LXR dpdk/drivers/common/qat/qat

   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
  10int 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