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#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/semaphore.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <asm/rtas.h>
#include "cxl.h"
#include "hcalls.h"
#define DOWNLOAD_IMAGE 1
#define VALIDATE_IMAGE 2
struct ai_header {
u16 version;
u8 reserved0[6];
u16 vendor;
u16 device;
u16 subsystem_vendor;
u16 subsystem;
u64 image_offset;
u64 image_length;
u8 reserved1[96];
};
static struct semaphore sem;
static unsigned long *buffer[CXL_AI_MAX_ENTRIES];
static struct sg_list *le;
static u64 continue_token;
static unsigned int transfer;
struct update_props_workarea {
__be32 phandle;
__be32 state;
__be64 reserved;
__be32 nprops;
} __packed;
struct update_nodes_workarea {
__be32 state;
__be64 unit_address;
__be32 reserved;
} __packed;
#define DEVICE_SCOPE 3
#define NODE_ACTION_MASK 0xff000000
#define NODE_COUNT_MASK 0x00ffffff
#define OPCODE_DELETE 0x01000000
#define OPCODE_UPDATE 0x02000000
#define OPCODE_ADD 0x03000000
static int rcall(int token, char *buf, s32 scope)
{
int rc;
spin_lock(&rtas_data_buf_lock);
memcpy(rtas_data_buf, buf, RTAS_DATA_BUF_SIZE);
rc = rtas_call(token, 2, 1, NULL, rtas_data_buf, scope);
memcpy(buf, rtas_data_buf, RTAS_DATA_BUF_SIZE);
spin_unlock(&rtas_data_buf_lock);
return rc;
}
static int update_property(struct device_node *dn, const char *name,
u32 vd, char *value)
{
struct property *new_prop;
u32 *val;
int rc;
new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
if (!new_prop)
return -ENOMEM;
new_prop->name = kstrdup(name, GFP_KERNEL);
if (!new_prop->name) {
kfree(new_prop);
return -ENOMEM;
}
new_prop->length = vd;
new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);
if (!new_prop->value) {
kfree(new_prop->name);
kfree(new_prop);
return -ENOMEM;
}
memcpy(new_prop->value, value, vd);
val = (u32 *)new_prop->value;
rc = cxl_update_properties(dn, new_prop);
pr_devel("%s: update property (%s, length: %i, value: %#x)\n",
dn->name, name, vd, be32_to_cpu(*val));
if (rc) {
kfree(new_prop->name);
kfree(new_prop->value);
kfree(new_prop);
}
return rc;
}
static int update_node(__be32 phandle, s32 scope)
{
struct update_props_workarea *upwa;
struct device_node *dn;
int i, rc, ret;
char *prop_data;
char *buf;
int token;
u32 nprops;
u32 vd;
token = rtas_token("ibm,update-properties");
if (token == RTAS_UNKNOWN_SERVICE)
return -EINVAL;
buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
dn = of_find_node_by_phandle(be32_to_cpu(phandle));
if (!dn) {
kfree(buf);
return -ENOENT;
}
upwa = (struct update_props_workarea *)&buf[0];
upwa->phandle = phandle;
do {
rc = rcall(token, buf, scope);
if (rc < 0)
break;
prop_data = buf + sizeof(*upwa);
nprops = be32_to_cpu(upwa->nprops);
if (*prop_data == 0) {
prop_data++;
vd = be32_to_cpu(*(__be32 *)prop_data);
prop_data += vd + sizeof(vd);
nprops--;
}
for (i = 0; i < nprops; i++) {
char *prop_name;
prop_name = prop_data;
prop_data += strlen(prop_name) + 1;
vd = be32_to_cpu(*(__be32 *)prop_data);
prop_data += sizeof(vd);
if ((vd != 0x00000000) && (vd != 0x80000000)) {
ret = update_property(dn, prop_name, vd,
prop_data);
if (ret)
pr_err("cxl: Could not update property %s - %i\n",
prop_name, ret);
prop_data += vd;
}
}
} while (rc == 1);
of_node_put(dn);
kfree(buf);
return rc;
}
static int update_devicetree(struct cxl *adapter, s32 scope)
{
struct update_nodes_workarea *unwa;
u32 action, node_count;
int token, rc, i;
__be32 *data, drc_index, phandle;
char *buf;
token = rtas_token("ibm,update-nodes");
if (token == RTAS_UNKNOWN_SERVICE)
return -EINVAL;
buf = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
unwa = (struct update_nodes_workarea *)&buf[0];
unwa->unit_address = cpu_to_be64(adapter->guest->handle);
do {
rc = rcall(token, buf, scope);
if (rc && rc != 1)
break;
data = (__be32 *)buf + 4;
while (be32_to_cpu(*data) & NODE_ACTION_MASK) {
action = be32_to_cpu(*data) & NODE_ACTION_MASK;
node_count = be32_to_cpu(*data) & NODE_COUNT_MASK;
pr_devel("device reconfiguration - action: %#x, nodes: %#x\n",
action, node_count);
data++;
for (i = 0; i < node_count; i++) {
phandle = *data++;
switch (action) {
case OPCODE_DELETE:
/* nothing to do */
break;
case OPCODE_UPDATE:
update_node(phandle, scope);
break;
case OPCODE_ADD:
/* nothing to do, just move pointer */
drc_index = *data++;
break;
}
}
}
} while (rc == 1);
kfree(buf);
return 0;
}
static int handle_image(struct cxl *adapter, int operation,
long (*fct)(u64, u64, u64, u64 *),
struct cxl_adapter_image *ai)
{
size_t mod, s_copy, len_chunk = 0;
struct ai_header *header = NULL;
unsigned
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