| /* |
| * 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> |
| |
| void |
| nvkm_mc_unk260(struct nvkm_mc *mc, u32 data) |
| { |
| if (mc->func->unk260) |
| mc->func->unk260(mc, data); |
| } |
| |
| void |
| nvkm_mc_intr_unarm(struct nvkm_mc *mc) |
| { |
| return mc->func->intr_unarm(mc); |
| } |
| |
| void |
| nvkm_mc_intr_rearm(struct nvkm_mc *mc) |
| { |
| return mc->func->intr_rearm(mc); |
| } |
| |
| u32 |
| nvkm_mc_intr_mask(struct nvkm_mc *mc) |
| { |
| u32 intr = mc->func->intr_mask(mc); |
| if (WARN_ON_ONCE(intr == 0xffffffff)) |
| intr = 0; /* likely fallen off the bus */ |
| return intr; |
| } |
| |
| static irqreturn_t |
| nvkm_mc_intr(int irq, void *arg) |
| { |
| struct nvkm_mc *mc = arg; |
| struct nvkm_subdev *subdev = &mc->subdev; |
| struct nvkm_device *device = subdev->device; |
| const struct nvkm_mc_intr *map = mc->func->intr; |
| struct nvkm_subdev *unit; |
| u32 intr; |
| |
| nvkm_mc_intr_unarm(mc); |
| intr = nvkm_mc_intr_mask(mc); |
| if (mc->use_msi) |
| mc->func->msi_rearm(mc); |
| |
| if (intr) { |
| u32 stat = intr = nvkm_mc_intr_mask(mc); |
| while (map->stat) { |
| if (intr & map->stat) { |
| unit = nvkm_device_subdev(device, map->unit); |
| if (unit) |
| nvkm_subdev_intr(unit); |
| stat &= ~map->stat; |
| } |
| map++; |
| } |
| |
| if (stat) |
| nvkm_error(subdev, "unknown intr %08x\n", stat); |
| } |
| |
| nvkm_mc_intr_rearm(mc); |
| return intr ? IRQ_HANDLED : IRQ_NONE; |
| } |
| |
| static int |
| nvkm_mc_fini(struct nvkm_subdev *subdev, bool suspend) |
| { |
| struct nvkm_mc *mc = nvkm_mc(subdev); |
| nvkm_mc_intr_unarm(mc); |
| return 0; |
| } |
| |
| static int |
| nvkm_mc_oneinit(struct nvkm_subdev *subdev) |
| { |
| struct nvkm_mc *mc = nvkm_mc(subdev); |
| return request_irq(mc->irq, nvkm_mc_intr, IRQF_SHARED, "nvkm", mc); |
| } |
| |
| static int |
| nvkm_mc_init(struct nvkm_subdev *subdev) |
| { |
| struct nvkm_mc *mc = nvkm_mc(subdev); |
| if (mc->func->init) |
| mc->func->init(mc); |
| nvkm_mc_intr_rearm(mc); |
| return 0; |
| } |
| |
| static void * |
| nvkm_mc_dtor(struct nvkm_subdev *subdev) |
| { |
| struct nvkm_mc *mc = nvkm_mc(subdev); |
| struct nvkm_device *device = mc->subdev.device; |
| free_irq(mc->irq, mc); |
| if (mc->use_msi) |
| pci_disable_msi(device->pdev); |
| return mc; |
| } |
| |
| static const struct nvkm_subdev_func |
| nvkm_mc = { |
| .dtor = nvkm_mc_dtor, |
| .oneinit = nvkm_mc_oneinit, |
| .init = nvkm_mc_init, |
| .fini = nvkm_mc_fini, |
| }; |
| |
| int |
| nvkm_mc_new_(const struct nvkm_mc_func *func, struct nvkm_device *device, |
| int index, struct nvkm_mc **pmc) |
| { |
| struct nvkm_mc *mc; |
| int ret; |
| |
| if (!(mc = *pmc = kzalloc(sizeof(*mc), GFP_KERNEL))) |
| return -ENOMEM; |
| |
| nvkm_subdev_ctor(&nvkm_mc, device, index, 0, &mc->subdev); |
| mc->func = func; |
| |
| 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: |
| mc->use_msi = true; |
| break; |
| } |
| } |
| |
| mc->use_msi = nvkm_boolopt(device->cfgopt, "NvMSI", |
| mc->use_msi); |
| |
| if (mc->use_msi && mc->func->msi_rearm) { |
| mc->use_msi = pci_enable_msi(device->pdev) == 0; |
| if (mc->use_msi) { |
| nvkm_debug(&mc->subdev, "MSI enabled\n"); |
| mc->func->msi_rearm(mc); |
| } |
| } else { |
| mc->use_msi = false; |
| } |
| } |
| |
| ret = nv_device_get_irq(device, true); |
| if (ret < 0) |
| return ret; |
| mc->irq = ret; |
| return 0; |
| } |