// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2020 Intel Corporation */
#include <linux/iopoll.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_gen4_hw_data.h"

static u64 build_csr_ring_base_addr(dma_addr_t addr, u32 size)
{
	return BUILD_RING_BASE_ADDR(addr, size);
}

static u32 read_csr_ring_head(void __iomem *csr_base_addr, u32 bank, u32 ring)
{
	return READ_CSR_RING_HEAD(csr_base_addr, bank, ring);
}

static void write_csr_ring_head(void __iomem *csr_base_addr, u32 bank, u32 ring,
				u32 value)
{
	WRITE_CSR_RING_HEAD(csr_base_addr, bank, ring, value);
}

static u32 read_csr_ring_tail(void __iomem *csr_base_addr, u32 bank, u32 ring)
{
	return READ_CSR_RING_TAIL(csr_base_addr, bank, ring);
}

static void write_csr_ring_tail(void __iomem *csr_base_addr, u32 bank, u32 ring,
				u32 value)
{
	WRITE_CSR_RING_TAIL(csr_base_addr, bank, ring, value);
}

static u32 read_csr_e_stat(void __iomem *csr_base_addr, u32 bank)
{
	return READ_CSR_E_STAT(csr_base_addr, bank);
}

static void write_csr_ring_config(void __iomem *csr_base_addr, u32 bank, u32 ring,
				  u32 value)
{
	WRITE_CSR_RING_CONFIG(csr_base_addr, bank, ring, value);
}

static void write_csr_ring_base(void __iomem *csr_base_addr, u32 bank, u32 ring,
				dma_addr_t addr)
{
	WRITE_CSR_RING_BASE(csr_base_addr, bank, ring, addr);
}

static void write_csr_int_flag(void __iomem *csr_base_addr, u32 bank,
			       u32 value)
{
	WRITE_CSR_INT_FLAG(csr_base_addr, bank, value);
}

static void write_csr_int_srcsel(void __iomem *csr_base_addr, u32 bank)
{
	WRITE_CSR_INT_SRCSEL(csr_base_addr, bank);
}

static void write_csr_int_col_en(void __iomem *csr_base_addr, u32 bank, u32 value)
{
	WRITE_CSR_INT_COL_EN(csr_base_addr, bank, value);
}

static void write_csr_int_col_ctl(void __iomem *csr_base_addr, u32 bank,
				  u32 value)
{
	WRITE_CSR_INT_COL_CTL(csr_base_addr, bank, value);
}

static void write_csr_int_flag_and_col(void __iomem *csr_base_addr, u32 bank,
				       u32 value)
{
	WRITE_CSR_INT_FLAG_AND_COL(csr_base_addr, bank, value);
}

static void write_csr_ring_srv_arb_en(void __iomem *csr_base_addr, u32 bank,
				      u32 value)
{
	WRITE_CSR_RING_SRV_ARB_EN(csr_base_addr, bank, value);
}

void adf_gen4_init_hw_csr_ops(struct adf_hw_csr_ops *csr_ops)
{
	csr_ops->build_csr_ring_base_addr = build_csr_ring_base_addr;
	csr_ops->read_csr_ring_head = read_csr_ring_head;
	csr_ops->write_csr_ring_head = write_csr_ring_head;
	csr_ops->read_csr_ring_tail = read_csr_ring_tail;
	csr_ops->write_csr_ring_tail = write_csr_ring_tail;
	csr_ops->read_csr_e_stat = read_csr_e_stat;
	csr_ops->write_csr_ring_config = write_csr_ring_config;
	csr_ops->write_csr_ring_base = write_csr_ring_base;
	csr_ops->write_csr_int_flag = write_csr_int_flag;
	csr_ops->write_csr_int_srcsel = write_csr_int_srcsel;
	csr_ops->write_csr_int_col_en = write_csr_int_col_en;
	csr_ops->write_csr_int_col_ctl = write_csr_int_col_ctl;
	csr_ops->write_csr_int_flag_and_col = write_csr_int_flag_and_col;
	csr_ops->write_csr_ring_srv_arb_en = write_csr_ring_srv_arb_en;
}
EXPORT_SYMBOL_GPL(adf_gen4_init_hw_csr_ops);

static inline void adf_gen4_unpack_ssm_wdtimer(u64 value, u32 *upper,
					       u32 *lower)
{
	*lower = lower_32_bits(value);
	*upper = upper_32_bits(value);
}

void adf_gen4_set_ssm_wdtimer(struct adf_accel_dev *accel_dev)
{
	void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev);
	u64 timer_val_pke = ADF_SSM_WDT_PKE_DEFAULT_VALUE;
	u64 timer_val = ADF_SSM_WDT_DEFAULT_VALUE;
	u32 ssm_wdt_pke_high = 0;
	u32 ssm_wdt_pke_low = 0;
	u32 ssm_wdt_high = 0;
	u32 ssm_wdt_low = 0;

	/* Convert 64bit WDT timer value into 32bit values for
	 * mmio write to 32bit CSRs.
	 */
	adf_gen4_unpack_ssm_wdtimer(timer_val, &ssm_wdt_high, &ssm_wdt_low);
	adf_gen4_unpack_ssm_wdtimer(timer_val_pke, &ssm_wdt_pke_high,
				    &ssm_wdt_pke_low);

	/* Enable WDT for sym and dc */
	ADF_CSR_WR(pmisc_addr, ADF_SSMWDTL_OFFSET, ssm_wdt_low);
	ADF_CSR_WR(pmisc_addr, ADF_SSMWDTH_OFFSET, ssm_wdt_high);
	/* Enable WDT for pke */
	ADF_CSR_WR(pmisc_addr, ADF_SSMWDTPKEL_OFFSET, ssm_wdt_pke_low);
	ADF_CSR_WR(pmisc_addr, ADF_SSMWDTPKEH_OFFSET, ssm_wdt_pke_high);
}
EXPORT_SYMBOL_GPL(adf_gen4_set_ssm_wdtimer);

int adf_pfvf_comms_disabled(struct adf_accel_dev *accel_dev)
{
	return 0;
}
EXPORT_SYMBOL_GPL(adf_pfvf_comms_disabled);

static int reset_ring_pair(void __iomem *csr, u32 bank_number)
{
	u32 status;
	int ret;

	/* Write rpresetctl register BIT(0) as 1
	 * Since rpresetctl registers have no RW fields, no need to preserve
	 * values for other bits. Just write directly.
	 */
	ADF_CSR_WR(csr, ADF_WQM_CSR_RPRESETCTL(bank_number),
		   ADF_WQM_CSR_RPRESETCTL_RESET);

	/* Read rpresetsts register and wait for rp reset to complete */
	ret = read_poll_timeout(ADF_CSR_RD, status,
				status & ADF_WQM_CSR_RPRESETSTS_STATUS,
				ADF_RPRESET_POLL_DELAY_US,
				ADF_RPRESET_POLL_TIMEOUT_US, true,
				csr, ADF_WQM_CSR_RPRESETSTS(bank_number));
	if (!ret) {
		/* When rp reset is done, clear rpresetsts */
		ADF_CSR_WR(csr, ADF_WQM_CSR_RPRESETSTS(bank_number),
			   ADF_WQM_CSR_RPRESETSTS_STATUS);
	}

	return ret;
}

int adf_gen4_ring_pair_reset(struct adf_accel_dev *accel_dev, u32 bank_number)
{
	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
	u32 etr_bar_id = hw_data->get_etr_bar_id(hw_data);
	void __iomem *csr;
	int ret;

	if (bank_number >= hw_data->num_banks)
		return -EINVAL;

	dev_dbg(&GET_DEV(accel_dev),
		"ring pair reset for bank:%d\n", bank_number);

	csr = (&GET_BARS(accel_dev)[etr_bar_id])->virt_addr;
	ret = reset_ring_pair(csr, bank_number);
	if (ret)
		dev_err(&GET_DEV(accel_dev),
			"ring pair reset failed (timeout)\n");
	else
		dev_dbg(&GET_DEV(accel_dev), "ring pair reset successful\n");

	return ret;
}
EXPORT_SYMBOL_GPL(adf_gen4_ring_pair_reset);