diff options
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_gem.c')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gem.c | 188 |
1 files changed, 187 insertions, 1 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c index 8e0ff3efede7..bb73f2a68a12 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gem.c +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */ +#include <linux/cleanup.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/dma-buf.h> @@ -11,6 +12,36 @@ #include "panfrost_gem.h" #include "panfrost_mmu.h" +#ifdef CONFIG_DEBUG_FS +static void panfrost_gem_debugfs_bo_add(struct panfrost_device *pfdev, + struct panfrost_gem_object *bo) +{ + bo->debugfs.creator.tgid = current->group_leader->pid; + get_task_comm(bo->debugfs.creator.process_name, current->group_leader); + + mutex_lock(&pfdev->debugfs.gems_lock); + list_add_tail(&bo->debugfs.node, &pfdev->debugfs.gems_list); + mutex_unlock(&pfdev->debugfs.gems_lock); +} + +static void panfrost_gem_debugfs_bo_rm(struct panfrost_gem_object *bo) +{ + struct panfrost_device *pfdev = bo->base.base.dev->dev_private; + + if (list_empty(&bo->debugfs.node)) + return; + + mutex_lock(&pfdev->debugfs.gems_lock); + list_del_init(&bo->debugfs.node); + mutex_unlock(&pfdev->debugfs.gems_lock); +} +#else +static void panfrost_gem_debugfs_bo_add(struct panfrost_device *pfdev, + struct panfrost_gem_object *bo) +{} +static void panfrost_gem_debugfs_bo_rm(struct panfrost_gem_object *bo) {} +#endif + /* Called DRM core on the last userspace/kernel unreference of the * BO. */ @@ -35,6 +66,10 @@ static void panfrost_gem_free_object(struct drm_gem_object *obj) */ WARN_ON_ONCE(!list_empty(&bo->mappings.list)); + kfree_const(bo->label.str); + panfrost_gem_debugfs_bo_rm(bo); + mutex_destroy(&bo->label.lock); + if (bo->sgts) { int i; int n_sgt = bo->base.base.size / SZ_2M; @@ -200,7 +235,7 @@ static enum drm_gem_object_status panfrost_gem_status(struct drm_gem_object *obj struct panfrost_gem_object *bo = to_panfrost_bo(obj); enum drm_gem_object_status res = 0; - if (bo->base.base.import_attach || bo->base.pages) + if (drm_gem_is_imported(&bo->base.base) || bo->base.pages) res |= DRM_GEM_OBJECT_RESIDENT; if (bo->base.madv == PANFROST_MADV_DONTNEED) @@ -260,6 +295,9 @@ struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, size_t mutex_init(&obj->mappings.lock); obj->base.base.funcs = &panfrost_gem_funcs; obj->base.map_wc = !pfdev->coherent; + mutex_init(&obj->label.lock); + + panfrost_gem_debugfs_bo_add(pfdev, obj); return &obj->base.base; } @@ -300,5 +338,153 @@ panfrost_gem_prime_import_sg_table(struct drm_device *dev, bo = to_panfrost_bo(obj); bo->noexec = true; + /* + * We assign this generic label because this function cannot + * be reached through any of the Panfrost UM driver-specific + * code paths, unless one is given by explicitly calling the + * SET_LABEL_BO ioctl. It is therefore preferable to have a + * blanket BO tag that tells us the object was imported from + * another driver than nothing at all. + */ + panfrost_gem_internal_set_label(obj, "GEM PRIME buffer"); + return obj; } + +void +panfrost_gem_set_label(struct drm_gem_object *obj, const char *label) +{ + struct panfrost_gem_object *bo = to_panfrost_bo(obj); + const char *old_label; + + scoped_guard(mutex, &bo->label.lock) { + old_label = bo->label.str; + bo->label.str = label; + } + + kfree_const(old_label); +} + +void +panfrost_gem_internal_set_label(struct drm_gem_object *obj, const char *label) +{ + struct panfrost_gem_object *bo = to_panfrost_bo(obj); + const char *str; + + /* We should never attempt labelling a UM-exposed GEM object */ + if (drm_WARN_ON(bo->base.base.dev, bo->base.base.handle_count > 0)) + return; + + if (!label) + return; + + str = kstrdup_const(label, GFP_KERNEL); + if (!str) { + /* Failing to allocate memory for a label isn't a fatal condition */ + drm_warn(bo->base.base.dev, "Not enough memory to allocate BO label"); + return; + } + + panfrost_gem_set_label(obj, str); +} + +#ifdef CONFIG_DEBUG_FS +struct gem_size_totals { + size_t size; + size_t resident; + size_t reclaimable; +}; + +struct flag_def { + u32 flag; + const char *name; +}; + +static void panfrost_gem_debugfs_print_flag_names(struct seq_file *m) +{ + int len; + int i; + + static const struct flag_def gem_state_flags_names[] = { + {PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED, "imported"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED, "exported"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED, "purged"}, + {PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE, "purgeable"}, + }; + + seq_puts(m, "GEM state flags: "); + for (i = 0, len = ARRAY_SIZE(gem_state_flags_names); i < len; i++) { + seq_printf(m, "%s (0x%x)%s", gem_state_flags_names[i].name, + gem_state_flags_names[i].flag, (i < len - 1) ? ", " : "\n\n"); + } +} + +static void panfrost_gem_debugfs_bo_print(struct panfrost_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_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 |= PANFROST_DEBUGFS_GEM_STATE_FLAG_IMPORTED; + if (bo->base.base.dma_buf) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_EXPORTED; + + if (bo->base.madv < 0) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGED; + else if (bo->base.madv > 0) + gem_state_flags |= PANFROST_DEBUGFS_GEM_STATE_FLAG_PURGEABLE; + + seq_printf(m, "0x%-10x", gem_state_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 panfrost_gem_debugfs_print_bos(struct panfrost_device *pfdev, + struct seq_file *m) +{ + struct gem_size_totals totals = {0}; + struct panfrost_gem_object *bo; + + panfrost_gem_debugfs_print_flag_names(m); + + seq_puts(m, "created-by global-name refcount size resident-size file-offset state label\n"); + seq_puts(m, "-----------------------------------------------------------------------------------------------------------------------------------\n"); + + scoped_guard(mutex, &pfdev->debugfs.gems_lock) { + list_for_each_entry(bo, &pfdev->debugfs.gems_list, debugfs.node) { + panfrost_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 |