> +struct dma_range {
> + dma_addr_t dma;
> + u32 mapping_size;
> +};
That's a rather generic name that is bound to create a conflict sooner
or later.
> #include "hyperv_net.h"
> #include "netvsc_trace.h"
> +#include "../../hv/hyperv_vmbus.h"
Please move public interfaces out of the private header rather than doing
this.
> + if (hv_isolation_type_snp()) {
> + area = get_vm_area(buf_size, VM_IOREMAP);
Err, no. get_vm_area is private a for a reason.
> + if (!area)
> + goto cleanup;
> +
> + vaddr = (unsigned long)area->addr;
> + for (i = 0; i < buf_size / HV_HYP_PAGE_SIZE; i++) {
> + extra_phys = (virt_to_hvpfn(net_device->recv_buf + i * HV_HYP_PAGE_SIZE)
> + << HV_HYP_PAGE_SHIFT) + ms_hyperv.shared_gpa_boundary;
> + ret |= ioremap_page_range(vaddr + i * HV_HYP_PAGE_SIZE,
> + vaddr + (i + 1) * HV_HYP_PAGE_SIZE,
> + extra_phys, PAGE_KERNEL_IO);
> + }
> +
> + if (ret)
> + goto cleanup;
And this is not something a driver should ever do. I think you are badly
reimplementing functionality that should be in the dma coherent allocator
here.
