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Commit 7c843c2a authored by Amit Kushwaha's avatar Amit Kushwaha
Browse files

msm: kgsl: create sysfs entries to expose memory usage 



Added sysfs entries to show kgsl memory usage statistics.
gpumem_mapped: kgsl memory mapped in the process address space.
gpumem_unmapped: kgsl allocated memory but not mapped in process.
imported_mem: graphics memory not allocated by the kgsl.

Below is the sysfs path for new entries:
/sys/class/kgsl/kgsl/proc/<pid>/

Change-Id: I08c2014d28dc0ca1e2b54ebf966d00143b303b54
Signed-off-by: default avatarAmit Kushwaha <kushwaha@codeaurora.org>
parent 61147a12

drivers/gpu/msm/kgsl.c

+10 −1
Original line number Diff line number Diff line
@@ -458,6 +458,10 @@ static void kgsl_mem_entry_detach_process(struct kgsl_mem_entry *entry) 


	type = kgsl_memdesc_usermem_type(&entry->memdesc);

	entry->priv->stats[type].cur -= entry->memdesc.size;



	if (type != KGSL_MEM_ENTRY_ION)

		entry->priv->gpumem_mapped -= entry->memdesc.mapsize;



	spin_unlock(&entry->priv->mem_lock);



	kgsl_mmu_put_gpuaddr(&entry->memdesc);
@@ -4132,13 +4136,18 @@ static int 
kgsl_gpumem_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)

{

	struct kgsl_mem_entry *entry = vma->vm_private_data;

	int ret;



	if (!entry)

		return VM_FAULT_SIGBUS;

	if (!entry->memdesc.ops || !entry->memdesc.ops->vmfault)

		return VM_FAULT_SIGBUS;



	return entry->memdesc.ops->vmfault(&entry->memdesc, vma, vmf);

	ret = entry->memdesc.ops->vmfault(&entry->memdesc, vma, vmf);

	if ((ret == 0) || (ret == VM_FAULT_NOPAGE))

		entry->priv->gpumem_mapped += PAGE_SIZE;



	return ret;

}



static void

drivers/gpu/msm/kgsl_device.h

+2 −0
Original line number Diff line number Diff line
@@ -446,6 +446,7 @@ struct kgsl_context { 
 * @kobj: Pointer to a kobj for the sysfs directory for this process

 * @debug_root: Pointer to the debugfs root for this process

 * @stats: Memory allocation statistics for this process

 * @gpumem_mapped: KGSL memory mapped in the process address space

 * @syncsource_idr: sync sources created by this process

 * @syncsource_lock: Spinlock to protect the syncsource idr

 * @fd_count: Counter for the number of FDs for this process
@@ -467,6 +468,7 @@ struct kgsl_process_private { 
		uint64_t cur;

		uint64_t max;

	} stats[KGSL_MEM_ENTRY_MAX];

	uint64_t gpumem_mapped;

	struct idr syncsource_idr;

	spinlock_t syncsource_lock;

	int fd_count;

drivers/gpu/msm/kgsl_sharedmem.c

+75 −0
Original line number Diff line number Diff line
@@ -97,6 +97,75 @@ struct mem_entry_stats { 


static void kgsl_cma_unlock_secure(struct kgsl_memdesc *memdesc);



static ssize_t

imported_mem_show(struct kgsl_process_private *priv,

				int type, char *buf)

{

	struct kgsl_mem_entry *entry;

	uint64_t imported_mem = 0;

	int id = 0;



	spin_lock(&priv->mem_lock);

	for (entry = idr_get_next(&priv->mem_idr, &id); entry;

		id++, entry = idr_get_next(&priv->mem_idr, &id)) {



		int egl_surface_count = 0, egl_image_count = 0;

		struct kgsl_memdesc *m;



		if (kgsl_mem_entry_get(entry) == 0)

			continue;

		spin_unlock(&priv->mem_lock);



		m = &entry->memdesc;

		if (kgsl_memdesc_usermem_type(m) == KGSL_MEM_ENTRY_ION) {

			kgsl_get_egl_counts(entry, &egl_surface_count,

					&egl_image_count);



			if (kgsl_memdesc_get_memtype(m) ==

						KGSL_MEMTYPE_EGL_SURFACE)

				imported_mem += m->size;

			else if (egl_surface_count == 0) {

				uint64_t size = m->size;



				do_div(size, (egl_image_count ?

							egl_image_count : 1));

				imported_mem += size;

			}

		}



		kgsl_mem_entry_put(entry);

		spin_lock(&priv->mem_lock);

	}

	spin_unlock(&priv->mem_lock);



	return scnprintf(buf, PAGE_SIZE, "%llu\n", imported_mem);

}



static ssize_t

gpumem_mapped_show(struct kgsl_process_private *priv,

				int type, char *buf)

{

	return scnprintf(buf, PAGE_SIZE, "%llu\n",

			priv->gpumem_mapped);

}



static ssize_t

gpumem_unmapped_show(struct kgsl_process_private *priv, int type, char *buf)

{

	if (priv->gpumem_mapped > priv->stats[type].cur)

		return -EIO;



	return scnprintf(buf, PAGE_SIZE, "%llu\n",

			priv->stats[type].cur - priv->gpumem_mapped);

}



static struct kgsl_mem_entry_attribute debug_memstats[] = {

	__MEM_ENTRY_ATTR(0, imported_mem, imported_mem_show),

	__MEM_ENTRY_ATTR(0, gpumem_mapped, gpumem_mapped_show),

	__MEM_ENTRY_ATTR(KGSL_MEM_ENTRY_KERNEL, gpumem_unmapped,

				gpumem_unmapped_show),

};



/**

 * Show the current amount of memory allocated for the given memtype

 */
@@ -219,7 +288,13 @@ void kgsl_process_init_sysfs(struct kgsl_device *device, 
			&mem_stats[i].max_attr.attr))

			WARN(1, "Couldn't create sysfs file '%s'\n",

				mem_stats[i].max_attr.attr.name);

	}



	for (i = 0; i < ARRAY_SIZE(debug_memstats); i++) {

		if (sysfs_create_file(&private->kobj,

			&debug_memstats[i].attr))

			WARN(1, "Couldn't create sysfs file '%s'\n",

				debug_memstats[i].attr.name);

	}

}