The MLX5 driver has four different types of DMA allocations which are
now allocated using busdma:
1) The 4K firmware DMA-able blocks. One busdma object per 4K allocation.
2) Data for firmware commands use the 4K firmware blocks split into four 1K blocks.
3) The 4K firmware blocks are also used for doorbell pages.
4) The RQ-, SQ- and CQ- DMA rings. One busdma object per allocation.
After this patch the mlx5en driver can be used with DMAR enabled in
the FreeBSD kernel.
MFC after: 1 week
Sponsored by: Mellanox Technologies
- When device disappears from PCI indicate error device state and:
1) Trigger command completion for all pending commands
2) Prevent new commands from executing and return:
- success for modify and remove/cleanup commands
- failure for create/query commands
3) When reclaiming pages for a device in error state don't ask FW to
return all given pages, just release the allocated memory
MFC after: 1 week
Sponsored by: Mellanox Technologies
PCI device(s), changes:
- alloc_entry() now clears bit for page slot entry aswell
- update of cmd->ent_arr[] is now under cmd->alloc_lock
- complete command if alloc_entry() fails
MFC after: 1 week
Sponsored by: Mellanox Technologies
By default reading the diagnostic counters is disabled. The firmware
decides which counters are supported and only those supported show up
in the dev.mce.X.diagnostics sysctl tree.
To enable reading of diagnostic counters set one or more of the
following sysctls to one:
dev.mce.X.conf.diag_general_enable=1
dev.mce.X.conf.diag_pci_enable=1
MFC after: 1 week
Sponsored by: Mellanox Technologies
consistent return values from the mlx5e_sq_has_room_for()
function. The two counters are incremented by different threads under
different locks.
MFC after: 1 week
Sponsored by: Mellanox Technologies
- Add new sysctl node to control the transmit packet bufring.
- Add optimised version of the transmit routine which output packets
directly to the DMA ring instead of using bufring in case the transmit
lock is congested. This can reduce the number of taskswitches which in
turn influence the overall system CPU usage, depending on the
workload.
- Add " TX" suffix to debug name for transmit mutexes to silence some
witness warnings about aquiring duplicate locks having same name.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Suggested by: gallatin @
Add own state variable to track if a sendqueue is stopped or not.
This will prevent traffic from entering the sendqueue while it is
being destroyed.
Update drain function to wait for traffic to be transmitted before
returning when the link state is active.
Add extra checks in transmit path for stopped SQ's.
While at it:
- Use likely() for a mbuf pointer check.
- Remove redundant IFF_DRV_RUNNING check.
MFC after: 1 week
Sponsored by: Mellanox Technologies
The firmware/hardware does not generate additional completion
events unless we post new buffers. Use a timer to try to post
more buffers in case we are temporarily out of mbufs. Else
the receive schedule completely stops.
Sponsored by: Mellanox Technologies
MFC after: 1 week
When mlx5e_sq_xmit() returns an error code and the mbuf pointer is set,
we should not free the mbuf, because the caller will keep the mbuf in
the drbr. Make sure the mbuf pointer is correctly set upon function
exit.
Sponsored by: Mellanox Technologies
MFC after: 1 week
The hardware MTU size can't be set to a value less than 1500 bytes due
to side-band management support. Allow setting the software MTU size
below 1500 bytes, thus creating a mismatch between hardware and
software MTU sizes.
Sponsored by: Mellanox Technologies
MFC after: 1 week
Try to reuse code to setup sendqueues when possible by making some static
functions global. Further split the mlx5e_close_sq_wait() function to
separate out reusable parts.
Sponsored by: Mellanox Technologies
MFC after: 1 week
This change also reduces the size of the mlx5e_sq structure so that the last
queue_state element will fit into the previous cacheline and then the mlx5e_sq
structure becomes one cacheline less for amd64.
Sponsored by: Mellanox Technologies
MFC after: 1 week
Make some functions and structures global to allow for code reuse
when creating rate limiting sendqueues.
Sponsored by: Mellanox Technologies
MFC after: 1 week
Move setting of CQ moderation mode together with the other
CQ moderation parameters. Pass completion event vector as
a separate argument to mlx5e_open_cq(), because its value is
different for each call. Pass mlx5e_priv pointer instead of
mlx5e_channel pointer so that code can be used by rate
limiting sendqueues.
Sponsored by: Mellanox Technologies
MFC after: 1 week
This change allows for reusing the transmit path for so called
rate limited senqueues. While at it optimise some pointer lookups
in the fast path.
Sponsored by: Mellanox Technologies
MFC after: 1 week
- Add new firmware commands and update existing ones.
- Add more firmware related structures and update existing ones.
- Some minor fixes, like adding missing \n to some prints.
Sponsored by: Mellanox Technologies
MFC after: 1 week
Clear the device description to avoid use after free because the
bsddev is not destroyed when the mlx5en module is unloaded. Only when
the parent mlx5 module is unloaded the bsddev is destroyed. This fixes
a panic on listing sysctls which refer strings in the bsddev after the
mlx5en module has been unloaded.
Sponsored by: Mellanox Technologies
MFC after: 1 week
driver. This change significantly increases the overall RX aggregation
ratio for heavily loaded networks handling 10-80 thousand simultaneous
connections.
Remove the turbo LRO code and all references to it which has now been
superceeded by the tcp_lro_queue_mbuf() function.
Tested by: Netflix
Sponsored by: Mellanox Technologies
MFC after: 1 week
This patch adds the missing pieces needed for device setup using the
mlx5en driver inside a virtual machine which is providing hardware
access through SR-IOV.
Sponsored by: Mellanox Technologies
MFC after: 1 week
tunable SYSCTL's. Linux module parameters are associated with the
module they belong to. FreeBSD does not share this concept of a parent
module. Instead add macros which define the prefix to use for the
module parameters in the LinuxKPI consumers.
While at it convert all "bool" LinuxKPI module parameters to "byte"
type, because we don't have a "bool" type of SYSCTL in FreeBSD.
Sponsored by: Mellanox Technologies
MFC after: 1 week
Store the last doorbell write in the mlx5e_sq structure and write the
doorbell to the hardware when the transmit routine finishes
transmitting all queued mbufs.
Sponsored by: Mellanox Technologies
Tested by: Netflix
MFC after: 1 week
This patch implements a sysctl which allows setting a factor, N, for
how many work queue elements can be generated before requiring a
completion event. When a completion event happens the code simulates N
completion events instead of only one. When draining a transmit queue,
N-1 NOPs are transmitted at most, to force generation of the final
completion event. Further a timer is running every HZ ticks to flush
any remaining data off the transmit queue when the tx_completion_fact
> 1.
The goal of this feature is to reduce the PCI bandwidth needed when
transmitting data.
Sponsored by: Mellanox Technologies
Tested by: Netflix
MFC after: 1 week
function to error out early when no port module is present and doing
eeprom access. This also prevents error codes from filling up in
dmesg.
Sponsored by: Mellanox Technologies
Tested by: Netflix
MFC after: 1 week
And factor out tcp_lro_rx_done, which deduplicates the same logic with
netinet/tcp_lro.c
Reviewed by: gallatin (1st version), hps, zbb, np, Dexuan Cui <decui microsoft com>
Sponsored by: Microsoft OSTC
Differential Revision: https://reviews.freebsd.org/D5725
