drivers/raw/ioat/ioat_common.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2020 Intel Corporation
   3  */
   4
   5 #include <rte_rawdev_pmd.h>
   6 #include <rte_memzone.h>
   7 #include <rte_common.h>
   8
   9 #include "ioat_private.h"
  10
  11 int
  12 idxd_rawdev_close(struct rte_rawdev *dev __rte_unused)
  13 {
  14         return 0;
  15 }
  16
  17 int
  18 idxd_dev_dump(struct rte_rawdev *dev, FILE *f)
  19 {
  20         struct idxd_rawdev *idxd = dev->dev_private;
  21         struct rte_idxd_rawdev *rte_idxd = &idxd->public;
  22         int i;
  23
  24         fprintf(f, "Raw Device #%d\n", dev->dev_id);
  25         fprintf(f, "Driver: %s\n\n", dev->driver_name);
  26
  27         fprintf(f, "Portal: %p\n", rte_idxd->portal);
  28         fprintf(f, "Batch Ring size: %u\n", rte_idxd->batch_ring_sz);
  29         fprintf(f, "Comp Handle Ring size: %u\n\n", rte_idxd->hdl_ring_sz);
  30
  31         fprintf(f, "Next batch: %u\n", rte_idxd->next_batch);
  32         fprintf(f, "Next batch to be completed: %u\n", rte_idxd->next_completed);
  33         for (i = 0; i < rte_idxd->batch_ring_sz; i++) {
  34                 struct rte_idxd_desc_batch *b = &rte_idxd->batch_ring[i];
  35                 fprintf(f, "Batch %u @%p: submitted=%u, op_count=%u, hdl_end=%u\n",
  36                                 i, b, b->submitted, b->op_count, b->hdl_end);
  37         }
  38
  39         fprintf(f, "\n");
  40         fprintf(f, "Next free hdl: %u\n", rte_idxd->next_free_hdl);
  41         fprintf(f, "Last completed hdl: %u\n", rte_idxd->last_completed_hdl);
  42         fprintf(f, "Next returned hdl: %u\n", rte_idxd->next_ret_hdl);
  43
  44         return 0;
  45 }
  46
  47 int
  48 idxd_dev_configure(const struct rte_rawdev *dev,
  49                 rte_rawdev_obj_t config, size_t config_size)
  50 {
  51         struct idxd_rawdev *idxd = dev->dev_private;
  52         struct rte_idxd_rawdev *rte_idxd = &idxd->public;
  53         struct rte_ioat_rawdev_config *cfg = config;
  54         uint16_t max_desc = cfg->ring_size;
  55         uint16_t max_batches = max_desc / BATCH_SIZE;
  56         uint16_t i;
  57
  58         if (config_size != sizeof(*cfg))
  59                 return -EINVAL;
  60
  61         if (dev->started) {
  62                 IOAT_PMD_ERR("%s: Error, device is started.", __func__);
  63                 return -EAGAIN;
  64         }
  65
  66         rte_idxd->hdls_disable = cfg->hdls_disable;
  67
  68         /* limit the batches to what can be stored in hardware */
  69         if (max_batches > idxd->max_batches) {
  70                 IOAT_PMD_DEBUG("Ring size of %u is too large for this device, need to limit to %u batches of %u",
  71                                 max_desc, idxd->max_batches, BATCH_SIZE);
  72                 max_batches = idxd->max_batches;
  73                 max_desc = max_batches * BATCH_SIZE;
  74         }
  75         if (!rte_is_power_of_2(max_desc))
  76                 max_desc = rte_align32pow2(max_desc);
  77         IOAT_PMD_DEBUG("Rawdev %u using %u descriptors in %u batches",
  78                         dev->dev_id, max_desc, max_batches);
  79
  80         /* in case we are reconfiguring a device, free any existing memory */
  81         rte_free(rte_idxd->batch_ring);
  82         rte_free(rte_idxd->hdl_ring);
  83
  84         rte_idxd->batch_ring = rte_zmalloc(NULL,
  85                         sizeof(*rte_idxd->batch_ring) * max_batches, 0);
  86         if (rte_idxd->batch_ring == NULL)
  87                 return -ENOMEM;
  88
  89         rte_idxd->hdl_ring = rte_zmalloc(NULL,
  90                         sizeof(*rte_idxd->hdl_ring) * max_desc, 0);
  91         if (rte_idxd->hdl_ring == NULL) {
  92                 rte_free(rte_idxd->batch_ring);
  93                 rte_idxd->batch_ring = NULL;
  94                 return -ENOMEM;
  95         }
  96         rte_idxd->batch_ring_sz = max_batches;
  97         rte_idxd->hdl_ring_sz = max_desc;
  98
  99         for (i = 0; i < rte_idxd->batch_ring_sz; i++) {
 100                 struct rte_idxd_desc_batch *b = &rte_idxd->batch_ring[i];
 101                 b->batch_desc.completion = rte_mem_virt2iova(&b->comp);
 102                 b->batch_desc.desc_addr = rte_mem_virt2iova(&b->null_desc);
 103                 b->batch_desc.op_flags = (idxd_op_batch << IDXD_CMD_OP_SHIFT) |
 104                                 IDXD_FLAG_COMPLETION_ADDR_VALID |
 105                                 IDXD_FLAG_REQUEST_COMPLETION;
 106         }
 107
 108         return 0;
 109 }
 110
 111 int
 112 idxd_rawdev_create(const char *name, struct rte_device *dev,
 113                    const struct idxd_rawdev *base_idxd,
 114                    const struct rte_rawdev_ops *ops)
 115 {
 116         struct idxd_rawdev *idxd;
 117         struct rte_rawdev *rawdev = NULL;
 118         const struct rte_memzone *mz = NULL;
 119         char mz_name[RTE_MEMZONE_NAMESIZE];
 120         int ret = 0;
 121
 122         RTE_BUILD_BUG_ON(sizeof(struct rte_idxd_hw_desc) != 64);
 123         RTE_BUILD_BUG_ON(offsetof(struct rte_idxd_hw_desc, size) != 32);
 124         RTE_BUILD_BUG_ON(sizeof(struct rte_idxd_completion) != 32);
 125
 126         if (!name) {
 127                 IOAT_PMD_ERR("Invalid name of the device!");
 128                 ret = -EINVAL;
 129                 goto cleanup;
 130         }
 131
 132         /* Allocate device structure */
 133         rawdev = rte_rawdev_pmd_allocate(name, sizeof(struct idxd_rawdev),
 134                                          dev->numa_node);
 135         if (rawdev == NULL) {
 136                 IOAT_PMD_ERR("Unable to allocate raw device");
 137                 ret = -ENOMEM;
 138                 goto cleanup;
 139         }
 140
 141         snprintf(mz_name, sizeof(mz_name), "rawdev%u_private", rawdev->dev_id);
 142         mz = rte_memzone_reserve(mz_name, sizeof(struct idxd_rawdev),
 143                         dev->numa_node, RTE_MEMZONE_IOVA_CONTIG);
 144         if (mz == NULL) {
 145                 IOAT_PMD_ERR("Unable to reserve memzone for private data\n");
 146                 ret = -ENOMEM;
 147                 goto cleanup;
 148         }
 149         rawdev->dev_private = mz->addr;
 150         rawdev->dev_ops = ops;
 151         rawdev->device = dev;
 152         rawdev->driver_name = IOAT_PMD_RAWDEV_NAME_STR;
 153
 154         idxd = rawdev->dev_private;
 155         *idxd = *base_idxd; /* copy over the main fields already passed in */
 156         idxd->public.type = RTE_IDXD_DEV;
 157         idxd->rawdev = rawdev;
 158         idxd->mz = mz;
 159
 160         return 0;
 161
 162 cleanup:
 163         if (rawdev)
 164                 rte_rawdev_pmd_release(rawdev);
 165
 166         return ret;
 167 }