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7afa232e TS |
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 | ||
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 | ||
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, | |
09adc878 | 111 | dev_to_node(&GET_DEV(accel_dev))); |
7afa232e TS |
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 | ||
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 | } |