1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2021 Intel Corporation
3 */
4
5 #include "qat_pf2vf.h"
6 #include "adf_pf2vf_msg.h"
7
8 #include <rte_cycles.h>
9
qat_pf2vf_exch_msg(struct qat_pci_device * qat_dev,struct qat_pf2vf_msg pf2vf_msg,int len,uint8_t * ret)10 int qat_pf2vf_exch_msg(struct qat_pci_device *qat_dev,
11 struct qat_pf2vf_msg pf2vf_msg,
12 int len, uint8_t *ret)
13 {
14 int i = 0;
15 struct qat_pf2vf_dev *qat_pf2vf =
16 qat_gen_config[qat_dev->qat_dev_gen].pf2vf_dev;
17 void *pmisc_bar_addr = qat_dev->misc_bar_io_addr;
18 uint32_t msg = 0, count = 0, val = 0;
19 uint32_t vf_csr_off = qat_pf2vf->vf2pf_offset;
20 uint32_t pf_csr_off = qat_pf2vf->pf2vf_offset;
21 int type_shift = qat_pf2vf->pf2vf_type_shift;
22 uint32_t type_mask = qat_pf2vf->pf2vf_type_mask;
23 int blck_hdr_shift = qat_pf2vf->pf2vf_data_shift;
24 int data_shift = blck_hdr_shift;
25
26 switch (pf2vf_msg.msg_type) {
27 case ADF_VF2PF_MSGTYPE_GET_SMALL_BLOCK_REQ:
28 data_shift += ADF_VF2PF_SMALL_BLOCK_BYTE_NUM_SHIFT;
29 break;
30 case ADF_VF2PF_MSGTYPE_GET_MEDIUM_BLOCK_REQ:
31 data_shift += ADF_VF2PF_MEDIUM_BLOCK_BYTE_NUM_SHIFT;
32 break;
33 case ADF_VF2PF_MSGTYPE_GET_LARGE_BLOCK_REQ:
34 data_shift += ADF_VF2PF_LARGE_BLOCK_BYTE_NUM_SHIFT;
35 break;
36 }
37
38 if ((pf2vf_msg.msg_type & type_mask) != pf2vf_msg.msg_type) {
39 QAT_LOG(ERR, "PF2VF message type 0x%X out of range\n",
40 pf2vf_msg.msg_type);
41 return -EINVAL;
42 }
43
44 for (; i < len; i++) {
45 count = 0;
46 if (len == 1) {
47 msg = (pf2vf_msg.msg_type << type_shift) |
48 (pf2vf_msg.msg_data << (data_shift));
49 } else
50 msg = (pf2vf_msg.msg_type << type_shift) |
51 ((pf2vf_msg.msg_data + i) << (data_shift));
52 if (pf2vf_msg.block_hdr > 0)
53 msg |= pf2vf_msg.block_hdr << blck_hdr_shift;
54 msg |= ADF_PFVF_INT | ADF_PFVF_MSGORIGIN_SYSTEM;
55
56 ADF_CSR_WR(pmisc_bar_addr, vf_csr_off, msg);
57 /*
58 * Wait for confirmation from remote that it received
59 * the message
60 */
61 do {
62 rte_delay_us_sleep(5);
63 val = ADF_CSR_RD(pmisc_bar_addr, vf_csr_off);
64 } while ((val & ADF_PFVF_INT) &&
65 (++count < ADF_IOV_MSG_ACK_MAX_RETRY));
66
67 if (val & ADF_PFVF_INT) {
68 QAT_LOG(ERR, "ACK not received from remote\n");
69 return -EIO;
70 }
71
72 uint32_t pf_val = ADF_CSR_RD(pmisc_bar_addr, pf_csr_off);
73
74 *(ret + i) = (uint8_t)(pf_val >> (pf2vf_msg.block_hdr > 0 ?
75 10 : 8) & 0xff);
76 }
77 return 0;
78 }
79