+++ /dev/null
-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 */
projects / openwrt / openwrt.git / blobdiff