Commit Graph

56 Commits

Author SHA1 Message Date
Michael Chan
c1d2a1965a [TG3]: Add PHY workaround for 5755M.
Some PHY trim values need to be fine-tuned on 5755M to be
IEEE-compliant.

Update version to 3.72.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-01-09 00:30:06 -08:00
Michael Chan
60189ddff0 [TG3]: Power down/up 5906 PHY correctly.
The 5906 PHY requires a special register bit to power down and up the
PHY.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-17 21:59:22 -08:00
Michael Chan
9d26e21342 [TG3]: Add TG3_FLG2_IS_NIC flag.
Add Tg3_FLG2_IS_NIC flag to unambiguously determine whether the
device is NIC or onboard.  Previously, the EEPROM_WRITE_PROT flag was
overloaded to also mean onboard.  With the separation, we can
support some devices that are onboard but do not use eeprom write
protect.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-07 00:21:14 -08:00
Michael Chan
b16250e3d1 [TG3]: Add 5709 self-test support.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:42 -07:00
Michael Chan
715116a126 [TG3]: Add 5709 PHY support.
Add support for the 5709 10/100 PHY.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:41 -07:00
Michael Chan
b5d3772ccb [TG3]: Add basic 5906 support.
Add support for the new 5709 device.  This is a new 10/100 Mbps chip.
The mailbox access and firmware interface are quite different from
all other tg3 chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:40 -07:00
Michael Chan
126a336822 [TG3]: Add 5722 and 5756 support.
Add IDs to support 5722 and 5756.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:38 -07:00
Michael Chan
130b8e4d0e [TG3]: Improve ASF heartbeat.
Change to a different ASF heartbeat message code to improve
reliability.

There were some reports of unintended resets on real time kernels
where the timer may be slow and cause the heartbeat to be late.
Netpoll will also have the same problem because the timer irq will
be unavailable.

Using the new heartbeat code, the ASF firmware will also check the
ring condition before resetting the chip when the heartbeat is
expiring.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:35 -07:00
Michael Chan
3d3ebe741b [TG3]: Improve 5704S autoneg.
Improve 5704S autoneg logic by using a serdes_counter field to keep
track of the transient states.  This eliminates a 200 msec busy
loop in the code.  Autoneg will take its course without the driver
busy waiting for it to finish.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-28 18:01:34 -07:00
Michael Chan
1b2a720506 [TG3]: Fix tx race condition
Fix a subtle race condition between tg3_start_xmit() and tg3_tx()
discovered by Herbert Xu <herbert@gondor.apana.org.au>:

CPU0					CPU1
tg3_start_xmit()
	if (tx_ring_full) {
		tx_lock
					tg3_tx()
						if (!netif_queue_stopped)
		netif_stop_queue()
		if (!tx_ring_full)
						update_tx_ring 
			netif_wake_queue()
		tx_unlock
	}

Even though tx_ring is updated before the if statement in tg3_tx() in
program order, it can be re-ordered by the CPU as shown above.  This
scenario can cause the tx queue to be stopped forever if tg3_tx() has
just freed up the entire tx_ring.  The possibility of this happening
should be very rare though.

The following changes are made:

1. Add memory barrier to fix the above race condition.

2. Eliminate the private tx_lock altogether and rely solely on
netif_tx_lock.  This eliminates one spinlock in tg3_start_xmit()
when the ring is full.

3. Because of 2, use netif_tx_lock in tg3_tx() before calling
netif_wake_queue().

4. Change TX_BUFFS_AVAIL to an inline function with a memory barrier.
Herbert and David suggested using the memory barrier instead of
volatile.

5. Check for the full wake queue condition before getting
netif_tx_lock in tg3_tx().  This reduces the number of unnecessary
spinlocks when the tx ring is full in a steady-state condition.

6. Update version to 3.65.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-08-07 21:46:02 -07:00
Michael Chan
52c0fd834e [TG3]: Add TSO workaround using GSO
Use GSO to workaround a rare TSO bug on some chips.  This hardware
bug may be triggered when the TSO header size is greater than 80
bytes.  When this condition is detected in a TSO packet, the driver
will use GSO to segment the packet to workaround the hardware bug.

Thanks to Juergen Kreileder <jk@blackdown.de> for reporting the
problem and collecting traces to help debug the problem.

And thanks to Herbert Xu <herbert@gondor.apana.org.au> for providing
the GSO mechanism that happens to be the perfect workaround for this
problem.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-30 14:11:57 -07:00
Michael Chan
1661394e78 [TG3]: Turn on hw fix for ASF problems
Clear a bit to enable a hardware fix for some ASF related problem.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-30 14:11:55 -07:00
Michael Chan
f92905deb9 [TG3]: Add rx BD workaround
Add workaround to limit the burst size of rx BDs being DMA'ed to the
chip.  This works around hardware errata on a number of 5750, 5752,
and 5755 chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-30 14:11:52 -07:00
Michael Chan
00b7050426 [TG3]: Convert to non-LLTX
Herbert Xu pointed out that it is unsafe to call netif_tx_disable()
from LLTX drivers because it uses dev->xmit_lock to synchronize
whereas LLTX drivers use private locks.

Convert tg3 to non-LLTX to fix this issue. tg3 is a lockless driver
where hard_start_xmit and tx completion handling can run concurrently
under normal conditions. A tx_lock is only needed to prevent
netif_stop_queue and netif_wake_queue race condtions when the queue
is full.

So whether we use LLTX or non-LLTX, it makes practically no
difference.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17 21:58:45 -07:00
Michael Chan
df3e654818 [TG3]: Add recovery logic when MMIOs are re-ordered
Add recovery logic when we suspect that the system is re-ordering
MMIOs. Re-ordered MMIOs to the send mailbox can cause bogus tx
completions and hit BUG_ON() in the tx completion path.

tg3 already has logic to handle re-ordered MMIOs by flushing the MMIOs
that must be strictly ordered (such as the send mailbox).  Determining
when to enable the flush is currently a manual process of adding known
chipsets to a list.

The new code replaces the BUG_ON() in the tx completion path with the
call to tg3_tx_recover(). It will set the TG3_FLAG_MBOX_WRITE_REORDER
flag and reset the chip later in the workqueue to recover and start
flushing MMIOs to the mailbox.

A message to report the problem will be printed. We will then decide
whether or not to add the host bridge to the list of chipsets that do
re-ordering.

We may add some additional code later to print the host bridge's ID so
that the user can report it more easily.

The assumption that re-ordering can only happen on x86 systems is also
removed.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-17 21:26:26 -07:00
David S. Miller
f49639e643 [TG3]: Handle Sun onboard tg3 chips more correctly.
Get rid of all the SUN_570X logic and instead:

1) Make sure MEMARB_ENABLE is set when we probe the SRAM
   for config information.  If that is off we will get
   timeouts.

2) Always try to sync with the firmware, if there is no
   firmware running do not treat it as an error and instead
   just report it the first time we notice this condition.

3) If there is no valid SRAM signature, assume the device
   is onboard by setting TG3_FLAG_EEPROM_WRITE_PROT.

Update driver version and release date.

With help from Michael Chan and Fabio Massimo Di Nitto.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-09 12:03:51 -07:00
Michael Chan
c424cb249d [TG3]: Add phy workaround
Add some PHY workaround code to reduce jitter on some PHYs.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-29 18:56:34 -07:00
Michael Chan
bbadf503d7 [TG3]: Speed up SRAM access (2nd version)
Speed up SRAM read and write functions if possible by using MMIO
instead of config. cycles. With this change, the post reset signature
done at the end of D3 power change must now be moved before the D3
power change.

IBM reported a problem on powerpc blades during ethtool self test that
was caused by the memory test taking excessively long. Config.  cycles
are very slow on powerpc and the memory test can take more than 10
seconds to complete using config. cycles.

David Miller informed me that an earlier version of the patch caused
problems on sparc64 systems with built-in tg3 chips. This version
fixes the problem by excluding all SUN built-in tg3 chips from doing
MMIO SRAM access.

TG3_FLAG_EEPROM_WRITE_PROT is also set unconditionally when
TG3_FLG2_SUN_570X is set. This should be sane as all SUN chips are
built-in and do not require Vaux switching.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-09 22:25:46 -07:00
Michael Chan
d2d746f83b [TG3]: Kill some less useful flags
Kill the TG3_FLAG_NO_{TX|RX}_PSEUDO_CSUM flags because they are not
very useful. This will free up some bits for new flags.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-04-09 22:25:44 -07:00
Michael Chan
d3c7b88697 [TG3]: Add 5755 nvram support
Add 5755 nvram support.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-23 01:28:25 -08:00
Michael Chan
af36e6b6d7 [TG3]: Add 5755 support
Add support for new chip 5755 which is very similar to 5787.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-23 01:28:06 -08:00
Michael Chan
c4e6575c78 [TG3]: Add firmware version info
Add fw_version information to ethtool -i.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:29:32 -08:00
Michael Chan
fcfa0a32c7 [TG3]: Add new one-shot MSI handler
Support one-shot MSI on 5787.

This one-shot MSI idea is credited to David Miller. In this mode, MSI
disables itself automatically after it is generated, saving the driver
a register access to disable it for NAPI.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:28:41 -08:00
Michael Chan
5a6f3074c2 [TG3]: Add new hard_start_xmit
Support 5787 hardware TSO using a new flag TG3_FLG2_HW_TSO_2.

Since the TSO interface is slightly different and these chips have
finally fixed the 4GB DMA problem and do not have the 40-bit DMA
problem, a new hard_start_xmit is used for these chips. All previous
chips will use the old hard_start_xmit that is now renamed
tg3_start_xmit_dma_bug().

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:28:05 -08:00
Michael Chan
1b27777a9b [TG3]: Add 5787 nvram support
Support additional nvrams and new nvram format for 5787 and 5754.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:27:48 -08:00
Michael Chan
d9ab5ad12b [TG3]: Add 5787 and 5754 basic support
Add basic support for 2 new chips 5787 and 5754.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-20 22:27:35 -08:00
Michael Chan
4a29cc2e50 [TG3]: 40-bit DMA workaround part 2
The 40-bit DMA workaround recently implemented for 5714, 5715, and
5780 needs to be expanded because there may be other tg3 devices
behind the EPB Express to PCIX bridge in the 5780 class device.

For example, some 4-port card or mother board designs have 5704 behind
the 5714.

All devices behind the EPB require the 40-bit DMA workaround.

Thanks to Chris Elmquist again for reporting the problem and testing
the patch.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-03-19 13:21:12 -08:00
Michael Chan
7faa006f94 [TG3]: Flush tg3_reset_task()
Make sure tg3_reset_task() is flushed in the close and suspend paths
as noted by Jeff Garzik.

In the close path, calling flush_scheduled_work() may cause deadlock
if linkwatch_event() is on the workqueue. linkwatch_event() will try
to get the rtnl_lock() which is already held by tg3_close(). So
instead, we set a flag in tg3_reset_task() and tg3_close() polls
the flag until it is cleared.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-02-02 17:29:28 -08:00
Michael Chan
ec41c7dfd5 [TG3]: Refine nvram locking
Add nvram lock count so that calls to tg3_nvram_lock()/unlock() can
be nested. Add error checking to all callers of tg3_nvram_lock()
where appropriate. To prevent nvram lock failures after halting the
firmware, it is also necessary to release firmware's nvram lock in
tg3_halt_cpu().

Update version to 3.48.

Based on David Miller's initial patch.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-17 02:40:55 -08:00
Chris Elmquist
091465d751 [TG3]: ethtool -d hangs PCIe systems
Resubmitting after recommendation to use GET_REG32_1() instead of
GET_REG32_LOOP(..., 1).  Retested.  Problem remains fixed.

Prevent tg3_get_regs() from reading reserved and undocumented registers
at RX_CPU_BASE and TX_CPU_BASE offsets which caused hostile behavior
on PCIe platforms.

Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-12-28 13:04:52 -08:00
Michael Chan
6921d201f7 [TG3]: Fix low power state
Fix the following bugs in tg3_set_power_state():

1. Both WOL and ASF flags require switching to aux power.

2. Add a missing handshake with firmware to enable WOL.

3. Turn off the PHY if both WOL and ASF are disabled.

4. Add nvram arbitration before halting the firmware.

5. Fix tg3_setup_copper_phy() to switch to 100Mbps when
   changing to low power state.

Update revision and date.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-12-13 21:15:53 -08:00
Michael Chan
28fbef78a4 [PATCH] tg3: fix ASF heartbeat
Change the ASF heart beat to 5 seconds for faster detection of system
crash. The driver sends the heartbeat every 2 seconds and the ASF
firmware will timeout and reset the device if no heartbeat is received
after 5 seconds. The old scheme of 2 minutes is ineffective.

tg3_write_mem_fast() is added to speed up the IO to send the heartbeat.
When no workaround is needed, it will use direct MMIO to memory space
to write to memory.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-10-28 16:07:30 -04:00
Michael Chan
a4e2b34784 [PATCH] tg3: add 5714/5715 support
Add complete support for 5714/5715. These chips are very similar to
5780 so the changes are very trivial. A TG3_FLG2_5780_CLASS flag is
added to identify these chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2005-10-28 16:07:29 -04:00
Michael Chan
c94e39418a [TG3]: 5780 PHY fixes
Fix 5780 PHY related problems:

1. MAC_RX_MODE reset must be done before setting up the MAC_MODE
   register on 5705_PLUS chips or the chip will stop receiving after
   a while. The MAC_RX_MODE reset is needed to prevent intermittently
   losing the first receive packet on serdes chips.

2. Skip MAC loopback test on 5780 because of hardware errata. Normal
   traffic including PHY loopback is not affected by the errata.

3. PHY loopback fails intermittently on 5708S and this is fixed by
   putting the PHY in loopback mode first before programming the MAC
   mode register. A MAC_RX_MODE reset is also added.

4. Return -EINVAL in tg3_nway_reset() if device is in TBI mode. Allow
   nway_reset if 5780S is in parallel detect mode.

5. Add missing PHY IDs in KNOWN_PHY_ID() macro.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-09-27 12:12:42 -07:00
Michael Chan
6892914fb7 [TG3]: Add indirect register method for 5703 behind ICH
This patch adds the new workaround for 5703 A1/A2 if it is behind
certain ICH bridges. The workaround disables memory and uses config.
cycles only to access all registers. The 5702/03 chips can mistakenly
decode the special cycles from the ICH chipsets as memory write cycles,
causing corruption of register and memory space. Only certain ICH
bridges will drive special cycles with non-zero data during the address
phase which can fall within the 5703's address range. This is not an ICH
bug as the PCI spec allows non-zero address during special cycles.
However, only these ICH bridges are known to drive non-zero addresses
during special cycles.

The indirect_lock is also changed to spin_lock_irqsave from spin_lock_bh
because it is used in irq handler when using the indirect method to
disable interrupts.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:50:42 -07:00
Michael Chan
09ee929ccc [TG3]: Add mailbox read method
This patch adds the mailbox read method and also adds an inline function
tw32_mailbox_f() for mailbox writes that require read flush.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:50:38 -07:00
Michael Chan
2009493065 [TG3]: Add basic register access function pointers
This patch adds the basic function pointers to do register accesses in
the fast path. This was suggested by David Miller. The idea is that
various register access methods for different hardware errata can easily
be implemented with these function pointers and performance will not be
degraded on chips that use normal register access methods.

The various register read write macros (e.g. tw32, tr32, tw32_mailbox)
are redefined to call the function pointers.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-08-29 15:50:12 -07:00
Michael Chan
747e8f8bff [TG3]: add 5780 fiber support
Add 5780S support by adding a new tg3_setup_fiber_mii_phy() function and
a timer function for parallel link detection. 5780S uses standard MII
registers for 1000BaseX and runs in GMII mode as opposed to TBI mode on
older serdes chips.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-25 12:33:22 -07:00
Michael Chan
fdfec1726b [TG3]: consolidate all DMA water mark settings
Consolidate all DMA watermark settings for standard and jumbo frames on
all chips in tg3_init_bufmgr_config() and add new settings for 5780.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-25 12:31:48 -07:00
Michael Chan
7e72aad48c [TG3]: add variable buffer size for standard ring
Add a new rx_pkt_buf_sz to the tg3 structure to support variable buffer
sizes on the standard ring.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-25 12:31:17 -07:00
Michael Chan
0f893dc6ec [TG3]: add 5780 basic jumbo frame support
Add basic jumbo frames support for 5780. This chip supports jumbo frames
on the standard receive ring without the jumbo ring. The
TG3_FLAG_JUMBO_ENABLE is changed to TG3_FLAG_JUMBO_RING_ENABLE to
indicate using the jumbo ring on 5704 and older chips. A new
TG3_FLG2_JUMBO_CAPABLE flag is added to indicate jumbo frames support
with or without the jumbo ring.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-25 12:30:38 -07:00
Michael Chan
4cf78e4fb6 [TG3]: add 5780 basic support
Add 5780 PCI IDs, chip IDs, and other basic support.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-25 12:29:19 -07:00
Michael Chan
d244c892c8 [TG3]: support for ethtool -C
Add support for ethtool -C with verification of user parameters.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-07-05 14:42:33 -07:00
David S. Miller
f47c11eecc [TG3]: Eliminate all hw IRQ handler spinlocks.
Move all driver spinlocks to be taken at sw IRQ
context only.

This fixes the skb_copy() we were doing with hw
IRQs disabled (which is illegal and triggers a
BUG() with HIGHMEM enabled).  It also simplifies
the locking all over the driver tremendously.

We accomplish this feat by creating a special
sequence to synchronize with the hw IRQ handler
using a binary state and synchronize_irq().
This idea is from Herbert Xu.

Thanks to Michael Chan for helping to track down
all of the race conditions in initial versions
of this code.

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-06-24 20:18:35 -07:00
David S. Miller
15f9850d3c [TG3]: Set minimal hw interrupt mitigation.
Even though we do software interrupt mitigation
via NAPI, it still helps to have some minimal
hw assisted mitigation.

This helps, particularly, on systems where register
I/O overhead is much greater than the CPU horsepower.

For example, it helps on NUMA systems.  In such cases
the PIO overhead to disable interrupts for NAPI accounts
for the majority of the packet processing cost.  The
CPU is fast enough such that only a single packet is
processed by each NAPI poll call.

Thanks to Michael Chan for reviewing this patch.

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-05-18 22:49:26 -07:00
David S. Miller
fac9b83ea7 [TG3]: Add tagged status support.
When supported, use the TAGGED interrupt processing support
the chip provides.  In this mode, instead of a "on/off" binary
semaphore, an incrementing tag scheme is used to ACK interrupts.

All MSI supporting chips support TAGGED mode, so the tg3_msi()
interrupt handler uses it unconditionally.  This invariant is
verified when MSI support is tested.

Since we can invoke tg3_poll() multiple times per interrupt under
high packet load, we fetch a new copy of the tag value in the
status block right before we actually do the work.

Also, because the tagged status tells the chip exactly which
work we have processed, we can make two optimizations:

1) tg3_restart_ints() need not check tg3_has_work()
2) the tg3_timer() need not poke the chip 10 times per
   second to keep from losing interrupt events

Based upon valuable feedback from Michael Chan <mchan@broadcom.com>

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-05-18 22:46:34 -07:00
Michael Chan
88b06bc26b [TG3]: Add msi support
Add MSI support for 5751 C0 and 5752.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-04-21 17:13:25 -07:00
Michael Chan
e6af301be3 [TG3]: Add nvram lock-out support for 5752 TPM
Add support for the NVRAM lock-out feature for TPM in 5752. If lock-out
is enabled, certain NVRAM registers cannot be written to.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-04-21 17:12:05 -07:00
Michael Chan
361b4ac29b [TG3]: Add nvram detection for 5752
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-04-21 17:11:21 -07:00
Michael Chan
3e7d83bc96 [TG3]: Add GPIO3 for 5752
Add bit definitions for the new GPIO3 in 5752. GPIO3 must be driven as
output when it is unused.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2005-04-21 17:10:36 -07:00