Under heavy load, there is an compatibility issue regarding PCIe write
credits with certain chipsets.  It can be mitigated by limiting read
requests to 256 Bytes.

This workaround is always enabled for Tbird2 on Gladius.  We also add
a module parameter to enable workaround for non-Gladius cards.
Signed-off-by: NChien Tung <chien.tin.tung@intel.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Change management of perfect filter table to allow enhanced
performance applications.
Signed-off-by: NVadim Makhervaks <vmakhervaks@neteffect.com>
Signed-off-by: NSweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: NChien Tung <ctung@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Mask off a critical error after 100 critical error interrupts to
keep the system "sane".
Signed-off-by: NSweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: NChien Tung <ctung@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Add a module parameter wqm_quanta.  It controls the number of segments
transmitted at a time.
Signed-off-by: NSweta Bhatt <sweta.bhatt@einfochips.com>
Signed-off-by: NChien Tung <ctung@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Add support for NetEffect 4 port 1G HP blade card.  The mapping
between physical port and MAC is different from the standup card.
Signed-off-by: NChien Tung <ctung@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Every caller of nes_post_cqp_request() passed it NES_CQP_REQUEST_RING_DOORBELL,
so just remove that parameter and always ring the doorbell.
Signed-off-by: NRoland Dreier <rolandd@cisco.com>
Acked-by: NFaisal Latif <flatif@neteffect.com>

Various cleanups:
	- Change // to /* .. */
	- Place whitespace around binary operators.
	- Trim down a few long lines.
	- Some minor alignment formatting for better readability.
	- Remove some silly tabs.
Signed-off-by: NGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

This patch enables the iw_nes module for NetEffect RNICs to support
additional PHYs including SFP+ (referred to as ARGUS in the code).
Signed-off-by: NEric Schneider <eric.schneider@neteffect.com>
Signed-off-by: NGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Signed-off-by: Faisal Latif <flatif@neteffect.com.
Signed-off-by: NGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Remove the volatile qualifier from the cq_vbase member of struct
nes_hw_cq, and add an rmb() in the one place where it looks like
access order might make a difference.  As usual, removing a volatile
qualifier in a declaration is actually a bug fix, since a volatile
qualifier is not sufficient to make sure that aggressively
out-of-order CPUs don't reorder things and cause incorrect results.

For example, a CPU might speculatively execute reads of other cqe
fields before the NIC hardware has written those fields and before it
has set the NES_CQE_VALID bit (even though those reads come after the
test of the NES_CQE_VALID bit in program order), but then when the CPU
actually executes the conditional test of the NES_CQE_VALID, the bit
has been set, and the CPU will proceed with the results of the earlier
speculative execution and end up using bogus data.

This also gets rid of the warning:

    drivers/infiniband/hw/nes/nes_verbs.c: In function 'nes_destroy_cq':
    drivers/infiniband/hw/nes/nes_verbs.c:1978: warning: passing argument 3 of 'pci_free_consistent' discards qualifiers from pointer target type
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Interrupt moderation low threshold value was incorrectly triggering,
indicating that the threshold should be lowered.

The impact was the timer was likely to become 40usecs and get stuck
there.  The biggest side effect was too many interrupts and nonoptimal
performance.
Signed-off-by: NJohn Lacombe <jlacombe@neteffect.com>
Signed-off-by: NGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>

Add a standard NIC and RDMA/iWARP driver for NetEffect 1/10Gb ethernet adapters.
Signed-off-by: NGlenn Streiff <gstreiff@neteffect.com>
Signed-off-by: NRoland Dreier <rolandd@cisco.com>