#include <linux/slab.h>
#include <linux/types.h>
#include "adf_mstate_mgr.h"
#define ADF_MSTATE_MAGIC 0xADF5CAEA
#define ADF_MSTATE_VERSION 0x1
struct adf_mstate_sect_h {
u8 id[ADF_MSTATE_ID_LEN];
u32 size;
u32 sub_sects;
u8 state[];
};
u32 adf_mstate_state_size(struct adf_mstate_mgr *mgr)
{
return mgr->state - mgr->buf;
}
static inline u32 adf_mstate_avail_room(struct adf_mstate_mgr *mgr)
{
return mgr->buf + mgr->size - mgr->state;
}
void adf_mstate_mgr_init(struct adf_mstate_mgr *mgr, u8 *buf, u32 size)
{
mgr->buf = buf;
mgr->state = buf;
mgr->size = size;
mgr->n_sects = 0;
};
struct adf_mstate_mgr *adf_mstate_mgr_new(u8 *buf, u32 size)
{
struct adf_mstate_mgr *mgr;
mgr = kzalloc_obj(*mgr);
if (!mgr)
return NULL;
adf_mstate_mgr_init(mgr, buf, size);
return mgr;
}
void adf_mstate_mgr_destroy(struct adf_mstate_mgr *mgr)
{
kfree(mgr);
}
void adf_mstate_mgr_init_from_parent(struct adf_mstate_mgr *mgr,
struct adf_mstate_mgr *p_mgr)
{
adf_mstate_mgr_init(mgr, p_mgr->state,
p_mgr->size - adf_mstate_state_size(p_mgr));
}
void adf_mstate_mgr_init_from_psect(struct adf_mstate_mgr *mgr,
struct adf_mstate_sect_h *p_sect)
{
adf_mstate_mgr_init(mgr, p_sect->state, p_sect->size);
mgr->n_sects = p_sect->sub_sects;
}
static void adf_mstate_preamble_init(struct adf_mstate_preh *preamble)
{
preamble->magic = ADF_MSTATE_MAGIC;
preamble->version = ADF_MSTATE_VERSION;
preamble->preh_len = sizeof(*preamble);
preamble->size = 0;
preamble->n_sects = 0;
}
static int adf_mstate_preamble_def_checker(struct adf_mstate_preh *preamble,
void *opaque)
{
struct adf_mstate_mgr *mgr = opaque;
if (preamble->magic != ADF_MSTATE_MAGIC ||
preamble->version > ADF_MSTATE_VERSION ||
preamble->preh_len > mgr->size) {
pr_debug("QAT: LM - Invalid state (magic=%#x, version=%#x, hlen=%u), state_size=%u\n",
preamble->magic, preamble->version, preamble->preh_len,
mgr->size);
return -EINVAL;
}
return 0;
}
struct adf_mstate_preh *adf_mstate_preamble_add(struct adf_mstate_mgr *mgr)
{
struct adf_mstate_preh *pre = (struct adf_mstate_preh *)mgr->buf;
if (adf_mstate_avail_room(mgr) < sizeof(*pre)) {
pr_err("QAT: LM - Not enough space for preamble\n");
return NULL;
}
adf_mstate_preamble_init(pre);
mgr->state += pre->preh_len;
return pre;
}
int adf_mstate_preamble_update(struct adf_mstate_mgr *mgr)
{
struct adf_mstate_preh *preamble = (struct adf_mstate_preh *)mgr->buf;
preamble->size = adf_mstate_state_size(mgr) - preamble->preh_len;
preamble->n_sects = mgr->n_sects;
return 0;
}
static void adf_mstate_dump_sect(struct adf_mstate_sect_h *sect,
const char *prefix)
{
pr_debug("QAT: LM - %s QAT state section %s\n", prefix, sect->id);
print_hex_dump_debug("h-", DUMP_PREFIX_OFFSET, 16, 2, sect,
sizeof(*sect), true);
print_hex_dump_debug("s-", DUMP_PREFIX_OFFSET, 16, 2, sect->state,
sect->size, true);
}
static inline void __adf_mstate_sect_update(struct adf_mstate_mgr *mgr,
struct adf_mstate_sect_h *sect,
u32 size,
u32 n_subsects)
{
sect->size += size;
sect->sub_sects += n_subsects;
mgr->n_sects++;
mgr->state += sect->size;
adf_mstate_dump_sect(sect, "Add");
}
void adf_mstate_sect_update(struct adf_mstate_mgr *p_mgr,
struct adf_mstate_mgr *curr_mgr,
struct adf_mstate_sect_h *sect)
{
__adf_mstate_sect_update(p_mgr, sect, adf_mstate_state_size(curr_mgr),
curr_mgr->n_sects);
}
static struct adf_mstate_sect_h *adf_mstate_sect_add_header(struct adf_mstate_mgr *mgr,
const char *id)
{
struct adf_mstate_sect_h *sect = (struct adf_mstate_sect_h *)(mgr->state);
if (adf_mstate_avail_room(mgr) < sizeof(*sect)) {
pr_debug("QAT: LM - Not enough space for header of QAT state sect %s\n", id);
return NULL;
}
strscpy(sect->id, id, sizeof(sect->id));
sect->size = 0;
sect->sub_sects = 0;
mgr->state += sizeof(*sect);
return sect;
}
struct adf_mstate_sect_h *adf_mstate_sect_add_vreg(struct adf_mstate_mgr *mgr,
const char *id,
struct adf_mstate_vreginfo *info)
{
struct adf_mstate_sect_h *sect;
sect = adf_mstate_sect_add_header(mgr, id);
if (!sect)
return NULL;
if (adf_mstate_avail_room(mgr) < info->size) {
pr_debug("QAT: LM - Not enough space for QAT state sect %s, requires %u\n",
id, info->size);
return NULL;
}
memcpy(sect->state, info->addr, info->size);
__adf_mstate_sect_update(mgr, sect, info->size, 0);
return sect;
}
struct adf_mstate_sect_h *adf_mstate_sect_add(struct adf_mstate_mgr *mgr,
const char *id,
adf_mstate_populate populate,
void *opaque)
{
struct adf_mstate_mgr sub_sects_mgr;
struct adf_mstate_sect_h *sect;
int avail_room, size;
sect = adf_mstate_sect_add_header(mgr, id);
if (!sect)
return NULL;
if (!populate)
return sect;
avail_room = adf_mstate_avail_room(mgr);
adf_mstate_mgr_init_from_parent(&sub_sects_mgr, mgr);
size = (*populate)(&sub_sects_mgr, sect->state, avail_room, opaque);
if (size < 0)
return NULL;
size += adf_mstate_state_size(&sub_sects_mgr);
if (avail_room < size) {
pr_debug("QAT: LM - Not enough space for QAT state sect %s, requires %u\n",
id, size);
return NULL;
}
__adf_mstate_sect_update(mgr, sect, size, sub_sects_mgr.n_sects);
return sect;
}
static int adf_mstate_sect_validate(struct adf_mstate_mgr *mgr)
{
struct adf_mstate_sect_h *start = (struct adf_mstate_sect_h *)mgr->state;
struct adf_mstate_sect_h *sect = start;
u64 end;
int i;
end = (uintptr_t)mgr->buf + mgr->size;
for (i = 0; i < mgr->n_sects; i++) {
uintptr_t s_start = (uintptr_t)sect->state;
uintptr_t s_end = s_start + sect->size;
if (s_end < s_start || s_end > end) {
pr_debug("QAT: LM - Corrupted state section (index=%u, size=%u) in state_mgr (size=%u, secs=%u)\n",
i, sect->size, mgr->size, mgr->n_sects);
return -EINVAL;
}
sect = (struct adf_mstate_sect_h *)s_end;
}
pr_debug("QAT: LM - Scanned section (last child=%s, size=%lu) in state_mgr (size=%u, secs=%u)\n",
start->id, sizeof(struct adf_mstate_sect_h) * (ulong)(sect - start),
mgr->size, mgr->n_sects);
return 0;
}
u32 adf_mstate_state_size_from_remote(struct adf_mstate_mgr *mgr)
{
struct adf_mstate_preh *preh = (struct adf_mstate_preh *)mgr->buf;
return preh->preh_len + preh->size;
}
int adf_mstate_mgr_init_from_remote(struct adf_mstate_mgr *mgr, u8 *buf, u32 size,
adf_mstate_preamble_checker pre_checker,
void *opaque)
{
struct adf_mstate_preh *pre;
int ret;
adf_mstate_mgr_init(mgr, buf, size);
pre = (struct adf_mstate_preh *)(mgr->buf);
pr_debug("QAT: LM - Dump state preambles\n");
print_hex_dump_debug("", DUMP_PREFIX_OFFSET, 16, 2, pre, pre->preh_len, 0);
if (pre_checker)
ret = (*pre_checker)(pre, opaque);
else
ret = adf_mstate_preamble_def_checker(pre, mgr);
if (ret)
return ret;
mgr->state = mgr->buf + pre->preh_len;
mgr->n_sects = pre->n_sects;
return adf_mstate_sect_validate(mgr);
}
struct adf_mstate_sect_h *adf_mstate_sect_lookup(struct adf_mstate_mgr *mgr,
const char *id,
adf_mstate_action action,
void *opaque)
{
struct adf_mstate_sect_h *sect = (struct adf_mstate_sect_h *)mgr->state;
struct adf_mstate_mgr sub_sects_mgr;
int i, ret;
for (i = 0; i < mgr->n_sects; i++) {
if (!strncmp(sect->id, id, sizeof(sect->id)))
goto found;
sect = (struct adf_mstate_sect_h *)(sect->state + sect->size);
}
return NULL;
found:
adf_mstate_dump_sect(sect, "Found");
adf_mstate_mgr_init_from_psect(&sub_sects_mgr, sect);
if (sect->sub_sects && adf_mstate_sect_validate(&sub_sects_mgr))
return NULL;
if (!action)
return sect;
ret = (*action)(&sub_sects_mgr, sect->state, sect->size, opaque);
if (ret)
return NULL;
return sect;
}
