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author | David Woodhouse <David.Woodhouse@intel.com> | 2010-02-26 19:04:15 +0000 |
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committer | David Woodhouse <David.Woodhouse@intel.com> | 2010-02-26 19:06:24 +0000 |
commit | a7790532f5b7358c33a6b1834dc2b318de209f31 (patch) | |
tree | 0ceb9e24b3f54cb5c8453fb5a218e2a94a0f1cce /drivers/gpu/drm/ttm/ttm_tt.c | |
parent | 2764fb4244cc1bc08df3667924ca4a972e90ac70 (diff) | |
parent | 60b341b778cc2929df16c0a504c91621b3c6a4ad (diff) | |
download | kernel_samsung_smdk4412-a7790532f5b7358c33a6b1834dc2b318de209f31.zip kernel_samsung_smdk4412-a7790532f5b7358c33a6b1834dc2b318de209f31.tar.gz kernel_samsung_smdk4412-a7790532f5b7358c33a6b1834dc2b318de209f31.tar.bz2 |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
The SmartMedia FTL code depends on new kfifo bits from 2.6.33
Diffstat (limited to 'drivers/gpu/drm/ttm/ttm_tt.c')
-rw-r--r-- | drivers/gpu/drm/ttm/ttm_tt.c | 35 |
1 files changed, 24 insertions, 11 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index 9c2b1cc..3d47a2c 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -196,23 +196,34 @@ EXPORT_SYMBOL(ttm_tt_populate); #ifdef CONFIG_X86 static inline int ttm_tt_set_page_caching(struct page *p, - enum ttm_caching_state c_state) + enum ttm_caching_state c_old, + enum ttm_caching_state c_new) { + int ret = 0; + if (PageHighMem(p)) return 0; - switch (c_state) { - case tt_cached: - return set_pages_wb(p, 1); - case tt_wc: - return set_memory_wc((unsigned long) page_address(p), 1); - default: - return set_pages_uc(p, 1); + if (c_old != tt_cached) { + /* p isn't in the default caching state, set it to + * writeback first to free its current memtype. */ + + ret = set_pages_wb(p, 1); + if (ret) + return ret; } + + if (c_new == tt_wc) + ret = set_memory_wc((unsigned long) page_address(p), 1); + else if (c_new == tt_uncached) + ret = set_pages_uc(p, 1); + + return ret; } #else /* CONFIG_X86 */ static inline int ttm_tt_set_page_caching(struct page *p, - enum ttm_caching_state c_state) + enum ttm_caching_state c_old, + enum ttm_caching_state c_new) { return 0; } @@ -245,7 +256,9 @@ static int ttm_tt_set_caching(struct ttm_tt *ttm, for (i = 0; i < ttm->num_pages; ++i) { cur_page = ttm->pages[i]; if (likely(cur_page != NULL)) { - ret = ttm_tt_set_page_caching(cur_page, c_state); + ret = ttm_tt_set_page_caching(cur_page, + ttm->caching_state, + c_state); if (unlikely(ret != 0)) goto out_err; } @@ -259,7 +272,7 @@ out_err: for (j = 0; j < i; ++j) { cur_page = ttm->pages[j]; if (likely(cur_page != NULL)) { - (void)ttm_tt_set_page_caching(cur_page, + (void)ttm_tt_set_page_caching(cur_page, c_state, ttm->caching_state); } } |