1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
2 /* Copyright(c) 2015 - 2021 Intel Corporation */
3 #include <linux/bitfield.h>
4 #include "adf_accel_devices.h"
5 #include "adf_common_drv.h"
6 #include "adf_pfvf_msg.h"
7 #include "adf_pfvf_vf_msg.h"
8 #include "adf_pfvf_vf_proto.h"
9
10 /**
11 * adf_vf2pf_notify_init() - send init msg to PF
12 * @accel_dev: Pointer to acceleration VF device.
13 *
14 * Function sends an init message from the VF to a PF
15 *
16 * Return: 0 on success, error code otherwise.
17 */
adf_vf2pf_notify_init(struct adf_accel_dev * accel_dev)18 int adf_vf2pf_notify_init(struct adf_accel_dev *accel_dev)
19 {
20 struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_INIT };
21
22 if (adf_send_vf2pf_msg(accel_dev, msg)) {
23 dev_err(&GET_DEV(accel_dev),
24 "Failed to send Init event to PF\n");
25 return -EFAULT;
26 }
27 set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status);
28 return 0;
29 }
30 EXPORT_SYMBOL_GPL(adf_vf2pf_notify_init);
31
32 /**
33 * adf_vf2pf_notify_shutdown() - send shutdown msg to PF
34 * @accel_dev: Pointer to acceleration VF device.
35 *
36 * Function sends a shutdown message from the VF to a PF
37 *
38 * Return: void
39 */
adf_vf2pf_notify_shutdown(struct adf_accel_dev * accel_dev)40 void adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev)
41 {
42 struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_SHUTDOWN };
43
44 if (test_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status))
45 if (adf_send_vf2pf_msg(accel_dev, msg))
46 dev_err(&GET_DEV(accel_dev),
47 "Failed to send Shutdown event to PF\n");
48 }
49 EXPORT_SYMBOL_GPL(adf_vf2pf_notify_shutdown);
50
adf_vf2pf_request_version(struct adf_accel_dev * accel_dev)51 int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev)
52 {
53 u8 pf_version;
54 int compat;
55 int ret;
56 struct pfvf_message resp;
57 struct pfvf_message msg = {
58 .type = ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ,
59 .data = ADF_PFVF_COMPAT_THIS_VERSION,
60 };
61
62 BUILD_BUG_ON(ADF_PFVF_COMPAT_THIS_VERSION > 255);
63
64 ret = adf_send_vf2pf_req(accel_dev, msg, &resp);
65 if (ret) {
66 dev_err(&GET_DEV(accel_dev),
67 "Failed to send Compatibility Version Request.\n");
68 return ret;
69 }
70
71 pf_version = FIELD_GET(ADF_PF2VF_VERSION_RESP_VERS_MASK, resp.data);
72 compat = FIELD_GET(ADF_PF2VF_VERSION_RESP_RESULT_MASK, resp.data);
73
74 /* Response from PF received, check compatibility */
75 switch (compat) {
76 case ADF_PF2VF_VF_COMPATIBLE:
77 break;
78 case ADF_PF2VF_VF_COMPAT_UNKNOWN:
79 /* VF is newer than PF - compatible for now */
80 break;
81 case ADF_PF2VF_VF_INCOMPATIBLE:
82 dev_err(&GET_DEV(accel_dev),
83 "PF (vers %d) and VF (vers %d) are not compatible\n",
84 pf_version, ADF_PFVF_COMPAT_THIS_VERSION);
85 return -EINVAL;
86 default:
87 dev_err(&GET_DEV(accel_dev),
88 "Invalid response from PF; assume not compatible\n");
89 return -EINVAL;
90 }
91
92 accel_dev->vf.pf_compat_ver = pf_version;
93 return 0;
94 }
95
adf_vf2pf_get_capabilities(struct adf_accel_dev * accel_dev)96 int adf_vf2pf_get_capabilities(struct adf_accel_dev *accel_dev)
97 {
98 struct adf_hw_device_data *hw_data = accel_dev->hw_device;
99 struct capabilities_v3 cap_msg = { 0 };
100 unsigned int len = sizeof(cap_msg);
101
102 if (accel_dev->vf.pf_compat_ver < ADF_PFVF_COMPAT_CAPABILITIES)
103 /* The PF is too old to support the extended capabilities */
104 return 0;
105
106 if (adf_send_vf2pf_blkmsg_req(accel_dev, ADF_VF2PF_BLKMSG_REQ_CAP_SUMMARY,
107 (u8 *)&cap_msg, &len)) {
108 dev_err(&GET_DEV(accel_dev),
109 "QAT: Failed to get block message response\n");
110 return -EFAULT;
111 }
112
113 switch (cap_msg.hdr.version) {
114 default:
115 /* Newer version received, handle only the know parts */
116 fallthrough;
117 case ADF_PFVF_CAPABILITIES_V3_VERSION:
118 if (likely(len >= sizeof(struct capabilities_v3)))
119 hw_data->clock_frequency = cap_msg.frequency;
120 else
121 dev_info(&GET_DEV(accel_dev), "Could not get frequency");
122 fallthrough;
123 case ADF_PFVF_CAPABILITIES_V2_VERSION:
124 if (likely(len >= sizeof(struct capabilities_v2)))
125 hw_data->accel_capabilities_mask = cap_msg.capabilities;
126 else
127 dev_info(&GET_DEV(accel_dev), "Could not get capabilities");
128 fallthrough;
129 case ADF_PFVF_CAPABILITIES_V1_VERSION:
130 if (likely(len >= sizeof(struct capabilities_v1))) {
131 hw_data->extended_dc_capabilities = cap_msg.ext_dc_caps;
132 } else {
133 dev_err(&GET_DEV(accel_dev),
134 "Capabilities message truncated to %d bytes\n", len);
135 return -EFAULT;
136 }
137 }
138
139 return 0;
140 }
141
adf_vf2pf_get_ring_to_svc(struct adf_accel_dev * accel_dev)142 int adf_vf2pf_get_ring_to_svc(struct adf_accel_dev *accel_dev)
143 {
144 struct ring_to_svc_map_v1 rts_map_msg = { 0 };
145 unsigned int len = sizeof(rts_map_msg);
146
147 if (accel_dev->vf.pf_compat_ver < ADF_PFVF_COMPAT_RING_TO_SVC_MAP)
148 /* Use already set default mappings */
149 return 0;
150
151 if (adf_send_vf2pf_blkmsg_req(accel_dev, ADF_VF2PF_BLKMSG_REQ_RING_SVC_MAP,
152 (u8 *)&rts_map_msg, &len)) {
153 dev_err(&GET_DEV(accel_dev),
154 "QAT: Failed to get block message response\n");
155 return -EFAULT;
156 }
157
158 if (unlikely(len < sizeof(struct ring_to_svc_map_v1))) {
159 dev_err(&GET_DEV(accel_dev),
160 "RING_TO_SVC message truncated to %d bytes\n", len);
161 return -EFAULT;
162 }
163
164 /* Only v1 at present */
165 accel_dev->hw_device->ring_to_svc_map = rts_map_msg.map;
166 return 0;
167 }
168