Re: [PATCH v3 14/15] habanalabs: add debugfs support

From: Mike Rapoport
Date: Wed Feb 06 2019 - 10:16:24 EST

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In reply to: Oded Gabbay: "[PATCH v3 14/15] habanalabs: add debugfs support"
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On Mon, Feb 04, 2019 at 10:32:53PM +0200, Oded Gabbay wrote:
> This patch adds debugfs support to the driver. It allows the user-space to
> display information that is contained in the internal structures of the
> driver, such as:
> - active command submissions
> - active user virtual memory mappings
> - number of allocated command buffers
>
> It also enables the user to perform reads and writes through Goya's PCI
> bars.
>
> Signed-off-by: Oded Gabbay <oded.gabbay@xxxxxxxxx>

Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>

> ---
> Changes in v3:
> - Adjust code to huge page optimization
>
> .../ABI/testing/debugfs-driver-habanalabs | 127 ++
> drivers/misc/habanalabs/Makefile | 2 +
> drivers/misc/habanalabs/command_buffer.c | 4 +
> drivers/misc/habanalabs/command_submission.c | 12 +
> drivers/misc/habanalabs/debugfs.c | 1071 +++++++++++++++++
> drivers/misc/habanalabs/device.c | 6 +
> drivers/misc/habanalabs/goya/goya.c | 108 ++
> drivers/misc/habanalabs/goya/goyaP.h | 5 +
> drivers/misc/habanalabs/habanalabs.h | 190 +++
> drivers/misc/habanalabs/habanalabs_drv.c | 16 +-
> drivers/misc/habanalabs/memory.c | 8 +
> 11 files changed, 1547 insertions(+), 2 deletions(-)
> create mode 100644 Documentation/ABI/testing/debugfs-driver-habanalabs
> create mode 100644 drivers/misc/habanalabs/debugfs.c
>
> diff --git a/Documentation/ABI/testing/debugfs-driver-habanalabs b/Documentation/ABI/testing/debugfs-driver-habanalabs
> new file mode 100644
> index 000000000000..2b606c84938c
> --- /dev/null
> +++ b/Documentation/ABI/testing/debugfs-driver-habanalabs
> @@ -0,0 +1,127 @@
> +What: /sys/kernel/debug/habanalabs/hl<n>/addr
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets the device address to be used for read or write through
> + PCI bar. The acceptable value is a string that starts with "0x"
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/command_buffers
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays a list with information about the currently allocated
> + command buffers
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/command_submission
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays a list with information about the currently active
> + command submissions
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/command_submission_jobs
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays a list with detailed information about each JOB (CB) of
> + each active command submission
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/data32
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Allows the root user to read or write directly through the
> + device's PCI bar. Writing to this file generates a write
> + transaction while reading from the file generates a read
> + transcation. This custom interface is needed (instead of using
> + the generic Linux user-space PCI mapping) because the DDR bar
> + is very small compared to the DDR memory and only the driver can
> + move the bar before and after the transaction
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/device
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Enables the root user to set the device to specific state.
> + Valid values are "disable", "enable", "suspend", "resume".
> + User can read this property to see the valid values
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/i2c_addr
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets I2C device address for I2C transaction that is generated
> + by the device's CPU
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/i2c_bus
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets I2C bus address for I2C transaction that is generated by
> + the device's CPU
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/i2c_data
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Triggers an I2C transaction that is generated by the device's
> + CPU. Writing to this file generates a write transaction while
> + reading from the file generates a read transcation
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/i2c_reg
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets I2C register id for I2C transaction that is generated by
> + the device's CPU
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/led0
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets the state of the first S/W led on the device
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/led1
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets the state of the second S/W led on the device
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/led2
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets the state of the third S/W led on the device
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/mmu
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays the hop values and physical address for a given ASID
> + and virtual address. The user should write the ASID and VA into
> + the file and then read the file to get the result.
> + e.g. to display info about VA 0x1000 for ASID 1 you need to do:
> + echo "1 0x1000" > /sys/kernel/debug/habanalabs/hl0/mmu
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/set_power_state
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Sets the PCI power state. Valid values are "1" for D0 and "2"
> + for D3Hot
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/userptr
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays a list with information about the currently user
> + pointers (user virtual addresses) that are pinned and mapped
> + to DMA addresses
> +
> +What: /sys/kernel/debug/habanalabs/hl<n>/vm
> +Date: Jan 2019
> +KernelVersion: 5.1
> +Contact: oded.gabbay@xxxxxxxxx
> +Description: Displays a list with information about all the active virtual
> + address mappings per ASID
> +
> diff --git a/drivers/misc/habanalabs/Makefile b/drivers/misc/habanalabs/Makefile
> index 2698bb6a2355..625046487aa0 100644
> --- a/drivers/misc/habanalabs/Makefile
> +++ b/drivers/misc/habanalabs/Makefile
> @@ -8,6 +8,8 @@ habanalabs-y := habanalabs_drv.o device.o context.o asid.o habanalabs_ioctl.o \
> command_buffer.o hw_queue.o irq.o sysfs.o hwmon.o memory.o \
> command_submission.o mmu.o
>
> +habanalabs-$(CONFIG_DEBUG_FS) += debugfs.o
> +
> include $(src)/goya/Makefile
> habanalabs-y += $(HL_GOYA_FILES)
>
> diff --git a/drivers/misc/habanalabs/command_buffer.c b/drivers/misc/habanalabs/command_buffer.c
> index c70b548a7b8a..607f6abc7f3f 100644
> --- a/drivers/misc/habanalabs/command_buffer.c
> +++ b/drivers/misc/habanalabs/command_buffer.c
> @@ -36,6 +36,8 @@ static void cb_release(struct kref *ref)
> cb = container_of(ref, struct hl_cb, refcount);
> hdev = cb->hdev;
>
> + hl_debugfs_remove_cb(cb);
> +
> cb_do_release(hdev, cb);
> }
>
> @@ -153,6 +155,8 @@ int hl_cb_create(struct hl_device *hdev, struct hl_cb_mgr *mgr,
> *handle = cb->id | HL_MMAP_CB_MASK;
> *handle <<= PAGE_SHIFT;
>
> + hl_debugfs_add_cb(cb);
> +
> return 0;
>
> release_cb:
> diff --git a/drivers/misc/habanalabs/command_submission.c b/drivers/misc/habanalabs/command_submission.c
> index 288dddc14873..e539ac0a4ca3 100644
> --- a/drivers/misc/habanalabs/command_submission.c
> +++ b/drivers/misc/habanalabs/command_submission.c
> @@ -153,6 +153,8 @@ static void free_job(struct hl_device *hdev, struct hl_cs_job *job)
> list_del(&job->cs_node);
> spin_unlock(&cs->job_lock);
>
> + hl_debugfs_remove_job(hdev, job);
> +
> if (job->ext_queue)
> cs_put(cs);
>
> @@ -216,6 +218,12 @@ static void cs_do_release(struct kref *ref)
> }
> }
>
> + /*
> + * Must be called before hl_ctx_put because inside we use ctx to get
> + * the device
> + */
> + hl_debugfs_remove_cs(cs);
> +
> hl_ctx_put(cs->ctx);
>
> if (cs->timedout)
> @@ -484,6 +492,8 @@ static int _hl_cs_ioctl(struct hl_fpriv *hpriv, void __user *chunks,
>
> *cs_seq = cs->sequence;
>
> + hl_debugfs_add_cs(cs);
> +
> /* Validate ALL the CS chunks before submitting the CS */
> for (i = 0, parse_cnt = 0 ; i < num_chunks ; i++, parse_cnt++) {
> struct hl_cs_chunk *chunk = &cs_chunk_array[i];
> @@ -532,6 +542,8 @@ static int _hl_cs_ioctl(struct hl_fpriv *hpriv, void __user *chunks,
> if (job->ext_queue)
> cs_get(cs);
>
> + hl_debugfs_add_job(hdev, job);
> +
> rc = cs_parser(hpriv, job);
> if (rc) {
> dev_err(hdev->dev,
> diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c
> new file mode 100644
> index 000000000000..f7f2c1e14dfa
> --- /dev/null
> +++ b/drivers/misc/habanalabs/debugfs.c
> @@ -0,0 +1,1071 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +/*
> + * Copyright 2016-2018 HabanaLabs, Ltd.
> + * All Rights Reserved.
> + */
> +
> +#include "habanalabs.h"
> +#include "include/hw_ip/mmu/mmu_general.h"
> +
> +#include <linux/debugfs.h>
> +#include <linux/uaccess.h>
> +
> +#define MMU_ADDR_BUF_SIZE 40
> +#define MMU_ASID_BUF_SIZE 10
> +#define MMU_KBUF_SIZE (MMU_ADDR_BUF_SIZE + MMU_ASID_BUF_SIZE)
> +
> +static struct dentry *hl_debug_root;
> +
> +static int hl_debugfs_i2c_read(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr,
> + u8 i2c_reg, u32 *val)
> +{
> + struct armcp_packet pkt;
> + int rc;
> +
> + if (hl_device_disabled_or_in_reset(hdev))
> + return 0;
> +
> + memset(&pkt, 0, sizeof(pkt));
> +
> + pkt.ctl = ARMCP_PACKET_I2C_RD << ARMCP_PKT_CTL_OPCODE_SHIFT;
> + pkt.i2c_bus = i2c_bus;
> + pkt.i2c_addr = i2c_addr;
> + pkt.i2c_reg = i2c_reg;
> +
> + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
> + HL_DEVICE_TIMEOUT_USEC, (long *) val);
> +
> + if (rc)
> + dev_err(hdev->dev, "Failed to read from I2C, error %d\n", rc);
> +
> + return rc;
> +}
> +
> +static int hl_debugfs_i2c_write(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr,
> + u8 i2c_reg, u32 val)
> +{
> + struct armcp_packet pkt;
> + int rc;
> +
> + if (hl_device_disabled_or_in_reset(hdev))
> + return 0;
> +
> + memset(&pkt, 0, sizeof(pkt));
> +
> + pkt.ctl = ARMCP_PACKET_I2C_WR << ARMCP_PKT_CTL_OPCODE_SHIFT;
> + pkt.i2c_bus = i2c_bus;
> + pkt.i2c_addr = i2c_addr;
> + pkt.i2c_reg = i2c_reg;
> + pkt.value = val;
> +
> + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
> + HL_DEVICE_TIMEOUT_USEC, NULL);
> +
> + if (rc)
> + dev_err(hdev->dev, "Failed to write to I2C, error %d\n", rc);
> +
> + return rc;
> +}
> +
> +static void hl_debugfs_led_set(struct hl_device *hdev, u8 led, u8 state)
> +{
> + struct armcp_packet pkt;
> + int rc;
> +
> + if (hl_device_disabled_or_in_reset(hdev))
> + return;
> +
> + memset(&pkt, 0, sizeof(pkt));
> +
> + pkt.ctl = ARMCP_PACKET_LED_SET << ARMCP_PKT_CTL_OPCODE_SHIFT;
> + pkt.led_index = led;
> + pkt.value = state;
> +
> + rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
> + HL_DEVICE_TIMEOUT_USEC, NULL);
> +
> + if (rc)
> + dev_err(hdev->dev, "Failed to set LED %d, error %d\n", led, rc);
> +}
> +
> +static int command_buffers_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_cb *cb;
> + bool first = true;
> +
> + spin_lock(&dev_entry->cb_spinlock);
> +
> + list_for_each_entry(cb, &dev_entry->cb_list, debugfs_list) {
> + if (first) {
> + first = false;
> + seq_puts(s, "\n");
> + seq_puts(s, " CB ID CTX ID CB size CB RefCnt mmap? CS counter\n");
> + seq_puts(s, "---------------------------------------------------------------\n");
> + }
> + seq_printf(s,
> + " %03d %d 0x%08x %d %d %d\n",
> + cb->id, cb->ctx_id, cb->size,
> + kref_read(&cb->refcount),
> + cb->mmap, cb->cs_cnt);
> + }
> +
> + spin_unlock(&dev_entry->cb_spinlock);
> +
> + if (!first)
> + seq_puts(s, "\n");
> +
> + return 0;
> +}
> +
> +static int command_submission_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_cs *cs;
> + bool first = true;
> +
> + spin_lock(&dev_entry->cs_spinlock);
> +
> + list_for_each_entry(cs, &dev_entry->cs_list, debugfs_list) {
> + if (first) {
> + first = false;
> + seq_puts(s, "\n");
> + seq_puts(s, " CS ID CTX ASID CS RefCnt Submitted Completed\n");
> + seq_puts(s, "------------------------------------------------------\n");
> + }
> + seq_printf(s,
> + " %llu %d %d %d %d\n",
> + cs->sequence, cs->ctx->asid,
> + kref_read(&cs->refcount),
> + cs->submitted, cs->completed);
> + }
> +
> + spin_unlock(&dev_entry->cs_spinlock);
> +
> + if (!first)
> + seq_puts(s, "\n");
> +
> + return 0;
> +}
> +
> +static int command_submission_jobs_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_cs_job *job;
> + bool first = true;
> +
> + spin_lock(&dev_entry->cs_job_spinlock);
> +
> + list_for_each_entry(job, &dev_entry->cs_job_list, debugfs_list) {
> + if (first) {
> + first = false;
> + seq_puts(s, "\n");
> + seq_puts(s, " JOB ID CS ID CTX ASID H/W Queue\n");
> + seq_puts(s, "---------------------------------------\n");
> + }
> + if (job->cs)
> + seq_printf(s,
> + " %02d %llu %d %d\n",
> + job->id, job->cs->sequence, job->cs->ctx->asid,
> + job->hw_queue_id);
> + else
> + seq_printf(s,
> + " %02d 0 %d %d\n",
> + job->id, HL_KERNEL_ASID_ID, job->hw_queue_id);
> + }
> +
> + spin_unlock(&dev_entry->cs_job_spinlock);
> +
> + if (!first)
> + seq_puts(s, "\n");
> +
> + return 0;
> +}
> +
> +static int userptr_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_userptr *userptr;
> + char dma_dir[4][30] = {"DMA_BIDIRECTIONAL", "DMA_TO_DEVICE",
> + "DMA_FROM_DEVICE", "DMA_NONE"};
> + bool first = true;
> +
> + spin_lock(&dev_entry->userptr_spinlock);
> +
> + list_for_each_entry(userptr, &dev_entry->userptr_list, debugfs_list) {
> + if (first) {
> + first = false;
> + seq_puts(s, "\n");
> + seq_puts(s, " user virtual address size dma dir\n");
> + seq_puts(s, "----------------------------------------------------------\n");
> + }
> + seq_printf(s,
> + " 0x%-14llx %-10u %-30s\n",
> + userptr->addr, userptr->size, dma_dir[userptr->dir]);
> + }
> +
> + spin_unlock(&dev_entry->userptr_spinlock);
> +
> + if (!first)
> + seq_puts(s, "\n");
> +
> + return 0;
> +}
> +
> +static int vm_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_ctx *ctx;
> + struct hl_vm *vm;
> + struct hl_vm_hash_node *hnode;
> + struct hl_userptr *userptr;
> + struct hl_vm_phys_pg_pack *phys_pg_pack = NULL;
> + enum vm_type_t *vm_type;
> + bool once = true;
> + int i;
> +
> + if (!dev_entry->hdev->mmu_enable)
> + return 0;
> +
> + spin_lock(&dev_entry->ctx_mem_hash_spinlock);
> +
> + list_for_each_entry(ctx, &dev_entry->ctx_mem_hash_list, debugfs_list) {
> + once = false;
> + seq_puts(s, "\n\n----------------------------------------------------");
> + seq_puts(s, "\n----------------------------------------------------\n\n");
> + seq_printf(s, "ctx asid: %u\n", ctx->asid);
> +
> + seq_puts(s, "\nmappings:\n\n");
> + seq_puts(s, " virtual address size handle\n");
> + seq_puts(s, "----------------------------------------------------\n");
> + mutex_lock(&ctx->mem_hash_lock);
> + hash_for_each(ctx->mem_hash, i, hnode, node) {
> + vm_type = hnode->ptr;
> +
> + if (*vm_type == VM_TYPE_USERPTR) {
> + userptr = hnode->ptr;
> + seq_printf(s,
> + " 0x%-14llx %-10u\n",
> + hnode->vaddr, userptr->size);
> + } else {
> + phys_pg_pack = hnode->ptr;
> + seq_printf(s,
> + " 0x%-14llx %-10u %-4u\n",
> + hnode->vaddr, phys_pg_pack->total_size,
> + phys_pg_pack->handle);
> + }
> + }
> + mutex_unlock(&ctx->mem_hash_lock);
> +
> + vm = &ctx->hdev->vm;
> + spin_lock(&vm->idr_lock);
> +
> + if (!idr_is_empty(&vm->phys_pg_pack_handles))
> + seq_puts(s, "\n\nallocations:\n");
> +
> + idr_for_each_entry(&vm->phys_pg_pack_handles, phys_pg_pack, i) {
> + if (phys_pg_pack->asid != ctx->asid)
> + continue;
> +
> + seq_printf(s, "\nhandle: %u\n", phys_pg_pack->handle);
> + seq_printf(s, "page size: %u\n\n",
> + phys_pg_pack->page_size);
> + seq_puts(s, " physical address\n");
> + seq_puts(s, "---------------------\n");
> + for (i = 0 ; i < phys_pg_pack->npages ; i++) {
> + seq_printf(s, " 0x%-14llx\n",
> + phys_pg_pack->pages[i]);
> + }
> + }
> + spin_unlock(&vm->idr_lock);
> +
> + }
> +
> + spin_unlock(&dev_entry->ctx_mem_hash_spinlock);
> +
> + if (!once)
> + seq_puts(s, "\n");
> +
> + return 0;
> +}
> +
> +/* these inline functions are copied from mmu.c */
> +static inline u64 get_hop0_addr(struct hl_ctx *ctx)
> +{
> + return ctx->hdev->asic_prop.mmu_pgt_addr +
> + (ctx->asid * ctx->hdev->asic_prop.mmu_hop_table_size);
> +}
> +
> +static inline u64 get_hop0_pte_addr(struct hl_ctx *ctx, u64 hop_addr,
> + u64 virt_addr)
> +{
> + return hop_addr + ctx->hdev->asic_prop.mmu_pte_size *
> + ((virt_addr & HOP0_MASK) >> HOP0_SHIFT);
> +}
> +
> +static inline u64 get_hop1_pte_addr(struct hl_ctx *ctx, u64 hop_addr,
> + u64 virt_addr)
> +{
> + return hop_addr + ctx->hdev->asic_prop.mmu_pte_size *
> + ((virt_addr & HOP1_MASK) >> HOP1_SHIFT);
> +}
> +
> +static inline u64 get_hop2_pte_addr(struct hl_ctx *ctx, u64 hop_addr,
> + u64 virt_addr)
> +{
> + return hop_addr + ctx->hdev->asic_prop.mmu_pte_size *
> + ((virt_addr & HOP2_MASK) >> HOP2_SHIFT);
> +}
> +
> +static inline u64 get_hop3_pte_addr(struct hl_ctx *ctx, u64 hop_addr,
> + u64 virt_addr)
> +{
> + return hop_addr + ctx->hdev->asic_prop.mmu_pte_size *
> + ((virt_addr & HOP3_MASK) >> HOP3_SHIFT);
> +}
> +
> +static inline u64 get_hop4_pte_addr(struct hl_ctx *ctx, u64 hop_addr,
> + u64 virt_addr)
> +{
> + return hop_addr + ctx->hdev->asic_prop.mmu_pte_size *
> + ((virt_addr & HOP4_MASK) >> HOP4_SHIFT);
> +}
> +
> +static inline u64 get_next_hop_addr(u64 curr_pte)
> +{
> + if (curr_pte & PAGE_PRESENT_MASK)
> + return curr_pte & PHYS_ADDR_MASK;
> + else
> + return ULLONG_MAX;
> +}
> +
> +static int mmu_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_ctx *ctx = hdev->user_ctx;
> +
> + u64 hop0_addr = 0, hop0_pte_addr = 0, hop0_pte = 0,
> + hop1_addr = 0, hop1_pte_addr = 0, hop1_pte = 0,
> + hop2_addr = 0, hop2_pte_addr = 0, hop2_pte = 0,
> + hop3_addr = 0, hop3_pte_addr = 0, hop3_pte = 0,
> + hop4_addr = 0, hop4_pte_addr = 0, hop4_pte = 0,
> + virt_addr = dev_entry->mmu_addr;
> +
> + if (!hdev->mmu_enable)
> + return 0;
> +
> + if (!ctx) {
> + dev_err(hdev->dev, "no ctx available\n");
> + return 0;
> + }
> +
> + mutex_lock(&ctx->mmu_lock);
> +
> + /* the following lookup is copied from unmap() in mmu.c */
> +
> + hop0_addr = get_hop0_addr(ctx);
> + hop0_pte_addr = get_hop0_pte_addr(ctx, hop0_addr, virt_addr);
> + hop0_pte = hdev->asic_funcs->read_pte(hdev, hop0_pte_addr);
> + hop1_addr = get_next_hop_addr(hop0_pte);
> +
> + if (hop1_addr == ULLONG_MAX)
> + goto not_mapped;
> +
> + hop1_pte_addr = get_hop1_pte_addr(ctx, hop1_addr, virt_addr);
> + hop1_pte = hdev->asic_funcs->read_pte(hdev, hop1_pte_addr);
> + hop2_addr = get_next_hop_addr(hop1_pte);
> +
> + if (hop2_addr == ULLONG_MAX)
> + goto not_mapped;
> +
> + hop2_pte_addr = get_hop2_pte_addr(ctx, hop2_addr, virt_addr);
> + hop2_pte = hdev->asic_funcs->read_pte(hdev, hop2_pte_addr);
> + hop3_addr = get_next_hop_addr(hop2_pte);
> +
> + if (hop3_addr == ULLONG_MAX)
> + goto not_mapped;
> +
> + hop3_pte_addr = get_hop3_pte_addr(ctx, hop3_addr, virt_addr);
> + hop3_pte = hdev->asic_funcs->read_pte(hdev, hop3_pte_addr);
> +
> + if (!(hop3_pte & LAST_MASK)) {
> + hop4_addr = get_next_hop_addr(hop3_pte);
> +
> + if (hop4_addr == ULLONG_MAX)
> + goto not_mapped;
> +
> + hop4_pte_addr = get_hop4_pte_addr(ctx, hop4_addr, virt_addr);
> + hop4_pte = hdev->asic_funcs->read_pte(hdev, hop4_pte_addr);
> + if (!(hop4_pte & PAGE_PRESENT_MASK))
> + goto not_mapped;
> + } else {
> + if (!(hop3_pte & PAGE_PRESENT_MASK))
> + goto not_mapped;
> + }
> +
> + seq_printf(s, "asid: %u, virt_addr: 0x%llx\n",
> + dev_entry->mmu_asid, dev_entry->mmu_addr);
> +
> + seq_printf(s, "hop0_addr: 0x%llx\n", hop0_addr);
> + seq_printf(s, "hop0_pte_addr: 0x%llx\n", hop0_pte_addr);
> + seq_printf(s, "hop0_pte: 0x%llx\n", hop0_pte);
> +
> + seq_printf(s, "hop1_addr: 0x%llx\n", hop1_addr);
> + seq_printf(s, "hop1_pte_addr: 0x%llx\n", hop1_pte_addr);
> + seq_printf(s, "hop1_pte: 0x%llx\n", hop1_pte);
> +
> + seq_printf(s, "hop2_addr: 0x%llx\n", hop2_addr);
> + seq_printf(s, "hop2_pte_addr: 0x%llx\n", hop2_pte_addr);
> + seq_printf(s, "hop2_pte: 0x%llx\n", hop2_pte);
> +
> + seq_printf(s, "hop3_addr: 0x%llx\n", hop3_addr);
> + seq_printf(s, "hop3_pte_addr: 0x%llx\n", hop3_pte_addr);
> + seq_printf(s, "hop3_pte: 0x%llx\n", hop3_pte);
> +
> + if (!(hop3_pte & LAST_MASK)) {
> + seq_printf(s, "hop4_addr: 0x%llx\n", hop4_addr);
> + seq_printf(s, "hop4_pte_addr: 0x%llx\n", hop4_pte_addr);
> + seq_printf(s, "hop4_pte: 0x%llx\n", hop4_pte);
> + }
> +
> + goto out;
> +
> +not_mapped:
> + dev_err(hdev->dev, "virt addr 0x%llx is not mapped to phys addr\n",
> + virt_addr);
> +out:
> + mutex_unlock(&ctx->mmu_lock);
> +
> + return 0;
> +}
> +
> +static ssize_t mmu_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[MMU_KBUF_SIZE], asid_kbuf[MMU_ASID_BUF_SIZE],
> + addr_kbuf[MMU_ADDR_BUF_SIZE];
> + char *c;
> + ssize_t rc;
> +
> + if (!hdev->mmu_enable)
> + return count;
> +
> + memset(kbuf, 0, sizeof(kbuf));
> + memset(asid_kbuf, 0, sizeof(asid_kbuf));
> + memset(addr_kbuf, 0, sizeof(addr_kbuf));
> +
> + if (copy_from_user(kbuf, buf, count))
> + goto err;
> +
> + kbuf[MMU_KBUF_SIZE - 1] = 0;
> +
> + c = strchr(kbuf, ' ');
> + if (!c)
> + goto err;
> +
> + memcpy(asid_kbuf, kbuf, c - kbuf);
> +
> + rc = kstrtouint(asid_kbuf, 10, &dev_entry->mmu_asid);
> + if (rc)
> + goto err;
> +
> + c = strstr(kbuf, " 0x");
> + if (!c)
> + goto err;
> +
> + c += 3;
> + memcpy(addr_kbuf, c, (kbuf + count) - c);
> +
> + rc = kstrtoull(addr_kbuf, 16, &dev_entry->mmu_addr);
> + if (rc)
> + goto err;
> +
> + return count;
> +
> +err:
> + dev_err(hdev->dev, "usage: echo <asid> <0xaddr> > mmu\n");
> +
> + return -EINVAL;
> +}
> +
> +static ssize_t hl_data_read32(struct file *f, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + char tmp_buf[32];
> + u32 val;
> + ssize_t rc;
> +
> + if (*ppos)
> + return 0;
> +
> + rc = hdev->asic_funcs->debugfs_read32(hdev, entry->addr, &val);
> + if (rc) {
> + dev_err(hdev->dev, "Failed to read from 0x%010llx\n",
> + entry->addr);
> + return rc;
> + }
> +
> + sprintf(tmp_buf, "0x%08x\n", val);
> + rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
> + strlen(tmp_buf) + 1);
> +
> + return rc;
> +}
> +
> +static ssize_t hl_data_write32(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 16, &value);
> + if (rc)
> + return rc;
> +
> + rc = hdev->asic_funcs->debugfs_write32(hdev, entry->addr, value);
> + if (rc) {
> + dev_err(hdev->dev, "Failed to write 0x%08x to 0x%010llx\n",
> + value, entry->addr);
> + return rc;
> + }
> +
> + return count;
> +}
> +
> +static ssize_t hl_get_power_state(struct file *f, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + char tmp_buf[200];
> + ssize_t rc;
> + int i;
> +
> + if (*ppos)
> + return 0;
> +
> + if (hdev->pdev->current_state == PCI_D0)
> + i = 1;
> + else if (hdev->pdev->current_state == PCI_D3hot)
> + i = 2;
> + else
> + i = 3;
> +
> + sprintf(tmp_buf,
> + "current power state: %d\n1 - D0\n2 - D3hot\n3 - Unknown\n", i);
> + rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
> + strlen(tmp_buf) + 1);
> +
> + return rc;
> +}
> +
> +static ssize_t hl_set_power_state(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 10, &value);
> + if (rc)
> + return rc;
> +
> + if (value == 1) {
> + pci_set_power_state(hdev->pdev, PCI_D0);
> + pci_restore_state(hdev->pdev);
> + rc = pci_enable_device(hdev->pdev);
> + } else if (value == 2) {
> + pci_save_state(hdev->pdev);
> + pci_disable_device(hdev->pdev);
> + pci_set_power_state(hdev->pdev, PCI_D3hot);
> + } else {
> + dev_dbg(hdev->dev, "invalid power state value %u\n", value);
> + return -EINVAL;
> + }
> +
> + return count;
> +}
> +
> +static ssize_t hl_i2c_data_read(struct file *f, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + char tmp_buf[32];
> + u32 val;
> + ssize_t rc;
> +
> + if (*ppos)
> + return 0;
> +
> + rc = hl_debugfs_i2c_read(hdev, entry->i2c_bus, entry->i2c_addr,
> + entry->i2c_reg, &val);
> + if (rc) {
> + dev_err(hdev->dev,
> + "Failed to read from I2C bus %d, addr %d, reg %d\n",
> + entry->i2c_bus, entry->i2c_addr, entry->i2c_reg);
> + return rc;
> + }
> +
> + sprintf(tmp_buf, "0x%02x\n", val);
> + rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
> + strlen(tmp_buf) + 1);
> +
> + return rc;
> +}
> +
> +static ssize_t hl_i2c_data_write(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 16, &value);
> + if (rc)
> + return rc;
> +
> + rc = hl_debugfs_i2c_write(hdev, entry->i2c_bus, entry->i2c_addr,
> + entry->i2c_reg, value);
> + if (rc) {
> + dev_err(hdev->dev,
> + "Failed to write 0x%02x to I2C bus %d, addr %d, reg %d\n",
> + value, entry->i2c_bus, entry->i2c_addr, entry->i2c_reg);
> + return rc;
> + }
> +
> + return count;
> +}
> +
> +static ssize_t hl_led0_write(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 10, &value);
> + if (rc)
> + return rc;
> +
> + value = value ? 1 : 0;
> +
> + hl_debugfs_led_set(hdev, 0, value);
> +
> + return count;
> +}
> +
> +static ssize_t hl_led1_write(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 10, &value);
> + if (rc)
> + return rc;
> +
> + value = value ? 1 : 0;
> +
> + hl_debugfs_led_set(hdev, 1, value);
> +
> + return count;
> +}
> +
> +static ssize_t hl_led2_write(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> + u32 value;
> + ssize_t rc;
> +
> + rc = kstrtouint_from_user(buf, count, 10, &value);
> + if (rc)
> + return rc;
> +
> + value = value ? 1 : 0;
> +
> + hl_debugfs_led_set(hdev, 2, value);
> +
> + return count;
> +}
> +
> +static ssize_t hl_device_read(struct file *f, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + char tmp_buf[200];
> + ssize_t rc;
> +
> + if (*ppos)
> + return 0;
> +
> + sprintf(tmp_buf,
> + "Valid values are: disable, enable, suspend, resume\n");
> + rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
> + strlen(tmp_buf) + 1);
> +
> + return rc;
> +}
> +
> +static ssize_t hl_device_write(struct file *f, const char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
> + struct hl_device *hdev = entry->hdev;
> +
> + if (strncmp("disable", buf, strlen("disable")) == 0) {
> + hdev->disabled = true;
> + } else if (strncmp("enable", buf, strlen("enable")) == 0) {
> + hdev->disabled = false;
> + } else if (strncmp("suspend", buf, strlen("suspend")) == 0) {
> + hdev->asic_funcs->suspend(hdev);
> + } else if (strncmp("resume", buf, strlen("resume")) == 0) {
> + hdev->asic_funcs->resume(hdev);
> + } else {
> + dev_err(hdev->dev,
> + "Valid values are: disable, enable, suspend, resume\n");
> + count = -EINVAL;
> + }
> +
> + return count;
> +}
> +
> +static const struct file_operations hl_data32b_fops = {
> + .owner = THIS_MODULE,
> + .read = hl_data_read32,
> + .write = hl_data_write32
> +};
> +
> +static const struct file_operations hl_i2c_data_fops = {
> + .owner = THIS_MODULE,
> + .read = hl_i2c_data_read,
> + .write = hl_i2c_data_write
> +};
> +
> +static const struct file_operations hl_power_fops = {
> + .owner = THIS_MODULE,
> + .read = hl_get_power_state,
> + .write = hl_set_power_state
> +};
> +
> +static const struct file_operations hl_led0_fops = {
> + .owner = THIS_MODULE,
> + .write = hl_led0_write
> +};
> +
> +static const struct file_operations hl_led1_fops = {
> + .owner = THIS_MODULE,
> + .write = hl_led1_write
> +};
> +
> +static const struct file_operations hl_led2_fops = {
> + .owner = THIS_MODULE,
> + .write = hl_led2_write
> +};
> +
> +static const struct file_operations hl_device_fops = {
> + .owner = THIS_MODULE,
> + .read = hl_device_read,
> + .write = hl_device_write
> +};
> +
> +static const struct hl_info_list hl_debugfs_list[] = {
> + {"command_buffers", command_buffers_show, NULL},
> + {"command_submission", command_submission_show, NULL},
> + {"command_submission_jobs", command_submission_jobs_show, NULL},
> + {"userptr", userptr_show, NULL},
> + {"vm", vm_show, NULL},
> + {"mmu", mmu_show, mmu_write},
> +};
> +
> +static int hl_debugfs_open(struct inode *inode, struct file *file)
> +{
> + struct hl_debugfs_entry *node = inode->i_private;
> +
> + return single_open(file, node->info_ent->show, node);
> +}
> +
> +static ssize_t hl_debugfs_write(struct file *file, const char __user *buf,
> + size_t count, loff_t *f_pos)
> +{
> + struct hl_debugfs_entry *node = file->f_inode->i_private;
> +
> + if (node->info_ent->write)
> + return node->info_ent->write(file, buf, count, f_pos);
> + else
> + return -EINVAL;
> +
> +}
> +
> +static const struct file_operations hl_debugfs_fops = {
> + .owner = THIS_MODULE,
> + .open = hl_debugfs_open,
> + .read = seq_read,
> + .write = hl_debugfs_write,
> + .llseek = seq_lseek,
> + .release = single_release,
> +};
> +
> +void hl_debugfs_add_device(struct hl_device *hdev)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> + int count = ARRAY_SIZE(hl_debugfs_list);
> + struct hl_debugfs_entry *entry;
> + struct dentry *ent;
> + int i;
> +
> + dev_entry->hdev = hdev;
> + dev_entry->entry_arr = kmalloc_array(count,
> + sizeof(struct hl_debugfs_entry),
> + GFP_KERNEL);
> + if (!dev_entry->entry_arr)
> + return;
> +
> + INIT_LIST_HEAD(&dev_entry->file_list);
> + INIT_LIST_HEAD(&dev_entry->cb_list);
> + INIT_LIST_HEAD(&dev_entry->cs_list);
> + INIT_LIST_HEAD(&dev_entry->cs_job_list);
> + INIT_LIST_HEAD(&dev_entry->userptr_list);
> + INIT_LIST_HEAD(&dev_entry->ctx_mem_hash_list);
> + mutex_init(&dev_entry->file_mutex);
> + spin_lock_init(&dev_entry->cb_spinlock);
> + spin_lock_init(&dev_entry->cs_spinlock);
> + spin_lock_init(&dev_entry->cs_job_spinlock);
> + spin_lock_init(&dev_entry->userptr_spinlock);
> + spin_lock_init(&dev_entry->ctx_mem_hash_spinlock);
> +
> + dev_entry->root = debugfs_create_dir(dev_name(hdev->dev),
> + hl_debug_root);
> +
> + debugfs_create_x64("addr",
> + 0644,
> + dev_entry->root,
> + &dev_entry->addr);
> +
> + debugfs_create_file("data32",
> + 0644,
> + dev_entry->root,
> + dev_entry,
> + &hl_data32b_fops);
> +
> + debugfs_create_file("set_power_state",
> + 0200,
> + dev_entry->root,
> + dev_entry,
> + &hl_power_fops);
> +
> + debugfs_create_u8("i2c_bus",
> + 0644,
> + dev_entry->root,
> + &dev_entry->i2c_bus);
> +
> + debugfs_create_u8("i2c_addr",
> + 0644,
> + dev_entry->root,
> + &dev_entry->i2c_addr);
> +
> + debugfs_create_u8("i2c_reg",
> + 0644,
> + dev_entry->root,
> + &dev_entry->i2c_reg);
> +
> + debugfs_create_file("i2c_data",
> + 0644,
> + dev_entry->root,
> + dev_entry,
> + &hl_i2c_data_fops);
> +
> + debugfs_create_file("led0",
> + 0200,
> + dev_entry->root,
> + dev_entry,
> + &hl_led0_fops);
> +
> + debugfs_create_file("led1",
> + 0200,
> + dev_entry->root,
> + dev_entry,
> + &hl_led1_fops);
> +
> + debugfs_create_file("led2",
> + 0200,
> + dev_entry->root,
> + dev_entry,
> + &hl_led2_fops);
> +
> + debugfs_create_file("device",
> + 0200,
> + dev_entry->root,
> + dev_entry,
> + &hl_device_fops);
> +
> + for (i = 0, entry = dev_entry->entry_arr ; i < count ; i++, entry++) {
> +
> + ent = debugfs_create_file(hl_debugfs_list[i].name,
> + 0444,
> + dev_entry->root,
> + entry,
> + &hl_debugfs_fops);
> + entry->dent = ent;
> + entry->info_ent = &hl_debugfs_list[i];
> + entry->dev_entry = dev_entry;
> + }
> +}
> +
> +void hl_debugfs_remove_device(struct hl_device *hdev)
> +{
> + struct hl_dbg_device_entry *entry = &hdev->hl_debugfs;
> +
> + debugfs_remove_recursive(entry->root);
> +
> + mutex_destroy(&entry->file_mutex);
> + kfree(entry->entry_arr);
> +}
> +
> +void hl_debugfs_add_file(struct hl_fpriv *hpriv)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hpriv->hdev->hl_debugfs;
> +
> + mutex_lock(&dev_entry->file_mutex);
> + list_add(&hpriv->debugfs_list, &dev_entry->file_list);
> + mutex_unlock(&dev_entry->file_mutex);
> +}
> +
> +void hl_debugfs_remove_file(struct hl_fpriv *hpriv)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hpriv->hdev->hl_debugfs;
> +
> + mutex_lock(&dev_entry->file_mutex);
> + list_del(&hpriv->debugfs_list);
> + mutex_unlock(&dev_entry->file_mutex);
> +}
> +
> +void hl_debugfs_add_cb(struct hl_cb *cb)
> +{
> + struct hl_dbg_device_entry *dev_entry = &cb->hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cb_spinlock);
> + list_add(&cb->debugfs_list, &dev_entry->cb_list);
> + spin_unlock(&dev_entry->cb_spinlock);
> +}
> +
> +void hl_debugfs_remove_cb(struct hl_cb *cb)
> +{
> + struct hl_dbg_device_entry *dev_entry = &cb->hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cb_spinlock);
> + list_del(&cb->debugfs_list);
> + spin_unlock(&dev_entry->cb_spinlock);
> +}
> +
> +void hl_debugfs_add_cs(struct hl_cs *cs)
> +{
> + struct hl_dbg_device_entry *dev_entry = &cs->ctx->hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cs_spinlock);
> + list_add(&cs->debugfs_list, &dev_entry->cs_list);
> + spin_unlock(&dev_entry->cs_spinlock);
> +}
> +
> +void hl_debugfs_remove_cs(struct hl_cs *cs)
> +{
> + struct hl_dbg_device_entry *dev_entry = &cs->ctx->hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cs_spinlock);
> + list_del(&cs->debugfs_list);
> + spin_unlock(&dev_entry->cs_spinlock);
> +}
> +
> +void hl_debugfs_add_job(struct hl_device *hdev, struct hl_cs_job *job)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cs_job_spinlock);
> + list_add(&job->debugfs_list, &dev_entry->cs_job_list);
> + spin_unlock(&dev_entry->cs_job_spinlock);
> +}
> +
> +void hl_debugfs_remove_job(struct hl_device *hdev, struct hl_cs_job *job)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->cs_job_spinlock);
> + list_del(&job->debugfs_list);
> + spin_unlock(&dev_entry->cs_job_spinlock);
> +}
> +
> +void hl_debugfs_add_userptr(struct hl_device *hdev, struct hl_userptr *userptr)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->userptr_spinlock);
> + list_add(&userptr->debugfs_list, &dev_entry->userptr_list);
> + spin_unlock(&dev_entry->userptr_spinlock);
> +}
> +
> +void hl_debugfs_remove_userptr(struct hl_device *hdev,
> + struct hl_userptr *userptr)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->userptr_spinlock);
> + list_del(&userptr->debugfs_list);
> + spin_unlock(&dev_entry->userptr_spinlock);
> +}
> +
> +void hl_debugfs_add_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->ctx_mem_hash_spinlock);
> + list_add(&ctx->debugfs_list, &dev_entry->ctx_mem_hash_list);
> + spin_unlock(&dev_entry->ctx_mem_hash_spinlock);
> +}
> +
> +void hl_debugfs_remove_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx)
> +{
> + struct hl_dbg_device_entry *dev_entry = &hdev->hl_debugfs;
> +
> + spin_lock(&dev_entry->ctx_mem_hash_spinlock);
> + list_del(&ctx->debugfs_list);
> + spin_unlock(&dev_entry->ctx_mem_hash_spinlock);
> +}
> +
> +int __init hl_debugfs_init(void)
> +{
> + hl_debug_root = debugfs_create_dir("habanalabs", NULL);
> + if (IS_ERR_OR_NULL(hl_debug_root)) {
> + pr_err("can not create debugfs directory\n");
> + hl_debug_root = NULL;
> + return -ENOMEM;
> + }
> +
> + return 0;
> +}
> +
> +void hl_debugfs_fini(void)
> +{
> + debugfs_remove_recursive(hl_debug_root);
> +}
> diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c
> index c667b2507c4d..1ec5e10cc36d 100644
> --- a/drivers/misc/habanalabs/device.c
> +++ b/drivers/misc/habanalabs/device.c
> @@ -30,6 +30,8 @@ static void hpriv_release(struct kref *ref)
>
> put_pid(hpriv->taskpid);
>
> + hl_debugfs_remove_file(hpriv);
> +
> mutex_destroy(&hpriv->restore_phase_mutex);
>
> kfree(hpriv);
> @@ -823,6 +825,8 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
> goto free_cb_pool;
> }
>
> + hl_debugfs_add_device(hdev);
> +
> rc = hdev->asic_funcs->hw_init(hdev);
> if (rc) {
> dev_err(hdev->dev, "failed to initialize the H/W\n");
> @@ -950,6 +954,8 @@ void hl_device_fini(struct hl_device *hdev)
>
> device_late_fini(hdev);
>
> + hl_debugfs_remove_device(hdev);
> +
> hl_sysfs_fini(hdev);
>
> /*
> diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
> index 3e858f499013..2db0c4f0f7e0 100644
> --- a/drivers/misc/habanalabs/goya/goya.c
> +++ b/drivers/misc/habanalabs/goya/goya.c
> @@ -4358,6 +4358,8 @@ int goya_context_switch(struct hl_device *hdev, u32 asid)
> job->user_cb_size = cb_size;
> job->hw_queue_id = GOYA_QUEUE_ID_DMA_0;
>
> + hl_debugfs_add_job(hdev, job);
> +
> parser.ctx_id = HL_KERNEL_ASID_ID;
> parser.cs_sequence = 0;
> parser.job_id = job->id;
> @@ -4390,6 +4392,7 @@ int goya_context_switch(struct hl_device *hdev, u32 asid)
>
> free_job:
> hl_userptr_delete_list(hdev, &job->userptr_list);
> + hl_debugfs_remove_job(hdev, job);
> kfree(job);
> cb->cs_cnt--;
>
> @@ -4420,6 +4423,106 @@ void goya_restore_phase_topology(struct hl_device *hdev)
> i = RREG32(mmSYNC_MNGR_SOB_OBJ_0);
> }
>
> +/*
> + * goya_debugfs_read32 - read a 32bit value from a given device address
> + *
> + * @hdev: pointer to hl_device structure
> + * @addr: address in device
> + * @val: returned value
> + *
> + * In case of DDR address that is not mapped into the default aperture that
> + * the DDR bar exposes, the function will configure the iATU so that the DDR
> + * bar will be positioned at a base address that allows reading from the
> + * required address. Configuring the iATU during normal operation can
> + * lead to undefined behavior and therefore, should be done with extreme care
> + *
> + */
> +int goya_debugfs_read32(struct hl_device *hdev, u64 addr, u32 *val)
> +{
> + struct asic_fixed_properties *prop = &hdev->asic_prop;
> + int rc = 0;
> +
> + if ((addr >= CFG_BASE) && (addr < CFG_BASE + CFG_SIZE)) {
> + *val = RREG32(addr - CFG_BASE);
> +
> + } else if ((addr >= SRAM_BASE_ADDR) &&
> + (addr < SRAM_BASE_ADDR + SRAM_SIZE)) {
> +
> + *val = readl(hdev->pcie_bar[SRAM_CFG_BAR_ID] +
> + (addr - SRAM_BASE_ADDR));
> +
> + } else if ((addr >= DRAM_PHYS_BASE) &&
> + (addr < DRAM_PHYS_BASE + hdev->asic_prop.dram_size)) {
> +
> + u64 bar_base_addr = DRAM_PHYS_BASE +
> + (addr & ~(prop->dram_pci_bar_size - 0x1ull));
> +
> + rc = goya_set_ddr_bar_base(hdev, bar_base_addr);
> + if (!rc) {
> + *val = readl(hdev->pcie_bar[DDR_BAR_ID] +
> + (addr - bar_base_addr));
> +
> + rc = goya_set_ddr_bar_base(hdev, DRAM_PHYS_BASE +
> + (MMU_PAGE_TABLES_ADDR &
> + ~(prop->dram_pci_bar_size - 0x1ull)));
> + }
> + } else {
> + rc = -EFAULT;
> + }
> +
> + return rc;
> +}
> +
> +/*
> + * goya_debugfs_write32 - write a 32bit value to a given device address
> + *
> + * @hdev: pointer to hl_device structure
> + * @addr: address in device
> + * @val: returned value
> + *
> + * In case of DDR address that is not mapped into the default aperture that
> + * the DDR bar exposes, the function will configure the iATU so that the DDR
> + * bar will be positioned at a base address that allows writing to the
> + * required address. Configuring the iATU during normal operation can
> + * lead to undefined behavior and therefore, should be done with extreme care
> + *
> + */
> +int goya_debugfs_write32(struct hl_device *hdev, u64 addr, u32 val)
> +{
> + struct asic_fixed_properties *prop = &hdev->asic_prop;
> + int rc = 0;
> +
> + if ((addr >= CFG_BASE) && (addr < CFG_BASE + CFG_SIZE)) {
> + WREG32(addr - CFG_BASE, val);
> +
> + } else if ((addr >= SRAM_BASE_ADDR) &&
> + (addr < SRAM_BASE_ADDR + SRAM_SIZE)) {
> +
> + writel(val, hdev->pcie_bar[SRAM_CFG_BAR_ID] +
> + (addr - SRAM_BASE_ADDR));
> +
> + } else if ((addr >= DRAM_PHYS_BASE) &&
> + (addr < DRAM_PHYS_BASE + hdev->asic_prop.dram_size)) {
> +
> + u64 bar_base_addr = DRAM_PHYS_BASE +
> + (addr & ~(prop->dram_pci_bar_size - 0x1ull));
> +
> + rc = goya_set_ddr_bar_base(hdev, bar_base_addr);
> + if (!rc) {
> + writel(val, hdev->pcie_bar[DDR_BAR_ID] +
> + (addr - bar_base_addr));
> +
> + rc = goya_set_ddr_bar_base(hdev, DRAM_PHYS_BASE +
> + (MMU_PAGE_TABLES_ADDR &
> + ~(prop->dram_pci_bar_size - 0x1ull)));
> + }
> + } else {
> + rc = -EFAULT;
> + }
> +
> + return rc;
> +}
> +
> static u64 goya_read_pte(struct hl_device *hdev, u64 addr)
> {
> struct goya_device *goya = hdev->asic_specific;
> @@ -4766,6 +4869,8 @@ static int goya_mmu_clear_pgt_range(struct hl_device *hdev)
> job->user_cb_size = cb_size;
> job->hw_queue_id = GOYA_QUEUE_ID_DMA_0;
>
> + hl_debugfs_add_job(hdev, job);
> +
> parser.ctx_id = HL_KERNEL_ASID_ID;
> parser.cs_sequence = 0;
> parser.job_id = job->id;
> @@ -4794,6 +4899,7 @@ static int goya_mmu_clear_pgt_range(struct hl_device *hdev)
>
> free_job:
> hl_userptr_delete_list(hdev, &job->userptr_list);
> + hl_debugfs_remove_job(hdev, job);
> kfree(job);
> cb->cs_cnt--;
>
> @@ -5203,6 +5309,8 @@ static const struct hl_asic_funcs goya_funcs = {
> .update_eq_ci = goya_update_eq_ci,
> .context_switch = goya_context_switch,
> .restore_phase_topology = goya_restore_phase_topology,
> + .debugfs_read32 = goya_debugfs_read32,
> + .debugfs_write32 = goya_debugfs_write32,
> .add_device_attr = goya_add_device_attr,
> .remove_device_attr = goya_remove_device_attr,
> .handle_eqe = goya_handle_eqe,
> diff --git a/drivers/misc/habanalabs/goya/goyaP.h b/drivers/misc/habanalabs/goya/goyaP.h
> index 6d2da801c155..569015857c59 100644
> --- a/drivers/misc/habanalabs/goya/goyaP.h
> +++ b/drivers/misc/habanalabs/goya/goyaP.h
> @@ -168,6 +168,10 @@ struct goya_device {
> u32 hw_cap_initialized;
> };
>
> +int goya_debugfs_i2c_read(struct hl_device *hdev, u8 i2c_bus,
> + u8 i2c_addr, u8 i2c_reg, u32 *val);
> +int goya_debugfs_i2c_write(struct hl_device *hdev, u8 i2c_bus,
> + u8 i2c_addr, u8 i2c_reg, u32 val);
> int goya_test_cpu_queue(struct hl_device *hdev);
> int goya_send_cpu_message(struct hl_device *hdev, u32 *msg, u16 len,
> u32 timeout, long *result);
> @@ -178,6 +182,7 @@ long goya_get_fan_speed(struct hl_device *hdev, int sensor_index, u32 attr);
> long goya_get_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr);
> void goya_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
> long value);
> +void goya_debugfs_led_set(struct hl_device *hdev, u8 led, u8 state);
> void goya_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq);
> int goya_add_device_attr(struct hl_device *hdev);
> void goya_remove_device_attr(struct hl_device *hdev);
> diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h
> index fc33026974c9..a4258a6847c4 100644
> --- a/drivers/misc/habanalabs/habanalabs.h
> +++ b/drivers/misc/habanalabs/habanalabs.h
> @@ -225,6 +225,7 @@ struct hl_cb_mgr {
> * @refcount: reference counter for usage of the CB.
> * @hdev: pointer to device this CB belongs to.
> * @lock: spinlock to protect mmap/cs flows.
> + * @debugfs_list: node in debugfs list of command buffers.
> * @pool_list: node in pool list of command buffers.
> * @kernel_address: Holds the CB's kernel virtual address.
> * @bus_address: Holds the CB's DMA address.
> @@ -241,6 +242,7 @@ struct hl_cb {
> struct kref refcount;
> struct hl_device *hdev;
> spinlock_t lock;
> + struct list_head debugfs_list;
> struct list_head pool_list;
> u64 kernel_address;
> dma_addr_t bus_address;
> @@ -442,6 +444,8 @@ enum hl_pll_frequency {
> * @update_eq_ci: update event queue CI.
> * @context_switch: called upon ASID context switch.
> * @restore_phase_topology: clear all SOBs amd MONs.
> + * @debugfs_read32: debug interface for reading u32 from DRAM/SRAM.
> + * @debugfs_write32: debug interface for writing u32 to DRAM/SRAM.
> * @add_device_attr: add ASIC specific device attributes.
> * @remove_device_attr: remove ASIC specific device attributes.
> * @handle_eqe: handle event queue entry (IRQ) from ArmCP.
> @@ -510,6 +514,8 @@ struct hl_asic_funcs {
> void (*update_eq_ci)(struct hl_device *hdev, u32 val);
> int (*context_switch)(struct hl_device *hdev, u32 asid);
> void (*restore_phase_topology)(struct hl_device *hdev);
> + int (*debugfs_read32)(struct hl_device *hdev, u64 addr, u32 *val);
> + int (*debugfs_write32)(struct hl_device *hdev, u64 addr, u32 val);
> int (*add_device_attr)(struct hl_device *hdev);
> void (*remove_device_attr)(struct hl_device *hdev);
> void (*handle_eqe)(struct hl_device *hdev,
> @@ -572,6 +578,7 @@ struct hl_va_range {
> * @mem_hash_lock: protects the mem_hash.
> * @mmu_lock: protects the MMU page tables. Any change to the PGT, modifing the
> * MMU hash or walking the PGT requires talking this lock
> + * @debugfs_list: node in debugfs list of contexts.
> * @cs_sequence: sequence number for CS. Value is assigned to a CS and passed
> * to user so user could inquire about CS. It is used as
> * index to cs_pending array.
> @@ -596,6 +603,7 @@ struct hl_ctx {
> struct hl_va_range dram_va_range;
> struct mutex mem_hash_lock;
> struct mutex mmu_lock;
> + struct list_head debugfs_list;
> u64 cs_sequence;
> spinlock_t cs_lock;
> atomic64_t dram_phys_mem;
> @@ -654,6 +662,7 @@ struct hl_userptr {
> * @fence: pointer to the fence object of this CS.
> * @work_tdr: delayed work node for TDR.
> * @mirror_node : node in device mirror list of command submissions.
> + * @debugfs_list: node in debugfs list of command submissions.
> * @sequence: the sequence number of this CS.
> * @submitted: true if CS was submitted to H/W.
> * @completed: true if CS was completed by device.
> @@ -671,6 +680,7 @@ struct hl_cs {
> struct dma_fence *fence;
> struct delayed_work work_tdr;
> struct list_head mirror_node;
> + struct list_head debugfs_list;
> u64 sequence;
> u8 submitted;
> u8 completed;
> @@ -689,6 +699,7 @@ struct hl_cs {
> * @finish_work: workqueue object to run when job is completed.
> * @userptr_list: linked-list of userptr mappings that belong to this job and
> * wait for completion.
> + * @debugfs_list: node in debugfs list of command submission jobs.
> * @id: the id of this job inside a CS.
> * @hw_queue_id: the id of the H/W queue this job is submitted to.
> * @user_cb_size: the actual size of the CB we got from the user.
> @@ -702,6 +713,7 @@ struct hl_cs_job {
> struct hl_cb *patched_cb;
> struct work_struct finish_work;
> struct list_head userptr_list;
> + struct list_head debugfs_list;
> u32 id;
> u32 hw_queue_id;
> u32 user_cb_size;
> @@ -832,6 +844,7 @@ struct hl_vm {
> * @ctx: current executing context.
> * @ctx_mgr: context manager to handle multiple context for this FD.
> * @cb_mgr: command buffer manager to handle multiple buffers for this FD.
> + * @debugfs_list: list of relevant ASIC debugfs.
> * @refcount: number of related contexts.
> * @restore_phase_mutex: lock for context switch and restore phase.
> */
> @@ -842,11 +855,90 @@ struct hl_fpriv {
> struct hl_ctx *ctx; /* TODO: remove for multiple ctx */
> struct hl_ctx_mgr ctx_mgr;
> struct hl_cb_mgr cb_mgr;
> + struct list_head debugfs_list;
> struct kref refcount;
> struct mutex restore_phase_mutex;
> };
>
>
> +/*
> + * DebugFS
> + */
> +
> +/**
> + * struct hl_info_list - debugfs file ops.
> + * @name: file name.
> + * @show: function to output information.
> + * @write: function to write to the file.
> + */
> +struct hl_info_list {
> + const char *name;
> + int (*show)(struct seq_file *s, void *data);
> + ssize_t (*write)(struct file *file, const char __user *buf,
> + size_t count, loff_t *f_pos);
> +};
> +
> +/**
> + * struct hl_debugfs_entry - debugfs dentry wrapper.
> + * @dent: base debugfs entry structure.
> + * @info_ent: dentry realted ops.
> + * @dev_entry: ASIC specific debugfs manager.
> + */
> +struct hl_debugfs_entry {
> + struct dentry *dent;
> + const struct hl_info_list *info_ent;
> + struct hl_dbg_device_entry *dev_entry;
> +};
> +
> +/**
> + * struct hl_dbg_device_entry - ASIC specific debugfs manager.
> + * @root: root dentry.
> + * @hdev: habanalabs device structure.
> + * @entry_arr: array of available hl_debugfs_entry.
> + * @file_list: list of available debugfs files.
> + * @file_mutex: protects file_list.
> + * @cb_list: list of available CBs.
> + * @cb_spinlock: protects cb_list.
> + * @cs_list: list of available CSs.
> + * @cs_spinlock: protects cs_list.
> + * @cs_job_list: list of available CB jobs.
> + * @cs_job_spinlock: protects cs_job_list.
> + * @userptr_list: list of available userptrs (virtual memory chunk descriptor).
> + * @userptr_spinlock: protects userptr_list.
> + * @ctx_mem_hash_list: list of available contexts with MMU mappings.
> + * @ctx_mem_hash_spinlock: protects cb_list.
> + * @addr: next address to read/write from/to in read/write32.
> + * @mmu_addr: next virtual address to translate to physical address in mmu_show.
> + * @mmu_asid: ASID to use while translating in mmu_show.
> + * @i2c_bus: generic u8 debugfs file for bus value to use in i2c_data_read.
> + * @i2c_bus: generic u8 debugfs file for address value to use in i2c_data_read.
> + * @i2c_bus: generic u8 debugfs file for register value to use in i2c_data_read.
> + */
> +struct hl_dbg_device_entry {
> + struct dentry *root;
> + struct hl_device *hdev;
> + struct hl_debugfs_entry *entry_arr;
> + struct list_head file_list;
> + struct mutex file_mutex;
> + struct list_head cb_list;
> + spinlock_t cb_spinlock;
> + struct list_head cs_list;
> + spinlock_t cs_spinlock;
> + struct list_head cs_job_list;
> + spinlock_t cs_job_spinlock;
> + struct list_head userptr_list;
> + spinlock_t userptr_spinlock;
> + struct list_head ctx_mem_hash_list;
> + spinlock_t ctx_mem_hash_spinlock;
> + u64 addr;
> + u64 mmu_addr;
> + u32 mmu_asid;
> + u8 i2c_bus;
> + u8 i2c_addr;
> + u8 i2c_reg;
> +};
> +
> +
> /*
> * DEVICES
> */
> @@ -939,6 +1031,7 @@ struct hl_device_reset_work {
> * @hwmon_dev: H/W monitor device.
> * @pm_mng_profile: current power management profile.
> * @hl_chip_info: ASIC's sensors information.
> + * @hl_debugfs: device's debugfs manager.
> * @cb_pool: list of preallocated CBs.
> * @cb_pool_lock: protects the CB pool.
> * @user_ctx: current user context executing.
> @@ -1004,6 +1097,8 @@ struct hl_device {
> enum hl_pm_mng_profile pm_mng_profile;
> struct hwmon_chip_info hl_chip_info;
>
> + struct hl_dbg_device_entry hl_debugfs;
> +
> struct list_head cb_pool;
> spinlock_t cb_pool_lock;
>
> @@ -1241,6 +1336,101 @@ void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
> u64 hl_get_max_power(struct hl_device *hdev);
> void hl_set_max_power(struct hl_device *hdev, u64 value);
>
> +#ifdef CONFIG_DEBUG_FS
> +
> +int hl_debugfs_init(void);
> +void hl_debugfs_fini(void);
> +void hl_debugfs_add_device(struct hl_device *hdev);
> +void hl_debugfs_remove_device(struct hl_device *hdev);
> +void hl_debugfs_add_file(struct hl_fpriv *hpriv);
> +void hl_debugfs_remove_file(struct hl_fpriv *hpriv);
> +void hl_debugfs_add_cb(struct hl_cb *cb);
> +void hl_debugfs_remove_cb(struct hl_cb *cb);
> +void hl_debugfs_add_cs(struct hl_cs *cs);
> +void hl_debugfs_remove_cs(struct hl_cs *cs);
> +void hl_debugfs_add_job(struct hl_device *hdev, struct hl_cs_job *job);
> +void hl_debugfs_remove_job(struct hl_device *hdev, struct hl_cs_job *job);
> +void hl_debugfs_add_userptr(struct hl_device *hdev, struct hl_userptr *userptr);
> +void hl_debugfs_remove_userptr(struct hl_device *hdev,
> + struct hl_userptr *userptr);
> +void hl_debugfs_add_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx);
> +void hl_debugfs_remove_ctx_mem_hash(struct hl_device *hdev, struct hl_ctx *ctx);
> +
> +#else
> +
> +static inline int __init hl_debugfs_init(void)
> +{
> + return 0;
> +}
> +
> +static inline void hl_debugfs_fini(void)
> +{
> +}
> +
> +static inline void hl_debugfs_add_device(struct hl_device *hdev)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_device(struct hl_device *hdev)
> +{
> +}
> +
> +static inline void hl_debugfs_add_file(struct hl_fpriv *hpriv)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_file(struct hl_fpriv *hpriv)
> +{
> +}
> +
> +static inline void hl_debugfs_add_cb(struct hl_cb *cb)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_cb(struct hl_cb *cb)
> +{
> +}
> +
> +static inline void hl_debugfs_add_cs(struct hl_cs *cs)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_cs(struct hl_cs *cs)
> +{
> +}
> +
> +static inline void hl_debugfs_add_job(struct hl_device *hdev,
> + struct hl_cs_job *job)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_job(struct hl_device *hdev,
> + struct hl_cs_job *job)
> +{
> +}
> +
> +static inline void hl_debugfs_add_userptr(struct hl_device *hdev,
> + struct hl_userptr *userptr)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_userptr(struct hl_device *hdev,
> + struct hl_userptr *userptr)
> +{
> +}
> +
> +static inline void hl_debugfs_add_ctx_mem_hash(struct hl_device *hdev,
> + struct hl_ctx *ctx)
> +{
> +}
> +
> +static inline void hl_debugfs_remove_ctx_mem_hash(struct hl_device *hdev,
> + struct hl_ctx *ctx)
> +{
> +}
> +
> +#endif
> +
> /* IOCTLs */
> long hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
> int hl_cb_ioctl(struct hl_fpriv *hpriv, void *data);
> diff --git a/drivers/misc/habanalabs/habanalabs_drv.c b/drivers/misc/habanalabs/habanalabs_drv.c
> index 658dc4588a36..96e0fc9c401f 100644
> --- a/drivers/misc/habanalabs/habanalabs_drv.c
> +++ b/drivers/misc/habanalabs/habanalabs_drv.c
> @@ -150,6 +150,8 @@ int hl_device_open(struct inode *inode, struct file *filp)
> */
> hl_device_set_frequency(hdev, PLL_HIGH);
>
> + hl_debugfs_add_file(hpriv);
> +
> return 0;
>
> out_err:
> @@ -417,17 +419,20 @@ static int __init hl_init(void)
> goto remove_major;
> }
>
> + hl_debugfs_init();
> +
> rc = pci_register_driver(&hl_pci_driver);
> if (rc) {
> pr_err("failed to register pci device\n");
> - goto remove_class;
> + goto remove_debugfs;
> }
>
> pr_debug("driver loaded\n");
>
> return 0;
>
> -remove_class:
> +remove_debugfs:
> + hl_debugfs_fini();
> class_destroy(hl_class);
> remove_major:
> unregister_chrdev_region(MKDEV(hl_major, 0), HL_MAX_MINORS);
> @@ -441,6 +446,13 @@ static void __exit hl_exit(void)
> {
> pci_unregister_driver(&hl_pci_driver);
>
> + /*
> + * Removing debugfs must be after all devices or simulator devices
> + * have been removed because otherwise we get a bug in the
> + * debugfs module for referencing NULL objects
> + */
> + hl_debugfs_fini();
> +
> class_destroy(hl_class);
> unregister_chrdev_region(MKDEV(hl_major, 0), HL_MAX_MINORS);
>
> diff --git a/drivers/misc/habanalabs/memory.c b/drivers/misc/habanalabs/memory.c
> index cf0be4f254e0..35f2339310d3 100644
> --- a/drivers/misc/habanalabs/memory.c
> +++ b/drivers/misc/habanalabs/memory.c
> @@ -1289,6 +1289,8 @@ int hl_pin_host_memory(struct hl_device *hdev, u64 addr, u32 size,
> goto free_sgt;
> }
>
> + hl_debugfs_add_userptr(hdev, userptr);
> +
> return 0;
>
> free_sgt:
> @@ -1314,6 +1316,8 @@ int hl_unpin_host_memory(struct hl_device *hdev, struct hl_userptr *userptr)
> {
> struct page **pages;
>
> + hl_debugfs_remove_userptr(hdev, userptr);
> +
> if (userptr->dma_mapped)
> hdev->asic_funcs->hl_dma_unmap_sg(hdev,
> userptr->sgt->sgl,
> @@ -1475,6 +1479,8 @@ int hl_vm_ctx_init_with_ranges(struct hl_ctx *ctx, u64 host_range_start,
> goto dram_vm_err;
> }
>
> + hl_debugfs_add_ctx_mem_hash(hdev, ctx);
> +
> return 0;
>
> dram_vm_err:
> @@ -1597,6 +1603,8 @@ void hl_vm_ctx_fini(struct hl_ctx *ctx)
> struct hlist_node *tmp_node;
> int i;
>
> + hl_debugfs_remove_ctx_mem_hash(hdev, ctx);
> +
> if (!hash_empty(ctx->mem_hash))
> dev_notice(hdev->dev, "ctx is freed while it has va in use\n");
>
> --
> 2.17.1
>

--
Sincerely yours,
Mike.

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