blob: d38b914d1206944ab5f8bee1f79e1ccc1b38128c [file] [log] [blame]
// SPDX-License-Identifier: MIT
/*
* Copyright © 2019 Intel Corporation
*/
#include "gen7_renderclear.h"
#include "i915_drv.h"
#include "intel_gpu_commands.h"
#include "intel_gt_regs.h"
#define GT3_INLINE_DATA_DELAYS 0x1E00
#define batch_advance(Y, CS) GEM_BUG_ON((Y)->end != (CS))
struct cb_kernel {
const void *data;
u32 size;
};
#define CB_KERNEL(name) { .data = (name), .size = sizeof(name) }
#include "ivb_clear_kernel.c"
static const struct cb_kernel cb_kernel_ivb = CB_KERNEL(ivb_clear_kernel);
#include "hsw_clear_kernel.c"
static const struct cb_kernel cb_kernel_hsw = CB_KERNEL(hsw_clear_kernel);
struct batch_chunk {
struct i915_vma *vma;
u32 offset;
u32 *start;
u32 *end;
u32 max_items;
};
struct batch_vals {
u32 max_threads;
u32 state_start;
u32 surface_start;
u32 surface_height;
u32 surface_width;
u32 size;
};
static int num_primitives(const struct batch_vals *bv)
{
/*
* We need to saturate the GPU with work in order to dispatch
* a shader on every HW thread, and clear the thread-local registers.
* In short, we have to dispatch work faster than the shaders can
* run in order to fill the EU and occupy each HW thread.
*/
return bv->max_threads;
}
static void
batch_get_defaults(struct drm_i915_private *i915, struct batch_vals *bv)
{
if (IS_HASWELL(i915)) {
switch (INTEL_INFO(i915)->gt) {
default:
case 1:
bv->max_threads = 70;
break;
case 2:
bv->max_threads = 140;
break;
case 3:
bv->max_threads = 280;
break;
}
bv->surface_height = 16 * 16;
bv->surface_width = 32 * 2 * 16;
} else {
switch (INTEL_INFO(i915)->gt) {
default:
case 1: /* including vlv */
bv->max_threads = 36;
break;
case 2:
bv->max_threads = 128;
break;
}
bv->surface_height = 16 * 8;
bv->surface_width = 32 * 16;
}
bv->state_start = round_up(SZ_1K + num_primitives(bv) * 64, SZ_4K);
bv->surface_start = bv->state_start + SZ_4K;
bv->size = bv->surface_start + bv->surface_height * bv->surface_width;
}
static void batch_init(struct batch_chunk *bc,
struct i915_vma *vma,
u32 *start, u32 offset, u32 max_bytes)
{
bc->vma = vma;
bc->offset = offset;
bc->start = start + bc->offset / sizeof(*bc->start);
bc->end = bc->start;
bc->max_items = max_bytes / sizeof(*bc->start);
}
static u32 batch_offset(const struct batch_chunk *bc, u32 *cs)
{
return (cs - bc->start) * sizeof(*bc->start) + bc->offset;
}
static u32 batch_addr(const struct batch_chunk *bc)
{
return i915_vma_offset(bc->vma);
}
static void batch_add(struct batch_chunk *bc, const u32 d)
{
GEM_BUG_ON((bc->end - bc->start) >= bc->max_items);
*bc->end++ = d;
}
static u32 *batch_alloc_items(struct batch_chunk *bc, u32 align, u32 items)
{
u32 *map;
if (align) {
u32 *end = PTR_ALIGN(bc->end, align);
memset32(bc->end, 0, end - bc->end);
bc->end = end;
}
map = bc->end;
bc->end += items;
return map;
}
static u32 *batch_alloc_bytes(struct batch_chunk *bc, u32 align, u32 bytes)
{
GEM_BUG_ON(!IS_ALIGNED(bytes, sizeof(*bc->start)));
return batch_alloc_items(bc, align, bytes / sizeof(*bc->start));
}
static u32
gen7_fill_surface_state(struct batch_chunk *state,
const u32 dst_offset,
const struct batch_vals *bv)
{
u32 surface_h = bv->surface_height;
u32 surface_w = bv->surface_width;
u32 *cs = batch_alloc_items(state, 32, 8);
u32 offset = batch_offset(state, cs);
#define SURFACE_2D 1
#define SURFACEFORMAT_B8G8R8A8_UNORM 0x0C0
#define RENDER_CACHE_READ_WRITE 1
*cs++ = SURFACE_2D << 29 |
(SURFACEFORMAT_B8G8R8A8_UNORM << 18) |
(RENDER_CACHE_READ_WRITE << 8);
*cs++ = batch_addr(state) + dst_offset;
*cs++ = ((surface_h / 4 - 1) << 16) | (surface_w / 4 - 1);
*cs++ = surface_w;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
#define SHADER_CHANNELS(r, g, b, a) \
(((r) << 25) | ((g) << 22) | ((b) << 19) | ((a) << 16))
*cs++ = SHADER_CHANNELS(4, 5, 6, 7);
batch_advance(state, cs);
return offset;
}
static u32
gen7_fill_binding_table(struct batch_chunk *state,
const struct batch_vals *bv)
{
u32 surface_start =
gen7_fill_surface_state(state, bv->surface_start, bv);
u32 *cs = batch_alloc_items(state, 32, 8);
u32 offset = batch_offset(state, cs);
*cs++ = surface_start - state->offset;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
batch_advance(state, cs);
return offset;
}
static u32
gen7_fill_kernel_data(struct batch_chunk *state,
const u32 *data,
const u32 size)
{
return batch_offset(state,
memcpy(batch_alloc_bytes(state, 64, size),
data, size));
}
static u32
gen7_fill_interface_descriptor(struct batch_chunk *state,
const struct batch_vals *bv,
const struct cb_kernel *kernel,
unsigned int count)
{
u32 kernel_offset =
gen7_fill_kernel_data(state, kernel->data, kernel->size);
u32 binding_table = gen7_fill_binding_table(state, bv);
u32 *cs = batch_alloc_items(state, 32, 8 * count);
u32 offset = batch_offset(state, cs);
*cs++ = kernel_offset;
*cs++ = (1 << 7) | (1 << 13);
*cs++ = 0;
*cs++ = (binding_table - state->offset) | 1;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
/* 1 - 63dummy idds */
memset32(cs, 0x00, (count - 1) * 8);
batch_advance(state, cs + (count - 1) * 8);
return offset;
}
static void
gen7_emit_state_base_address(struct batch_chunk *batch,
u32 surface_state_base)
{
u32 *cs = batch_alloc_items(batch, 0, 10);
*cs++ = STATE_BASE_ADDRESS | (10 - 2);
/* general */
*cs++ = batch_addr(batch) | BASE_ADDRESS_MODIFY;
/* surface */
*cs++ = (batch_addr(batch) + surface_state_base) | BASE_ADDRESS_MODIFY;
/* dynamic */
*cs++ = batch_addr(batch) | BASE_ADDRESS_MODIFY;
/* indirect */
*cs++ = batch_addr(batch) | BASE_ADDRESS_MODIFY;
/* instruction */
*cs++ = batch_addr(batch) | BASE_ADDRESS_MODIFY;
/* general/dynamic/indirect/instruction access Bound */
*cs++ = 0;
*cs++ = BASE_ADDRESS_MODIFY;
*cs++ = 0;
*cs++ = BASE_ADDRESS_MODIFY;
batch_advance(batch, cs);
}
static void
gen7_emit_vfe_state(struct batch_chunk *batch,
const struct batch_vals *bv,
u32 urb_size, u32 curbe_size,
u32 mode)
{
u32 threads = bv->max_threads - 1;
u32 *cs = batch_alloc_items(batch, 32, 8);
*cs++ = MEDIA_VFE_STATE | (8 - 2);
/* scratch buffer */
*cs++ = 0;
/* number of threads & urb entries for GPGPU vs Media Mode */
*cs++ = threads << 16 | 1 << 8 | mode << 2;
*cs++ = 0;
/* urb entry size & curbe size in 256 bits unit */
*cs++ = urb_size << 16 | curbe_size;
/* scoreboard */
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
batch_advance(batch, cs);
}
static void
gen7_emit_interface_descriptor_load(struct batch_chunk *batch,
const u32 interface_descriptor,
unsigned int count)
{
u32 *cs = batch_alloc_items(batch, 8, 4);
*cs++ = MEDIA_INTERFACE_DESCRIPTOR_LOAD | (4 - 2);
*cs++ = 0;
*cs++ = count * 8 * sizeof(*cs);
/*
* interface descriptor address - it is relative to the dynamics base
* address
*/
*cs++ = interface_descriptor;
batch_advance(batch, cs);
}
static void
gen7_emit_media_object(struct batch_chunk *batch,
unsigned int media_object_index)
{
unsigned int x_offset = (media_object_index % 16) * 64;
unsigned int y_offset = (media_object_index / 16) * 16;
unsigned int pkt = 6 + 3;
u32 *cs;
cs = batch_alloc_items(batch, 8, pkt);
*cs++ = MEDIA_OBJECT | (pkt - 2);
/* interface descriptor offset */
*cs++ = 0;
/* without indirect data */
*cs++ = 0;
*cs++ = 0;
/* scoreboard */
*cs++ = 0;
*cs++ = 0;
/* inline */
*cs++ = y_offset << 16 | x_offset;
*cs++ = 0;
*cs++ = GT3_INLINE_DATA_DELAYS;
batch_advance(batch, cs);
}
static void gen7_emit_pipeline_flush(struct batch_chunk *batch)
{
u32 *cs = batch_alloc_items(batch, 0, 4);
*cs++ = GFX_OP_PIPE_CONTROL(4);
*cs++ = PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH |
PIPE_CONTROL_DEPTH_CACHE_FLUSH |
PIPE_CONTROL_DC_FLUSH_ENABLE |
PIPE_CONTROL_CS_STALL;
*cs++ = 0;
*cs++ = 0;
batch_advance(batch, cs);
}
static void gen7_emit_pipeline_invalidate(struct batch_chunk *batch)
{
u32 *cs = batch_alloc_items(batch, 0, 10);
/* ivb: Stall before STATE_CACHE_INVALIDATE */
*cs++ = GFX_OP_PIPE_CONTROL(5);
*cs++ = PIPE_CONTROL_STALL_AT_SCOREBOARD |
PIPE_CONTROL_CS_STALL;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
*cs++ = GFX_OP_PIPE_CONTROL(5);
*cs++ = PIPE_CONTROL_STATE_CACHE_INVALIDATE;
*cs++ = 0;
*cs++ = 0;
*cs++ = 0;
batch_advance(batch, cs);
}
static void emit_batch(struct i915_vma * const vma,
u32 *start,
const struct batch_vals *bv)
{
struct drm_i915_private *i915 = vma->vm->i915;
const unsigned int desc_count = 1;
const unsigned int urb_size = 1;
struct batch_chunk cmds, state;
u32 descriptors;
unsigned int i;
batch_init(&cmds, vma, start, 0, bv->state_start);
batch_init(&state, vma, start, bv->state_start, SZ_4K);
descriptors = gen7_fill_interface_descriptor(&state, bv,
IS_HASWELL(i915) ?
&cb_kernel_hsw :
&cb_kernel_ivb,
desc_count);
/* Reset inherited context registers */
gen7_emit_pipeline_flush(&cmds);
gen7_emit_pipeline_invalidate(&cmds);
batch_add(&cmds, MI_LOAD_REGISTER_IMM(2));
batch_add(&cmds, i915_mmio_reg_offset(CACHE_MODE_0_GEN7));
batch_add(&cmds, 0xffff0000 |
((IS_IVB_GT1(i915) || IS_VALLEYVIEW(i915)) ?
HIZ_RAW_STALL_OPT_DISABLE :
0));
batch_add(&cmds, i915_mmio_reg_offset(CACHE_MODE_1));
batch_add(&cmds, 0xffff0000 | PIXEL_SUBSPAN_COLLECT_OPT_DISABLE);
gen7_emit_pipeline_invalidate(&cmds);
gen7_emit_pipeline_flush(&cmds);
/* Switch to the media pipeline and our base address */
gen7_emit_pipeline_invalidate(&cmds);
batch_add(&cmds, PIPELINE_SELECT | PIPELINE_SELECT_MEDIA);
batch_add(&cmds, MI_NOOP);
gen7_emit_pipeline_invalidate(&cmds);
gen7_emit_pipeline_flush(&cmds);
gen7_emit_state_base_address(&cmds, descriptors);
gen7_emit_pipeline_invalidate(&cmds);
/* Set the clear-residual kernel state */
gen7_emit_vfe_state(&cmds, bv, urb_size - 1, 0, 0);
gen7_emit_interface_descriptor_load(&cmds, descriptors, desc_count);
/* Execute the kernel on all HW threads */
for (i = 0; i < num_primitives(bv); i++)
gen7_emit_media_object(&cmds, i);
batch_add(&cmds, MI_BATCH_BUFFER_END);
}
int gen7_setup_clear_gpr_bb(struct intel_engine_cs * const engine,
struct i915_vma * const vma)
{
struct batch_vals bv;
u32 *batch;
batch_get_defaults(engine->i915, &bv);
if (!vma)
return bv.size;
GEM_BUG_ON(vma->obj->base.size < bv.size);
batch = i915_gem_object_pin_map(vma->obj, I915_MAP_WC);
if (IS_ERR(batch))
return PTR_ERR(batch);
emit_batch(vma, memset(batch, 0, bv.size), &bv);
i915_gem_object_flush_map(vma->obj);
__i915_gem_object_release_map(vma->obj);
return 0;
}