Messages in this thread | | | Date | Tue, 06 Feb 2007 15:57:31 +0100 | From | Bernardo Innocenti <> | Subject | Re: [Linux-fbdev-devel] How to mmap a shadow framebuffer in virtual memory |
| |
Bernardo Innocenti wrote:
> I still couldn't solve my problem, but thanks for helping. > > The way you map memory in ps3fb_mmap() is basically the same. > In my case, memory is allocated with __get_free_pages() instead > of being at an absolute physical address, but I can't see how > it could make any difference.
A few weeks ago I found the solution, which I report here to help people who are googling for the same problem.
consistent_alloc() performed all the required magic to allocate a contiguous buffer in phisical memory:
- if (!(fb_info.shadow = (void *)__get_free_pages(GFP_KERNEL, OLED_MEMORDER)) + if (!(fb_info.shadow = consistent_alloc(GFP_KERNEL, PAGE_ALIGN(OLED_MEMSIZE), + &fb_info.shadow_phys, PTE_BUFFERABLE))
The complete patch set is here, just in case:
http://www.develer.com/patches/linux/pending/
-- // Bernardo Innocenti - Develer S.r.l., R&D dept. \X/ http://www.develer.com/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |