[Intel-gfx] [PATCH intel-gpu-tools] tools: Added intel_dpio_read and intel_dpio_write

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On 2012-08-02 05:07, Vijay Purushothaman wrote:
> In Valleyview the DPLL and lane control registers are accessible only
> through side band fabric called DPIO. Added two tools to read and 
> write
> registers residing in this space.

Could I convince you to use the centralized read/write mmio functions?
Otherwise, everything seems fine to me here.

>
> Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman at intel.com>
> ---
>  tools/Makefile.am        |    2 +
>  tools/intel_dpio_read.c  |  105
> ++++++++++++++++++++++++++++++++++++++++++++++
>  tools/intel_dpio_write.c |  103
> +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 210 insertions(+)
>  create mode 100644 tools/intel_dpio_read.c
>  create mode 100644 tools/intel_dpio_write.c
>
> diff --git a/tools/Makefile.am b/tools/Makefile.am
> index d461f38..71fb087 100644
> --- a/tools/Makefile.am
> +++ b/tools/Makefile.am
> @@ -15,6 +15,8 @@ bin_PROGRAMS = 				\
>  	intel_reg_write 		\
>  	intel_reg_read 			\
>  	intel_forcewaked		\
> +	intel_dpio_read			\
> +	intel_dpio_write		\
>  	intel_l3_parity
>
>  noinst_PROGRAMS = 			\
> diff --git a/tools/intel_dpio_read.c b/tools/intel_dpio_read.c
> new file mode 100644
> index 0000000..8b924fd
> --- /dev/null
> +++ b/tools/intel_dpio_read.c
> @@ -0,0 +1,105 @@
> +/*
> + * Copyright ? 2012 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person 
> obtaining a
> + * copy of this software and associated documentation files (the
> "Software"),
> + * to deal in the Software without restriction, including without 
> limitation
> + * the rights to use, copy, modify, merge, publish, distribute, 
> sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom 
> the
> + * Software is furnished to do so, subject to the following 
> conditions:
> + *
> + * The above copyright notice and this permission notice (including 
> the next
> + * paragraph) shall be included in all copies or substantial 
> portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
> MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO 
> EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
> OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
> ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
> OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Authors:
> + *		Vijay Purushothaman <vijay.a.purushothaman at intel.com>
> + *
> + */
> +
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <err.h>
> +#include <string.h>
> +#include "intel_gpu_tools.h"
> +
> +#define VLV_DISPLAY_BASE		0x180000
> +#define DPIO_PKT				0x2100
> +#define  DPIO_RID				(0 << 24)
> +#define  DPIO_OP_WRITE			(1 << 16)
> +#define  DPIO_OP_READ			(0 << 16)
> +#define  DPIO_PORTID			(0x12 << 8)
> +#define  DPIO_BYTE				(0xf << 4)
> +#define  DPIO_BUSY				(1 << 0)
> +#define DPIO_DATA				0x2104
> +#define DPIO_REG				0x2108
> +
> +static uint32_t vlv_display_reg_read(uint32_t reg)
> +{
> +	reg += VLV_DISPLAY_BASE;
> +	return (*(volatile uint32_t *)((volatile char*)mmio + reg));
> +}
> +
> +static void vlv_display_reg_write(uint32_t reg, uint32_t val)
> +{
> +	volatile uint32_t *ptr;
> +
> +	reg += VLV_DISPLAY_BASE;
> +	ptr = (volatile uint32_t *)((volatile char *) mmio + reg);
> +	*ptr = val;
> +}
> +
> +static void usage(char *cmdname)
> +{
> +	printf("Warning : This program will work only on Valleyview\n");
> +	printf("Usage: %s [addr]\n", cmdname);
> +	printf("\t addr : in 0xXXXX format\n");
> +}
> +
> +int main(int argc, char** argv)
> +{
> +	int ret = 0;
> +	uint32_t reg, val;
> +	char *cmdname = strdup(argv[0]);
> +
> +	if (argc != 2) {
> +		usage(cmdname);
> +		ret = 1;
> +		goto out;
> +	}
> +
> +	sscanf(argv[1], "0x%x", &reg);
> +
> +	intel_register_access_init(intel_get_pci_device(), 0);
> +
> +	/* Check whether the side band fabric is ready to accept commands 
> */
> +	do {
> +		usleep(1);
> +	} while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
> +
> +	vlv_display_reg_write(DPIO_REG, reg);
> +	vlv_display_reg_write(DPIO_PKT, DPIO_RID | DPIO_OP_READ | 
> DPIO_PORTID |
> +							DPIO_BYTE);
> +	do {
> +		usleep(1);
> +	} while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
> +
> +	val = vlv_display_reg_read(DPIO_DATA);
> +
> +	printf("Read DPIO register: 0x%x - Value : 0x%x\n", reg, val);
> +
> +	intel_register_access_fini();
> +
> +out:
> +	free(cmdname);
> +	return ret;
> +}
> diff --git a/tools/intel_dpio_write.c b/tools/intel_dpio_write.c
> new file mode 100644
> index 0000000..96b72dd
> --- /dev/null
> +++ b/tools/intel_dpio_write.c
> @@ -0,0 +1,103 @@
> +/*
> + * Copyright ? 2012 Intel Corporation
> + *
> + * Permission is hereby granted, free of charge, to any person 
> obtaining a
> + * copy of this software and associated documentation files (the
> "Software"),
> + * to deal in the Software without restriction, including without 
> limitation
> + * the rights to use, copy, modify, merge, publish, distribute, 
> sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom 
> the
> + * Software is furnished to do so, subject to the following 
> conditions:
> + *
> + * The above copyright notice and this permission notice (including 
> the next
> + * paragraph) shall be included in all copies or substantial 
> portions of the
> + * Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
> MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO 
> EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
> OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
> ARISING
> + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 
> OTHER
> + * DEALINGS IN THE SOFTWARE.
> + *
> + * Authors:
> + *		Vijay Purushothaman <vijay.a.purushothaman at intel.com>
> + *
> + */
> +
> +#include <unistd.h>
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <err.h>
> +#include <string.h>
> +#include "intel_gpu_tools.h"
> +
> +#define VLV_DISPLAY_BASE		0x180000
> +#define DPIO_PKT				0x2100
> +#define  DPIO_RID				(0 << 24)
> +#define  DPIO_OP_WRITE			(1 << 16)
> +#define  DPIO_OP_READ			(0 << 16)
> +#define  DPIO_PORTID			(0x12 << 8)
> +#define  DPIO_BYTE				(0xf << 4)
> +#define  DPIO_BUSY				(1 << 0)
> +#define DPIO_DATA				0x2104
> +#define DPIO_REG				0x2108
> +
> +static uint32_t vlv_display_reg_read(uint32_t reg)
> +{
> +	reg += VLV_DISPLAY_BASE;
> +	return (*(volatile uint32_t *)((volatile char*)mmio + reg));
> +}
> +
> +static void vlv_display_reg_write(uint32_t reg, uint32_t val)
> +{
> +	volatile uint32_t *ptr;
> +
> +	reg += VLV_DISPLAY_BASE;
> +	ptr = (volatile uint32_t *)((volatile char *) mmio + reg);
> +	*ptr = val;
> +}
> +
> +static void usage(char *cmdname)
> +{
> +	printf("Warning : This program will work only on Valleyview\n");
> +	printf("Usage: %s [addr] [val]\n", cmdname);
> +	printf("\t addr : in 0xXXXX format\n");
> +}
> +
> +int main(int argc, char** argv)
> +{
> +	int ret = 0;
> +	uint32_t reg, val;
> +	char *cmdname = strdup(argv[0]);
> +
> +	if (argc != 3) {
> +		usage(cmdname);
> +		ret = 1;
> +		goto out;
> +	}
> +
> +	sscanf(argv[1], "0x%x", &reg);
> +	sscanf(argv[2], "0x%x", &val);
> +
> +	intel_register_access_init(intel_get_pci_device(), 0);
> +
> +	/* Check whether the side band fabric is ready to accept commands 
> */
> +	do {
> +		usleep(1);
> +	} while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
> +
> +	vlv_display_reg_write(DPIO_DATA, val);
> +	vlv_display_reg_write(DPIO_REG, reg);
> +	vlv_display_reg_write(DPIO_PKT, DPIO_RID | DPIO_OP_WRITE | 
> DPIO_PORTID |
> +							DPIO_BYTE);
> +	do {
> +		usleep(1);
> +	} while (vlv_display_reg_read(DPIO_PKT) & DPIO_BUSY);
> +
> +	intel_register_access_fini();
> +
> +out:
> +	free(cmdname);
> +	return ret;
> +}



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