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16 * General Public License for more details.
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20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 * The full GNU General Public License is included in this distribution
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56 #include <linux/kernel.h>
58 #include "sci_environment.h"
61 void *scic_request_get_virt_addr(struct scic_sds_request
*sci_req
, dma_addr_t phys_addr
)
63 struct isci_request
*ireq
= sci_req_to_ireq(sci_req
);
66 BUG_ON(phys_addr
< ireq
->request_daddr
);
68 offset
= phys_addr
- ireq
->request_daddr
;
70 BUG_ON(offset
>= sizeof(*ireq
));
72 return (char *)ireq
+ offset
;
75 dma_addr_t
scic_io_request_get_dma_addr(struct scic_sds_request
*sds_request
,
78 struct isci_request
*isci_request
= sci_req_to_ireq(sds_request
);
80 char *requested_addr
= (char *)virt_addr
;
81 char *base_addr
= (char *)isci_request
;
83 BUG_ON(requested_addr
< base_addr
);
84 BUG_ON((requested_addr
- base_addr
) >= sizeof(*isci_request
));
86 return isci_request
->request_daddr
+ (requested_addr
- base_addr
);
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