diff options
Diffstat (limited to 'drivers/accel/amdxdna/aie2_smu.c')
| -rw-r--r-- | drivers/accel/amdxdna/aie2_smu.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/drivers/accel/amdxdna/aie2_smu.c b/drivers/accel/amdxdna/aie2_smu.c new file mode 100644 index 000000000000..bd94ee96c2bc --- /dev/null +++ b/drivers/accel/amdxdna/aie2_smu.c @@ -0,0 +1,177 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2022-2024, Advanced Micro Devices, Inc. + */ + +#include <drm/drm_device.h> +#include <drm/drm_gem_shmem_helper.h> +#include <drm/drm_print.h> +#include <drm/gpu_scheduler.h> +#include <linux/iopoll.h> + +#include "aie2_pci.h" +#include "amdxdna_pci_drv.h" +#include "amdxdna_pm.h" + +#define SMU_RESULT_OK 1 + +/* SMU commands */ +#define AIE2_SMU_POWER_ON 0x3 +#define AIE2_SMU_POWER_OFF 0x4 +#define AIE2_SMU_SET_MPNPUCLK_FREQ 0x5 +#define AIE2_SMU_SET_HCLK_FREQ 0x6 +#define AIE2_SMU_SET_SOFT_DPMLEVEL 0x7 +#define AIE2_SMU_SET_HARD_DPMLEVEL 0x8 + +#define NPU4_DPM_TOPS(ndev, dpm_level) \ +({ \ + typeof(ndev) _ndev = ndev; \ + (4096 * (_ndev)->total_col * \ + (_ndev)->priv->dpm_clk_tbl[dpm_level].hclk / 1000000); \ +}) + +static int aie2_smu_exec(struct amdxdna_dev_hdl *ndev, u32 reg_cmd, + u32 reg_arg, u32 *out) +{ + u32 resp; + int ret; + + writel(0, SMU_REG(ndev, SMU_RESP_REG)); + writel(reg_arg, SMU_REG(ndev, SMU_ARG_REG)); + writel(reg_cmd, SMU_REG(ndev, SMU_CMD_REG)); + + /* Clear and set SMU_INTR_REG to kick off */ + writel(0, SMU_REG(ndev, SMU_INTR_REG)); + writel(1, SMU_REG(ndev, SMU_INTR_REG)); + + ret = readx_poll_timeout(readl, SMU_REG(ndev, SMU_RESP_REG), resp, + resp, AIE2_INTERVAL, AIE2_TIMEOUT); + if (ret) { + XDNA_ERR(ndev->xdna, "smu cmd %d timed out", reg_cmd); + return ret; + } + + if (out) + *out = readl(SMU_REG(ndev, SMU_OUT_REG)); + + if (resp != SMU_RESULT_OK) { + XDNA_ERR(ndev->xdna, "smu cmd %d failed, 0x%x", reg_cmd, resp); + return -EINVAL; + } + + return 0; +} + +int npu1_set_dpm(struct amdxdna_dev_hdl *ndev, u32 dpm_level) +{ + u32 freq; + int ret; + + ret = amdxdna_pm_resume_get(ndev->xdna); + if (ret) + return ret; + + ret = aie2_smu_exec(ndev, AIE2_SMU_SET_MPNPUCLK_FREQ, + ndev->priv->dpm_clk_tbl[dpm_level].npuclk, &freq); + if (ret) { + XDNA_ERR(ndev->xdna, "Set npu clock to %d failed, ret %d\n", + ndev->priv->dpm_clk_tbl[dpm_level].npuclk, ret); + goto suspend_put; + } + ndev->npuclk_freq = freq; + + ret = aie2_smu_exec(ndev, AIE2_SMU_SET_HCLK_FREQ, + ndev->priv->dpm_clk_tbl[dpm_level].hclk, &freq); + if (ret) { + XDNA_ERR(ndev->xdna, "Set h clock to %d failed, ret %d\n", + ndev->priv->dpm_clk_tbl[dpm_level].hclk, ret); + goto suspend_put; + } + + amdxdna_pm_suspend_put(ndev->xdna); + ndev->hclk_freq = freq; + ndev->dpm_level = dpm_level; + ndev->max_tops = 2 * ndev->total_col; + ndev->curr_tops = ndev->max_tops * freq / 1028; + + XDNA_DBG(ndev->xdna, "MP-NPU clock %d, H clock %d\n", + ndev->npuclk_freq, ndev->hclk_freq); + + return 0; + +suspend_put: + amdxdna_pm_suspend_put(ndev->xdna); + return ret; +} + +int npu4_set_dpm(struct amdxdna_dev_hdl *ndev, u32 dpm_level) +{ + int ret; + + ret = amdxdna_pm_resume_get(ndev->xdna); + if (ret) + return ret; + + ret = aie2_smu_exec(ndev, AIE2_SMU_SET_HARD_DPMLEVEL, dpm_level, NULL); + if (ret) { + XDNA_ERR(ndev->xdna, "Set hard dpm level %d failed, ret %d ", + dpm_level, ret); + goto suspend_put; + } + + ret = aie2_smu_exec(ndev, AIE2_SMU_SET_SOFT_DPMLEVEL, dpm_level, NULL); + if (ret) { + XDNA_ERR(ndev->xdna, "Set soft dpm level %d failed, ret %d", + dpm_level, ret); + goto suspend_put; + } + + amdxdna_pm_suspend_put(ndev->xdna); + ndev->npuclk_freq = ndev->priv->dpm_clk_tbl[dpm_level].npuclk; + ndev->hclk_freq = ndev->priv->dpm_clk_tbl[dpm_level].hclk; + ndev->dpm_level = dpm_level; + ndev->max_tops = NPU4_DPM_TOPS(ndev, ndev->max_dpm_level); + ndev->curr_tops = NPU4_DPM_TOPS(ndev, dpm_level); + + XDNA_DBG(ndev->xdna, "MP-NPU clock %d, H clock %d\n", + ndev->npuclk_freq, ndev->hclk_freq); + + return 0; + +suspend_put: + amdxdna_pm_suspend_put(ndev->xdna); + return ret; +} + +int aie2_smu_init(struct amdxdna_dev_hdl *ndev) +{ + int ret; + + /* + * Failing to set power off indicates an unrecoverable hardware or + * firmware error. + */ + ret = aie2_smu_exec(ndev, AIE2_SMU_POWER_OFF, 0, NULL); + if (ret) { + XDNA_ERR(ndev->xdna, "Access power failed, ret %d", ret); + return ret; + } + + ret = aie2_smu_exec(ndev, AIE2_SMU_POWER_ON, 0, NULL); + if (ret) { + XDNA_ERR(ndev->xdna, "Power on failed, ret %d", ret); + return ret; + } + + return 0; +} + +void aie2_smu_fini(struct amdxdna_dev_hdl *ndev) +{ + int ret; + + ndev->priv->hw_ops.set_dpm(ndev, 0); + ret = aie2_smu_exec(ndev, AIE2_SMU_POWER_OFF, 0, NULL); + if (ret) + XDNA_ERR(ndev->xdna, "Power off failed, ret %d", ret); +} |