request_mem_region()解决方案: I'm a bit surprised that this works for you at all. The is passed a value of which is within the physical address range of system RAM, :. I'd guess that the (initial) error return is an indicator that the kernel has already installed this physical memor...
request_mem_region(S1D_PHYSICAL_REG_ADDR,S1D_PHYSICAL_REG_SIZE, "EpsonFB_RG") #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) __request_region检查是否可以安全占用起始物理地址S1D_PHYSICAL_REG_ADDR之后的连续S1D_PHYSICAL_REG_SIZE字节大小空...
request_mem_region(S1D_PHYSICAL_REG_ADDR,S1D_PHYSICAL_REG_SIZE, "EpsonFB_RG") #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) __request_region检查是否可以安全占用起始物理地址S1D_PHYSICAL_REG_ADDR之后的连续S1D_PHYSICAL_REG_SIZE字节大小空...
PCI-X是PCI总线的扩展架构，PCI-X频率不像PCI那样固定，而是可以随着设备的变化而变化的。PCI-X采用64...
pr_debug("request_mem_region failed\n"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed\n"); retval = -EIO; goto err2; } hcd->rsrc_start = pdev->resource[0].start; hcd->rsrc_len = pde...
if (!request_mem_region(sgdma_rx_base, sgdma_rx_size, "altera_tse")) { printk(KERN_ERR "ERROR: %s:%d: request_mem_region() failed\n", __FILE__, __LINE__); ret = -EBUSY; goto out_sgdma_rx; } by if (!request_mem_region(sgdma_rx_base, sgdma_rx_size, "altera_tse"...
#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) __request_region检查是否可以安全占用起始物理地址S1D_PHYSICAL_REG_ADDR之后的连续S1D_PHYSICAL_REG_SIZE字节大小空间 struct resource * __request_region(struct resource *parent, unsigned long start,...
驱动提供 ioctl 功能调用，其它模块是用户进程，调用这个 ioctl 就行了。
request_mem_region //将指定的地址范围注册到系统中//第一个参数 是地址//第二个参数 是size//第三个参数 是名称#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name), 0)structresource*__request_region(structresource*parent,resource_size_tstart,...
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