drivers/crypto/qat/qat_common/adf_hw_arbiter.c

   1 /*
   2   This file is provided under a dual BSD/GPLv2 license.  When using or
   3   redistributing this file, you may do so under either license.
   4
   5   GPL LICENSE SUMMARY
   6   Copyright(c) 2014 Intel Corporation.
   7   This program is free software; you can redistribute it and/or modify
   8   it under the terms of version 2 of the GNU General Public License as
   9   published by the Free Software Foundation.
  10
  11   This program is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14   General Public License for more details.
  15
  16   Contact Information:
  17   qat-linux@intel.com
  18
  19   BSD LICENSE
  20   Copyright(c) 2014 Intel Corporation.
  21   Redistribution and use in source and binary forms, with or without
  22   modification, are permitted provided that the following conditions
  23   are met:
  24
  25     * Redistributions of source code must retain the above copyright
  26       notice, this list of conditions and the following disclaimer.
  27     * Redistributions in binary form must reproduce the above copyright
  28       notice, this list of conditions and the following disclaimer in
  29       the documentation and/or other materials provided with the
  30       distribution.
  31     * Neither the name of Intel Corporation nor the names of its
  32       contributors may be used to endorse or promote products derived
  33       from this software without specific prior written permission.
  34
  35   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  36   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  37   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  38   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  39   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  40   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  41   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  42   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  43   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  44   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  45   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  46 */
  47 #include "adf_accel_devices.h"
  48 #include "adf_common_drv.h"
  49 #include "adf_transport_internal.h"
  50
  51 #define ADF_ARB_NUM 4
  52 #define ADF_ARB_REG_SIZE 0x4
  53 #define ADF_ARB_WTR_SIZE 0x20
  54 #define ADF_ARB_OFFSET 0x30000
  55 #define ADF_ARB_REG_SLOT 0x1000
  56 #define ADF_ARB_WTR_OFFSET 0x010
  57 #define ADF_ARB_RO_EN_OFFSET 0x090
  58 #define ADF_ARB_WQCFG_OFFSET 0x100
  59 #define ADF_ARB_WRK_2_SER_MAP_OFFSET 0x180
  60 #define ADF_ARB_RINGSRVARBEN_OFFSET 0x19C
  61
  62 #define WRITE_CSR_ARB_RINGSRVARBEN(csr_addr, index, value) \
  63         ADF_CSR_WR(csr_addr, ADF_ARB_RINGSRVARBEN_OFFSET + \
  64         (ADF_ARB_REG_SLOT * index), value)
  65
  66 #define WRITE_CSR_ARB_SARCONFIG(csr_addr, index, value) \
  67         ADF_CSR_WR(csr_addr, ADF_ARB_OFFSET + \
  68         (ADF_ARB_REG_SIZE * index), value)
  69
  70 #define WRITE_CSR_ARB_WRK_2_SER_MAP(csr_addr, index, value) \
  71         ADF_CSR_WR(csr_addr, (ADF_ARB_OFFSET + \
  72         ADF_ARB_WRK_2_SER_MAP_OFFSET) + \
  73         (ADF_ARB_REG_SIZE * index), value)
  74
  75 #define WRITE_CSR_ARB_WQCFG(csr_addr, index, value) \
  76         ADF_CSR_WR(csr_addr, (ADF_ARB_OFFSET + \
  77         ADF_ARB_WQCFG_OFFSET) + (ADF_ARB_REG_SIZE * index), value)
  78
  79 int adf_init_arb(struct adf_accel_dev *accel_dev)
  80 {
  81         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
  82         void __iomem *csr = accel_dev->transport->banks[0].csr_addr;
  83         u32 arb_cfg = 0x1 << 31 | 0x4 << 4 | 0x1;
  84         u32 arb, i;
  85         const u32 *thd_2_arb_cfg;
  86
  87         /* Service arb configured for 32 bytes responses and
  88          * ring flow control check enabled. */
  89         for (arb = 0; arb < ADF_ARB_NUM; arb++)
  90                 WRITE_CSR_ARB_SARCONFIG(csr, arb, arb_cfg);
  91
  92         /* Setup worker queue registers */
  93         for (i = 0; i < hw_data->num_engines; i++)
  94                 WRITE_CSR_ARB_WQCFG(csr, i, i);
  95
  96         /* Map worker threads to service arbiters */
  97         hw_data->get_arb_mapping(accel_dev, &thd_2_arb_cfg);
  98
  99         if (!thd_2_arb_cfg)
 100                 return -EFAULT;
 101
 102         for (i = 0; i < hw_data->num_engines; i++)
 103                 WRITE_CSR_ARB_WRK_2_SER_MAP(csr, i, *(thd_2_arb_cfg + i));
 104
 105         return 0;
 106 }
 107 EXPORT_SYMBOL_GPL(adf_init_arb);
 108
 109 void adf_update_ring_arb(struct adf_etr_ring_data *ring)
 110 {
 111         WRITE_CSR_ARB_RINGSRVARBEN(ring->bank->csr_addr,
 112                                    ring->bank->bank_number,
 113                                    ring->bank->ring_mask & 0xFF);
 114 }
 115
 116 void adf_exit_arb(struct adf_accel_dev *accel_dev)
 117 {
 118         struct adf_hw_device_data *hw_data = accel_dev->hw_device;
 119         void __iomem *csr;
 120         unsigned int i;
 121
 122         if (!accel_dev->transport)
 123                 return;
 124
 125         csr = accel_dev->transport->banks[0].csr_addr;
 126
 127         /* Reset arbiter configuration */
 128         for (i = 0; i < ADF_ARB_NUM; i++)
 129                 WRITE_CSR_ARB_SARCONFIG(csr, i, 0);
 130
 131         /* Shutdown work queue */
 132         for (i = 0; i < hw_data->num_engines; i++)
 133                 WRITE_CSR_ARB_WQCFG(csr, i, 0);
 134
 135         /* Unmap worker threads to service arbiters */
 136         for (i = 0; i < hw_data->num_engines; i++)
 137                 WRITE_CSR_ARB_WRK_2_SER_MAP(csr, i, 0);
 138
 139         /* Disable arbitration on all rings */
 140         for (i = 0; i < GET_MAX_BANKS(accel_dev); i++)
 141                 WRITE_CSR_ARB_RINGSRVARBEN(csr, i, 0);
 142 }
 143 EXPORT_SYMBOL_GPL(adf_exit_arb);