1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
/* Copyright(c) 2021 Intel Corporation */
#include <linux/iopoll.h>
#include <linux/mutex.h>
#include <linux/types.h>
#include "adf_accel_devices.h"
#include "adf_common_drv.h"
#include "adf_gen4_pfvf.h"
#include "adf_pfvf_pf_proto.h"
#include "adf_pfvf_utils.h"
#define ADF_4XXX_PF2VM_OFFSET(i) (0x40B010 + ((i) * 0x20))
#define ADF_4XXX_VM2PF_OFFSET(i) (0x40B014 + ((i) * 0x20))
/* VF2PF interrupt source registers */
#define ADF_4XXX_VM2PF_SOU 0x41A180
#define ADF_4XXX_VM2PF_MSK 0x41A1C0
#define ADF_GEN4_VF_MSK 0xFFFF
#define ADF_PFVF_GEN4_MSGTYPE_SHIFT 2
#define ADF_PFVF_GEN4_MSGTYPE_MASK 0x3F
#define ADF_PFVF_GEN4_MSGDATA_SHIFT 8
#define ADF_PFVF_GEN4_MSGDATA_MASK 0xFFFFFF
static const struct pfvf_csr_format csr_gen4_fmt = {
{ ADF_PFVF_GEN4_MSGTYPE_SHIFT, ADF_PFVF_GEN4_MSGTYPE_MASK },
{ ADF_PFVF_GEN4_MSGDATA_SHIFT, ADF_PFVF_GEN4_MSGDATA_MASK },
};
static u32 adf_gen4_pf_get_pf2vf_offset(u32 i)
{
return ADF_4XXX_PF2VM_OFFSET(i);
}
static u32 adf_gen4_pf_get_vf2pf_offset(u32 i)
{
return ADF_4XXX_VM2PF_OFFSET(i);
}
static void adf_gen4_enable_vf2pf_interrupts(void __iomem *pmisc_addr, u32 vf_mask)
{
u32 val;
val = ADF_CSR_RD(pmisc_addr, ADF_4XXX_VM2PF_MSK) & ~vf_mask;
ADF_CSR_WR(pmisc_addr, ADF_4XXX_VM2PF_MSK, val);
}
static void adf_gen4_disable_all_vf2pf_interrupts(void __iomem *pmisc_addr)
{
ADF_CSR_WR(pmisc_addr, ADF_4XXX_VM2PF_MSK, ADF_GEN4_VF_MSK);
}
static u32 adf_gen4_disable_pending_vf2pf_interrupts(void __iomem *pmisc_addr)
{
u32 sources, disabled, pending;
/* Get the interrupt sources triggered by VFs */
sources = ADF_CSR_RD(pmisc_addr, ADF_4XXX_VM2PF_SOU);
if (!sources)
return 0;
/* Get the already disabled interrupts */
disabled = ADF_CSR_RD(pmisc_addr, ADF_4XXX_VM2PF_MSK);
pending = sources & ~disabled;
if (!pending)
return 0;
/* Due to HW limitations, when disabling the interrupts, we can't
* just disable the requested sources, as this would lead to missed
* interrupts if VM2PF_SOU changes just before writing to VM2PF_MSK.
* To work around it, disable all and re-enable only the sources that
* are not in vf_mask and were not already disabled. Re-enabling will
* trigger a new interrupt for the sources that have changed in the
* meantime, if any.
*/
ADF_CSR_WR(pmisc_addr, ADF_4XXX_VM2PF_MSK, ADF_GEN4_VF_MSK);
ADF_CSR_WR(pmisc_addr, ADF_4XXX_VM2PF_MSK, disabled | sources);
/* Return the sources of the (new) interrupt(s) */
return pending;
}
static int adf_gen4_pfvf_send(struct adf_accel_dev *accel_dev,
struct pfvf_message msg, u32 pfvf_offset,
struct mutex *csr_lock)
{
void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev);
u32 csr_val;
int ret;
csr_val = adf_pfvf_csr_msg_of(accel_dev, msg, &csr_gen4_fmt);
if (unlikely(!csr_val))
return -EINVAL;
mutex_lock(csr_lock);
ADF_CSR_WR(pmisc_addr, pfvf_offset, csr_val | ADF_PFVF_INT);
/* Wait for confirmation from remote that it received the message */
ret = read_poll_timeout(ADF_CSR_RD, csr_val, !(csr_val & ADF_PFVF_INT),
ADF_PFVF_MSG_ACK_DELAY_US,
ADF_PFVF_MSG_ACK_MAX_DELAY_US,
true, pmisc_addr, pfvf_offset);
if (ret < 0)
dev_dbg(&GET_DEV(accel_dev), "ACK not received from remote\n");
mutex_unlock(csr_lock);
return ret;
}
static struct pfvf_message adf_gen4_pfvf_recv(struct adf_accel_dev *accel_dev,
u32 pfvf_offset, u8 compat_ver)
{
void __iomem *pmisc_addr = adf_get_pmisc_base(accel_dev);
struct pfvf_message msg = { 0 };
u32 csr_val;
/* Read message from the CSR */
csr_val = ADF_CSR_RD(pmisc_addr, pfvf_offset);
if (!(csr_val & ADF_PFVF_INT)) {
dev_info(&GET_DEV(accel_dev),
"Spurious PFVF interrupt, msg 0x%.8x. Ignored\n", csr_val);
return msg;
}
/* We can now acknowledge the message reception by clearing the
* interrupt bit
*/
ADF_CSR_WR(pmisc_addr, pfvf_offset, csr_val & ~ADF_PFVF_INT);
/* Return the pfvf_message format */
return adf_pfvf_message_of(accel_dev, csr_val, &csr_gen4_fmt);
}
void adf_gen4_init_pf_pfvf_ops(struct adf_pfvf_ops *pfvf_ops)
{
pfvf_ops->enable_comms = adf_enable_pf2vf_comms;
pfvf_ops->get_pf2vf_offset = adf_gen4_pf_get_pf2vf_offset;
pfvf_ops->get_vf2pf_offset = adf_gen4_pf_get_vf2pf_offset;
pfvf_ops->enable_vf2pf_interrupts = adf_gen4_enable_vf2pf_interrupts;
pfvf_ops->disable_all_vf2pf_interrupts = adf_gen4_disable_all_vf2pf_interrupts;
pfvf_ops->disable_pending_vf2pf_interrupts = adf_gen4_disable_pending_vf2pf_interrupts;
pfvf_ops->send_msg = adf_gen4_pfvf_send;
pfvf_ops->recv_msg = adf_gen4_pfvf_recv;
}
EXPORT_SYMBOL_GPL(adf_gen4_init_pf_pfvf_ops);
|
