Currently there is no good reason to mangle the userland API.
The change was introduced in eac1d566b4,
r279437. Also see https://reviews.freebsd.org/D1881.
I am still convinced that nv should not have introduced intentionally
conflicting API.
Discussed with: rstone
X-MFC with: r279437
Sponsored by: ClusterHQ
rev. 55. The modern CPUs cache and TLB descriptions looked quite
questionable without the update, e.g. Haswell i7 4770S reported:
Data TLB: 4 KB pages, 4-way set associative, 64 entries
L2 cache: 256 kbytes, 8-way associative, 64 bytes/line
After the update, the report is:
Data TLB: 1 GByte pages, 4-way set associative, 4 entries
Data TLB: 4 KB pages, 4-way set associative, 64 entries
Instruction TLB: 2M/4M pages, fully associative, 8 entries
Instruction TLB: 4KByte pages, 8-way set associative, 64 entries
64-Byte prefetching
Shared 2nd-Level TLB: 4 KByte/2MByte pages, 8-way associative, 1024 entries
L2 cache: 256 kbytes, 8-way associative, 64 bytes/line
Some tags were apparently removed from the table 3-21, Vol. 2A. Keep
them around, but add a comment stating the removal.
Update the format line for cpu_stdext_feature according to the bits
from the SDM rev.55. It appears that Haswells do not store %cs and
%ds values in the FPU save area.
Store content of the %ecx register from the CPUID leaf 0x7
subleaf 0 as cpu_stdext_feature2 and print defined bits from it,
again acording to SDM rev. 55.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
before adjusting it to store any registers. This is needed as DTrace may
need to adjust the kernel stack pointer, and previously the new stack
pointer would have needed to be checked incase it was changed.
return -1000 and -10000 to establish a pecking order and we don't want
catch-all or match-all drivers to attach instead of them.
With this change poto(4) can be compiled into the kernel (or preloaded
from the loader), without impact.
(easily) without having to go to other drivers to change the
magical return values. This wouldn't be so bad if there were
proper defines for these constants.
In particular dev/acpica/acpi_pcib_pci.c returns -1000 as the
probe priority and it's expected that this driver gets to
attach over the common PCI bus drivers.
Without creating a LAW entry, any access to the NAND hangs the CPU.
The original intent was to add a quirk to map all of the RouterBoard's LBC
address space in one shot, which would fix it for both NAND and the CF, and
that's probably still in the cards. However, for now, this makes NAND usable
without a separate hack.
Things left before the RouterBoard can run standalone:
* Add partitions to the NAND (not specified by the FDT, which we currently
require).
* Create a YAFFS partition for the kernel. The Mikrotik boot loader requires a
4MB partition at the beginning of NAND, with a file called 'kernel' in the
root.
- MNTK_SUSPENDABLE is set in mnt_kern_flag, not mnt_flag.
- The lower layer of a unionfs mount is read-only, so the mount should
be suspendable iff the upper layer is suspendable.
- Remove a couple of superfluous comments.
Differential Revision: https://reviews.freebsd.org/D2714
Reviewed by: kib, mjg
Create a special resource (= device special file) for management
of tags and maps, as well as for mapping memory into the address
space. DMA resources are managed using the PROTO_IOC_BUSDMA ioctl.
Part 1 implements tag creation, derivation and destruction.
BUS_PROBE_HOOVER is. Drivers like proto(4), when compiled into the
kernel or preloaded, will render your system useless by virtue of
attaching to your PCI busses.
Return BUS_PROBE_GENERIC instead. It's just the next priority up
from BUS_PROBE_HOOVER. No other meaning has been give to its use.
While BUS_PROBE_DEFAULT seems like a better candidate, it's hard
not to think that there must be some reason why these drivers
return -10000 in the first place.
Differential Revision: D2705
code update, with supporting changes in the CORE. Changes for the extended
media types, VF driver has virtual channel protocol changes, and some
register use corrections. This software change should be coordinated with
Firmware updates to your hardware, contact your support channels for that.
MFC after: 1 week
after decoding the instruction matches the one provided by hardware.
Prior to r283293 'vie->num_valid' used to contain the actual length of
the instruction whereas now it contains the maximum instruction length
possible. This introduced a bug when calculating a RIP-relative base address.
Fix this by using 'vie->num_processed' rather than 'vie->num_valid' as the
length of the emulated instruction.
Reported and tested by: tychon
MFC after: 1 week
interpreter list to avoid the problem of holding a non-sleep lock during
a page fault as reported by witness. In addition, it consistently uses
memset()/memcpy() instead of bzero()/bcopy() except in the case where
bcopy() is required (i.e. overlapping copy).
Differential Revision: https://reviews.freebsd.org/D2123
Submitted by: sson
MFC after: 2 weeks
Relnotes: Yes
A hole block pointer can be encountered at any level and the hole
can cover multiple data blocks, but we are reading the data blocks
one by one, so we care only about the current one.
PR: 199804
Reported by: Toomas Soome <tsoome@me.com>
Submitted by: Toomas Soome <tsoome@me.com> (earlier version)
Tested by: Toomas Soome <tsoome@me.com>
MFC after: 11 days
The intel 7260 driver under development requires this - the scans come
in as normal frames but with the frequency provided. The correct method
is to have the driver provide flags (so we can determine if it's 11b
or 11g); this will have to do in the meantime.
Without this, the channel found is 11b, and no ERP (ie "11g") bits
are negotiated with the AP.
This allows the 7260 in 2ghz mode to operate in 11bg, rather than
just 11b.
Tested:
* intel 7260 driver, 11bg channels
logic is now placed in the mmap hook implementation rather than requiring
it to be placed in sys/vm/vm_mmap.c. This hook allows new file types to
support mmap() as well as potentially allowing mmap() for existing file
types that do not currently support any mapping.
The vm_mmap() function is now split up into two functions. A new
vm_mmap_object() function handles the "back half" of vm_mmap() and accepts
a referenced VM object to map rather than a (handle, handle_type) tuple.
vm_mmap() is now reduced to converting a (handle, handle_type) tuple to a
a VM object and then calling vm_mmap_object() to handle the actual mapping.
The vm_mmap() function remains for use by other parts of the kernel
(e.g. device drivers and exec) but now only supports mapping vnodes,
character devices, and anonymous memory.
The mmap() system call invokes vm_mmap_object() directly with a NULL object
for anonymous mappings. For mappings using a file descriptor, the
descriptors fo_mmap() hook is invoked instead. The fo_mmap() hook is
responsible for performing type-specific checks and adjustments to
arguments as well as possibly modifying mapping parameters such as flags
or the object offset. The fo_mmap() hook routines then call
vm_mmap_object() to handle the actual mapping.
The fo_mmap() hook is optional. If it is not set, then fo_mmap() will
fail with ENODEV. A fo_mmap() hook is implemented for regular files,
character devices, and shared memory objects (created via shm_open()).
While here, consistently use the VM_PROT_* constants for the vm_prot_t
type for the 'prot' variable passed to vm_mmap() and vm_mmap_object()
as well as the vm_mmap_vnode() and vm_mmap_cdev() helper routines.
Previously some places were using the mmap()-specific PROT_* constants
instead. While this happens to work because PROT_xx == VM_PROT_xx,
using VM_PROT_* is more correct.
Differential Revision: https://reviews.freebsd.org/D2658
Reviewed by: alc (glanced over), kib
MFC after: 1 month
Sponsored by: Chelsio
with the transmit params.
This allows raw 802.11 frames to be queued in the driver if necessary,
rather than requiring it to be direct-dispatched into the hardware.
Tested:
* ath(4), STA mode
* iwn(4), STA mode
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
802.11 mbufs.
The raw transmit path currently doesn't make it easy to queue
these frames:
* there's no node reference stored in the mbuf, like for the normal
path, and
* the bpf supplied raw transmit parameters (rate, rts/cts, etc)
are passed in as an argument, not as an mbuf tag.
In order to support driver queuing of these frames, we need to
be able to put the above into the mbuf before the driver gets it,
so the driver /can/ put it into a queue if needed.
Use an mbuf tag and for now just verbatim copy the bpf parameters
into it. Later on it may grow to include more options but this
will do for now.
Why would you want to queue raw frames? Well, in the case of
iwn(4), we can't send the firmware frames to transmit before
we hear a beacon - the firmware will consider passive channels
as unavailable until it hears a beacon. The firmware "passive"
channel state is cleared upon each RXON command, which is sent to
update association status. So, when we attempt association and
authorisation, the RXON command causes the firmware to clear out
what it's already seen, and so we have to wait for a beacon before
we can transmit.
Before people get overly excited - this alone doesn't "fix" 5GHz
operation - it just makes it (more) possible.
The aim here is to convert all the drivers over to use a raw_xmit()
API that doesn't include the node and params - instead they'd get
those from the mbuf. Then raw_xmit() becomes just a side-channel
version of the normal transmit path for management traffic.
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
stability.
I'll re-enable it once the scan overhaul is done - the NIC itself
can do bgscan, but not how we're doing it.
MFC after: 2 weeks
Sponsored by: Norse Corp, Inc.
softdep_sync() similarly to the regular vnode sync. Allow retry for
both vnode types.
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
up to 2 rx/tx queues for the 82574.
Program the 82574 to enable 5 msix vectors, assign 1 to each rx queue,
1 to each tx queue and 1 to the link handler.
Inspired by DragonFlyBSD, enable some RSS logic for handling tx queue
handling/processing.
Move multiqueue handler functions so that they line up better in a diff
review to if_igb.c
Always enqueue tx work to be done in em_mq_start, if unable to acquire
the TX lock, then this will be processed in the background later by the
taskqueue. Remove mbuf argument from em_start_mq_locked() as the work
is always enqueued. (stolen from igb)
Setup TARC, TXDCTL and RXDCTL registers for better performance and stability
in multiqueue and singlequeue implementations. Handle Intel errata 3 and
generic multiqueue behavior with the initialization of TARC(0) and TARC(1)
Bind interrupt threads to cpus in order. (stolen from igb)
Add 2 new DDB functions, one to display the queue(s) and their settings and
one to reset the adapter. Primarily used for debugging.
In the multiqueue configuration, bump RXD and TXD ring size to max for the
adapter (4096). Setup an RDTR of 64 and an RADV of 128 in multiqueue configuration
to cut down on the number of interrupts. RADV was arbitrarily set to 2x RDTR
and can be adjusted as needed.
Cleanup the display in top a bit to make it clearer where the taskqueue threads
are running and what they should be doing.
Ensure that both queues are processed by em_local_timer() by writing them both
to the IMS register to generate soft interrupts.
Ensure that an soft interrupt is generated when em_msix_link() is run so that
any races between assertion of the link/status interrupt and a rx/tx interrupt
are handled.
Document existing tuneables: hw.em.eee_setting, hw.em.msix, hw.em.smart_pwr_down, hw.em.sbp
Document use of hw.em.num_queues and the new kernel option EM_MULTIQUEUE
Thanks to Intel for their continued support of FreeBSD.
Reviewed by: erj jfv hiren gnn wblock
Obtained from: Intel Corporation
MFC after: 2 weeks
Relnotes: Yes
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D1994
Previously the OACTIVE flag was being set when the tx descriptors are fully
allocated but it wasn't unset anywhere.
As soon as a packet is transmitted, unset the OACTIVE flag and call start
routine to push any pending packets from the tx queue.
This closes another race where a full tx queue would jam the tx path (tx
queue is full, new packets cannot be added to queue and dwc_txstart never
gets called).
On armv6, cache maintenance can trigger page faults. Add handling so that
these turn into SIGSEGV that kills the process rather than panics that kill
the kernel.
Differential Revision: https://reviews.freebsd.org/D2035
Submitted by: Michal Meloun <meloun@miracle.cz>
Additionally, sort all real filesystems before the virtual ones.
Differential Revision: https://reviews.freebsd.org/D2709
Reviewed by: grehan
MFC after: 5 days
This fatal mismatch appeared to be absolutely harmless, since both structs
have pointer to struct ifnet as their first member, and they both point to
the same ifnet. And the first member is the only one used from the argument.
