host->max_segs =1; host->max_seg_size = PAGE_CACHE_SIZE; host->max_req_size = PAGE_CACHE_SIZE; host->max_blk_size =512; host->max_blk_count = PAGE_CACHE_SIZE /512; returnhost; free: kfree(host); returnNULL; } 1 14行是内核的高效搜索树,将host->index与host结构相关联,方便以...
We have set the mmc_host.max_seg_size to 8M, but the dma max segment size of PCI device is set to 64K by default in function pci_device_add(). The mmc_host.max_seg_size is used to set the max segment size of the blk queue. Then this mismatch will trigger a calltrace like ...
max_seg_size:一个segment最大为多少字节 max_segs:最多支持多少segments unused: max_req_size:一个request的最大字节个数 max_blk_size:一个mmc block的最大大小 max_blk_count:一个request的最大block数目 max_discard_to:最大的discard超时时间(ms) lock:spinlock_t类型mmc的互斥保护 ios:struct mmc_ios...
host->max_segs = 1; // 初始化最大支持段(由host自己根据硬件进行修改),可以通过/sys/block/mmcblk0/queue/max_segments进行修改 host->max_seg_size = PAGE_CACHE_SIZE; // 初始化段大小,(由host自己根据硬件进行修改) host->max_req_size = PAGE_CACHE_SIZE; // 一次MMC请求的最大字节数 host->...
mmc->max_req_size = mmc->max_seg_size * host->ring_size; mmc->max_blk_count = mmc->max_req_size /512; }elseif(host->use_dma == TRANS_MODE_EDMAC) { mmc->max_segs =64; mmc->max_blk_size =65535; mmc->max_blk_count =65535; ...
(host->mem->start,70resource_size(host->mem), pdev->name);//7172if(!host->mem) {73dev_err(&pdev->dev,"failed to request io memory region.\n");74ret = -ENOENT;75gotoprobe_free_gpio;76}7778host->base= ioremap(host->mem->start, resource_size(host->mem));//IO映射,将实地址...
MEM_SEG* USBH_ConfigureMemSeg() General-purpose heap . .MemSegPtr .MemSegBufPtr Asynchronous Task's Stack The asynchronous task handles all the USB transfer completions. This configuration allows you to set the stack pointer and the stack size (in quantity of elements). Type Function to call...
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static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_asix_rx_buffer[CONFIG_USBHOST_ASIX_ETH_MAX_SEGSZE]; static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_asix_tx_buffer[CONFIG_USBHOST_ASIX_ETH_MAX_SEGSZE]; static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t g_asix_...
[rtp] #音频mtu大小,该参数限制rtp最大字节数,推荐不要超过1400 #加大该值会明显增加直播延时 audioMtuSize=600 #视频mtu大小,该参数限制rtp最大字节数,推荐不要超过1400 videoMtuSize=1400 #rtp包最大长度限制,单位KB,主要用于识别TCP上下文破坏时,获取到错误的rtp rtpMaxSize=10 # rtp 打包时,低延迟开关,...