diff options
Diffstat (limited to 'drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c')
-rw-r--r-- | drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c b/drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c new file mode 100644 index 000000000000..6dd2c2a1cd70 --- /dev/null +++ b/drivers/misc/habanalabs/gaudi/gaudi_hwmgr.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright 2016-2018 HabanaLabs, Ltd. + * All Rights Reserved. + */ + +#include "gaudiP.h" +#include "include/gaudi/gaudi_fw_if.h" + +void gaudi_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq) +{ + struct gaudi_device *gaudi = hdev->asic_specific; + + if (freq == PLL_LAST) + hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value); +} + +int gaudi_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk) +{ + long value; + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + value = hl_get_frequency(hdev, MME_PLL, false); + + if (value < 0) { + dev_err(hdev->dev, "Failed to retrieve device max clock %ld\n", + value); + return value; + } + + *max_clk = (value / 1000 / 1000); + + value = hl_get_frequency(hdev, MME_PLL, true); + + if (value < 0) { + dev_err(hdev->dev, + "Failed to retrieve device current clock %ld\n", + value); + return value; + } + + *cur_clk = (value / 1000 / 1000); + + return 0; +} + +static ssize_t clk_max_freq_mhz_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + struct gaudi_device *gaudi = hdev->asic_specific; + long value; + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + value = hl_get_frequency(hdev, MME_PLL, false); + + gaudi->max_freq_value = value; + + return sprintf(buf, "%lu\n", (value / 1000 / 1000)); +} + +static ssize_t clk_max_freq_mhz_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + struct gaudi_device *gaudi = hdev->asic_specific; + int rc; + u64 value; + + if (hl_device_disabled_or_in_reset(hdev)) { + count = -ENODEV; + goto fail; + } + + rc = kstrtoull(buf, 0, &value); + if (rc) { + count = -EINVAL; + goto fail; + } + + gaudi->max_freq_value = value * 1000 * 1000; + + hl_set_frequency(hdev, MME_PLL, gaudi->max_freq_value); + +fail: + return count; +} + +static ssize_t clk_cur_freq_mhz_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hl_device *hdev = dev_get_drvdata(dev); + long value; + + if (hl_device_disabled_or_in_reset(hdev)) + return -ENODEV; + + value = hl_get_frequency(hdev, MME_PLL, true); + + return sprintf(buf, "%lu\n", (value / 1000 / 1000)); +} + +static DEVICE_ATTR_RW(clk_max_freq_mhz); +static DEVICE_ATTR_RO(clk_cur_freq_mhz); + +static struct attribute *gaudi_dev_attrs[] = { + &dev_attr_clk_max_freq_mhz.attr, + &dev_attr_clk_cur_freq_mhz.attr, + NULL, +}; + +void gaudi_add_device_attr(struct hl_device *hdev, + struct attribute_group *dev_attr_grp) +{ + dev_attr_grp->attrs = gaudi_dev_attrs; +} |