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Rev | Author | Line No. | Line |
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3260 | Serge | 1 | #include |
2 | #include |
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3 | #include "i915_drv.h" |
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4 | #include "intel_drv.h" |
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5 | |||
6 | |||
7 | struct file *shmem_file_setup(const char *name, loff_t size, unsigned long flags) |
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8 | { |
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9 | struct file *filep; |
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10 | int count; |
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11 | |||
12 | filep = malloc(sizeof(*filep)); |
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13 | |||
14 | if(unlikely(filep == NULL)) |
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15 | return ERR_PTR(-ENOMEM); |
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16 | |||
17 | count = size / PAGE_SIZE; |
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18 | |||
19 | filep->pages = kzalloc(sizeof(struct page *) * count, 0); |
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20 | if(unlikely(filep->pages == NULL)) |
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21 | { |
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22 | kfree(filep); |
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23 | return ERR_PTR(-ENOMEM); |
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24 | }; |
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25 | |||
26 | filep->count = count; |
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27 | filep->allocated = 0; |
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28 | filep->vma = NULL; |
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29 | |||
30 | // dbgprintf("%s file %p pages %p count %d\n", |
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31 | // __FUNCTION__,filep, filep->pages, filep->pages); |
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32 | |||
33 | return filep; |
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34 | } |
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35 | |||
36 | struct page *shmem_read_mapping_page_gfp(struct file *filep, |
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37 | pgoff_t index, gfp_t gfp) |
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38 | { |
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39 | struct page *page; |
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40 | |||
41 | // dbgprintf("%s, file %p index %d\n", __FUNCTION__, filep, index); |
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42 | |||
43 | if(unlikely(index >= filep->count)) |
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44 | return ERR_PTR(-EINVAL); |
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45 | |||
46 | page = filep->pages[index]; |
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47 | |||
48 | if(unlikely(page == NULL)) |
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49 | { |
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50 | page = (struct page *)AllocPage(); |
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51 | |||
52 | if(unlikely(page == NULL)) |
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53 | return ERR_PTR(-ENOMEM); |
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54 | |||
55 | filep->pages[index] = page; |
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56 | }; |
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57 | |||
58 | return page; |
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59 | }; |