diff options
Diffstat (limited to 'src/gallium/drivers/ilo/ilo_transfer.c')
| -rw-r--r-- | src/gallium/drivers/ilo/ilo_transfer.c | 473 |
1 files changed, 473 insertions, 0 deletions
diff --git a/src/gallium/drivers/ilo/ilo_transfer.c b/src/gallium/drivers/ilo/ilo_transfer.c new file mode 100644 index 00000000000..3b9c4d6994f --- /dev/null +++ b/src/gallium/drivers/ilo/ilo_transfer.c @@ -0,0 +1,473 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2012-2013 LunarG, 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 AUTHORS OR COPYRIGHT HOLDERS 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: + * Chia-I Wu <olv@lunarg.com> + */ + +#include "util/u_surface.h" +#include "util/u_transfer.h" +#include "util/u_format_etc.h" + +#include "ilo_cp.h" +#include "ilo_context.h" +#include "ilo_resource.h" +#include "ilo_transfer.h" + +enum ilo_transfer_map_method { + ILO_TRANSFER_MAP_DIRECT, + ILO_TRANSFER_MAP_STAGING_SYS, +}; + +struct ilo_transfer { + struct pipe_transfer base; + + enum ilo_transfer_map_method method; + void *ptr; + + void *staging_sys; +}; + +static inline struct ilo_transfer * +ilo_transfer(struct pipe_transfer *transfer) +{ + return (struct ilo_transfer *) transfer; +} + +static void +ilo_transfer_inline_write(struct pipe_context *pipe, + struct pipe_resource *r, + unsigned level, + unsigned usage, + const struct pipe_box *box, + const void *data, + unsigned stride, + unsigned layer_stride) +{ + struct ilo_context *ilo = ilo_context(pipe); + struct ilo_resource *res = ilo_resource(r); + int offset, size; + bool will_be_busy; + + /* + * Fall back to map(), memcpy(), and unmap(). We use this path for + * unsynchronized write, as the buffer is likely to be busy and pwrite() + * will stall. + */ + if (unlikely(res->base.target != PIPE_BUFFER) || + (usage & PIPE_TRANSFER_UNSYNCHRONIZED)) { + u_default_transfer_inline_write(pipe, r, + level, usage, box, data, stride, layer_stride); + + return; + } + + /* + * XXX With hardware context support, the bo may be needed by GPU without + * being referenced by ilo->cp->bo. We have to flush unconditionally, and + * that is bad. + */ + if (ilo->cp->hw_ctx) + ilo_cp_flush(ilo->cp); + + will_be_busy = ilo->cp->bo->references(ilo->cp->bo, res->bo); + + /* see if we can avoid stalling */ + if (will_be_busy || intel_bo_is_busy(res->bo)) { + bool will_stall = true; + + if (usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) { + /* old data not needed so discard the old bo to avoid stalling */ + if (ilo_resource_alloc_bo(res)) + will_stall = false; + } + else { + /* + * We could allocate a temporary bo to hold the data and emit + * pipelined copy blit to move them to res->bo. But for now, do + * nothing. + */ + } + + /* flush to make bo busy (so that pwrite() stalls as it should be) */ + if (will_stall && will_be_busy) + ilo_cp_flush(ilo->cp); + } + + /* for PIPE_BUFFERs, conversion should not be needed */ + assert(res->bo_format == res->base.format); + + /* they should specify just an offset and a size */ + assert(level == 0); + assert(box->y == 0); + assert(box->z == 0); + assert(box->height == 1); + assert(box->depth == 1); + offset = box->x; + size = box->width; + + res->bo->pwrite(res->bo, offset, size, data); +} + +static void +transfer_unmap_sys_convert(enum pipe_format dst_fmt, + const struct pipe_transfer *dst_xfer, + void *dst, + enum pipe_format src_fmt, + const struct pipe_transfer *src_xfer, + const void *src) +{ + int i; + + switch (src_fmt) { + case PIPE_FORMAT_ETC1_RGB8: + assert(dst_fmt == PIPE_FORMAT_R8G8B8X8_UNORM); + + for (i = 0; i < dst_xfer->box.depth; i++) { + util_format_etc1_rgb8_unpack_rgba_8unorm(dst, + dst_xfer->stride, src, src_xfer->stride, + dst_xfer->box.width, dst_xfer->box.height); + + dst += dst_xfer->layer_stride; + src += src_xfer->layer_stride; + } + break; + default: + assert(!"unable to convert the staging data"); + break; + } +} + +static void +transfer_unmap_sys(struct ilo_context *ilo, + struct ilo_resource *res, + struct ilo_transfer *xfer) +{ + const void *src = xfer->ptr; + struct pipe_transfer *dst_xfer; + void *dst; + + dst = ilo->base.transfer_map(&ilo->base, + xfer->base.resource, xfer->base.level, + PIPE_TRANSFER_WRITE | + PIPE_TRANSFER_MAP_DIRECTLY | + PIPE_TRANSFER_DISCARD_RANGE, + &xfer->base.box, &dst_xfer); + if (!dst_xfer) { + ilo_err("failed to map resource for moving staging data\n"); + FREE(xfer->staging_sys); + return; + } + + if (likely(res->bo_format != res->base.format)) { + transfer_unmap_sys_convert(res->bo_format, dst_xfer, dst, + res->base.format, &xfer->base, src); + } + else { + util_copy_box(dst, res->bo_format, + dst_xfer->stride, dst_xfer->layer_stride, 0, 0, 0, + dst_xfer->box.width, dst_xfer->box.height, dst_xfer->box.depth, + src, xfer->base.stride, xfer->base.layer_stride, 0, 0, 0); + } + + ilo->base.transfer_unmap(&ilo->base, dst_xfer); + FREE(xfer->staging_sys); +} + +static bool +transfer_map_sys(struct ilo_context *ilo, + struct ilo_resource *res, + struct ilo_transfer *xfer) +{ + const struct pipe_box *box = &xfer->base.box; + const size_t stride = util_format_get_stride(res->base.format, box->width); + const size_t size = + util_format_get_2d_size(res->base.format, stride, box->height); + bool read_back = false; + + if (xfer->base.usage & PIPE_TRANSFER_READ) { + read_back = true; + } + else if (xfer->base.usage & PIPE_TRANSFER_WRITE) { + const unsigned discard_flags = + (PIPE_TRANSFER_DISCARD_RANGE | PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE); + + if (!(xfer->base.usage & discard_flags)) + read_back = true; + } + + /* TODO */ + if (read_back) + return false; + + xfer->staging_sys = MALLOC(size * box->depth); + if (!xfer->staging_sys) + return false; + + xfer->base.stride = stride; + xfer->base.layer_stride = size; + xfer->ptr = xfer->staging_sys; + + return true; +} + +static void +transfer_unmap_direct(struct ilo_context *ilo, + struct ilo_resource *res, + struct ilo_transfer *xfer) +{ + res->bo->unmap(res->bo); +} + +static bool +transfer_map_direct(struct ilo_context *ilo, + struct ilo_resource *res, + struct ilo_transfer *xfer) +{ + int x, y, err; + + if (xfer->base.usage & PIPE_TRANSFER_UNSYNCHRONIZED) + err = res->bo->map_unsynchronized(res->bo); + /* prefer map() when there is the last-level cache */ + else if (res->tiling == INTEL_TILING_NONE && + (ilo->dev->has_llc || (xfer->base.usage & PIPE_TRANSFER_READ))) + err = res->bo->map(res->bo, (xfer->base.usage & PIPE_TRANSFER_WRITE)); + else + err = res->bo->map_gtt(res->bo); + + if (err) + return false; + + /* note that stride is for a block row, not a texel row */ + xfer->base.stride = res->bo_stride; + + /* + * we can walk through layers when the resource is a texture array or + * when this is the first level of a 3D texture being mapped + */ + if (res->base.array_size > 1 || + (res->base.target == PIPE_TEXTURE_3D && xfer->base.level == 0)) { + const unsigned qpitch = res->slice_offsets[xfer->base.level][1].y - + res->slice_offsets[xfer->base.level][0].y; + + assert(qpitch % res->block_height == 0); + xfer->base.layer_stride = (qpitch / res->block_height) * xfer->base.stride; + } + else { + xfer->base.layer_stride = 0; + } + + x = res->slice_offsets[xfer->base.level][xfer->base.box.z].x; + y = res->slice_offsets[xfer->base.level][xfer->base.box.z].y; + + x += xfer->base.box.x; + y += xfer->base.box.y; + + /* in blocks */ + assert(x % res->block_width == 0 && y % res->block_height == 0); + x /= res->block_width; + y /= res->block_height; + + xfer->ptr = res->bo->get_virtual(res->bo); + xfer->ptr += y * res->bo_stride + x * res->bo_cpp; + + return true; +} + +/** + * Choose the best mapping method, depending on the transfer usage and whether + * the bo is busy. + */ +static bool +transfer_map_choose_method(struct ilo_context *ilo, + struct ilo_resource *res, + struct ilo_transfer *xfer) +{ + bool will_be_busy, will_stall; + + /* need to convert on-the-fly */ + if (res->bo_format != res->base.format && + !(xfer->base.usage & PIPE_TRANSFER_MAP_DIRECTLY)) { + xfer->method = ILO_TRANSFER_MAP_STAGING_SYS; + + return true; + } + + xfer->method = ILO_TRANSFER_MAP_DIRECT; + + /* unsynchronized map does not stall */ + if (xfer->base.usage & PIPE_TRANSFER_UNSYNCHRONIZED) + return true; + + will_be_busy = ilo->cp->bo->references(ilo->cp->bo, res->bo); + if (!will_be_busy) { + /* + * XXX With hardware context support, the bo may be needed by GPU + * without being referenced by ilo->cp->bo. We have to flush + * unconditionally, and that is bad. + */ + if (ilo->cp->hw_ctx) + ilo_cp_flush(ilo->cp); + + if (!intel_bo_is_busy(res->bo)) + return true; + } + + /* bo is busy and mapping it will stall */ + will_stall = true; + + if (xfer->base.usage & PIPE_TRANSFER_MAP_DIRECTLY) { + /* nothing we can do */ + } + else if (xfer->base.usage & PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE) { + /* discard old bo and allocate a new one for mapping */ + if (ilo_resource_alloc_bo(res)) + will_stall = false; + } + else if (xfer->base.usage & PIPE_TRANSFER_FLUSH_EXPLICIT) { + /* + * We could allocate and return a system buffer here. When a region of + * the buffer is explicitly flushed, we pwrite() the region to a + * temporary bo and emit pipelined copy blit. + * + * For now, do nothing. + */ + } + else if (xfer->base.usage & PIPE_TRANSFER_DISCARD_RANGE) { + /* + * We could allocate a temporary bo for mapping, and emit pipelined copy + * blit upon unmapping. + * + * For now, do nothing. + */ + } + + if (will_stall) { + if (xfer->base.usage & PIPE_TRANSFER_DONTBLOCK) + return false; + + /* flush to make bo busy (so that map() stalls as it should be) */ + if (will_be_busy) + ilo_cp_flush(ilo->cp); + } + + return true; +} + +static void +ilo_transfer_flush_region(struct pipe_context *pipe, + struct pipe_transfer *transfer, + const struct pipe_box *box) +{ +} + +static void +ilo_transfer_unmap(struct pipe_context *pipe, + struct pipe_transfer *transfer) +{ + struct ilo_context *ilo = ilo_context(pipe); + struct ilo_resource *res = ilo_resource(transfer->resource); + struct ilo_transfer *xfer = ilo_transfer(transfer); + + switch (xfer->method) { + case ILO_TRANSFER_MAP_DIRECT: + transfer_unmap_direct(ilo, res, xfer); + break; + case ILO_TRANSFER_MAP_STAGING_SYS: + transfer_unmap_sys(ilo, res, xfer); + break; + default: + assert(!"unknown mapping method"); + break; + } + + pipe_resource_reference(&xfer->base.resource, NULL); + FREE(xfer); +} + +static void * +ilo_transfer_map(struct pipe_context *pipe, + struct pipe_resource *r, + unsigned level, + unsigned usage, + const struct pipe_box *box, + struct pipe_transfer **transfer) +{ + struct ilo_context *ilo = ilo_context(pipe); + struct ilo_resource *res = ilo_resource(r); + struct ilo_transfer *xfer; + int ok; + + xfer = MALLOC_STRUCT(ilo_transfer); + if (!xfer) { + *transfer = NULL; + return NULL; + } + + xfer->base.resource = NULL; + pipe_resource_reference(&xfer->base.resource, &res->base); + xfer->base.level = level; + xfer->base.usage = usage; + xfer->base.box = *box; + + ok = transfer_map_choose_method(ilo, res, xfer); + if (ok) { + switch (xfer->method) { + case ILO_TRANSFER_MAP_DIRECT: + ok = transfer_map_direct(ilo, res, xfer); + break; + case ILO_TRANSFER_MAP_STAGING_SYS: + ok = transfer_map_sys(ilo, res, xfer); + break; + default: + assert(!"unknown mapping method"); + ok = false; + break; + } + } + + if (!ok) { + pipe_resource_reference(&xfer->base.resource, NULL); + FREE(xfer); + + *transfer = NULL; + + return NULL; + } + + *transfer = &xfer->base; + + return xfer->ptr; +} + +/** + * Initialize transfer-related functions. + */ +void +ilo_init_transfer_functions(struct ilo_context *ilo) +{ + ilo->base.transfer_map = ilo_transfer_map; + ilo->base.transfer_flush_region = ilo_transfer_flush_region; + ilo->base.transfer_unmap = ilo_transfer_unmap; + ilo->base.transfer_inline_write = ilo_transfer_inline_write; +} |