linux-nvgpu/drivers/gpu/nvgpu/hal/mc/mc_gm20b.c

/*
 * GM20B Master Control
 *
 * Copyright (c) 2014-2019, 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 <nvgpu/timers.h>
#include <nvgpu/atomic.h>
#include <nvgpu/unit.h>
#include <nvgpu/io.h>
#include <nvgpu/mc.h>
#include <nvgpu/ltc.h>
#include <nvgpu/gk20a.h>
#include <nvgpu/bug.h>
#include <nvgpu/engines.h>
#include <nvgpu/power_features/pg.h>

#include "mc_gm20b.h"

#include <nvgpu/hw/gm20b/hw_mc_gm20b.h>

void gm20b_mc_isr_stall(struct gk20a *g)
{
	u32 mc_intr_0;
	u32 eng_id;
	u32 act_eng_id = 0U;
	enum nvgpu_fifo_engine engine_enum;

	mc_intr_0 = g->ops.mc.intr_stall(g);

	nvgpu_log(g, gpu_dbg_intr, "stall intr %08x", mc_intr_0);

	for (eng_id = 0U; eng_id < g->fifo.num_engines; eng_id++) {
		act_eng_id = g->fifo.active_engines_list[eng_id];

		if ((mc_intr_0 &
			g->fifo.engine_info[act_eng_id].intr_mask) == 0U) {
			continue;
		}
		engine_enum = g->fifo.engine_info[act_eng_id].engine_enum;
		/* GR Engine */
		if (engine_enum == NVGPU_ENGINE_GR) {
			nvgpu_pg_elpg_protected_call(g,
						g->ops.gr.intr.stall_isr(g));
		}

		/* CE Engine */
		if (((engine_enum == NVGPU_ENGINE_GRCE) ||
				(engine_enum == NVGPU_ENGINE_ASYNC_CE)) &&
				(g->ops.ce.isr_stall != NULL)) {
			g->ops.ce.isr_stall(g,
				g->fifo.engine_info[act_eng_id].inst_id,
				g->fifo.engine_info[act_eng_id].pri_base);
		}
	}
	if ((mc_intr_0 & mc_intr_pfifo_pending_f()) != 0U) {
		g->ops.fifo.intr_0_isr(g);
	}
#ifdef CONFIG_NVGPU_LS_PMU
	if ((mc_intr_0 & mc_intr_pmu_pending_f()) != 0U) {
		g->ops.pmu.pmu_isr(g);
	}
#endif
	if ((mc_intr_0 & mc_intr_priv_ring_pending_f()) != 0U) {
		g->ops.priv_ring.isr(g);
	}
	if ((mc_intr_0 & mc_intr_ltc_pending_f()) != 0U) {
		g->ops.mc.ltc_isr(g);
	}
	if ((mc_intr_0 & mc_intr_pbus_pending_f()) != 0U) {
		g->ops.bus.isr(g);
	}
}

void gm20b_mc_intr_mask(struct gk20a *g)
{
	nvgpu_writel(g, mc_intr_en_0_r(),
		mc_intr_en_0_inta_disabled_f());
	nvgpu_writel(g, mc_intr_en_1_r(),
		mc_intr_en_1_inta_disabled_f());
}

void gm20b_mc_intr_enable(struct gk20a *g)
{
	u32 eng_intr_mask = nvgpu_engine_interrupt_mask(g);

	nvgpu_writel(g, mc_intr_mask_1_r(),
		     mc_intr_pfifo_pending_f()
		     | eng_intr_mask);
	nvgpu_writel(g, mc_intr_en_1_r(),
		mc_intr_en_1_inta_hardware_f());

	nvgpu_writel(g, mc_intr_mask_0_r(),
		     mc_intr_pfifo_pending_f()
		     | mc_intr_priv_ring_pending_f()
		     | mc_intr_ltc_pending_f()
		     | mc_intr_pbus_pending_f()
		     | eng_intr_mask);
	nvgpu_writel(g, mc_intr_en_0_r(),
		mc_intr_en_0_inta_hardware_f());
}

void gm20b_mc_intr_pmu_unit_config(struct gk20a *g, bool enable)
{
	if (enable) {
		nvgpu_writel(g, mc_intr_mask_0_r(),
			nvgpu_readl(g, mc_intr_mask_0_r()) |
			mc_intr_mask_0_pmu_enabled_f());
	} else {
		nvgpu_writel(g, mc_intr_mask_0_r(),
			nvgpu_readl(g, mc_intr_mask_0_r()) &
			~mc_intr_mask_0_pmu_enabled_f());
		nvgpu_writel(g, mc_intr_mask_1_r(),
			nvgpu_readl(g, mc_intr_mask_1_r()) &
			~mc_intr_mask_1_pmu_enabled_f());
	}
}

void gm20b_mc_intr_stall_pause(struct gk20a *g)
{
	nvgpu_writel(g, mc_intr_en_0_r(),
		mc_intr_en_0_inta_disabled_f());

	/* flush previous write */
	(void) nvgpu_readl(g, mc_intr_en_0_r());
}

void gm20b_mc_intr_stall_resume(struct gk20a *g)
{
	nvgpu_writel(g, mc_intr_en_0_r(),
		mc_intr_en_0_inta_hardware_f());

	/* flush previous write */
	(void) nvgpu_readl(g, mc_intr_en_0_r());
}

void gm20b_mc_intr_nonstall_pause(struct gk20a *g)
{
	nvgpu_writel(g, mc_intr_en_1_r(),
		mc_intr_en_0_inta_disabled_f());

	/* flush previous write */
	(void) nvgpu_readl(g, mc_intr_en_1_r());
}

void gm20b_mc_intr_nonstall_resume(struct gk20a *g)
{
	nvgpu_writel(g, mc_intr_en_1_r(),
		mc_intr_en_0_inta_hardware_f());

	/* flush previous write */
	(void) nvgpu_readl(g, mc_intr_en_1_r());
}

u32 gm20b_mc_intr_stall(struct gk20a *g)
{
	return nvgpu_readl(g, mc_intr_r(NVGPU_MC_INTR_STALLING));
}

u32 gm20b_mc_intr_nonstall(struct gk20a *g)
{
	return nvgpu_readl(g, mc_intr_r(NVGPU_MC_INTR_NONSTALLING));
}

bool gm20b_mc_is_intr1_pending(struct gk20a *g,
			       enum nvgpu_unit unit, u32 mc_intr_1)
{
	u32 mask;
	bool is_pending;

	switch (unit) {
	case NVGPU_UNIT_FIFO:
		mask = mc_intr_pfifo_pending_f();
		break;
	default:
		mask = 0U;
		break;
	}

	if (mask == 0U) {
		nvgpu_err(g, "unknown unit %d", unit);
		is_pending = false;
	} else {
		is_pending = ((mc_intr_1 & mask) != 0U);
	}

	return is_pending;
}

void gm20b_mc_log_pending_intrs(struct gk20a *g)
{
	u32 mc_intr_0;
	u32 mc_intr_1;

	mc_intr_0 = g->ops.mc.intr_stall(g);
	if (mc_intr_0 != 0U) {
		if ((mc_intr_0 & mc_intr_priv_ring_pending_f()) != 0U) {
			/* clear priv ring interrupts */
			g->ops.priv_ring.isr(g);
		}
		mc_intr_0 = g->ops.mc.intr_stall(g);
		if (mc_intr_0 != 0U) {
			nvgpu_info(g, "Pending stall intr0=0x%08x", mc_intr_0);
		}
	}

	mc_intr_1 = g->ops.mc.intr_nonstall(g);
	if (mc_intr_1 != 0U) {
		nvgpu_info(g, "Pending nonstall intr1=0x%08x", mc_intr_1);
	}
}

void gm20b_mc_fb_reset(struct gk20a *g)
{
	u32 val;

	nvgpu_log_info(g, "reset gk20a fb");

	val = nvgpu_readl(g, mc_elpg_enable_r());
	val |= mc_elpg_enable_xbar_enabled_f()
		| mc_elpg_enable_pfb_enabled_f()
		| mc_elpg_enable_hub_enabled_f();
	nvgpu_writel(g, mc_elpg_enable_r(), val);
}

void gm20b_mc_ltc_isr(struct gk20a *g)
{
	u32 mc_intr;
	u32 ltc;

	mc_intr = nvgpu_readl(g, mc_intr_ltc_r());
	nvgpu_err(g, "mc_ltc_intr: %08x", mc_intr);
	for (ltc = 0; ltc < nvgpu_ltc_get_ltc_count(g); ltc++) {
		if ((mc_intr & BIT32(ltc)) == 0U) {
			continue;
		}
		g->ops.ltc.intr.isr(g, ltc);
	}
}

bool gm20b_mc_is_mmu_fault_pending(struct gk20a *g)
{
	return g->ops.fifo.is_mmu_fault_pending(g);
}