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2007-12-26UBI: add ubi_leb_map interfaceArtem Bityutskiy1-0/+1
The idea of this interface belongs to Adrian Hunter. The interface is extremely useful when one has to have a guarantee that an LEB will contain all 0xFFs even in case of an unclean reboot. UBI does have an 'ubi_leb_erase()' call which may do this, but it is stupid and ineffecient, because it flushes whole queue. I should be re-worked to just be a pair of unmap, map calls. The user of the interfaci is UBIFS at the moment. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
2007-11-06[MTD] Provide mtdram.h with mtdram_init_device() prototypeJesper Nilsson1-0/+8
This is used by axisflashmap.c to boot from ram. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Acked-by: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David Woodhouse <dwmw2@infradead.org>
2007-10-27fix breakage in pegasos_ethAl Viro1-0/+3
Fix fallout from commit b45d9147f1582333e180e1023624c003874b7312 ("mv643xx_eth: Remove unused register defines") Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-26Merge branch 'master' of ↵Linus Torvalds2-7/+7
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (32 commits) [NetLabel]: correct usage of RCU locking [TCP]: fix D-SACK cwnd handling [NET] napi: use non-interruptible sleep in napi_disable [SCTP] net/sctp/auth.c: make 3 functions static [TCP]: Add missing I/O AT code to ipv6 side. [SCTP]: #if 0 sctp_update_copy_cksum() [INET]: Unexport icmpmsg_statistics [NET]: Unexport sock_enable_timestamp(). [TCP]: Make tcp_match_skb_to_sack() static. [IRDA]: Make ircomm_tty static. [NET] fs/proc/proc_net.c: make a struct static [NET] dev_change_name: ignore changes to same name [NET]: Document some simple rules for actions [NET_CLS_ACT]: Use skb_act_clone [NET_CLS_ACT]: Introduce skb_act_clone [TCP]: Fix scatterlist handling in MD5 signature support. [IPSEC]: Fix scatterlist handling in skb_icv_walk(). [IPSEC]: Add missing sg_init_table() calls to ESP. [CRYPTO]: Initialize TCRYPT on-stack scatterlist objects correctly. [CRYPTO]: HMAC needs some more scatterlist fixups. ...
2007-10-26De-constify sched.hAlexey Dobriyan1-14/+14
[PATCH] De-constify sched.h This reverts commit a8972ccf00b7184a743eb6cd9bc7f3443357910c ("sched: constify sched.h") 1) Patch doesn't change any code here, so gcc is already smart enough to "feel" constness in such simple functions. 2) There is no such thing as const task_struct. Anyone who think otherwise deserves compiler warning. Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-26[NET] napi: use non-interruptible sleep in napi_disableBenjamin Herrenschmidt1-1/+1
The current napi_disable() uses msleep_interruptible() but doesn't (and can't) exit in case there's a signal, thus ending up doing a hot spin without a cpu_relax. Use uninterruptible sleep instead. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-26Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6David S. Miller1-6/+6
2007-10-25Merge branch 'master' of ↵Linus Torvalds2-2/+4
git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: [IPV4]: Explicitly call fib_get_table() in fib_frontend.c [NET]: Use BUILD_BUG_ON in net/core/flowi.c [NET]: Remove in-code externs for some functions from net/core/dev.c [NET]: Don't declare extern variables in net/core/sysctl_net_core.c [TCP]: Remove unneeded implicit type cast when calling tcp_minshall_update() [NET]: Treat the sign of the result of skb_headroom() consistently [9P]: Fix missing unlock before return in p9_mux_poll_start [PKT_SCHED]: Fix sch_prio.c build with CONFIG_NETDEVICES_MULTIQUEUE [IPV4] ip_gre: sendto/recvfrom NBMA address [SCTP]: Consolidate sctp_ulpq_renege_xxx functions [NETLINK]: Fix ACK processing after netlink_dump_start [VLAN]: MAINTAINERS update [DCCP]: Implement SIOCINQ/FIONREAD [NET]: Validate device addr prior to interface-up
2007-10-25Merge branch 'sg' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds1-12/+31
* 'sg' of git://git.kernel.dk/linux-2.6-block: fix sg_phys to use dma_addr_t ub: add sg_init_table for sense and read capacity commands x86: pci-gart fix blackfin: fix sg fallout xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it SG: audit of drivers that use blk_rq_map_sg() arch/um/drivers/ubd_kern.c: fix a building error SG: Change sg_set_page() to take length and offset argument AVR32: Fix sg_page breakage mmc: sg fallout m68k: sg fallout More SG build fixes sg: add missing sg_init_table calls to zfcp SG build fix
2007-10-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguestLinus Torvalds2-17/+11
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-lguest: lguest: documentation update lguest: Add to maintainers file. lguest: build fix lguest: clean up lguest_launcher.h lguest: remove unused "wake" element from struct lguest lguest: use defines from x86 headers instead of magic numbers lguest: example launcher header cleanup.
2007-10-25Merge branch 'upstream-linus' of ↵Linus Torvalds1-0/+4
git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: [netdrvr] forcedeth: add MCP77 device IDs rndis_host: reduce MTU instead of refusing to talk to devices with low max packet size cpmac: update to new fixed phy driver interface cpmac: convert to napi_struct interface cpmac: use print_mac() instead of MAC_FMT natsemi: fix oops, link back netdevice from private-struct ehea: fix port_napi_disable/enable bonding/bond_main.c: fix cut'n'paste error make bonding/bond_main.c:bond_deinit() static drivers/net/ipg.c: cleanups remove Documentation/networking/net-modules.txt
2007-10-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-schedLinus Torvalds2-25/+30
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: sched: mark CONFIG_FAIR_GROUP_SCHED as !EXPERIMENTAL sched: isolate SMP balancing code a bit more sched: reduce balance-tasks overhead sched: make cpu_shares_{show,store}() static sched: clean up some control group code sched: constify sched.h sched: document profile=sleep requiring CONFIG_SCHEDSTATS sched: use show_regs() to improve __schedule_bug() output sched: clean up sched_domain_debug() sched: fix fastcall mismatch in completion APIs sched: fix sched_domain sysctl registration again
2007-10-25Permit silencing of __deprecated warnings.Jeff Garzik1-0/+6
The __deprecated marker is quite useful in highlighting the remnants of old APIs that want removing. However, it is quite normal for one or more years to pass, before the (usually ancient, bitrotten) code in question is either updated or deleted. Thus, like __must_check, add a Kconfig option that permits the silencing of this compiler warning. This change mimics the ifdef-ery and Kconfig defaults of MUST_CHECK as closely as possible. Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-25fix sg_phys to use dma_addr_tHugh Dickins1-1/+2
x86_32 CONFIG_HIGHMEM64G with 5GB RAM hung when booting, after issuing some "request_module: runaway loop modprobe binfmt-0000" messages in trying to exec /sbin/init. The binprm buf doesn't see the right ".ELF" header because sg_phys() is providing the wrong physical addresses for high pages: a 32-bit unsigned long is too small in this case, we need to use dma_addr_t. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-25[netdrvr] forcedeth: add MCP77 device IDsAyaz Abdulla1-0/+4
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-25lguest: documentation updateRusty Russell2-3/+7
Went through the documentation doing typo and content fixes. This patch contains only comment and whitespace changes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-25lguest: clean up lguest_launcher.hRusty Russell1-14/+4
Remove now-unused defines. Fix old idempotent #ifndef _ASM_LGUEST_USER name. Fix comment on use of lguest_req. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-24sched: isolate SMP balancing code a bit morePeter Williams1-0/+2
At the moment, a lot of load balancing code that is irrelevant to non SMP systems gets included during non SMP builds. This patch addresses this issue and reduces the binary size on non SMP systems: text data bss dec hex filename 10983 28 1192 12203 2fab sched.o.before 10739 28 1192 11959 2eb7 sched.o.after Signed-off-by: Peter Williams <pwil3058@bigpond.net.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-24sched: reduce balance-tasks overheadPeter Williams1-2/+5
At the moment, balance_tasks() provides low level functionality for both move_tasks() and move_one_task() (indirectly) via the load_balance() function (in the sched_class interface) which also provides dual functionality. This dual functionality complicates the interfaces and internal mechanisms and makes the run time overhead of operations that are called with two run queue locks held. This patch addresses this issue and reduces the overhead of these operations. Signed-off-by: Peter Williams <pwil3058@bigpond.net.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-24sched: constify sched.hJoe Perches1-14/+14
Add const to some struct task_struct * uses Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-24sched: fix fastcall mismatch in completion APIsIngo Molnar1-9/+9
Jeff Dike noticed that wait_for_completion_interruptible()'s prototype had a mismatched fastcall. Fix this by removing the fastcall attributes from all the completion APIs. Found-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-24[DCCP]: Convert Reset code into socket error numberGerrit Renker1-0/+2
This adds support for converting the 11 currently defined Reset codes into system error numbers, which are stored in sk_err for further interpretation. This makes the externally visible API behaviour similar to TCP, since a client connecting to a non-existing port will experience ECONNREFUSED. * Code 0, Unspecified, is interpreted as non-error (0); * Code 1, Closed (normal termination), also maps into 0; * Code 2, Aborted, maps into "Connection reset by peer" (ECONNRESET); * Code 3, No Connection and Code 7, Connection Refused, map into "Connection refused" (ECONNREFUSED); * Code 4, Packet Error, maps into "No message of desired type" (ENOMSG); * Code 5, Option Error, maps into "Illegal byte sequence" (EILSEQ); * Code 6, Mandatory Error, maps into "Operation not supported on transport endpoint" (EOPNOTSUPP); * Code 8, Bad Service Code, maps into "Invalid request code" (EBADRQC); * Code 9, Too Busy, maps into "Too many users" (EUSERS); * Code 10, Bad Init Cookie, maps into "Invalid request descriptor" (EBADR); * Code 11, Aggression Penalty, maps into "Quota exceeded" (EDQUOT) which makes sense in terms of using more than the `fair share' of bandwidth. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2007-10-24[DCCP]: Retrieve packet sequence number for error reportingGerrit Renker1-6/+4
This fixes a problem when analysing erroneous packets in dccp_v{4,6}_err: * dccp_hdr_seq currently takes an skb * however, the transport headers in the skb are shifted, due to the preceding IPv4/v6 header. Fixed for v4 and v6 by changing dccp_hdr_seq to take a struct dccp_hdr as argument. Verified that the correct sequence number is now reported in the error handler. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2007-10-24SG: Change sg_set_page() to take length and offset argumentJens Axboe1-11/+29
Most drivers need to set length and offset as well, so may as well fold those three lines into one. Add sg_assign_page() for those two locations that only needed to set the page, where the offset/length is set outside of the function context. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-23[NET]: Treat the sign of the result of skb_headroom() consistentlyChuck Lever1-2/+2
In some places, the result of skb_headroom() is compared to an unsigned integer, and in others, the result is compared to a signed integer. Make the comparisons consistent and correct. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-23[NET]: Validate device addr prior to interface-upJeff Garzik1-0/+2
Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-23add port definition for mcf UART driverGreg Ungerer1-0/+3
Add a port type definition for the Freescale UART driver ports (mcf.c). Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-23Merge branch 'irq-upstream' of ↵Linus Torvalds1-11/+11
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 * 'irq-upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6: [SPARC, XEN, NET/CXGB3] use irq_handler_t where appropriate drivers/char/riscom8: clean up irq handling isdn/sc: irq handler clean isdn/act2000: fix major bug. clean irq handler. char/pcmcia/synclink_cs: trim trailing whitespace drivers/char/ip2: separate polling and irq-driven work entry points drivers/char/ip2: split out irq core logic into separate function [NETDRVR] lib82596, netxen: delete pointless tests from irq handler Eliminate pointless casts from void* in a few driver irq handlers. [PARPORT] Remove unused 'irq' argument from parport irq functions [PARPORT] Kill useful 'irq' arg from parport_{generic_irq,ieee1284_interrupt} [PARPORT] Consolidate code copies into a single generic irq handler
2007-10-23Merge branch 'upstream-linus' of ↵Linus Torvalds3-328/+33
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (39 commits) Remove Andrew Morton from list of net driver maintainers. bonding: Acquire correct locks in alb for promisc change bonding: Convert more locks to _bh, acquire rtnl, for new locking bonding: Convert locks to _bh, rework alb locking for new locking bonding: Convert miimon to new locking bonding: Convert balance-rr transmit to new locking Convert bonding timers to workqueues Update MAINTAINERS to reflect my (jgarzik's) current efforts. pasemi_mac: fix typo defxx.c: dfx_bus_init() is __devexit not __devinit s390 MAINTAINERS remove header_ops bug in qeth driver sky2: crash on remove MIPSnet: Delete all the useless debugging printks. AR7 ethernet: small post-merge cleanups and fixes mv643xx_eth: Hook up mv643xx_get_sset_count mv643xx_eth: Remove obsolete checksum offload comment mv643xx_eth: Merge drivers/net/mv643xx_eth.h into mv643xx_eth.c mv643xx_eth: Remove unused register defines mv643xx_eth: Clean up mv643xx_eth.h ...
2007-10-23[libata] checkpatch-inspired cleanupsJeff Garzik2-14/+14
Tackle the relatively sane complaints of checkpatch --file. The vast majority is indentation and whitespace changes, the rest are * #include fixes * printk KERN_xxx prefix addition * BSS/initializer cleanups Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-23remove header_ops bug in qeth driverUrsula Braun1-1/+1
Remove qeth bug caused by commit: [NET]: Move hardware header operations out of netdevice. This is the second part of the qeth header_ops patch, since first patch sent 10/19 has been insufficient. Nevertheless first patch is still valid and should be kept. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-23Merge branch 'features' of git://farnsworth.org/dale/linux-2.6-mv643xx_eth ↵Jeff Garzik2-327/+32
into upstream
2007-10-23[PARPORT] Remove unused 'irq' argument from parport irq functionsJeff Garzik1-8/+4
None of the drivers with a struct pardevice's ->irq_func() hook ever used the 'irq' argument passed to it, so remove it. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-23[PARPORT] Kill useful 'irq' arg from parport_{generic_irq,ieee1284_interrupt}Jeff Garzik1-4/+4
parport_ieee1284_interrupt() was not using its first arg at all. Delete. parport_generic_irq()'s second arg makes its first arg completely redundant. Delete, and use port->irq in the one place where we actually need it. Also, s/__inline__/inline/ to make the code look nicer. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-23[PARPORT] Consolidate code copies into a single generic irq handlerJeff Garzik1-1/+5
Several arches used the exact same code for their parport irq handling. Make that code generic, in parport_irq_handler(). Also, s/__inline__/inline/ in include/linux/parport.h. Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2007-10-23Merge branch 'for-linus' of ↵Linus Torvalds1-0/+10
git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs: 9p: v9fs_vfs_rename incorrect clunk order 9p: fix memleak in fs/9p/v9fs.c 9p: add virtio transport
2007-10-239p: add virtio transportEric Van Hensbergen1-0/+10
This adds a transport to 9p for communicating between guests and a host using a virtio based transport. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
2007-10-23[SG] Add debug check for page alignmentJens Axboe1-0/+5
Suggested by Boaz Harrosh <bharrosh@panasas.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-10-23Merge branch 'for-linus' of ↵Linus Torvalds1-11/+0
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: mlx4_core: Increase command timeout for INIT_HCA to 10 seconds IPoIB/cm: Use common CQ for CM send completions IB/uverbs: Fix checking of userspace object ownership IB/mlx4: Sanity check userspace send queue sizes IPoIB: Rewrite "if (!likely(...))" as "if (unlikely(!(...)))" IB/ehca: Enable large page MRs by default IB/ehca: Change meaning of hca_cap_mr_pgsize IB/ehca: Fix ehca_encode_hwpage_size() and alloc_fmr() IB/ehca: Fix masking error in {,re}reg_phys_mr() IB/ehca: Supply QP token for SRQ base QPs IPoIB: Use round_jiffies() for ah_reap_task RDMA/cma: Fix deadlock destroying listen requests RDMA/cma: Add locking around QP accesses IB/mthca: Avoid alignment traps when writing doorbells mlx4_core: Kill mlx4_write64_raw()
2007-10-23mv643xx_eth: Move ethernet register definitions into private headerLennert Buytenhek1-302/+0
Move the mv643xx's ethernet-related register definitions from include/linux/mv643xx.h into drivers/net/mv643xx_eth.h, since they aren't of any use outside the ethernet driver. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Acked-by: Tzachi Perelstein <tzachi@marvell.com> Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
2007-10-23mv643xx_eth: Split off mv643xx_eth platform device dataLennert Buytenhek2-25/+32
The mv643xx ethernet silicon block is also found in a couple of other Marvell chips. As a first step towards splitting off the mv643xx_eth bits from the rest of the mv643xx bits, this patch splits the mv643xx ethernet platform device data struct in linux/mv643xx.h off into linux/mv643xx_eth.h, and includes the latter from the former. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Acked-by: Tzachi Perelstein <tzachi@marvell.com> Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
2007-10-23Lguest support for VirtioRusty Russell1-28/+19
This makes lguest able to use the virtio devices. We change the device descriptor page from a simple array to a variable length "type, config_len, status, config data..." format, and implement virtio_config_ops to read from that config data. We use the virtio ring implementation for an efficient Guest <-> Host virtqueue mechanism, and the new LHCALL_NOTIFY hypercall to kick the host when it changes. We also use LHCALL_NOTIFY on kernel addresses for very very early console output. We could have another hypercall, but this hack works quite well. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-23Remove old lguest I/O infrrasructure.Rusty Russell1-35/+1
This patch gets rid of the old lguest host I/O infrastructure and replaces it with a single hypercall "LHCALL_NOTIFY" which takes an address. The main change is the removal of io.c: that mainly did inter-guest I/O, which virtio doesn't yet support. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-23Remove old lguest bus and drivers.Rusty Russell2-77/+0
This gets rid of the lguest bus, drivers and DMA mechanism, to make way for a generic virtio mechanism. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-23Virtio helper routines for a descriptor ringbuffer implementationRusty Russell1-0/+119
These helper routines supply most of the virtqueue_ops for hypervisors which want to use a ring for virtio. Unlike the previous lguest implementation: 1) The rings are variable sized (2^n-1 elements). 2) They have an unfortunate limit of 65535 bytes per sg element. 3) The page numbers are always 64 bit (PAE anyone?) 4) They no longer place used[] on a separate page, just a separate cacheline. 5) We do a modulo on a variable. We could be tricky if we cared. 6) Interrupts and notifies are suppressed using flags within the rings. Users need only get the ring pages and provide a notify hook (KVM wants the guest to allocate the rings, lguest does it sanely). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dor Laor <dor.laor@qumranet.com>
2007-10-23Virtio console driverRusty Russell1-0/+12
This is an hvc-based virtio console driver. It's suboptimal becuase hvc expects to have raw access to interrupts and virtio doesn't assume that, so it currently polls. There are two solutions: expose hvc's "kick" interface, or wean off hvc. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-10-23Block driver using virtio.Rusty Russell2-0/+52
The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <jens.axboe@oracle.com>
2007-10-23Net driver using virtioRusty Russell2-0/+37
The network driver uses two virtqueues: one for input packets and one for output packets. This has nice locking properties (ie. we don't do any for recv vs send). TODO: 1) Big packets. 2) Multi-client devices (maybe separate driver?). 3) Resolve freeing of old xmit skbs (Christian Borntraeger) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: netdev@vger.kernel.org
2007-10-23Virtio interfaceRusty Russell4-0/+228
This attempts to implement a "virtual I/O" layer which should allow common drivers to be efficiently used across most virtual I/O mechanisms. It will no-doubt need further enhancement. The virtio drivers add buffers to virtio queues; as the buffers are consumed the driver "interrupt" callbacks are invoked. There is also a generic implementation of config space which drivers can query to get setup information from the host. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Cc: Dor Laor <dor.laor@qumranet.com> Cc: Arnd Bergmann <arnd@arndb.de>
2007-10-23Boot with virtual == physical to get closer to native Linux.Rusty Russell1-1/+4
1) This allows us to get alot closer to booting bzImages. 2) It means we don't have to know page_offset. 3) The Guest needs to modify the boot pagetables to create the PAGE_OFFSET mapping before jumping to C code. 4) guest_pa() walks the page tables rather than using page_offset. 5) We don't use page_offset to figure out whether to emulate: it was always kinda quesationable, and won't work for instructions done before remapping (bzImage unpacking in particular). 6) We still want the kernel address for tlb flushing: have the initial hypercall give us that, too. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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