207 static int sg_build_indi(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size);
208 static int sg_build_sgat(Sg_scatter_hold * schp, const Sg_fd * sfp,
221 static void sg_remove_scat(Sg_scatter_hold * schp);
222 static char * sg_get_sgat_msa(Sg_scatter_hold * schp);
243 static void sg_unmap_and(Sg_scatter_hold * schp, int free_also);
1630 static int sg_build_sgat(Sg_scatter_hold * schp, const Sg_fd * sfp,  in sg_build_sgat()  argument
1640     schp->buffer = sg_malloc(sfp, sg_bufflen, &ret_sz, &mem_src);  in sg_build_sgat()
1641     if (! schp->buffer)  in sg_build_sgat()
1647     schp->buffer_mem_src = (char)mem_src;  in sg_build_sgat()
1648     schp->sglist_len = sg_bufflen;  in sg_build_sgat()
1649     memset(schp->buffer, 0, sg_bufflen);  in sg_build_sgat()
1671 static void sg_unmap_and(Sg_scatter_hold * schp, int free_also)  in sg_unmap_and()  argument
1676     if (schp && schp->kiobp) {  in sg_unmap_and()
1677 	if (schp->mapped) {  in sg_unmap_and()
1678 	    unmap_kiobuf(schp->kiobp);  in sg_unmap_and()
1679 	    schp->mapped = 0;  in sg_unmap_and()
1682 	    sg_free_kiovec(1, &schp->kiobp, &nbhs);  in sg_unmap_and()
1683 	    schp->kiobp = NULL;  in sg_unmap_and()
1698     Sg_scatter_hold * schp = &srp->data;  in sg_build_dir()  local
1702     res = sg_alloc_kiovec(1, &schp->kiobp, &nbhs);  in sg_build_dir()
1709 			  schp->kiobp, (unsigned long)hp->dxferp, dxfer_len);  in sg_build_dir()
1713 	sg_unmap_and(schp, 1);  in sg_build_dir()
1716     schp->mapped = 1;  in sg_build_dir()
1717     kp = schp->kiobp;  in sg_build_dir()
1727 	schp->k_use_sg = 0;  in sg_build_dir()
1728 	schp->buffer = page_address(kp->maplist[0]) + kp->offset;  in sg_build_dir()
1729 	schp->bufflen = dxfer_len;  in sg_build_dir()
1730 	schp->buffer_mem_src = SG_USER_MEM;  in sg_build_dir()
1731 	schp->b_malloc_len = dxfer_len;  in sg_build_dir()
1735     mx_sc_elems = sg_build_sgat(schp, sfp, sg_tablesize);  in sg_build_dir()
1737 	sg_unmap_and(schp, 1);  in sg_build_dir()
1738 	sg_remove_scat(schp);  in sg_build_dir()
1741     mem_src_arr = schp->buffer + (mx_sc_elems * sizeof(struct scatterlist));  in sg_build_dir()
1742     for (k = 0, sclp = schp->buffer, rem_sz = dxfer_len;  in sg_build_dir()
1759     schp->k_use_sg = k;  in sg_build_dir()
1762     schp->bufflen = dxfer_len;  in sg_build_dir()
1764 	sg_unmap_and(schp, 1);  in sg_build_dir()
1765 	sg_remove_scat(schp);  in sg_build_dir()
1775 static int sg_build_indi(Sg_scatter_hold * schp, Sg_fd * sfp, int buff_size)  in sg_build_indi()  argument
1795 	    schp->k_use_sg = 0;  in sg_build_indi()
1796             schp->buffer = p;  in sg_build_indi()
1797             schp->bufflen = blk_size;  in sg_build_indi()
1798 	    schp->buffer_mem_src = (char)mem_src;  in sg_build_indi()
1799             schp->b_malloc_len = blk_size;  in sg_build_indi()
1819 	mx_sc_elems = sg_build_sgat(schp, sfp, sg_tablesize);  in sg_build_indi()
1822 	mem_src_arr = schp->buffer +  in sg_build_indi()
1825 	for (k = 0, sclp = schp->buffer, rem_sz = blk_size;  in sg_build_indi()
1848 	schp->k_use_sg = k;  in sg_build_indi()
1851         schp->bufflen = blk_size;  in sg_build_indi()
1861     Sg_scatter_hold * schp = &srp->data;  in sg_write_xfer()  local
1873 	if (schp->bufflen < num_xfer)  in sg_write_xfer()
1874 	    num_xfer = schp->bufflen;  in sg_write_xfer()
1882 		num_xfer, iovec_count, schp->k_use_sg));  in sg_write_xfer()
1892     if (0 == schp->k_use_sg) {  /* kernel has single buffer */  in sg_write_xfer()
1893 	if (SG_USER_MEM != schp->buffer_mem_src) { /* else nothing to do */  in sg_write_xfer()
1895 	    for (j = 0, p = schp->buffer; j < onum; ++j) {  in sg_write_xfer()
1908 	struct scatterlist * sclp = (struct scatterlist *)schp->buffer;  in sg_write_xfer()
1909 	char * mem_src_arr = sg_get_sgat_msa(schp);  in sg_write_xfer()
1941                 if (k >= schp->k_use_sg)  in sg_write_xfer()
1978 static char * sg_get_sgat_msa(Sg_scatter_hold * schp)  in sg_get_sgat_msa()  argument
1981     int mx_sc_elems = schp->sglist_len / elem_sz;  in sg_get_sgat_msa()
1982     return schp->buffer + (sizeof(struct scatterlist) * mx_sc_elems);  in sg_get_sgat_msa()
1985 static void sg_remove_scat(Sg_scatter_hold * schp)  in sg_remove_scat()  argument
1988 			       schp->k_use_sg));  in sg_remove_scat()
1989     if (schp->buffer && schp->sglist_len) {  in sg_remove_scat()
1991         struct scatterlist * sclp = (struct scatterlist *)schp->buffer;  in sg_remove_scat()
1992 	char * mem_src_arr = sg_get_sgat_msa(schp);  in sg_remove_scat()
1994 	for (k = 0; (k < schp->k_use_sg) && sclp->address; ++k, ++sclp) {  in sg_remove_scat()
2006 	sg_free(schp->buffer, schp->sglist_len, schp->buffer_mem_src);  in sg_remove_scat()
2008     else if (schp->buffer)  in sg_remove_scat()
2009 	sg_free(schp->buffer, schp->b_malloc_len, schp->buffer_mem_src);  in sg_remove_scat()
2010     memset(schp, 0, sizeof(*schp));  in sg_remove_scat()
2016     Sg_scatter_hold * schp = &srp->data;  in sg_read_xfer()  local
2028 	if (schp->bufflen < num_xfer)  in sg_read_xfer()
2029 	    num_xfer = schp->bufflen;  in sg_read_xfer()
2037 		num_xfer, iovec_count, schp->k_use_sg));  in sg_read_xfer()
2047     if (0 == schp->k_use_sg) {  /* kernel has single buffer */  in sg_read_xfer()
2048 	if (SG_USER_MEM != schp->buffer_mem_src) { /* else nothing to do */  in sg_read_xfer()
2050 	    for (j = 0, p = schp->buffer; j < onum; ++j) {  in sg_read_xfer()
2063 	struct scatterlist * sclp = (struct scatterlist *)schp->buffer;  in sg_read_xfer()
2064 	char * mem_src_arr = sg_get_sgat_msa(schp);  in sg_read_xfer()
2096                 if (k >= schp->k_use_sg)  in sg_read_xfer()
2106     Sg_scatter_hold * schp = &srp->data;  in sg_read_oxfer()  local
2112     if(schp->k_use_sg > 0) {  in sg_read_oxfer()
2114         struct scatterlist * sclp = (struct scatterlist *)schp->buffer;  in sg_read_oxfer()
2116 	for (k = 0; (k < schp->k_use_sg) && sclp->address; ++k, ++sclp) {  in sg_read_oxfer()
2132         __copy_to_user(outp, schp->buffer, num_read_xfer);  in sg_read_oxfer()
2137     Sg_scatter_hold * schp = &sfp->reserve;  in sg_build_reserve()  local
2143 	if (0 == sg_build_indi(schp, sfp, req_size))  in sg_build_reserve()
2146             sg_remove_scat(schp);  in sg_build_reserve()