1 // SPDX-License-Identifier: GPL-2.0+ 2 /* Copyright (c) 2018-2019 Hisilicon Limited. */ 3 4 #include <linux/debugfs.h> 5 #include <linux/device.h> 6 7 #include "hnae3.h" 8 #include "hns3_enet.h" 9 10 #define HNS3_DBG_READ_LEN 256 11 12 static struct dentry *hns3_dbgfs_root; 13 14 static int hns3_dbg_queue_info(struct hnae3_handle *h, char *cmd_buf) 15 { 16 struct hns3_nic_priv *priv = h->priv; 17 struct hns3_nic_ring_data *ring_data; 18 struct hns3_enet_ring *ring; 19 u32 base_add_l, base_add_h; 20 u32 queue_num, queue_max; 21 u32 value, i = 0; 22 int cnt; 23 24 if (!priv->ring_data) { 25 dev_err(&h->pdev->dev, "ring_data is NULL\n"); 26 return -EFAULT; 27 } 28 29 queue_max = h->kinfo.num_tqps; 30 cnt = kstrtouint(&cmd_buf[11], 0, &queue_num); 31 if (cnt) 32 queue_num = 0; 33 else 34 queue_max = queue_num + 1; 35 36 dev_info(&h->pdev->dev, "queue info\n"); 37 38 if (queue_num >= h->kinfo.num_tqps) { 39 dev_err(&h->pdev->dev, 40 "Queue number(%u) is out of range(%u)\n", queue_num, 41 h->kinfo.num_tqps - 1); 42 return -EINVAL; 43 } 44 45 ring_data = priv->ring_data; 46 for (i = queue_num; i < queue_max; i++) { 47 /* Each cycle needs to determine whether the instance is reset, 48 * to prevent reference to invalid memory. And need to ensure 49 * that the following code is executed within 100ms. 50 */ 51 if (test_bit(HNS3_NIC_STATE_INITED, &priv->state) || 52 test_bit(HNS3_NIC_STATE_RESETTING, &priv->state)) 53 return -EPERM; 54 55 ring = ring_data[i + h->kinfo.num_tqps].ring; 56 base_add_h = readl_relaxed(ring->tqp->io_base + 57 HNS3_RING_RX_RING_BASEADDR_H_REG); 58 base_add_l = readl_relaxed(ring->tqp->io_base + 59 HNS3_RING_RX_RING_BASEADDR_L_REG); 60 dev_info(&h->pdev->dev, "RX(%d) BASE ADD: 0x%08x%08x\n", i, 61 base_add_h, base_add_l); 62 63 value = readl_relaxed(ring->tqp->io_base + 64 HNS3_RING_RX_RING_BD_NUM_REG); 65 dev_info(&h->pdev->dev, "RX(%d) RING BD NUM: %u\n", i, value); 66 67 value = readl_relaxed(ring->tqp->io_base + 68 HNS3_RING_RX_RING_BD_LEN_REG); 69 dev_info(&h->pdev->dev, "RX(%d) RING BD LEN: %u\n", i, value); 70 71 value = readl_relaxed(ring->tqp->io_base + 72 HNS3_RING_RX_RING_TAIL_REG); 73 dev_info(&h->pdev->dev, "RX(%d) RING TAIL: %u\n", i, value); 74 75 value = readl_relaxed(ring->tqp->io_base + 76 HNS3_RING_RX_RING_HEAD_REG); 77 dev_info(&h->pdev->dev, "RX(%d) RING HEAD: %u\n", i, value); 78 79 value = readl_relaxed(ring->tqp->io_base + 80 HNS3_RING_RX_RING_FBDNUM_REG); 81 dev_info(&h->pdev->dev, "RX(%d) RING FBDNUM: %u\n", i, value); 82 83 value = readl_relaxed(ring->tqp->io_base + 84 HNS3_RING_RX_RING_PKTNUM_RECORD_REG); 85 dev_info(&h->pdev->dev, "RX(%d) RING PKTNUM: %u\n", i, value); 86 87 ring = ring_data[i].ring; 88 base_add_h = readl_relaxed(ring->tqp->io_base + 89 HNS3_RING_TX_RING_BASEADDR_H_REG); 90 base_add_l = readl_relaxed(ring->tqp->io_base + 91 HNS3_RING_TX_RING_BASEADDR_L_REG); 92 dev_info(&h->pdev->dev, "TX(%d) BASE ADD: 0x%08x%08x\n", i, 93 base_add_h, base_add_l); 94 95 value = readl_relaxed(ring->tqp->io_base + 96 HNS3_RING_TX_RING_BD_NUM_REG); 97 dev_info(&h->pdev->dev, "TX(%d) RING BD NUM: %u\n", i, value); 98 99 value = readl_relaxed(ring->tqp->io_base + 100 HNS3_RING_TX_RING_TC_REG); 101 dev_info(&h->pdev->dev, "TX(%d) RING TC: %u\n", i, value); 102 103 value = readl_relaxed(ring->tqp->io_base + 104 HNS3_RING_TX_RING_TAIL_REG); 105 dev_info(&h->pdev->dev, "TX(%d) RING TAIL: %u\n", i, value); 106 107 value = readl_relaxed(ring->tqp->io_base + 108 HNS3_RING_TX_RING_HEAD_REG); 109 dev_info(&h->pdev->dev, "TX(%d) RING HEAD: %u\n", i, value); 110 111 value = readl_relaxed(ring->tqp->io_base + 112 HNS3_RING_TX_RING_FBDNUM_REG); 113 dev_info(&h->pdev->dev, "TX(%d) RING FBDNUM: %u\n", i, value); 114 115 value = readl_relaxed(ring->tqp->io_base + 116 HNS3_RING_TX_RING_OFFSET_REG); 117 dev_info(&h->pdev->dev, "TX(%d) RING OFFSET: %u\n", i, value); 118 119 value = readl_relaxed(ring->tqp->io_base + 120 HNS3_RING_TX_RING_PKTNUM_RECORD_REG); 121 dev_info(&h->pdev->dev, "TX(%d) RING PKTNUM: %u\n\n", i, 122 value); 123 } 124 125 return 0; 126 } 127 128 static void hns3_dbg_help(struct hnae3_handle *h) 129 { 130 dev_info(&h->pdev->dev, "available commands\n"); 131 dev_info(&h->pdev->dev, "queue info [number]\n"); 132 dev_info(&h->pdev->dev, "dump fd tcam\n"); 133 dev_info(&h->pdev->dev, "dump tc\n"); 134 dev_info(&h->pdev->dev, "dump tm\n"); 135 dev_info(&h->pdev->dev, "dump qos pause cfg\n"); 136 dev_info(&h->pdev->dev, "dump qos pri map\n"); 137 dev_info(&h->pdev->dev, "dump qos buf cfg\n"); 138 } 139 140 static ssize_t hns3_dbg_cmd_read(struct file *filp, char __user *buffer, 141 size_t count, loff_t *ppos) 142 { 143 int uncopy_bytes; 144 char *buf; 145 int len; 146 147 if (*ppos != 0) 148 return 0; 149 150 if (count < HNS3_DBG_READ_LEN) 151 return -ENOSPC; 152 153 buf = kzalloc(HNS3_DBG_READ_LEN, GFP_KERNEL); 154 if (!buf) 155 return -ENOMEM; 156 157 len = snprintf(buf, HNS3_DBG_READ_LEN, "%s\n", 158 "Please echo help to cmd to get help information"); 159 uncopy_bytes = copy_to_user(buffer, buf, len); 160 161 kfree(buf); 162 163 if (uncopy_bytes) 164 return -EFAULT; 165 166 return (*ppos = len); 167 } 168 169 static ssize_t hns3_dbg_cmd_write(struct file *filp, const char __user *buffer, 170 size_t count, loff_t *ppos) 171 { 172 struct hnae3_handle *handle = filp->private_data; 173 struct hns3_nic_priv *priv = handle->priv; 174 char *cmd_buf, *cmd_buf_tmp; 175 int uncopied_bytes; 176 int ret = 0; 177 178 if (*ppos != 0) 179 return 0; 180 181 /* Judge if the instance is being reset. */ 182 if (test_bit(HNS3_NIC_STATE_INITED, &priv->state) || 183 test_bit(HNS3_NIC_STATE_RESETTING, &priv->state)) 184 return 0; 185 186 cmd_buf = kzalloc(count + 1, GFP_KERNEL); 187 if (!cmd_buf) 188 return count; 189 190 uncopied_bytes = copy_from_user(cmd_buf, buffer, count); 191 if (uncopied_bytes) { 192 kfree(cmd_buf); 193 return -EFAULT; 194 } 195 196 cmd_buf[count] = '\0'; 197 198 cmd_buf_tmp = strchr(cmd_buf, '\n'); 199 if (cmd_buf_tmp) { 200 *cmd_buf_tmp = '\0'; 201 count = cmd_buf_tmp - cmd_buf + 1; 202 } 203 204 if (strncmp(cmd_buf, "help", 4) == 0) 205 hns3_dbg_help(handle); 206 else if (strncmp(cmd_buf, "queue info", 10) == 0) 207 ret = hns3_dbg_queue_info(handle, cmd_buf); 208 else if (handle->ae_algo->ops->dbg_run_cmd) 209 ret = handle->ae_algo->ops->dbg_run_cmd(handle, cmd_buf); 210 211 if (ret) 212 hns3_dbg_help(handle); 213 214 kfree(cmd_buf); 215 cmd_buf = NULL; 216 217 return count; 218 } 219 220 static const struct file_operations hns3_dbg_cmd_fops = { 221 .owner = THIS_MODULE, 222 .open = simple_open, 223 .read = hns3_dbg_cmd_read, 224 .write = hns3_dbg_cmd_write, 225 }; 226 227 void hns3_dbg_init(struct hnae3_handle *handle) 228 { 229 const char *name = pci_name(handle->pdev); 230 struct dentry *pfile; 231 232 handle->hnae3_dbgfs = debugfs_create_dir(name, hns3_dbgfs_root); 233 if (!handle->hnae3_dbgfs) 234 return; 235 236 pfile = debugfs_create_file("cmd", 0600, handle->hnae3_dbgfs, handle, 237 &hns3_dbg_cmd_fops); 238 if (!pfile) { 239 debugfs_remove_recursive(handle->hnae3_dbgfs); 240 handle->hnae3_dbgfs = NULL; 241 dev_warn(&handle->pdev->dev, "create file for %s fail\n", 242 name); 243 } 244 } 245 246 void hns3_dbg_uninit(struct hnae3_handle *handle) 247 { 248 debugfs_remove_recursive(handle->hnae3_dbgfs); 249 handle->hnae3_dbgfs = NULL; 250 } 251 252 void hns3_dbg_register_debugfs(const char *debugfs_dir_name) 253 { 254 hns3_dbgfs_root = debugfs_create_dir(debugfs_dir_name, NULL); 255 if (!hns3_dbgfs_root) { 256 pr_warn("Register debugfs for %s fail\n", debugfs_dir_name); 257 return; 258 } 259 } 260 261 void hns3_dbg_unregister_debugfs(void) 262 { 263 debugfs_remove_recursive(hns3_dbgfs_root); 264 hns3_dbgfs_root = NULL; 265 } 266