drivers/crypto/qat/qat_common/adf_transport_debug.c

   1 // SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
   2 /* Copyright(c) 2014 - 2020 Intel Corporation */
   3 #include <linux/mutex.h>
   4 #include <linux/slab.h>
   5 #include <linux/seq_file.h>
   6 #include "adf_accel_devices.h"
   7 #include "adf_transport_internal.h"
   8 #include "adf_transport_access_macros.h"
   9
  10 static DEFINE_MUTEX(ring_read_lock);
  11 static DEFINE_MUTEX(bank_read_lock);
  12
  13 static void *adf_ring_start(struct seq_file *sfile, loff_t *pos)
  14 {
  15         struct adf_etr_ring_data *ring = sfile->private;
  16
  17         mutex_lock(&ring_read_lock);
  18         if (*pos == 0)
  19                 return SEQ_START_TOKEN;
  20
  21         if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
  22                      ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
  23                 return NULL;
  24
  25         return ring->base_addr +
  26                 (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
  27 }
  28
  29 static void *adf_ring_next(struct seq_file *sfile, void *v, loff_t *pos)
  30 {
  31         struct adf_etr_ring_data *ring = sfile->private;
  32
  33         if (*pos >= (ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size) /
  34                      ADF_MSG_SIZE_TO_BYTES(ring->msg_size)))
  35                 return NULL;
  36
  37         return ring->base_addr +
  38                 (ADF_MSG_SIZE_TO_BYTES(ring->msg_size) * (*pos)++);
  39 }
  40
  41 static int adf_ring_show(struct seq_file *sfile, void *v)
  42 {
  43         struct adf_etr_ring_data *ring = sfile->private;
  44         struct adf_etr_bank_data *bank = ring->bank;
  45         struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev);
  46         void __iomem *csr = ring->bank->csr_addr;
  47
  48         if (v == SEQ_START_TOKEN) {
  49                 int head, tail, empty;
  50
  51                 head = csr_ops->read_csr_ring_head(csr, bank->bank_number,
  52                                                    ring->ring_number);
  53                 tail = csr_ops->read_csr_ring_tail(csr, bank->bank_number,
  54                                                    ring->ring_number);
  55                 empty = csr_ops->read_csr_e_stat(csr, bank->bank_number);
  56
  57                 seq_puts(sfile, "------- Ring configuration -------\n");
  58                 seq_printf(sfile, "ring name: %s\n",
  59                            ring->ring_debug->ring_name);
  60                 seq_printf(sfile, "ring num %d, bank num %d\n",
  61                            ring->ring_number, ring->bank->bank_number);
  62                 seq_printf(sfile, "head %x, tail %x, empty: %d\n",
  63                            head, tail, (empty & 1 << ring->ring_number)
  64                            >> ring->ring_number);
  65                 seq_printf(sfile, "ring size %d, msg size %d\n",
  66                            ADF_SIZE_TO_RING_SIZE_IN_BYTES(ring->ring_size),
  67                            ADF_MSG_SIZE_TO_BYTES(ring->msg_size));
  68                 seq_puts(sfile, "----------- Ring data ------------\n");
  69                 return 0;
  70         }
  71         seq_hex_dump(sfile, "", DUMP_PREFIX_ADDRESS, 32, 4,
  72                      v, ADF_MSG_SIZE_TO_BYTES(ring->msg_size), false);
  73         return 0;
  74 }
  75
  76 static void adf_ring_stop(struct seq_file *sfile, void *v)
  77 {
  78         mutex_unlock(&ring_read_lock);
  79 }
  80
  81 static const struct seq_operations adf_ring_debug_sops = {
  82         .start = adf_ring_start,
  83         .next = adf_ring_next,
  84         .stop = adf_ring_stop,
  85         .show = adf_ring_show
  86 };
  87
  88 DEFINE_SEQ_ATTRIBUTE(adf_ring_debug);
  89
  90 int adf_ring_debugfs_add(struct adf_etr_ring_data *ring, const char *name)
  91 {
  92         struct adf_etr_ring_debug_entry *ring_debug;
  93         char entry_name[8];
  94
  95         ring_debug = kzalloc(sizeof(*ring_debug), GFP_KERNEL);
  96         if (!ring_debug)
  97                 return -ENOMEM;
  98
  99         strlcpy(ring_debug->ring_name, name, sizeof(ring_debug->ring_name));
 100         snprintf(entry_name, sizeof(entry_name), "ring_%02d",
 101                  ring->ring_number);
 102
 103         ring_debug->debug = debugfs_create_file(entry_name, S_IRUSR,
 104                                                 ring->bank->bank_debug_dir,
 105                                                 ring, &adf_ring_debug_fops);
 106         ring->ring_debug = ring_debug;
 107         return 0;
 108 }
 109
 110 void adf_ring_debugfs_rm(struct adf_etr_ring_data *ring)
 111 {
 112         if (ring->ring_debug) {
 113                 debugfs_remove(ring->ring_debug->debug);
 114                 kfree(ring->ring_debug);
 115                 ring->ring_debug = NULL;
 116         }
 117 }
 118
 119 static void *adf_bank_start(struct seq_file *sfile, loff_t *pos)
 120 {
 121         struct adf_etr_bank_data *bank = sfile->private;
 122         u8 num_rings_per_bank = GET_NUM_RINGS_PER_BANK(bank->accel_dev);
 123
 124         mutex_lock(&bank_read_lock);
 125         if (*pos == 0)
 126                 return SEQ_START_TOKEN;
 127
 128         if (*pos >= num_rings_per_bank)
 129                 return NULL;
 130
 131         return pos;
 132 }
 133
 134 static void *adf_bank_next(struct seq_file *sfile, void *v, loff_t *pos)
 135 {
 136         struct adf_etr_bank_data *bank = sfile->private;
 137         u8 num_rings_per_bank = GET_NUM_RINGS_PER_BANK(bank->accel_dev);
 138
 139         if (++(*pos) >= num_rings_per_bank)
 140                 return NULL;
 141
 142         return pos;
 143 }
 144
 145 static int adf_bank_show(struct seq_file *sfile, void *v)
 146 {
 147         struct adf_etr_bank_data *bank = sfile->private;
 148         struct adf_hw_csr_ops *csr_ops = GET_CSR_OPS(bank->accel_dev);
 149
 150         if (v == SEQ_START_TOKEN) {
 151                 seq_printf(sfile, "------- Bank %d configuration -------\n",
 152                            bank->bank_number);
 153         } else {
 154                 int ring_id = *((int *)v) - 1;
 155                 struct adf_etr_ring_data *ring = &bank->rings[ring_id];
 156                 void __iomem *csr = bank->csr_addr;
 157                 int head, tail, empty;
 158
 159                 if (!(bank->ring_mask & 1 << ring_id))
 160                         return 0;
 161
 162                 head = csr_ops->read_csr_ring_head(csr, bank->bank_number,
 163                                                    ring->ring_number);
 164                 tail = csr_ops->read_csr_ring_tail(csr, bank->bank_number,
 165                                                    ring->ring_number);
 166                 empty = csr_ops->read_csr_e_stat(csr, bank->bank_number);
 167
 168                 seq_printf(sfile,
 169                            "ring num %02d, head %04x, tail %04x, empty: %d\n",
 170                            ring->ring_number, head, tail,
 171                            (empty & 1 << ring->ring_number) >>
 172                            ring->ring_number);
 173         }
 174         return 0;
 175 }
 176
 177 static void adf_bank_stop(struct seq_file *sfile, void *v)
 178 {
 179         mutex_unlock(&bank_read_lock);
 180 }
 181
 182 static const struct seq_operations adf_bank_debug_sops = {
 183         .start = adf_bank_start,
 184         .next = adf_bank_next,
 185         .stop = adf_bank_stop,
 186         .show = adf_bank_show
 187 };
 188
 189 DEFINE_SEQ_ATTRIBUTE(adf_bank_debug);
 190
 191 int adf_bank_debugfs_add(struct adf_etr_bank_data *bank)
 192 {
 193         struct adf_accel_dev *accel_dev = bank->accel_dev;
 194         struct dentry *parent = accel_dev->transport->debug;
 195         char name[8];
 196
 197         snprintf(name, sizeof(name), "bank_%02d", bank->bank_number);
 198         bank->bank_debug_dir = debugfs_create_dir(name, parent);
 199         bank->bank_debug_cfg = debugfs_create_file("config", S_IRUSR,
 200                                                    bank->bank_debug_dir, bank,
 201                                                    &adf_bank_debug_fops);
 202         return 0;
 203 }
 204
 205 void adf_bank_debugfs_rm(struct adf_etr_bank_data *bank)
 206 {
 207         debugfs_remove(bank->bank_debug_cfg);
 208         debugfs_remove(bank->bank_debug_dir);
 209 }