Commit 9c916549 authored by Chakravarty, Souvik K's avatar Chakravarty, Souvik K Committed by Andy Shevchenko
Browse files

platform/x86: intel_pmc_ipc: Add read64 API 



Add intel_pmc_gcr_read64() API for reading from 64-bit GCR registers.
This API will be called from intel_telemetry. Update description of
intel_pmc_gcr_read().

Signed-off-by: default avatarSouvik Kumar Chakravarty <souvik.k.chakravarty@intel.com>
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
parent 2448f44f

arch/x86/include/asm/intel_pmc_ipc.h

+6 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ int intel_pmc_ipc_command(u32 cmd, u32 sub, u8 *in, u32 inlen, 
		u32 *out, u32 outlen);

int intel_pmc_s0ix_counter_read(u64 *data);

int intel_pmc_gcr_read(u32 offset, u32 *data);

int intel_pmc_gcr_read64(u32 offset, u64 *data);

int intel_pmc_gcr_write(u32 offset, u32 data);

int intel_pmc_gcr_update(u32 offset, u32 mask, u32 val);
@@ -70,6 +71,11 @@ static inline int intel_pmc_gcr_read(u32 offset, u32 *data) 
	return -EINVAL;

}



static inline int intel_pmc_gcr_read64(u32 offset, u64 *data)

{

	return -EINVAL;

}



static inline int intel_pmc_gcr_write(u32 offset, u32 data)

{

	return -EINVAL;

drivers/platform/x86/intel_pmc_ipc.c

+31 −2
Original line number Diff line number Diff line
@@ -215,11 +215,11 @@ static inline int is_gcr_valid(u32 offset) 
}



/**

 * intel_pmc_gcr_read() - Read PMC GCR register

 * intel_pmc_gcr_read() - Read a 32-bit PMC GCR register

 * @offset:	offset of GCR register from GCR address base

 * @data:	data pointer for storing the register output

 *

 * Reads the PMC GCR register of given offset.

 * Reads the 32-bit PMC GCR register at given offset.

 *

 * Return:	negative value on error or 0 on success.

 */
@@ -243,6 +243,35 @@ int intel_pmc_gcr_read(u32 offset, u32 *data) 
}

EXPORT_SYMBOL_GPL(intel_pmc_gcr_read);



/**

 * intel_pmc_gcr_read64() - Read a 64-bit PMC GCR register

 * @offset:	offset of GCR register from GCR address base

 * @data:	data pointer for storing the register output

 *

 * Reads the 64-bit PMC GCR register at given offset.

 *

 * Return:	negative value on error or 0 on success.

 */

int intel_pmc_gcr_read64(u32 offset, u64 *data)

{

	int ret;



	spin_lock(&ipcdev.gcr_lock);



	ret = is_gcr_valid(offset);

	if (ret < 0) {

		spin_unlock(&ipcdev.gcr_lock);

		return ret;

	}



	*data = readq(ipcdev.gcr_mem_base + offset);



	spin_unlock(&ipcdev.gcr_lock);



	return 0;

}

EXPORT_SYMBOL_GPL(intel_pmc_gcr_read64);



/**

 * intel_pmc_gcr_write() - Write PMC GCR register

 * @offset:	offset of GCR register from GCR address base

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