1 files changed, 170 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c
new file mode 100644
index 000000000000..25e3b9644a3f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mc/base.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include "priv.h"
+#include <core/option.h>
+
+static inline void
+nouveau_mc_unk260(struct nouveau_mc *pmc, u32 data)
+{
+        const struct nouveau_mc_oclass *impl = (void *)nv_oclass(pmc);
+        if (impl->unk260)
+                impl->unk260(pmc, data);
+}
+
+static inline u32
+nouveau_mc_intr_mask(struct nouveau_mc *pmc)
+{
+        u32 intr = nv_rd32(pmc, 0x000100);
+        if (intr == 0xffffffff) /* likely fallen off the bus */
+                intr = 0x00000000;
+        return intr;
+}
+
+static irqreturn_t
+nouveau_mc_intr(int irq, void *arg)
+{
+        struct nouveau_mc *pmc = arg;
+        const struct nouveau_mc_oclass *oclass = (void *)nv_object(pmc)->oclass;
+        const struct nouveau_mc_intr *map = oclass->intr;
+        struct nouveau_subdev *unit;
+        u32 intr;
+
+        nv_wr32(pmc, 0x000140, 0x00000000);
+        nv_rd32(pmc, 0x000140);
+        intr = nouveau_mc_intr_mask(pmc);
+        if (pmc->use_msi)
+                oclass->msi_rearm(pmc);
+
+        if (intr) {
+                u32 stat = intr = nouveau_mc_intr_mask(pmc);
+                while (map->stat) {
+                        if (intr & map->stat) {
+                                unit = nouveau_subdev(pmc, map->unit);
+                                if (unit && unit->intr)
+                                        unit->intr(unit);
+                                stat &= ~map->stat;
+                        }
+                        map++;
+                }
+
+                if (stat)
+                        nv_error(pmc, "unknown intr 0x%08x\n", stat);
+        }
+
+        nv_wr32(pmc, 0x000140, 0x00000001);
+        return intr ? IRQ_HANDLED : IRQ_NONE;
+}
+
+int
+_nouveau_mc_fini(struct nouveau_object *object, bool suspend)
+{
+        struct nouveau_mc *pmc = (void *)object;
+        nv_wr32(pmc, 0x000140, 0x00000000);
+        return nouveau_subdev_fini(&pmc->base, suspend);
+}
+
+int
+_nouveau_mc_init(struct nouveau_object *object)
+{
+        struct nouveau_mc *pmc = (void *)object;
+        int ret = nouveau_subdev_init(&pmc->base);
+        if (ret)
+                return ret;
+        nv_wr32(pmc, 0x000140, 0x00000001);
+        return 0;
+}
+
+void
+_nouveau_mc_dtor(struct nouveau_object *object)
+{
+        struct nouveau_device *device = nv_device(object);
+        struct nouveau_mc *pmc = (void *)object;
+        free_irq(pmc->irq, pmc);
+        if (pmc->use_msi)
+                pci_disable_msi(device->pdev);
+        nouveau_subdev_destroy(&pmc->base);
+}
+
+int
+nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
+                   struct nouveau_oclass *bclass, int length, void **pobject)
+{
+        const struct nouveau_mc_oclass *oclass = (void *)bclass;
+        struct nouveau_device *device = nv_device(parent);
+        struct nouveau_mc *pmc;
+        int ret;
+
+        ret = nouveau_subdev_create_(parent, engine, bclass, 0, "PMC",
+                                     "master", length, pobject);
+        pmc = *pobject;
+        if (ret)
+                return ret;
+
+        pmc->unk260 = nouveau_mc_unk260;
+
+        if (nv_device_is_pci(device)) {
+                switch (device->pdev->device & 0x0ff0) {
+                case 0x00f0:
+                case 0x02e0:
+                        /* BR02? NFI how these would be handled yet exactly */
+                        break;
+                default:
+                        switch (device->chipset) {
+                        case 0xaa:
+                                /* reported broken, nv also disable it */
+                                break;
+                        default:
+                                pmc->use_msi = true;
+                                break;
+                        }
+                }
+
+                pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI",
+                                               pmc->use_msi);
+
+                if (pmc->use_msi && oclass->msi_rearm) {
+                        pmc->use_msi = pci_enable_msi(device->pdev) == 0;
+                        if (pmc->use_msi) {
+                                nv_info(pmc, "MSI interrupts enabled\n");
+                                oclass->msi_rearm(pmc);
+                        }
+                } else {
+                        pmc->use_msi = false;
+                }
+        }
+
+        ret = nv_device_get_irq(device, true);
+        if (ret < 0)
+                return ret;
+        pmc->irq = ret;
+
+        ret = request_irq(pmc->irq, nouveau_mc_intr, IRQF_SHARED, "nouveau",
+                          pmc);
+
+        if (ret < 0)
+                return ret;
+
+        return 0;
+}