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2014-02-26PCI: better document driver and device requirementsrusty
Feedback: 10) 4.1.3.1.2 Queue Vector Configuration Some of the information from section 8.4 needs to be moved to here, for example that the device may have an MSI-X table size other than 2048. Otherwise, this reads as though the MSI-X table must always have 2048 entries. 11) Please explicitly describe the device behavior when writing a vector value beyond the MSI-X table size. Address these comments. Cc: Arun Subbarao <asubbarao@lnxw.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@255 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-26feedback: minor wording cleanupsrusty
We already mention requirement for natural width accesses for non device specific configuration. Don't repeat this in legacy section. Further, mention virtio pci structure in preamble to help link sections together. Cc: Arun Subbarao <asubbarao@lnxw.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Conflicts: content.tex git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@254 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-26SCSI: fix up more fields.rusty
Some missing \field{} markings, and a few redundant "the XXX field". Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@253 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-20SCSI: missing space.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@252 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-19Gratuitous Packet Sending: clarify wording.rusty
The device can ask, not the driver. Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@251 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-19net: fix incorrect reference.rusty
It pointed into the block section for some reason. Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@250 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-13ccw: padding annotationscornelia.huck
Remove __packed__ annotation from all ccw structures that don't need it, and make the length requirements explicit for those that do. This is the part of the patch to resolve VIRTIO-56 that had been missed. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@249 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: minor wording changemstsirkin
Since access width requirement is a confirmance clause, make it explicit that it applies to 4,2 and 1 byte fields. Also explain what happens to fields of other widths (such as the 6 byte MAC). Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@248 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12content: more strict confirmance languagemstsirkin
Correct new language to explicitly use MAY/SHOULD/MUST in more places or simply drop the somewhat vague "can" where we are describing the only way to operate the device. Most of the changes are in the PCI section. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@247 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12introduction: address lnovich commentsmstsirkin
generally list of buses is out of date, list all supported buses. Drop explicit mention of lguest since it's not part of the spec. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@246 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12abstract: address lnovich commentmstsirkin
lnovich@redhat.com suggested rewording abstract, making the following point: . from what point of view is virtio like a physical device? it's very different from host POV . "the guest" appears out of nowhere. It's the guest that runs in the vm of course. . "not all that different" means similar so there's not need to be verbose Address this comment Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@245 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12VIRTIO-55: Add a reserved ID for GPU devicesrusty
As existing work on virtio-gpu is using device ID 16, reflect this in the spec. This closes out VIRTIO-55. As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Paul Mundt <paul.mundt@huawei.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@244 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Fix S390 normative references.rusty
As pointed out in TAB-539 and TAB-540: - Add an URL to the documents. (Unfortunately, there is no link that always points to the latest version.) - State that we include any future revisions as well. As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@243 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12ccw: Further use of RFC2119 language.rusty
Some more instances of MAY and SHOULD, as reported in TAB comments TAB-548 and TAB-550. As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@242 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: explicitly document ISR status fieldrusty
Feedback on ISR status register: It would be helpful if this section provided the meaning of each bit in the register. ISR use is scattered all around the place. Add a section describing the format and semantics. [ Merged to combine with new ISR-specific section --RR ] As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Cc: Arun Subbarao <asubbarao@lnxw.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@241 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: consistent device/PCI configuration spacerusty
Re section: 4.1.3.4 Notification of Device Configuration Changes Feedback: Please use "PCI configuration space" and "device configuration state" consistently, without abbreviation. For example, from the first sentence it looks like "device configuration state" can be changed, but the first bullet claims it's "configuration space". So, which one? Does "configuration space" mean "PCI configuration space" or is it a synonym for "device configuration state"? Because those are two different things; the driver needs to know what exactly to rescan. As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Cc: Arun Subbarao <asubbarao@lnxw.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@240 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Feedback #8: Applied.rusty
[ Includes fixup! removing MSI-X ] As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@239 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Feedback #7: Appliedrusty
Some minor merging required. As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@238 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Feedback #6: Appliedrusty
As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@237 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Feedback #5: Applied.rusty
As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@236 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12Feedback #4: applied.rusty
As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@235 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: minor changes for previous patch.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@234 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: rearrange it allrusty
This is the re-arrangement originally suggested by Rusty, except I made some fixes and also tweaked a couple of places where behaviour changes where suggested - if we want these, they should go in separately. Rearrange discovery section to make it clearer what goes on. Wording changes MUST/MAY/etc. Clarify cfg gateway use. No behavioural changes. [ Merged "fixup! PCI: rearrange it all" --RR ] As per minutes: https://lists.oasis-open.org/archives/virtio/201402/msg00121.html Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@233 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12PCI: rearrange it allrusty
This is the re-arrangement originally suggested by Rusty, except I made some fixes and also tweaked a couple of places where behaviour changes where suggested - if we want these, they should go in separately. Rearrange discovery section to make it clearer what goes on. Wording changes MUST/MAY/etc. Clarify cfg gateway use. No behavioural changes. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@232 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-12C struct specifications.rusty
Explicitly specify that our C struct specifications are without padding, and add some definitions for our integer data types. [ Rusty - added /* comments */ and removed redundant old le* explanation ] Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@231 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-11feedback: add more replacements of read-only.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@230 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-11Feedback: minor clarity update from Thomas.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@229 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-11Feedback: fix formatting typo.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@228 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10Merge together all feedback from Arun.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@227 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10Feedback: update so it applies sequentially.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@226 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10REVERT LAST 15 JUNK COMMITS.rusty
Back to r211. It's been a long day. Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@225 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-8-9.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@224 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-8-7.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@223 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-8-6.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@222 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-8-5.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@221 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10feedback: s/virtio header/virtio common configuration/rusty
While most places now sat virtio common configuration structure, some places still use the term virtio header. Since it's not necessarily before the common configuration anymore, rename it to virtio common configuration structure for consistency. Cc: Arun Subbarao <asubbarao@lnxw.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@220 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10We'll add more non-normative sections with hints forrusty
implementing registers such as PCI class, status and command registers. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@219 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10example code does not have to be optimal but itrusty
seems cleaner to disable interrupts after we recheck the ring empty state. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@218 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-7-orig.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@217 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-6.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@216 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-5.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@215 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10patch feedback-4.patchrusty
git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@214 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10PCI Section Reworkrusty
1) Minor changes from must to MUST etc. 2) More references using \ref. 3) Move section on capabilities first, before we talk about the common config layout. The previous order made sense for legacy. 4) Make explicit subsections for each type of capability and move more information into them. 5) Make it clear that there must be one or more. 6) Include 'struct virtio_pci_cap cap;' in struct virtio_pci_cfg_cap to match virtio_pci_notify_cap. 7) Explicitly note there's no way to negotiate the queue size for a legacy device. 8) Fix old language on config change event: config is not in the pci configuration space. 9) Explicitly state what the driver should do to use virtio_pci_cfg_cap. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@213 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10C struct specifications.rusty
Explicitly specify that our C struct specifications are without padding, and add some definitions for our integer data types. [ Rusty - added /* comments */ and removed redundant old le* explanation ] Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@212 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10Feedback: more clarity on aim of ring layout & cache effects.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@211 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10Feedback: more introduction reworking from MST.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@210 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-10ccw: missed field conversionsrusty
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@209 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-09More feedback updates from Thomas.rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@208 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-07Cleanup and setup clarificationsrusty
1) Explicitly allow drivers to read config space during feature negotiation. 2) Add the concept of a "live" virtqueue, and explicitly disallow moving it backwards or changing descriptors. Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@207 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
2014-02-07More feedback (partial)rusty
Signed-off-by: Rusty Russell <rusty@au1.ibm.com> git-svn-id: https://tools.oasis-open.org/version-control/svn/virtio@206 0c8fb4dd-22a2-4bb5-bc14-6c75a5f43652
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