#define pr_fmt(fmt) "SCMI Notifications PERF - " fmt
#include <linux/bits.h>
#include <linux/hashtable.h>
#include <linux/io.h>
#include <linux/log2.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/scmi_protocol.h>
#include <linux/sort.h>
#include <linux/xarray.h>
#include <trace/events/scmi.h>
#include "protocols.h"
#include "notify.h"
#define SCMI_PROTOCOL_SUPPORTED_VERSION 0x40000
#define MAX_OPPS 64
enum scmi_performance_protocol_cmd {
PERF_DOMAIN_ATTRIBUTES = 0x3,
PERF_DESCRIBE_LEVELS = 0x4,
PERF_LIMITS_SET = 0x5,
PERF_LIMITS_GET = 0x6,
PERF_LEVEL_SET = 0x7,
PERF_LEVEL_GET = 0x8,
PERF_NOTIFY_LIMITS = 0x9,
PERF_NOTIFY_LEVEL = 0xa,
PERF_DESCRIBE_FASTCHANNEL = 0xb,
PERF_DOMAIN_NAME_GET = 0xc,
};
enum {
PERF_FC_LEVEL,
PERF_FC_LIMIT,
PERF_FC_MAX,
};
struct scmi_opp {
u32 perf;
u32 power;
u32 trans_latency_us;
u32 indicative_freq;
u32 level_index;
struct hlist_node hash;
};
struct scmi_msg_resp_perf_attributes {
__le16 num_domains;
__le16 flags;
#define POWER_SCALE_IN_MILLIWATT(x) ((x) & BIT(0))
#define POWER_SCALE_IN_MICROWATT(x) ((x) & BIT(1))
__le32 stats_addr_low;
__le32 stats_addr_high;
__le32 stats_size;
};
struct scmi_msg_resp_perf_domain_attributes {
__le32 flags;
#define SUPPORTS_SET_LIMITS(x) ((x) & BIT(31))
#define SUPPORTS_SET_PERF_LVL(x) ((x) & BIT(30))
#define SUPPORTS_PERF_LIMIT_NOTIFY(x) ((x) & BIT(29))
#define SUPPORTS_PERF_LEVEL_NOTIFY(x) ((x) & BIT(28))
#define SUPPORTS_PERF_FASTCHANNELS(x) ((x) & BIT(27))
#define SUPPORTS_EXTENDED_NAMES(x) ((x) & BIT(26))
#define SUPPORTS_LEVEL_INDEXING(x) ((x) & BIT(25))
__le32 rate_limit_us;
__le32 sustained_freq_khz;
__le32 sustained_perf_level;
u8 name[SCMI_SHORT_NAME_MAX_SIZE];
};
struct scmi_msg_perf_describe_levels {
__le32 domain;
__le32 level_index;
};
struct scmi_perf_set_limits {
__le32 domain;
__le32 max_level;
__le32 min_level;
};
struct scmi_perf_get_limits {
__le32 max_level;
__le32 min_level;
};
struct scmi_perf_set_level {
__le32 domain;
__le32 level;
};
struct scmi_perf_notify_level_or_limits {
__le32 domain;
__le32 notify_enable;
};
struct scmi_perf_limits_notify_payld {
__le32 agent_id;
__le32 domain_id;
__le32 range_max;
__le32 range_min;
};
struct scmi_perf_level_notify_payld {
__le32 agent_id;
__le32 domain_id;
__le32 performance_level;
};
struct scmi_msg_resp_perf_describe_levels {
__le16 num_returned;
__le16 num_remaining;
struct {
__le32 perf_val;
__le32 power;
__le16 transition_latency_us;
__le16 reserved;
} opp[];
};
struct scmi_msg_resp_perf_describe_levels_v4 {
__le16 num_returned;
__le16 num_remaining;
struct {
__le32 perf_val;
__le32 power;
__le16 transition_latency_us;
__le16 reserved;
__le32 indicative_freq;
__le32 level_index;
} opp[];
};
struct perf_dom_info {
u32 id;
bool set_limits;
bool perf_limit_notify;
bool perf_level_notify;
bool perf_fastchannels;
bool level_indexing_mode;
u32 opp_count;
u32 rate_limit_us;
u32 sustained_freq_khz;
u32 sustained_perf_level;
unsigned long mult_factor;
struct scmi_perf_domain_info info;
struct scmi_opp opp[MAX_OPPS];
struct scmi_fc_info *fc_info;
struct xarray opps_by_idx;
struct xarray opps_by_lvl;
DECLARE_HASHTABLE(opps_by_freq, ilog2(MAX_OPPS));
};
#define LOOKUP_BY_FREQ(__htp, __freq) \
({ \
\
u32 f_ = (u32)(__freq); \
struct scmi_opp *_opp; \
\
hash_for_each_possible((__htp), _opp, hash, f_) \
if (_opp->indicative_freq == f_) \
break; \
_opp; \
})
struct scmi_perf_info {
u16 num_domains;
enum scmi_power_scale power_scale;
u64 stats_addr;
u32 stats_size;
bool notify_lvl_cmd;
bool notify_lim_cmd;
struct perf_dom_info *dom_info;
};
static enum scmi_performance_protocol_cmd evt_2_cmd[] = {
PERF_NOTIFY_LIMITS,
PERF_NOTIFY_LEVEL,
};
static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph,
struct scmi_perf_info *pi)
{
int ret;
struct scmi_xfer *t;
struct scmi_msg_resp_perf_attributes *attr;
ret = ph->xops->xfer_get_init(ph, PROTOCOL_ATTRIBUTES, 0,
sizeof(*attr), &t);
if (ret)
return ret;
attr = t->rx.buf;
ret = ph->xops->do_xfer(ph, t);
if (!ret) {
u16 flags = le16_to_cpu(attr->flags);
pi->num_domains = le16_to_cpu(attr->num_domains);
if (POWER_SCALE_IN_MILLIWATT(flags))
pi->power_scale = SCMI_POWER_MILLIWATTS;
if (PROTOCOL_REV_MAJOR(ph->version) >= 0x3)
if (POWER_SCALE_IN_MICROWATT(flags))
pi->power_scale = SCMI_POWER_MICROWATTS;
pi->stats_addr = le32_to_cpu(attr->stats_addr_low) |
(u64)le32_to_cpu(attr->stats_addr_high) << 32;
pi->stats_size = le32_to_cpu(attr->stats_size);
}
ph->xops->xfer_put(ph, t);
if (!ret) {
if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LEVEL, NULL))
pi->notify_lvl_cmd = true;
if (!ph->hops->protocol_msg_check(ph, PERF_NOTIFY_LIMITS, NULL))
pi->notify_lim_cmd = true;
}
return ret;
}
static void scmi_perf_xa_destroy(void *data)
{
int domain;
struct scmi_perf_info *pinfo = data;
for (domain = 0; domain < pinfo->num_domains; domain++) {
xa_destroy(&((pinfo->dom_info + domain)->opps_by_idx));
xa_destroy(&((pinfo->dom_info + domain)->opps_by_lvl));
}
}
static int
scmi_perf_domain_attributes_get(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom_info,
bool notify_lim_cmd, bool notify_lvl_cmd)
{
int ret;
u32 flags;
struct scmi_xfer *t;
struct scmi_msg_resp_perf_domain_attributes *attr;
ret = ph->xops->xfer_get_init(ph, PERF_DOMAIN_ATTRIBUTES,
sizeof(dom_info->id), sizeof(*attr), &t);
if (ret)
return ret;
put_unaligned_le32(dom_info->id, t->tx.buf);
attr = t->rx.buf;
ret = ph->xops->do_xfer(ph, t);
if (!ret) {
flags = le32_to_cpu(attr->flags);
dom_info->set_limits = SUPPORTS_SET_LIMITS(flags);
dom_info->info.set_perf = SUPPORTS_SET_PERF_LVL(flags);
if (notify_lim_cmd)
dom_info->perf_limit_notify =
SUPPORTS_PERF_LIMIT_NOTIFY(flags);
if (notify_lvl_cmd)
dom_info->perf_level_notify =
SUPPORTS_PERF_LEVEL_NOTIFY(flags);
dom_info->perf_fastchannels = SUPPORTS_PERF_FASTCHANNELS(flags);
if (PROTOCOL_REV_MAJOR(ph->version) >= 0x4)
dom_info->level_indexing_mode =
SUPPORTS_LEVEL_INDEXING(flags);
dom_info->rate_limit_us = le32_to_cpu(attr->rate_limit_us) &
GENMASK(19, 0);
dom_info->sustained_freq_khz =
le32_to_cpu(attr->sustained_freq_khz);
dom_info->sustained_perf_level =
le32_to_cpu(attr->sustained_perf_level);
if (!dom_info->sustained_freq_khz ||
!dom_info->sustained_perf_level ||
dom_info->level_indexing_mode) {
dom_info->mult_factor = 1000;
} else {
dom_info->mult_factor =
(dom_info->sustained_freq_khz * 1000UL)
/ dom_info->sustained_perf_level;
if ((dom_info->sustained_freq_khz * 1000UL) %
dom_info->sustained_perf_level)
dev_warn(ph->dev,
"multiplier for domain %d rounded\n",
dom_info->id);
}
if (!dom_info->mult_factor)
dev_warn(ph->dev,
"Wrong sustained perf/frequency(domain %d)\n",
dom_info->id);
strscpy(dom_info->info.name, attr->name,
SCMI_SHORT_NAME_MAX_SIZE);
}
ph->xops->xfer_put(ph, t);
if (!ret && PROTOCOL_REV_MAJOR(ph->version) >= 0x3 &&
SUPPORTS_EXTENDED_NAMES(flags))
ph->hops->extended_name_get(ph, PERF_DOMAIN_NAME_GET,
dom_info->id, NULL, dom_info->info.name,
SCMI_MAX_STR_SIZE);
xa_init(&dom_info->opps_by_lvl);
if (dom_info->level_indexing_mode) {
xa_init(&dom_info->opps_by_idx);
hash_init(dom_info->opps_by_freq);
}
return ret;
}
static int opp_cmp_func(const void *opp1, const void *opp2)
{
const struct scmi_opp *t1 = opp1, *t2 = opp2;
return t1->perf - t2->perf;
}
static void iter_perf_levels_prepare_message(void *message,
unsigned int desc_index,
const void *priv)
{
struct scmi_msg_perf_describe_levels *msg = message;
const struct perf_dom_info *perf_dom = priv;
msg->domain = cpu_to_le32(perf_dom->id);
msg->level_index = cpu_to_le32(desc_index);
}
static int iter_perf_levels_update_state(struct scmi_iterator_state *st,
const void *response, void *priv)
{
const struct scmi_msg_resp_perf_describe_levels *r = response;
st->num_returned = le16_to_cpu(r->num_returned);
st->num_remaining = le16_to_cpu(r->num_remaining);
return 0;
}
static inline int
process_response_opp(struct device *dev, struct perf_dom_info *dom,
struct scmi_opp *opp, unsigned int loop_idx,
const struct scmi_msg_resp_perf_describe_levels *r)
{
int ret;
opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val);
opp->power = le32_to_cpu(r->opp[loop_idx].power);
opp->trans_latency_us =
le16_to_cpu(r->opp[loop_idx].transition_latency_us);
ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL);
if (ret) {
dev_info(dev, FW_BUG "Failed to add opps_by_lvl at %d for %s - ret:%d\n",
opp->perf, dom->info.name, ret);
return ret;
}
return 0;
}
static inline int
process_response_opp_v4(struct device *dev, struct perf_dom_info *dom,
struct scmi_opp *opp, unsigned int loop_idx,
const struct scmi_msg_resp_perf_describe_levels_v4 *r)
{
int ret;
opp->perf = le32_to_cpu(r->opp[loop_idx].perf_val);
opp->power = le32_to_cpu(r->opp[loop_idx].power);
opp->trans_latency_us =
le16_to_cpu(r->opp[loop_idx].transition_latency_us);
ret = xa_insert(&dom->opps_by_lvl, opp->perf, opp, GFP_KERNEL);
if (ret) {
dev_info(dev, FW_BUG "Failed to add opps_by_lvl at %d for %s - ret:%d\n",
opp->perf, dom->info.name, ret);
return ret;
}
opp->indicative_freq = le32_to_cpu(r->opp[loop_idx].indicative_freq);
if (dom->level_indexing_mode) {
opp->level_index = le32_to_cpu(r->opp[loop_idx].level_index);
ret = xa_insert(&dom->opps_by_idx, opp->level_index, opp,
GFP_KERNEL);
if (ret) {
dev_warn(dev,
"Failed to add opps_by_idx at %d for %s - ret:%d\n",
opp->level_index, dom->info.name, ret);
xa_erase(&dom->opps_by_lvl, opp->perf);
return ret;
}
hash_add(dom->opps_by_freq, &opp->hash, opp->indicative_freq);
}
return 0;
}
static int
iter_perf_levels_process_response(const struct scmi_protocol_handle *ph,
const void *response,
struct scmi_iterator_state *st, void *priv)
{
int ret;
struct scmi_opp *opp;
struct perf_dom_info *perf_dom = priv;
opp = &perf_dom->opp[perf_dom->opp_count];
if (PROTOCOL_REV_MAJOR(ph->version) <= 0x3)
ret = process_response_opp(ph->dev, perf_dom, opp,
st->loop_idx, response);
else
ret = process_response_opp_v4(ph->dev, perf_dom, opp,
st->loop_idx, response);
if (ret)
return ret == -EBUSY ? 0 : ret;
perf_dom->opp_count++;
dev_dbg(ph->dev, "Level %d Power %d Latency %dus Ifreq %d Index %d\n",
opp->perf, opp->power, opp->trans_latency_us,
opp->indicative_freq, opp->level_index);
return 0;
}
static int
scmi_perf_describe_levels_get(const struct scmi_protocol_handle *ph,
struct perf_dom_info *perf_dom)
{
int ret;
void *iter;
struct scmi_iterator_ops ops = {
.prepare_message = iter_perf_levels_prepare_message,
.update_state = iter_perf_levels_update_state,
.process_response = iter_perf_levels_process_response,
};
iter = ph->hops->iter_response_init(ph, &ops, MAX_OPPS,
PERF_DESCRIBE_LEVELS,
sizeof(struct scmi_msg_perf_describe_levels),
perf_dom);
if (IS_ERR(iter))
return PTR_ERR(iter);
ret = ph->hops->iter_response_run(iter);
if (ret)
return ret;
if (perf_dom->opp_count)
sort(perf_dom->opp, perf_dom->opp_count,
sizeof(struct scmi_opp), opp_cmp_func, NULL);
return ret;
}
static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph)
{
struct scmi_perf_info *pi = ph->get_priv(ph);
return pi->num_domains;
}
static inline struct perf_dom_info *
scmi_perf_domain_lookup(const struct scmi_protocol_handle *ph, u32 domain)
{
struct scmi_perf_info *pi = ph->get_priv(ph);
if (domain >= pi->num_domains)
return ERR_PTR(-EINVAL);
return pi->dom_info + domain;
}
static const struct scmi_perf_domain_info *
scmi_perf_info_get(const struct scmi_protocol_handle *ph, u32 domain)
{
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return ERR_PTR(-EINVAL);
return &dom->info;
}
static int scmi_perf_msg_limits_set(const struct scmi_protocol_handle *ph,
u32 domain, u32 max_perf, u32 min_perf)
{
int ret;
struct scmi_xfer *t;
struct scmi_perf_set_limits *limits;
ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_SET,
sizeof(*limits), 0, &t);
if (ret)
return ret;
limits = t->tx.buf;
limits->domain = cpu_to_le32(domain);
limits->max_level = cpu_to_le32(max_perf);
limits->min_level = cpu_to_le32(min_perf);
ret = ph->xops->do_xfer(ph, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static int __scmi_perf_limits_set(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom, u32 max_perf,
u32 min_perf)
{
if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].set_addr) {
struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT];
trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_SET,
dom->id, min_perf, max_perf);
iowrite32(max_perf, fci->set_addr);
iowrite32(min_perf, fci->set_addr + 4);
ph->hops->fastchannel_db_ring(fci->set_db);
return 0;
}
return scmi_perf_msg_limits_set(ph, dom->id, max_perf, min_perf);
}
static int scmi_perf_limits_set(const struct scmi_protocol_handle *ph,
u32 domain, u32 max_perf, u32 min_perf)
{
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
if (!dom->set_limits)
return -EOPNOTSUPP;
if (PROTOCOL_REV_MAJOR(ph->version) >= 0x3 && !max_perf && !min_perf)
return -EINVAL;
if (dom->level_indexing_mode) {
struct scmi_opp *opp;
if (min_perf) {
opp = xa_load(&dom->opps_by_lvl, min_perf);
if (!opp)
return -EIO;
min_perf = opp->level_index;
}
if (max_perf) {
opp = xa_load(&dom->opps_by_lvl, max_perf);
if (!opp)
return -EIO;
max_perf = opp->level_index;
}
}
return __scmi_perf_limits_set(ph, dom, max_perf, min_perf);
}
static int scmi_perf_msg_limits_get(const struct scmi_protocol_handle *ph,
u32 domain, u32 *max_perf, u32 *min_perf)
{
int ret;
struct scmi_xfer *t;
struct scmi_perf_get_limits *limits;
ret = ph->xops->xfer_get_init(ph, PERF_LIMITS_GET,
sizeof(__le32), 0, &t);
if (ret)
return ret;
put_unaligned_le32(domain, t->tx.buf);
ret = ph->xops->do_xfer(ph, t);
if (!ret) {
limits = t->rx.buf;
*max_perf = le32_to_cpu(limits->max_level);
*min_perf = le32_to_cpu(limits->min_level);
}
ph->xops->xfer_put(ph, t);
return ret;
}
static int __scmi_perf_limits_get(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom, u32 *max_perf,
u32 *min_perf)
{
if (dom->fc_info && dom->fc_info[PERF_FC_LIMIT].get_addr) {
struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LIMIT];
*max_perf = ioread32(fci->get_addr);
*min_perf = ioread32(fci->get_addr + 4);
trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LIMITS_GET,
dom->id, *min_perf, *max_perf);
return 0;
}
return scmi_perf_msg_limits_get(ph, dom->id, max_perf, min_perf);
}
static int scmi_perf_limits_get(const struct scmi_protocol_handle *ph,
u32 domain, u32 *max_perf, u32 *min_perf)
{
int ret;
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
ret = __scmi_perf_limits_get(ph, dom, max_perf, min_perf);
if (ret)
return ret;
if (dom->level_indexing_mode) {
struct scmi_opp *opp;
opp = xa_load(&dom->opps_by_idx, *min_perf);
if (!opp)
return -EIO;
*min_perf = opp->perf;
opp = xa_load(&dom->opps_by_idx, *max_perf);
if (!opp)
return -EIO;
*max_perf = opp->perf;
}
return 0;
}
static int scmi_perf_msg_level_set(const struct scmi_protocol_handle *ph,
u32 domain, u32 level, bool poll)
{
int ret;
struct scmi_xfer *t;
struct scmi_perf_set_level *lvl;
ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_SET, sizeof(*lvl), 0, &t);
if (ret)
return ret;
t->hdr.poll_completion = poll;
lvl = t->tx.buf;
lvl->domain = cpu_to_le32(domain);
lvl->level = cpu_to_le32(level);
ret = ph->xops->do_xfer(ph, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static int __scmi_perf_level_set(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom, u32 level,
bool poll)
{
if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr) {
struct scmi_fc_info *fci = &dom->fc_info[PERF_FC_LEVEL];
trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_SET,
dom->id, level, 0);
iowrite32(level, fci->set_addr);
ph->hops->fastchannel_db_ring(fci->set_db);
return 0;
}
return scmi_perf_msg_level_set(ph, dom->id, level, poll);
}
static int scmi_perf_level_set(const struct scmi_protocol_handle *ph,
u32 domain, u32 level, bool poll)
{
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
if (!dom->info.set_perf)
return -EOPNOTSUPP;
if (dom->level_indexing_mode) {
struct scmi_opp *opp;
opp = xa_load(&dom->opps_by_lvl, level);
if (!opp)
return -EIO;
level = opp->level_index;
}
return __scmi_perf_level_set(ph, dom, level, poll);
}
static int scmi_perf_msg_level_get(const struct scmi_protocol_handle *ph,
u32 domain, u32 *level, bool poll)
{
int ret;
struct scmi_xfer *t;
ret = ph->xops->xfer_get_init(ph, PERF_LEVEL_GET,
sizeof(u32), sizeof(u32), &t);
if (ret)
return ret;
t->hdr.poll_completion = poll;
put_unaligned_le32(domain, t->tx.buf);
ret = ph->xops->do_xfer(ph, t);
if (!ret)
*level = get_unaligned_le32(t->rx.buf);
ph->xops->xfer_put(ph, t);
return ret;
}
static int __scmi_perf_level_get(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom, u32 *level,
bool poll)
{
if (dom->fc_info && dom->fc_info[PERF_FC_LEVEL].get_addr) {
*level = ioread32(dom->fc_info[PERF_FC_LEVEL].get_addr);
trace_scmi_fc_call(SCMI_PROTOCOL_PERF, PERF_LEVEL_GET,
dom->id, *level, 0);
return 0;
}
return scmi_perf_msg_level_get(ph, dom->id, level, poll);
}
static int scmi_perf_level_get(const struct scmi_protocol_handle *ph,
u32 domain, u32 *level, bool poll)
{
int ret;
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
ret = __scmi_perf_level_get(ph, dom, level, poll);
if (ret)
return ret;
if (dom->level_indexing_mode) {
struct scmi_opp *opp;
opp = xa_load(&dom->opps_by_idx, *level);
if (!opp)
return -EIO;
*level = opp->perf;
}
return 0;
}
static int scmi_perf_level_limits_notify(const struct scmi_protocol_handle *ph,
u32 domain, int message_id,
bool enable)
{
int ret;
struct scmi_xfer *t;
struct scmi_perf_notify_level_or_limits *notify;
ret = ph->xops->xfer_get_init(ph, message_id, sizeof(*notify), 0, &t);
if (ret)
return ret;
notify = t->tx.buf;
notify->domain = cpu_to_le32(domain);
notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0;
ret = ph->xops->do_xfer(ph, t);
ph->xops->xfer_put(ph, t);
return ret;
}
static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph,
struct perf_dom_info *dom)
{
struct scmi_fc_info *fc;
fc = devm_kcalloc(ph->dev, PERF_FC_MAX, sizeof(*fc), GFP_KERNEL);
if (!fc)
return;
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LEVEL_GET, 4, dom->id,
&fc[PERF_FC_LEVEL].get_addr, NULL,
&fc[PERF_FC_LEVEL].rate_limit);
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LIMITS_GET, 8, dom->id,
&fc[PERF_FC_LIMIT].get_addr, NULL,
&fc[PERF_FC_LIMIT].rate_limit);
if (dom->info.set_perf)
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LEVEL_SET, 4, dom->id,
&fc[PERF_FC_LEVEL].set_addr,
&fc[PERF_FC_LEVEL].set_db,
&fc[PERF_FC_LEVEL].rate_limit);
if (dom->set_limits)
ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL,
PERF_LIMITS_SET, 8, dom->id,
&fc[PERF_FC_LIMIT].set_addr,
&fc[PERF_FC_LIMIT].set_db,
&fc[PERF_FC_LIMIT].rate_limit);
dom->fc_info = fc;
}
static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph,
struct device *dev, u32 domain)
{
int idx, ret;
unsigned long freq;
struct dev_pm_opp_data data = {};
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
for (idx = 0; idx < dom->opp_count; idx++) {
if (!dom->level_indexing_mode)
freq = dom->opp[idx].perf * dom->mult_factor;
else
freq = dom->opp[idx].indicative_freq * dom->mult_factor;
data.turbo = freq > dom->sustained_freq_khz * 1000UL;
data.level = dom->opp[idx].perf;
data.freq = freq;
ret = dev_pm_opp_add_dynamic(dev, &data);
if (ret) {
dev_warn(dev, "[%d][%s]: Failed to add OPP[%d] %lu\n",
domain, dom->info.name, idx, freq);
dev_pm_opp_remove_all_dynamic(dev);
return ret;
}
dev_dbg(dev, "[%d][%s]:: Registered OPP[%d] %lu\n",
domain, dom->info.name, idx, freq);
}
return 0;
}
static int
scmi_dvfs_transition_latency_get(const struct scmi_protocol_handle *ph,
u32 domain)
{
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
return dom->opp[dom->opp_count - 1].trans_latency_us * 1000;
}
static int
scmi_dvfs_rate_limit_get(const struct scmi_protocol_handle *ph,
u32 domain, u32 *rate_limit)
{
struct perf_dom_info *dom;
if (!rate_limit)
return -EINVAL;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
*rate_limit = dom->rate_limit_us;
return 0;
}
static int scmi_dvfs_freq_set(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long freq, bool poll)
{
unsigned int level;
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
if (!dom->level_indexing_mode) {
level = freq / dom->mult_factor;
} else {
struct scmi_opp *opp;
opp = LOOKUP_BY_FREQ(dom->opps_by_freq,
freq / dom->mult_factor);
if (!opp)
return -EIO;
level = opp->level_index;
}
return __scmi_perf_level_set(ph, dom, level, poll);
}
static int scmi_dvfs_freq_get(const struct scmi_protocol_handle *ph, u32 domain,
unsigned long *freq, bool poll)
{
int ret;
u32 level;
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
ret = __scmi_perf_level_get(ph, dom, &level, poll);
if (ret)
return ret;
if (!dom->level_indexing_mode) {
*freq = level * dom->mult_factor;
} else {
struct scmi_opp *opp;
opp = xa_load(&dom->opps_by_idx, level);
if (!opp)
return -EIO;
*freq = opp->indicative_freq * dom->mult_factor;
}
return ret;
}
static int scmi_dvfs_est_power_get(const struct scmi_protocol_handle *ph,
u32 domain, unsigned long *freq,
unsigned long *power)
{
struct perf_dom_info *dom;
unsigned long opp_freq;
int idx, ret = -EINVAL;
struct scmi_opp *opp;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
for (opp = dom->opp, idx = 0; idx < dom->opp_count; idx++, opp++) {
if (!dom->level_indexing_mode)
opp_freq = opp->perf * dom->mult_factor;
else
opp_freq = opp->indicative_freq * dom->mult_factor;
if (opp_freq < *freq)
continue;
*freq = opp_freq;
*power = opp->power;
ret = 0;
break;
}
return ret;
}
static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph,
u32 domain)
{
struct perf_dom_info *dom;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return false;
return dom->fc_info && dom->fc_info[PERF_FC_LEVEL].set_addr;
}
static int scmi_fast_switch_rate_limit(const struct scmi_protocol_handle *ph,
u32 domain, u32 *rate_limit)
{
struct perf_dom_info *dom;
if (!rate_limit)
return -EINVAL;
dom = scmi_perf_domain_lookup(ph, domain);
if (IS_ERR(dom))
return PTR_ERR(dom);
if (!dom->fc_info)
return -EINVAL;
*rate_limit = dom->fc_info[PERF_FC_LEVEL].rate_limit;
return 0;
}
static enum scmi_power_scale
scmi_power_scale_get(const struct scmi_protocol_handle *ph)
{
struct scmi_perf_info *pi = ph->get_priv(ph);
return pi->power_scale;
}
static const struct scmi_perf_proto_ops perf_proto_ops = {
.num_domains_get = scmi_perf_num_domains_get,
.info_get = scmi_perf_info_get,
.limits_set = scmi_perf_limits_set,
.limits_get = scmi_perf_limits_get,
.level_set = scmi_perf_level_set,
.level_get = scmi_perf_level_get,
.transition_latency_get = scmi_dvfs_transition_latency_get,
.rate_limit_get = scmi_dvfs_rate_limit_get,
.device_opps_add = scmi_dvfs_device_opps_add,
.freq_set = scmi_dvfs_freq_set,
.freq_get = scmi_dvfs_freq_get,
.est_power_get = scmi_dvfs_est_power_get,
.fast_switch_possible = scmi_fast_switch_possible,
.fast_switch_rate_limit = scmi_fast_switch_rate_limit,
.power_scale_get = scmi_power_scale_get,
};
static bool scmi_perf_notify_supported(const struct scmi_protocol_handle *ph,
u8 evt_id, u32 src_id)
{
bool supported;
struct perf_dom_info *dom;
if (evt_id >= ARRAY_SIZE(evt_2_cmd))
return false;
dom = scmi_perf_domain_lookup(ph, src_id);
if (IS_ERR(dom))
return false;
if (evt_id == SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED)
supported = dom->perf_limit_notify;
else
supported = dom->perf_level_notify;
return supported;
}
static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph,
u8 evt_id, u32 src_id, bool enable)
{
int ret, cmd_id;
if (evt_id >= ARRAY_SIZE(evt_2_cmd))
return -EINVAL;
cmd_id = evt_2_cmd[evt_id];
ret = scmi_perf_level_limits_notify(ph, src_id, cmd_id, enable);
if (ret)
pr_debug("FAIL_ENABLED - evt[%X] dom[%d] - ret:%d\n",
evt_id, src_id, ret);
return ret;
}
static int
scmi_perf_xlate_opp_to_freq(struct perf_dom_info *dom,
unsigned int index, unsigned long *freq)
{
struct scmi_opp *opp;
if (!dom || !freq)
return -EINVAL;
if (!dom->level_indexing_mode) {
opp = xa_load(&dom->opps_by_lvl, index);
if (!opp)
return -ENODEV;
*freq = opp->perf * dom->mult_factor;
} else {
opp = xa_load(&dom->opps_by_idx, index);
if (!opp)
return -ENODEV;
*freq = opp->indicative_freq * dom->mult_factor;
}
return 0;
}
static void *scmi_perf_fill_custom_report(const struct scmi_protocol_handle *ph,
u8 evt_id, ktime_t timestamp,
const void *payld, size_t payld_sz,
void *report, u32 *src_id)
{
int ret;
void *rep = NULL;
struct perf_dom_info *dom;
switch (evt_id) {
case SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED:
{
const struct scmi_perf_limits_notify_payld *p = payld;
struct scmi_perf_limits_report *r = report;
unsigned long freq_min, freq_max;
if (sizeof(*p) != payld_sz)
break;
r->timestamp = timestamp;
r->agent_id = le32_to_cpu(p->agent_id);
r->domain_id = le32_to_cpu(p->domain_id);
r->range_max = le32_to_cpu(p->range_max);
r->range_min = le32_to_cpu(p->range_min);
dom = scmi_perf_domain_lookup(ph, r->domain_id);
if (IS_ERR(dom))
break;
*src_id = r->domain_id;
rep = r;
ret = scmi_perf_xlate_opp_to_freq(dom, r->range_max, &freq_max);
if (ret)
break;
ret = scmi_perf_xlate_opp_to_freq(dom, r->range_min, &freq_min);
if (ret)
break;
r->range_max_freq = freq_max;
r->range_min_freq = freq_min;
break;
}
case SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED:
{
const struct scmi_perf_level_notify_payld *p = payld;
struct scmi_perf_level_report *r = report;
unsigned long freq;
if (sizeof(*p) != payld_sz)
break;
r->timestamp = timestamp;
r->agent_id = le32_to_cpu(p->agent_id);
r->domain_id = le32_to_cpu(p->domain_id);
r->performance_level = le32_to_cpu(p->performance_level);
dom = scmi_perf_domain_lookup(ph, r->domain_id);
if (IS_ERR(dom))
break;
*src_id = r->domain_id;
rep = r;
ret = scmi_perf_xlate_opp_to_freq(dom, r->performance_level,
&freq);
if (ret)
break;
r->performance_level_freq = freq;
break;
}
default:
break;
}
return rep;
}
static int scmi_perf_get_num_sources(const struct scmi_protocol_handle *ph)
{
struct scmi_perf_info *pi = ph->get_priv(ph);
if (!pi)
return -EINVAL;
return pi->num_domains;
}
static const struct scmi_event perf_events[] = {
{
.id = SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED,
.max_payld_sz = sizeof(struct scmi_perf_limits_notify_payld),
.max_report_sz = sizeof(struct scmi_perf_limits_report),
},
{
.id = SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED,
.max_payld_sz = sizeof(struct scmi_perf_level_notify_payld),
.max_report_sz = sizeof(struct scmi_perf_level_report),
},
};
static const struct scmi_event_ops perf_event_ops = {
.is_notify_supported = scmi_perf_notify_supported,
.get_num_sources = scmi_perf_get_num_sources,
.set_notify_enabled = scmi_perf_set_notify_enabled,
.fill_custom_report = scmi_perf_fill_custom_report,
};
static const struct scmi_protocol_events perf_protocol_events = {
.queue_sz = SCMI_PROTO_QUEUE_SZ,
.ops = &perf_event_ops,
.evts = perf_events,
.num_events = ARRAY_SIZE(perf_events),
};
static int scmi_perf_protocol_init(const struct scmi_protocol_handle *ph)
{
int domain, ret;
struct scmi_perf_info *pinfo;
dev_dbg(ph->dev, "Performance Version %d.%d\n",
PROTOCOL_REV_MAJOR(ph->version), PROTOCOL_REV_MINOR(ph->version));
pinfo = devm_kzalloc(ph->dev, sizeof(*pinfo), GFP_KERNEL);
if (!pinfo)
return -ENOMEM;
ret = scmi_perf_attributes_get(ph, pinfo);
if (ret)
return ret;
pinfo->dom_info = devm_kcalloc(ph->dev, pinfo->num_domains,
sizeof(*pinfo->dom_info), GFP_KERNEL);
if (!pinfo->dom_info)
return -ENOMEM;
for (domain = 0; domain < pinfo->num_domains; domain++) {
struct perf_dom_info *dom = pinfo->dom_info + domain;
dom->id = domain;
scmi_perf_domain_attributes_get(ph, dom, pinfo->notify_lim_cmd,
pinfo->notify_lvl_cmd);
scmi_perf_describe_levels_get(ph, dom);
if (dom->perf_fastchannels)
scmi_perf_domain_init_fc(ph, dom);
}
ret = devm_add_action_or_reset(ph->dev, scmi_perf_xa_destroy, pinfo);
if (ret)
return ret;
return ph->set_priv(ph, pinfo);
}
static const struct scmi_protocol scmi_perf = {
.id = SCMI_PROTOCOL_PERF,
.owner = THIS_MODULE,
.instance_init = &scmi_perf_protocol_init,
.ops = &perf_proto_ops,
.events = &perf_protocol_events,
.supported_version = SCMI_PROTOCOL_SUPPORTED_VERSION,
};
DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(perf, scmi_perf)
