Commit graph

29 commits

Author SHA1 Message Date
David van Moolenbroek
9d89e72a5c ahci: more robustness against flaky devices
- if supported, override BSY/DRQ flags and start the port anyway if it
  times out with DET=3h status during device detection;
- no longer rely on the device signature to be set; unless a valid
  signature is obtained, try both ATA and ATAPI device identification.
2013-02-13 14:29:44 +00:00
David van Moolenbroek
eb89b33d39 ahci: device detection rewrite
- do not start a port before the BSY and DRQ flags have been cleared;
  as such, poll on device status rather than signature availability.
- change "ahci_sig_timeout" to "ahci_device_timeout" variable setting
  accordingly; this variable determines the polling duration before a
  newly attached device is given up on, and uses 30 seconds as default;
- use port connect changes (PCS/X/DET->1h) to kick off polling for an
  attached device; detachment is still detected by means of PhyRdy
  status changes (PRCS/N/DET<->3h).
2013-02-13 14:26:48 +00:00
David van Moolenbroek
23b12e29a2 ahci: rewrite timeout initialization code
- the "ahci_sig_timeout" variable now denotes the entire checking
  period, and the delay between checks has been hardcoded; what was
  previously "ahci_sig_checks" is now computed from those two;
- timeout values are no longer used for both millisecond and clock
  tick values, and better typed;
- the computation of timeouts is no longer off by half a second.
2013-02-12 13:53:09 +00:00
David van Moolenbroek
ad0b58fe83 ahci: centralize, fix port reset 2013-02-12 13:52:52 +00:00
David van Moolenbroek
f2de719cfe ahci: link FIS receive mode to memory allocation
There is no need to set/clear PxCMD.FRE on every port start/stop.

Also remove some already useless and now also incomplete port
reinitialization at startup.
2013-02-12 13:52:33 +00:00
David van Moolenbroek
3c55fcbc13 ahci: use macros to access HBA and port registers 2013-02-12 13:52:01 +00:00
David van Moolenbroek
7dd6189cc7 drivers: fix various sys_irqsetpolicy calls 2012-10-24 11:29:10 +00:00
David van Moolenbroek
d75ef5a05c ahci: resolve Coverity warnings 2012-07-30 12:10:08 +00:00
Ben Gras
2bfeeed885 drop segment from safecopy invocations
. all invocations were S or D, so can safely be dropped
	  to prepare for the segmentless world
	. still assign D to the SCP_SEG field in the message
	  to make previous kernels usable
2012-06-16 16:22:51 +00:00
Ben Gras
7336a67dfe retire PUBLIC, PRIVATE and FORWARD 2012-03-25 21:58:14 +02:00
David van Moolenbroek
186a4db672 ahci: use sys_vumap() instead of sys_umap()
This is only an optimization for CPU performance. Callers are
currently still required to supply contiguous memory.
2012-03-24 19:51:13 +01:00
David van Moolenbroek
e8d2d2f6b6 libminc-related updates
- add files needed for acpi, ahci, fbd, vfs to libminc
- remove "-lc" from their respective makefiles
- remove setenv from libminc (requires initialization)
2012-03-12 23:16:45 +01:00
David van Moolenbroek
5152cfd8bd drivers: remove redundant PCI ID tables
- remove PCI tables where system.conf suffices
- remove drivers' ability to mess up NIC order
- fix dp8390 PCI enumeration
- convert ti1225 to instance model
- add system.conf entry for ti1225
2012-03-07 23:58:00 +01:00
Ben Gras
2fe8fb192f Full switch to clang/ELF. Drop ack. Simplify.
There is important information about booting non-ack images in
docs/UPDATING. ack/aout-format images can't be built any more, and
booting clang/ELF-format ones is a little different. Updating to the
new boot monitor is recommended.

Changes in this commit:

	. drop boot monitor -> allowing dropping ack support
	. facility to copy ELF boot files to /boot so that old boot monitor
	  can still boot fairly easily, see UPDATING
	. no more ack-format libraries -> single-case libraries
	. some cleanup of OBJECT_FMT, COMPILER_TYPE, etc cases
	. drop several ack toolchain commands, but not all support
	  commands (e.g. aal is gone but acksize is not yet).
	. a few libc files moved to netbsd libc dir
	. new /bin/date as minix date used code in libc/
	. test compile fix
	. harmonize includes
	. /usr/lib is no longer special: without ack, /usr/lib plays no
	  kind of special bootstrapping role any more and bootstrapping
	  is done exclusively through packages, so releases depend even
	  less on the state of the machine making them now.
	. rename nbsd_lib* to lib*
	. reduce mtree
2012-02-14 14:52:02 +01:00
Raja Appuswamy
8ab7667da4 ahci: NCQ support 2011-12-12 14:13:05 +01:00
David van Moolenbroek
4005bba437 libblockdriver: clear IPC only on stateful restart
This removes a race condition when the block driver performs a
complete restart after a crash (the new default). If any user of
the driver finds out its new endpoint and sends a request to the
new driver instance before this instance has had the chance to
initialize, then its initialization would clear all IPC state and
thereby erroneously cancel the incoming request. Clearing IPC
state is only desired upon a stateful restart (where the driver's
endpoint is retained). This information is now passed to and used
by libblockdriver accordingly.
2011-12-11 22:36:19 +01:00
David van Moolenbroek
e379e0936e Make block drivers restart with new endpoint 2011-12-05 16:28:08 +01:00
David van Moolenbroek
e2758c6759 libblockdriver: allow for not handling partitions
Each block driver now gets to specify whether it is a disk block
driver, which implies it wants the library to handle getting and
setting partitions for it.
2011-11-28 16:42:35 +01:00
David van Moolenbroek
9874865a6f ahci: FUA (force-write) support 2011-11-23 15:40:38 +01:00
David van Moolenbroek
b4d909d415 Split block/character protocols and libdriver
This patch separates the character and block driver communication
protocols. The old character protocol remains the same, but a new
block protocol is introduced. The libdriver library is replaced by
two new libraries: libchardriver and libblockdriver. Their exposed
API, and drivers that use them, have been updated accordingly.
Together, libbdev and libblockdriver now completely abstract away
the message format used by the block protocol. As the memory driver
is both a character and a block device driver, it now implements its
own message loop.

The most important semantic change made to the block protocol is that
it is no longer possible to return both partial results and an error
for a single transfer. This simplifies the interaction between the
caller and the driver, as the I/O vector no longer needs to be copied
back. Also, drivers are now no longer supposed to decide based on the
layout of the I/O vector when a transfer should be cut short. Put
simply, transfers are now supposed to either succeed completely, or
result in an error.

After this patch, the state of the various pieces is as follows:
- block protocol: stable
- libbdev API: stable for synchronous communication
- libblockdriver API: needs slight revision (the drvlib/partition API
  in particular; the threading API will also change shortly)
- character protocol: needs cleanup
- libchardriver API: needs cleanup accordingly
- driver restarts: largely unsupported until endpoint changes are
  reintroduced

As a side effect, this patch eliminates several bugs, hacks, and gcc
-Wall and -W warnings all over the place. It probably introduces a
few new ones, too.

Update warning: this patch changes the protocol between MFS and disk
drivers, so in order to use old/new images, the MFS from the ramdisk
must be used to mount all file systems.
2011-11-23 14:06:37 +01:00
David van Moolenbroek
47aad344c3 Drivers: fix issues introduced by commit b198207 2011-11-04 23:54:04 +01:00
David van Moolenbroek
5320333614 ahci: prevent compiler memory access misordering
While no problems have been observed in practice yet, modern compilers
may reorder memory access operations, and that could lead to problems
with memory-mapped I/O typically done by drivers. This patch prevents
any potentially problematic reordering by the compiler in the AHCI
driver.
2011-11-04 14:13:24 +01:00
David van Moolenbroek
e1d867b686 ahci/libdriver: multithreading support
This patch adds support for executing multiple concurrent requests on
different devices on the same AHCI controller. The libdriver library
has been extended to include a generic multithreading interface, and
the AHCI driver has been extended to make use of this interface.

The original version of this code has been written by Arne Welzel.
2011-11-04 09:37:53 +00:00
Arun Thomas
b956c8735e Fix GCC image building 2011-07-09 15:04:42 +02:00
Ben Gras
b19820774e fixed clang warnings in drivers/
. changed debug statements system for audio/ to do so
2011-06-09 16:57:51 +02:00
David van Moolenbroek
c51cd5fe91 Server/driver protocols: no longer allow third-party copies.
Before safecopies, the IO_ENDPT and DL_ENDPT message fields were needed
to know which actual process to copy data from/to, as that process may
not always be the caller. Now that we have full safecopy support, these
fields have become useless for that purpose: the owner of the grant is
*always* the caller. Allowing the caller to supply another endpoint is
in fact dangerous, because the callee may then end up using a grant
from a third party. One could call this a variant of the confused
deputy problem.

From now on, safecopy calls should always use the caller's endpoint as
grant owner. This fully obsoletes the DL_ENDPT field in the
inet/ethernet protocol. IO_ENDPT has other uses besides identifying the
grant owner though. This patch renames IO_ENDPT to USER_ENDPT, not only
because that is a more fitting name (it should never be used for I/O
after all), but also in order to intentionally break any old system
source code outside the base system. If this patch breaks your code,
fixing it is fairly simple:

- DL_ENDPT should be replaced with m_source;
- IO_ENDPT should be replaced with m_source when used for safecopies;
- IO_ENDPT should be replaced with USER_ENDPT for any other use, e.g.
  when setting REP_ENDPT, matching requests in CANCEL calls, getting
  DEV_SELECT flags, and retrieving of the real user process's endpoint
  in DEV_OPEN.

The changes in this patch are binary backward compatible.
2011-04-11 17:35:05 +00:00
David van Moolenbroek
484b2f43d6 at_wini/ahci: write cache ioctls 2010-08-12 14:09:34 +00:00
David van Moolenbroek
5998a4b2af AHCI driver: miscellaneous changes
- check the DF status flag after each command
- increase I/O timeout from 15 to 30 seconds
- share some code between ATA and ATAPI after all
- produce more accurate errors on DIOCEJECT
- rename AHCI_ID_SIZE to the more appropriate ATA_ID_SIZE
- rearrange ahci.h in a now more sensible way
2010-08-12 14:08:23 +00:00
David van Moolenbroek
16f2eb25f4 AHCI driver 2010-08-05 16:37:58 +00:00