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

[Vijay Purushothaman <vijay.a.purushothaman@intel.com>]

On Thu, 2 Aug 2012 09:06:48 -0700
Ben Widawsky <ben@bwidawsk.net> wrote:

> 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.
> 
Sure. I will move these read, write functions to intel_reg_read &
intel_reg_write.

Thanks,
Vijay

> >
> > Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@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@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@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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