_CRS) ? "lost-carrier " : "",
+ (txsr & ENTSR_FU) ? "FIFO-underrun " : "",
+ (txsr & ENTSR_CDH) ? "lost-heartbeat " : "");
+ }
ei_outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
-
- if (tx_was_aborted)
+ if (tx_was_aborted) {
ei_tx_intr(dev);
- else {
+ } else {
dev->stats.tx_errors++;
if (txsr & ENTSR_CRS)
dev->stats.tx_carrier_errors++;
@@ -582,8 +571,7 @@ static void ei_tx_intr(struct net_device *dev)
ei_outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
- /*
- * There are two Tx buffers, see which one finished, and trigger
+ /* There are two Tx buffers, see which one finished, and trigger
* the send of another one if it exists.
*/
ei_local->txqueue--;
@@ -595,12 +583,14 @@ static void ei_tx_intr(struct net_device *dev)
ei_local->tx1 = 0;
if (ei_local->tx2 > 0) {
ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
+ NS8390_trigger_send(dev, ei_local->tx2,
+ ei_local->tx_start_page + 6);
netif_trans_update(dev);
ei_local->tx2 = -1,
ei_local->lasttx = 2;
- } else
+ } else {
ei_local->lasttx = 20, ei_local->txing = 0;
+ }
} else if (ei_local->tx2 < 0) {
if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
pr_err("%s: bogus last_tx_buffer %d, tx2=%d\n",
@@ -608,23 +598,27 @@ static void ei_tx_intr(struct net_device *dev)
ei_local->tx2 = 0;
if (ei_local->tx1 > 0) {
ei_local->txing = 1;
- NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
+ NS8390_trigger_send(dev, ei_local->tx1,
+ ei_local->tx_start_page);
netif_trans_update(dev);
ei_local->tx1 = -1;
ei_local->lasttx = 1;
- } else
+ } else {
ei_local->lasttx = 10, ei_local->txing = 0;
- } /* else
- netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
- ei_local->lasttx);
-*/
+ }
+ }
+ /* else {
+ * netdev_warn(dev, "unexpected TX-done interrupt, lasttx=%d\n",
+ * ei_local->lasttx);
+ * }
+ */
/* Minimize Tx latency: update the statistics after we restart TXing. */
if (status & ENTSR_COL)
dev->stats.collisions++;
- if (status & ENTSR_PTX)
+ if (status & ENTSR_PTX) {
dev->stats.tx_packets++;
- else {
+ } else {
dev->stats.tx_errors++;
if (status & ENTSR_ABT) {
dev->stats.tx_aborted_errors++;
@@ -658,26 +652,29 @@ static void ei_receive(struct net_device *dev)
unsigned short current_offset;
int rx_pkt_count = 0;
struct e8390_pkt_hdr rx_frame;
- int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
+ int num_rx_pages = ei_local->stop_page - ei_local->rx_start_page;
while (++rx_pkt_count < 10) {
int pkt_len, pkt_stat;
/* Get the rx page (incoming packet pointer). */
- ei_outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
rxing_page = ei_inb_p(e8390_base + EN1_CURPAG);
- ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
- /* Remove one frame from the ring. Boundary is always a page behind. */
+ /* Remove one frame from the ring.
+ * Boundary is always a page behind.
+ */
this_frame = ei_inb_p(e8390_base + EN0_BOUNDARY) + 1;
if (this_frame >= ei_local->stop_page)
this_frame = ei_local->rx_start_page;
- /* Someday we'll omit the previous, iff we never get this message.
- (There is at least one clone claimed to have a problem.)
-
- Keep quiet if it looks like a card removal. One problem here
- is that some clones crash in roughly the same way.
+ /* Someday we'll omit the previous, if we never get
+ * this message. (There is at least one clone claimed
+ * to have a problem.)
+ *
+ * Keep quiet if it looks like a card removal. One problem
+ * here is that some clones crash in roughly the same way.
*/
if ((netif_msg_rx_status(ei_local)) &&
this_frame != ei_local->current_page &&
@@ -695,17 +692,19 @@ static void ei_receive(struct net_device *dev)
pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
pkt_stat = rx_frame.status;
- next_frame = this_frame + 1 + ((pkt_len+4)>>8);
+ next_frame = this_frame + 1 + ((pkt_len + 4) >> 8);
- /* Check for bogosity warned by 3c503 book: the status byte is never
- written. This happened a lot during testing! This code should be
- cleaned up someday. */
+ /* Check for bogosity warned by 3c503 book: the status byte is
+ * never written. This happened a lot during testing! This code
+ * should be cleaned up someday.
+ */
if (rx_frame.next != next_frame &&
rx_frame.next != next_frame + 1 &&
rx_frame.next != next_frame - num_rx_pages &&
rx_frame.next != next_frame + 1 - num_rx_pages) {
ei_local->current_page = rxing_page;
- ei_outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
+ ei_outb(ei_local->current_page - 1,
+ e8390_base + EN0_BOUNDARY);
dev->stats.rx_errors++;
continue;
}
@@ -721,24 +720,22 @@ static void ei_receive(struct net_device *dev)
struct sk_buff *skb;
skb = netdev_alloc_skb(dev, pkt_len + 2);
- if (skb == NULL) {
- netif_err(ei_local, rx_err, dev,
- "Couldn't allocate a sk_buff of size %d\n",
- pkt_len);
+ if (!skb) {
dev->stats.rx_dropped++;
break;
- } else {
- skb_reserve(skb, 2); /* IP headers on 16 byte boundaries */
- skb_put(skb, pkt_len); /* Make room */
- ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
- skb->protocol = eth_type_trans(skb, dev);
- if (!skb_defer_rx_timestamp(skb))
- netif_rx(skb);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += pkt_len;
- if (pkt_stat & ENRSR_PHY)
- dev->stats.multicast++;
}
+ /* IP headers on 16 byte boundaries */
+ skb_reserve(skb, 2);
+ skb_put(skb, pkt_len); /* Make room */
+ ei_block_input(dev, pkt_len, skb,
+ current_offset + sizeof(rx_frame));
+ skb->protocol = eth_type_trans(skb, dev);
+ if (!skb_defer_rx_timestamp(skb))
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pkt_len;
+ if (pkt_stat & ENRSR_PHY)
+ dev->stats.multicast++;
} else {
netif_err(ei_local, rx_err, dev,
"bogus packet: status=%#2x nxpg=%#2x size=%d\n",
@@ -751,19 +748,22 @@ static void ei_receive(struct net_device *dev)
}
next_frame = rx_frame.next;
- /* This _should_ never happen: it's here for avoiding bad clones. */
+ /* This _should_ never happen:
+ * it's here for avoiding bad clones.
+ */
if (next_frame >= ei_local->stop_page) {
netdev_notice(dev, "next frame inconsistency, %#2x\n",
next_frame);
next_frame = ei_local->rx_start_page;
}
ei_local->current_page = next_frame;
- ei_outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
+ ei_outb_p(next_frame - 1, e8390_base + EN0_BOUNDARY);
}
/* We used to also ack ENISR_OVER here, but that would sometimes mask
- a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
- ei_outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
+ * a real overrun, leaving the 8390 in a stopped state with rec'vr off.
+ */
+ ei_outb_p(ENISR_RX + ENISR_RX_ERR, e8390_base + EN0_ISR);
}
/**
@@ -786,18 +786,16 @@ static void ei_rx_overrun(struct net_device *dev)
/* ei_local is used on some platforms via the EI_SHIFT macro */
struct ei_device *ei_local __maybe_unused = netdev_priv(dev);
- /*
- * Record whether a Tx was in progress and then issue the
+ /* Record whether a Tx was in progress and then issue the
* stop command.
*/
- was_txing = ei_inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
+ was_txing = ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS;
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_STOP, e8390_base + E8390_CMD);
netif_dbg(ei_local, rx_err, dev, "Receiver overrun\n");
dev->stats.rx_over_errors++;
- /*
- * Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
+ /* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
* Early datasheets said to poll the reset bit, but now they say that
* it "is not a reliable indicator and subsequently should be ignored."
* We wait at least 10ms.
@@ -805,47 +803,44 @@ static void ei_rx_overrun(struct net_device *dev)
mdelay(10);
- /*
- * Reset RBCR[01] back to zero as per magic incantation.
- */
- ei_outb_p(0x00, e8390_base+EN0_RCNTLO);
- ei_outb_p(0x00, e8390_base+EN0_RCNTHI);
+ /* Reset RBCR[01] back to zero as per magic incantation. */
+ ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
+ ei_outb_p(0x00, e8390_base + EN0_RCNTHI);
- /*
- * See if any Tx was interrupted or not. According to NS, this
+ /* See if any Tx was interrupted or not. According to NS, this
* step is vital, and skipping it will cause no end of havoc.
*/
if (was_txing) {
- unsigned char tx_completed = ei_inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
+ unsigned char tx_completed = ei_inb_p(e8390_base + EN0_ISR) &
+ (ENISR_TX + ENISR_TX_ERR);
+
if (!tx_completed)
must_resend = 1;
}
- /*
- * Have to enter loopback mode and then restart the NIC before
+ /* Have to enter loopback mode and then restart the NIC before
* you are allowed to slurp packets up off the ring.
*/
+
ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
- ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START,
+ e8390_base + E8390_CMD);
+
+ /* Clear the Rx ring of all the debris, and ack the interrupt. */
- /*
- * Clear the Rx ring of all the debris, and ack the interrupt.
- */
ei_receive(dev);
- ei_outb_p(ENISR_OVER, e8390_base+EN0_ISR);
+ ei_outb_p(ENISR_OVER, e8390_base + EN0_ISR);
+
+ /* Leave loopback mode, and resend any packet that got stopped */
- /*
- * Leave loopback mode, and resend any packet that got stopped.
- */
ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
if (must_resend)
- ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS,
+ e8390_base + E8390_CMD);
}
-/*
- * Collect the stats. This is called unlocked and from several contexts.
- */
+/* Collect the stats. This is called unlocked and from several contexts. */
static struct net_device_stats *__ei_get_stats(struct net_device *dev)
{
@@ -867,8 +862,7 @@ static struct net_device_stats *__ei_get_stats(struct net_device *dev)
return &dev->stats;
}
-/*
- * Form the 64 bit 8390 multicast table from the linked list of addresses
+/* Form the 64 bit 8390 multicast table from the linked list of addresses
* associated with this dev structure.
*/
@@ -878,11 +872,10 @@ static inline void make_mc_bits(u8 *bits, struct net_device *dev)
netdev_for_each_mc_addr(ha, dev) {
u32 crc = ether_crc(ETH_ALEN, ha->addr);
- /*
- * The 8390 uses the 6 most significant bits of the
+ /* The 8390 uses the 6 most significant bits of the
* CRC to index the multicast table.
*/
- bits[crc>>29] |= (1<<((crc>>26)&7));
+ bits[crc >> 29] |= (1 << ((crc >> 26) & 7));
}
}
@@ -900,15 +893,16 @@ static void do_set_multicast_list(struct net_device *dev)
int i;
struct ei_device *ei_local = netdev_priv(dev);
- if (!(dev->flags&(IFF_PROMISC|IFF_ALLMULTI))) {
+ if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) {
memset(ei_local->mcfilter, 0, 8);
if (!netdev_mc_empty(dev))
make_mc_bits(ei_local->mcfilter, dev);
- } else
- memset(ei_local->mcfilter, 0xFF, 8); /* mcast set to accept-all */
+ } else {
+ /* mcast set to accept-all */
+ memset(ei_local->mcfilter, 0xFF, 8);
+ }
- /*
- * DP8390 manuals don't specify any magic sequence for altering
+ /* DP8390 manuals don't specify any magic sequence for altering
* the multicast regs on an already running card. To be safe, we
* ensure multicast mode is off prior to loading up the new hash
* table. If this proves to be not enough, we can always resort
@@ -924,16 +918,17 @@ static void do_set_multicast_list(struct net_device *dev)
ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
ei_outb_p(E8390_NODMA + E8390_PAGE1, e8390_base + E8390_CMD);
for (i = 0; i < 8; i++) {
- ei_outb_p(ei_local->mcfilter[i], e8390_base + EN1_MULT_SHIFT(i));
+ ei_outb_p(ei_local->mcfilter[i],
+ e8390_base + EN1_MULT_SHIFT(i));
#ifndef BUG_83C690
- if (ei_inb_p(e8390_base + EN1_MULT_SHIFT(i)) != ei_local->mcfilter[i])
- netdev_err(dev, "Multicast filter read/write mismap %d\n",
- i);
+ if (ei_inb_p(e8390_base + EN1_MULT_SHIFT(i)) !=
+ ei_local->mcfilter[i])
+ netdev_err(dev, "Multicast filter read/write mismap %d\n", i);
#endif
}
ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
- if (dev->flags&IFF_PROMISC)
+ if (dev->flags & IFF_PROMISC)
ei_outb_p(E8390_RXCONFIG | 0x18, e8390_base + EN0_RXCR);
else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev))
ei_outb_p(E8390_RXCONFIG | 0x08, e8390_base + EN0_RXCR);
@@ -941,10 +936,9 @@ static void do_set_multicast_list(struct net_device *dev)
ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR);
}
-/*
- * Called without lock held. This is invoked from user context and may
- * be parallel to just about everything else. Its also fairly quick and
- * not called too often. Must protect against both bh and irq users
+/* Called without lock held. This is invoked from user context and may
+ * be parallel to just about everything else. Its also fairly quick and
+ * not called too often. Must protect against both bh and irq users
*/
static void __ei_set_multicast_list(struct net_device *dev)
@@ -969,9 +963,6 @@ static void ethdev_setup(struct net_device *dev)
{
struct ei_device *ei_local = netdev_priv(dev);
- if ((msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
- pr_info("%s", version);
-
ether_setup(dev);
spin_lock_init(&ei_local->page_lock);
@@ -991,9 +982,6 @@ static struct net_device *____alloc_ei_netdev(int size)
NET_NAME_UNKNOWN, ethdev_setup);
}
-
-
-
/* This page of functions should be 8390 generic */
/* Follow National Semi's recommendations for initializing the "NIC". */
@@ -1017,7 +1005,8 @@ static void __NS8390_init(struct net_device *dev, int startp)
if (sizeof(struct e8390_pkt_hdr) != 4)
panic("8390.c: header struct mispacked\n");
/* Follow National Semi's recommendations for initing the DP83902. */
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD); /* 0x21 */
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_STOP,
+ e8390_base + E8390_CMD); /* 0x21 */
ei_outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
/* Clear the remote byte count registers. */
ei_outb_p(0x00, e8390_base + EN0_RCNTLO);
@@ -1027,10 +1016,13 @@ static void __NS8390_init(struct net_device *dev, int startp)
ei_outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
/* Set the transmit page and receive ring. */
ei_outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
- ei_local->tx1 = ei_local->tx2 = 0;
+ ei_local->tx1 = 0;
+ ei_local->tx2 = 0;
ei_outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
- ei_outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
- ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
+ /* 3c503 says 0x3f,NS0x26*/
+ ei_outb_p(ei_local->stop_page - 1, e8390_base + EN0_BOUNDARY);
+ /* assert boundary+1 */
+ ei_local->current_page = ei_local->rx_start_page;
ei_outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
/* Clear the pending interrupts and mask. */
ei_outb_p(0xFF, e8390_base + EN0_ISR);
@@ -1038,25 +1030,28 @@ static void __NS8390_init(struct net_device *dev, int startp)
/* Copy the station address into the DS8390 registers. */
- ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base+E8390_CMD); /* 0x61 */
+ ei_outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
+ e8390_base + E8390_CMD); /* 0x61 */
for (i = 0; i < 6; i++) {
ei_outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS_SHIFT(i));
- if ((netif_msg_probe(ei_local)) &&
- ei_inb_p(e8390_base + EN1_PHYS_SHIFT(i)) != dev->dev_addr[i])
+ if ((netif_msg_probe(ei_local)) && ei_inb_p(e8390_base +
+ EN1_PHYS_SHIFT(i)) != dev->dev_addr[i])
netdev_err(dev,
"Hw. address read/write mismap %d\n", i);
}
ei_outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_STOP, e8390_base + E8390_CMD);
- ei_local->tx1 = ei_local->tx2 = 0;
+ ei_local->tx1 = 0;
+ ei_local->tx2 = 0;
ei_local->txing = 0;
if (startp) {
ei_outb_p(0xff, e8390_base + EN0_ISR);
ei_outb_p(ENISR_ALL, e8390_base + EN0_IMR);
- ei_outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base+E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START,
+ e8390_base + E8390_CMD);
ei_outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
/* 3c503 TechMan says rxconfig only after the NIC is started. */
ei_outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
@@ -1065,15 +1060,16 @@ static void __NS8390_init(struct net_device *dev, int startp)
}
/* Trigger a transmit start, assuming the length is valid.
- Always called with the page lock held */
+ * Always called with the page lock held.
+ */
static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
- int start_page)
+ int start_page)
{
unsigned long e8390_base = dev->base_addr;
struct ei_device *ei_local __attribute((unused)) = netdev_priv(dev);
- ei_outb_p(E8390_NODMA+E8390_PAGE0, e8390_base+E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_PAGE0, e8390_base + E8390_CMD);
if (ei_inb_p(e8390_base + E8390_CMD) & E8390_TRANS) {
netdev_warn(dev, "trigger_send() called with the transmitter busy\n");
@@ -1082,5 +1078,5 @@ static void NS8390_trigger_send(struct net_device *dev, unsigned int length,
ei_outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
ei_outb_p(length >> 8, e8390_base + EN0_TCNTHI);
ei_outb_p(start_page, e8390_base + EN0_TPSR);
- ei_outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base+E8390_CMD);
+ ei_outb_p(E8390_NODMA + E8390_TRANS + E8390_START, e8390_base + E8390_CMD);
}
--
2.20.1
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