2 * Copyright 2012 Red Hat Inc.
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9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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25 #include <subdev/mc.h>
26 #include <core/option.h>
29 nouveau_mc_intr(int irq, void *arg)
31 struct nouveau_mc *pmc = arg;
32 const struct nouveau_mc_oclass *oclass = (void *)nv_object(pmc)->oclass;
33 const struct nouveau_mc_intr *map = oclass->intr;
34 struct nouveau_device *device = nv_device(pmc);
35 struct nouveau_subdev *unit;
38 nv_wr32(pmc, 0x000140, 0x00000000);
39 nv_rd32(pmc, 0x000140);
41 intr = nv_rd32(pmc, 0x000100);
42 if (intr == 0xffffffff) /* likely fallen off the bus */
45 if (pmc->use_msi && oclass->msi_rearm)
46 oclass->msi_rearm(pmc);
49 u32 stat = nv_rd32(pmc, 0x000100);
51 if (intr & map->stat) {
52 unit = nouveau_subdev(pmc, map->unit);
53 if (unit && unit->intr)
61 nv_error(pmc, "unknown intr 0x%08x\n", stat);
64 nv_wr32(pmc, 0x000140, 0x00000001);
65 return intr ? IRQ_HANDLED : IRQ_NONE;
69 _nouveau_mc_fini(struct nouveau_object *object, bool suspend)
71 struct nouveau_mc *pmc = (void *)object;
72 nv_wr32(pmc, 0x000140, 0x00000000);
73 return nouveau_subdev_fini(&pmc->base, suspend);
77 _nouveau_mc_init(struct nouveau_object *object)
79 struct nouveau_mc *pmc = (void *)object;
80 int ret = nouveau_subdev_init(&pmc->base);
83 nv_wr32(pmc, 0x000140, 0x00000001);
88 _nouveau_mc_dtor(struct nouveau_object *object)
90 struct nouveau_device *device = nv_device(object);
91 struct nouveau_mc *pmc = (void *)object;
92 free_irq(device->pdev->irq, pmc);
94 pci_disable_msi(device->pdev);
95 nouveau_subdev_destroy(&pmc->base);
99 nouveau_mc_create_(struct nouveau_object *parent, struct nouveau_object *engine,
100 struct nouveau_oclass *bclass, int length, void **pobject)
102 const struct nouveau_mc_oclass *oclass = (void *)bclass;
103 struct nouveau_device *device = nv_device(parent);
104 struct nouveau_mc *pmc;
107 ret = nouveau_subdev_create_(parent, engine, bclass, 0, "PMC",
108 "master", length, pobject);
113 switch (device->pdev->device & 0x0ff0) {
114 case 0x00f0: /* BR02? */
115 case 0x02e0: /* BR02? */
116 pmc->use_msi = false;
119 pmc->use_msi = nouveau_boolopt(device->cfgopt, "NvMSI", true);
121 pmc->use_msi = pci_enable_msi(device->pdev) == 0;
123 nv_info(pmc, "MSI interrupts enabled\n");
124 oclass->msi_rearm(pmc);
130 ret = request_irq(device->pdev->irq, nouveau_mc_intr,
131 IRQF_SHARED, "nouveau", pmc);