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