drivers/soc/qcom/llcc-slice.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
  *
  */

 #include <linux/bitmap.h>
 #include <linux/bitops.h>
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of_device.h>
 #include <linux/regmap.h>
 #include <linux/sizes.h>
 #include <linux/slab.h>
 #include <linux/soc/qcom/llcc-qcom.h>

 #define ACTIVATE                      BIT(0)
 #define DEACTIVATE                    BIT(1)
 #define ACT_CTRL_OPCODE_ACTIVATE      BIT(0)
 #define ACT_CTRL_OPCODE_DEACTIVATE    BIT(1)
 #define ACT_CTRL_ACT_TRIG             BIT(0)
 #define ACT_CTRL_OPCODE_SHIFT         0x01
 #define ATTR1_PROBE_TARGET_WAYS_SHIFT 0x02
 #define ATTR1_FIXED_SIZE_SHIFT        0x03
 #define ATTR1_PRIORITY_SHIFT          0x04
 #define ATTR1_MAX_CAP_SHIFT           0x10
 #define ATTR0_RES_WAYS_MASK           GENMASK(11, 0)
 #define ATTR0_BONUS_WAYS_MASK         GENMASK(27, 16)
 #define ATTR0_BONUS_WAYS_SHIFT        0x10
 #define LLCC_STATUS_READ_DELAY        100

 #define CACHE_LINE_SIZE_SHIFT         6

 #define LLCC_COMMON_STATUS0           0x0003000c
 #define LLCC_LB_CNT_MASK              GENMASK(31, 28)
 #define LLCC_LB_CNT_SHIFT             28

 #define MAX_CAP_TO_BYTES(n)           (n * SZ_1K)
 #define LLCC_TRP_ACT_CTRLn(n)         (n * SZ_4K)
 #define LLCC_TRP_STATUSn(n)           (4 + n * SZ_4K)
 #define LLCC_TRP_ATTR0_CFGn(n)        (0x21000 + SZ_8 * n)
 #define LLCC_TRP_ATTR1_CFGn(n)        (0x21004 + SZ_8 * n)

 #define BANK_OFFSET_STRIDE	      0x80000

 static struct llcc_drv_data *drv_data = (void *) -EPROBE_DEFER;

 static const struct regmap_config llcc_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
 	.fast_io = true,
 };

 /**
  * llcc_slice_getd - get llcc slice descriptor
  * @uid: usecase_id for the client
  *
  * A pointer to llcc slice descriptor will be returned on success and
  * and error pointer is returned on failure
  */
 struct llcc_slice_desc *llcc_slice_getd(u32 uid)
 {
 	const struct llcc_slice_config *cfg;
 	struct llcc_slice_desc *desc;
 	u32 sz, count;

 	if (IS_ERR(drv_data))
 		return ERR_CAST(drv_data);

 	cfg = drv_data->cfg;
 	sz = drv_data->cfg_size;

 	for (count = 0; cfg && count < sz; count++, cfg++)
 		if (cfg->usecase_id == uid)
 			break;

 	if (count == sz || !cfg)
 		return ERR_PTR(-ENODEV);

 	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
 	if (!desc)
 		return ERR_PTR(-ENOMEM);

 	desc->slice_id = cfg->slice_id;
 	desc->slice_size = cfg->max_cap;

 	return desc;
 }
 EXPORT_SYMBOL_GPL(llcc_slice_getd);

 /**
  * llcc_slice_putd - llcc slice descritpor
  * @desc: Pointer to llcc slice descriptor
  */
 void llcc_slice_putd(struct llcc_slice_desc *desc)
 {
 	if (!IS_ERR_OR_NULL(desc))
 		kfree(desc);
 }
 EXPORT_SYMBOL_GPL(llcc_slice_putd);

 static int llcc_update_act_ctrl(u32 sid,
 				u32 act_ctrl_reg_val, u32 status)
 {
 	u32 act_ctrl_reg;
 	u32 status_reg;
 	u32 slice_status;
 	int ret;

 	if (IS_ERR(drv_data))
 		return PTR_ERR(drv_data);

 	act_ctrl_reg = LLCC_TRP_ACT_CTRLn(sid);
 	status_reg = LLCC_TRP_STATUSn(sid);

 	/* Set the ACTIVE trigger */
 	act_ctrl_reg_val |= ACT_CTRL_ACT_TRIG;
 	ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg,
 				act_ctrl_reg_val);
 	if (ret)
 		return ret;

 	/* Clear the ACTIVE trigger */
 	act_ctrl_reg_val &= ~ACT_CTRL_ACT_TRIG;
 	ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg,
 				act_ctrl_reg_val);
 	if (ret)
 		return ret;

 	ret = regmap_read_poll_timeout(drv_data->bcast_regmap, status_reg,
 				      slice_status, !(slice_status & status),
 				      0, LLCC_STATUS_READ_DELAY);
 	return ret;
 }

 /**
  * llcc_slice_activate - Activate the llcc slice
  * @desc: Pointer to llcc slice descriptor
  *
  * A value of zero will be returned on success and a negative errno will
  * be returned in error cases
  */
 int llcc_slice_activate(struct llcc_slice_desc *desc)
 {
 	int ret;
 	u32 act_ctrl_val;

 	if (IS_ERR(drv_data))
 		return PTR_ERR(drv_data);

 	if (IS_ERR_OR_NULL(desc))
 		return -EINVAL;

 	mutex_lock(&drv_data->lock);
 	if (test_bit(desc->slice_id, drv_data->bitmap)) {
 		mutex_unlock(&drv_data->lock);
 		return 0;
 	}

 	act_ctrl_val = ACT_CTRL_OPCODE_ACTIVATE << ACT_CTRL_OPCODE_SHIFT;

 	ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val,
 				  DEACTIVATE);
 	if (ret) {
 		mutex_unlock(&drv_data->lock);
 		return ret;
 	}

 	__set_bit(desc->slice_id, drv_data->bitmap);
 	mutex_unlock(&drv_data->lock);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(llcc_slice_activate);

 /**
  * llcc_slice_deactivate - Deactivate the llcc slice
  * @desc: Pointer to llcc slice descriptor
  *
  * A value of zero will be returned on success and a negative errno will
  * be returned in error cases
  */
 int llcc_slice_deactivate(struct llcc_slice_desc *desc)
 {
 	u32 act_ctrl_val;
 	int ret;

 	if (IS_ERR(drv_data))
 		return PTR_ERR(drv_data);

 	if (IS_ERR_OR_NULL(desc))
 		return -EINVAL;

 	mutex_lock(&drv_data->lock);
 	if (!test_bit(desc->slice_id, drv_data->bitmap)) {
 		mutex_unlock(&drv_data->lock);
 		return 0;
 	}
 	act_ctrl_val = ACT_CTRL_OPCODE_DEACTIVATE << ACT_CTRL_OPCODE_SHIFT;

 	ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val,
 				  ACTIVATE);
 	if (ret) {
 		mutex_unlock(&drv_data->lock);
 		return ret;
 	}

 	__clear_bit(desc->slice_id, drv_data->bitmap);
 	mutex_unlock(&drv_data->lock);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(llcc_slice_deactivate);

 /**
  * llcc_get_slice_id - return the slice id
  * @desc: Pointer to llcc slice descriptor
  */
 int llcc_get_slice_id(struct llcc_slice_desc *desc)
 {
 	if (IS_ERR_OR_NULL(desc))
 		return -EINVAL;

 	return desc->slice_id;
 }
 EXPORT_SYMBOL_GPL(llcc_get_slice_id);

 /**
  * llcc_get_slice_size - return the slice id
  * @desc: Pointer to llcc slice descriptor
  */
 size_t llcc_get_slice_size(struct llcc_slice_desc *desc)
 {
 	if (IS_ERR_OR_NULL(desc))
 		return 0;

 	return desc->slice_size;
 }
 EXPORT_SYMBOL_GPL(llcc_get_slice_size);

 static int qcom_llcc_cfg_program(struct platform_device *pdev)
 {
 	int i;
 	u32 attr1_cfg;
 	u32 attr0_cfg;
 	u32 attr1_val;
 	u32 attr0_val;
 	u32 max_cap_cacheline;
 	u32 sz;
 	int ret = 0;
 	const struct llcc_slice_config *llcc_table;
 	struct llcc_slice_desc desc;

 	sz = drv_data->cfg_size;
 	llcc_table = drv_data->cfg;

 	for (i = 0; i < sz; i++) {
 		attr1_cfg = LLCC_TRP_ATTR1_CFGn(llcc_table[i].slice_id);
 		attr0_cfg = LLCC_TRP_ATTR0_CFGn(llcc_table[i].slice_id);

 		attr1_val = llcc_table[i].cache_mode;
 		attr1_val |= llcc_table[i].probe_target_ways <<
 				ATTR1_PROBE_TARGET_WAYS_SHIFT;
 		attr1_val |= llcc_table[i].fixed_size <<
 				ATTR1_FIXED_SIZE_SHIFT;
 		attr1_val |= llcc_table[i].priority <<
 				ATTR1_PRIORITY_SHIFT;

 		max_cap_cacheline = MAX_CAP_TO_BYTES(llcc_table[i].max_cap);

 		/* LLCC instances can vary for each target.
 		 * The SW writes to broadcast register which gets propagated
 		 * to each llcc instace (llcc0,.. llccN).
 		 * Since the size of the memory is divided equally amongst the
 		 * llcc instances, we need to configure the max cap accordingly.
 		 */
 		max_cap_cacheline = max_cap_cacheline / drv_data->num_banks;
 		max_cap_cacheline >>= CACHE_LINE_SIZE_SHIFT;
 		attr1_val |= max_cap_cacheline << ATTR1_MAX_CAP_SHIFT;

 		attr0_val = llcc_table[i].res_ways & ATTR0_RES_WAYS_MASK;
 		attr0_val |= llcc_table[i].bonus_ways << ATTR0_BONUS_WAYS_SHIFT;

 		ret = regmap_write(drv_data->bcast_regmap, attr1_cfg,
 					attr1_val);
 		if (ret)
 			return ret;
 		ret = regmap_write(drv_data->bcast_regmap, attr0_cfg,
 					attr0_val);
 		if (ret)
 			return ret;
 		if (llcc_table[i].activate_on_init) {
 			desc.slice_id = llcc_table[i].slice_id;
 			ret = llcc_slice_activate(&desc);
 		}
 	}
 	return ret;
 }

 int qcom_llcc_remove(struct platform_device *pdev)
 {
 	/* Set the global pointer to a error code to avoid referencing it */
 	drv_data = ERR_PTR(-ENODEV);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(qcom_llcc_remove);

 static struct regmap *qcom_llcc_init_mmio(struct platform_device *pdev,
 		const char *name)
 {
 	struct resource *res;
 	void __iomem *base;

 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
 	if (!res)
 		return ERR_PTR(-ENODEV);

 	base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(base))
 		return ERR_CAST(base);

 	return devm_regmap_init_mmio(&pdev->dev, base, &llcc_regmap_config);
 }

 int qcom_llcc_probe(struct platform_device *pdev,
 		      const struct llcc_slice_config *llcc_cfg, u32 sz)
 {
 	u32 num_banks;
 	struct device *dev = &pdev->dev;
 	int ret, i;
 	struct platform_device *llcc_edac;

 	drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
 	if (!drv_data) {
 		ret = -ENOMEM;
 		goto err;
 	}

 	drv_data->regmap = qcom_llcc_init_mmio(pdev, "llcc_base");
 	if (IS_ERR(drv_data->regmap)) {
 		ret = PTR_ERR(drv_data->regmap);
 		goto err;
 	}

 	drv_data->bcast_regmap =
 		qcom_llcc_init_mmio(pdev, "llcc_broadcast_base");
 	if (IS_ERR(drv_data->bcast_regmap)) {
 		ret = PTR_ERR(drv_data->bcast_regmap);
 		goto err;
 	}

 	ret = regmap_read(drv_data->regmap, LLCC_COMMON_STATUS0,
 						&num_banks);
 	if (ret)
 		goto err;

 	num_banks &= LLCC_LB_CNT_MASK;
 	num_banks >>= LLCC_LB_CNT_SHIFT;
 	drv_data->num_banks = num_banks;

 	for (i = 0; i < sz; i++)
 		if (llcc_cfg[i].slice_id > drv_data->max_slices)
 			drv_data->max_slices = llcc_cfg[i].slice_id;

 	drv_data->offsets = devm_kcalloc(dev, num_banks, sizeof(u32),
 							GFP_KERNEL);
 	if (!drv_data->offsets) {
 		ret = -ENOMEM;
 		goto err;
 	}

 	for (i = 0; i < num_banks; i++)
 		drv_data->offsets[i] = i * BANK_OFFSET_STRIDE;

 	drv_data->bitmap = devm_kcalloc(dev,
 	BITS_TO_LONGS(drv_data->max_slices), sizeof(unsigned long),
 						GFP_KERNEL);
 	if (!drv_data->bitmap) {
 		ret = -ENOMEM;
 		goto err;
 	}

 	drv_data->cfg = llcc_cfg;
 	drv_data->cfg_size = sz;
 	mutex_init(&drv_data->lock);
 	platform_set_drvdata(pdev, drv_data);

 	ret = qcom_llcc_cfg_program(pdev);
 	if (ret)
 		goto err;

 	drv_data->ecc_irq = platform_get_irq(pdev, 0);
 	if (drv_data->ecc_irq >= 0) {
 		llcc_edac = platform_device_register_data(&pdev->dev,
 						"qcom_llcc_edac", -1, drv_data,
 						sizeof(*drv_data));
 		if (IS_ERR(llcc_edac))
 			dev_err(dev, "Failed to register llcc edac driver\n");
 	}

 	return 0;
 err:
 	drv_data = ERR_PTR(-ENODEV);
 	return ret;
 }
 EXPORT_SYMBOL_GPL(qcom_llcc_probe);
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("Qualcomm Last Level Cache Controller");
	// SPDX-License-Identifier: GPL-2.0
	/*
	* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
	*
	*/

	#include <linux/bitmap.h>
	#include <linux/bitops.h>
	#include <linux/device.h>
	#include <linux/io.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/mutex.h>
	#include <linux/of_device.h>
	#include <linux/regmap.h>
	#include <linux/sizes.h>
	#include <linux/slab.h>
	#include <linux/soc/qcom/llcc-qcom.h>

	#define ACTIVATE BIT(0)
	#define DEACTIVATE BIT(1)
	#define ACT_CTRL_OPCODE_ACTIVATE BIT(0)
	#define ACT_CTRL_OPCODE_DEACTIVATE BIT(1)
	#define ACT_CTRL_ACT_TRIG BIT(0)
	#define ACT_CTRL_OPCODE_SHIFT 0x01
	#define ATTR1_PROBE_TARGET_WAYS_SHIFT 0x02
	#define ATTR1_FIXED_SIZE_SHIFT 0x03
	#define ATTR1_PRIORITY_SHIFT 0x04
	#define ATTR1_MAX_CAP_SHIFT 0x10
	#define ATTR0_RES_WAYS_MASK GENMASK(11, 0)
	#define ATTR0_BONUS_WAYS_MASK GENMASK(27, 16)
	#define ATTR0_BONUS_WAYS_SHIFT 0x10
	#define LLCC_STATUS_READ_DELAY 100

	#define CACHE_LINE_SIZE_SHIFT 6

	#define LLCC_COMMON_STATUS0 0x0003000c
	#define LLCC_LB_CNT_MASK GENMASK(31, 28)
	#define LLCC_LB_CNT_SHIFT 28

	#define MAX_CAP_TO_BYTES(n) (n * SZ_1K)
	#define LLCC_TRP_ACT_CTRLn(n) (n * SZ_4K)
	#define LLCC_TRP_STATUSn(n) (4 + n * SZ_4K)
	#define LLCC_TRP_ATTR0_CFGn(n) (0x21000 + SZ_8 * n)
	#define LLCC_TRP_ATTR1_CFGn(n) (0x21004 + SZ_8 * n)

	#define BANK_OFFSET_STRIDE 0x80000

	static struct llcc_drv_data drv_data = (void ) -EPROBE_DEFER;

	static const struct regmap_config llcc_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.fast_io = true,
	};

	/**
	* llcc_slice_getd - get llcc slice descriptor
	* @uid: usecase_id for the client
	*
	* A pointer to llcc slice descriptor will be returned on success and
	* and error pointer is returned on failure
	*/
	struct llcc_slice_desc *llcc_slice_getd(u32 uid)
	{
	const struct llcc_slice_config *cfg;
	struct llcc_slice_desc *desc;
	u32 sz, count;

	if (IS_ERR(drv_data))
	return ERR_CAST(drv_data);

	cfg = drv_data->cfg;
	sz = drv_data->cfg_size;

	for (count = 0; cfg && count < sz; count++, cfg++)
	if (cfg->usecase_id == uid)
	break;

	if (count == sz \|\| !cfg)
	return ERR_PTR(-ENODEV);

	desc = kzalloc(sizeof(*desc), GFP_KERNEL);
	if (!desc)
	return ERR_PTR(-ENOMEM);

	desc->slice_id = cfg->slice_id;
	desc->slice_size = cfg->max_cap;

	return desc;
	}
	EXPORT_SYMBOL_GPL(llcc_slice_getd);

	/**
	* llcc_slice_putd - llcc slice descritpor
	* @desc: Pointer to llcc slice descriptor
	*/
	void llcc_slice_putd(struct llcc_slice_desc *desc)
	{
	if (!IS_ERR_OR_NULL(desc))
	kfree(desc);
	}
	EXPORT_SYMBOL_GPL(llcc_slice_putd);

	static int llcc_update_act_ctrl(u32 sid,
	u32 act_ctrl_reg_val, u32 status)
	{
	u32 act_ctrl_reg;
	u32 status_reg;
	u32 slice_status;
	int ret;

	if (IS_ERR(drv_data))
	return PTR_ERR(drv_data);

	act_ctrl_reg = LLCC_TRP_ACT_CTRLn(sid);
	status_reg = LLCC_TRP_STATUSn(sid);

	/* Set the ACTIVE trigger */
	act_ctrl_reg_val \|= ACT_CTRL_ACT_TRIG;
	ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg,
	act_ctrl_reg_val);
	if (ret)
	return ret;

	/* Clear the ACTIVE trigger */
	act_ctrl_reg_val &= ~ACT_CTRL_ACT_TRIG;
	ret = regmap_write(drv_data->bcast_regmap, act_ctrl_reg,
	act_ctrl_reg_val);
	if (ret)
	return ret;

	ret = regmap_read_poll_timeout(drv_data->bcast_regmap, status_reg,
	slice_status, !(slice_status & status),
	0, LLCC_STATUS_READ_DELAY);
	return ret;
	}

	/**
	* llcc_slice_activate - Activate the llcc slice
	* @desc: Pointer to llcc slice descriptor
	*
	* A value of zero will be returned on success and a negative errno will
	* be returned in error cases
	*/
	int llcc_slice_activate(struct llcc_slice_desc *desc)
	{
	int ret;
	u32 act_ctrl_val;

	if (IS_ERR(drv_data))
	return PTR_ERR(drv_data);

	if (IS_ERR_OR_NULL(desc))
	return -EINVAL;

	mutex_lock(&drv_data->lock);
	if (test_bit(desc->slice_id, drv_data->bitmap)) {
	mutex_unlock(&drv_data->lock);
	return 0;
	}

	act_ctrl_val = ACT_CTRL_OPCODE_ACTIVATE << ACT_CTRL_OPCODE_SHIFT;

	ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val,
	DEACTIVATE);
	if (ret) {
	mutex_unlock(&drv_data->lock);
	return ret;
	}

	__set_bit(desc->slice_id, drv_data->bitmap);
	mutex_unlock(&drv_data->lock);

	return ret;
	}
	EXPORT_SYMBOL_GPL(llcc_slice_activate);

	/**
	* llcc_slice_deactivate - Deactivate the llcc slice
	* @desc: Pointer to llcc slice descriptor
	*
	* A value of zero will be returned on success and a negative errno will
	* be returned in error cases
	*/
	int llcc_slice_deactivate(struct llcc_slice_desc *desc)
	{
	u32 act_ctrl_val;
	int ret;

	if (IS_ERR(drv_data))
	return PTR_ERR(drv_data);

	if (IS_ERR_OR_NULL(desc))
	return -EINVAL;

	mutex_lock(&drv_data->lock);
	if (!test_bit(desc->slice_id, drv_data->bitmap)) {
	mutex_unlock(&drv_data->lock);
	return 0;
	}
	act_ctrl_val = ACT_CTRL_OPCODE_DEACTIVATE << ACT_CTRL_OPCODE_SHIFT;

	ret = llcc_update_act_ctrl(desc->slice_id, act_ctrl_val,
	ACTIVATE);
	if (ret) {
	mutex_unlock(&drv_data->lock);
	return ret;
	}

	__clear_bit(desc->slice_id, drv_data->bitmap);
	mutex_unlock(&drv_data->lock);

	return ret;
	}
	EXPORT_SYMBOL_GPL(llcc_slice_deactivate);

	/**
	* llcc_get_slice_id - return the slice id
	* @desc: Pointer to llcc slice descriptor
	*/
	int llcc_get_slice_id(struct llcc_slice_desc *desc)
	{
	if (IS_ERR_OR_NULL(desc))
	return -EINVAL;

	return desc->slice_id;
	}
	EXPORT_SYMBOL_GPL(llcc_get_slice_id);

	/**
	* llcc_get_slice_size - return the slice id
	* @desc: Pointer to llcc slice descriptor
	*/
	size_t llcc_get_slice_size(struct llcc_slice_desc *desc)
	{
	if (IS_ERR_OR_NULL(desc))
	return 0;

	return desc->slice_size;
	}
	EXPORT_SYMBOL_GPL(llcc_get_slice_size);

	static int qcom_llcc_cfg_program(struct platform_device *pdev)
	{
	int i;
	u32 attr1_cfg;
	u32 attr0_cfg;
	u32 attr1_val;
	u32 attr0_val;
	u32 max_cap_cacheline;
	u32 sz;
	int ret = 0;
	const struct llcc_slice_config *llcc_table;
	struct llcc_slice_desc desc;

	sz = drv_data->cfg_size;
	llcc_table = drv_data->cfg;

	for (i = 0; i < sz; i++) {
	attr1_cfg = LLCC_TRP_ATTR1_CFGn(llcc_table[i].slice_id);
	attr0_cfg = LLCC_TRP_ATTR0_CFGn(llcc_table[i].slice_id);

	attr1_val = llcc_table[i].cache_mode;
	attr1_val \|= llcc_table[i].probe_target_ways <<
	ATTR1_PROBE_TARGET_WAYS_SHIFT;
	attr1_val \|= llcc_table[i].fixed_size <<
	ATTR1_FIXED_SIZE_SHIFT;
	attr1_val \|= llcc_table[i].priority <<
	ATTR1_PRIORITY_SHIFT;

	max_cap_cacheline = MAX_CAP_TO_BYTES(llcc_table[i].max_cap);

	/* LLCC instances can vary for each target.
	* The SW writes to broadcast register which gets propagated
	* to each llcc instace (llcc0,.. llccN).
	* Since the size of the memory is divided equally amongst the
	* llcc instances, we need to configure the max cap accordingly.
	*/
	max_cap_cacheline = max_cap_cacheline / drv_data->num_banks;
	max_cap_cacheline >>= CACHE_LINE_SIZE_SHIFT;
	attr1_val \|= max_cap_cacheline << ATTR1_MAX_CAP_SHIFT;

	attr0_val = llcc_table[i].res_ways & ATTR0_RES_WAYS_MASK;
	attr0_val \|= llcc_table[i].bonus_ways << ATTR0_BONUS_WAYS_SHIFT;

	ret = regmap_write(drv_data->bcast_regmap, attr1_cfg,
	attr1_val);
	if (ret)
	return ret;
	ret = regmap_write(drv_data->bcast_regmap, attr0_cfg,
	attr0_val);
	if (ret)
	return ret;
	if (llcc_table[i].activate_on_init) {
	desc.slice_id = llcc_table[i].slice_id;
	ret = llcc_slice_activate(&desc);
	}
	}
	return ret;
	}

	int qcom_llcc_remove(struct platform_device *pdev)
	{
	/* Set the global pointer to a error code to avoid referencing it */
	drv_data = ERR_PTR(-ENODEV);
	return 0;
	}
	EXPORT_SYMBOL_GPL(qcom_llcc_remove);

	static struct regmap qcom_llcc_init_mmio(struct platform_device pdev,
	const char *name)
	{
	struct resource *res;
	void __iomem *base;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
	if (!res)
	return ERR_PTR(-ENODEV);

	base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(base))
	return ERR_CAST(base);

	return devm_regmap_init_mmio(&pdev->dev, base, &llcc_regmap_config);
	}

	int qcom_llcc_probe(struct platform_device *pdev,
	const struct llcc_slice_config *llcc_cfg, u32 sz)
	{
	u32 num_banks;
	struct device *dev = &pdev->dev;
	int ret, i;
	struct platform_device *llcc_edac;

	drv_data = devm_kzalloc(dev, sizeof(*drv_data), GFP_KERNEL);
	if (!drv_data) {
	ret = -ENOMEM;
	goto err;
	}

	drv_data->regmap = qcom_llcc_init_mmio(pdev, "llcc_base");
	if (IS_ERR(drv_data->regmap)) {
	ret = PTR_ERR(drv_data->regmap);
	goto err;
	}

	drv_data->bcast_regmap =
	qcom_llcc_init_mmio(pdev, "llcc_broadcast_base");
	if (IS_ERR(drv_data->bcast_regmap)) {
	ret = PTR_ERR(drv_data->bcast_regmap);
	goto err;
	}

	ret = regmap_read(drv_data->regmap, LLCC_COMMON_STATUS0,
	&num_banks);
	if (ret)
	goto err;

	num_banks &= LLCC_LB_CNT_MASK;
	num_banks >>= LLCC_LB_CNT_SHIFT;
	drv_data->num_banks = num_banks;

	for (i = 0; i < sz; i++)
	if (llcc_cfg[i].slice_id > drv_data->max_slices)
	drv_data->max_slices = llcc_cfg[i].slice_id;

	drv_data->offsets = devm_kcalloc(dev, num_banks, sizeof(u32),
	GFP_KERNEL);
	if (!drv_data->offsets) {
	ret = -ENOMEM;
	goto err;
	}

	for (i = 0; i < num_banks; i++)
	drv_data->offsets[i] = i * BANK_OFFSET_STRIDE;

	drv_data->bitmap = devm_kcalloc(dev,
	BITS_TO_LONGS(drv_data->max_slices), sizeof(unsigned long),
	GFP_KERNEL);
	if (!drv_data->bitmap) {
	ret = -ENOMEM;
	goto err;
	}

	drv_data->cfg = llcc_cfg;
	drv_data->cfg_size = sz;
	mutex_init(&drv_data->lock);
	platform_set_drvdata(pdev, drv_data);

	ret = qcom_llcc_cfg_program(pdev);
	if (ret)
	goto err;

	drv_data->ecc_irq = platform_get_irq(pdev, 0);
	if (drv_data->ecc_irq >= 0) {
	llcc_edac = platform_device_register_data(&pdev->dev,
	"qcom_llcc_edac", -1, drv_data,
	sizeof(*drv_data));
	if (IS_ERR(llcc_edac))
	dev_err(dev, "Failed to register llcc edac driver\n");
	}

	return 0;
	err:
	drv_data = ERR_PTR(-ENODEV);
	return ret;
	}
	EXPORT_SYMBOL_GPL(qcom_llcc_probe);
	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("Qualcomm Last Level Cache Controller");