在 2021/8/12 下午4:54, Arnd Bergmann 写道:
On Thu, Aug 12, 2021 at 10:08 AM Xianting TIan
wrote:
在 2021/8/6 下午10:51, Arnd Bergmann 写道:
On Fri, Aug 6, 2021 at 5:01 AM Xianting Tian
+#define __ALIGNED__ __attribute__((__aligned__(sizeof(long
I think you need a higher alignment for DMA buffers
On Thu, Aug 12, 2021 at 10:08 AM Xianting TIan
wrote:
> 在 2021/8/6 下午10:51, Arnd Bergmann 写道:
> > On Fri, Aug 6, 2021 at 5:01 AM Xianting Tian
> >> +#define __ALIGNED__ __attribute__((__aligned__(sizeof(long
> > I think you need a higher alignment for DMA buffers, instead of
> > sizeof(long),
在 2021/8/6 下午10:51, Arnd Bergmann 写道:
On Fri, Aug 6, 2021 at 5:01 AM Xianting Tian
wrote:
@@ -163,6 +155,13 @@ static void hvc_console_print(struct console *co, const
char *b,
if (vtermnos[index] == -1)
return;
+ list_for_each_entry(hp, &hvc_structs, next)
+
在 2021/8/6 下午10:51, Arnd Bergmann 写道:
On Fri, Aug 6, 2021 at 5:01 AM Xianting Tian
wrote:
@@ -163,6 +155,13 @@ static void hvc_console_print(struct console *co, const
char *b,
if (vtermnos[index] == -1)
return;
+ list_for_each_entry(hp, &hvc_structs, next)
+
On Fri, Aug 6, 2021 at 5:01 AM Xianting Tian
wrote:
> @@ -163,6 +155,13 @@ static void hvc_console_print(struct console *co, const
> char *b,
> if (vtermnos[index] == -1)
> return;
>
> + list_for_each_entry(hp, &hvc_structs, next)
> + if (hp->vtermno ==
As well known, hvc backend can register its opertions to hvc backend.
the opertions contain put_chars(), get_chars() and so on.
Some hvc backend may do dma in its opertions. eg, put_chars() of
virtio-console. But in the code of hvc framework, it may pass DMA
incapable memory to put_chars() under a
