Commit Graph

11 Commits

Author SHA1 Message Date
Ben Hutchings 9f2cb71c2b sfc: Leave interrupts and event queues enabled whenever we can
When SR-IOV is enabled we may receive FLR (Function-Level Reset)
events, associated queue flush events and requests from VF drivers at
any time.  Therefore we need to keep event queues and interrupts
enabled whenever possible.

Currently we stop interrupt-driven event processing before flushing RX
and TX queues; efx_nic_flush_queues() then polls event queues for
flush events and discards any others it finds.  Change it to work with
the regular event handling functions.

Currently efx_start_channel() fills RX queues synchronously when a
device is brought up.  This could now race with NAPI, so change it to
send fill events.

This was almost entirely written by Steve Hodgson, formerly
shodgson@solarflare.com.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-16 00:24:46 +00:00
Ben Hutchings 2ae75dac30 sfc: Generate RX fill events based on RX queues, not channels
This makes it harder to accidentally send such events to TX-only
channels.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-16 00:15:03 +00:00
Ben Hutchings 4ef594eb89 sfc: Generalise driver event generation
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-16 00:14:59 +00:00
Ben Hutchings 5b6262d0cc sfc: Replace some literal constants with EFX_PAGE_SIZE/EFX_BUF_SIZE
The 'page size' for PCIe DMA, i.e. the alignment of boundaries at
which DMA must be broken, is 4KB.  Name this value as EFX_PAGE_SIZE
and use it in efx_max_tx_len().  Redefine EFX_BUF_SIZE as
EFX_PAGE_SIZE since its value is also a result of that requirement,
and use it in efx_init_special_buffer().

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-02-13 23:40:49 +00:00
Ben Hutchings db3395697c sfc: Replace efx_rx_buffer::is_page and other booleans with a flags field
Replace checksummed and discard booleans from efx_handle_rx_event()
with a bitmask, added to the flags field.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-27 00:11:00 +00:00
Ben Hutchings 73ba7b68e9 sfc: Remove remnants of on-load self-test
The out-of-tree version of the sfc driver used to run a self-test on
each device before registering it.  Although this was never included
in-tree, some functions have checks for this special case which is not
really possible.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-27 00:10:55 +00:00
Ben Hutchings 1646a6f352 sfc: Clean up test interrupt handling
Interrupts are normally generated by the event queues, moderated by
timers.  However, they may also be triggered by detection of a 'fatal'
error condition (e.g. memory parity error) or by the host writing to
certain CSR fields as part of a self-test.

The IRQ level/index used for these on Falcon rev B0 and Siena is set
by the KER_INT_LEVE_SEL field and cached by the driver in
efx_nic::fatal_irq_level.  Since this value is also relevant to
self-tests rename the field to just 'irq_level'.

Avoid unnecessary cache traffic by using a per-channel 'last_irq_cpu'
field and only writing to the per-controller field when the interrupt
matches efx_nic::irq_level.  Remove the volatile qualifier and use
ACCESS_ONCE in the places we read these fields.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-27 00:10:52 +00:00
Ben Hutchings 5f3f9d6c44 sfc: Consistently test DEBUG macro, not EFX_ENABLE_DEBUG
The netif_dbg() macro is defined in <linux/netdevice.h>.  If the DEBUG
macro is defined, it logs a message at 'debug' level, otherwise it
does nothing.

In net_driver.h we define DEBUG if EFX_ENABLE_DEBUG is defined, but
this is too late for those source files that already got a
definition of netif_dbg() by including <linux/netdevice.h>

Get rid of EFX_ENABLE_DEBUG, and only define and test DEBUG.

In mtd.c, we do not use DEBUG as a condition flag but are forced to
use the DEBUG macro-function from <linux/mtd/mtd.h>.  Undefine DEBUG
before including it.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-27 00:10:48 +00:00
Ben Hutchings 9c636baf85 sfc: Fix some formatting errors reported by checkpatch
Fix the following errors and warnings:

ERROR: trailing whitespace
ERROR: spaces required around that '=' (ctx:VxV)
WARNING: please, no space before tabs

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
2012-01-05 18:44:49 +00:00
David S. Miller 8decf86879 Merge branch 'master' of github.com:davem330/net
Conflicts:
	MAINTAINERS
	drivers/net/Kconfig
	drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
	drivers/net/ethernet/broadcom/tg3.c
	drivers/net/wireless/iwlwifi/iwl-pci.c
	drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c
	drivers/net/wireless/rt2x00/rt2800usb.c
	drivers/net/wireless/wl12xx/main.c
2011-09-22 03:23:13 -04:00
Jeff Kirsher 874aeea5d0 sfc: Move the Solarflare drivers
Moves the Solarflare drivers into drivers/net/ethernet/sfc/ and
make the necessary Kconfig and Makefile changes.

CC: Steve Hodgson <shodgson@solarflare.com>
CC: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2011-08-11 02:33:50 -07:00