drivers/raw/octeontx2_dma/otx2_dpi_rawdev.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(C) 2019 Marvell International Ltd.
   3  */
   4
   5 #include <string.h>
   6 #include <unistd.h>
   7
   8 #include <rte_bus.h>
   9 #include <rte_bus_pci.h>
  10 #include <rte_common.h>
  11 #include <rte_eal.h>
  12 #include <rte_lcore.h>
  13 #include <rte_pci.h>
  14 #include <rte_rawdev.h>
  15 #include <rte_rawdev_pmd.h>
  16
  17 #include <otx2_common.h>
  18
  19 static const struct rte_pci_id pci_dma_map[] = {
  20         {
  21                 RTE_PCI_DEVICE(PCI_VENDOR_ID_CAVIUM,
  22                                PCI_DEVID_OCTEONTX2_DPI_VF)
  23         },
  24         {
  25                 .vendor_id = 0,
  26         },
  27 };
  28
  29 static int
  30 otx2_dpi_rawdev_probe(struct rte_pci_driver *pci_drv __rte_unused,
  31                       struct rte_pci_device *pci_dev)
  32 {
  33         char name[RTE_RAWDEV_NAME_MAX_LEN];
  34         struct rte_rawdev *rawdev;
  35
  36         /* For secondary processes, the primary has done all the work */
  37         if (rte_eal_process_type() != RTE_PROC_PRIMARY)
  38                 return 0;
  39
  40         if (pci_dev->mem_resource[0].addr == NULL) {
  41                 otx2_dpi_dbg("Empty bars %p %p", pci_dev->mem_resource[0].addr,
  42                              pci_dev->mem_resource[2].addr);
  43                 return -ENODEV;
  44         }
  45
  46         memset(name, 0, sizeof(name));
  47         snprintf(name, RTE_RAWDEV_NAME_MAX_LEN, "DPI:%x:%02x.%x",
  48                  pci_dev->addr.bus, pci_dev->addr.devid,
  49                  pci_dev->addr.function);
  50
  51         /* Allocate device structure */
  52         rawdev = rte_rawdev_pmd_allocate(name, 0, rte_socket_id());
  53         if (rawdev == NULL) {
  54                 otx2_err("Rawdev allocation failed");
  55                 return -EINVAL;
  56         }
  57
  58         rawdev->device = &pci_dev->device;
  59         rawdev->driver_name = pci_dev->driver->driver.name;
  60
  61         return 0;
  62 }
  63
  64 static int
  65 otx2_dpi_rawdev_remove(struct rte_pci_device *pci_dev)
  66 {
  67         char name[RTE_RAWDEV_NAME_MAX_LEN];
  68         struct rte_rawdev *rawdev;
  69
  70         if (pci_dev == NULL) {
  71                 otx2_dpi_dbg("Invalid pci_dev of the device!");
  72                 return -EINVAL;
  73         }
  74
  75         memset(name, 0, sizeof(name));
  76         snprintf(name, RTE_RAWDEV_NAME_MAX_LEN, "DPI:%x:%02x.%x",
  77                  pci_dev->addr.bus, pci_dev->addr.devid,
  78                  pci_dev->addr.function);
  79
  80         rawdev = rte_rawdev_pmd_get_named_dev(name);
  81         if (rawdev == NULL) {
  82                 otx2_dpi_dbg("Invalid device name (%s)", name);
  83                 return -EINVAL;
  84         }
  85
  86         /* rte_rawdev_close is called by pmd_release */
  87         return rte_rawdev_pmd_release(rawdev);
  88 }
  89
  90 static struct rte_pci_driver rte_dpi_rawdev_pmd = {
  91         .id_table  = pci_dma_map,
  92         .drv_flags = RTE_PCI_DRV_NEED_MAPPING | RTE_PCI_DRV_IOVA_AS_VA,
  93         .probe     = otx2_dpi_rawdev_probe,
  94         .remove    = otx2_dpi_rawdev_remove,
  95 };
  96
  97 RTE_PMD_REGISTER_PCI(dpi_rawdev_pci_driver, rte_dpi_rawdev_pmd);
  98 RTE_PMD_REGISTER_PCI_TABLE(dpi_rawdev_pci_driver, pci_dma_map);
  99 RTE_PMD_REGISTER_KMOD_DEP(dpi_rawdev_pci_driver, "vfio-pci");