[PATCH rumpkernel] pci-userspace: Add acpi lookup of irqs with fallback

[Damien Zammit]

This adds support for looking up IRQ numbers via hurd's acpi translator.
It falls back to the existing IRQ number if acpi cannot provide it.

---
 debian/patches/acpi.diff | 76 ++++++++++++++++++++++++++++++++++++++++
 debian/patches/series    |  1 +
 2 files changed, 77 insertions(+)
 create mode 100644 debian/patches/acpi.diff

diff --git a/debian/patches/acpi.diff b/debian/patches/acpi.diff
new file mode 100644
index 000000000..2788dad22
--- /dev/null
+++ b/debian/patches/acpi.diff
@@ -0,0 +1,76 @@
+--- a/pci-userspace/src-gnu/Makefile.inc
++++ b/pci-userspace/src-gnu/Makefile.inc
+@@ -3,7 +3,7 @@
+ PCIDIR:=      ${.PARSEDIR}
+ .PATH:                ${PCIDIR}
+
+-RUMPCOMP_USER_SRCS=   pci_user-gnu.c mach_debugUser.c
++RUMPCOMP_USER_SRCS=   pci_user-gnu.c mach_debugUser.c acpiUser.c
+ RUMPCOMP_USER_CPPFLAGS+=-I${PCIDIR} -I${DESTDIR}/usr/include
+ RUMPCOMP_CPPFLAGS+=   -I${PCIDIR} -I${DESTDIR}/usr/include
+ CPPFLAGS+=            -I${PCIDIR}
+@@ -16,3 +16,11 @@
+                       -user mach_debugUser.c \
+                       -server /dev/null \
+                       -header mach_debug_U.h
++
++acpiUser.c:
++      echo '#include <hurd/acpi.defs>' \
++              | ${CC} -E -x c - -o - \
++              | mig -cc cat - /dev/null -subrprefix __ \
++                      -user acpiUser.c \
++                      -server /dev/null \
++                      -header acpi_U.h
+--- a/pci-userspace/src-gnu/pci_user-gnu.c
++++ b/pci-userspace/src-gnu/pci_user-gnu.c
+@@ -67,6 +67,7 @@
+ #include <device/device.h>
+ #include <mach/gnumach.h>
+ #include "mach_debug_U.h"
++#include "acpi_U.h"
+ #include <mach/vm_param.h>
+ #include <mach.h>
+
+@@ -90,6 +91,7 @@
+ static mach_port_t master_host;
+ static mach_port_t master_device;
+ static device_t irq_dev;
++static device_t acpi_dev;
+
+ #define PCI_CFG1_START 0xcf8
+ #define PCI_CFG1_END   0xcff
+@@ -130,6 +132,11 @@
+       if (device_open (master_device, D_READ, "irq", &irq_dev))
+               err(2, "device_open irq");
+
++      /* Optional */
++      if (device_open (master_device, D_READ, "acpi", &acpi_dev)) {
++              MACH_PRINT("device_open acpi failed... continue\n");
++      }
++
+       pci_system_init ();
+       struct pci_device_iterator *dev_iter;
+       struct pci_device *pci_dev;
+@@ -363,6 +370,7 @@
+ rumpcomp_pci_irq_map(unsigned bus, unsigned dev, unsigned fun,
+       int intrline, unsigned cookie)
+ {
++      int ret;
+       struct irq *irq;
+       irq = malloc(sizeof(*irq));
+       if (irq == NULL)
+@@ -372,7 +380,13 @@
+       irq->bus = bus;
+       irq->dev = dev;
+       irq->fun = fun;
+-      irq->intrline = intrline;
++
++      /* We can do better by reading irq from acpi device, but with fallback 
*/
++      ret = acpi_get_pci_irq (acpi_dev, bus, dev, fun, &irq->intrline);
++      if (ret) {
++              irq->intrline = intrline;
++              MACH_PRINT("acpi_get_pci_irq failed, continue with intrline\n");
++      }
+
+       pthread_mutex_lock(&genericmtx);
+       LIST_INSERT_HEAD(&irqs, irq, entries);
diff --git a/debian/patches/series b/debian/patches/series
index 5654d3549..adbc5acb9 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -14,3 +14,4 @@ pci-userspace-rump.diff
 rumpuser-evcnt.diff
 ps-comm.diff
 idtype_t.diff
+acpi.diff
--
2.34.1