On Tue, Jun 11, 2024, at 13:37, Stefan Wahren wrote:
> Am 11.06.24 um 13:08 schrieb Arnd Bergmann:
>> On Tue, Jun 11, 2024, at 12:47, Stefan Wahren wrote:
>
> if (len == 0)
> pr_warn_once("%s: sg_dma_len() == 0\n", __func__);
> else if (i && (i != (dma_buffers - 1)) && (len & ~PAGE_MASK))
> pr_warn_once("%s: following block not page aligned\n",
> __func__);
> else if (i && (addr & ~PAGE_MASK)) {
> pr_warn_once("%s: block %u, DMA address %pad doesn't align
> with PAGE_MASK 0x%lx\n", __func__, i, &addr, PAGE_MASK);
> pr_warn_once("sg_dma_is_swiotlb: %d, dma_flags: %x\n",
> sg_dma_is_swiotlb(sg), sg->dma_flags);
> pr_warn_once("type = %s\n", (type == PAGELIST_WRITE) ?
> "PAGELIST_WRITE" : "PAGELIST_READ");
> if (buf)
> pr_warn_once("buf = %p, count = %zu\n", buf, count);
> else
> pr_warn_once("ubuf = %p, count = %zu\n", ubuf, count);
> }
>
> Output:
>
> [ 66.184030] create_pagelist: block 1, DMA address 0x00000000f5fc7800
> doesn't align with PAGE_MASK 0xfffffffffffff000
> [ 66.184056] sg_dma_is_swiotlb: 0, dma_flags: 0
> [ 66.184063] type = PAGELIST_READ
> [ 66.184066] ubuf = 00000000266a70a7, count = 0
