if_stats(9): Add ifp argument to if_stat..._ref.

This will enable us to pass the ifp through to a dtrace probe inside.

No functional change intended in this change, but this is an API
change visible to modules so it shouldn't be pulled up.

PR kern/58377

Remove unnecessary include of <sys/malloc.h>.

Pass proper status values to rnd_add_uint32(9) as rnd(9) man page claims.

sn(4): Add rnd(9) support.

branches: 1.46.4;
Don't bother with IFF_OACTIVE.

Adopt <net/if_stats.h>.

branches: 1.44.4;
Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Remove unnecessary include of <sys/malloc.h>.

Pass proper status values to rnd_add_uint32(9) as rnd(9) man page claims.

sn(4): Add rnd(9) support.

branches: 1.46.4;
Don't bother with IFF_OACTIVE.

Adopt <net/if_stats.h>.

branches: 1.44.4;
Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Pass proper status values to rnd_add_uint32(9) as rnd(9) man page claims.

sn(4): Add rnd(9) support.

branches: 1.46.4;
Don't bother with IFF_OACTIVE.

Adopt <net/if_stats.h>.

branches: 1.44.4;
Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

sn(4): Add rnd(9) support.

Don't bother with IFF_OACTIVE.

Adopt <net/if_stats.h>.

branches: 1.44.4;
Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Don't bother with IFF_OACTIVE.

Adopt <net/if_stats.h>.

branches: 1.44.4;
Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Adopt <net/if_stats.h>.

Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

branches: 1.42.2;
Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Use ETHER_LOCK()/ETHER_UNLOCK() for all ethernet drivers to protect ec_multi*.

-No functional change:
- KNF
- u_int*_t -> uint*_t.

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

-No functional change:
- KNF
- u_int*_t -> uint*_t.

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.

Invert logic around nested pmf(9) registrations for readability.

Also call pmf_class_network_register(9).

Replace shutdownhook_establish(9) with pmf_device_register1(9).

Fix typo in comment.

branches: 1.26.2; 1.26.6;
Remove clause 3 and 4 from TNF licenses

branches: 1.25.2;
Split softc/device_t and misc cleanup for sn(4).

The DP83932C manual says the CAM enable register (CER) can't be
accessed on normal operations and the CER should be set up
through the last entry in the CAM desciptor area and loaded
via LCAM command, so make our driver do so, though the previoius
code (writing CER directly) worked without problems.

Tested on sn at jazzio on arc (in 32bit mode) by me and
sn at nubus on mac68k (in 16bit mode) by Paul Ripke on port-mac68k.

branches: 1.23.2;
use aprint_*_dev and device_xname

Enable ETHERCAP_VLAN_MTU.

sonic_stop: clear IFF_RUNNING before disabling.

branches: 1.20.2; 1.20.6;
There is really no use for switch when there is no case labels
except for the default, so remove the enclosing switch and the
default label.

branches: 1.19.2; 1.19.8;
machine/{bus,cpu,intr}.h -> sys/{bus,cpu,intr}.h

branches: 1.18.2; 1.18.6;
Constify: LLADDR -> CLLADDR. I'm aiming here to make it easier to
identify sockaddr_dl abuse that remains in the kernel, especially
the potential for overwriting memory past the end of a sockaddr_dl
with, e.g., memcpy(LLADDR(), ...).

branches: 1.17.2; 1.17.6;
Set DCR_TFT[01] and DCR_RFT[01] bits of DCR register for TX/RX thresholds
in each MD attachment since optimized values could be machine dependent.

In sonic_reset(), make sure to stop TX, RX and timer
and clear and disable all interrupts.
Required by mac68k obio sonic cards, and
no bad side effect on arc jazzio sonic.

Sync tda_status and rda_status DMA descriptors also after they are polled
in interrupt handlers for systems which don't have BUS_DMA_COHERENT support.

branches: 1.14.2; 1.14.4;
Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

branches: 1.13.26;
merge ktrace-lwp.

branches: 1.12.4;
nuke trailing whitespace

Eliminate use of M_HASFCS.

branches: 1.10.4; 1.10.6;
When adding/deleting multicast addresses, only whack the address
filter if the interface is marked RUNNING.

Fixes kern/27678.

branches: 1.9.4;
Fix bogus GCC uninitialized variable warning.

branches: 1.8.2;
When the extra pad buffer is used, the number of TX segments
should be incremented than dm_nsegs.

Fix pasto and typos.

Use a properly zero'd buffer to pad the packet to ETHER_MIN_LEN-ETHER_CRC_LEN

branches: 1.5.10;
add/cleanup RCSID

branches: 1.4.2;
Make sure to initialize the all Rx descriptors properly in sonic_init()
even if mbuf for them are already allocated.
This fixes "receive descriptor exhausted" errors.

Use BUS_DMA_READ and BUS_DMA_WRITE in some obvious places.

branches: 1.2.2;
Do a little manual CSE, taking unneeded comparisons out of loops,
and shrinking the object code somewhat. On an R4400:

Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o

Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o

A new DP83932 ``SONIC'' driver, which uses bus_dma(9) and does I/O
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

branches: 1.41.2;
Plug mbuf leak on MCLGET failure in sonic_rxintr.

From Ilja Van Sprundel.

branches: 1.40.2;
Apply deferred if_start to more drivers

And annotate some XXX_start as it runs in softint to clarify that
it doesn't need deferred if_start.

Move bpf_mtap and if_ipackets++ on Rx of each driver to percpuq if_input

The benefits of the change are:
- We can reduce codes
- We can provide the same behavior between drivers
- Where/When if_ipackets is counted up
- Note that some drivers still update packet statistics in their own
way (periodical update)
- Moved bpf_mtap run in softint
- This makes it easy to MP-ify bpf

Proposed on tech-kern and tech-net

branches: 1.38.2;
Introduce m_set_rcvif and m_reset_rcvif

The API is used to set (or reset) a received interface of a mbuf.
They are counterpart of m_get_rcvif, which will come in another
commit, hide internal of rcvif operation, and reduce the diff of
the upcoming change.

No functional change.

Introduce softint-based if_input

This change intends to run the whole network stack in softint context
(or normal LWP), not hardware interrupt context. Note that the work is
still incomplete by this change; to that end, we also have to softint-ify
if_link_state_change (and bpf) which can still run in hardware interrupt.

This change softint-ifies at ifp->if_input that is called from
each device driver (and ieee80211_input) to ensure Layer 2 runs
in softint (e.g., ether_input and bridge_input). To this end,
we provide a framework (called percpuq) that utlizes softint(9)
and percpu ifqueues. With this patch, rxintr of most drivers just
queues received packets and schedules a softint, and the softint
dequeues packets and does rest packet processing.

To minimize changes to each driver, percpuq is allocated in struct
ifnet for now and that is initialized by default (in if_attach).
We probably have to move percpuq to softc of each driver, but it's
future work. At this point, only wm(4) has percpuq in its softc
as a reference implementation.

Additional information including performance numbers can be found
in the thread at tech-kern@ and tech-net@:
http://mail-index.netbsd.org/tech-kern/2016/01/14/msg019997.html

Acknowledgment: riastradh@ greatly helped this work.
Thank you very much!

branches: 1.36.4; 1.36.6; 1.36.8; 1.36.12;
Remove unused stuff

branches: 1.35.8; 1.35.14; 1.35.18; 1.35.20; 1.35.22; 1.35.28;
Don't pull in the whole uvm(9) API to access only PAGE_SIZE and
some other constants. These are provided by sys/param.h now.

Push the bpf_ops usage back into bpf.h. Push the common ifp->if_bpf
check into the inline functions as well the fourth argument for
bpf_attach.

branches: 1.33.2; 1.33.4;
Redefine bpf linkage through an always present op vector, i.e.
#if NBPFILTER is no longer required in the client. This change
doesn't yet add support for loading bpf as a module, since drivers
can register before bpf is attached. However, callers of bpf can
now be modularized.

Dynamically loadable bpf could probably be done fairly easily with
coordination from the stub driver and the real driver by registering
attachments in the stub before the real driver is loaded and doing
a handoff. ... and I'm not going to ponder the depths of unload
here.

Tested with i386/MONOLITHIC, modified MONOLITHIC without bpf and rump.

Use a proper local variable.

Make local functions static.