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| 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/habanalabs_ioctl.c | |
| parent | 8fdacf2a530f36f6f0621a95ef0e37d8db2d2f89 (diff) | |
| download | lwn-62c1e124a9e03ccb8bb39efe1d092c2376967528.tar.gz lwn-62c1e124a9e03ccb8bb39efe1d092c2376967528.zip | |
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/habanalabs_ioctl.c')
| -rw-r--r-- | drivers/misc/habanalabs/habanalabs_ioctl.c | 23 |
1 files changed, 23 insertions, 0 deletions
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; |