[src/trunk]: src/sys/arch/arm/nvidia Add support for PCI_INTR_MPSAFE

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/0fd76a8d776d
branches:  trunk
changeset: 823225:0fd76a8d776d
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Apr 16 18:05:35 2017 +0000

description:
Add support for PCI_INTR_MPSAFE

diffstat:

 sys/arch/arm/nvidia/tegra_pcie.c |  34 ++++++++++++++++++++++++++++++----
 1 files changed, 30 insertions(+), 4 deletions(-)

diffs (99 lines):

diff -r b51f1daf5926 -r 0fd76a8d776d sys/arch/arm/nvidia/tegra_pcie.c
--- a/sys/arch/arm/nvidia/tegra_pcie.c  Sun Apr 16 18:02:50 2017 +0000
+++ b/sys/arch/arm/nvidia/tegra_pcie.c  Sun Apr 16 18:05:35 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_pcie.c,v 1.15 2016/08/17 00:22:56 jakllsch Exp $ */
+/* $NetBSD: tegra_pcie.c,v 1.16 2017/04/16 18:05:35 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2015 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_pcie.c,v 1.15 2016/08/17 00:22:56 jakllsch Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_pcie.c,v 1.16 2017/04/16 18:05:35 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -62,6 +62,7 @@
        int                     (*ih_callback)(void *);
        void                    *ih_arg;
        int                     ih_ipl;
+       int                     ih_mpsafe;
        TAILQ_ENTRY(tegra_pcie_ih) ih_entry;
 };
 
@@ -109,6 +110,8 @@
 static const char *tegra_pcie_intr_string(void *, pci_intr_handle_t,
                                          char *, size_t);
 const struct evcnt *tegra_pcie_intr_evcnt(void *, pci_intr_handle_t);
+static int     tegra_pcie_intr_setattr(void *, pci_intr_handle_t *, int,
+                                       uint64_t);
 static void *  tegra_pcie_intr_establish(void *, pci_intr_handle_t,
                                         int, int (*)(void *), void *);
 static void    tegra_pcie_intr_disestablish(void *, void *);
@@ -181,8 +184,8 @@
                return;
        }
 
-       sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_VM, 0,
-           tegra_pcie_intr, sc);
+       sc->sc_ih = fdtbus_intr_establish(faa->faa_phandle, 0, IPL_VM,
+           FDT_INTR_MPSAFE, tegra_pcie_intr, sc);
        if (sc->sc_ih == NULL) {
                aprint_error_dev(self, "failed to establish interrupt on %s\n",
                    intrstr);
@@ -248,8 +251,15 @@
                TAILQ_FOREACH(pcie_ih, &sc->sc_intrs, ih_entry) {
                        int (*callback)(void *) = pcie_ih->ih_callback;
                        void *arg = pcie_ih->ih_arg;
+                       const int mpsafe = pcie_ih->ih_mpsafe;
                        mutex_exit(&sc->sc_lock);
+
+                       if (!mpsafe)
+                               KERNEL_LOCK(1, curlwp);
                        rv += callback(arg);
+                       if (!mpsafe)
+                               KERNEL_UNLOCK_ONE(curlwp);
+
                        mutex_enter(&sc->sc_lock);
                        if (lastgen != sc->sc_intrgen)
                                break;
@@ -434,6 +444,7 @@
        pc->pc_intr_map = tegra_pcie_intr_map;
        pc->pc_intr_string = tegra_pcie_intr_string;
        pc->pc_intr_evcnt = tegra_pcie_intr_evcnt;
+       pc->pc_intr_setattr = tegra_pcie_intr_setattr;
        pc->pc_intr_establish = tegra_pcie_intr_establish;
        pc->pc_intr_disestablish = tegra_pcie_intr_disestablish;
 }
@@ -577,6 +588,20 @@
        return NULL;
 }
 
+static int
+tegra_pcie_intr_setattr(void *v, pci_intr_handle_t *ih, int attr, uint64_t data)
+{
+       struct tegra_pcie_ih *pcie_ih = (struct tegra_pcie_ih *)*ih;
+
+       switch (attr) {
+       case PCI_INTR_MPSAFE:
+               pcie_ih->ih_mpsafe = data;
+               return 0;
+       default:
+               return ENODEV;
+       }
+}
+
 static void *
 tegra_pcie_intr_establish(void *v, pci_intr_handle_t ih, int ipl,
     int (*callback)(void *), void *arg)
@@ -591,6 +616,7 @@
        pcie_ih->ih_callback = callback;
        pcie_ih->ih_arg = arg;
        pcie_ih->ih_ipl = ipl;
+       pcie_ih->ih_mpsafe = 0;
 
        mutex_enter(&sc->sc_lock);
        TAILQ_INSERT_TAIL(&sc->sc_intrs, pcie_ih, ih_entry);