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Commit 732026b4 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "msm: kgsl: Limit the maximum number of contexts"

parents 052afd56 e80a5a18

drivers/gpu/msm/kgsl.c

+13 −1
Original line number Diff line number Diff line
@@ -513,6 +513,16 @@ int kgsl_context_init(struct kgsl_device_private *dev_priv, 
	struct kgsl_device *device = dev_priv->device;

	char name[64];

	int ret = 0, id;

	struct kgsl_process_private  *proc_priv = dev_priv->process_priv;



	if (atomic_read(&proc_priv->ctxt_count) > KGSL_MAX_CONTEXTS_PER_PROC) {

		KGSL_DRV_ERR(device,

			"Per process context limit reached for pid %u",

			dev_priv->process_priv->pid);

		return -ENOSPC;

	}



	atomic_inc(&proc_priv->ctxt_count);



	id = _kgsl_get_context_id(device);

	if (id == -ENOSPC) {
@@ -531,7 +541,7 @@ int kgsl_context_init(struct kgsl_device_private *dev_priv, 
			KGSL_DRV_INFO(device,

				"cannot have more than %zu contexts due to memstore limitation\n",

				KGSL_MEMSTORE_MAX);



		atomic_dec(&proc_priv->ctxt_count);

		return id;

	}
@@ -562,6 +572,7 @@ int kgsl_context_init(struct kgsl_device_private *dev_priv, 


out:

	if (ret) {

		atomic_dec(&proc_priv->ctxt_count);

		write_lock(&device->context_lock);

		idr_remove(&dev_priv->device->context_idr, id);

		write_unlock(&device->context_lock);
@@ -645,6 +656,7 @@ kgsl_context_destroy(struct kref *kref) 
			device->pwrctrl.constraint.type = KGSL_CONSTRAINT_NONE;

		}



		atomic_dec(&context->proc_priv->ctxt_count);

		idr_remove(&device->context_idr, context->id);

		context->id = KGSL_CONTEXT_INVALID;

	}

drivers/gpu/msm/kgsl.h

+2 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2008-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2008-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -37,6 +37,7 @@ 
#define KGSL_PRIORITY_MAX_RB_LEVELS 4

#define KGSL_MEMSTORE_MAX	(KGSL_MEMSTORE_SIZE / \

	sizeof(struct kgsl_devmemstore) - 1 - KGSL_PRIORITY_MAX_RB_LEVELS)

#define KGSL_MAX_CONTEXTS_PER_PROC 200



#define MEMSTORE_RB_OFFSET(rb, field)	\

	KGSL_MEMSTORE_OFFSET(((rb)->id + KGSL_MEMSTORE_MAX), field)

drivers/gpu/msm/kgsl_device.h

+3 −1
Original line number Diff line number Diff line 
/* Copyright (c) 2002,2007-2017, The Linux Foundation. All rights reserved.

/* Copyright (c) 2002,2007-2018, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -407,6 +407,7 @@ struct kgsl_context { 
 * @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

 * @ctxt_count: Count for the number of contexts for this process

 */

struct kgsl_process_private {

	unsigned long priv;
@@ -426,6 +427,7 @@ struct kgsl_process_private { 
	struct idr syncsource_idr;

	spinlock_t syncsource_lock;

	int fd_count;

	atomic_t ctxt_count;

};



/**