Various drivers are using implementations of ethtool_ops::get_link
that are equivalent to the default ethtool_op_get_link(). Change
them to use that instead.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This driver now uses Generic Receive Offload, not the older LRO.
Change references to LRO in names and comments.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Long before this driver went into mainline, it had support for
multiple TX queues per port, with lockless TX enabled. Since Linux
did not know anything of this, filling up any hardware TX queue would
stop the core TX queue and multiple hardware TX queues could fill up
before the scheduler reacted. Thus it was necessary to keep a count
of how many TX queues were stopped and to wake the core TX queue only
when all had free space again.
The driver also previously (ab)used the per-hardware-queue stopped
flag as a counter to deal with various things that can inhibit TX, but
it no longer does that.
Remove the per-channel tx_stop_count, tx_stop_lock and
per-hardware-queue stopped count and just use the networking core
queue state directly.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Call netif_napi_{add,del}() on the NAPI contexts in the new and
old channels, respectively.
Since efx_init_napi() cannot fail, make its return type void.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
If we are using a legacy interrupt, our IRQ may be shared and our
interrupt handler may be called even though interrupts are disabled on
the NIC. When we change ring sizes, we reallocate the event queue and
the interrupt handler may use an invalid pointer when called for
another device's interrupt.
Maintain a legacy_irq_enabled flag and test that at the top of the
interrupt handler. Note that this problem results from the need to
work around broken INT_ISR0 reads, and does not affect the legacy
interrupt handler for Falcon A1.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Move search_depth arrays into per-table state.
Define initialisation function efx_filter_init_rx() which sets
everything apart from the match fields.
Define efx_filter_set_{ipv4_local,ipv4_full,eth_local}() to set the
match fields. This allows some simplification of callers and later
support for additional protocols and more flexible matching using
multiple calls to these functions.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
The separation between filter tables is largely an internal detail
and it may be removed in future hardware. To prepare for that:
- Merge table ID with filter index to make an opaque filter ID
- Wrap efx_filter_table_clear() with a function that clears filters
from both RX tables, which is all that the current caller requires
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Add message at start of self-test and increase log level of message at
end of self-test, so that any other messages produced during the
test are clearly associated with it.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Whenever we add DMA descriptors to a TX ring and update the ring
pointer, the TX DMA engine must first read the new DMA descriptors and
then start reading packet data. However, all released Solarflare 10G
controllers have a 'TX push' feature that allows us to reduce latency
by writing the first new DMA descriptor along with the pointer update.
This is only useful when the queue is empty. The hardware should
ignore the pushed descriptor if the queue is not empty, but this check
is buggy, so we must do it in software.
In order to tell whether a TX queue is empty, we need to compare the
previous transmission count (write_count) and completion count
(read_count). However, if we do that every time we update the ring
pointer then read_count may ping-pong between the caches of two CPUs
running the transmission and completion paths for the queue.
Therefore, we split the check for an empty queue between the
completion path and the transmission path:
- Add an empty_read_count field representing a point at which the
completion path saw the TX queue as empty.
- Add an old_write_count field for use on the completion path.
- On the completion path, whenever read_count reaches or passes
old_write_count the TX queue may be empty. We then read
write_count, set empty_read_count if read_count == write_count,
and update old_write_count.
- On the transmission path, we read empty_read_count. If it's set, we
compare it with the value of write_count before the current set of
descriptors was added. If they match, the queue really is empty and
we can use TX push.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
It is not necessary to serialise writes to the paged 128-bit
registers. However, if we don't then we must always write the last
dword separately, not as part of a qword write.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Document exactly which registers and functions have special behaviour,
and why races on writes to descriptor pointers are safe.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Place the regularly updated fields (locks, MAC stats, etc.) on a
separate cache-line from fields which are mostly constant. This
should reduce cache misses for access to the latter on the data path.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
For some reason we failed to make this change when perm_addr was
introduced.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We only have direct access to MDIO on Falcon, so move this out of
struct efx_nic.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We only have direct access to SPI on Falcon, so move all this state
out of struct efx_nic.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The ethtool EEPROM interface is really meant for exposing chip
configuration, not BootROM configuration.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If the Falcon board config is invalid, we cannot proceed - we do not
have a valid board type to pass to falcon_probe_board(), and if we
kluge that to work with an unknown board then other initialisation
code will crash.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The mcfw *never* sends CMDDONE when rebooting. Changing this so that it always
sends CMDDONE *before* REBOOT is easy on Siena, but it's not obvious that we
could guarantee to be able to implement this on future hardware.
Given this, I'm less convinced that the protocol should be changed.
To reiterate the failure mode: The driver sees this:
issue command
receive REBOOT event
Was that reboot event sent before the command was issued, or in
response to the command? If the former then there will be a subsequent
CMDDONE event, if the latter, then there will be no CMDDONE event.
Options to resolve this are:
1. REBOOT always completes an outstanding mcdi request, and we set
the credits count to ignore a subsequent CMDDONE event with
mismatching seqno.
2. REBOOT never completes an outstanding mcdi request. If there is
no CMDDONE event then we rely on the mcdi timeout code to complete
the outstanding request, incurring a 10s delay.
I'd argue that (2) is tidier, but that incurring a 10s delay is a little
needless. Let's go with (1).
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When we enable PMA/PMD loopback this automatically sets RXIN_SEL
(inverse polarity for RXIN). We need to clear that bit during the
soft-reset sequence, as it is not done automatically.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
We do not want to shut down the board based on a fault that has
already been cleared.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Set both the 'maximum' and critical temperature limits for LM87
hardware monitors on Falcon boards. Do not shut down a port until the
critical temperature is reached, but warn as soon as the 'maximum'
temperature is reached.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Some errors are expected, e.g. when sending new commands to an MC
running old firmware. Only the caller of efx_mcdi_rpc() can decide
what is a real error. Therefore log the error responses with
netif_dbg().
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use vzalloc() and vzalloc_node() in net drivers
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Jon Mason <jon.mason@exar.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make local functions and variable static. Do some rearrangement
of the string table stuff to put it where it gets used.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The filter engine will time-out and ignore filters beyond
200-something hops. We also need to avoid infinite loops in
efx_filter_search() when the table is full.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Change "return (EXPR);" to "return EXPR;"
return is not a function, parentheses are not required.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This board never went into production, but some engineering samples
are in use.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
SFN4111T never reached production and is not being used for internal
or customer testing.
Since we have no production Falcon boards using the SFT9001 or the
GMAC, remove support for them as well.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/sfc/filter.c: In function ‘efx_probe_filters’:
drivers/net/sfc/filter.c:422: error: implicit declaration of function ‘vmalloc’
drivers/net/sfc/filter.c:422: warning: assignment makes pointer from integer without a cast
drivers/net/sfc/filter.c: In function ‘efx_remove_filters’:
drivers/net/sfc/filter.c:442: error: implicit declaration of function ‘vfree’
Signed-off-by: David S. Miller <davem@davemloft.net>
For backward compatibility, add it at the end.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This requires some reorganisation of channel setup and teardown to
ensure that we can always roll-back a failed change.
Based on work by Steve Hodgson <shodgson@solarflare.com>
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller