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// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2014 - 2020 Intel Corporation */
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_transport_internal.h"
#define ADF_ARB_NUM 4
#define ADF_ARB_REG_SIZE 0x4
#define WRITE_CSR_ARB_SARCONFIG(csr_addr, arb_offset, index, value) \
ADF_CSR_WR(csr_addr, (arb_offset) + \
(ADF_ARB_REG_SIZE * (index)), value)
#define WRITE_CSR_ARB_WT2SAM(csr_addr, arb_offset, wt_offset, index, value) \
ADF_CSR_WR(csr_addr, ((arb_offset) + (wt_offset)) + \
(ADF_ARB_REG_SIZE * (index)), value)
int adf_init_arb(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
void __iomem *csr = accel_dev->transport->banks[0].csr_addr;
u32 arb_off, wt_off, arb_cfg;
const u32 *thd_2_arb_cfg;
struct arb_info info;
int arb, i;
hw_data->get_arb_info(&info);
arb_cfg = info.arb_cfg;
arb_off = info.arb_offset;
wt_off = info.wt2sam_offset;
/* Service arb configured for 32 bytes responses and
* ring flow control check enabled. */
for (arb = 0; arb < ADF_ARB_NUM; arb++)
WRITE_CSR_ARB_SARCONFIG(csr, arb_off, arb, arb_cfg);
/* Map worker threads to service arbiters */
hw_data->get_arb_mapping(accel_dev, &thd_2_arb_cfg);
if (!thd_2_arb_cfg)
return -EFAULT;
for (i = 0; i < hw_data->num_engines; i++)
WRITE_CSR_ARB_WT2SAM(csr, arb_off, wt_off, i, thd_2_arb_cfg[i]);
return 0;
}
EXPORT_SYMBOL_GPL(adf_init_arb);
void adf_update_ring_arb(struct adf_etr_ring_data *ring)
{
struct adf_accel_dev *accel_dev = ring->bank->accel_dev;
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(accel_dev);
u32 tx_ring_mask = hw_data->tx_rings_mask;
u32 shift = hw_data->tx_rx_gap;
u32 arben, arben_tx, arben_rx;
u32 rx_ring_mask;
/*
* Enable arbitration on a ring only if the TX half of the ring mask
* matches the RX part. This results in writes to CSR on both TX and
* RX update - only one is necessary, but both are done for
* simplicity.
*/
rx_ring_mask = tx_ring_mask << shift;
arben_tx = (ring->bank->ring_mask & tx_ring_mask) >> 0;
arben_rx = (ring->bank->ring_mask & rx_ring_mask) >> shift;
arben = arben_tx & arben_rx;
csr_ops->write_csr_ring_srv_arb_en(ring->bank->csr_addr,
ring->bank->bank_number, arben);
}
void adf_exit_arb(struct adf_accel_dev *accel_dev)
{
struct adf_hw_device_data *hw_data = accel_dev->hw_device;
struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(accel_dev);
u32 arb_off, wt_off;
struct arb_info info;
void __iomem *csr;
unsigned int i;
hw_data->get_arb_info(&info);
arb_off = info.arb_offset;
wt_off = info.wt2sam_offset;
if (!accel_dev->transport)
return;
csr = accel_dev->transport->banks[0].csr_addr;
hw_data->get_arb_info(&info);
/* Reset arbiter configuration */
for (i = 0; i < ADF_ARB_NUM; i++)
WRITE_CSR_ARB_SARCONFIG(csr, arb_off, i, 0);
/* Unmap worker threads to service arbiters */
for (i = 0; i < hw_data->num_engines; i++)
WRITE_CSR_ARB_WT2SAM(csr, arb_off, wt_off, i, 0);
/* Disable arbitration on all rings */
for (i = 0; i < GET_MAX_BANKS(accel_dev); i++)
csr_ops->write_csr_ring_srv_arb_en(csr, i, 0);
}
EXPORT_SYMBOL_GPL(adf_exit_arb);
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