cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/core/ramht.c

/*
 * 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.
 */
#include <core/ramht.h>
#include <core/engine.h>


static u32 nvkm_ramht_hash(struct nvkm_ramht *ramht, int chid, u32 handle) { u32 hash = 0; while (handle) { hash ^= (handle & ((1 << ramht->bits) - 1)); handle >>= ramht->bits; } hash ^= chid << (ramht->bits - 4); return hash; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs67100.00%6100.00%
Total67100.00%6100.00%


struct nvkm_gpuobj * nvkm_ramht_search(struct nvkm_ramht *ramht, int chid, u32 handle) { u32 co, ho; co = ho = nvkm_ramht_hash(ramht, chid, handle); do { if (ramht->data[co].chid == chid) { if (ramht->data[co].handle == handle) return ramht->data[co].inst; } if (++co >= ramht->size) co = 0; } while (co != ho); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs100100.00%3100.00%
Total100100.00%3100.00%


static int nvkm_ramht_update(struct nvkm_ramht *ramht, int co, struct nvkm_object *object, int chid, int addr, u32 handle, u32 context) { struct nvkm_ramht_data *data = &ramht->data[co]; u64 inst = 0x00000040; /* just non-zero for <=g8x fifo ramht */ int ret; nvkm_gpuobj_del(&data->inst); data->chid = chid; data->handle = handle; if (object) { ret = nvkm_object_bind(object, ramht->parent, 16, &data->inst); if (ret) { if (ret != -ENODEV) { data->chid = -1; return ret; } data->inst = NULL; } if (data->inst) { if (ramht->device->card_type >= NV_50) inst = data->inst->node->offset; else inst = data->inst->addr; } if (addr < 0) context |= inst << -addr; else context |= inst >> addr; } nvkm_kmap(ramht->gpuobj); nvkm_wo32(ramht->gpuobj, (co << 3) + 0, handle); nvkm_wo32(ramht->gpuobj, (co << 3) + 4, context); nvkm_done(ramht->gpuobj); return co + 1; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs238100.00%7100.00%
Total238100.00%7100.00%


void nvkm_ramht_remove(struct nvkm_ramht *ramht, int cookie) { if (--cookie >= 0) nvkm_ramht_update(ramht, cookie, NULL, -1, 0, 0, 0); }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs38100.00%1100.00%
Total38100.00%1100.00%


int nvkm_ramht_insert(struct nvkm_ramht *ramht, struct nvkm_object *object, int chid, int addr, u32 handle, u32 context) { u32 co, ho; if (nvkm_ramht_search(ramht, chid, handle)) return -EEXIST; co = ho = nvkm_ramht_hash(ramht, chid, handle); do { if (ramht->data[co].chid < 0) { return nvkm_ramht_update(ramht, co, object, chid, addr, handle, context); } if (++co >= ramht->size) co = 0; } while (co != ho); return -ENOSPC; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs120100.00%5100.00%
Total120100.00%5100.00%


void nvkm_ramht_del(struct nvkm_ramht **pramht) { struct nvkm_ramht *ramht = *pramht; if (ramht) { nvkm_gpuobj_del(&ramht->gpuobj); vfree(*pramht); *pramht = NULL; } }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs3579.55%466.67%
Francisco Jerez818.18%116.67%
Ilia Mirkin12.27%116.67%
Total44100.00%6100.00%


int nvkm_ramht_new(struct nvkm_device *device, u32 size, u32 align, struct nvkm_gpuobj *parent, struct nvkm_ramht **pramht) { struct nvkm_ramht *ramht; int ret, i; if (!(ramht = *pramht = vzalloc(sizeof(*ramht) + (size >> 3) * sizeof(*ramht->data)))) return -ENOMEM; ramht->device = device; ramht->parent = parent; ramht->size = size >> 3; ramht->bits = order_base_2(ramht->size); for (i = 0; i < ramht->size; i++) ramht->data[i].chid = -1; ret = nvkm_gpuobj_new(ramht->device, size, align, true, ramht->parent, &ramht->gpuobj); if (ret) nvkm_ramht_del(pramht); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs16799.40%787.50%
Ilia Mirkin10.60%112.50%
Total168100.00%8100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Ben Skeggs77298.72%1184.62%
Francisco Jerez81.02%17.69%
Ilia Mirkin20.26%17.69%
Total782100.00%13100.00%
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