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
59 struct 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
adf_put_admin_msg_sync(struct adf_accel_dev * accel_dev,uint32_t ae,void * in,void * out)66 int 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
adf_init_admin_comms(struct adf_accel_dev * accel_dev)102 int 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
adf_exit_admin_comms(struct adf_accel_dev * accel_dev)130 void 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