diff options
| -rw-r--r-- | drivers/accel/habanalabs/common/debugfs.c | 210 | ||||
| -rw-r--r-- | drivers/accel/habanalabs/common/habanalabs.h | 4 |
2 files changed, 214 insertions, 0 deletions
diff --git a/drivers/accel/habanalabs/common/debugfs.c b/drivers/accel/habanalabs/common/debugfs.c index f3600df064d1..5f0820b19ccb 100644 --- a/drivers/accel/habanalabs/common/debugfs.c +++ b/drivers/accel/habanalabs/common/debugfs.c @@ -6,6 +6,7 @@ */ #include "habanalabs.h" +#include "hldio.h" #include "../include/hw_ip/mmu/mmu_general.h" #include <linux/pci.h> @@ -602,6 +603,198 @@ static int engines_show(struct seq_file *s, void *data) return 0; } +#ifdef CONFIG_HL_HLDIO +/* DIO debugfs functions following the standard pattern */ +static int dio_ssd2hl_show(struct seq_file *s, void *data) +{ + struct hl_debugfs_entry *entry = s->private; + struct hl_dbg_device_entry *dev_entry = entry->dev_entry; + struct hl_device *hdev = dev_entry->hdev; + + if (!hdev->asic_prop.supports_nvme) { + seq_puts(s, "NVMe Direct I/O not supported\\n"); + return 0; + } + + seq_puts(s, "Usage: echo \"fd=N va=0xADDR off=N len=N\" > dio_ssd2hl\n"); + seq_printf(s, "Last transfer: %zu bytes\\n", dev_entry->dio_stats.last_len_read); + seq_puts(s, "Note: All parameters must be page-aligned (4KB)\\n"); + + return 0; +} + +static ssize_t dio_ssd2hl_write(struct file *file, const char __user *buf, + size_t count, loff_t *f_pos) +{ + struct seq_file *s = file->private_data; + struct hl_debugfs_entry *entry = s->private; + struct hl_dbg_device_entry *dev_entry = entry->dev_entry; + struct hl_device *hdev = dev_entry->hdev; + struct hl_ctx *ctx = hdev->kernel_ctx; + char kbuf[128]; + u64 device_va = 0, off_bytes = 0, len_bytes = 0; + u32 fd = 0; + size_t len_read = 0; + int rc, parsed; + + if (!hdev->asic_prop.supports_nvme) + return -EOPNOTSUPP; + + if (count >= sizeof(kbuf)) + return -EINVAL; + + if (copy_from_user(kbuf, buf, count)) + return -EFAULT; + + kbuf[count] = 0; + + /* Parse: fd=N va=0xADDR off=N len=N */ + parsed = sscanf(kbuf, "fd=%u va=0x%llx off=%llu len=%llu", + &fd, &device_va, &off_bytes, &len_bytes); + if (parsed != 4) { + dev_err(hdev->dev, "Invalid format. Expected: fd=N va=0xADDR off=N len=N\\n"); + return -EINVAL; + } + + /* Validate file descriptor */ + if (fd == 0) { + dev_err(hdev->dev, "Invalid file descriptor: %u\\n", fd); + return -EINVAL; + } + + /* Validate alignment requirements */ + if (!IS_ALIGNED(device_va, PAGE_SIZE) || + !IS_ALIGNED(off_bytes, PAGE_SIZE) || + !IS_ALIGNED(len_bytes, PAGE_SIZE)) { + dev_err(hdev->dev, + "All parameters must be page-aligned (4KB)\\n"); + return -EINVAL; + } + + /* Validate transfer size */ + if (len_bytes == 0 || len_bytes > SZ_1G) { + dev_err(hdev->dev, "Invalid length: %llu (max 1GB)\\n", + len_bytes); + return -EINVAL; + } + + dev_dbg(hdev->dev, "DIO SSD2HL: fd=%u va=0x%llx off=%llu len=%llu\\n", + fd, device_va, off_bytes, len_bytes); + + rc = hl_dio_ssd2hl(hdev, ctx, fd, device_va, off_bytes, len_bytes, &len_read); + if (rc < 0) { + dev_entry->dio_stats.failed_ops++; + dev_err(hdev->dev, "SSD2HL operation failed: %d\\n", rc); + return rc; + } + + /* Update statistics */ + dev_entry->dio_stats.total_ops++; + dev_entry->dio_stats.successful_ops++; + dev_entry->dio_stats.bytes_transferred += len_read; + dev_entry->dio_stats.last_len_read = len_read; + + dev_dbg(hdev->dev, "DIO SSD2HL completed: %zu bytes transferred\\n", len_read); + + return count; +} + +static int dio_hl2ssd_show(struct seq_file *s, void *data) +{ + seq_puts(s, "HL2SSD (device-to-SSD) transfers not implemented\\n"); + return 0; +} + +static ssize_t dio_hl2ssd_write(struct file *file, const char __user *buf, + size_t count, loff_t *f_pos) +{ + struct seq_file *s = file->private_data; + struct hl_debugfs_entry *entry = s->private; + struct hl_dbg_device_entry *dev_entry = entry->dev_entry; + struct hl_device *hdev = dev_entry->hdev; + + if (!hdev->asic_prop.supports_nvme) + return -EOPNOTSUPP; + + dev_dbg(hdev->dev, "HL2SSD operation not implemented\\n"); + return -EOPNOTSUPP; +} + +static int dio_stats_show(struct seq_file *s, void *data) +{ + struct hl_debugfs_entry *entry = s->private; + struct hl_dbg_device_entry *dev_entry = entry->dev_entry; + struct hl_device *hdev = dev_entry->hdev; + struct hl_dio_stats *stats = &dev_entry->dio_stats; + u64 avg_bytes_per_op = 0, success_rate = 0; + + if (!hdev->asic_prop.supports_nvme) { + seq_puts(s, "NVMe Direct I/O not supported\\n"); + return 0; + } + + if (stats->successful_ops > 0) + avg_bytes_per_op = stats->bytes_transferred / stats->successful_ops; + + if (stats->total_ops > 0) + success_rate = (stats->successful_ops * 100) / stats->total_ops; + + seq_puts(s, "=== Habanalabs Direct I/O Statistics ===\\n"); + seq_printf(s, "Total operations: %llu\\n", stats->total_ops); + seq_printf(s, "Successful ops: %llu\\n", stats->successful_ops); + seq_printf(s, "Failed ops: %llu\\n", stats->failed_ops); + seq_printf(s, "Success rate: %llu%%\\n", success_rate); + seq_printf(s, "Total bytes: %llu\\n", stats->bytes_transferred); + seq_printf(s, "Avg bytes per op: %llu\\n", avg_bytes_per_op); + seq_printf(s, "Last transfer: %zu bytes\\n", stats->last_len_read); + + return 0; +} + +static int dio_reset_show(struct seq_file *s, void *data) +{ + seq_puts(s, "Write '1' to reset DIO statistics\\n"); + return 0; +} + +static ssize_t dio_reset_write(struct file *file, const char __user *buf, + size_t count, loff_t *f_pos) +{ + struct seq_file *s = file->private_data; + struct hl_debugfs_entry *entry = s->private; + struct hl_dbg_device_entry *dev_entry = entry->dev_entry; + struct hl_device *hdev = dev_entry->hdev; + char kbuf[8]; + unsigned long val; + int rc; + + if (!hdev->asic_prop.supports_nvme) + return -EOPNOTSUPP; + + if (count >= sizeof(kbuf)) + return -EINVAL; + + if (copy_from_user(kbuf, buf, count)) + return -EFAULT; + + kbuf[count] = 0; + + rc = kstrtoul(kbuf, 0, &val); + if (rc) + return rc; + + if (val == 1) { + memset(&dev_entry->dio_stats, 0, sizeof(dev_entry->dio_stats)); + dev_dbg(hdev->dev, "DIO statistics reset\\n"); + } else { + dev_err(hdev->dev, "Write '1' to reset statistics\\n"); + return -EINVAL; + } + + return count; +} +#endif + static ssize_t hl_memory_scrub(struct file *f, const char __user *buf, size_t count, loff_t *ppos) { @@ -1633,6 +1826,13 @@ static const struct hl_info_list hl_debugfs_list[] = { {"mmu", mmu_show, mmu_asid_va_write}, {"mmu_error", mmu_ack_error, mmu_ack_error_value_write}, {"engines", engines_show, NULL}, +#ifdef CONFIG_HL_HLDIO + /* DIO entries - only created if NVMe is supported */ + {"dio_ssd2hl", dio_ssd2hl_show, dio_ssd2hl_write}, + {"dio_stats", dio_stats_show, NULL}, + {"dio_reset", dio_reset_show, dio_reset_write}, + {"dio_hl2ssd", dio_hl2ssd_show, dio_hl2ssd_write}, +#endif }; static int hl_debugfs_open(struct inode *inode, struct file *file) @@ -1831,6 +2031,11 @@ static void add_files_to_device(struct hl_device *hdev, struct hl_dbg_device_ent &hdev->asic_prop.server_type); for (i = 0, entry = dev_entry->entry_arr ; i < count ; i++, entry++) { + /* Skip DIO entries if NVMe is not supported */ + if (strncmp(hl_debugfs_list[i].name, "dio_", 4) == 0 && + !hdev->asic_prop.supports_nvme) + continue; + debugfs_create_file(hl_debugfs_list[i].name, 0644, root, @@ -1873,6 +2078,11 @@ int hl_debugfs_device_init(struct hl_device *hdev) spin_lock_init(&hdev->debugfs_cfg_accesses.lock); hdev->debugfs_cfg_accesses.head = 0; /* already zero by alloc but explicit init is fine */ +#ifdef CONFIG_HL_HLDIO + /* Initialize DIO statistics */ + memset(&dev_entry->dio_stats, 0, sizeof(dev_entry->dio_stats)); +#endif + return 0; } diff --git a/drivers/accel/habanalabs/common/habanalabs.h b/drivers/accel/habanalabs/common/habanalabs.h index 6be185d7be58..d94c2ba22a6a 100644 --- a/drivers/accel/habanalabs/common/habanalabs.h +++ b/drivers/accel/habanalabs/common/habanalabs.h @@ -2410,6 +2410,7 @@ struct hl_debugfs_entry { * @i2c_addr: generic u8 debugfs file for address value to use in i2c_data_read. * @i2c_reg: generic u8 debugfs file for register value to use in i2c_data_read. * @i2c_len: generic u8 debugfs file for length value to use in i2c_data_read. + * @dio_stats: Direct I/O statistics */ struct hl_dbg_device_entry { struct dentry *root; @@ -2441,6 +2442,9 @@ struct hl_dbg_device_entry { u8 i2c_addr; u8 i2c_reg; u8 i2c_len; +#ifdef CONFIG_HL_HLDIO + struct hl_dio_stats dio_stats; +#endif }; /** |