brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 675 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0550-staging-vc-sm-cma-Add-in-userspace-allocation-API.patch b/target/linux/bcm27xx/patches-4.19/950-0550-staging-vc-sm-cma-Add-in-userspace-allocation-API.patch
new file mode 100644
index 0000000000..53a936e993
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0550-staging-vc-sm-cma-Add-in-userspace-allocation-API.patch
@@ -0,0 +1,675 @@
+From 549c0266e570da686f19e4435d76411cd7137954 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.org>
+Date: Mon, 11 Mar 2019 16:35:23 +0000
+Subject: [PATCH] staging: vc-sm-cma: Add in userspace allocation API
+
+Replacing the functionality from the older vc-sm driver,
+add in a userspace API that allows allocation of buffers,
+and importing of dma-bufs.
+The driver hands out dma-buf fds, therefore much of the
+handling around lifespan and odd mmaps from the old driver
+goes away.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
+---
+ .../staging/vc04_services/vc-sm-cma/vc_sm.c   | 371 ++++++++++++++++--
+ .../vc04_services/vc-sm-cma/vc_sm_cma.c       |   3 +-
+ .../vc04_services/vc-sm-cma/vc_sm_cma.h       |   2 +-
+ include/linux/broadcom/vc_sm_cma_ioctl.h      |  87 ++++
+ 4 files changed, 435 insertions(+), 28 deletions(-)
+ create mode 100644 include/linux/broadcom/vc_sm_cma_ioctl.h
+
+--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
++++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
+@@ -36,6 +36,7 @@
+ #include <linux/fs.h>
+ #include <linux/kernel.h>
+ #include <linux/list.h>
++#include <linux/miscdevice.h>
+ #include <linux/module.h>
+ #include <linux/mm.h>
+ #include <linux/of_device.h>
+@@ -52,6 +53,7 @@
+ #include "vc_sm.h"
+ #include "vc_sm_cma.h"
+ #include "vc_sm_knl.h"
++#include <linux/broadcom/vc_sm_cma_ioctl.h>
+ 
+ /* ---- Private Constants and Types --------------------------------------- */
+ 
+@@ -83,6 +85,8 @@ struct sm_pde_t {
+ struct sm_state_t {
+ 	struct platform_device *pdev;
+ 
++	struct miscdevice misc_dev;
++
+ 	struct sm_instance *sm_handle;	/* Handle for videocore service. */
+ 	struct cma *cma_heap;
+ 
+@@ -346,7 +350,6 @@ static void vc_sm_release_resource(struc
+ 
+ defer:
+ 	mutex_unlock(&buffer->lock);
+-	return;
+ }
+ 
+ /* Create support for private data tracking. */
+@@ -381,7 +384,7 @@ static struct sg_table *dup_sg_table(str
+ 	ret = sg_alloc_table(new_table, table->nents, GFP_KERNEL);
+ 	if (ret) {
+ 		kfree(new_table);
+-		return ERR_PTR(-ENOMEM);
++		return ERR_PTR(ret);
+ 	}
+ 
+ 	new_sg = new_table->sgl;
+@@ -417,7 +420,7 @@ static int vc_sm_dma_buf_attach(struct d
+ 	table = dup_sg_table(buf->sg_table);
+ 	if (IS_ERR(table)) {
+ 		kfree(a);
+-		return -ENOMEM;
++		return PTR_ERR(table);
+ 	}
+ 
+ 	a->table = table;
+@@ -433,8 +436,8 @@ static int vc_sm_dma_buf_attach(struct d
+ 	return 0;
+ }
+ 
+-static void vc_sm_dma_buf_detatch(struct dma_buf *dmabuf,
+-				  struct dma_buf_attachment *attachment)
++static void vc_sm_dma_buf_detach(struct dma_buf *dmabuf,
++				 struct dma_buf_attachment *attachment)
+ {
+ 	struct vc_sm_dma_buf_attachment *a = attachment->priv;
+ 	struct vc_sm_buffer *buf = dmabuf->priv;
+@@ -544,6 +547,9 @@ static void vc_sm_dma_buf_release(struct
+ 	vc_sm_clean_up_dmabuf(buffer);
+ 	pr_debug("%s clean_up dmabuf done\n", __func__);
+ 
++	/* buffer->lock will be destroyed by vc_sm_release_resource if finished
++	 * with, otherwise unlocked. Do NOT unlock here.
++	 */
+ 	vc_sm_release_resource(buffer);
+ 	pr_debug("%s done\n", __func__);
+ }
+@@ -613,7 +619,7 @@ static const struct dma_buf_ops dma_buf_
+ 	.mmap = vc_sm_dmabuf_mmap,
+ 	.release = vc_sm_dma_buf_release,
+ 	.attach = vc_sm_dma_buf_attach,
+-	.detach = vc_sm_dma_buf_detatch,
++	.detach = vc_sm_dma_buf_detach,
+ 	.begin_cpu_access = vc_sm_dma_buf_begin_cpu_access,
+ 	.end_cpu_access = vc_sm_dma_buf_end_cpu_access,
+ 	.map = vc_sm_dma_buf_kmap,
+@@ -762,6 +768,7 @@ static const struct dma_buf_ops dma_buf_
+ int
+ vc_sm_cma_import_dmabuf_internal(struct vc_sm_privdata_t *private,
+ 				 struct dma_buf *dma_buf,
++				 int fd,
+ 				 struct dma_buf **imported_buf)
+ {
+ 	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
+@@ -775,10 +782,15 @@ vc_sm_cma_import_dmabuf_internal(struct
+ 	int status;
+ 
+ 	/* Setup our allocation parameters */
+-	pr_debug("%s: importing dma_buf %p\n", __func__, dma_buf);
++	pr_debug("%s: importing dma_buf %p/fd %d\n", __func__, dma_buf, fd);
+ 
+-	get_dma_buf(dma_buf);
+-	dma_buf = dma_buf;
++	if (fd < 0)
++		get_dma_buf(dma_buf);
++	else
++		dma_buf = dma_buf_get(fd);
++
++	if (!dma_buf)
++		return -EINVAL;
+ 
+ 	attach = dma_buf_attach(dma_buf, &sm_state->pdev->dev);
+ 	if (IS_ERR(attach)) {
+@@ -921,6 +933,10 @@ static int vc_sm_cma_vpu_alloc(u32 size,
+ 		return -ENOMEM;
+ 
+ 	mutex_init(&buffer->lock);
++	/* Acquire the mutex as vc_sm_release_resource will release it in the
++	 * error path.
++	 */
++	mutex_lock(&buffer->lock);
+ 
+ 	if (vc_sm_cma_buffer_allocate(sm_state->cma_heap, &buffer->alloc,
+ 				      aligned_size)) {
+@@ -976,6 +992,8 @@ static int vc_sm_cma_vpu_alloc(u32 size,
+ 
+ 	vc_sm_add_resource(sm_state->vpu_allocs, buffer);
+ 
++	mutex_unlock(&buffer->lock);
++
+ 	*ret_buffer = buffer;
+ 	return 0;
+ error:
+@@ -1065,6 +1083,297 @@ vc_sm_vpu_event(struct sm_instance *inst
+ 	}
+ }
+ 
++/* Userspace handling */
++/*
++ * Open the device.  Creates a private state to help track all allocation
++ * associated with this device.
++ */
++static int vc_sm_cma_open(struct inode *inode, struct file *file)
++{
++	/* Make sure the device was started properly. */
++	if (!sm_state) {
++		pr_err("[%s]: invalid device\n", __func__);
++		return -EPERM;
++	}
++
++	file->private_data = vc_sm_cma_create_priv_data(current->tgid);
++	if (!file->private_data) {
++		pr_err("[%s]: failed to create data tracker\n", __func__);
++
++		return -ENOMEM;
++	}
++
++	return 0;
++}
++
++/*
++ * Close the vcsm-cma device.
++ * All allocations are file descriptors to the dmabuf objects, so we will get
++ * the clean up request on those as those are cleaned up.
++ */
++static int vc_sm_cma_release(struct inode *inode, struct file *file)
++{
++	struct vc_sm_privdata_t *file_data =
++	    (struct vc_sm_privdata_t *)file->private_data;
++	int ret = 0;
++
++	/* Make sure the device was started properly. */
++	if (!sm_state || !file_data) {
++		pr_err("[%s]: invalid device\n", __func__);
++		ret = -EPERM;
++		goto out;
++	}
++
++	pr_debug("[%s]: using private data %p\n", __func__, file_data);
++
++	/* Terminate the private data. */
++	kfree(file_data);
++
++out:
++	return ret;
++}
++
++/*
++ * Allocate a shared memory handle and block.
++ * Allocation is from CMA, and then imported into the VPU mappings.
++ */
++int vc_sm_cma_ioctl_alloc(struct vc_sm_privdata_t *private,
++			  struct vc_sm_cma_ioctl_alloc *ioparam)
++{
++	DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
++	struct vc_sm_buffer *buffer = NULL;
++	struct vc_sm_import import = { 0 };
++	struct vc_sm_import_result result = { 0 };
++	struct dma_buf *dmabuf = NULL;
++	int aligned_size;
++	int ret = 0;
++	int status;
++	int fd = -1;
++
++	aligned_size = PAGE_ALIGN(ioparam->size);
++
++	if (!aligned_size)
++		return -EINVAL;
++
++	/* Allocate local buffer to track this allocation. */
++	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
++	if (!buffer) {
++		ret = -ENOMEM;
++		goto error;
++	}
++
++	if (vc_sm_cma_buffer_allocate(sm_state->cma_heap, &buffer->alloc,
++				      aligned_size)) {
++		pr_err("[%s]: cma alloc of %d bytes failed\n",
++		       __func__, aligned_size);
++		kfree(buffer);
++		return -ENOMEM;
++	}
++	buffer->sg_table = buffer->alloc.sg_table;
++
++	if (dma_map_sg(&sm_state->pdev->dev, buffer->sg_table->sgl,
++		       buffer->sg_table->nents, DMA_BIDIRECTIONAL) <= 0) {
++		pr_err("[%s]: dma_map_sg failed\n", __func__);
++		ret = -ENOMEM;
++		goto error;
++	}
++
++	import.type = VC_SM_ALLOC_NON_CACHED;
++	import.allocator = current->tgid;
++
++	if (*ioparam->name)
++		memcpy(import.name, ioparam->name, sizeof(import.name) - 1);
++	else
++		memcpy(import.name, VC_SM_RESOURCE_NAME_DEFAULT,
++		       sizeof(VC_SM_RESOURCE_NAME_DEFAULT));
++
++	mutex_init(&buffer->lock);
++	INIT_LIST_HEAD(&buffer->attachments);
++	memcpy(buffer->name, import.name,
++	       min(sizeof(buffer->name), sizeof(import.name) - 1));
++
++	exp_info.ops = &dma_buf_ops;
++	exp_info.size = aligned_size;
++	exp_info.flags = O_RDWR;
++	exp_info.priv = buffer;
++
++	dmabuf = dma_buf_export(&exp_info);
++	if (IS_ERR(dmabuf)) {
++		ret = PTR_ERR(dmabuf);
++		goto error;
++	}
++	buffer->dma_buf = dmabuf;
++
++	import.addr = (uint32_t)sg_dma_address(buffer->sg_table->sgl);
++	import.size = aligned_size;
++	import.kernel_id = (uint32_t)buffer;
++
++	/* Wrap it into a videocore buffer. */
++	status = vc_sm_cma_vchi_import(sm_state->sm_handle, &import, &result,
++				       &sm_state->int_trans_id);
++	if (status == -EINTR) {
++		pr_debug("[%s]: requesting import memory action restart (trans_id: %u)\n",
++			 __func__, sm_state->int_trans_id);
++		ret = -ERESTARTSYS;
++		private->restart_sys = -EINTR;
++		private->int_action = VC_SM_MSG_TYPE_IMPORT;
++		goto error;
++	} else if (status || !result.res_handle) {
++		pr_err("[%s]: failed to import memory on videocore (status: %u, trans_id: %u)\n",
++		       __func__, status, sm_state->int_trans_id);
++		ret = -ENOMEM;
++		goto error;
++	}
++
++	/* Keep track of the buffer we created. */
++	buffer->private = private;
++	buffer->vc_handle = result.res_handle;
++	buffer->size = import.size;
++	buffer->dma_addr = import.addr;
++	buffer->vpu_state = VPU_MAPPED;
++	//buffer->res_cached = ioparam->cached;
++
++	fd = dma_buf_fd(dmabuf, O_CLOEXEC);
++	if (fd < 0)
++		goto error;
++
++	vc_sm_add_resource(private, buffer);
++
++	pr_debug("[%s]: Added resource as fd %d, buffer %p, private %p, dma_addr %pad\n",
++		 __func__, fd, buffer, private, &buffer->dma_addr);
++
++	/* We're done */
++	ioparam->handle = fd;
++	ioparam->vc_handle = buffer->vc_handle;
++	ioparam->dma_addr = buffer->dma_addr;
++	return 0;
++
++error:
++	if (buffer) {
++		pr_err("[%s]: something failed - cleanup. ret %d\n", __func__,
++		       ret);
++
++		dma_buf_put(dmabuf);
++	}
++	return ret;
++}
++
++static long vc_sm_cma_ioctl(struct file *file, unsigned int cmd,
++			    unsigned long arg)
++{
++	int ret = 0;
++	unsigned int cmdnr = _IOC_NR(cmd);
++	struct vc_sm_privdata_t *file_data =
++	    (struct vc_sm_privdata_t *)file->private_data;
++
++	/* Validate we can work with this device. */
++	if (!sm_state || !file_data) {
++		pr_err("[%s]: invalid device\n", __func__);
++		return -EPERM;
++	}
++
++	pr_debug("[%s]: cmd %x tgid %u, owner %u\n", __func__, cmdnr,
++		 current->tgid, file_data->pid);
++
++	/* Action is a re-post of a previously interrupted action? */
++	if (file_data->restart_sys == -EINTR) {
++		struct vc_sm_action_clean_t action_clean;
++
++		pr_debug("[%s]: clean up of action %u (trans_id: %u) following EINTR\n",
++			 __func__, file_data->int_action,
++			 file_data->int_trans_id);
++
++		action_clean.res_action = file_data->int_action;
++		action_clean.action_trans_id = file_data->int_trans_id;
++
++		file_data->restart_sys = 0;
++	}
++
++	/* Now process the command. */
++	switch (cmdnr) {
++		/* New memory allocation.
++		 */
++	case VC_SM_CMA_CMD_ALLOC:
++	{
++		struct vc_sm_cma_ioctl_alloc ioparam;
++
++		/* Get the parameter data. */
++		if (copy_from_user
++		    (&ioparam, (void *)arg, sizeof(ioparam)) != 0) {
++			pr_err("[%s]: failed to copy-from-user for cmd %x\n",
++			       __func__, cmdnr);
++			ret = -EFAULT;
++			break;
++		}
++
++		ret = vc_sm_cma_ioctl_alloc(file_data, &ioparam);
++		if (!ret &&
++		    (copy_to_user((void *)arg, &ioparam,
++				  sizeof(ioparam)) != 0)) {
++			/* FIXME: Release allocation */
++			pr_err("[%s]: failed to copy-to-user for cmd %x\n",
++			       __func__, cmdnr);
++			ret = -EFAULT;
++		}
++		break;
++	}
++
++	case VC_SM_CMA_CMD_IMPORT_DMABUF:
++	{
++		struct vc_sm_cma_ioctl_import_dmabuf ioparam;
++		struct dma_buf *new_dmabuf;
++
++		/* Get the parameter data. */
++		if (copy_from_user
++		    (&ioparam, (void *)arg, sizeof(ioparam)) != 0) {
++			pr_err("[%s]: failed to copy-from-user for cmd %x\n",
++			       __func__, cmdnr);
++			ret = -EFAULT;
++			break;
++		}
++
++		ret = vc_sm_cma_import_dmabuf_internal(file_data,
++						       NULL,
++						       ioparam.dmabuf_fd,
++						       &new_dmabuf);
++
++		if (!ret) {
++			struct vc_sm_buffer *buf = new_dmabuf->priv;
++
++			ioparam.size = buf->size;
++			ioparam.handle = dma_buf_fd(new_dmabuf,
++						    O_CLOEXEC);
++			ioparam.vc_handle = buf->vc_handle;
++			ioparam.dma_addr = buf->dma_addr;
++
++			if (ioparam.handle < 0 ||
++			    (copy_to_user((void *)arg, &ioparam,
++					  sizeof(ioparam)) != 0)) {
++				dma_buf_put(new_dmabuf);
++				/* FIXME: Release allocation */
++				ret = -EFAULT;
++			}
++		}
++		break;
++	}
++
++	default:
++		ret = -EINVAL;
++		break;
++	}
++
++	return ret;
++}
++
++/* Device operations that we managed in this driver. */
++static const struct file_operations vc_sm_ops = {
++	.owner = THIS_MODULE,
++	.unlocked_ioctl = vc_sm_cma_ioctl,
++	.open = vc_sm_cma_open,
++	.release = vc_sm_cma_release,
++};
++
++/* Driver load/unload functions */
+ /* Videocore connected.  */
+ static void vc_sm_connected_init(void)
+ {
+@@ -1075,12 +1384,11 @@ static void vc_sm_connected_init(void)
+ 
+ 	pr_info("[%s]: start\n", __func__);
+ 
+-	if (vc_sm_cma_add_heaps(&sm_state->cma_heap) ||
+-	    !sm_state->cma_heap) {
+-		pr_err("[%s]: failed to initialise CMA heaps\n",
++	vc_sm_cma_add_heaps(&sm_state->cma_heap);
++	if (!sm_state->cma_heap) {
++		pr_err("[%s]: failed to initialise CMA heap\n",
+ 		       __func__);
+-		ret = -EIO;
+-		goto err_free_mem;
++		return;
+ 	}
+ 
+ 	/*
+@@ -1092,8 +1400,7 @@ static void vc_sm_connected_init(void)
+ 		pr_err("[%s]: failed to initialise VCHI instance (ret=%d)\n",
+ 		       __func__, ret);
+ 
+-		ret = -EIO;
+-		goto err_failed;
++		return;
+ 	}
+ 
+ 	ret = vchi_connect(NULL, 0, vchi_instance);
+@@ -1101,8 +1408,7 @@ static void vc_sm_connected_init(void)
+ 		pr_err("[%s]: failed to connect VCHI instance (ret=%d)\n",
+ 		       __func__, ret);
+ 
+-		ret = -EIO;
+-		goto err_failed;
++		return;
+ 	}
+ 
+ 	/* Initialize an instance of the shared memory service. */
+@@ -1112,8 +1418,7 @@ static void vc_sm_connected_init(void)
+ 		pr_err("[%s]: failed to initialize shared memory service\n",
+ 		       __func__);
+ 
+-		ret = -EPERM;
+-		goto err_failed;
++		return;
+ 	}
+ 
+ 	/* Create a debug fs directory entry (root). */
+@@ -1127,11 +1432,22 @@ static void vc_sm_connected_init(void)
+ 
+ 	INIT_LIST_HEAD(&sm_state->buffer_list);
+ 
++	/* Create a shared memory device. */
++	sm_state->misc_dev.minor = MISC_DYNAMIC_MINOR;
++	sm_state->misc_dev.name = DEVICE_NAME;
++	sm_state->misc_dev.fops = &vc_sm_ops;
++	sm_state->misc_dev.parent = NULL;
++	ret = misc_register(&sm_state->misc_dev);
++	if (ret) {
++		pr_err("vcsm-cma: failed to register misc device.\n");
++		goto err_remove_debugfs;
++	}
++
+ 	sm_state->data_knl = vc_sm_cma_create_priv_data(0);
+ 	if (!sm_state->data_knl) {
+ 		pr_err("[%s]: failed to create kernel private data tracker\n",
+ 		       __func__);
+-		goto err_remove_shared_memory;
++		goto err_remove_misc_dev;
+ 	}
+ 
+ 	version.version = 2;
+@@ -1148,11 +1464,13 @@ static void vc_sm_connected_init(void)
+ 	pr_info("[%s]: installed successfully\n", __func__);
+ 	return;
+ 
+-err_remove_shared_memory:
++err_remove_misc_dev:
++	misc_deregister(&sm_state->misc_dev);
++err_remove_debugfs:
+ 	debugfs_remove_recursive(sm_state->dir_root);
+ 	vc_sm_cma_vchi_stop(&sm_state->sm_handle);
+-err_failed:
+-	pr_info("[%s]: failed, ret %d\n", __func__, ret);
++
++	return;
+ }
+ 
+ /* Driver loading. */
+@@ -1184,6 +1502,8 @@ static int bcm2835_vc_sm_cma_remove(stru
+ {
+ 	pr_debug("[%s]: start\n", __func__);
+ 	if (sm_inited) {
++		misc_deregister(&sm_state->misc_dev);
++
+ 		/* Remove all proc entries. */
+ 		debugfs_remove_recursive(sm_state->dir_root);
+ 
+@@ -1202,6 +1522,7 @@ static int bcm2835_vc_sm_cma_remove(stru
+ 	return 0;
+ }
+ 
++/* Kernel API calls */
+ /* Get an internal resource handle mapped from the external one. */
+ int vc_sm_cma_int_handle(void *handle)
+ {
+@@ -1252,7 +1573,7 @@ int vc_sm_cma_import_dmabuf(struct dma_b
+ 	}
+ 
+ 	ret = vc_sm_cma_import_dmabuf_internal(sm_state->data_knl, src_dmabuf,
+-					       &new_dma_buf);
++					       -1, &new_dma_buf);
+ 
+ 	if (!ret) {
+ 		pr_debug("%s: imported to ptr %p\n", __func__, new_dma_buf);
+--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma.c
++++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma.c
+@@ -92,8 +92,7 @@ int __vc_sm_cma_add_heaps(struct cma *cm
+ 	return 0;
+ }
+ 
+-int vc_sm_cma_add_heaps(struct cma **cma_heap)
++void vc_sm_cma_add_heaps(struct cma **cma_heap)
+ {
+ 	cma_for_each_area(__vc_sm_cma_add_heaps, cma_heap);
+-	return 0;
+ }
+--- a/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma.h
++++ b/drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma.h
+@@ -34,6 +34,6 @@ int vc_sm_cma_buffer_allocate(struct cma
+ 			      unsigned long len);
+ void vc_sm_cma_buffer_free(struct vc_sm_cma_alloc_data *buffer);
+ 
+-int vc_sm_cma_add_heaps(struct cma **cma_heap);
++void vc_sm_cma_add_heaps(struct cma **cma_heap);
+ 
+ #endif
+--- /dev/null
++++ b/include/linux/broadcom/vc_sm_cma_ioctl.h
+@@ -0,0 +1,87 @@
++/* SPDX-License-Identifier: GPL-2.0 */
++
++/*
++ * Copyright 2019 Raspberry Pi (Trading) Ltd.  All rights reserved.
++ *
++ * Based on vmcs_sm_ioctl.h Copyright Broadcom Corporation.
++ */
++
++#ifndef __VC_SM_CMA_IOCTL_H
++#define __VC_SM_CMA_IOCTL_H
++
++/* ---- Include Files ---------------------------------------------------- */
++
++#if defined(__KERNEL__)
++#include <linux/types.h>	/* Needed for standard types */
++#else
++#include <stdint.h>
++#endif
++
++#include <linux/ioctl.h>
++
++/* ---- Constants and Types ---------------------------------------------- */
++
++#define VC_SM_CMA_RESOURCE_NAME               32
++#define VC_SM_CMA_RESOURCE_NAME_DEFAULT       "sm-host-resource"
++
++/* Type define used to create unique IOCTL number */
++#define VC_SM_CMA_MAGIC_TYPE                  'J'
++
++/* IOCTL commands on /dev/vc-sm-cma */
++enum vc_sm_cma_cmd_e {
++	VC_SM_CMA_CMD_ALLOC = 0x5A,	/* Start at 0x5A arbitrarily */
++
++	VC_SM_CMA_CMD_IMPORT_DMABUF,
++
++	VC_SM_CMA_CMD_LAST	/* Do not delete */
++};
++
++/* Cache type supported, conveniently matches the user space definition in
++ * user-vcsm.h.
++ */
++enum vc_sm_cma_cache_e {
++	VC_SM_CMA_CACHE_NONE,
++	VC_SM_CMA_CACHE_HOST,
++	VC_SM_CMA_CACHE_VC,
++	VC_SM_CMA_CACHE_BOTH,
++};
++
++/* IOCTL Data structures */
++struct vc_sm_cma_ioctl_alloc {
++	/* user -> kernel */
++	__u32 size;
++	__u32 num;
++	__u32 cached;		/* enum vc_sm_cma_cache_e */
++	__u32 pad;
++	__u8 name[VC_SM_CMA_RESOURCE_NAME];
++
++	/* kernel -> user */
++	__s32 handle;
++	__u32 vc_handle;
++	__u64 dma_addr;
++};
++
++struct vc_sm_cma_ioctl_import_dmabuf {
++	/* user -> kernel */
++	__s32 dmabuf_fd;
++	__u32 cached;		/* enum vc_sm_cma_cache_e */
++	__u8 name[VC_SM_CMA_RESOURCE_NAME];
++
++	/* kernel -> user */
++	__s32 handle;
++	__u32 vc_handle;
++	__u32 size;
++	__u32 pad;
++	__u64 dma_addr;
++};
++
++/* IOCTL numbers */
++#define VC_SM_CMA_IOCTL_MEM_ALLOC\
++	_IOR(VC_SM_CMA_MAGIC_TYPE, VC_SM_CMA_CMD_ALLOC,\
++	 struct vc_sm_cma_ioctl_alloc)
++
++#define VC_SM_CMA_IOCTL_MEM_IMPORT_DMABUF\
++	_IOR(VC_SM_CMA_MAGIC_TYPE, VC_SM_CMA_CMD_IMPORT_DMABUF,\
++	 struct vc_sm_cma_ioctl_import_dmabuf)
++
++#endif /* __VC_SM_CMA_IOCTL_H */