diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0550-staging-vc-sm-cma-Add-in-userspace-allocation-API.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0550-staging-vc-sm-cma-Add-in-userspace-allocation-API.patch | 675 |
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 */ |