drivers/crypto/cavium/zip/zip_mem.c

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  45
  46 #include <linux/types.h>
  47 #include <linux/vmalloc.h>
  48
  49 #include "common.h"
  50
  51 /**
  52  * zip_cmd_qbuf_alloc - Allocates a cmd buffer for ZIP Instruction Queue
  53  * @zip: Pointer to zip device structure
  54  * @q:   Queue number to allocate bufffer to
  55  * Return: 0 if successful, -ENOMEM otherwise
  56  */
  57 int zip_cmd_qbuf_alloc(struct zip_device *zip, int q)
  58 {
  59         zip->iq[q].sw_head = (u64 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
  60                                                 get_order(ZIP_CMD_QBUF_SIZE));
  61
  62         if (!zip->iq[q].sw_head)
  63                 return -ENOMEM;
  64
  65         memset(zip->iq[q].sw_head, 0, ZIP_CMD_QBUF_SIZE);
  66
  67         zip_dbg("cmd_qbuf_alloc[%d] Success : %p\n", q, zip->iq[q].sw_head);
  68         return 0;
  69 }
  70
  71 /**
  72  * zip_cmd_qbuf_free - Frees the cmd Queue buffer
  73  * @zip: Pointer to zip device structure
  74  * @q:   Queue number to free buffer of
  75  */
  76 void zip_cmd_qbuf_free(struct zip_device *zip, int q)
  77 {
  78         zip_dbg("Freeing cmd_qbuf 0x%lx\n", zip->iq[q].sw_tail);
  79
  80         free_pages((u64)zip->iq[q].sw_tail, get_order(ZIP_CMD_QBUF_SIZE));
  81 }
  82
  83 /**
  84  * zip_data_buf_alloc - Allocates memory for a data bufffer
  85  * @size:   Size of the buffer to allocate
  86  * Returns: Pointer to the buffer allocated
  87  */
  88 u8 *zip_data_buf_alloc(u64 size)
  89 {
  90         u8 *ptr;
  91
  92         ptr = (u8 *)__get_free_pages((GFP_KERNEL | GFP_DMA),
  93                                         get_order(size));
  94
  95         if (!ptr)
  96                 return NULL;
  97
  98         memset(ptr, 0, size);
  99
 100         zip_dbg("Data buffer allocation success\n");
 101         return ptr;
 102 }
 103
 104 /**
 105  * zip_data_buf_free - Frees the memory of a data buffer
 106  * @ptr:  Pointer to the buffer
 107  * @size: Buffer size
 108  */
 109 void zip_data_buf_free(u8 *ptr, u64 size)
 110 {
 111         zip_dbg("Freeing data buffer 0x%lx\n", ptr);
 112
 113         free_pages((u64)ptr, get_order(size));
 114 }