| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. |
| */ |
| |
| #include "msm_v4l2_private.h" |
| |
| static int convert_from_user(struct msm_vidc_arg *kp, unsigned long arg) |
| { |
| int rc = 0; |
| int i; |
| struct msm_vidc_arg __user *up = (struct msm_vidc_arg *)arg; |
| |
| if (!kp || !up) { |
| d_vpr_e("%s: invalid params%pK %pK\n", __func__, kp, up); |
| return -EINVAL; |
| } |
| |
| if (get_user(kp->type, &up->type)) |
| return -EFAULT; |
| |
| switch (kp->type) { |
| case MSM_CVP_GET_SESSION_INFO: |
| { |
| struct msm_cvp_session_info *k, *u; |
| |
| k = &kp->data.session; |
| u = &up->data.session; |
| if (get_user(k->session_id, &u->session_id)) |
| return -EFAULT; |
| for (i = 0; i < 10; i++) |
| if (get_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_REQUEST_POWER: |
| { |
| struct msm_cvp_request_power *k, *u; |
| |
| k = &kp->data.req_power; |
| u = &up->data.req_power; |
| if (get_user(k->clock_cycles_a, &u->clock_cycles_a) || |
| get_user(k->clock_cycles_b, &u->clock_cycles_b) || |
| get_user(k->ddr_bw, &u->ddr_bw) || |
| get_user(k->sys_cache_bw, &u->sys_cache_bw)) |
| return -EFAULT; |
| for (i = 0; i < 8; i++) |
| if (get_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_REGISTER_BUFFER: |
| { |
| struct msm_cvp_buffer *k, *u; |
| |
| k = &kp->data.regbuf; |
| u = &up->data.regbuf; |
| if (get_user(k->type, &u->type) || |
| get_user(k->index, &u->index) || |
| get_user(k->fd, &u->fd) || |
| get_user(k->size, &u->size) || |
| get_user(k->offset, &u->offset) || |
| get_user(k->pixelformat, &u->pixelformat) || |
| get_user(k->flags, &u->flags)) |
| return -EFAULT; |
| for (i = 0; i < 5; i++) |
| if (get_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_UNREGISTER_BUFFER: |
| { |
| struct msm_cvp_buffer *k, *u; |
| |
| k = &kp->data.unregbuf; |
| u = &up->data.unregbuf; |
| if (get_user(k->type, &u->type) || |
| get_user(k->index, &u->index) || |
| get_user(k->fd, &u->fd) || |
| get_user(k->size, &u->size) || |
| get_user(k->offset, &u->offset) || |
| get_user(k->pixelformat, &u->pixelformat) || |
| get_user(k->flags, &u->flags)) |
| return -EFAULT; |
| for (i = 0; i < 5; i++) |
| if (get_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| default: |
| d_vpr_e("%s: unknown cmd type 0x%x\n", |
| __func__, kp->type); |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static int convert_to_user(struct msm_vidc_arg *kp, unsigned long arg) |
| { |
| int rc = 0; |
| int i; |
| struct msm_vidc_arg __user *up = (struct msm_vidc_arg *)arg; |
| |
| if (!kp || !up) { |
| d_vpr_e("%s: invalid params %pK %pK\n", __func__, kp, up); |
| return -EINVAL; |
| } |
| |
| if (put_user(kp->type, &up->type)) |
| return -EFAULT; |
| |
| switch (kp->type) { |
| case MSM_CVP_GET_SESSION_INFO: |
| { |
| struct msm_cvp_session_info *k, *u; |
| |
| k = &kp->data.session; |
| u = &up->data.session; |
| if (put_user(k->session_id, &u->session_id)) |
| return -EFAULT; |
| for (i = 0; i < 10; i++) |
| if (put_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_REQUEST_POWER: |
| { |
| struct msm_cvp_request_power *k, *u; |
| |
| k = &kp->data.req_power; |
| u = &up->data.req_power; |
| if (put_user(k->clock_cycles_a, &u->clock_cycles_a) || |
| put_user(k->clock_cycles_b, &u->clock_cycles_b) || |
| put_user(k->ddr_bw, &u->ddr_bw) || |
| put_user(k->sys_cache_bw, &u->sys_cache_bw)) |
| return -EFAULT; |
| for (i = 0; i < 8; i++) |
| if (put_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_REGISTER_BUFFER: |
| { |
| struct msm_cvp_buffer *k, *u; |
| |
| k = &kp->data.regbuf; |
| u = &up->data.regbuf; |
| if (put_user(k->type, &u->type) || |
| put_user(k->index, &u->index) || |
| put_user(k->fd, &u->fd) || |
| put_user(k->size, &u->size) || |
| put_user(k->offset, &u->offset) || |
| put_user(k->pixelformat, &u->pixelformat) || |
| put_user(k->flags, &u->flags)) |
| return -EFAULT; |
| for (i = 0; i < 5; i++) |
| if (put_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| case MSM_CVP_UNREGISTER_BUFFER: |
| { |
| struct msm_cvp_buffer *k, *u; |
| |
| k = &kp->data.unregbuf; |
| u = &up->data.unregbuf; |
| if (put_user(k->type, &u->type) || |
| put_user(k->index, &u->index) || |
| put_user(k->fd, &u->fd) || |
| put_user(k->size, &u->size) || |
| put_user(k->offset, &u->offset) || |
| put_user(k->pixelformat, &u->pixelformat) || |
| put_user(k->flags, &u->flags)) |
| return -EFAULT; |
| for (i = 0; i < 5; i++) |
| if (put_user(k->reserved[i], &u->reserved[i])) |
| return -EFAULT; |
| break; |
| } |
| default: |
| d_vpr_e("%s: unknown cmd type 0x%x\n", __func__, kp->type); |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| long msm_v4l2_private(struct file *filp, unsigned int cmd, unsigned long arg) |
| { |
| int rc; |
| struct msm_vidc_inst *inst; |
| struct msm_vidc_arg karg; |
| |
| if (!filp || !filp->private_data) { |
| d_vpr_e("%s: invalid params %pK\n", __func__, filp); |
| return -EINVAL; |
| } |
| |
| inst = container_of(filp->private_data, struct msm_vidc_inst, |
| event_handler); |
| memset(&karg, 0, sizeof(struct msm_vidc_arg)); |
| |
| /* |
| * the arg points to user space memory and needs |
| * to be converted to kernel space before using it. |
| * Check do_video_ioctl() for more details. |
| */ |
| if (convert_from_user(&karg, arg)) |
| return -EFAULT; |
| |
| rc = msm_vidc_private((void *)inst, cmd, &karg); |
| if (rc) { |
| d_vpr_e("%s: failed cmd type %x\n", __func__, karg.type); |
| return -EINVAL; |
| } |
| |
| if (convert_to_user(&karg, arg)) |
| return -EFAULT; |
| |
| return rc; |
| } |