diff options
author | Oded Gabbay <oded.gabbay@gmail.com> | 2019-10-10 15:48:59 +0300 |
---|---|---|
committer | Oded Gabbay <oded.gabbay@gmail.com> | 2019-11-21 11:35:45 +0200 |
commit | 62c1e124a9e03ccb8bb39efe1d092c2376967528 (patch) | |
tree | c6fc20d051587eb6f10a3698467bcb58548d39ac /drivers/misc/habanalabs | |
parent | 8fdacf2a530f36f6f0621a95ef0e37d8db2d2f89 (diff) |
habanalabs: add opcode to INFO IOCTL to return clock rate
Add a new opcode to the INFO IOCTL to allow the user application to
retrieve the ASIC's current and maximum clock rate. The rate is
returned in MHz.
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Reviewed-by: Tomer Tayar <ttayar@habana.ai>
Diffstat (limited to 'drivers/misc/habanalabs')
-rw-r--r-- | drivers/misc/habanalabs/goya/goya.c | 3 | ||||
-rw-r--r-- | drivers/misc/habanalabs/goya/goyaP.h | 2 | ||||
-rw-r--r-- | drivers/misc/habanalabs/goya/goya_hwmgr.c | 31 | ||||
-rw-r--r-- | drivers/misc/habanalabs/habanalabs.h | 2 | ||||
-rw-r--r-- | drivers/misc/habanalabs/habanalabs_ioctl.c | 23 |
5 files changed, 60 insertions, 1 deletions
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c index d49f5ecd903b..ac574d18c139 100644 --- a/drivers/misc/habanalabs/goya/goya.c +++ b/drivers/misc/habanalabs/goya/goya.c @@ -5148,7 +5148,8 @@ static const struct hl_asic_funcs goya_funcs = { .init_iatu = goya_init_iatu, .rreg = hl_rreg, .wreg = hl_wreg, - .halt_coresight = goya_halt_coresight + .halt_coresight = goya_halt_coresight, + .get_clk_rate = goya_get_clk_rate }; /* diff --git a/drivers/misc/habanalabs/goya/goyaP.h b/drivers/misc/habanalabs/goya/goyaP.h index 89b6574f8e4f..c3230cb6e25c 100644 --- a/drivers/misc/habanalabs/goya/goyaP.h +++ b/drivers/misc/habanalabs/goya/goyaP.h @@ -233,4 +233,6 @@ void goya_cpu_accessible_dma_pool_free(struct hl_device *hdev, size_t size, void *vaddr); void goya_mmu_remove_device_cpu_mappings(struct hl_device *hdev); +int goya_get_clk_rate(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk); + #endif /* GOYAP_H_ */ diff --git a/drivers/misc/habanalabs/goya/goya_hwmgr.c b/drivers/misc/habanalabs/goya/goya_hwmgr.c index a2a700c3d597..b2ebc01e27f4 100644 --- a/drivers/misc/habanalabs/goya/goya_hwmgr.c +++ b/drivers/misc/habanalabs/goya/goya_hwmgr.c @@ -32,6 +32,37 @@ void goya_set_pll_profile(struct hl_device *hdev, enum hl_pll_frequency freq) } } +int goya_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 mme_clk_show(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h index 91445371b08b..4ff2da859653 100644 --- a/drivers/misc/habanalabs/habanalabs.h +++ b/drivers/misc/habanalabs/habanalabs.h @@ -508,6 +508,7 @@ enum hl_pll_frequency { * @rreg: Read a register. Needed for simulator support. * @wreg: Write a register. Needed for simulator support. * @halt_coresight: stop the ETF and ETR traces. + * @get_clk_rate: Retrieve the ASIC current and maximum clock rate in MHz */ struct hl_asic_funcs { int (*early_init)(struct hl_device *hdev); @@ -590,6 +591,7 @@ struct hl_asic_funcs { u32 (*rreg)(struct hl_device *hdev, u32 reg); void (*wreg)(struct hl_device *hdev, u32 reg, u32 val); void (*halt_coresight)(struct hl_device *hdev); + int (*get_clk_rate)(struct hl_device *hdev, u32 *cur_clk, u32 *max_clk); }; diff --git a/drivers/misc/habanalabs/habanalabs_ioctl.c b/drivers/misc/habanalabs/habanalabs_ioctl.c index 66d9c710073c..cd4b5a9ceac1 100644 --- a/drivers/misc/habanalabs/habanalabs_ioctl.c +++ b/drivers/misc/habanalabs/habanalabs_ioctl.c @@ -221,6 +221,25 @@ static int device_utilization(struct hl_device *hdev, struct hl_info_args *args) min((size_t) max_size, sizeof(device_util))) ? -EFAULT : 0; } +static int get_clk_rate(struct hl_device *hdev, struct hl_info_args *args) +{ + struct hl_info_clk_rate clk_rate = {0}; + u32 max_size = args->return_size; + void __user *out = (void __user *) (uintptr_t) args->return_pointer; + int rc; + + if ((!max_size) || (!out)) + return -EINVAL; + + rc = hdev->asic_funcs->get_clk_rate(hdev, &clk_rate.cur_clk_rate_mhz, + &clk_rate.max_clk_rate_mhz); + if (rc) + return rc; + + return copy_to_user(out, &clk_rate, + min((size_t) max_size, sizeof(clk_rate))) ? -EFAULT : 0; +} + static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data, struct device *dev) { @@ -271,6 +290,10 @@ static int _hl_info_ioctl(struct hl_fpriv *hpriv, void *data, rc = hw_events_info(hdev, true, args); break; + case HL_INFO_CLK_RATE: + rc = get_clk_rate(hdev, args); + break; + default: dev_err(dev, "Invalid request %d\n", args->op); rc = -ENOTTY; |