| 29,6 → 29,7 |
|---|
| */ |
| |
| #include <linux/export.h> |
| #include <linux/scatterlist.h> |
| #include <drm/drmP.h> |
| |
| extern int x86_clflush_size; |
| 37,6 → 38,7 |
|---|
| { |
| asm volatile("clflush %0" : "+m" (*(volatile char*)__p)); |
| } |
| |
| #if 0 |
| static void |
| drm_clflush_page(struct page *page) |
| 75,12 → 77,12 |
|---|
| void |
| drm_clflush_pages(struct page *pages[], unsigned long num_pages) |
| { |
| uint8_t *page_virtual; |
| uint8_t *pva; |
| unsigned int i, j; |
| |
| page_virtual = AllocKernelSpace(4096); |
| pva = AllocKernelSpace(4096); |
| |
| if(page_virtual != NULL) |
| if(pva != NULL) |
| { |
| dma_addr_t *src, *dst; |
| u32 count; |
| 88,44 → 90,45 |
|---|
| for (i = 0; i < num_pages; i++) |
| { |
| mb(); |
| // asm volatile("mfence"); |
| |
| MapPage(page_virtual,*pages++, 0x001); |
| MapPage(pva, page_to_phys(pages[i]), 0x001); |
| for (j = 0; j < PAGE_SIZE; j += x86_clflush_size) |
| clflush(page_virtual + j); |
| mb(); |
| clflush(pva + j); |
| } |
| FreeKernelSpace(page_virtual); |
| FreeKernelSpace(pva); |
| } |
| |
| mb(); |
| } |
| EXPORT_SYMBOL(drm_clflush_pages); |
| |
| #if 0 |
| void |
| drm_clflush_sg(struct sg_table *st) |
| { |
| #if defined(CONFIG_X86) |
| if (cpu_has_clflush) { |
| struct sg_page_iter sg_iter; |
| struct page *page; |
| |
| uint8_t *pva; |
| unsigned int i; |
| |
| pva = AllocKernelSpace(4096); |
| if( pva != NULL) |
| { |
| mb(); |
| for_each_sg_page(st->sgl, &sg_iter, st->nents, 0) |
| drm_clflush_page(sg_page_iter_page(&sg_iter)); |
| mb(); |
| { |
| page = sg_page_iter_page(&sg_iter); |
| |
| return; |
| } |
| MapPage(pva,page_to_phys(page), 0x001); |
| |
| if (on_each_cpu(drm_clflush_ipi_handler, NULL, 1) != 0) |
| printk(KERN_ERR "Timed out waiting for cache flush.\n"); |
| #else |
| printk(KERN_ERR "Architecture has no drm_cache.c support\n"); |
| WARN_ON_ONCE(1); |
| #endif |
| for (i = 0; i < PAGE_SIZE; i += x86_clflush_size) |
| clflush(pva + i); |
| }; |
| FreeKernelSpace(pva); |
| }; |
| mb(); |
| } |
| EXPORT_SYMBOL(drm_clflush_sg); |
| |
| #if 0 |
| void |
| drm_clflush_virt_range(char *addr, unsigned long length) |
| { |