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 <linux/types.h> 48#include <linux/mutex.h> 49#include <linux/slab.h> 50#include <linux/delay.h> 51#include <linux/pci.h> 52#include <linux/dma-mapping.h> 53#include <adf_accel_devices.h> 54#include "adf_drv.h" 55#include "adf_dh895xcc_hw_data.h" 56 57#define ADF_ADMINMSG_LEN 32 58 59struct adf_admin_comms { 60 dma_addr_t phy_addr; 61 void *virt_addr; 62 void __iomem *mailbox_addr; 63 struct mutex lock; /* protects adf_admin_comms struct */ 64}; 65 66int adf_put_admin_msg_sync(struct adf_accel_dev *accel_dev, 67 uint32_t ae, void *in, void *out) 68{ 69 struct adf_admin_comms *admin = accel_dev->admin; 70 int offset = ae * ADF_ADMINMSG_LEN * 2; 71 void __iomem *mailbox = admin->mailbox_addr; 72 int mb_offset = ae * ADF_DH895XCC_MAILBOX_STRIDE; 73 int times, received; 74 75 mutex_lock(&admin->lock); 76 77 if (ADF_CSR_RD(mailbox, mb_offset) == 1) { 78 mutex_unlock(&admin->lock); 79 return -EAGAIN; 80 } 81 82 memcpy(admin->virt_addr + offset, in, ADF_ADMINMSG_LEN); 83 ADF_CSR_WR(mailbox, mb_offset, 1); 84 received = 0; 85 for (times = 0; times < 50; times++) { 86 msleep(20); 87 if (ADF_CSR_RD(mailbox, mb_offset) == 0) { 88 received = 1; 89 break; 90 } 91 } 92 if (received) 93 memcpy(out, admin->virt_addr + offset + 94 ADF_ADMINMSG_LEN, ADF_ADMINMSG_LEN); 95 else 96 pr_err("QAT: Failed to send admin msg to accelerator\n"); 97 98 mutex_unlock(&admin->lock); 99 return received ? 0 : -EFAULT; 100} 101 102int adf_init_admin_comms(struct adf_accel_dev *accel_dev) 103{ 104 struct adf_admin_comms *admin; 105 struct adf_bar *pmisc = &GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR]; 106 void __iomem *csr = pmisc->virt_addr; 107 void __iomem *mailbox = csr + ADF_DH895XCC_MAILBOX_BASE_OFFSET; 108 uint64_t reg_val; 109 110 admin = kzalloc_node(sizeof(*accel_dev->admin), GFP_KERNEL, 111 dev_to_node(&GET_DEV(accel_dev))); 112 if (!admin) 113 return -ENOMEM; 114 admin->virt_addr = dma_zalloc_coherent(&GET_DEV(accel_dev), PAGE_SIZE, 115 &admin->phy_addr, GFP_KERNEL); 116 if (!admin->virt_addr) { 117 dev_err(&GET_DEV(accel_dev), "Failed to allocate dma buff\n"); 118 kfree(admin); 119 return -ENOMEM; 120 } 121 reg_val = (uint64_t)admin->phy_addr; 122 ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGUR_OFFSET, reg_val >> 32); 123 ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGLR_OFFSET, reg_val); 124 mutex_init(&admin->lock); 125 admin->mailbox_addr = mailbox; 126 accel_dev->admin = admin; 127 return 0; 128} 129 130void adf_exit_admin_comms(struct adf_accel_dev *accel_dev) 131{ 132 struct adf_admin_comms *admin = accel_dev->admin; 133 134 if (!admin) 135 return; 136 137 if (admin->virt_addr) 138 dma_free_coherent(&GET_DEV(accel_dev), PAGE_SIZE, 139 admin->virt_addr, admin->phy_addr); 140 141 mutex_destroy(&admin->lock); 142 kfree(admin); 143 accel_dev->admin = NULL; 144} 145