forked from Minki/linux
powerpc/powernv: Move SG list structure to header file
Move SG list and entry structure to header file so that it can be used in other places as well. Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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7e1ce5a492
@ -33,6 +33,28 @@ struct opal_takeover_args {
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u64 rd_loc; /* r11 */
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};
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/*
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* SG entry
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*
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* WARNING: The current implementation requires each entry
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* to represent a block that is 4k aligned *and* each block
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* size except the last one in the list to be as well.
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*/
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struct opal_sg_entry {
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void *data;
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long length;
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};
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/* sg list */
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struct opal_sg_list {
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unsigned long num_entries;
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struct opal_sg_list *next;
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struct opal_sg_entry entry[];
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};
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/* We calculate number of sg entries based on PAGE_SIZE */
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#define SG_ENTRIES_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct opal_sg_entry))
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extern long opal_query_takeover(u64 *hal_size, u64 *hal_align);
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extern long opal_do_takeover(struct opal_takeover_args *args);
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@ -103,27 +103,6 @@ struct image_header_t {
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uint32_t size;
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};
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/* Scatter/gather entry */
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struct opal_sg_entry {
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void *data;
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long length;
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};
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/* We calculate number of entries based on PAGE_SIZE */
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#define SG_ENTRIES_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct opal_sg_entry))
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/*
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* This struct is very similar but not identical to that
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* needed by the opal flash update. All we need to do for
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* opal is rewrite num_entries into a version/length and
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* translate the pointers to absolute.
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*/
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struct opal_sg_list {
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unsigned long num_entries;
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struct opal_sg_list *next;
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struct opal_sg_entry entry[SG_ENTRIES_PER_NODE];
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};
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struct validate_flash_t {
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int status; /* Return status */
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void *buf; /* Candiate image buffer */
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@ -333,7 +312,7 @@ static struct opal_sg_list *image_data_to_sglist(void)
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addr = image_data.data;
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size = image_data.size;
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sg1 = kzalloc((sizeof(struct opal_sg_list)), GFP_KERNEL);
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sg1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
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if (!sg1)
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return NULL;
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@ -351,8 +330,7 @@ static struct opal_sg_list *image_data_to_sglist(void)
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sg1->num_entries++;
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if (sg1->num_entries >= SG_ENTRIES_PER_NODE) {
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sg1->next = kzalloc((sizeof(struct opal_sg_list)),
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GFP_KERNEL);
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sg1->next = kzalloc(PAGE_SIZE, GFP_KERNEL);
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if (!sg1->next) {
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pr_err("%s : Failed to allocate memory\n",
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__func__);
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@ -402,7 +380,10 @@ static int opal_flash_update(int op)
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else
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sg->next = NULL;
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/* Make num_entries into the version/length field */
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/*
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* Convert num_entries to version/length format
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* to satisfy OPAL.
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*/
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sg->num_entries = (SG_LIST_VERSION << 56) |
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(sg->num_entries * sizeof(struct opal_sg_entry) + 16);
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}
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