static int dlpar_memory_remove_by_index(u32 drc_index, struct property *prop)
{
struct of_drconf_cell *lmbs;
u32 num_lmbs, *p;
int lmb_found;
int i, rc;
pr_info("Attempting to hot-remove LMB, drc index %x\n", drc_index);
p = prop->value;
num_lmbs = *p++;
lmbs = (struct of_drconf_cell *)p;
lmb_found = 0;
for (i = 0; i < num_lmbs; i++) {
if (lmbs[i].drc_index == drc_index) {
lmb_found = 1;
rc = dlpar_remove_lmb(&lmbs[i]);
break;
}
}
if (!lmb_found)
rc = -EINVAL;
if (rc)
pr_info("Failed to hot-remove memory at %llx\n",
lmbs[i].base_addr);
else
pr_info("Memory at %llx was hot-removed\n", lmbs[i].base_addr);
return rc;
}
static int dlpar_memory_add_by_ic(u32 lmbs_to_add, u32 drc_index,
struct property *prop)
{
struct of_drconf_cell *lmbs;
u32 num_lmbs, *p;
int i, rc, start_lmb_found;
int lmbs_available = 0, start_index = 0, end_index;
pr_info("Attempting to hot-add %u LMB(s) at index %x\n",
lmbs_to_add, drc_index);
if (lmbs_to_add == 0)
return -EINVAL;
p = prop->value;
num_lmbs = *p++;
lmbs = (struct of_drconf_cell *)p;
start_lmb_found = 0;
/* Navigate to drc_index */
while (start_index < num_lmbs) {
if (lmbs[start_index].drc_index == drc_index) {
start_lmb_found = 1;
break;
}
start_index++;
}
if (!start_lmb_found)
return -EINVAL;
end_index = start_index + lmbs_to_add;
/* Validate that the LMBs in this range are not reserved */
for (i = start_index; i < end_index; i++) {
if (lmbs[i].flags & DRCONF_MEM_RESERVED)
break;
lmbs_available++;
}
if (lmbs_available < lmbs_to_add)
return -EINVAL;
for (i = start_index; i < end_index; i++) {
if (lmbs[i].flags & DRCONF_MEM_ASSIGNED)
continue;
rc = dlpar_acquire_drc(lmbs[i].drc_index);
if (rc)
break;
rc = dlpar_add_lmb(&lmbs[i]);
if (rc) {
dlpar_release_drc(lmbs[i].drc_index);
break;
}
lmbs[i].reserved = 1;
}
if (rc) {
pr_err("Memory indexed-count-add failed, removing any added LMBs\n");
for (i = start_index; i < end_index; i++) {
if (!lmbs[i].reserved)
continue;
rc = dlpar_remove_lmb(&lmbs[i]);
if (rc)
pr_err("Failed to remove LMB, drc index %x\n",
be32_to_cpu(lmbs[i].drc_index));
else
dlpar_release_drc(lmbs[i].drc_index);
}
rc = -EINVAL;
} else {
for (i = start_index; i < end_index; i++) {
if (!lmbs[i].reserved)
continue;
pr_info("Memory at %llx (drc index %x) was hot-added\n",
lmbs[i].base_addr, lmbs[i].drc_index);
lmbs[i].reserved = 0;
}
}
return rc;
}
static int dlpar_memory_add_by_count(u32 lmbs_to_add, struct property *prop)
{
struct of_drconf_cell *lmbs;
u32 num_lmbs, *p;
int lmbs_available = 0;
int lmbs_added = 0;
int i, rc;
pr_info("Attempting to hot-add %d LMB(s)\n", lmbs_to_add);
if (lmbs_to_add == 0)
return -EINVAL;
p = prop->value;
num_lmbs = *p++;
lmbs = (struct of_drconf_cell *)p;
/* Validate that there are enough LMBs to satisfy the request */
for (i = 0; i < num_lmbs; i++) {
if (!(lmbs[i].flags & DRCONF_MEM_ASSIGNED))
lmbs_available++;
}
if (lmbs_available < lmbs_to_add)
return -EINVAL;
for (i = 0; i < num_lmbs && lmbs_to_add != lmbs_added; i++) {
rc = dlpar_acquire_drc(lmbs[i].drc_index);
if (rc)
continue;
rc = dlpar_add_lmb(&lmbs[i]);
if (rc) {
dlpar_release_drc(lmbs[i].drc_index);
continue;
}
lmbs_added++;
/* Mark this lmb so we can remove it later if all of the
* requested LMBs cannot be added.
*/
lmbs[i].reserved = 1;
}
if (lmbs_added != lmbs_to_add) {
pr_err("Memory hot-add failed, removing any added LMBs\n");
for (i = 0; i < num_lmbs; i++) {
if (!lmbs[i].reserved)
continue;
rc = dlpar_remove_lmb(&lmbs[i]);
if (rc)
pr_err("Failed to remove LMB, drc index %x\n",
be32_to_cpu(lmbs[i].drc_index));
else
dlpar_release_drc(lmbs[i].drc_index);
}
rc = -EINVAL;
} else {
for (i = 0; i < num_lmbs; i++) {
if (!lmbs[i].reserved)
continue;
pr_info("Memory at %llx (drc index %x) was hot-added\n",
lmbs[i].base_addr, lmbs[i].drc_index);
lmbs[i].reserved = 0;
}
}
return rc;
}
static int dlpar_memory_remove_by_count(u32 lmbs_to_remove,
struct property *prop)
{
struct of_drconf_cell *lmbs;
int lmbs_removed = 0;
int lmbs_available = 0;
u32 num_lmbs, *p;
int i, rc;
pr_info("Attempting to hot-remove %d LMB(s)\n", lmbs_to_remove);
if (lmbs_to_remove == 0)
return -EINVAL;
p = prop->value;
num_lmbs = *p++;
lmbs = (struct of_drconf_cell *)p;
/* Validate that there are enough LMBs to satisfy the request */
for (i = 0; i < num_lmbs; i++) {
if (lmb_is_removable(&lmbs[i]))
lmbs_available++;
}
if (lmbs_available < lmbs_to_remove) {
pr_info("Not enough LMBs available (%d of %d) to satisfy request\n",
lmbs_available, lmbs_to_remove);
return -EINVAL;
}
for (i = 0; i < num_lmbs && lmbs_removed < lmbs_to_remove; i++) {
rc = dlpar_remove_lmb(&lmbs[i]);
if (rc)
continue;
lmbs_removed++;
/* Mark this lmb so we can add it later if all of the
* requested LMBs cannot be removed.
*/
lmbs[i].reserved = 1;
}
if (lmbs_removed != lmbs_to_remove) {
pr_err("Memory hot-remove failed, adding LMB's back\n");
for (i = 0; i < num_lmbs; i++) {
if (!lmbs[i].reserved)
continue;
rc = dlpar_add_lmb(&lmbs[i]);
if (rc)
pr_err("Failed to add LMB back, drc index %x\n",
lmbs[i].drc_index);
lmbs[i].reserved = 0;
}
rc = -EINVAL;
} else {
for (i = 0; i < num_lmbs; i++) {
if (!lmbs[i].reserved)
continue;
dlpar_release_drc(lmbs[i].drc_index);
pr_info("Memory at %llx was hot-removed\n",
lmbs[i].base_addr);
lmbs[i].reserved = 0;
}
rc = 0;
}
return rc;
}