CVS log for src/sys/arch/x86/pci/pci_msi_machdep.c

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Keyword substitution: kv
Default branch: MAIN

pci_machdep.c & pci_msi_machdep.c: comment fixes

Correct spelling and grammar in some comments.

s/requied/required/ in comments (likely grammar should be also improved in the
future).

Work in progress on MSI/MSI-X on Xen (MSI works on my hardware, more work
needed for MSI-X):
- Xen silently rejects 32 bits writes to MSI configuration registers
  (especially when setting PCI_MSI_CTL_MSI_ENABLE/PCI_MSIX_CTL_ENABLE),
  it expects 16 bits writes. So introduce a pci_conf_write16(),
  only available on XENPV (and working only for mode 1 without
  PCI_OVERRIDE_CONF_WRITE) and use it to enable MSI or MSI-X on XENPV.
- for multi-MSI vectors, Xen allocates all of them in a single hypercall,
  so it's not convenient to do it at intr_establish() time.
  So do it at alloc() time and register the pirqs in the msipic structure.
  xen_pic_to_gsi() now just returns the values cached in the msipic.
  As a bonus, if the PHYSDEVOP_map_pirq hypercall fails we can fail
  the alloc() and we don't need the xen_pci_msi*_probe() hacks.

options NO_PCI_MSI_MSIX still on by default for XEN3_DOM0.

s/futher/further/ in comment.

Sync with HEAD.

Remoave an extra space from a comment

for Xen MSI, fallback to INTx when PHYSDEVOP_map_pirq fails for the device

apparently Xen requires VT-d to be enabled in BIOS for PHYSDEVOP_map_pirq
to work, this change makes it work on systems with VT-d disabled or missing

adresses the panic part of PR port-xen/55285 by Patrick Welche

update from HEAD

Sync with HEAD

file pci_msi_machdep.c was added on branch tls-maxphys on 2017-12-03 11:36:50 +0000

Don't include malloc.h.

remove checks for failure after memory allocation calls that cannot fail:

  kmem_alloc() with KM_SLEEP
  kmem_zalloc() with KM_SLEEP
  percpu_alloc()
  pserialize_create()
  psref_class_create()

all of these paths include an assertion that the allocation has not failed,
so callers should not assert that again.

Sync with HEAD

Sync with HEAD

disable msi/msix when the system doesn't detect ioapic. This would fix PR kern/52111.

Some system does not detect ioapic when "boot -1", disable acpi, and so on.
In such cases, msi/msix doesn't work, so disable them.

This patch is implemented by nonaka@n.o, I just commit by proxy, thanks.

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Sync with HEAD

fix build of amd64/i386 with NO_PCI_MSI_MSIX option.

Sync with HEAD

Add kernel code to support intrctl(8).

- Don't take pci_attach_args as an argument in pci_msi[x]_count().
- Move prototypes of pci_msi[x]_count() from x86/x86/pci_machdep_common to
  sys/dev/pci/pcivar.h.
- Move pci_msi[x]_count() from x86/pci/pci_msi_machdep.c to sys/dev/pci/pci.c

 Add missing opt_intrdebug.h.

Don't check PCI_FLAGS_"MSI"_OKAY in pci_"msix"_alloc_common().
OK'd by knakahara.

Sync with HEAD

file pci_msi_machdep.c was added on branch nick-nhusb on 2015-06-06 14:40:04 +0000

pci_msi_string() must be used by MD code only.

refactor: change function names and move them.

unify INTx, MSI and MSI-X APIs without alloc. (alloc API is under discussion)

add a const qualifier to struct pci_attach_args *pa argument

add x86 MD MSI/MSI-X support code.