145 lines
4.7 KiB
C
145 lines
4.7 KiB
C
/*
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This file is provided under a dual BSD/GPLv2 license. When using or
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redistributing this file, you may do so under either license.
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GPL LICENSE SUMMARY
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Copyright(c) 2014 Intel Corporation.
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This program is free software; you can redistribute it and/or modify
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it under the terms of version 2 of the GNU General Public License as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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Contact Information:
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qat-linux@intel.com
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BSD LICENSE
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Copyright(c) 2014 Intel Corporation.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <adf_accel_devices.h>
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#include "adf_drv.h"
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#include "adf_dh895xcc_hw_data.h"
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#define ADF_ADMINMSG_LEN 32
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struct adf_admin_comms {
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dma_addr_t phy_addr;
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void *virt_addr;
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void __iomem *mailbox_addr;
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struct mutex lock; /* protects adf_admin_comms struct */
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};
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int adf_put_admin_msg_sync(struct adf_accel_dev *accel_dev,
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uint32_t ae, void *in, void *out)
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{
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struct adf_admin_comms *admin = accel_dev->admin;
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int offset = ae * ADF_ADMINMSG_LEN * 2;
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void __iomem *mailbox = admin->mailbox_addr;
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int mb_offset = ae * ADF_DH895XCC_MAILBOX_STRIDE;
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int times, received;
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mutex_lock(&admin->lock);
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if (ADF_CSR_RD(mailbox, mb_offset) == 1) {
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mutex_unlock(&admin->lock);
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return -EAGAIN;
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}
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memcpy(admin->virt_addr + offset, in, ADF_ADMINMSG_LEN);
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ADF_CSR_WR(mailbox, mb_offset, 1);
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received = 0;
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for (times = 0; times < 50; times++) {
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msleep(20);
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if (ADF_CSR_RD(mailbox, mb_offset) == 0) {
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received = 1;
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break;
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}
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}
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if (received)
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memcpy(out, admin->virt_addr + offset +
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ADF_ADMINMSG_LEN, ADF_ADMINMSG_LEN);
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else
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pr_err("QAT: Failed to send admin msg to accelerator\n");
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mutex_unlock(&admin->lock);
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return received ? 0 : -EFAULT;
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}
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int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
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{
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struct adf_admin_comms *admin;
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struct adf_bar *pmisc = &GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR];
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void __iomem *csr = pmisc->virt_addr;
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void __iomem *mailbox = csr + ADF_DH895XCC_MAILBOX_BASE_OFFSET;
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uint64_t reg_val;
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admin = kzalloc_node(sizeof(*accel_dev->admin), GFP_KERNEL,
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dev_to_node(&GET_DEV(accel_dev)));
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if (!admin)
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return -ENOMEM;
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admin->virt_addr = dma_zalloc_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
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&admin->phy_addr, GFP_KERNEL);
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if (!admin->virt_addr) {
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dev_err(&GET_DEV(accel_dev), "Failed to allocate dma buff\n");
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kfree(admin);
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return -ENOMEM;
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}
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reg_val = (uint64_t)admin->phy_addr;
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ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGUR_OFFSET, reg_val >> 32);
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ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGLR_OFFSET, reg_val);
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mutex_init(&admin->lock);
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admin->mailbox_addr = mailbox;
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accel_dev->admin = admin;
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return 0;
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}
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void adf_exit_admin_comms(struct adf_accel_dev *accel_dev)
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{
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struct adf_admin_comms *admin = accel_dev->admin;
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if (!admin)
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return;
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if (admin->virt_addr)
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dma_free_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
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admin->virt_addr, admin->phy_addr);
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mutex_destroy(&admin->lock);
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kfree(admin);
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accel_dev->admin = NULL;
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}
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