linux-next/drivers/accel/ivpu/ivpu_hw.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2020 - 2024 Intel Corporation
 */

#include "ivpu_drv.h"
#include "ivpu_hw.h"
#include "ivpu_hw_btrs.h"
#include "ivpu_hw_ip.h"

#include <linux/dmi.h>

static char *platform_to_str(u32 platform)
{
	switch (platform) {
	case IVPU_PLATFORM_SILICON:
		return "SILICON";
	case IVPU_PLATFORM_SIMICS:
		return "SIMICS";
	case IVPU_PLATFORM_FPGA:
		return "FPGA";
	default:
		return "Invalid platform";
	}
}

static const struct dmi_system_id dmi_platform_simulation[] = {
	{
		.ident = "Intel Simics",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "lnlrvp"),
			DMI_MATCH(DMI_BOARD_VERSION, "1.0"),
			DMI_MATCH(DMI_BOARD_SERIAL, "123456789"),
		},
	},
	{
		.ident = "Intel Simics",
		.matches = {
			DMI_MATCH(DMI_BOARD_NAME, "Simics"),
		},
	},
	{ }
};

static void platform_init(struct ivpu_device *vdev)
{
	if (dmi_check_system(dmi_platform_simulation))
		vdev->platform = IVPU_PLATFORM_SIMICS;
	else
		vdev->platform = IVPU_PLATFORM_SILICON;

	ivpu_dbg(vdev, MISC, "Platform type: %s (%d)\n",
		 platform_to_str(vdev->platform), vdev->platform);
}

static void wa_init(struct ivpu_device *vdev)
{
	vdev->wa.punit_disabled = ivpu_is_fpga(vdev);
	vdev->wa.clear_runtime_mem = false;

	if (ivpu_hw_btrs_gen(vdev) == IVPU_HW_BTRS_MTL)
		vdev->wa.interrupt_clear_with_0 = ivpu_hw_btrs_irqs_clear_with_0_mtl(vdev);

	if (ivpu_device_id(vdev) == PCI_DEVICE_ID_LNL &&
	    ivpu_revision(vdev) < IVPU_HW_IP_REV_LNL_B0)
		vdev->wa.disable_clock_relinquish = true;

	if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX)
		vdev->wa.wp0_during_power_up = true;

	IVPU_PRINT_WA(punit_disabled);
	IVPU_PRINT_WA(clear_runtime_mem);
	IVPU_PRINT_WA(interrupt_clear_with_0);
	IVPU_PRINT_WA(disable_clock_relinquish);
	IVPU_PRINT_WA(wp0_during_power_up);
}

static void timeouts_init(struct ivpu_device *vdev)
{
	if (ivpu_test_mode & IVPU_TEST_MODE_DISABLE_TIMEOUTS) {
		vdev->timeout.boot = -1;
		vdev->timeout.jsm = -1;
		vdev->timeout.tdr = -1;
		vdev->timeout.autosuspend = -1;
		vdev->timeout.d0i3_entry_msg = -1;
	} else if (ivpu_is_fpga(vdev)) {
		vdev->timeout.boot = 100000;
		vdev->timeout.jsm = 50000;
		vdev->timeout.tdr = 2000000;
		vdev->timeout.autosuspend = -1;
		vdev->timeout.d0i3_entry_msg = 500;
	} else if (ivpu_is_simics(vdev)) {
		vdev->timeout.boot = 50;
		vdev->timeout.jsm = 500;
		vdev->timeout.tdr = 10000;
		vdev->timeout.autosuspend = -1;
		vdev->timeout.d0i3_entry_msg = 100;
	} else {
		vdev->timeout.boot = 1000;
		vdev->timeout.jsm = 500;
		vdev->timeout.tdr = 2000;
		if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX)
			vdev->timeout.autosuspend = 10;
		else
			vdev->timeout.autosuspend = 100;
		vdev->timeout.d0i3_entry_msg = 5;
	}
}

static void memory_ranges_init(struct ivpu_device *vdev)
{
	if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX) {
		ivpu_hw_range_init(&vdev->hw->ranges.global, 0x80000000, SZ_512M);
		ivpu_hw_range_init(&vdev->hw->ranges.user,   0xc0000000, 255 * SZ_1M);
		ivpu_hw_range_init(&vdev->hw->ranges.shave, 0x180000000, SZ_2G);
		ivpu_hw_range_init(&vdev->hw->ranges.dma,   0x200000000, SZ_8G);
	} else {
		ivpu_hw_range_init(&vdev->hw->ranges.global, 0x80000000, SZ_512M);
		ivpu_hw_range_init(&vdev->hw->ranges.user,   0x80000000, SZ_256M);
		ivpu_hw_range_init(&vdev->hw->ranges.shave,  0x80000000 + SZ_256M, SZ_2G - SZ_256M);
		ivpu_hw_range_init(&vdev->hw->ranges.dma,   0x200000000, SZ_8G);
	}
}

static int wp_enable(struct ivpu_device *vdev)
{
	return ivpu_hw_btrs_wp_drive(vdev, true);
}

static int wp_disable(struct ivpu_device *vdev)
{
	return ivpu_hw_btrs_wp_drive(vdev, false);
}

int ivpu_hw_power_up(struct ivpu_device *vdev)
{
	int ret;

	if (IVPU_WA(wp0_during_power_up)) {
		/* WP requests may fail when powering down, so issue WP 0 here */
		ret = wp_disable(vdev);
		if (ret)
			ivpu_warn(vdev, "Failed to disable workpoint: %d\n", ret);
	}

	ret = ivpu_hw_btrs_d0i3_disable(vdev);
	if (ret)
		ivpu_warn(vdev, "Failed to disable D0I3: %d\n", ret);

	ret = wp_enable(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to enable workpoint: %d\n", ret);
		return ret;
	}

	if (ivpu_hw_btrs_gen(vdev) >= IVPU_HW_BTRS_LNL) {
		if (IVPU_WA(disable_clock_relinquish))
			ivpu_hw_btrs_clock_relinquish_disable_lnl(vdev);
		ivpu_hw_btrs_profiling_freq_reg_set_lnl(vdev);
		ivpu_hw_btrs_ats_print_lnl(vdev);
	}

	ret = ivpu_hw_ip_host_ss_configure(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to configure host SS: %d\n", ret);
		return ret;
	}

	ivpu_hw_ip_idle_gen_disable(vdev);

	ret = ivpu_hw_btrs_wait_for_clock_res_own_ack(vdev);
	if (ret) {
		ivpu_err(vdev, "Timed out waiting for clock resource own ACK\n");
		return ret;
	}

	ret = ivpu_hw_ip_pwr_domain_enable(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to enable power domain: %d\n", ret);
		return ret;
	}

	ret = ivpu_hw_ip_host_ss_axi_enable(vdev);
	if (ret) {
		ivpu_err(vdev, "Failed to enable AXI: %d\n", ret);
		return ret;
	}

	if (ivpu_hw_btrs_gen(vdev) == IVPU_HW_BTRS_LNL)
		ivpu_hw_btrs_set_port_arbitration_weights_lnl(vdev);

	ret = ivpu_hw_ip_top_noc_enable(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to enable TOP NOC: %d\n", ret);

	return ret;
}

static void save_d0i3_entry_timestamp(struct ivpu_device *vdev)
{
	vdev->hw->d0i3_entry_host_ts = ktime_get_boottime();
	vdev->hw->d0i3_entry_vpu_ts = ivpu_hw_ip_read_perf_timer_counter(vdev);
}

int ivpu_hw_reset(struct ivpu_device *vdev)
{
	int ret = 0;

	if (ivpu_hw_btrs_ip_reset(vdev)) {
		ivpu_err(vdev, "Failed to reset NPU IP\n");
		ret = -EIO;
	}

	if (wp_disable(vdev)) {
		ivpu_err(vdev, "Failed to disable workpoint\n");
		ret = -EIO;
	}

	return ret;
}

int ivpu_hw_power_down(struct ivpu_device *vdev)
{
	int ret = 0;

	save_d0i3_entry_timestamp(vdev);

	if (!ivpu_hw_is_idle(vdev))
		ivpu_warn(vdev, "NPU not idle during power down\n");

	if (ivpu_hw_reset(vdev)) {
		ivpu_err(vdev, "Failed to reset NPU\n");
		ret = -EIO;
	}

	if (ivpu_hw_btrs_d0i3_enable(vdev)) {
		ivpu_err(vdev, "Failed to enter D0I3\n");
		ret = -EIO;
	}

	return ret;
}

int ivpu_hw_init(struct ivpu_device *vdev)
{
	ivpu_hw_btrs_info_init(vdev);
	ivpu_hw_btrs_freq_ratios_init(vdev);
	memory_ranges_init(vdev);
	platform_init(vdev);
	wa_init(vdev);
	timeouts_init(vdev);

	return 0;
}

int ivpu_hw_boot_fw(struct ivpu_device *vdev)
{
	int ret;

	ivpu_hw_ip_snoop_disable(vdev);
	ivpu_hw_ip_tbu_mmu_enable(vdev);
	ret = ivpu_hw_ip_soc_cpu_boot(vdev);
	if (ret)
		ivpu_err(vdev, "Failed to boot SOC CPU: %d\n", ret);

	return ret;
}

void ivpu_hw_profiling_freq_drive(struct ivpu_device *vdev, bool enable)
{
	if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX) {
		vdev->hw->pll.profiling_freq = PLL_PROFILING_FREQ_DEFAULT;
		return;
	}

	if (enable)
		vdev->hw->pll.profiling_freq = PLL_PROFILING_FREQ_HIGH;
	else
		vdev->hw->pll.profiling_freq = PLL_PROFILING_FREQ_DEFAULT;
}

void ivpu_irq_handlers_init(struct ivpu_device *vdev)
{
	INIT_KFIFO(vdev->hw->irq.fifo);

	if (ivpu_hw_ip_gen(vdev) == IVPU_HW_IP_37XX)
		vdev->hw->irq.ip_irq_handler = ivpu_hw_ip_irq_handler_37xx;
	else
		vdev->hw->irq.ip_irq_handler = ivpu_hw_ip_irq_handler_40xx;

	if (ivpu_hw_btrs_gen(vdev) == IVPU_HW_BTRS_MTL)
		vdev->hw->irq.btrs_irq_handler = ivpu_hw_btrs_irq_handler_mtl;
	else
		vdev->hw->irq.btrs_irq_handler = ivpu_hw_btrs_irq_handler_lnl;
}

void ivpu_hw_irq_enable(struct ivpu_device *vdev)
{
	kfifo_reset(&vdev->hw->irq.fifo);
	ivpu_hw_ip_irq_enable(vdev);
	ivpu_hw_btrs_irq_enable(vdev);
}

void ivpu_hw_irq_disable(struct ivpu_device *vdev)
{
	ivpu_hw_btrs_irq_disable(vdev);
	ivpu_hw_ip_irq_disable(vdev);
}

irqreturn_t ivpu_hw_irq_handler(int irq, void *ptr)
{
	struct ivpu_device *vdev = ptr;
	bool ip_handled, btrs_handled;

	ivpu_hw_btrs_global_int_disable(vdev);

	btrs_handled = ivpu_hw_btrs_irq_handler(vdev, irq);
	if (!ivpu_hw_is_idle((vdev)) || !btrs_handled)
		ip_handled = ivpu_hw_ip_irq_handler(vdev, irq);
	else
		ip_handled = false;

	/* Re-enable global interrupts to re-trigger MSI for pending interrupts */
	ivpu_hw_btrs_global_int_enable(vdev);

	if (!kfifo_is_empty(&vdev->hw->irq.fifo))
		return IRQ_WAKE_THREAD;
	if (ip_handled || btrs_handled)
		return IRQ_HANDLED;
	return IRQ_NONE;
}