- 04 Feb, 2008 13 commits
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Anthony Liguori authored
This patch moves virtio under the virtualization menu and changes virtio devices to not claim to only be for lguest. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Anthony Liguori found double interrupt suppression in the virtio_net driver, triggered by two skb_recv_done's in a row. This is because virtio_ring's interrupt suppression is a best-effort optimization: it contains no synchronization so the host can miss it and still send interrupts. But it's certainly nicer for virtio users if calling disable_cb actually disables callbacks, so we check for the race in the interrupt routine. Note: SMP guests might require syncronization here, but since disable_cb is actually called from interrupt context, there has to be some form of synchronization before the next same interrupt handler is called (Linux guarantees that the same device's irq handler will never run simultanously on multiple CPUs). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
A reset function solves three problems: 1) It allows us to renegotiate features, eg. if we want to upgrade a guest driver without rebooting the guest. 2) It gives us a clean way of shutting down virtqueues: after a reset, we know that the buffers won't be used by the host, and 3) It helps the guest recover from messed-up drivers. So we remove the ->shutdown hook, and the only way we now remove feature bits is via reset. We leave it to the driver to do the reset before it deletes queues: the balloon driver, for example, needs to chat to the host in its remove function. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Since we want to reset the device to remove them, this is simpler (device is reset for us on driver remove). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
1) Turn GSO on virtio net into an all-or-nothing (keep checksumming separate). Having multiple bits is a pain: if you can't support something you should handle it in software, which is still a performance win. 2) Make VIRTIO_NET_HDR_GSO_ECN a flag in the header, so it can apply to IPv6 or v4. 3) Rename VIRTIO_NET_F_NO_CSUM to VIRTIO_NET_F_CSUM (ie. means we do checksumming). 4) Add csum and gso params to virtio_net to allow more testing. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
It's far easier to deal with packets if we don't have to parse the packet to figure out the header length to know how much to pull into the skb data. Add the field to the virtio_net_hdr struct (and fix the spaces that somehow crept in there). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
This field has been unused since an older version of virtio. Remove it now before we freeze the ABI. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au.
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Rusty Russell authored
The other side (host) can set the NO_NOTIFY flag as an optimization, to say "no need to kick me when you add things". Make it clear that this is advisory only; especially that we should always notify when the ring is full. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Anthony Liguori authored
Using unsigned int resulted in silent truncation of the upper 32-bit on x86_64 resulting in an OOPS since the ring was being initialized wrong. Please reconsider my previous patch to just use PAGE_ALIGN(). Open coding this sort of stuff, no matter how simple it seems, is just asking for this sort of trouble. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Various drivers want to know when their configuration information changes: the balloon driver is the immediate user, but the network driver may one day have a "carrier" status as well. This introduces that callback (lguest doesn't use it yet). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
It seems that virtio_net wants to disable callbacks (interrupts) before calling netif_rx_schedule(), so we can't use the return value to do so. Rename "restart" to "cb_enable" and introduce "cb_disable" hook: callback now returns void, rather than a boolean. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Previously we used a type/len pair within the config space, but this seems overkill. We now simply define a structure which represents the layout in the config space: the config space can now only be extended at the end. The main driver-visible changes: 1) We indicate what fields are present with an explicit feature bit. 2) Virtqueues are explicitly numbered, and not in the config space. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell authored
Use it in virtio_net (replacing buggy version there), it's also going to be used by TAP for partial csum support. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: David S. Miller <davem@davemloft.net>
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- 02 Feb, 2008 27 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (95 commits) ide-tape: remove idetape_config_t typedef ide-tape: remove mtio.h related comments ide-tape: make function name more accurate ide-tape: remove unused sense packet commands. ide-tape: use generic byteorder macros ide-tape: remove EXPERIMENTAL driver status ide-tape: use generic scsi commands ide-tape: remove struct idetape_block_size_page_t ide-tape: remove structs os_partition_t, os_dat_entry_t, os_dat_t ide-tape: remove struct idetape_parameter_block_descriptor_t ide-tape: remove struct idetape_medium_partition_page_t ide-tape: remove struct idetape_data_compression_page_t ide-tape: remove struct idetape_inquiry_result_t ide-tape: remove struct idetape_capabilities_page_t ide-tape: remove IDETAPE_DEBUG_BUGS ide-tape: remove IDETAPE_DEBUG_INFO ide-tape: dump gcw fields on error in idetape_identify_device() ide-tape: remove struct idetape_mode_parameter_header_t ide-tape: remove struct idetape_request_sense_result_t ide-tape: remove dead code ...
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Nick Piggin authored
Frederik Himpe reported an unkillable and un-straceable pan process. Zero length iovecs can go into an infinite loop in writev, because the iovec iterator does not always advance over them. The sequence required to trigger this is not trivial. I think it requires that a zero-length iovec be followed by a non-zero-length iovec which causes a pagefault in the atomic usercopy. This causes the writev code to drop back into single-segment copy mode, which then tries to copy the 0 bytes of the zero-length iovec; a zero length copy looks like a failure though, so it loops. Put a test into iov_iter_advance to catch zero-length iovecs. We could just put the test in the fallback path, but I feel it is more robust to skip over zero-length iovecs throughout the code (iovec iterator may be used in filesystems too, so it should be robust). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: ieee1394: sbp2: fix bogus s/g access change
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Borislav Petkov authored
Since this is used only in idetape_blkdev_ioctl(), remove the typedef and make the struct function-local. Bart: - s/sizeof(struct idetape_config)/sizeof(config)/ Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Those are already in mtio.h. Bart: - undo 'unsigned int/unsigned long' -> 'uint/ulong' conversion Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
idetape_active_next_stage() was rather ambiguous wrt its purpose. Make that more explicit and remove superfluous comment. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
This is not a network driver. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
ide-tape has depended on EXPERIMENTAL for ages. Change that since the driver is being only maintained now. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Also, remove those which weren't used. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
They seem just to sit there completely unused. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Also, shorten function name idetape_get_blocksize_from_block_descriptor() and move its definition up thereby getting rid of its forward declaration. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
There should be no functional changes resulting from this patch. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
There should be no functional changes resulting from this patch. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
There should be no functional changes resulting from this patch. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
All those 2-byte values denoting the different capabilities are being written to the local copy of the caps buffer without being converted to big endian for simplicity of usage and shorter code later. Also, we add some comments stating which are the fields of the caps page in question in order to alleviate the cryptic pointer casting exercises as in e.g. idetape_get_mode_sense_results(). There should be no functional changes resulting from this patch. Bart: - remove two needless "!!" Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
The device capabilities are probed for during device initialization so this info is available through proc/ioctl() und it is redundant here. Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz authored
Cc: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Bart: - remove 'capabilities->speed' chunk - re-add brackets to block_descrp assignment Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Bart: - remove unnecessary comment change - remove two needless "!!" Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Borislav Petkov authored
Also, cleanup whitespace and update comments. Bart: - remove reference to drivers/block/ide.c - move driver documentation to Documentation/ide/ide-tape.txt Signed-off-by: Borislav Petkov <bbpetkov@yahoo.de> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz authored
No reason to use ide_init_hwif_ports() in ide-cs (as a nice side-effect this makes ide-cs work on archs that don't define IDE_ARCH_OBSOLETE_INIT). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz authored
* Move check_dma_crc() to ide-dma.c and add inline version for CONFIG_BLK_DEV_IDEDMA=n case. * Rename check_dma_crc() to ide_check_dma_crc(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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Bartlomiej Zolnierkiewicz authored
While at it: * Remove needless '!drive->crc_count' check. Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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