cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/nouveau/nvkm/engine/fifo/nv04.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.
 *
 * Authors: Ben Skeggs
 */
#include "nv04.h"
#include "channv04.h"
#include "regsnv04.h"

#include <core/client.h>
#include <core/ramht.h>
#include <subdev/instmem.h>
#include <subdev/timer.h>
#include <engine/sw.h>

static const struct nv04_fifo_ramfc

nv04_fifo_ramfc[] = {
	{ 32,  0, 0x00,  0, NV04_PFIFO_CACHE1_DMA_PUT },
	{ 32,  0, 0x04,  0, NV04_PFIFO_CACHE1_DMA_GET },
	{ 16,  0, 0x08,  0, NV04_PFIFO_CACHE1_DMA_INSTANCE },
	{ 16, 16, 0x08,  0, NV04_PFIFO_CACHE1_DMA_DCOUNT },
	{ 32,  0, 0x0c,  0, NV04_PFIFO_CACHE1_DMA_STATE },
	{ 32,  0, 0x10,  0, NV04_PFIFO_CACHE1_DMA_FETCH },
	{ 32,  0, 0x14,  0, NV04_PFIFO_CACHE1_ENGINE },
	{ 32,  0, 0x18,  0, NV04_PFIFO_CACHE1_PULL1 },
	{}
};


void nv04_fifo_pause(struct nvkm_fifo *base, unsigned long *pflags) __acquires(fifo->base.lock) { struct nv04_fifo *fifo = nv04_fifo(base); struct nvkm_device *device = fifo->base.engine.subdev.device; unsigned long flags; spin_lock_irqsave(&fifo->base.lock, flags); *pflags = flags; nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000000); nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000000); /* in some cases the puller may be left in an inconsistent state * if you try to stop it while it's busy translating handles. * sometimes you get a CACHE_ERROR, sometimes it just fails * silently; sending incorrect instance offsets to PGRAPH after * it's started up again. * * to avoid this, we invalidate the most recently calculated * instance. */ nvkm_msec(device, 2000, u32 tmp = nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0); if (!(tmp & NV04_PFIFO_CACHE1_PULL0_HASH_BUSY)) break; ); if (nvkm_rd32(device, NV04_PFIFO_CACHE1_PULL0) & NV04_PFIFO_CACHE1_PULL0_HASH_FAILED) nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR); nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0x00000000); }

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void nv04_fifo_start(struct nvkm_fifo *base, unsigned long *pflags) __releases(fifo->base.lock) { struct nv04_fifo *fifo = nv04_fifo(base); struct nvkm_device *device = fifo->base.engine.subdev.device; unsigned long flags = *pflags; nvkm_mask(device, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0x00000001); nvkm_wr32(device, NV03_PFIFO_CACHES, 0x00000001); spin_unlock_irqrestore(&fifo->base.lock, flags); }

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static const char * nv_dma_state_err(u32 state) { static const char * const desc[] = { "NONE", "CALL_SUBR_ACTIVE", "INVALID_MTHD", "RET_SUBR_INACTIVE", "INVALID_CMD", "IB_EMPTY"/* NV50+ */, "MEM_FAULT", "UNK" }; return desc[(state >> 29) & 0x7]; }

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static bool nv04_fifo_swmthd(struct nvkm_device *device, u32 chid, u32 addr, u32 data) { struct nvkm_sw *sw = device->sw; const int subc = (addr & 0x0000e000) >> 13; const int mthd = (addr & 0x00001ffc); const u32 mask = 0x0000000f << (subc * 4); u32 engine = nvkm_rd32(device, 0x003280); bool handled = false; switch (mthd) { case 0x0000 ... 0x0000: /* subchannel's engine -> software */ nvkm_wr32(device, 0x003280, (engine &= ~mask)); case 0x0180 ... 0x01fc: /* handle -> instance */ data = nvkm_rd32(device, 0x003258) & 0x0000ffff; case 0x0100 ... 0x017c: case 0x0200 ... 0x1ffc: /* pass method down to sw */ if (!(engine & mask) && sw) handled = nvkm_sw_mthd(sw, chid, subc, mthd, data); break; default: break; } return handled; }

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Total164100.00%5100.00%


static void nv04_fifo_cache_error(struct nv04_fifo *fifo, u32 chid, u32 get) { struct nvkm_subdev *subdev = &fifo->base.engine.subdev; struct nvkm_device *device = subdev->device; struct nvkm_fifo_chan *chan; unsigned long flags; u32 pull0 = nvkm_rd32(device, 0x003250); u32 mthd, data; int ptr; /* NV_PFIFO_CACHE1_GET actually goes to 0xffc before wrapping on my * G80 chips, but CACHE1 isn't big enough for this much data.. Tests * show that it wraps around to the start at GET=0x800.. No clue as to * why.. */ ptr = (get & 0x7ff) >> 2; if (device->card_type < NV_40) { mthd = nvkm_rd32(device, NV04_PFIFO_CACHE1_METHOD(ptr)); data = nvkm_rd32(device, NV04_PFIFO_CACHE1_DATA(ptr)); } else { mthd = nvkm_rd32(device, NV40_PFIFO_CACHE1_METHOD(ptr)); data = nvkm_rd32(device, NV40_PFIFO_CACHE1_DATA(ptr)); } if (!(pull0 & 0x00000100) || !nv04_fifo_swmthd(device, chid, mthd, data)) { chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags); nvkm_error(subdev, "CACHE_ERROR - " "ch %d [%s] subc %d mthd %04x data %08x\n", chid, chan ? chan->object.client->name : "unknown", (mthd >> 13) & 7, mthd & 0x1ffc, data); nvkm_fifo_chan_put(&fifo->base, flags, &chan); } nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH, 0); nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_CACHE_ERROR); nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) & ~1); nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4); nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH0) | 1); nvkm_wr32(device, NV04_PFIFO_CACHE1_HASH, 0); nvkm_wr32(device, NV04_PFIFO_CACHE1_DMA_PUSH, nvkm_rd32(device, NV04_PFIFO_CACHE1_DMA_PUSH) | 1); nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1); }

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Marcin Ślusarz175.28%222.22%
Total322100.00%9100.00%


static void nv04_fifo_dma_pusher(struct nv04_fifo *fifo, u32 chid) { struct nvkm_subdev *subdev = &fifo->base.engine.subdev; struct nvkm_device *device = subdev->device; u32 dma_get = nvkm_rd32(device, 0x003244); u32 dma_put = nvkm_rd32(device, 0x003240); u32 push = nvkm_rd32(device, 0x003220); u32 state = nvkm_rd32(device, 0x003228); struct nvkm_fifo_chan *chan; unsigned long flags; const char *name; chan = nvkm_fifo_chan_chid(&fifo->base, chid, &flags); name = chan ? chan->object.client->name : "unknown"; if (device->card_type == NV_50) { u32 ho_get = nvkm_rd32(device, 0x003328); u32 ho_put = nvkm_rd32(device, 0x003320); u32 ib_get = nvkm_rd32(device, 0x003334); u32 ib_put = nvkm_rd32(device, 0x003330); nvkm_error(subdev, "DMA_PUSHER - " "ch %d [%s] get %02x%08x put %02x%08x ib_get %08x " "ib_put %08x state %08x (err: %s) push %08x\n", chid, name, ho_get, dma_get, ho_put, dma_put, ib_get, ib_put, state, nv_dma_state_err(state), push); /* METHOD_COUNT, in DMA_STATE on earlier chipsets */ nvkm_wr32(device, 0x003364, 0x00000000); if (dma_get != dma_put || ho_get != ho_put) { nvkm_wr32(device, 0x003244, dma_put); nvkm_wr32(device, 0x003328, ho_put); } else if (ib_get != ib_put) nvkm_wr32(device, 0x003334, ib_put); } else { nvkm_error(subdev, "DMA_PUSHER - ch %d [%s] get %08x put %08x " "state %08x (err: %s) push %08x\n", chid, name, dma_get, dma_put, state, nv_dma_state_err(state), push); if (dma_get != dma_put) nvkm_wr32(device, 0x003244, dma_put); } nvkm_fifo_chan_put(&fifo->base, flags, &chan); nvkm_wr32(device, 0x003228, 0x00000000); nvkm_wr32(device, 0x003220, 0x00000001); nvkm_wr32(device, 0x002100, NV_PFIFO_INTR_DMA_PUSHER); }

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Ben Skeggs30889.80%666.67%
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void nv04_fifo_intr(struct nvkm_fifo *base) { struct nv04_fifo *fifo = nv04_fifo(base); struct nvkm_subdev *subdev = &fifo->base.engine.subdev; struct nvkm_device *device = subdev->device; u32 mask = nvkm_rd32(device, NV03_PFIFO_INTR_EN_0); u32 stat = nvkm_rd32(device, NV03_PFIFO_INTR_0) & mask; u32 reassign, chid, get, sem; reassign = nvkm_rd32(device, NV03_PFIFO_CACHES) & 1; nvkm_wr32(device, NV03_PFIFO_CACHES, 0); chid = nvkm_rd32(device, NV03_PFIFO_CACHE1_PUSH1) & (fifo->base.nr - 1); get = nvkm_rd32(device, NV03_PFIFO_CACHE1_GET); if (stat & NV_PFIFO_INTR_CACHE_ERROR) { nv04_fifo_cache_error(fifo, chid, get); stat &= ~NV_PFIFO_INTR_CACHE_ERROR; } if (stat & NV_PFIFO_INTR_DMA_PUSHER) { nv04_fifo_dma_pusher(fifo, chid); stat &= ~NV_PFIFO_INTR_DMA_PUSHER; } if (stat & NV_PFIFO_INTR_SEMAPHORE) { stat &= ~NV_PFIFO_INTR_SEMAPHORE; nvkm_wr32(device, NV03_PFIFO_INTR_0, NV_PFIFO_INTR_SEMAPHORE); sem = nvkm_rd32(device, NV10_PFIFO_CACHE1_SEMAPHORE); nvkm_wr32(device, NV10_PFIFO_CACHE1_SEMAPHORE, sem | 0x1); nvkm_wr32(device, NV03_PFIFO_CACHE1_GET, get + 4); nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1); } if (device->card_type == NV_50) { if (stat & 0x00000010) { stat &= ~0x00000010; nvkm_wr32(device, 0x002100, 0x00000010); } if (stat & 0x40000000) { nvkm_wr32(device, 0x002100, 0x40000000); nvkm_fifo_uevent(&fifo->base); stat &= ~0x40000000; } } if (stat) { nvkm_warn(subdev, "intr %08x\n", stat); nvkm_mask(device, NV03_PFIFO_INTR_EN_0, stat, 0x00000000); nvkm_wr32(device, NV03_PFIFO_INTR_0, stat); } nvkm_wr32(device, NV03_PFIFO_CACHES, reassign); }

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void nv04_fifo_init(struct nvkm_fifo *base) { struct nv04_fifo *fifo = nv04_fifo(base); struct nvkm_device *device = fifo->base.engine.subdev.device; struct nvkm_instmem *imem = device->imem; struct nvkm_ramht *ramht = imem->ramht; struct nvkm_memory *ramro = imem->ramro; struct nvkm_memory *ramfc = imem->ramfc; nvkm_wr32(device, NV04_PFIFO_DELAY_0, 0x000000ff); nvkm_wr32(device, NV04_PFIFO_DMA_TIMESLICE, 0x0101ffff); nvkm_wr32(device, NV03_PFIFO_RAMHT, (0x03 << 24) /* search 128 */ | ((ramht->bits - 9) << 16) | (ramht->gpuobj->addr >> 8)); nvkm_wr32(device, NV03_PFIFO_RAMRO, nvkm_memory_addr(ramro) >> 8); nvkm_wr32(device, NV03_PFIFO_RAMFC, nvkm_memory_addr(ramfc) >> 8); nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH1, fifo->base.nr - 1); nvkm_wr32(device, NV03_PFIFO_INTR_0, 0xffffffff); nvkm_wr32(device, NV03_PFIFO_INTR_EN_0, 0xffffffff); nvkm_wr32(device, NV03_PFIFO_CACHE1_PUSH0, 1); nvkm_wr32(device, NV04_PFIFO_CACHE1_PULL0, 1); nvkm_wr32(device, NV03_PFIFO_CACHES, 1); }

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int nv04_fifo_new_(const struct nvkm_fifo_func *func, struct nvkm_device *device, int index, int nr, const struct nv04_fifo_ramfc *ramfc, struct nvkm_fifo **pfifo) { struct nv04_fifo *fifo; int ret; if (!(fifo = kzalloc(sizeof(*fifo), GFP_KERNEL))) return -ENOMEM; fifo->ramfc = ramfc; *pfifo = &fifo->base; ret = nvkm_fifo_ctor(func, device, index, nr, &fifo->base); if (ret) return ret; set_bit(nr - 1, fifo->base.mask); /* inactive channel */ return 0; }

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static const struct nvkm_fifo_func nv04_fifo = { .init = nv04_fifo_init, .intr = nv04_fifo_intr, .pause = nv04_fifo_pause, .start = nv04_fifo_start, .chan = { &nv04_fifo_dma_oclass, NULL }, };
int nv04_fifo_new(struct nvkm_device *device, int index, struct nvkm_fifo **pfifo) { return nv04_fifo_new_(&nv04_fifo, device, index, 16, nv04_fifo_ramfc, pfifo); }

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Total1965100.00%30100.00%
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