dvalin/kernel/drivers/gpu/arm/midgard/mali_kbase_gpuprops.c

// SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note
/*
 *
 * (C) COPYRIGHT 2011-2021 ARM Limited. All rights reserved.
 *
 * This program is free software and is provided to you under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation, and any use by you of this program is subject to the terms
 * of such GNU license.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you can access it online at
 * http://www.gnu.org/licenses/gpl-2.0.html.
 *
 */

/*
 * Base kernel property query APIs
 */

#include <mali_kbase.h>
#include <gpu/mali_kbase_gpu_regmap.h>
#include <mali_kbase_gpuprops.h>
#include <mali_kbase_hwaccess_gpuprops.h>
#include <mali_kbase_config_defaults.h>
#include <uapi/gpu/arm/midgard/mali_kbase_ioctl.h>
#include <linux/clk.h>
#include <backend/gpu/mali_kbase_pm_internal.h>
#include <linux/of_platform.h>
#include <linux/moduleparam.h>


static void kbase_gpuprops_construct_coherent_groups(
	struct base_gpu_props * const props)
{
	struct mali_base_gpu_coherent_group *current_group;
	u64 group_present;
	u64 group_mask;
	u64 first_set, first_set_prev;
	u32 num_groups = 0;

	KBASE_DEBUG_ASSERT(props != NULL);

	props->coherency_info.coherency = props->raw_props.mem_features;
	props->coherency_info.num_core_groups = hweight64(props->raw_props.l2_present);

	if (props->coherency_info.coherency & GROUPS_L2_COHERENT) {
		/* Group is l2 coherent */
		group_present = props->raw_props.l2_present;
	} else {
		/* Group is l1 coherent */
		group_present = props->raw_props.shader_present;
	}

	/*
	 * The coherent group mask can be computed from the l2 present
	 * register.
	 *
	 * For the coherent group n:
	 * group_mask[n] = (first_set[n] - 1) & ~(first_set[n-1] - 1)
	 * where first_set is group_present with only its nth set-bit kept
	 * (i.e. the position from where a new group starts).
	 *
	 * For instance if the groups are l2 coherent and l2_present=0x0..01111:
	 * The first mask is:
	 * group_mask[1] = (first_set[1] - 1) & ~(first_set[0] - 1)
	 *               = (0x0..010     - 1) & ~(0x0..01      - 1)
	 *               =  0x0..00f
	 * The second mask is:
	 * group_mask[2] = (first_set[2] - 1) & ~(first_set[1] - 1)
	 *               = (0x0..100     - 1) & ~(0x0..010     - 1)
	 *               =  0x0..0f0
	 * And so on until all the bits from group_present have been cleared
	 * (i.e. there is no group left).
	 */

	current_group = props->coherency_info.group;
	first_set = group_present & ~(group_present - 1);

	while (group_present != 0 && num_groups < BASE_MAX_COHERENT_GROUPS) {
		group_present -= first_set;	/* Clear the current group bit */
		first_set_prev = first_set;

		first_set = group_present & ~(group_present - 1);
		group_mask = (first_set - 1) & ~(first_set_prev - 1);

		/* Populate the coherent_group structure for each group */
		current_group->core_mask = group_mask & props->raw_props.shader_present;
		current_group->num_cores = hweight64(current_group->core_mask);

		num_groups++;
		current_group++;
	}

	if (group_present != 0)
		pr_warn("Too many coherent groups (keeping only %d groups).\n", BASE_MAX_COHERENT_GROUPS);

	props->coherency_info.num_groups = num_groups;
}

/**
 * kbase_gpuprops_get_curr_config_props - Get the current allocated resources
 * @kbdev:       The &struct kbase_device structure for the device
 * @curr_config: The &struct curr_config_props structure to receive the result
 *
 * Fill the &struct curr_config_props structure with values from the GPU
 * configuration registers.
 *
 * Return: Zero on success, Linux error code on failure
 */
int kbase_gpuprops_get_curr_config_props(struct kbase_device *kbdev,
	struct curr_config_props * const curr_config)
{
	struct kbase_current_config_regdump curr_config_regdump;
	int err;

	if (WARN_ON(!kbdev) || WARN_ON(!curr_config))
		return -EINVAL;

	/* If update not needed just return. */
	if (!curr_config->update_needed)
		return 0;

	/* Dump relevant registers */
	err = kbase_backend_gpuprops_get_curr_config(kbdev,
						     &curr_config_regdump);
	if (err)
		return err;

	curr_config->l2_slices =
		KBASE_UBFX32(curr_config_regdump.mem_features, 8U, 4) + 1;

	curr_config->l2_present =
		((u64) curr_config_regdump.l2_present_hi << 32) +
		curr_config_regdump.l2_present_lo;

	curr_config->shader_present =
		((u64) curr_config_regdump.shader_present_hi << 32) +
		curr_config_regdump.shader_present_lo;

	curr_config->num_cores = hweight64(curr_config->shader_present);

	curr_config->update_needed = false;

	return 0;
}

/**
 * kbase_gpuprops_req_curr_config_update - Request Current Config Update
 * @kbdev: The &struct kbase_device structure for the device
 *
 * Requests the current configuration to be updated next time the
 * kbase_gpuprops_get_curr_config_props() is called.
 *
 * Return: Zero on success, Linux error code on failure
 */
int kbase_gpuprops_req_curr_config_update(struct kbase_device *kbdev)
{
	if (WARN_ON(!kbdev))
		return -EINVAL;

	kbdev->gpu_props.curr_config.update_needed = true;
	return 0;
}

/**
 * kbase_gpuprops_get_props - Get the GPU configuration
 * @gpu_props: The &struct base_gpu_props structure
 * @kbdev: The &struct kbase_device structure for the device
 *
 * Fill the &struct base_gpu_props structure with values from the GPU
 * configuration registers. Only the raw properties are filled in this function.
 *
 * Return: Zero on success, Linux error code on failure
 */
static int kbase_gpuprops_get_props(struct base_gpu_props * const gpu_props,
	struct kbase_device *kbdev)
{
	struct kbase_gpuprops_regdump regdump;
	int i;
	int err;

	KBASE_DEBUG_ASSERT(kbdev != NULL);
	KBASE_DEBUG_ASSERT(gpu_props != NULL);

	/* Dump relevant registers */
	err = kbase_backend_gpuprops_get(kbdev, &regdump);
	if (err)
		return err;

	gpu_props->raw_props.gpu_id = regdump.gpu_id;
	gpu_props->raw_props.tiler_features = regdump.tiler_features;
	gpu_props->raw_props.mem_features = regdump.mem_features;
	gpu_props->raw_props.mmu_features = regdump.mmu_features;
	gpu_props->raw_props.l2_features = regdump.l2_features;
	gpu_props->raw_props.core_features = regdump.core_features;

	gpu_props->raw_props.as_present = regdump.as_present;
	gpu_props->raw_props.js_present = regdump.js_present;
	gpu_props->raw_props.shader_present =
		((u64) regdump.shader_present_hi << 32) +
		regdump.shader_present_lo;
	gpu_props->raw_props.tiler_present =
		((u64) regdump.tiler_present_hi << 32) +
		regdump.tiler_present_lo;
	gpu_props->raw_props.l2_present =
		((u64) regdump.l2_present_hi << 32) +
		regdump.l2_present_lo;
	gpu_props->raw_props.stack_present =
		((u64) regdump.stack_present_hi << 32) +
		regdump.stack_present_lo;

	for (i = 0; i < GPU_MAX_JOB_SLOTS; i++)
		gpu_props->raw_props.js_features[i] = regdump.js_features[i];

	for (i = 0; i < BASE_GPU_NUM_TEXTURE_FEATURES_REGISTERS; i++)
		gpu_props->raw_props.texture_features[i] = regdump.texture_features[i];

	gpu_props->raw_props.thread_max_barrier_size = regdump.thread_max_barrier_size;
	gpu_props->raw_props.thread_max_threads = regdump.thread_max_threads;
	gpu_props->raw_props.thread_max_workgroup_size = regdump.thread_max_workgroup_size;
	gpu_props->raw_props.thread_features = regdump.thread_features;
	gpu_props->raw_props.thread_tls_alloc = regdump.thread_tls_alloc;

	gpu_props->raw_props.gpu_features =
		((u64) regdump.gpu_features_hi << 32) +
		regdump.gpu_features_lo;

	return 0;
}

void kbase_gpuprops_update_core_props_gpu_id(
	struct base_gpu_props * const gpu_props)
{
	gpu_props->core_props.version_status =
		KBASE_UBFX32(gpu_props->raw_props.gpu_id, 0U, 4);
	gpu_props->core_props.minor_revision =
		KBASE_UBFX32(gpu_props->raw_props.gpu_id, 4U, 8);
	gpu_props->core_props.major_revision =
		KBASE_UBFX32(gpu_props->raw_props.gpu_id, 12U, 4);
	gpu_props->core_props.product_id =
		KBASE_UBFX32(gpu_props->raw_props.gpu_id, 16U, 16);
}

/**
 * kbase_gpuprops_update_max_config_props - Updates the max config properties in
 * the base_gpu_props.
 * @base_props: The &struct base_gpu_props structure
 * @kbdev:      The &struct kbase_device structure for the device
 *
 * Updates the &struct base_gpu_props structure with the max config properties.
 */
static void kbase_gpuprops_update_max_config_props(
	struct base_gpu_props * const base_props, struct kbase_device *kbdev)
{
	int l2_n = 0;

	if (WARN_ON(!kbdev) || WARN_ON(!base_props))
		return;

	/* return if the max_config is not set during arbif initialization */
	if (kbdev->gpu_props.max_config.core_mask == 0)
		return;

	/*
	 * Set the base_props with the maximum config values to ensure that the
	 * user space will always be based on the maximum resources available.
	 */
	base_props->l2_props.num_l2_slices =
		kbdev->gpu_props.max_config.l2_slices;
	base_props->raw_props.shader_present =
		kbdev->gpu_props.max_config.core_mask;
	/*
	 * Update l2_present in the raw data to be consistent with the
	 * max_config.l2_slices number.
	 */
	base_props->raw_props.l2_present = 0;
	for (l2_n = 0; l2_n < base_props->l2_props.num_l2_slices; l2_n++) {
		base_props->raw_props.l2_present <<= 1;
		base_props->raw_props.l2_present |= 0x1;
	}
	/*
	 * Update the coherency_info data using just one core group. For
	 * architectures where the max_config is provided by the arbiter it is
	 * not necessary to split the shader core groups in different coherent
	 * groups.
	 */
	base_props->coherency_info.coherency =
		base_props->raw_props.mem_features;
	base_props->coherency_info.num_core_groups = 1;
	base_props->coherency_info.num_groups = 1;
	base_props->coherency_info.group[0].core_mask =
		kbdev->gpu_props.max_config.core_mask;
	base_props->coherency_info.group[0].num_cores =
		hweight32(kbdev->gpu_props.max_config.core_mask);
}

/**
 * kbase_gpuprops_calculate_props - Calculate the derived properties
 * @gpu_props: The &struct base_gpu_props structure
 * @kbdev:     The &struct kbase_device structure for the device
 *
 * Fill the &struct base_gpu_props structure with values derived from the GPU
 * configuration registers
 */
static void kbase_gpuprops_calculate_props(
	struct base_gpu_props * const gpu_props, struct kbase_device *kbdev)
{
	int i;
	u32 gpu_id;

	/* Populate the base_gpu_props structure */
	kbase_gpuprops_update_core_props_gpu_id(gpu_props);
	gpu_props->core_props.log2_program_counter_size = KBASE_GPU_PC_SIZE_LOG2;
#if KERNEL_VERSION(5, 0, 0) > LINUX_VERSION_CODE
	gpu_props->core_props.gpu_available_memory_size = totalram_pages << PAGE_SHIFT;
#else
	gpu_props->core_props.gpu_available_memory_size =
		totalram_pages() << PAGE_SHIFT;
#endif

	gpu_props->core_props.num_exec_engines =
		KBASE_UBFX32(gpu_props->raw_props.core_features, 0, 4);

	for (i = 0; i < BASE_GPU_NUM_TEXTURE_FEATURES_REGISTERS; i++)
		gpu_props->core_props.texture_features[i] = gpu_props->raw_props.texture_features[i];

	gpu_props->l2_props.log2_line_size = KBASE_UBFX32(gpu_props->raw_props.l2_features, 0U, 8);
	gpu_props->l2_props.log2_cache_size = KBASE_UBFX32(gpu_props->raw_props.l2_features, 16U, 8);

	/* Field with number of l2 slices is added to MEM_FEATURES register
	 * since t76x. Below code assumes that for older GPU reserved bits will
	 * be read as zero.
	 */
	gpu_props->l2_props.num_l2_slices =
		KBASE_UBFX32(gpu_props->raw_props.mem_features, 8U, 4) + 1;

	gpu_props->tiler_props.bin_size_bytes = 1 << KBASE_UBFX32(gpu_props->raw_props.tiler_features, 0U, 6);
	gpu_props->tiler_props.max_active_levels = KBASE_UBFX32(gpu_props->raw_props.tiler_features, 8U, 4);

	if (gpu_props->raw_props.thread_max_threads == 0)
		gpu_props->thread_props.max_threads = THREAD_MT_DEFAULT;
	else
		gpu_props->thread_props.max_threads = gpu_props->raw_props.thread_max_threads;

	if (gpu_props->raw_props.thread_max_workgroup_size == 0)
		gpu_props->thread_props.max_workgroup_size = THREAD_MWS_DEFAULT;
	else
		gpu_props->thread_props.max_workgroup_size = gpu_props->raw_props.thread_max_workgroup_size;

	if (gpu_props->raw_props.thread_max_barrier_size == 0)
		gpu_props->thread_props.max_barrier_size = THREAD_MBS_DEFAULT;
	else
		gpu_props->thread_props.max_barrier_size = gpu_props->raw_props.thread_max_barrier_size;

	if (gpu_props->raw_props.thread_tls_alloc == 0)
		gpu_props->thread_props.tls_alloc =
				gpu_props->thread_props.max_threads;
	else
		gpu_props->thread_props.tls_alloc =
				gpu_props->raw_props.thread_tls_alloc;

	/* MIDHARC-2364 was intended for tULx.
	 * Workaround for the incorrectly applied THREAD_FEATURES to tDUx.
	 */
	gpu_id = kbdev->gpu_props.props.raw_props.gpu_id;

#if MALI_USE_CSF
	gpu_props->thread_props.max_registers =
		KBASE_UBFX32(gpu_props->raw_props.thread_features,
			     0U, 22);
	gpu_props->thread_props.impl_tech =
		KBASE_UBFX32(gpu_props->raw_props.thread_features,
			     22U, 2);
	gpu_props->thread_props.max_task_queue =
		KBASE_UBFX32(gpu_props->raw_props.thread_features,
			     24U, 8);
	gpu_props->thread_props.max_thread_group_split = 0;
#else
	if ((gpu_id & GPU_ID2_PRODUCT_MODEL) == GPU_ID2_PRODUCT_TDUX) {
		gpu_props->thread_props.max_registers =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     0U, 22);
		gpu_props->thread_props.impl_tech =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     22U, 2);
		gpu_props->thread_props.max_task_queue =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     24U, 8);
		gpu_props->thread_props.max_thread_group_split = 0;
	} else {
		gpu_props->thread_props.max_registers =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     0U, 16);
		gpu_props->thread_props.max_task_queue =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     16U, 8);
		gpu_props->thread_props.max_thread_group_split =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     24U, 6);
		gpu_props->thread_props.impl_tech =
			KBASE_UBFX32(gpu_props->raw_props.thread_features,
				     30U, 2);
	}
#endif

	/* If values are not specified, then use defaults */
	if (gpu_props->thread_props.max_registers == 0) {
		gpu_props->thread_props.max_registers = THREAD_MR_DEFAULT;
		gpu_props->thread_props.max_task_queue = THREAD_MTQ_DEFAULT;
		gpu_props->thread_props.max_thread_group_split = THREAD_MTGS_DEFAULT;
	}

	/*
	 * If the maximum resources allocated information is available it is
	 * necessary to update the base_gpu_props with the max_config info to
	 * the userspace. This is applicable to systems that receive this
	 * information from the arbiter.
	 */
	if (kbdev->gpu_props.max_config.core_mask)
		/* Update the max config properties in the base_gpu_props */
		kbase_gpuprops_update_max_config_props(gpu_props,
						       kbdev);
	else
		/* Initialize the coherent_group structure for each group */
		kbase_gpuprops_construct_coherent_groups(gpu_props);
}

void kbase_gpuprops_set_max_config(struct kbase_device *kbdev,
	const struct max_config_props *max_config)
{
	if (WARN_ON(!kbdev) || WARN_ON(!max_config))
		return;

	kbdev->gpu_props.max_config.l2_slices = max_config->l2_slices;
	kbdev->gpu_props.max_config.core_mask = max_config->core_mask;
}

void kbase_gpuprops_set(struct kbase_device *kbdev)
{
	struct kbase_gpu_props *gpu_props;
	struct gpu_raw_gpu_props *raw;

	if (WARN_ON(!kbdev))
		return;
	gpu_props = &kbdev->gpu_props;
	raw = &gpu_props->props.raw_props;

	/* Initialize the base_gpu_props structure from the hardware */
	kbase_gpuprops_get_props(&gpu_props->props, kbdev);

	/* Populate the derived properties */
	kbase_gpuprops_calculate_props(&gpu_props->props, kbdev);

	/* Populate kbase-only fields */
	gpu_props->l2_props.associativity = KBASE_UBFX32(raw->l2_features, 8U, 8);
	gpu_props->l2_props.external_bus_width = KBASE_UBFX32(raw->l2_features, 24U, 8);

	gpu_props->mem.core_group = KBASE_UBFX32(raw->mem_features, 0U, 1);

	gpu_props->mmu.va_bits = KBASE_UBFX32(raw->mmu_features, 0U, 8);
	gpu_props->mmu.pa_bits = KBASE_UBFX32(raw->mmu_features, 8U, 8);

	gpu_props->num_cores = hweight64(raw->shader_present);
	gpu_props->num_core_groups =
		gpu_props->props.coherency_info.num_core_groups;
	gpu_props->num_address_spaces = hweight32(raw->as_present);
	gpu_props->num_job_slots = hweight32(raw->js_present);

	/*
	 * Current configuration is used on HW interactions so that the maximum
	 * config is just used for user space avoiding interactions with parts
	 * of the hardware that might not be allocated to the kbase instance at
	 * that moment.
	 */
	kbase_gpuprops_req_curr_config_update(kbdev);
	kbase_gpuprops_get_curr_config_props(kbdev, &gpu_props->curr_config);
}

int kbase_gpuprops_set_features(struct kbase_device *kbdev)
{
	struct base_gpu_props *gpu_props;
	struct kbase_gpuprops_regdump regdump;
	int err;

	gpu_props = &kbdev->gpu_props.props;

	/* Dump relevant registers */
	err = kbase_backend_gpuprops_get_features(kbdev, &regdump);
	if (err)
		return err;

	/*
	 * Copy the raw value from the register, later this will get turned
	 * into the selected coherency mode.
	 * Additionally, add non-coherent mode, as this is always supported.
	 */
	gpu_props->raw_props.coherency_mode = regdump.coherency_features |
		COHERENCY_FEATURE_BIT(COHERENCY_NONE);

	if (!kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_THREAD_GROUP_SPLIT))
		gpu_props->thread_props.max_thread_group_split = 0;

	return err;
}

/*
 * Module parameters to allow the L2 size and hash configuration to be
 * overridden.
 *
 * These parameters must be set on insmod to take effect, and are not visible
 * in sysfs.
 */
static u8 override_l2_size;
module_param(override_l2_size, byte, 0000);
MODULE_PARM_DESC(override_l2_size, "Override L2 size config for testing");

static u8 override_l2_hash;
module_param(override_l2_hash, byte, 0000);
MODULE_PARM_DESC(override_l2_hash, "Override L2 hash config for testing");

static u32 l2_hash_values[ASN_HASH_COUNT] = {
	0,
};
static int num_override_l2_hash_values;
module_param_array(l2_hash_values, uint, &num_override_l2_hash_values, 0000);
MODULE_PARM_DESC(l2_hash_values, "Override L2 hash values config for testing");

/* Definitions for range of supported user defined hash functions for GPUs
 * that support L2_CONFIG and not ASN_HASH features. Supported hash function
 * range from 0b1000-0b1111 inclusive. Selection of any other values will
 * lead to undefined behavior.
 */
#define USER_DEFINED_HASH_LO ((u8)0x08)
#define USER_DEFINED_HASH_HI ((u8)0x0F)

enum l2_config_override_result {
	L2_CONFIG_OVERRIDE_FAIL = -1,
	L2_CONFIG_OVERRIDE_NONE,
	L2_CONFIG_OVERRIDE_OK,
};

/**
 * kbase_read_l2_config_from_dt - Read L2 configuration
 * @kbdev: The kbase device for which to get the L2 configuration.
 *
 * Check for L2 configuration overrides in module parameters and device tree.
 * Override values in module parameters take priority over override values in
 * device tree.
 *
 * Return: L2_CONFIG_OVERRIDE_OK if either size or hash, or both was properly
 *         overridden, L2_CONFIG_OVERRIDE_NONE if no overrides are provided.
 *         L2_CONFIG_OVERRIDE_FAIL otherwise.
 */
static enum l2_config_override_result
kbase_read_l2_config_from_dt(struct kbase_device *const kbdev)
{
	struct device_node *np = kbdev->dev->of_node;

	if (!np)
		return L2_CONFIG_OVERRIDE_NONE;

	if (override_l2_size)
		kbdev->l2_size_override = override_l2_size;
	else if (of_property_read_u8(np, "l2-size", &kbdev->l2_size_override))
		kbdev->l2_size_override = 0;

	/* Check overriding value is supported, if not will result in
	 * undefined behavior.
	 */
	if (override_l2_hash >= USER_DEFINED_HASH_LO &&
	    override_l2_hash <= USER_DEFINED_HASH_HI)
		kbdev->l2_hash_override = override_l2_hash;
	else if (of_property_read_u8(np, "l2-hash", &kbdev->l2_hash_override))
		kbdev->l2_hash_override = 0;

	kbdev->l2_hash_values_override = false;
	if (num_override_l2_hash_values) {
		int i;

		kbdev->l2_hash_values_override = true;
		for (i = 0; i < num_override_l2_hash_values; i++)
			kbdev->l2_hash_values[i] = l2_hash_values[i];
	} else if (!of_property_read_u32_array(np, "l2-hash-values",
					       kbdev->l2_hash_values,
					       ASN_HASH_COUNT))
		kbdev->l2_hash_values_override = true;

	if (kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_ASN_HASH) &&
	    (kbdev->l2_hash_override)) {
		dev_err(kbdev->dev, "l2-hash not supported\n");
		return L2_CONFIG_OVERRIDE_FAIL;
	}

	if (!kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_ASN_HASH) &&
	    (kbdev->l2_hash_values_override)) {
		dev_err(kbdev->dev, "l2-hash-values not supported\n");
		return L2_CONFIG_OVERRIDE_FAIL;
	}

	if (kbdev->l2_hash_override && kbdev->l2_hash_values_override) {
		dev_err(kbdev->dev,
			"both l2-hash & l2-hash-values not supported\n");
		return L2_CONFIG_OVERRIDE_FAIL;
	}

	if (kbdev->l2_size_override || kbdev->l2_hash_override ||
	    kbdev->l2_hash_values_override)
		return L2_CONFIG_OVERRIDE_OK;

	return L2_CONFIG_OVERRIDE_NONE;
}

int kbase_gpuprops_update_l2_features(struct kbase_device *kbdev)
{
	int err = 0;

	if (kbase_hw_has_feature(kbdev, BASE_HW_FEATURE_L2_CONFIG)) {
		struct kbase_gpuprops_regdump regdump;
		struct base_gpu_props *gpu_props = &kbdev->gpu_props.props;

		/* Check for L2 cache size & hash overrides */
		switch (kbase_read_l2_config_from_dt(kbdev)) {
		case L2_CONFIG_OVERRIDE_FAIL:
			err = -EIO;
			goto exit;
		case L2_CONFIG_OVERRIDE_NONE:
			goto exit;
		default:
			break;
		}

		/* pm.active_count is expected to be 1 here, which is set in
		 * kbase_hwaccess_pm_powerup().
		 */
		WARN_ON(kbdev->pm.active_count != 1);
		/* The new settings for L2 cache can only be applied when it is
		 * off, so first do the power down.
		 */
		kbase_pm_context_idle(kbdev);
		kbase_pm_wait_for_desired_state(kbdev);

		/* Need L2 to get powered to reflect to L2_FEATURES */
		kbase_pm_context_active(kbdev);

		/* Wait for the completion of L2 power transition */
		kbase_pm_wait_for_l2_powered(kbdev);

		/* Dump L2_FEATURES register */
		err = kbase_backend_gpuprops_get_l2_features(kbdev, &regdump);
		if (err)
			goto exit;

		dev_info(kbdev->dev, "Reflected L2_FEATURES is 0x%x\n",
			 regdump.l2_features);
		dev_info(kbdev->dev, "Reflected L2_CONFIG is 0x%08x\n",
			 regdump.l2_config);


		/* Update gpuprops with reflected L2_FEATURES */
		gpu_props->raw_props.l2_features = regdump.l2_features;
		gpu_props->l2_props.log2_cache_size =
			KBASE_UBFX32(gpu_props->raw_props.l2_features, 16U, 8);
	}

exit:
	return err;
}

static struct {
	u32 type;
	size_t offset;
	int size;
} gpu_property_mapping[] = {
#define PROP(name, member) \
	{KBASE_GPUPROP_ ## name, offsetof(struct base_gpu_props, member), \
		sizeof(((struct base_gpu_props *)0)->member)}
	PROP(PRODUCT_ID,                  core_props.product_id),
	PROP(VERSION_STATUS,              core_props.version_status),
	PROP(MINOR_REVISION,              core_props.minor_revision),
	PROP(MAJOR_REVISION,              core_props.major_revision),
	PROP(GPU_FREQ_KHZ_MAX,            core_props.gpu_freq_khz_max),
	PROP(LOG2_PROGRAM_COUNTER_SIZE,   core_props.log2_program_counter_size),
	PROP(TEXTURE_FEATURES_0,          core_props.texture_features[0]),
	PROP(TEXTURE_FEATURES_1,          core_props.texture_features[1]),
	PROP(TEXTURE_FEATURES_2,          core_props.texture_features[2]),
	PROP(TEXTURE_FEATURES_3,          core_props.texture_features[3]),
	PROP(GPU_AVAILABLE_MEMORY_SIZE,   core_props.gpu_available_memory_size),
	PROP(NUM_EXEC_ENGINES,            core_props.num_exec_engines),

	PROP(L2_LOG2_LINE_SIZE,           l2_props.log2_line_size),
	PROP(L2_LOG2_CACHE_SIZE,          l2_props.log2_cache_size),
	PROP(L2_NUM_L2_SLICES,            l2_props.num_l2_slices),

	PROP(TILER_BIN_SIZE_BYTES,        tiler_props.bin_size_bytes),
	PROP(TILER_MAX_ACTIVE_LEVELS,     tiler_props.max_active_levels),

	PROP(MAX_THREADS,                 thread_props.max_threads),
	PROP(MAX_WORKGROUP_SIZE,          thread_props.max_workgroup_size),
	PROP(MAX_BARRIER_SIZE,            thread_props.max_barrier_size),
	PROP(MAX_REGISTERS,               thread_props.max_registers),
	PROP(MAX_TASK_QUEUE,              thread_props.max_task_queue),
	PROP(MAX_THREAD_GROUP_SPLIT,      thread_props.max_thread_group_split),
	PROP(IMPL_TECH,                   thread_props.impl_tech),
	PROP(TLS_ALLOC,                   thread_props.tls_alloc),

	PROP(RAW_SHADER_PRESENT,          raw_props.shader_present),
	PROP(RAW_TILER_PRESENT,           raw_props.tiler_present),
	PROP(RAW_L2_PRESENT,              raw_props.l2_present),
	PROP(RAW_STACK_PRESENT,           raw_props.stack_present),
	PROP(RAW_L2_FEATURES,             raw_props.l2_features),
	PROP(RAW_CORE_FEATURES,           raw_props.core_features),
	PROP(RAW_MEM_FEATURES,            raw_props.mem_features),
	PROP(RAW_MMU_FEATURES,            raw_props.mmu_features),
	PROP(RAW_AS_PRESENT,              raw_props.as_present),
	PROP(RAW_JS_PRESENT,              raw_props.js_present),
	PROP(RAW_JS_FEATURES_0,           raw_props.js_features[0]),
	PROP(RAW_JS_FEATURES_1,           raw_props.js_features[1]),
	PROP(RAW_JS_FEATURES_2,           raw_props.js_features[2]),
	PROP(RAW_JS_FEATURES_3,           raw_props.js_features[3]),
	PROP(RAW_JS_FEATURES_4,           raw_props.js_features[4]),
	PROP(RAW_JS_FEATURES_5,           raw_props.js_features[5]),
	PROP(RAW_JS_FEATURES_6,           raw_props.js_features[6]),
	PROP(RAW_JS_FEATURES_7,           raw_props.js_features[7]),
	PROP(RAW_JS_FEATURES_8,           raw_props.js_features[8]),
	PROP(RAW_JS_FEATURES_9,           raw_props.js_features[9]),
	PROP(RAW_JS_FEATURES_10,          raw_props.js_features[10]),
	PROP(RAW_JS_FEATURES_11,          raw_props.js_features[11]),
	PROP(RAW_JS_FEATURES_12,          raw_props.js_features[12]),
	PROP(RAW_JS_FEATURES_13,          raw_props.js_features[13]),
	PROP(RAW_JS_FEATURES_14,          raw_props.js_features[14]),
	PROP(RAW_JS_FEATURES_15,          raw_props.js_features[15]),
	PROP(RAW_TILER_FEATURES,          raw_props.tiler_features),
	PROP(RAW_TEXTURE_FEATURES_0,      raw_props.texture_features[0]),
	PROP(RAW_TEXTURE_FEATURES_1,      raw_props.texture_features[1]),
	PROP(RAW_TEXTURE_FEATURES_2,      raw_props.texture_features[2]),
	PROP(RAW_TEXTURE_FEATURES_3,      raw_props.texture_features[3]),
	PROP(RAW_GPU_ID,                  raw_props.gpu_id),
	PROP(RAW_THREAD_MAX_THREADS,      raw_props.thread_max_threads),
	PROP(RAW_THREAD_MAX_WORKGROUP_SIZE,
			raw_props.thread_max_workgroup_size),
	PROP(RAW_THREAD_MAX_BARRIER_SIZE, raw_props.thread_max_barrier_size),
	PROP(RAW_THREAD_FEATURES,         raw_props.thread_features),
	PROP(RAW_THREAD_TLS_ALLOC,        raw_props.thread_tls_alloc),
	PROP(RAW_COHERENCY_MODE,          raw_props.coherency_mode),
	PROP(RAW_GPU_FEATURES,            raw_props.gpu_features),
	PROP(COHERENCY_NUM_GROUPS,        coherency_info.num_groups),
	PROP(COHERENCY_NUM_CORE_GROUPS,   coherency_info.num_core_groups),
	PROP(COHERENCY_COHERENCY,         coherency_info.coherency),
	PROP(COHERENCY_GROUP_0,           coherency_info.group[0].core_mask),
	PROP(COHERENCY_GROUP_1,           coherency_info.group[1].core_mask),
	PROP(COHERENCY_GROUP_2,           coherency_info.group[2].core_mask),
	PROP(COHERENCY_GROUP_3,           coherency_info.group[3].core_mask),
	PROP(COHERENCY_GROUP_4,           coherency_info.group[4].core_mask),
	PROP(COHERENCY_GROUP_5,           coherency_info.group[5].core_mask),
	PROP(COHERENCY_GROUP_6,           coherency_info.group[6].core_mask),
	PROP(COHERENCY_GROUP_7,           coherency_info.group[7].core_mask),
	PROP(COHERENCY_GROUP_8,           coherency_info.group[8].core_mask),
	PROP(COHERENCY_GROUP_9,           coherency_info.group[9].core_mask),
	PROP(COHERENCY_GROUP_10,          coherency_info.group[10].core_mask),
	PROP(COHERENCY_GROUP_11,          coherency_info.group[11].core_mask),
	PROP(COHERENCY_GROUP_12,          coherency_info.group[12].core_mask),
	PROP(COHERENCY_GROUP_13,          coherency_info.group[13].core_mask),
	PROP(COHERENCY_GROUP_14,          coherency_info.group[14].core_mask),
	PROP(COHERENCY_GROUP_15,          coherency_info.group[15].core_mask),

#undef PROP
};

int kbase_gpuprops_populate_user_buffer(struct kbase_device *kbdev)
{
	struct kbase_gpu_props *kprops = &kbdev->gpu_props;
	struct base_gpu_props *props = &kprops->props;
	u32 count = ARRAY_SIZE(gpu_property_mapping);
	u32 i;
	u32 size = 0;
	u8 *p;

	for (i = 0; i < count; i++) {
		/* 4 bytes for the ID, and the size of the property */
		size += 4 + gpu_property_mapping[i].size;
	}

	kprops->prop_buffer_size = size;
	kprops->prop_buffer = kmalloc(size, GFP_KERNEL);

	if (!kprops->prop_buffer) {
		kprops->prop_buffer_size = 0;
		return -ENOMEM;
	}

	p = kprops->prop_buffer;

#define WRITE_U8(v) (*p++ = (v) & 0xFF)
#define WRITE_U16(v) do { WRITE_U8(v); WRITE_U8((v) >> 8); } while (0)
#define WRITE_U32(v) do { WRITE_U16(v); WRITE_U16((v) >> 16); } while (0)
#define WRITE_U64(v) do { WRITE_U32(v); WRITE_U32((v) >> 32); } while (0)

	for (i = 0; i < count; i++) {
		u32 type = gpu_property_mapping[i].type;
		u8 type_size;
		void *field = ((u8 *)props) + gpu_property_mapping[i].offset;

		switch (gpu_property_mapping[i].size) {
		case 1:
			type_size = KBASE_GPUPROP_VALUE_SIZE_U8;
			break;
		case 2:
			type_size = KBASE_GPUPROP_VALUE_SIZE_U16;
			break;
		case 4:
			type_size = KBASE_GPUPROP_VALUE_SIZE_U32;
			break;
		case 8:
			type_size = KBASE_GPUPROP_VALUE_SIZE_U64;
			break;
		default:
			dev_err(kbdev->dev,
				"Invalid gpu_property_mapping type=%d size=%d",
				type, gpu_property_mapping[i].size);
			return -EINVAL;
		}

		WRITE_U32((type<<2) | type_size);

		switch (type_size) {
		case KBASE_GPUPROP_VALUE_SIZE_U8:
			WRITE_U8(*((u8 *)field));
			break;
		case KBASE_GPUPROP_VALUE_SIZE_U16:
			WRITE_U16(*((u16 *)field));
			break;
		case KBASE_GPUPROP_VALUE_SIZE_U32:
			WRITE_U32(*((u32 *)field));
			break;
		case KBASE_GPUPROP_VALUE_SIZE_U64:
			WRITE_U64(*((u64 *)field));
			break;
		default: /* Cannot be reached */
			WARN_ON(1);
			return -EINVAL;
		}
	}

	return 0;
}

void kbase_gpuprops_free_user_buffer(struct kbase_device *kbdev)
{
	kfree(kbdev->gpu_props.prop_buffer);
}

int kbase_device_populate_max_freq(struct kbase_device *kbdev)
{
	struct mali_base_gpu_core_props *core_props;

	/* obtain max configured gpu frequency, if devfreq is enabled then
	 * this will be overridden by the highest operating point found
	 */
	core_props = &(kbdev->gpu_props.props.core_props);
#ifdef GPU_FREQ_KHZ_MAX
	core_props->gpu_freq_khz_max = GPU_FREQ_KHZ_MAX;
#else
	core_props->gpu_freq_khz_max = DEFAULT_GPU_FREQ_KHZ_MAX;
#endif

	return 0;
}