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Subject[PATCH 3/4] habanalabs: state dump monitors and fences infrastructure
Date
From: Yuri Nudelman <ynudelman@habana.ai>

With the infrastructure in place, monitors and fences dump shall be
implemented.

Signed-off-by: Yuri Nudelman <ynudelman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
---
drivers/misc/habanalabs/common/habanalabs.h | 33 +++
drivers/misc/habanalabs/common/state_dump.c | 311 ++++++++++++++++++--
drivers/misc/habanalabs/gaudi/gaudi.c | 27 ++
drivers/misc/habanalabs/goya/goya.c | 27 ++
4 files changed, 375 insertions(+), 23 deletions(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index c1bb175d004b..3657d24ca467 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -1880,6 +1880,24 @@ enum hl_sync_engine_type {
ENGINE_MME,
};

+/**
+ * struct hl_mon_state_dump - represents a state dump of a single monitor
+ * @id: monitor id
+ * @wr_addr_low: address monitor will write to, low bits
+ * @wr_addr_high: address monitor will write to, high bits
+ * @wr_data: data monitor will write
+ * @arm_data: register value containing monitor configuration
+ * @status: monitor status
+ */
+struct hl_mon_state_dump {
+ u32 id;
+ u32 wr_addr_low;
+ u32 wr_addr_high;
+ u32 wr_data;
+ u32 arm_data;
+ u32 status;
+};
+
/**
* struct hl_sync_to_engine_map_entry - sync object id to engine mapping entry
* @engine_type: type of the engine
@@ -1905,10 +1923,23 @@ struct hl_sync_to_engine_map {
/**
* struct hl_state_dump_specs_funcs - virtual functions used by the state dump
* @gen_sync_to_engine_map: generate a hash map from sync obj id to its engine
+ * @print_single_monitor: format monitor data as string
+ * @monitor_valid: return true if given monitor dump is valid
+ * @print_fences_single_engine: format fences data as string
*/
struct hl_state_dump_specs_funcs {
int (*gen_sync_to_engine_map)(struct hl_device *hdev,
struct hl_sync_to_engine_map *map);
+ int (*print_single_monitor)(char **buf, size_t *size, size_t *offset,
+ struct hl_device *hdev,
+ struct hl_mon_state_dump *mon);
+ int (*monitor_valid)(struct hl_mon_state_dump *mon);
+ int (*print_fences_single_engine)(struct hl_device *hdev,
+ u64 base_offset,
+ u64 status_base_offset,
+ enum hl_sync_engine_type engine_type,
+ u32 engine_id, char **buf,
+ size_t *size, size_t *offset);
};

/**
@@ -2795,6 +2826,8 @@ int hl_cs_signal_sob_wraparound_handler(struct hl_device *hdev, u32 q_idx,

int hl_state_dump(struct hl_device *hdev);
const char *hl_state_dump_get_sync_name(struct hl_device *hdev, u32 sync_id);
+const char *hl_state_dump_get_monitor_name(struct hl_device *hdev,
+ struct hl_mon_state_dump *mon);
void hl_state_dump_free_sync_to_engine_map(struct hl_sync_to_engine_map *map);
__printf(4, 5) int hl_snprintf_resize(char **buf, size_t *size, size_t *offset,
const char *format, ...);
diff --git a/drivers/misc/habanalabs/common/state_dump.c b/drivers/misc/habanalabs/common/state_dump.c
index 6a142a6acdfa..34ffab4f9cbc 100644
--- a/drivers/misc/habanalabs/common/state_dump.c
+++ b/drivers/misc/habanalabs/common/state_dump.c
@@ -5,6 +5,7 @@
* All Rights Reserved.
*/

+#include <linux/vmalloc.h>
#include <uapi/misc/habanalabs.h>
#include "habanalabs.h"

@@ -72,8 +73,7 @@ static int resize_to_fit(char **buf, size_t *size, size_t desired_size)
return 0;

/* Not enough space to print all, have to resize */
- new_size =
- max(PAGE_SIZE, round_up(desired_size, PAGE_SIZE));
+ new_size = max(PAGE_SIZE, round_up(desired_size, PAGE_SIZE));
resized_buf = vmalloc(new_size);
if (!resized_buf)
return -ENOMEM;
@@ -192,6 +192,30 @@ const char *hl_state_dump_get_sync_name(struct hl_device *hdev, u32 sync_id)
return NULL;
}

+/**
+ * hl_state_dump_get_monitor_name - transform monitor object dump to monitor
+ * name if available
+ * @hdev: pointer to the device
+ * @mon: monitor state dump
+ *
+ * Returns a name literal or NULL if not resolved.
+ * Note: returning NULL shall not be considered as a failure, as not all
+ * monitors are named.
+ */
+const char *hl_state_dump_get_monitor_name(struct hl_device *hdev,
+ struct hl_mon_state_dump *mon)
+{
+ struct hl_state_dump_specs *sds = &hdev->state_dump_specs;
+ struct hl_hw_obj_name_entry *entry;
+
+ hash_for_each_possible(sds->monitor_id_to_str_tb,
+ entry, node, mon->id)
+ if (mon->id == entry->id)
+ return entry->name;
+
+ return NULL;
+}
+
/**
* hl_state_dump_free_sync_to_engine_map - free sync object to engine map
* @map: sync object to engine map
@@ -245,23 +269,15 @@ static u32 *hl_state_dump_read_sync_objects(struct hl_device *hdev, u32 index)
s64 base_addr; /* Base addr can be negative */
int i;

- base_addr =
- sds->props[SP_SYNC_OBJ_BASE_ADDR] +
- sds->props[SP_NEXT_SYNC_OBJ_ADDR] *
- index;
+ base_addr = sds->props[SP_SYNC_OBJ_BASE_ADDR] +
+ sds->props[SP_NEXT_SYNC_OBJ_ADDR] * index;

- sync_objects = vmalloc(
- sds->props[SP_SYNC_OBJ_AMOUNT] *
- sizeof(u32));
+ sync_objects = vmalloc(sds->props[SP_SYNC_OBJ_AMOUNT] * sizeof(u32));
if (!sync_objects)
return NULL;

- for (i = 0;
- i < sds->props[SP_SYNC_OBJ_AMOUNT];
- ++i) {
- sync_objects[i] =
- RREG32(base_addr + i * sizeof(u32));
- }
+ for (i = 0; i < sds->props[SP_SYNC_OBJ_AMOUNT]; ++i)
+ sync_objects[i] = RREG32(base_addr + i * sizeof(u32));

return sync_objects;
}
@@ -313,19 +329,16 @@ hl_state_dump_print_syncs_single_block(struct hl_device *hdev, u32 index,
goto out;
}

- for (i = 0;
- i < sds->props[SP_SYNC_OBJ_AMOUNT];
- ++i) {
+ for (i = 0; i < sds->props[SP_SYNC_OBJ_AMOUNT]; ++i) {
struct hl_sync_to_engine_map_entry *entry;
u64 sync_object_addr;

if (!sync_objects[i])
continue;

- sync_object_addr =
- sds->props[SP_SYNC_OBJ_BASE_ADDR] +
- sds->props[SP_NEXT_SYNC_OBJ_ADDR] *
- index + i * sizeof(u32);
+ sync_object_addr = sds->props[SP_SYNC_OBJ_BASE_ADDR] +
+ sds->props[SP_NEXT_SYNC_OBJ_ADDR] * index +
+ i * sizeof(u32);

rc = hl_snprintf_resize(buf, size, offset, "sync id: %u", i);
if (rc)
@@ -346,7 +359,8 @@ hl_state_dump_print_syncs_single_block(struct hl_device *hdev, u32 index,
entry = hl_state_dump_get_sync_to_engine(map,
(u32)sync_object_addr);
if (entry) {
- rc = hl_snprintf_resize(buf, size, offset, ", Engine: ");
+ rc = hl_snprintf_resize(buf, size, offset,
+ ", Engine: ");
if (rc)
goto free_sync_objects;
rc = hl_print_resize_sync_engine(buf, size, offset,
@@ -422,6 +436,245 @@ static int hl_state_dump_print_syncs(struct hl_device *hdev,
return rc;
}

+/**
+ * hl_state_dump_alloc_read_sm_block_monitors - read monitors for a specific
+ * block
+ * @hdev: pointer to the device
+ * @index: sync manager block index starting with E_N
+ *
+ * Returns an array of monitor data of size SP_MONITORS_AMOUNT or NULL
+ * on error
+ */
+static struct hl_mon_state_dump *
+hl_state_dump_alloc_read_sm_block_monitors(struct hl_device *hdev, u32 index)
+{
+ struct hl_state_dump_specs *sds = &hdev->state_dump_specs;
+ struct hl_mon_state_dump *monitors;
+ s64 base_addr; /* Base addr can be negative */
+ int i;
+
+ monitors = vmalloc(sds->props[SP_MONITORS_AMOUNT] *
+ sizeof(struct hl_mon_state_dump));
+ if (!monitors)
+ return NULL;
+
+ base_addr = sds->props[SP_NEXT_SYNC_OBJ_ADDR] * index;
+
+ for (i = 0; i < sds->props[SP_MONITORS_AMOUNT]; ++i) {
+ monitors[i].id = i;
+ monitors[i].wr_addr_low =
+ RREG32(base_addr + sds->props[SP_MON_OBJ_WR_ADDR_LOW] +
+ i * sizeof(u32));
+
+ monitors[i].wr_addr_high =
+ RREG32(base_addr + sds->props[SP_MON_OBJ_WR_ADDR_HIGH] +
+ i * sizeof(u32));
+
+ monitors[i].wr_data =
+ RREG32(base_addr + sds->props[SP_MON_OBJ_WR_DATA] +
+ i * sizeof(u32));
+
+ monitors[i].arm_data =
+ RREG32(base_addr + sds->props[SP_MON_OBJ_ARM_DATA] +
+ i * sizeof(u32));
+
+ monitors[i].status =
+ RREG32(base_addr + sds->props[SP_MON_OBJ_STATUS] +
+ i * sizeof(u32));
+ }
+
+ return monitors;
+}
+
+/**
+ * hl_state_dump_print_monitors_single_block - print active monitors
+ * @monitors: monitors array created with
+ * hl_state_dump_alloc_read_sm_block_monitors
+ */
+static void hl_state_dump_free_monitors(struct hl_mon_state_dump *monitors)
+{
+ vfree(monitors);
+}
+
+/**
+ * hl_state_dump_print_monitors_single_block - print active monitors on a
+ * single block
+ * @hdev: pointer to the device
+ * @index: sync manager block index starting with E_N
+ * @buf: destination buffer double pointer to be used with hl_snprintf_resize
+ * @size: pointer to the size container
+ * @offset: pointer to the offset container
+ *
+ * Returns 0 on success or error code on failure
+ */
+static int hl_state_dump_print_monitors_single_block(struct hl_device *hdev,
+ u32 index,
+ char **buf, size_t *size,
+ size_t *offset)
+{
+ struct hl_state_dump_specs *sds = &hdev->state_dump_specs;
+ struct hl_mon_state_dump *monitors = NULL;
+ int rc = 0, i;
+
+ if (sds->sync_namager_names) {
+ rc = hl_snprintf_resize(
+ buf, size, offset, "%s\n",
+ sds->sync_namager_names[index]);
+ if (rc)
+ goto out;
+ }
+
+ monitors = hl_state_dump_alloc_read_sm_block_monitors(hdev, index);
+ if (!monitors) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < sds->props[SP_MONITORS_AMOUNT]; ++i) {
+ if (!(sds->funcs.monitor_valid(&monitors[i])))
+ continue;
+
+ /* Monitor is valid, dump it */
+ rc = sds->funcs.print_single_monitor(buf, size, offset, hdev,
+ &monitors[i]);
+ if (rc)
+ goto free_monitors;
+
+ hl_snprintf_resize(buf, size, offset, "\n");
+ }
+
+free_monitors:
+ hl_state_dump_free_monitors(monitors);
+out:
+ return rc;
+}
+
+/**
+ * hl_state_dump_print_monitors - print active monitors
+ * @hdev: pointer to the device
+ * @buf: destination buffer double pointer to be used with hl_snprintf_resize
+ * @size: pointer to the size container
+ * @offset: pointer to the offset container
+ *
+ * Returns 0 on success or error code on failure
+ */
+static int hl_state_dump_print_monitors(struct hl_device *hdev,
+ char **buf, size_t *size,
+ size_t *offset)
+{
+ struct hl_state_dump_specs *sds = &hdev->state_dump_specs;
+ u32 index;
+ int rc = 0;
+
+ rc = hl_snprintf_resize(buf, size, offset,
+ "Valid (armed) monitor objects:\n");
+ if (rc)
+ goto out;
+
+ if (sds->sync_namager_names) {
+ for (index = 0; sds->sync_namager_names[index]; ++index) {
+ rc = hl_state_dump_print_monitors_single_block(
+ hdev, index, buf, size, offset);
+ if (rc)
+ goto out;
+ }
+ } else {
+ for (index = 0; index < sds->props[SP_NUM_CORES]; ++index) {
+ rc = hl_state_dump_print_monitors_single_block(
+ hdev, index, buf, size, offset);
+ if (rc)
+ goto out;
+ }
+ }
+
+out:
+ return rc;
+}
+
+/**
+ * hl_state_dump_print_engine_fences - print active fences for a specific
+ * engine
+ * @hdev: pointer to the device
+ * @engine_type: engine type to use
+ * @buf: destination buffer double pointer to be used with hl_snprintf_resize
+ * @size: pointer to the size container
+ * @offset: pointer to the offset container
+ */
+static int
+hl_state_dump_print_engine_fences(struct hl_device *hdev,
+ enum hl_sync_engine_type engine_type,
+ char **buf, size_t *size, size_t *offset)
+{
+ struct hl_state_dump_specs *sds = &hdev->state_dump_specs;
+ int rc = 0, i, n_fences;
+ u64 base_addr, next_fence;
+
+ switch (engine_type) {
+ case ENGINE_TPC:
+ n_fences = sds->props[SP_NUM_OF_TPC_ENGINES];
+ base_addr = sds->props[SP_TPC0_CMDQ];
+ next_fence = sds->props[SP_NEXT_TPC];
+ break;
+ case ENGINE_MME:
+ n_fences = sds->props[SP_NUM_OF_MME_ENGINES];
+ base_addr = sds->props[SP_MME_CMDQ];
+ next_fence = sds->props[SP_NEXT_MME];
+ break;
+ case ENGINE_DMA:
+ n_fences = sds->props[SP_NUM_OF_DMA_ENGINES];
+ base_addr = sds->props[SP_DMA_CMDQ];
+ next_fence = sds->props[SP_DMA_QUEUES_OFFSET];
+ break;
+ default:
+ return -EINVAL;
+ }
+ for (i = 0; i < n_fences; ++i) {
+ rc = sds->funcs.print_fences_single_engine(
+ hdev,
+ base_addr + next_fence * i +
+ sds->props[SP_FENCE0_CNT_OFFSET],
+ base_addr + next_fence * i +
+ sds->props[SP_CP_STS_OFFSET],
+ engine_type, i, buf, size, offset);
+ if (rc)
+ goto out;
+ }
+out:
+ return rc;
+}
+
+/**
+ * hl_state_dump_print_fences - print active fences
+ * @hdev: pointer to the device
+ * @buf: destination buffer double pointer to be used with hl_snprintf_resize
+ * @size: pointer to the size container
+ * @offset: pointer to the offset container
+ */
+static int hl_state_dump_print_fences(struct hl_device *hdev, char **buf,
+ size_t *size, size_t *offset)
+{
+ int rc = 0;
+
+ rc = hl_snprintf_resize(buf, size, offset, "Valid (armed) fences:\n");
+ if (rc)
+ goto out;
+
+ rc = hl_state_dump_print_engine_fences(hdev, ENGINE_TPC, buf, size, offset);
+ if (rc)
+ goto out;
+
+ rc = hl_state_dump_print_engine_fences(hdev, ENGINE_MME, buf, size, offset);
+ if (rc)
+ goto out;
+
+ rc = hl_state_dump_print_engine_fences(hdev, ENGINE_DMA, buf, size, offset);
+ if (rc)
+ goto out;
+
+out:
+ return rc;
+}
+
/**
* hl_state_dump() - dump system state
* @hdev: pointer to device structure
@@ -442,6 +695,18 @@ int hl_state_dump(struct hl_device *hdev)

hl_snprintf_resize(&buf, &size, &offset, "\n");

+ rc = hl_state_dump_print_monitors(hdev, &buf, &size, &offset);
+ if (rc)
+ goto err;
+
+ hl_snprintf_resize(&buf, &size, &offset, "\n");
+
+ rc = hl_state_dump_print_fences(hdev, &buf, &size, &offset);
+ if (rc)
+ goto err;
+
+ hl_snprintf_resize(&buf, &size, &offset, "\n");
+
hl_debugfs_set_state_dump(hdev, buf, size);

return 0;
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 7f90f637d7f4..29ada339b66a 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -8986,9 +8986,36 @@ static int gaudi_gen_sync_to_engine_map(struct hl_device *hdev,
return 0;
}

+static int gaudi_monitor_valid(struct hl_mon_state_dump *mon)
+{
+ /* Not implemented */
+ return 0;
+}
+
+static int gaudi_print_single_monitor(char **buf, size_t *size, size_t *offset,
+ struct hl_device *hdev,
+ struct hl_mon_state_dump *mon)
+{
+ /* Not implemented */
+ return 0;
+}
+
+
+static int gaudi_print_fences_single_engine(
+ struct hl_device *hdev, u64 base_offset, u64 status_base_offset,
+ enum hl_sync_engine_type engine_type, u32 engine_id, char **buf,
+ size_t *size, size_t *offset)
+{
+ /* Not implemented */
+ return 0;
+}
+

static struct hl_state_dump_specs_funcs gaudi_state_dump_funcs = {
+ .monitor_valid = gaudi_monitor_valid,
+ .print_single_monitor = gaudi_print_single_monitor,
.gen_sync_to_engine_map = gaudi_gen_sync_to_engine_map,
+ .print_fences_single_engine = gaudi_print_fences_single_engine,
};

static void gaudi_state_dump_init(struct hl_device *hdev)
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 2c3d642d31ab..4144a8445eef 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -5533,9 +5533,36 @@ static int goya_gen_sync_to_engine_map(struct hl_device *hdev,
return 0;
}

+static int goya_monitor_valid(struct hl_mon_state_dump *mon)
+{
+ /* Not implemented */
+ return 0;
+}
+
+static int goya_print_single_monitor(char **buf, size_t *size, size_t *offset,
+ struct hl_device *hdev,
+ struct hl_mon_state_dump *mon)
+{
+ /* Not implemented */
+ return 0;
+}
+
+
+static int goya_print_fences_single_engine(
+ struct hl_device *hdev, u64 base_offset, u64 status_base_offset,
+ enum hl_sync_engine_type engine_type, u32 engine_id, char **buf,
+ size_t *size, size_t *offset)
+{
+ /* Not implemented */
+ return 0;
+}
+

static struct hl_state_dump_specs_funcs goya_state_dump_funcs = {
+ .monitor_valid = goya_monitor_valid,
+ .print_single_monitor = goya_print_single_monitor,
.gen_sync_to_engine_map = goya_gen_sync_to_engine_map,
+ .print_fences_single_engine = goya_print_fences_single_engine,
};

static void goya_state_dump_init(struct hl_device *hdev)
--
2.25.1
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