drivers/common/qat/qat_pf2vf.c

   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
  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 }