| /* |
| * 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 <subdev/mc.h> |
| #include <core/option.h> |
| |
| 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(device->pdev->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; |
| |
| 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: break; /* reported broken, nv also disable it */ |
| 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 = request_irq(device->pdev->irq, nouveau_mc_intr, |
| IRQF_SHARED, "nouveau", pmc); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |