linux-nvgpu/drivers/gpu/nvgpu/gv11b/subctx_gv11b.c

/*
 * Volta GPU series Subcontext
 *
 * Copyright (c) 2016-2017, NVIDIA CORPORATION.  All rights reserved.
 *
 * 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.
 */

#include "gk20a/gk20a.h"

#include "gv11b/subctx_gv11b.h"

#include <nvgpu/dma.h>
#include <nvgpu/log.h>
#include <nvgpu/gmmu.h>

#include <nvgpu/hw/gv11b/hw_ram_gv11b.h>
#include <nvgpu/hw/gv11b/hw_ctxsw_prog_gv11b.h>

static void gv11b_init_subcontext_pdb(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block);

static void gv11b_subctx_commit_valid_mask(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block);
static void gv11b_subctx_commit_pdb(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block);

void gv11b_free_subctx_header(struct channel_gk20a *c)
{
	struct ctx_header_desc *ctx = &c->ch_ctx.ctx_header;
	struct gk20a *g = c->g;

	nvgpu_log(g, gpu_dbg_fn, "gv11b_free_subctx_header");

	if (ctx->mem.gpu_va) {
		nvgpu_gmmu_unmap(c->vm, &ctx->mem, ctx->mem.gpu_va);

		nvgpu_dma_free(g, &ctx->mem);
	}
}

int gv11b_alloc_subctx_header(struct channel_gk20a *c)
{
	struct ctx_header_desc *ctx = &c->ch_ctx.ctx_header;
	struct gk20a *g = c->g;
	int ret = 0;

	nvgpu_log(g, gpu_dbg_fn, "gv11b_alloc_subctx_header");

	if (ctx->mem.gpu_va == 0) {
		ret = nvgpu_dma_alloc_flags_sys(g,
				0, /* No Special flags */
				ctxsw_prog_fecs_header_v(),
				&ctx->mem);
		if (ret) {
			nvgpu_err(g, "failed to allocate sub ctx header");
			return ret;
		}
		ctx->mem.gpu_va = nvgpu_gmmu_map(c->vm,
					&ctx->mem,
					ctx->mem.size,
					0, /* not GPU-cacheable */
					gk20a_mem_flag_none, true,
					ctx->mem.aperture);
		if (!ctx->mem.gpu_va) {
			nvgpu_err(g, "failed to map ctx header");
			nvgpu_dma_free(g, &ctx->mem);
			return -ENOMEM;
		}
		/* Now clear the buffer */
		if (nvgpu_mem_begin(g, &ctx->mem))
			return -ENOMEM;

		nvgpu_memset(g, &ctx->mem, 0, 0, ctx->mem.size);
		nvgpu_mem_end(g, &ctx->mem);

		gv11b_init_subcontext_pdb(c, &c->inst_block);
	}
	return ret;
}

static void gv11b_init_subcontext_pdb(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block)
{
	struct gk20a *g = c->g;

	gv11b_subctx_commit_pdb(c, inst_block);
	gv11b_subctx_commit_valid_mask(c, inst_block);

	nvgpu_log(g, gpu_dbg_info, " subctx %d instblk set", c->t19x.subctx_id);
	nvgpu_mem_wr32(g, inst_block, ram_in_engine_wfi_veid_w(),
			ram_in_engine_wfi_veid_f(c->t19x.subctx_id));

}

int gv11b_update_subctx_header(struct channel_gk20a *c, u64 gpu_va)
{
	struct ctx_header_desc *ctx = &c->ch_ctx.ctx_header;
	struct nvgpu_mem *gr_mem;
	struct gk20a *g = c->g;
	int ret = 0;
	u32 addr_lo, addr_hi;

	addr_lo = u64_lo32(gpu_va);
	addr_hi = u64_hi32(gpu_va);

	gr_mem = &ctx->mem;
	g->ops.mm.l2_flush(g, true);
	if (nvgpu_mem_begin(g, gr_mem))
		return -ENOMEM;

	nvgpu_mem_wr(g, gr_mem,
		ctxsw_prog_main_image_context_buffer_ptr_hi_o(), addr_hi);
	nvgpu_mem_wr(g, gr_mem,
		ctxsw_prog_main_image_context_buffer_ptr_o(), addr_lo);

	nvgpu_mem_wr(g, gr_mem,
                ctxsw_prog_main_image_ctl_o(),
                ctxsw_prog_main_image_ctl_type_per_veid_header_v());
	nvgpu_mem_end(g, gr_mem);
	return ret;
}

void gv11b_subctx_commit_valid_mask(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block)
{
	struct gk20a *g = c->g;

	/* Make all subctx pdbs valid */
	nvgpu_mem_wr32(g, inst_block, 166, 0xffffffff);
	nvgpu_mem_wr32(g, inst_block, 167, 0xffffffff);
}

void gv11b_subctx_commit_pdb(struct channel_gk20a *c,
				struct nvgpu_mem *inst_block)
{
	struct gk20a *g = c->g;
	struct fifo_gk20a *f = &g->fifo;
	struct vm_gk20a *vm = c->vm;
	u32 lo, hi;
	u32 subctx_id = 0;
	u32 format_word;
	u32 pdb_addr_lo, pdb_addr_hi;
	u64 pdb_addr;
	u32 aperture = nvgpu_aperture_mask(g, vm->pdb.mem,
			ram_in_sc_page_dir_base_target_sys_mem_ncoh_v(),
			ram_in_sc_page_dir_base_target_vid_mem_v());

	pdb_addr = nvgpu_mem_get_addr(g, vm->pdb.mem);
	pdb_addr_lo = u64_lo32(pdb_addr >> ram_in_base_shift_v());
	pdb_addr_hi = u64_hi32(pdb_addr);
	format_word = ram_in_sc_page_dir_base_target_f(
		aperture, 0) |
		ram_in_sc_page_dir_base_vol_f(
		ram_in_sc_page_dir_base_vol_true_v(), 0) |
		ram_in_sc_page_dir_base_fault_replay_tex_f(1, 0) |
		ram_in_sc_page_dir_base_fault_replay_gcc_f(1, 0) |
		ram_in_sc_use_ver2_pt_format_f(1, 0) |
		ram_in_sc_big_page_size_f(1, 0) |
		ram_in_sc_page_dir_base_lo_0_f(pdb_addr_lo);
	nvgpu_log(g, gpu_dbg_info, " pdb info lo %x hi %x",
					format_word, pdb_addr_hi);
	for (subctx_id = 0; subctx_id < f->t19x.max_subctx_count; subctx_id++) {
		lo = ram_in_sc_page_dir_base_vol_0_w() + (4 * subctx_id);
		hi = ram_in_sc_page_dir_base_hi_0_w() + (4 * subctx_id);
		nvgpu_mem_wr32(g, inst_block, lo, format_word);
		nvgpu_mem_wr32(g, inst_block, hi, pdb_addr_hi);
	}
}