Add a few stat counters for tso and lro.
MFC after: 3 days
Sponsored by: Microsoft
(cherry picked from commit b167e449c8db01f082691503fb5c1255ad5750eb)
With this support, users can enable or disable offloading features
such as txcsum, rxcsum, tso and software lro through ifconfig.
To enable or disable tx features, do it on mana interface first,
then hn/netvsc to sync it up with mana. For example:
ifconfig mana0 -txcsum
ifconfig hn0 -tscsum
To enable or disable rx features, just applying on mana interface
would be sufficient.
Disabling txcsum imples disabling tso. Enabling tso when txcsum
is disabled will result in an error message in dmesg requesting
to enable txcsum first.
Above applies to ipv6 offloading features as well.
Tested by: whu
MFC after: 3 days
Sponsored by: Microsoft
(cherry picked from commit ab7dc1ceb6d36fd804bedb818086ae3ff6692bf7)
The parameters for tso on mana were not set correctly. Also the
hwassist bits were not set. These two cause tso on mana not work.
Fixed the issues and make tso working on mana.
Tested by: whu
MFC after: 3 days
Sponsored by: Microsoft
(cherry picked from commit 643fd7b4bc57de87ddfeb75a8f0bdb27dbb8c3ce)
It's inefficient to ring the doorbell page every time a WQE is posted to
the received queue. Excessive MMIO writes result in CPU spending more
time waiting on LOCK instructions (atomic operations), resulting in
poor scaling performance.
Move the code for ringing doorbell page to where after we have posted all
WQEs to the receive queue in mana_poll_rx_cq().
In addition, use the correct WQE count for ringing RQ doorbell.
The hardware specification specifies that WQE_COUNT should set to 0 for
the Receive Queue. Although currently the hardware doesn't enforce the
check, in the future releases it may check on this value.
Tested by: whu
MFC after: 1 week
Sponsored by: Microsoft
(cherry picked from commit e4e11c1d07f5d58ff8cf4e07ac8f61eecbbb5417)
The panic stack looks like this:
panic: _sx_xlock_hard: recursed on non-recursive sx MANA port lock
@ /usr/src/sys/dev/mana/mana_en.c:1022
KDB: stack backtrace:
vpanic() at vpanic+0x150/frame 0xfffffe011b3c1970
panic() at panic+0x43/frame 0xfffffe011b3c19d0
_sx_xlock_hard() at _sx_xlock_hard+0x82d/frame 0xfffffe011b3c1a70
_sx_xlock() at _sx_xlock+0xb0/frame 0xfffffe011b3c1ab0
mana_cfg_vport() at mana_cfg_vport+0x79/frame 0xfffffe011b3c1b40
mana_alloc_queues() at mana_alloc_queues+0x3b/frame 0xfffffe011b3c1c50
mana_up() at mana_up+0x40/frame 0xfffffe011b3c1c70
mana_ioctl() at mana_ioctl+0x25b/frame 0xfffffe011b3c1cb0
ifhwioctl() at ifhwioctl+0xd11/frame 0xfffffe011b3c1db0
hn_xpnt_vf_init() at hn_xpnt_vf_init+0x15f/frame 0xfffffe011b3c1e10
The lock has already been held in the caller. Remove this
redundant lock attempt.
Reported by: NetApp
Sponsored by: Microsoft
- Record the physical address for doorbell page region
For supporting RDMA device with multiple user contexts with their
individual doorbell pages, record the start address of doorbell page
region for use by the RDMA driver to allocate user context doorbell IDs.
- Handle vport sharing between devices
For outgoing packets, the PF requires the VF to configure the vport with
corresponding protection domain and doorbell ID for the kernel or user
context. The vport can't be shared between different contexts.
Implement the logic to exclusively take over the vport by either the
Ethernet device or RDMA device.
- Add functions for allocating doorbell page from GDMA
The RDMA device needs to allocate doorbell pages for each user context.
Implement those functions and expose them for use by the RDMA driver.
- Export Work Queue functions for use by RDMA driver
RDMA device may need to create Ethernet device queues for use by Queue
Pair type RAW. This allows a user-mode context accesses Ethernet hardware
queues. Export the supporting functions for use by the RDMA driver.
- Define max values for SGL entries
The number of maximum SGl entries should be computed from the maximum
WQE size for the intended queue type and the corresponding OOB data
size. This guarantees the hardware queue can successfully queue requests
up to the queue depth exposed to the upper layer.
- Define and process GDMA response code GDMA_STATUS_MORE_ENTRIES
When doing memory registration, the PF may respond with
GDMA_STATUS_MORE_ENTRIES to indicate a follow request is needed. This is
not an error and should be processed as expected.
- Define data structures for protection domain and memory registration
The MANA hardware support protection domain and memory registration for use
in RDMA environment. Add those definitions and expose them for use by the
RDMA driver.
MFC after: 2 weeks
Sponsored by: Microsoft
The proper way to drop this kind of CQE is advancing rxq tail
without indicating the packet to the upper network layer.
MFC after: 2 weeks
Sponsored by: Microsoft
RX fencing allows the driver to know that any prior change to the RQs has
finished, e.g. when the RQs are disabled/enabled or the hashkey/indirection
table are changed, RX fencing is required.
Remove the previous 'sleep' workaround and add the real support for
RX fencing as the PF driver supports the MANA_FENCE_RQ request now (any
old PF driver not supporting the request won't be used in production).
MFC after: 2 weeks
Sponsored by: Microsoft
- In mana_create_txq(), if test fails we must free some resources
as in all the other handling paths of this function.
- In mana_gd_read_cqe(), add warning log in case of CQE read
overflow, instead of failing silently.
- Fix error handling in mana_create_rxq() when
cq->gdma_id >= gc->max_num_cqs.
- In mana_init_port(), use the correct port index rather than 0.
- In mana_hwc_create_wq(), If allocating the DMA buffer fails,
mana_hwc_destroy_wq was called without previously storing the
pointer to the queue. In order to avoid leaking the pointer to
the queue, store it as soon as it is allocated.
MFC after: 2 weeks
Sponsored by: Microsoft
Currently when the HWC creation fails, the error handling is flawed,
e.g. if mana_hwc_create_channel() -> mana_hwc_establish_channel() fails,
the resources acquired in mana_hwc_init_queues() is not released.
Enhance mana_hwc_destroy_channel() to do the proper cleanup work and
call it accordingly.
MFC after: 2 weeks
Sponsored by: Microsoft
-Each CQ start task queue to poll when completion happens.
This means every rx and tx queue has its own cleanup task
thread to poll the completion.
- Arm EQ everytime no matter it is mana or hwc. CQ arming
depends on the budget.
- Fix a warning in mana_poll_tx_cq() when cqe_read is 0.
- Move cqe_poll from EQ to CQ struct.
- Support EQ sharing up to 8 vPorts.
- Ease linkdown message from mana_info to mana_dbg.
Tested by: whu
MFC after: 2 weeks
Sponsored by: Microsoft
MANA is the new network adapter from Microsoft which will be available
in Azure public cloud. It provides SRIOV NIC as virtual function to
guest OS running on Hyper-V.
The code can be divided into two major parts. Gdma_main.c is the one to
bring up the hardware board and drives all underlying hardware queue
infrastructure. Mana_en.c contains all main ethernet driver code.
It has only tested and supported on amd64 architecture.
PR: 256336
Reviewed by: decui@microsoft.com
Tested by: whu
MFC after: 2 week
Relnotes: yes
Sponsored by: Microsoft
Differential Revision: https://reviews.freebsd.org/D31150
