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drm/xe/hwmon: Add support to manage power limits though mailbox

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Add support to manage power limits using pcode mailbox commands
for supported platforms.

v2:
 - Address review comments. (Badal)
 - Use mailbox commands instead of registers to manage power limits
   for BMG.
 - Clamp the maximum power limit to GPU firmware default value.

v3:
 - Clamp power limit in write also for platforms with mailbox support.

v4:
 - Remove unnecessary debug prints. (Badal)

v5:
 - Update description of variable pl1_on_boot to fix kernel-doc error.

v6:
 - Improve commit message, refer to BIOS as GPU firmware.
 - Change macro READ_PL_FROM_BIOS to READ_PL_FROM_FW.
 - Rectify drm_warn to drm_info.

Signed-off-by: Karthik Poosa <karthik.poosa@intel.com>
Fixes: e90f7a58e6 ("drm/xe/hwmon: Add HWMON support for BMG")
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://lore.kernel.org/r/20250529163458.2354509-2-karthik.poosa@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 7596d839f6)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
This commit is contained in:
Karthik Poosa 2025-05-29 22:04:53 +05:30 committed by Thomas Hellström
parent 8cf8cde41a
commit 25a2aa779f
8 changed files with 320 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/xe/regs/xe_mchbar_regs.h
View File

@ -38,10 +38,10 @@
#define TEMP_MASK REG_GENMASK(7, 0)
#define PCU_CR_PACKAGE_RAPL_LIMIT XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x59a0)
#define PKG_PWR_LIM_1 REG_GENMASK(14, 0)
#define PKG_PWR_LIM_1_EN REG_BIT(15)
#define PKG_PWR_LIM_1_TIME REG_GENMASK(23, 17)
#define PKG_PWR_LIM_1_TIME_X REG_GENMASK(23, 22)
#define PKG_PWR_LIM_1_TIME_Y REG_GENMASK(21, 17)
#define PWR_LIM_VAL REG_GENMASK(14, 0)
#define PWR_LIM_EN REG_BIT(15)
#define PWR_LIM_TIME REG_GENMASK(23, 17)
#define PWR_LIM_TIME_X REG_GENMASK(23, 22)
#define PWR_LIM_TIME_Y REG_GENMASK(21, 17)
#endif /* _XE_MCHBAR_REGS_H_ */

4
drivers/gpu/drm/xe/regs/xe_pcode_regs.h
View File

@ -18,16 +18,12 @@
#define PVC_GT0_PLATFORM_ENERGY_STATUS XE_REG(0x28106c)
#define PVC_GT0_PACKAGE_POWER_SKU XE_REG(0x281080)
#define BMG_PACKAGE_POWER_SKU XE_REG(0x138098)
#define BMG_PACKAGE_POWER_SKU_UNIT XE_REG(0x1380dc)
#define BMG_PACKAGE_ENERGY_STATUS XE_REG(0x138120)
#define BMG_FAN_1_SPEED XE_REG(0x138140)
#define BMG_FAN_2_SPEED XE_REG(0x138170)
#define BMG_FAN_3_SPEED XE_REG(0x1381a0)
#define BMG_VRAM_TEMPERATURE XE_REG(0x1382c0)
#define BMG_PACKAGE_TEMPERATURE XE_REG(0x138434)
#define BMG_PACKAGE_RAPL_LIMIT XE_REG(0x138440)
#define BMG_PLATFORM_ENERGY_STATUS XE_REG(0x138458)
#define BMG_PLATFORM_POWER_LIMIT XE_REG(0x138460)
#endif /* _XE_PCODE_REGS_H_ */

4
drivers/gpu/drm/xe/xe_device_types.h
View File

@ -325,6 +325,10 @@ struct xe_device {
u8 has_heci_gscfi:1;
/** @info.has_llc: Device has a shared CPU+GPU last level cache */
u8 has_llc:1;
/** @info.has_mbx_power_limits: Device has support to manage power limits using
* pcode mailbox commands.
*/
u8 has_mbx_power_limits:1;
/** @info.has_pxp: Device has PXP support */
u8 has_pxp:1;
/** @info.has_range_tlb_invalidation: Has range based TLB invalidations */

384
drivers/gpu/drm/xe/xe_hwmon.c
View File

@ -51,6 +51,14 @@ enum xe_fan_channel {
FAN_MAX,
};
/*
* For platforms that support mailbox commands for power limits, REG_PKG_POWER_SKU_UNIT is
* not supported and below are SKU units to be used.
*/
#define PWR_UNIT 0x3
#define ENERGY_UNIT 0xe
#define TIME_UNIT 0xa
/*
* SF_* - scale factors for particular quantities according to hwmon spec.
*/
@ -60,6 +68,18 @@ enum xe_fan_channel {
#define SF_ENERGY 1000000 /* microjoules */
#define SF_TIME 1000 /* milliseconds */
/*
* PL*_HWMON_ATTR - mapping of hardware power limits to corresponding hwmon power attribute.
*/
#define PL1_HWMON_ATTR hwmon_power_max
#define PWR_ATTR_TO_STR(attr) (((attr) == hwmon_power_max) ? "PL1" : "Invalid")
/*
* Timeout for power limit write mailbox command.
*/
#define PL_WRITE_MBX_TIMEOUT_MS (1)
/**
* struct xe_hwmon_energy_info - to accumulate energy
*/
@ -100,8 +120,80 @@ struct xe_hwmon {
struct xe_hwmon_energy_info ei[CHANNEL_MAX];
/** @fi: Fan info for fanN_input */
struct xe_hwmon_fan_info fi[FAN_MAX];
/** @boot_power_limit_read: is boot power limits read */
bool boot_power_limit_read;
/** @pl1_on_boot: power limit PL1 on boot */
u32 pl1_on_boot[CHANNEL_MAX];
};
static int xe_hwmon_pcode_read_power_limit(const struct xe_hwmon *hwmon, u32 attr, int channel,
u32 *uval)
{
struct xe_tile *root_tile = xe_device_get_root_tile(hwmon->xe);
u32 val0 = 0, val1 = 0;
int ret = 0;
ret = xe_pcode_read(root_tile, PCODE_MBOX(PCODE_POWER_SETUP,
(channel == CHANNEL_CARD) ?
READ_PSYSGPU_POWER_LIMIT :
READ_PACKAGE_POWER_LIMIT,
hwmon->boot_power_limit_read ?
READ_PL_FROM_PCODE : READ_PL_FROM_FW),
&val0, &val1);
if (ret) {
drm_dbg(&hwmon->xe->drm, "read failed ch %d val0 0x%08x, val1 0x%08x, ret %d\n",
channel, val0, val1, ret);
*uval = 0;
return ret;
}
/* return the value only if limit is enabled */
if (attr == PL1_HWMON_ATTR)
*uval = (val0 & PWR_LIM_EN) ? val0 : 0;
else if (attr == hwmon_power_label)
*uval = (val0 & PWR_LIM_EN) ? 1 : 0;
else
*uval = 0;
return ret;
}
static int xe_hwmon_pcode_write_power_limit(const struct xe_hwmon *hwmon, u32 attr, u8 channel,
u32 uval)
{
struct xe_tile *root_tile = xe_device_get_root_tile(hwmon->xe);
u32 val0, val1;
int ret = 0;
ret = xe_pcode_read(root_tile, PCODE_MBOX(PCODE_POWER_SETUP,
(channel == CHANNEL_CARD) ?
READ_PSYSGPU_POWER_LIMIT :
READ_PACKAGE_POWER_LIMIT,
hwmon->boot_power_limit_read ?
READ_PL_FROM_PCODE : READ_PL_FROM_FW),
&val0, &val1);
if (ret)
drm_dbg(&hwmon->xe->drm, "read failed ch %d val0 0x%08x, val1 0x%08x, ret %d\n",
channel, val0, val1, ret);
if (attr == PL1_HWMON_ATTR)
val0 = uval;
else
return -EIO;
ret = xe_pcode_write64_timeout(root_tile, PCODE_MBOX(PCODE_POWER_SETUP,
(channel == CHANNEL_CARD) ?
WRITE_PSYSGPU_POWER_LIMIT :
WRITE_PACKAGE_POWER_LIMIT, 0),
val0, val1, PL_WRITE_MBX_TIMEOUT_MS);
if (ret)
drm_dbg(&hwmon->xe->drm, "write failed ch %d val0 0x%08x, val1 0x%08x, ret %d\n",
channel, val0, val1, ret);
return ret;
}
static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg hwmon_reg,
int channel)
{
@ -122,29 +214,19 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
}
break;
case REG_PKG_RAPL_LIMIT:
if (xe->info.platform == XE_BATTLEMAGE) {
if (channel == CHANNEL_PKG)
return BMG_PACKAGE_RAPL_LIMIT;
else
return BMG_PLATFORM_POWER_LIMIT;
} else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG) {
if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG)
return PVC_GT0_PACKAGE_RAPL_LIMIT;
} else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG)) {
else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG))
return PCU_CR_PACKAGE_RAPL_LIMIT;
}
break;
case REG_PKG_POWER_SKU:
if (xe->info.platform == XE_BATTLEMAGE)
return BMG_PACKAGE_POWER_SKU;
else if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG)
if (xe->info.platform == XE_PVC && channel == CHANNEL_PKG)
return PVC_GT0_PACKAGE_POWER_SKU;
else if ((xe->info.platform == XE_DG2) && (channel == CHANNEL_PKG))
return PCU_CR_PACKAGE_POWER_SKU;
break;
case REG_PKG_POWER_SKU_UNIT:
if (xe->info.platform == XE_BATTLEMAGE)
return BMG_PACKAGE_POWER_SKU_UNIT;
else if (xe->info.platform == XE_PVC)
if (xe->info.platform == XE_PVC)
return PVC_GT0_PACKAGE_POWER_SKU_UNIT;
else if (xe->info.platform == XE_DG2)
return PCU_CR_PACKAGE_POWER_SKU_UNIT;
@ -181,7 +263,7 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
return XE_REG(0);
}
#define PL1_DISABLE 0
#define PL_DISABLE 0
/*
* HW allows arbitrary PL1 limits to be set but silently clamps these values to
@ -189,67 +271,83 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
* same pattern for sysfs, allow arbitrary PL1 limits to be set but display
* clamped values when read.
*/
static void xe_hwmon_power_max_read(struct xe_hwmon *hwmon, int channel, long *value)
static void xe_hwmon_power_max_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *value)
{
u64 reg_val, min, max;
struct xe_device *xe = hwmon->xe;
struct xe_reg rapl_limit, pkg_power_sku;
struct xe_mmio *mmio = xe_root_tile_mmio(xe);
rapl_limit = xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel);
pkg_power_sku = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU, channel);
/*
* Valid check of REG_PKG_RAPL_LIMIT is already done in xe_hwmon_power_is_visible.
* So not checking it again here.
*/
if (!xe_reg_is_valid(pkg_power_sku)) {
drm_warn(&xe->drm, "pkg_power_sku invalid\n");
*value = 0;
return;
}
mutex_lock(&hwmon->hwmon_lock);
reg_val = xe_mmio_read32(mmio, rapl_limit);
/* Check if PL1 limit is disabled */
if (!(reg_val & PKG_PWR_LIM_1_EN)) {
*value = PL1_DISABLE;
if (hwmon->xe->info.has_mbx_power_limits) {
xe_hwmon_pcode_read_power_limit(hwmon, attr, channel, (u32 *)&reg_val);
} else {
rapl_limit = xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel);
pkg_power_sku = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU, channel);
/*
* Valid check of REG_PKG_RAPL_LIMIT is already done in xe_hwmon_power_is_visible.
* So not checking it again here.
*/
if (!xe_reg_is_valid(pkg_power_sku)) {
drm_warn(&xe->drm, "pkg_power_sku invalid\n");
*value = 0;
goto unlock;
}
reg_val = xe_mmio_read32(mmio, rapl_limit);
}
/* Check if PL limits are disabled. */
if (!(reg_val & PWR_LIM_EN)) {
*value = PL_DISABLE;
drm_info(&hwmon->xe->drm, "%s disabled for channel %d, val 0x%016llx\n",
PWR_ATTR_TO_STR(attr), channel, reg_val);
goto unlock;
}
reg_val = REG_FIELD_GET(PKG_PWR_LIM_1, reg_val);
reg_val = REG_FIELD_GET(PWR_LIM_VAL, reg_val);
*value = mul_u64_u32_shr(reg_val, SF_POWER, hwmon->scl_shift_power);
reg_val = xe_mmio_read64_2x32(mmio, pkg_power_sku);
min = REG_FIELD_GET(PKG_MIN_PWR, reg_val);
min = mul_u64_u32_shr(min, SF_POWER, hwmon->scl_shift_power);
max = REG_FIELD_GET(PKG_MAX_PWR, reg_val);
max = mul_u64_u32_shr(max, SF_POWER, hwmon->scl_shift_power);
if (min && max)
*value = clamp_t(u64, *value, min, max);
/* For platforms with mailbox power limit support clamping would be done by pcode. */
if (!hwmon->xe->info.has_mbx_power_limits) {
reg_val = xe_mmio_read64_2x32(mmio, pkg_power_sku);
min = REG_FIELD_GET(PKG_MIN_PWR, reg_val);
max = REG_FIELD_GET(PKG_MAX_PWR, reg_val);
min = mul_u64_u32_shr(min, SF_POWER, hwmon->scl_shift_power);
max = mul_u64_u32_shr(max, SF_POWER, hwmon->scl_shift_power);
if (min && max)
*value = clamp_t(u64, *value, min, max);
}
unlock:
mutex_unlock(&hwmon->hwmon_lock);
}
static int xe_hwmon_power_max_write(struct xe_hwmon *hwmon, int channel, long value)
static int xe_hwmon_power_max_write(struct xe_hwmon *hwmon, u32 attr, int channel, long value)
{
struct xe_mmio *mmio = xe_root_tile_mmio(hwmon->xe);
int ret = 0;
u64 reg_val;
u32 reg_val;
struct xe_reg rapl_limit;
rapl_limit = xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel);
mutex_lock(&hwmon->hwmon_lock);
/* Disable PL1 limit and verify, as limit cannot be disabled on all platforms */
if (value == PL1_DISABLE) {
reg_val = xe_mmio_rmw32(mmio, rapl_limit, PKG_PWR_LIM_1_EN, 0);
reg_val = xe_mmio_read32(mmio, rapl_limit);
if (reg_val & PKG_PWR_LIM_1_EN) {
drm_warn(&hwmon->xe->drm, "PL1 disable is not supported!\n");
rapl_limit = xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel);
/* Disable Power Limit and verify, as limit cannot be disabled on all platforms. */
if (value == PL_DISABLE) {
if (hwmon->xe->info.has_mbx_power_limits) {
drm_dbg(&hwmon->xe->drm, "disabling %s on channel %d\n",
PWR_ATTR_TO_STR(attr), channel);
xe_hwmon_pcode_write_power_limit(hwmon, attr, channel, 0);
xe_hwmon_pcode_read_power_limit(hwmon, attr, channel, &reg_val);
} else {
reg_val = xe_mmio_rmw32(mmio, rapl_limit, PWR_LIM_EN, 0);
reg_val = xe_mmio_read32(mmio, rapl_limit);
}
if (reg_val & PWR_LIM_EN) {
drm_warn(&hwmon->xe->drm, "Power limit disable is not supported!\n");
ret = -EOPNOTSUPP;
}
goto unlock;
@ -257,26 +355,50 @@ static int xe_hwmon_power_max_write(struct xe_hwmon *hwmon, int channel, long va
/* Computation in 64-bits to avoid overflow. Round to nearest. */
reg_val = DIV_ROUND_CLOSEST_ULL((u64)value << hwmon->scl_shift_power, SF_POWER);
reg_val = PKG_PWR_LIM_1_EN | REG_FIELD_PREP(PKG_PWR_LIM_1, reg_val);
reg_val = xe_mmio_rmw32(mmio, rapl_limit, PKG_PWR_LIM_1_EN | PKG_PWR_LIM_1, reg_val);
reg_val = PWR_LIM_EN | REG_FIELD_PREP(PWR_LIM_VAL, reg_val);
/*
* Clamp power limit to card-firmware default as maximum, as an additional protection to
* pcode clamp.
*/
if (hwmon->xe->info.has_mbx_power_limits) {
if (reg_val > REG_FIELD_GET(PWR_LIM_VAL, hwmon->pl1_on_boot[channel])) {
reg_val = REG_FIELD_GET(PWR_LIM_VAL, hwmon->pl1_on_boot[channel]);
drm_dbg(&hwmon->xe->drm, "Clamping power limit to firmware default 0x%x\n",
reg_val);
}
}
if (hwmon->xe->info.has_mbx_power_limits)
ret = xe_hwmon_pcode_write_power_limit(hwmon, attr, channel, reg_val);
else
reg_val = xe_mmio_rmw32(mmio, rapl_limit, PWR_LIM_EN | PWR_LIM_VAL,
reg_val);
unlock:
mutex_unlock(&hwmon->hwmon_lock);
return ret;
}
static void xe_hwmon_power_rated_max_read(struct xe_hwmon *hwmon, int channel, long *value)
static void xe_hwmon_power_rated_max_read(struct xe_hwmon *hwmon, u32 attr, int channel,
long *value)
{
struct xe_mmio *mmio = xe_root_tile_mmio(hwmon->xe);
struct xe_reg reg = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU, channel);
u64 reg_val;
u32 reg_val;
if (hwmon->xe->info.has_mbx_power_limits) {
/* PL1 is rated max if supported. */
xe_hwmon_pcode_read_power_limit(hwmon, PL1_HWMON_ATTR, channel, &reg_val);
} else {
/*
* This sysfs file won't be visible if REG_PKG_POWER_SKU is invalid, so valid check
* for this register can be skipped.
* See xe_hwmon_power_is_visible.
*/
struct xe_reg reg = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU, channel);
reg_val = xe_mmio_read32(mmio, reg);
}
/*
* This sysfs file won't be visible if REG_PKG_POWER_SKU is invalid, so valid check
* for this register can be skipped.
* See xe_hwmon_power_is_visible.
*/
reg_val = xe_mmio_read32(mmio, reg);
reg_val = REG_FIELD_GET(PKG_TDP, reg_val);
*value = mul_u64_u32_shr(reg_val, SF_POWER, hwmon->scl_shift_power);
}
@ -330,23 +452,35 @@ xe_hwmon_power_max_interval_show(struct device *dev, struct device_attribute *at
struct xe_mmio *mmio = xe_root_tile_mmio(hwmon->xe);
u32 x, y, x_w = 2; /* 2 bits */
u64 r, tau4, out;
int sensor_index = to_sensor_dev_attr(attr)->index;
int channel = to_sensor_dev_attr(attr)->index;
u32 power_attr = PL1_HWMON_ATTR;
int ret = 0;
xe_pm_runtime_get(hwmon->xe);
mutex_lock(&hwmon->hwmon_lock);
r = xe_mmio_read32(mmio, xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, sensor_index));
if (hwmon->xe->info.has_mbx_power_limits) {
ret = xe_hwmon_pcode_read_power_limit(hwmon, power_attr, channel, (u32 *)&r);
if (ret) {
drm_err(&hwmon->xe->drm,
"power interval read fail, ch %d, attr %d, r 0%llx, ret %d\n",
channel, power_attr, r, ret);
r = 0;
}
} else {
r = xe_mmio_read32(mmio, xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel));
}
mutex_unlock(&hwmon->hwmon_lock);
xe_pm_runtime_put(hwmon->xe);
x = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_X, r);
y = REG_FIELD_GET(PKG_PWR_LIM_1_TIME_Y, r);
x = REG_FIELD_GET(PWR_LIM_TIME_X, r);
y = REG_FIELD_GET(PWR_LIM_TIME_Y, r);
/*
* tau = 1.x * power(2,y), x = bits(23:22), y = bits(21:17)
* tau = (1 + (x / 4)) * power(2,y), x = bits(23:22), y = bits(21:17)
* = (4 | x) << (y - 2)
*
* Here (y - 2) ensures a 1.x fixed point representation of 1.x
@ -373,14 +507,15 @@ xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *a
u64 tau4, r, max_win;
unsigned long val;
int ret;
int sensor_index = to_sensor_dev_attr(attr)->index;
int channel = to_sensor_dev_attr(attr)->index;
u32 power_attr = PL1_HWMON_ATTR;
ret = kstrtoul(buf, 0, &val);
if (ret)
return ret;
/*
* Max HW supported tau in '1.x * power(2,y)' format, x = 0, y = 0x12.
* Max HW supported tau in '(1 + (x / 4)) * power(2,y)' format, x = 0, y = 0x12.
* The hwmon->scl_shift_time default of 0xa results in a max tau of 256 seconds.
*
* The ideal scenario is for PKG_MAX_WIN to be read from the PKG_PWR_SKU register.
@ -400,11 +535,13 @@ xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *a
tau4 = (u64)((1 << x_w) | x) << y;
max_win = mul_u64_u32_shr(tau4, SF_TIME, hwmon->scl_shift_time + x_w);
if (val > max_win)
if (val > max_win) {
drm_warn(&hwmon->xe->drm, "power_interval invalid val 0x%lx\n", val);
return -EINVAL;
}
/* val in hw units */
val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME);
val = DIV_ROUND_CLOSEST_ULL((u64)val << hwmon->scl_shift_time, SF_TIME) + 1;
/*
* Convert val to 1.x * power(2,y)
@ -419,14 +556,21 @@ xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *a
x = (val - (1ul << y)) << x_w >> y;
}
rxy = REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_X, x) | REG_FIELD_PREP(PKG_PWR_LIM_1_TIME_Y, y);
rxy = REG_FIELD_PREP(PWR_LIM_TIME_X, x) |
REG_FIELD_PREP(PWR_LIM_TIME_Y, y);
xe_pm_runtime_get(hwmon->xe);
mutex_lock(&hwmon->hwmon_lock);
r = xe_mmio_rmw32(mmio, xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, sensor_index),
PKG_PWR_LIM_1_TIME, rxy);
if (hwmon->xe->info.has_mbx_power_limits) {
ret = xe_hwmon_pcode_read_power_limit(hwmon, power_attr, channel, (u32 *)&r);
r = (r & ~PWR_LIM_TIME) | rxy;
xe_hwmon_pcode_write_power_limit(hwmon, power_attr, channel, r);
} else {
r = xe_mmio_rmw32(mmio, xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, channel),
PWR_LIM_TIME, rxy);
}
mutex_unlock(&hwmon->hwmon_lock);
@ -435,6 +579,7 @@ xe_hwmon_power_max_interval_store(struct device *dev, struct device_attribute *a
return count;
}
/* PSYS PL1 */
static SENSOR_DEVICE_ATTR(power1_max_interval, 0664,
xe_hwmon_power_max_interval_show,
xe_hwmon_power_max_interval_store, CHANNEL_CARD);
@ -455,10 +600,19 @@ static umode_t xe_hwmon_attributes_visible(struct kobject *kobj,
struct device *dev = kobj_to_dev(kobj);
struct xe_hwmon *hwmon = dev_get_drvdata(dev);
int ret = 0;
int channel = index ? CHANNEL_PKG : CHANNEL_CARD;
u32 power_attr = PL1_HWMON_ATTR;
u32 uval;
xe_pm_runtime_get(hwmon->xe);
ret = xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT, index)) ? attr->mode : 0;
if (hwmon->xe->info.has_mbx_power_limits) {
xe_hwmon_pcode_read_power_limit(hwmon, power_attr, channel, &uval);
ret = (uval & PWR_LIM_EN) ? attr->mode : 0;
} else {
ret = xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT,
channel)) ? attr->mode : 0;
}
xe_pm_runtime_put(hwmon->xe);
@ -604,19 +758,27 @@ xe_hwmon_power_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel)
switch (attr) {
case hwmon_power_max:
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT,
if (hwmon->xe->info.has_mbx_power_limits) {
xe_hwmon_pcode_read_power_limit(hwmon, attr, channel, &uval);
return (uval) ? 0664 : 0;
} else {
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_RAPL_LIMIT,
channel)) ? 0664 : 0;
}
case hwmon_power_rated_max:
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU,
channel)) ? 0444 : 0;
if (hwmon->xe->info.has_mbx_power_limits)
return 0;
else
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU,
channel)) ? 0444 : 0;
case hwmon_power_crit:
if (channel == CHANNEL_PKG)
return (xe_hwmon_pcode_read_i1(hwmon, &uval) ||
!(uval & POWER_SETUP_I1_WATTS)) ? 0 : 0644;
break;
case hwmon_power_label:
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU_UNIT,
channel)) ? 0444 : 0;
if (channel == CHANNEL_PKG) {
xe_hwmon_pcode_read_i1(hwmon, &uval);
return (uval & POWER_SETUP_I1_WATTS) ? (attr == hwmon_power_label) ?
0444 : 0644 : 0;
}
break;
default:
return 0;
}
@ -628,10 +790,10 @@ xe_hwmon_power_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val)
{
switch (attr) {
case hwmon_power_max:
xe_hwmon_power_max_read(hwmon, channel, val);
xe_hwmon_power_max_read(hwmon, attr, channel, val);
return 0;
case hwmon_power_rated_max:
xe_hwmon_power_rated_max_read(hwmon, channel, val);
xe_hwmon_power_rated_max_read(hwmon, attr, channel, val);
return 0;
case hwmon_power_crit:
return xe_hwmon_power_curr_crit_read(hwmon, channel, val, SF_POWER);
@ -645,7 +807,7 @@ xe_hwmon_power_write(struct xe_hwmon *hwmon, u32 attr, int channel, long val)
{
switch (attr) {
case hwmon_power_max:
return xe_hwmon_power_max_write(hwmon, channel, val);
return xe_hwmon_power_max_write(hwmon, attr, channel, val);
case hwmon_power_crit:
return xe_hwmon_power_curr_crit_write(hwmon, channel, val, SF_POWER);
default:
@ -965,18 +1127,42 @@ xe_hwmon_get_preregistration_info(struct xe_hwmon *hwmon)
int channel;
struct xe_reg pkg_power_sku_unit;
/*
* The contents of register PKG_POWER_SKU_UNIT do not change,
* so read it once and store the shift values.
*/
pkg_power_sku_unit = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU_UNIT, 0);
if (xe_reg_is_valid(pkg_power_sku_unit)) {
val_sku_unit = xe_mmio_read32(mmio, pkg_power_sku_unit);
hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit);
hwmon->scl_shift_energy = REG_FIELD_GET(PKG_ENERGY_UNIT, val_sku_unit);
hwmon->scl_shift_time = REG_FIELD_GET(PKG_TIME_UNIT, val_sku_unit);
if (hwmon->xe->info.has_mbx_power_limits) {
/* Check if card firmware support mailbox power limits commands. */
if (xe_hwmon_pcode_read_power_limit(hwmon, PL1_HWMON_ATTR, CHANNEL_CARD,
&hwmon->pl1_on_boot[CHANNEL_CARD]) |
xe_hwmon_pcode_read_power_limit(hwmon, PL1_HWMON_ATTR, CHANNEL_PKG,
&hwmon->pl1_on_boot[CHANNEL_PKG])) {
drm_warn(&hwmon->xe->drm,
"Failed to read power limits, check card firmware !\n");
} else {
drm_info(&hwmon->xe->drm, "Using mailbox commands for power limits\n");
/* Write default limits to read from pcode from now on. */
xe_hwmon_pcode_write_power_limit(hwmon, PL1_HWMON_ATTR,
CHANNEL_CARD,
hwmon->pl1_on_boot[CHANNEL_CARD]);
xe_hwmon_pcode_write_power_limit(hwmon, PL1_HWMON_ATTR,
CHANNEL_PKG,
hwmon->pl1_on_boot[CHANNEL_PKG]);
hwmon->scl_shift_power = PWR_UNIT;
hwmon->scl_shift_energy = ENERGY_UNIT;
hwmon->scl_shift_time = TIME_UNIT;
hwmon->boot_power_limit_read = true;
}
} else {
drm_info(&hwmon->xe->drm, "Using register for power limits\n");
/*
* The contents of register PKG_POWER_SKU_UNIT do not change,
* so read it once and store the shift values.
*/
pkg_power_sku_unit = xe_hwmon_get_reg(hwmon, REG_PKG_POWER_SKU_UNIT, 0);
if (xe_reg_is_valid(pkg_power_sku_unit)) {
val_sku_unit = xe_mmio_read32(mmio, pkg_power_sku_unit);
hwmon->scl_shift_power = REG_FIELD_GET(PKG_PWR_UNIT, val_sku_unit);
hwmon->scl_shift_energy = REG_FIELD_GET(PKG_ENERGY_UNIT, val_sku_unit);
hwmon->scl_shift_time = REG_FIELD_GET(PKG_TIME_UNIT, val_sku_unit);
}
}
/*
* Initialize 'struct xe_hwmon_energy_info', i.e. set fields to the
* first value of the energy register read

5
drivers/gpu/drm/xe/xe_pci.c
View File

@ -66,6 +66,7 @@ struct xe_device_desc {
u8 has_heci_gscfi:1;
u8 has_heci_cscfi:1;
u8 has_llc:1;
u8 has_mbx_power_limits:1;
u8 has_pxp:1;
u8 has_sriov:1;
u8 needs_scratch:1;
@ -305,6 +306,7 @@ static const struct xe_device_desc dg2_desc = {
DG2_FEATURES,
.has_display = true,
.has_fan_control = true,
.has_mbx_power_limits = false,
};
static const __maybe_unused struct xe_device_desc pvc_desc = {
@ -316,6 +318,7 @@ static const __maybe_unused struct xe_device_desc pvc_desc = {
.has_heci_gscfi = 1,
.max_remote_tiles = 1,
.require_force_probe = true,
.has_mbx_power_limits = false,
};
static const struct xe_device_desc mtl_desc = {
@ -341,6 +344,7 @@ static const struct xe_device_desc bmg_desc = {
.dma_mask_size = 46,
.has_display = true,
.has_fan_control = true,
.has_mbx_power_limits = true,
.has_heci_cscfi = 1,
.needs_scratch = true,
};
@ -583,6 +587,7 @@ static int xe_info_init_early(struct xe_device *xe,
xe->info.dma_mask_size = desc->dma_mask_size;
xe->info.is_dgfx = desc->is_dgfx;
xe->info.has_fan_control = desc->has_fan_control;
xe->info.has_mbx_power_limits = desc->has_mbx_power_limits;
xe->info.has_heci_gscfi = desc->has_heci_gscfi;
xe->info.has_heci_cscfi = desc->has_heci_cscfi;
xe->info.has_llc = desc->has_llc;

11
drivers/gpu/drm/xe/xe_pcode.c
View File

@ -109,6 +109,17 @@ int xe_pcode_write_timeout(struct xe_tile *tile, u32 mbox, u32 data, int timeout
return err;
}
int xe_pcode_write64_timeout(struct xe_tile *tile, u32 mbox, u32 data0, u32 data1, int timeout)
{
int err;
mutex_lock(&tile->pcode.lock);
err = pcode_mailbox_rw(tile, mbox, &data0, &data1, timeout, false, false);
mutex_unlock(&tile->pcode.lock);
return err;
}
int xe_pcode_read(struct xe_tile *tile, u32 mbox, u32 *val, u32 *val1)
{
int err;

3
drivers/gpu/drm/xe/xe_pcode.h
View File

@ -18,6 +18,9 @@ int xe_pcode_init_min_freq_table(struct xe_tile *tile, u32 min_gt_freq,
int xe_pcode_read(struct xe_tile *tile, u32 mbox, u32 *val, u32 *val1);
int xe_pcode_write_timeout(struct xe_tile *tile, u32 mbox, u32 val,
int timeout_ms);
int xe_pcode_write64_timeout(struct xe_tile *tile, u32 mbox, u32 data0,
u32 data1, int timeout);
#define xe_pcode_write(tile, mbox, val) \
xe_pcode_write_timeout(tile, mbox, val, 1)

7
drivers/gpu/drm/xe/xe_pcode_api.h
View File

@ -43,6 +43,13 @@
#define POWER_SETUP_I1_SHIFT 6 /* 10.6 fixed point format */
#define POWER_SETUP_I1_DATA_MASK REG_GENMASK(15, 0)
#define READ_PSYSGPU_POWER_LIMIT 0x6
#define WRITE_PSYSGPU_POWER_LIMIT 0x7
#define READ_PACKAGE_POWER_LIMIT 0x8
#define WRITE_PACKAGE_POWER_LIMIT 0x9
#define READ_PL_FROM_FW 0x1
#define READ_PL_FROM_PCODE 0x0
#define PCODE_FREQUENCY_CONFIG 0x6e
/* Frequency Config Sub Commands (param1) */
#define PCODE_MBOX_FC_SC_READ_FUSED_P0 0x0