diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
---|---|---|
committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c')
-rw-r--r-- | kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c | 124 |
1 files changed, 2 insertions, 122 deletions
diff --git a/kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c b/kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c index 147069938..b847e9403 100644 --- a/kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c +++ b/kernel/arch/powerpc/platforms/cell/spufs/lscsa_alloc.c @@ -31,7 +31,7 @@ #include "spufs.h" -static int spu_alloc_lscsa_std(struct spu_state *csa) +int spu_alloc_lscsa(struct spu_state *csa) { struct spu_lscsa *lscsa; unsigned char *p; @@ -48,7 +48,7 @@ static int spu_alloc_lscsa_std(struct spu_state *csa) return 0; } -static void spu_free_lscsa_std(struct spu_state *csa) +void spu_free_lscsa(struct spu_state *csa) { /* Clear reserved bit before vfree. */ unsigned char *p; @@ -61,123 +61,3 @@ static void spu_free_lscsa_std(struct spu_state *csa) vfree(csa->lscsa); } - -#ifdef CONFIG_SPU_FS_64K_LS - -#define SPU_64K_PAGE_SHIFT 16 -#define SPU_64K_PAGE_ORDER (SPU_64K_PAGE_SHIFT - PAGE_SHIFT) -#define SPU_64K_PAGE_COUNT (1ul << SPU_64K_PAGE_ORDER) - -int spu_alloc_lscsa(struct spu_state *csa) -{ - struct page **pgarray; - unsigned char *p; - int i, j, n_4k; - - /* Check availability of 64K pages */ - if (!spu_64k_pages_available()) - goto fail; - - csa->use_big_pages = 1; - - pr_debug("spu_alloc_lscsa(csa=0x%p), trying to allocate 64K pages\n", - csa); - - /* First try to allocate our 64K pages. We need 5 of them - * with the current implementation. In the future, we should try - * to separate the lscsa with the actual local store image, thus - * allowing us to require only 4 64K pages per context - */ - for (i = 0; i < SPU_LSCSA_NUM_BIG_PAGES; i++) { - /* XXX This is likely to fail, we should use a special pool - * similar to what hugetlbfs does. - */ - csa->lscsa_pages[i] = alloc_pages(GFP_KERNEL, - SPU_64K_PAGE_ORDER); - if (csa->lscsa_pages[i] == NULL) - goto fail; - } - - pr_debug(" success ! creating vmap...\n"); - - /* Now we need to create a vmalloc mapping of these for the kernel - * and SPU context switch code to use. Currently, we stick to a - * normal kernel vmalloc mapping, which in our case will be 4K - */ - n_4k = SPU_64K_PAGE_COUNT * SPU_LSCSA_NUM_BIG_PAGES; - pgarray = kmalloc(sizeof(struct page *) * n_4k, GFP_KERNEL); - if (pgarray == NULL) - goto fail; - for (i = 0; i < SPU_LSCSA_NUM_BIG_PAGES; i++) - for (j = 0; j < SPU_64K_PAGE_COUNT; j++) - /* We assume all the struct page's are contiguous - * which should be hopefully the case for an order 4 - * allocation.. - */ - pgarray[i * SPU_64K_PAGE_COUNT + j] = - csa->lscsa_pages[i] + j; - csa->lscsa = vmap(pgarray, n_4k, VM_USERMAP, PAGE_KERNEL); - kfree(pgarray); - if (csa->lscsa == NULL) - goto fail; - - memset(csa->lscsa, 0, sizeof(struct spu_lscsa)); - - /* Set LS pages reserved to allow for user-space mapping. - * - * XXX isn't that a bit obsolete ? I think we should just - * make sure the page count is high enough. Anyway, won't harm - * for now - */ - for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE) - SetPageReserved(vmalloc_to_page(p)); - - pr_debug(" all good !\n"); - - return 0; -fail: - pr_debug("spufs: failed to allocate lscsa 64K pages, falling back\n"); - spu_free_lscsa(csa); - return spu_alloc_lscsa_std(csa); -} - -void spu_free_lscsa(struct spu_state *csa) -{ - unsigned char *p; - int i; - - if (!csa->use_big_pages) { - spu_free_lscsa_std(csa); - return; - } - csa->use_big_pages = 0; - - if (csa->lscsa == NULL) - goto free_pages; - - for (p = csa->lscsa->ls; p < csa->lscsa->ls + LS_SIZE; p += PAGE_SIZE) - ClearPageReserved(vmalloc_to_page(p)); - - vunmap(csa->lscsa); - csa->lscsa = NULL; - - free_pages: - - for (i = 0; i < SPU_LSCSA_NUM_BIG_PAGES; i++) - if (csa->lscsa_pages[i]) - __free_pages(csa->lscsa_pages[i], SPU_64K_PAGE_ORDER); -} - -#else /* CONFIG_SPU_FS_64K_LS */ - -int spu_alloc_lscsa(struct spu_state *csa) -{ - return spu_alloc_lscsa_std(csa); -} - -void spu_free_lscsa(struct spu_state *csa) -{ - spu_free_lscsa_std(csa); -} - -#endif /* !defined(CONFIG_SPU_FS_64K_LS) */ |