diff options
Diffstat (limited to 'libdrm/nouveau/nouveau_dma.c')
| -rw-r--r-- | libdrm/nouveau/nouveau_dma.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/libdrm/nouveau/nouveau_dma.c b/libdrm/nouveau/nouveau_dma.c new file mode 100644 index 00000000..23da64b8 --- /dev/null +++ b/libdrm/nouveau/nouveau_dma.c @@ -0,0 +1,216 @@ +/* + * Copyright 2007 Nouveau Project + * + * 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 AUTHORS 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 <stdint.h> +#include <stdio.h> +#include <assert.h> +#include <errno.h> + +#include "nouveau_drmif.h" +#include "nouveau_dma.h" + +static inline uint32_t +READ_GET(struct nouveau_channel_priv *nvchan) +{ + return *nvchan->get; +} + +static inline void +WRITE_PUT(struct nouveau_channel_priv *nvchan, uint32_t val) +{ + uint32_t put = ((val << 2) + nvchan->dma->base); + volatile int dum; + + NOUVEAU_DMA_BARRIER; + dum = READ_GET(nvchan); + + *nvchan->put = put; + nvchan->dma->put = val; +#ifdef NOUVEAU_DMA_TRACE + printf("WRITE_PUT %d/0x%08x\n", nvchan->drm.channel, put); +#endif + + NOUVEAU_DMA_BARRIER; +} + +static inline int +LOCAL_GET(struct nouveau_dma_priv *dma, uint32_t *val) +{ + uint32_t get = *val; + + if (get >= dma->base && get <= (dma->base + (dma->max << 2))) { + *val = (get - dma->base) >> 2; + return 1; + } + + return 0; +} + +void +nouveau_dma_channel_init(struct nouveau_channel *chan) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(chan); + int i; + + nvchan->dma = &nvchan->struct_dma; + nvchan->dma->base = nvchan->drm.put_base; + nvchan->dma->cur = nvchan->dma->put = 0; + nvchan->dma->max = (nvchan->drm.cmdbuf_size >> 2) - 2; + nvchan->dma->free = nvchan->dma->max - nvchan->dma->cur; + + RING_SPACE_CH(chan, RING_SKIPS); + for (i = 0; i < RING_SKIPS; i++) + OUT_RING_CH(chan, 0); +} + +#define CHECK_TIMEOUT() do { \ + if ((NOUVEAU_TIME_MSEC() - t_start) > NOUVEAU_DMA_TIMEOUT) \ + return - EBUSY; \ +} while(0) + +int +nouveau_dma_wait(struct nouveau_channel *chan, unsigned size) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(chan); + struct nouveau_dma_priv *dma = nvchan->dma; + uint32_t get, t_start; + + FIRE_RING_CH(chan); + + t_start = NOUVEAU_TIME_MSEC(); + while (dma->free < size) { + CHECK_TIMEOUT(); + + get = READ_GET(nvchan); + if (!LOCAL_GET(dma, &get)) + continue; + + if (dma->put >= get) { + dma->free = dma->max - dma->cur; + + if (dma->free < size) { +#ifdef NOUVEAU_DMA_DEBUG + dma->push_free = 1; +#endif + OUT_RING_CH(chan, 0x20000000 | dma->base); + if (get <= RING_SKIPS) { + /*corner case - will be idle*/ + if (dma->put <= RING_SKIPS) + WRITE_PUT(nvchan, + RING_SKIPS + 1); + + do { + CHECK_TIMEOUT(); + get = READ_GET(nvchan); + if (!LOCAL_GET(dma, &get)) + get = 0; + } while (get <= RING_SKIPS); + } + + WRITE_PUT(nvchan, RING_SKIPS); + dma->cur = dma->put = RING_SKIPS; + dma->free = get - (RING_SKIPS + 1); + } + } else { + dma->free = get - dma->cur - 1; + } + } + + return 0; +} + +#ifdef NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF +static void +nouveau_dma_parse_pushbuf(struct nouveau_channel *chan, int get, int put) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(chan); + unsigned mthd_count = 0; + + while (get != put) { + uint32_t gpuget = (get << 2) + nvchan->drm.put_base; + uint32_t data; + + if (get < 0 || get >= nvchan->drm.cmdbuf_size) + assert(0); + data = nvchan->pushbuf[get++]; + + if (mthd_count) { + printf("0x%08x 0x%08x\n", gpuget, data); + mthd_count--; + continue; + } + + switch (data & 0x60000000) { + case 0x00000000: + mthd_count = (data >> 18) & 0x7ff; + printf("0x%08x 0x%08x MTHD " + "Sc %d Mthd 0x%04x Size %d\n", + gpuget, data, (data>>13) & 7, data & 0x1ffc, + mthd_count); + break; + case 0x20000000: + get = (data & 0x1ffffffc) >> 2; + printf("0x%08x 0x%08x JUMP 0x%08x\n", + gpuget, data, data & 0x1ffffffc); + continue; + case 0x40000000: + mthd_count = (data >> 18) & 0x7ff; + printf("0x%08x 0x%08x NINC " + "Sc %d Mthd 0x%04x Size %d\n", + gpuget, data, (data>>13) & 7, data & 0x1ffc, + mthd_count); + break; + case 0x60000000: + /* DMA_OPCODE_CALL apparently, doesn't seem to work on + * my NV40 at least.. + */ + /* fall-through */ + default: + printf("DMA_PUSHER 0x%08x 0x%08x\n", gpuget, data); + assert(0); + } + } +} +#endif + +void +nouveau_dma_kickoff(struct nouveau_channel *chan) +{ + struct nouveau_channel_priv *nvchan = nouveau_channel(chan); + struct nouveau_dma_priv *dma = nvchan->dma; + + if (dma->cur == dma->put) + return; + +#ifdef NOUVEAU_DMA_DEBUG + if (dma->push_free) { + printf("Packet incomplete: %d left\n", dma->push_free); + return; + } +#endif + +#ifdef NOUVEAU_DMA_DUMP_POSTRELOC_PUSHBUF + nouveau_dma_parse_pushbuf(chan, dma->put, dma->cur); +#endif + + WRITE_PUT(nvchan, dma->cur); +} |