#include <drm/panthor_drm.h>
#include "panthor_device.h"
+#include "panthor_fw.h"
#include "panthor_gem.h"
#include "panthor_mmu.h"
+#ifdef CONFIG_DEBUG_FS
+static void panthor_gem_debugfs_bo_add(struct panthor_device *ptdev,
+ struct panthor_gem_object *bo)
+{
+ INIT_LIST_HEAD(&bo->debugfs.node);
+
+ bo->debugfs.creator.tgid = current->group_leader->pid;
+ get_task_comm(bo->debugfs.creator.process_name, current->group_leader);
+
+ mutex_lock(&ptdev->gems.lock);
+ list_add_tail(&bo->debugfs.node, &ptdev->gems.node);
+ mutex_unlock(&ptdev->gems.lock);
+}
+
+static void panthor_gem_debugfs_bo_rm(struct panthor_gem_object *bo)
+{
+ struct panthor_device *ptdev = container_of(bo->base.base.dev,
+ struct panthor_device, base);
+
+ if (list_empty(&bo->debugfs.node))
+ return;
+
+ mutex_lock(&ptdev->gems.lock);
+ list_del_init(&bo->debugfs.node);
+ mutex_unlock(&ptdev->gems.lock);
+}
+
+#else
+static void panthor_gem_debugfs_bo_add(struct panthor_device *ptdev,
+ struct panthor_gem_object *bo)
+{}
+static void panthor_gem_debugfs_bo_rm(struct panthor_gem_object *bo) {}
+#endif
+
static void panthor_gem_free_object(struct drm_gem_object *obj)
{
struct panthor_gem_object *bo = to_panthor_bo(obj);
struct drm_gem_object *vm_root_gem = bo->exclusive_vm_root_gem;
+ panthor_gem_debugfs_bo_rm(bo);
+
/*
* Label might have been allocated with kstrdup_const(),
* we need to take that into account when freeing the memory
struct drm_gem_shmem_object *obj;
struct panthor_kernel_bo *kbo;
struct panthor_gem_object *bo;
+ u32 debug_flags = PANTHOR_DEBUGFS_GEM_USAGE_FLAG_KERNEL;
int ret;
if (drm_WARN_ON(&ptdev->base, !vm))
kbo->obj = &obj->base;
bo->flags = bo_flags;
+ if (vm == panthor_fw_vm(ptdev))
+ debug_flags |= PANTHOR_DEBUGFS_GEM_USAGE_FLAG_FW_MAPPED;
+
panthor_gem_kernel_bo_set_label(kbo, name);
+ panthor_gem_debugfs_set_usage_flags(to_panthor_bo(kbo->obj), debug_flags);
/* The system and GPU MMU page size might differ, which becomes a
* problem for FW sections that need to be mapped at explicit address
drm_gem_gpuva_set_lock(&obj->base.base, &obj->gpuva_list_lock);
mutex_init(&obj->label.lock);
+ panthor_gem_debugfs_bo_add(ptdev, obj);
+
return &obj->base.base;
}
/* drop reference from allocate - handle holds it now. */
drm_gem_object_put(&shmem->base);
+ /*
+ * No explicit flags are needed in the call below, since the
+ * function internally sets the INITIALIZED bit for us.
+ */
+ panthor_gem_debugfs_set_usage_flags(bo, 0);
+
return ret;
}
panthor_gem_bo_set_label(bo->obj, str);
}
+
+#ifdef CONFIG_DEBUG_FS
+struct gem_size_totals {
+ size_t size;
+ size_t resident;
+ size_t reclaimable;
+};
+
+static void panthor_gem_debugfs_print_flag_names(struct seq_file *m)
+{
+ int len;
+ int i;
+
+ static const char * const gem_state_flags_names[] = {
+ [PANTHOR_DEBUGFS_GEM_STATE_IMPORTED_BIT] = "imported",
+ [PANTHOR_DEBUGFS_GEM_STATE_EXPORTED_BIT] = "exported",
+ };
+
+ static const char * const gem_usage_flags_names[] = {
+ [PANTHOR_DEBUGFS_GEM_USAGE_KERNEL_BIT] = "kernel",
+ [PANTHOR_DEBUGFS_GEM_USAGE_FW_MAPPED_BIT] = "fw-mapped",
+ };
+
+ seq_puts(m, "GEM state flags: ");
+ for (i = 0, len = ARRAY_SIZE(gem_state_flags_names); i < len; i++) {
+ if (!gem_state_flags_names[i])
+ continue;
+ seq_printf(m, "%s (0x%x)%s", gem_state_flags_names[i],
+ (u32)BIT(i), (i < len - 1) ? ", " : "\n");
+ }
+
+ seq_puts(m, "GEM usage flags: ");
+ for (i = 0, len = ARRAY_SIZE(gem_usage_flags_names); i < len; i++) {
+ if (!gem_usage_flags_names[i])
+ continue;
+ seq_printf(m, "%s (0x%x)%s", gem_usage_flags_names[i],
+ (u32)BIT(i), (i < len - 1) ? ", " : "\n\n");
+ }
+}
+
+static void panthor_gem_debugfs_bo_print(struct panthor_gem_object *bo,
+ struct seq_file *m,
+ struct gem_size_totals *totals)
+{
+ unsigned int refcount = kref_read(&bo->base.base.refcount);
+ char creator_info[32] = {};
+ size_t resident_size;
+ u32 gem_usage_flags = bo->debugfs.flags & (u32)~PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED;
+ u32 gem_state_flags = 0;
+
+ /* Skip BOs being destroyed. */
+ if (!refcount)
+ return;
+
+ resident_size = bo->base.pages ? bo->base.base.size : 0;
+
+ snprintf(creator_info, sizeof(creator_info),
+ "%s/%d", bo->debugfs.creator.process_name, bo->debugfs.creator.tgid);
+ seq_printf(m, "%-32s%-16d%-16d%-16zd%-16zd0x%-16lx",
+ creator_info,
+ bo->base.base.name,
+ refcount,
+ bo->base.base.size,
+ resident_size,
+ drm_vma_node_start(&bo->base.base.vma_node));
+
+ if (bo->base.base.import_attach)
+ gem_state_flags |= PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED;
+ if (bo->base.base.dma_buf)
+ gem_state_flags |= PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED;
+
+ seq_printf(m, "0x%-8x 0x%-10x", gem_state_flags, gem_usage_flags);
+
+ scoped_guard(mutex, &bo->label.lock) {
+ seq_printf(m, "%s\n", bo->label.str ? : "");
+ }
+
+ totals->size += bo->base.base.size;
+ totals->resident += resident_size;
+ if (bo->base.madv > 0)
+ totals->reclaimable += resident_size;
+}
+
+void panthor_gem_debugfs_print_bos(struct panthor_device *ptdev,
+ struct seq_file *m)
+{
+ struct gem_size_totals totals = {0};
+ struct panthor_gem_object *bo;
+
+ panthor_gem_debugfs_print_flag_names(m);
+
+ seq_puts(m, "created-by global-name refcount size resident-size file-offset state usage label\n");
+ seq_puts(m, "----------------------------------------------------------------------------------------------------------------------------------------------\n");
+
+ scoped_guard(mutex, &ptdev->gems.lock) {
+ list_for_each_entry(bo, &ptdev->gems.node, debugfs.node) {
+ if (bo->debugfs.flags & PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED)
+ panthor_gem_debugfs_bo_print(bo, m, &totals);
+ }
+ }
+
+ seq_puts(m, "==============================================================================================================================================\n");
+ seq_printf(m, "Total size: %zd, Total resident: %zd, Total reclaimable: %zd\n",
+ totals.size, totals.resident, totals.reclaimable);
+}
+#endif
#define PANTHOR_BO_LABEL_MAXLEN 4096
+enum panthor_debugfs_gem_state_flags {
+ PANTHOR_DEBUGFS_GEM_STATE_IMPORTED_BIT = 0,
+ PANTHOR_DEBUGFS_GEM_STATE_EXPORTED_BIT = 1,
+
+ /** @PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED: GEM BO is PRIME imported. */
+ PANTHOR_DEBUGFS_GEM_STATE_FLAG_IMPORTED = BIT(PANTHOR_DEBUGFS_GEM_STATE_IMPORTED_BIT),
+
+ /** @PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED: GEM BO is PRIME exported. */
+ PANTHOR_DEBUGFS_GEM_STATE_FLAG_EXPORTED = BIT(PANTHOR_DEBUGFS_GEM_STATE_EXPORTED_BIT),
+};
+
+enum panthor_debugfs_gem_usage_flags {
+ PANTHOR_DEBUGFS_GEM_USAGE_KERNEL_BIT = 0,
+ PANTHOR_DEBUGFS_GEM_USAGE_FW_MAPPED_BIT = 1,
+
+ /** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_KERNEL: BO is for kernel use only. */
+ PANTHOR_DEBUGFS_GEM_USAGE_FLAG_KERNEL = BIT(PANTHOR_DEBUGFS_GEM_USAGE_KERNEL_BIT),
+
+ /** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_FW_MAPPED: BO is mapped on the FW VM. */
+ PANTHOR_DEBUGFS_GEM_USAGE_FLAG_FW_MAPPED = BIT(PANTHOR_DEBUGFS_GEM_USAGE_FW_MAPPED_BIT),
+
+ /** @PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED: BO is ready for DebugFS display. */
+ PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED = BIT(31),
+};
+
+/**
+ * struct panthor_gem_debugfs - GEM object's DebugFS list information
+ */
+struct panthor_gem_debugfs {
+ /**
+ * @node: Node used to insert the object in the device-wide list of
+ * GEM objects, to display information about it through a DebugFS file.
+ */
+ struct list_head node;
+
+ /** @creator: Information about the UM process which created the GEM. */
+ struct {
+ /** @creator.process_name: Group leader name in owning thread's process */
+ char process_name[TASK_COMM_LEN];
+
+ /** @creator.tgid: PID of the thread's group leader within its process */
+ pid_t tgid;
+ } creator;
+
+ /** @flags: Combination of panthor_debugfs_gem_usage_flags flags */
+ u32 flags;
+};
+
/**
* struct panthor_gem_object - Driver specific GEM object.
*/
/** @lock.str: Protects access to the @label.str field. */
struct mutex lock;
} label;
+
+#ifdef CONFIG_DEBUG_FS
+ struct panthor_gem_debugfs debugfs;
+#endif
};
/**
void panthor_kernel_bo_destroy(struct panthor_kernel_bo *bo);
+#ifdef CONFIG_DEBUG_FS
+void panthor_gem_debugfs_print_bos(struct panthor_device *pfdev,
+ struct seq_file *m);
+static inline void
+panthor_gem_debugfs_set_usage_flags(struct panthor_gem_object *bo, u32 usage_flags)
+{
+ bo->debugfs.flags = usage_flags | PANTHOR_DEBUGFS_GEM_USAGE_FLAG_INITIALIZED;
+}
+
+#else
+void panthor_gem_debugfs_set_usage_flags(struct panthor_gem_object *bo, u32 usage_flags) {};
+#endif
+
#endif /* __PANTHOR_GEM_H__ */
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