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.
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.
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.
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
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
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.
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.
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>
55 #include "adf_dh895xcc_hw_data.h"
57 #define ADF_ADMINMSG_LEN 32
59 struct adf_admin_comms {
62 void __iomem *mailbox_addr;
63 struct mutex lock; /* protects adf_admin_comms struct */
66 int adf_put_admin_msg_sync(struct adf_accel_dev *accel_dev,
67 uint32_t ae, void *in, void *out)
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;
75 mutex_lock(&admin->lock);
77 if (ADF_CSR_RD(mailbox, mb_offset) == 1) {
78 mutex_unlock(&admin->lock);
82 memcpy(admin->virt_addr + offset, in, ADF_ADMINMSG_LEN);
83 ADF_CSR_WR(mailbox, mb_offset, 1);
85 for (times = 0; times < 50; times++) {
87 if (ADF_CSR_RD(mailbox, mb_offset) == 0) {
93 memcpy(out, admin->virt_addr + offset +
94 ADF_ADMINMSG_LEN, ADF_ADMINMSG_LEN);
96 dev_err(&GET_DEV(accel_dev),
97 "Failed to send admin msg to accelerator\n");
99 mutex_unlock(&admin->lock);
100 return received ? 0 : -EFAULT;
103 int adf_init_admin_comms(struct adf_accel_dev *accel_dev)
105 struct adf_admin_comms *admin;
106 struct adf_bar *pmisc = &GET_BARS(accel_dev)[ADF_DH895XCC_PMISC_BAR];
107 void __iomem *csr = pmisc->virt_addr;
108 void __iomem *mailbox = csr + ADF_DH895XCC_MAILBOX_BASE_OFFSET;
111 admin = kzalloc_node(sizeof(*accel_dev->admin), GFP_KERNEL,
112 dev_to_node(&GET_DEV(accel_dev)));
115 admin->virt_addr = dma_zalloc_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
116 &admin->phy_addr, GFP_KERNEL);
117 if (!admin->virt_addr) {
118 dev_err(&GET_DEV(accel_dev), "Failed to allocate dma buff\n");
122 reg_val = (uint64_t)admin->phy_addr;
123 ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGUR_OFFSET, reg_val >> 32);
124 ADF_CSR_WR(csr, ADF_DH895XCC_ADMINMSGLR_OFFSET, reg_val);
125 mutex_init(&admin->lock);
126 admin->mailbox_addr = mailbox;
127 accel_dev->admin = admin;
131 void adf_exit_admin_comms(struct adf_accel_dev *accel_dev)
133 struct adf_admin_comms *admin = accel_dev->admin;
138 if (admin->virt_addr)
139 dma_free_coherent(&GET_DEV(accel_dev), PAGE_SIZE,
140 admin->virt_addr, admin->phy_addr);
142 mutex_destroy(&admin->lock);
144 accel_dev->admin = NULL;