static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt,
struct persistent_ram_zone **prz,
phys_addr_t *paddr, size_t sz, u32 sig)
{
if (!sz)
return 0;
if (*paddr + sz - cxt->phys_addr > cxt->size) {
dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
sz, (unsigned long long)*paddr,
cxt->size, (unsigned long long)cxt->phys_addr);
return -ENOMEM;
}
*prz = persistent_ram_new(*paddr, sz, sig, &cxt->ecc_info, cxt->memtype);
if (IS_ERR(*prz)) {
int err = PTR_ERR(*prz);
dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
sz, (unsigned long long)*paddr, err);
return err;
}
persistent_ram_zap(*prz);
*paddr += sz;
return 0;
}
static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt,
phys_addr_t *paddr, size_t dump_mem_sz)
{
int err = -ENOMEM;
int i;
if (!cxt->record_size)
return 0;
if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) {
dev_err(dev, "no room for dumps\n");
return -ENOMEM;
}
cxt->max_dump_cnt = dump_mem_sz / cxt->record_size;
if (!cxt->max_dump_cnt)
return -ENOMEM;
cxt->przs = kzalloc(sizeof(*cxt->przs) * cxt->max_dump_cnt,
GFP_KERNEL);
if (!cxt->przs) {
dev_err(dev, "failed to initialize a prz array for dumps\n");
goto fail_mem;
}
for (i = 0; i < cxt->max_dump_cnt; i++) {
cxt->przs[i] = persistent_ram_new(*paddr, cxt->record_size, 0,
&cxt->ecc_info,
cxt->memtype);
if (IS_ERR(cxt->przs[i])) {
err = PTR_ERR(cxt->przs[i]);
dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
cxt->record_size, (unsigned long long)*paddr, err);
while (i > 0) {
i--;
persistent_ram_free(cxt->przs[i]);
}
goto fail_prz;
}
*paddr += cxt->record_size;
}
return 0;
fail_prz:
kfree(cxt->przs);
fail_mem:
cxt->max_dump_cnt = 0;
return err;
}
static int ramoops_init_przs(const char *name,
struct device *dev, struct ramoops_context *cxt,
struct persistent_ram_zone ***przs,
phys_addr_t *paddr, size_t mem_sz,
ssize_t record_size,
unsigned int *cnt, u32 sig, u32 flags)
{
int err = -ENOMEM;
int i;
size_t zone_sz;
struct persistent_ram_zone **prz_ar;
/* Allocate nothing for 0 mem_sz or 0 record_size. */
if (mem_sz == 0 || record_size == 0) {
*cnt = 0;
return 0;
}
/*
* If we have a negative record size, calculate it based on
* mem_sz / *cnt. If we have a positive record size, calculate
* cnt from mem_sz / record_size.
*/
if (record_size < 0) {
if (*cnt == 0)
return 0;
record_size = mem_sz / *cnt;
if (record_size == 0) {
dev_err(dev, "%s record size == 0 (%zu / %u)\n",
name, mem_sz, *cnt);
goto fail;
}
} else {
*cnt = mem_sz / record_size;
if (*cnt == 0) {
dev_err(dev, "%s record count == 0 (%zu / %zu)\n",
name, mem_sz, record_size);
goto fail;
}
}
if (*paddr + mem_sz - cxt->phys_addr > cxt->size) {
dev_err(dev, "no room for %s mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n",
name,
mem_sz, (unsigned long long)*paddr,
cxt->size, (unsigned long long)cxt->phys_addr);
goto fail;
}
zone_sz = mem_sz / *cnt;
if (!zone_sz) {
dev_err(dev, "%s zone size == 0\n", name);
goto fail;
}
prz_ar = kcalloc(*cnt, sizeof(**przs), GFP_KERNEL);
if (!prz_ar)
goto fail;
for (i = 0; i < *cnt; i++) {
prz_ar[i] = persistent_ram_new(*paddr, zone_sz, sig,
&cxt->ecc_info,
cxt->memtype, flags);
if (IS_ERR(prz_ar[i])) {
err = PTR_ERR(prz_ar[i]);
dev_err(dev, "failed to request %s mem region (0x%zx@0x%llx): %d\n",
name, record_size,
(unsigned long long)*paddr, err);
while (i > 0) {
i--;
persistent_ram_free(prz_ar[i]);
}
kfree(prz_ar);
goto fail;
}
*paddr += zone_sz;
}
*przs = prz_ar;
return 0;
fail:
*cnt = 0;
return err;
}