coherent_dma_mask :用来分配连续一致性dma。 dma_mask:在dma_map_single->dma_map_page,dma_capable用。 先看默认设置。后续可以通过pci_set_dma_mask/pci_set_consistent_dma_mask分别设置 设置: int pci_setup_device(struct pci_dev *dev) { u32 class; u16 cmd; u8 hdr_type; int pos = 0; stru...
Initialize coherent_dma_mask when creating SM501 subdevices to fix the problem. Fixes: b6d6454 ("mfd: SM501 core driver") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Lee Jones <lee.jones@linaro.org>groeck authored and Lee Jones committed Aug 16, 2018 1 ...
* Set both the DMA mask and the coherent DMA mask to the same thing. * Note that we don't check the return value from dma_set_coherent_mask() * as the DMA API guarantees that the coherent DMA mask can be set to * the same or smaller than the streaming DMA mask. */ static inli...
dma_mask = DMA_BIT_MASK(8 * sizeof(dma_addr_t)); if (dma_set_coherent_mask(dev->device, dma_mask)) { axidma_err("Unable to set the DMA coherent mask.\n"); goto device_cleanup; } Then the character device would be created. ...
dma setup auto-activate unable to set coherent dma mask dma test not applicable怎么办 dma_getcurrentmemorytarget dma timeout【乾坤NB分时买卖全息版】●解套降低成本●——【最牛分时T+0高抛低吸利器】 [金钻指标-技术共享交流论坛] 本帖最后由 易指乾坤 于 2024-8-4 17:45 编辑 乾坤NB分时买卖是本...