From: Yair Shachar yair.shachar@amd.com
Signed-off-by: Yair Shachar yair.shachar@amd.com Signed-off-by: Oded Gabbay oded.gabbay@gmail.com --- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 88 +++++++++++++++++++++++++++++++- 1 file changed, 87 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index 5b9776d..6288084 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -537,7 +537,93 @@ static int kfd_ioctl_dbg_address_watch(struct file *filep, static int kfd_ioctl_dbg_wave_control(struct file *filep, struct kfd_process *p, void *data) { - long status = -EFAULT; + struct kfd_ioctl_dbg_wave_control_args *args = data; + struct kfd_dev *dev; + struct dbg_wave_control_info wac_info; + unsigned char *args_buff; + uint32_t computed_buff_size; + long status; + unsigned int args_idx = 0; + + memset((void *) &wac_info, 0, sizeof(struct dbg_wave_control_info)); + + /* we use compact form, independent of the packing attribute value */ + computed_buff_size = sizeof(*args) + + sizeof(wac_info.mode) + + sizeof(wac_info.operand) + + sizeof(wac_info.dbgWave_msg.DbgWaveMsg) + + sizeof(wac_info.dbgWave_msg.MemoryVA) + + sizeof(wac_info.trapId); + + dev = kfd_device_by_id(args->gpu_id); + if (dev == NULL) + return -EINVAL; + + if (dev->device_info->asic_family == CHIP_CARRIZO) { + pr_debug("kfd_ioctl_dbg_wave_control not supported on CZ\n"); + return -EINVAL; + } + + /* input size must match the computed "compact" size */ + if (args->buf_size_in_bytes != computed_buff_size) { + pr_debug("size mismatch, computed : actual %u : %u\n", + args->buf_size_in_bytes, computed_buff_size); + return -EINVAL; + } + + /* this is the actual buffer to work with */ + + args_buff = kzalloc(args->buf_size_in_bytes - sizeof(*args), + GFP_KERNEL); + + if (args_buff == NULL) + return -ENOMEM; + + if (args->content_ptr == NULL) { + kfree(args_buff); + return -EINVAL; + } + + /* Now copy the entire buffer from user */ + status = copy_from_user(args_buff, + (void __user *) args->content_ptr, + args->buf_size_in_bytes - sizeof(*args)); + if (status != 0) { + pr_debug("Failed to copy wave control user data\n"); + kfree(args_buff); + return -EINVAL; + } + + /* move ptr to the start of the "pay-load" area */ + wac_info.process = p; + + wac_info.operand = *((enum HSA_DBG_WAVEOP *)(&args_buff[args_idx])); + args_idx += sizeof(wac_info.operand); + + wac_info.mode = *((enum HSA_DBG_WAVEMODE *)(&args_buff[args_idx])); + args_idx += sizeof(wac_info.mode); + + wac_info.trapId = *((uint32_t *)(&args_buff[args_idx])); + args_idx += sizeof(wac_info.trapId); + + wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value = + *((uint32_t *)(&args_buff[args_idx])); + wac_info.dbgWave_msg.MemoryVA = NULL; + + mutex_lock(get_dbgmgr_mutex()); + + pr_debug("Calling dbg manager process %p, operand %u, mode %u, trapId %u, message %u\n", + wac_info.process, wac_info.operand, + wac_info.mode, wac_info.trapId, + wac_info.dbgWave_msg.DbgWaveMsg.WaveMsgInfoGen2.Value); + + status = kfd_dbgmgr_wave_control(dev->dbgmgr, &wac_info); + + pr_debug("Returned status of dbg manager is %ld\n", status); + + mutex_unlock(get_dbgmgr_mutex()); + + kfree(args_buff);
return status; }