1 /* SPDX-License-Identifier: BSD-3-Clause */ 2 /* Copyright(c) 2007-2022 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 */ 18 int 19 adf_vf2pf_notify_init(struct adf_accel_dev *accel_dev) 20 { 21 struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_INIT }; 22 23 if (adf_send_vf2pf_msg(accel_dev, msg)) { 24 device_printf(GET_DEV(accel_dev), 25 "Failed to send Init event to PF\n"); 26 return -EFAULT; 27 } 28 set_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status); 29 return 0; 30 } 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 */ 40 void 41 adf_vf2pf_notify_shutdown(struct adf_accel_dev *accel_dev) 42 { 43 struct pfvf_message msg = { .type = ADF_VF2PF_MSGTYPE_SHUTDOWN }; 44 45 if (test_bit(ADF_STATUS_PF_RUNNING, &accel_dev->status)) 46 if (adf_send_vf2pf_msg(accel_dev, msg)) 47 device_printf(GET_DEV(accel_dev), 48 "Failed to send Shutdown event to PF\n"); 49 } 50 51 int 52 adf_vf2pf_request_version(struct adf_accel_dev *accel_dev) 53 { 54 u8 pf_version; 55 int compat; 56 int ret; 57 struct pfvf_message resp; 58 struct pfvf_message msg = { 59 .type = ADF_VF2PF_MSGTYPE_COMPAT_VER_REQ, 60 .data = ADF_PFVF_COMPAT_THIS_VERSION, 61 }; 62 63 BUILD_BUG_ON(ADF_PFVF_COMPAT_THIS_VERSION > 255); 64 65 ret = adf_send_vf2pf_req(accel_dev, msg, &resp); 66 if (ret) { 67 device_printf( 68 GET_DEV(accel_dev), 69 "Failed to send Compatibility Version Request.\n"); 70 return ret; 71 } 72 73 pf_version = FIELD_GET(ADF_PF2VF_VERSION_RESP_VERS_MASK, resp.data); 74 compat = FIELD_GET(ADF_PF2VF_VERSION_RESP_RESULT_MASK, resp.data); 75 76 /* Response from PF received, check compatibility */ 77 switch (compat) { 78 case ADF_PF2VF_VF_COMPATIBLE: 79 break; 80 case ADF_PF2VF_VF_COMPAT_UNKNOWN: 81 /* VF is newer than PF - compatible for now */ 82 break; 83 case ADF_PF2VF_VF_INCOMPATIBLE: 84 device_printf( 85 GET_DEV(accel_dev), 86 "PF (vers %d) and VF (vers %d) are not compatible\n", 87 pf_version, 88 ADF_PFVF_COMPAT_THIS_VERSION); 89 return -EINVAL; 90 default: 91 device_printf( 92 GET_DEV(accel_dev), 93 "Invalid response from PF; assume not compatible\n"); 94 return -EINVAL; 95 } 96 97 accel_dev->u1.vf.pf_compat_ver = pf_version; 98 return 0; 99 } 100 101 int 102 adf_vf2pf_get_capabilities(struct adf_accel_dev *accel_dev) 103 { 104 struct adf_hw_device_data *hw_data = accel_dev->hw_device; 105 struct capabilities_v3 cap_msg = { 0 }; 106 unsigned int len = sizeof(cap_msg); 107 108 if (accel_dev->u1.vf.pf_compat_ver < ADF_PFVF_COMPAT_CAPABILITIES) 109 /* The PF is too old to support the extended capabilities */ 110 return 0; 111 112 if (adf_send_vf2pf_blkmsg_req(accel_dev, 113 ADF_VF2PF_BLKMSG_REQ_CAP_SUMMARY, 114 (u8 *)&cap_msg, 115 &len)) { 116 device_printf(GET_DEV(accel_dev), 117 "QAT: Failed to get block message response\n"); 118 return -EFAULT; 119 } 120 121 switch (cap_msg.hdr.version) { 122 default: 123 /* Newer version received, handle only the know parts */ 124 fallthrough; 125 case ADF_PFVF_CAPABILITIES_V3_VERSION: 126 if (likely(len >= sizeof(struct capabilities_v3))) 127 hw_data->clock_frequency = cap_msg.frequency; 128 else 129 device_printf(GET_DEV(accel_dev), 130 "Could not get frequency"); 131 fallthrough; 132 case ADF_PFVF_CAPABILITIES_V2_VERSION: 133 if (likely(len >= sizeof(struct capabilities_v2))) { 134 hw_data->accel_capabilities_mask = cap_msg.capabilities; 135 } else { 136 device_printf(GET_DEV(accel_dev), 137 "Could not get capabilities"); 138 } 139 fallthrough; 140 case ADF_PFVF_CAPABILITIES_V1_VERSION: 141 if (likely(len >= sizeof(struct capabilities_v1))) { 142 hw_data->extended_dc_capabilities = cap_msg.ext_dc_caps; 143 } else { 144 device_printf( 145 GET_DEV(accel_dev), 146 "Capabilities message truncated to %d bytes\n", 147 len); 148 return -EFAULT; 149 } 150 } 151 152 return 0; 153 } 154 155 int 156 adf_vf2pf_get_ring_to_svc(struct adf_accel_dev *accel_dev) 157 { 158 struct ring_to_svc_map_v1 rts_map_msg = { 0 }; 159 unsigned int len = sizeof(rts_map_msg); 160 161 if (accel_dev->u1.vf.pf_compat_ver < ADF_PFVF_COMPAT_RING_TO_SVC_MAP) 162 /* Use already set default mappings */ 163 return 0; 164 165 if (adf_send_vf2pf_blkmsg_req(accel_dev, 166 ADF_VF2PF_BLKMSG_REQ_RING_SVC_MAP, 167 (u8 *)&rts_map_msg, 168 &len)) { 169 device_printf(GET_DEV(accel_dev), 170 "QAT: Failed to get block message response\n"); 171 return -EFAULT; 172 } 173 174 if (unlikely(len < sizeof(struct ring_to_svc_map_v1))) { 175 device_printf(GET_DEV(accel_dev), 176 "RING_TO_SVC message truncated to %d bytes\n", 177 len); 178 return -EFAULT; 179 } 180 181 /* Only v1 at present */ 182 accel_dev->hw_device->ring_to_svc_map = rts_map_msg.map; 183 return 0; 184 } 185