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Dynamically allocate the vrings' DMA when the remote processor is about to be powered on (i.e. when ->find_vqs() is invoked), and release them as soon as it is powered off (i.e. when ->del_vqs() is invoked). The obvious and immediate benefit is better memory utilization, since memory for the vrings is now only allocated when the relevant remote processor is used. Additionally, this approach also makes recovery of a (crashing) remote processor easier: one just needs to remove the relevant vdevs, and the entire vrings cleanup takes place automagically. Tested-by: Fernando Guzman Lugo <fernando.lugo@ti.com> Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* Remote processor framework
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*
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* Copyright (C) 2011 Texas Instruments, Inc.
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* Copyright (C) 2011 Google, Inc.
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*
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* Ohad Ben-Cohen <ohad@wizery.com>
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* Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef REMOTEPROC_INTERNAL_H
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#define REMOTEPROC_INTERNAL_H
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#include <linux/irqreturn.h>
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struct rproc;
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/* from remoteproc_core.c */
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void rproc_release(struct kref *kref);
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irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
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/* from remoteproc_virtio.c */
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int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);
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void rproc_remove_virtio_dev(struct rproc_vdev *rvdev);
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/* from remoteproc_debugfs.c */
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void rproc_remove_trace_file(struct dentry *tfile);
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struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
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struct rproc_mem_entry *trace);
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void rproc_delete_debug_dir(struct rproc *rproc);
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void rproc_create_debug_dir(struct rproc *rproc);
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void rproc_init_debugfs(void);
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void rproc_exit_debugfs(void);
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void rproc_free_vring(struct rproc_vring *rvring);
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int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
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#endif /* REMOTEPROC_INTERNAL_H */
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