/*
* Given a nasid, get the physical address of the partition's reserved page
* for that nasid. This function returns 0 on any error.
*/
static u64
xpc_get_rsvd_page_pa(int nasid)
{
bte_result_t bte_res;
s64 status;
u64 cookie = 0;
u64 rp_pa = nasid; /* seed with nasid */
u64 len = 0;
u64 buf = buf;
u64 buf_len = 0;
void *buf_base = NULL;
while (1) {
status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
&len);
dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
"0x%016lx, address=0x%016lx, len=0x%016lx\n",
status, cookie, rp_pa, len);
if (status != SALRET_MORE_PASSES) {
break;
}
if (L1_CACHE_ALIGN(len) > buf_len) {
if (buf_base != NULL) {
kfree(buf_base);
}
buf_len = L1_CACHE_ALIGN(len);
buf = (u64) xpc_kmalloc_cacheline_aligned(buf_len,
GFP_KERNEL, &buf_base);
if (buf_base == NULL) {
dev_err(xpc_part, "unable to kmalloc "
"len=0x%016lx\n", buf_len);
status = SALRET_ERROR;
break;
}
}
bte_res = xp_bte_copy(rp_pa, ia64_tpa(buf), buf_len,
(BTE_NOTIFY | BTE_WACQUIRE), NULL);
if (bte_res != BTE_SUCCESS) {
dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
status = SALRET_ERROR;
break;
}
}
if (buf_base != NULL) {
kfree(buf_base);
}
if (status != SALRET_OK) {
rp_pa = 0;
}
dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
return rp_pa;
}
static enum xp_retval
xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa,
size_t *len)
{
s64 status;
enum xp_retval ret;
#if defined CONFIG_X86_64
status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa,
(u64 *)len);
if (status == BIOS_STATUS_SUCCESS)
ret = xpSuccess;
else if (status == BIOS_STATUS_MORE_PASSES)
ret = xpNeedMoreInfo;
else
ret = xpBiosError;
#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len);
if (status == SALRET_OK)
ret = xpSuccess;
else if (status == SALRET_MORE_PASSES)
ret = xpNeedMoreInfo;
else
ret = xpSalError;
#else
#error not a supported configuration
#endif
return ret;
}
/*
* Given a nasid, get the physical address of the partition's reserved page
* for that nasid. This function returns 0 on any error.
*/
static u64
xpc_get_rsvd_page_pa(int nasid, u64 buf, u64 buf_size)
{
bte_result_t bte_res;
s64 status;
u64 cookie = 0;
u64 rp_pa = nasid; /* seed with nasid */
u64 len = 0;
while (1) {
status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
&len);
dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
"0x%016lx, address=0x%016lx, len=0x%016lx\n",
status, cookie, rp_pa, len);
if (status != SALRET_MORE_PASSES) {
break;
}
if (len > buf_size) {
dev_err(xpc_part, "len (=0x%016lx) > buf_size\n", len);
status = SALRET_ERROR;
break;
}
bte_res = xp_bte_copy(rp_pa, ia64_tpa(buf), buf_size,
(BTE_NOTIFY | BTE_WACQUIRE), NULL);
if (bte_res != BTE_SUCCESS) {
dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
status = SALRET_ERROR;
break;
}
}
if (status != SALRET_OK) {
rp_pa = 0;
}
dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
return rp_pa;
}