Re: [IGT PATCH 1/2] intel_opregion_decode: new tool for decoding graphics opregion

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On Tue, Oct 8, 2013 at 3:18 PM, Jani Nikula <jani.nikula@xxxxxxxxx> wrote:
> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
>  tools/Makefile.am             |    1 +
>  tools/intel_opregion_decode.c |  438 +++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 439 insertions(+)
>  create mode 100644 tools/intel_opregion_decode.c
>
> diff --git a/tools/Makefile.am b/tools/Makefile.am
> index 19810cf..59fea97 100644
> --- a/tools/Makefile.am
> +++ b/tools/Makefile.am
> @@ -13,6 +13,7 @@ bin_PROGRAMS =                                \
>         intel_gpu_top                   \
>         intel_gpu_time                  \
>         intel_gtt                       \
> +       intel_opregion_decode           \
>         intel_perf_counters             \
>         intel_stepping                  \
>         intel_reg_checker               \
> diff --git a/tools/intel_opregion_decode.c b/tools/intel_opregion_decode.c
> new file mode 100644
> index 0000000..e5f79df
> --- /dev/null
> +++ b/tools/intel_opregion_decode.c
> @@ -0,0 +1,438 @@
> +/*
> + * Copyright © 2013 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:
> + *    Jani Nikula <jani.nikula@xxxxxxxxx>
> + *
> + */
> +
> +#include <errno.h>
> +#include <fcntl.h>
> +#include <getopt.h>
> +#include <stdint.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <unistd.h>
> +#include <sys/mman.h>
> +#include <sys/stat.h>
> +#include <sys/types.h>
> +
> +#include "intel_gpu_tools.h"
> +
> +#define OPREGION_HEADER_OFFSET         0
> +#define OPREGION_ACPI_OFFSET           0x100
> +#define OPREGION_SWSCI_OFFSET          0x200
> +#define OPREGION_ASLE_OFFSET           0x300
> +#define OPREGION_VBT_OFFSET            0x400
> +#define OPREGION_ASLE_EXT_OFFSET       0x1C00
> +
> +#define MBOX_ACPI      (1 << 0)
> +#define MBOX_SWSCI     (1 << 1)
> +#define MBOX_ASLE      (1 << 2)
> +#define MBOX_VBT       (1 << 3)
> +#define MBOX_ASLE_EXT  (1 << 4)
> +
> +struct opregion_header {
> +       char sign[16];
> +       uint32_t size;
> +       uint32_t over;
> +       char sver[32];
> +       char vver[16];
> +       char gver[16];
> +       uint32_t mbox;
> +       uint32_t dmod;
> +       uint32_t pcon;
> +       char dver[32];
> +       uint8_t rsv1[124];
> +} __attribute__((packed));
> +
> +/* OpRegion mailbox #1: public ACPI methods */
> +struct opregion_acpi {
> +       uint32_t drdy;          /* driver readiness */
> +       uint32_t csts;          /* notification status */
> +       uint32_t cevt;          /* current event */
> +       uint8_t rsvd1[20];
> +       uint32_t didl[8];       /* supported display devices ID list */
> +       uint32_t cpdl[8];       /* currently presented display list */
> +       uint32_t cadl[8];       /* currently active display list */
> +       uint32_t nadl[8];       /* next active devices list */
> +       uint32_t aslp;          /* ASL sleep time-out */
> +       uint32_t tidx;          /* toggle table index */
> +       uint32_t chpd;          /* current hotplug enable indicator */
> +       uint32_t clid;          /* current lid state*/
> +       uint32_t cdck;          /* current docking state */
> +       uint32_t sxsw;          /* Sx state resume */
> +       uint32_t evts;          /* ASL supported events */
> +       uint32_t cnot;          /* current OS notification */
> +       uint32_t nrdy;          /* driver status */
> +       uint32_t did2[7];
> +       uint32_t cpd2[7];
> +       uint8_t rsvd2[4];
> +} __attribute__((packed));
> +
> +/* OpRegion mailbox #2: SWSCI */
> +struct opregion_swsci {
> +       uint32_t scic;          /* SWSCI command|status|data */
> +       uint32_t parm;          /* command parameters */
> +       uint32_t dslp;          /* driver sleep time-out */
> +       uint8_t rsvd[244];

spec that I have here (HSW one) says 240 reserved.

with that fixed or explained I'll add my rv-b tag and merge all 6
patches (including bios reader ones that I already reviewed) upstream.

> +} __attribute__((packed));
> +
> +/* OpRegion mailbox #3: ASLE */
> +struct opregion_asle {
> +       uint32_t ardy;          /* driver readiness */
> +       uint32_t aslc;          /* ASLE interrupt command */
> +       uint32_t tche;          /* technology enabled indicator */
> +       uint32_t alsi;          /* current ALS illuminance reading */
> +       uint32_t bclp;          /* backlight brightness to set */
> +       uint32_t pfit;          /* panel fitting state */
> +       uint32_t cblv;          /* current brightness level */
> +       uint16_t bclm[20];      /* backlight level duty cycle mapping table */
> +       uint32_t cpfm;          /* current panel fitting mode */
> +       uint32_t epfm;          /* enabled panel fitting modes */
> +       uint8_t plut_header;    /* panel LUT and identifier */
> +       uint8_t plut_identifier[10];    /* panel LUT and identifier */
> +       uint8_t plut[63];       /* panel LUT and identifier */
> +       uint32_t pfmb;          /* PWM freq and min brightness */
> +       uint32_t ccdv;
> +       uint32_t pcft;
> +       uint32_t srot;
> +       uint32_t iuer;
> +       uint8_t fdss[8];
> +       uint32_t fdsp;
> +       uint32_t stat;
> +       uint8_t rsvd[86];
> +} __attribute__((packed));
> +
> +/* OpRegion mailbox #4: VBT */
> +struct opregion_vbt {
> +       char product_string[20];
> +       /* rest ignored */
> +} __attribute__((packed));
> +
> +/* OpRegion mailbox #5: ASLE extension */
> +struct opregion_asle_ext {
> +       uint32_t phed;
> +       uint8_t bddc[256];
> +} __attribute__((packed));
> +
> +static uint32_t decode_header(const void *buffer)
> +{
> +       const struct opregion_header *header = buffer;
> +       char *s;
> +
> +       if (strncmp("IntelGraphicsMem", header->sign, sizeof(header->sign))) {
> +               fprintf(stderr, "invalid opregion signature\n");
> +               return 0;
> +       }
> +
> +       printf("OpRegion Header:\n");
> +
> +       s = strndup(header->sign, sizeof(header->sign));
> +       printf("\tsign:\t%s\n", s);
> +       free(s);
> +
> +       printf("\tsize:\t0x%08x\n", header->size);
> +       printf("\tover:\t0x%08x\n", header->over);
> +
> +       s = strndup(header->sver, sizeof(header->sver));
> +       printf("\tsver:\t%s\n", s);
> +       free(s);
> +
> +       s = strndup(header->vver, sizeof(header->vver));
> +       printf("\tvver:\t%s\n", s);
> +       free(s);
> +
> +       s = strndup(header->gver, sizeof(header->gver));
> +       printf("\tgver:\t%s\n", s);
> +       free(s);
> +
> +       printf("\tmbox:\t0x%08x\n", header->mbox);
> +
> +       printf("\tdmod:\t0x%08x\n", header->dmod);
> +       printf("\tpcon:\t0x%08x\n", header->pcon);
> +
> +       s = strndup(header->dver, sizeof(header->dver));
> +       printf("\tdver:\t%s\n", s);
> +       free(s);
> +
> +       printf("\n");
> +
> +       return header->mbox;
> +}
> +
> +static void decode_acpi(const void *buffer)
> +{
> +       const struct opregion_acpi *acpi = buffer;
> +       int i;
> +
> +       printf("OpRegion Mailbox 1: Public ACPI Methods:\n");
> +
> +       printf("\tdrdy:\t0x%08x\n", acpi->drdy);
> +       printf("\tcsts:\t0x%08x\n", acpi->csts);
> +       printf("\tcevt:\t0x%08x\n", acpi->cevt);
> +
> +       printf("\tdidl:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->didl); i++)
> +               printf("\t\tdidl[%d]:\t0x%08x\n", i, acpi->didl[i]);
> +
> +       printf("\tcpdl:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->cpdl); i++)
> +               printf("\t\tcpdl[%d]:\t0x%08x\n", i, acpi->cpdl[i]);
> +
> +       printf("\tcadl:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->cadl); i++)
> +               printf("\t\tcadl[%d]:\t0x%08x\n", i, acpi->cadl[i]);
> +
> +       printf("\tnadl:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->nadl); i++)
> +               printf("\t\tnadl[%d]:\t0x%08x\n", i, acpi->nadl[i]);
> +
> +       printf("\taslp:\t0x%08x\n", acpi->aslp);
> +       printf("\ttidx:\t0x%08x\n", acpi->tidx);
> +       printf("\tchpd:\t0x%08x\n", acpi->chpd);
> +       printf("\tclid:\t0x%08x\n", acpi->clid);
> +       printf("\tcdck:\t0x%08x\n", acpi->cdck);
> +       printf("\tsxsw:\t0x%08x\n", acpi->sxsw);
> +       printf("\tevts:\t0x%08x\n", acpi->evts);
> +       printf("\tcnot:\t0x%08x\n", acpi->cnot);
> +       printf("\tnrdy:\t0x%08x\n", acpi->nrdy);
> +
> +       printf("\tdid2:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->did2); i++)
> +               printf("\t\tdid2[%d]:\t0x%08x\n", i, acpi->did2[i]);
> +
> +       printf("\tcpd2:\n");
> +       for (i = 0; i < ARRAY_SIZE(acpi->cpd2); i++)
> +               printf("\t\tcpd2[%d]:\t0x%08x\n", i, acpi->cpd2[i]);
> +
> +       printf("\n");
> +}
> +
> +static void decode_swsci(const void *buffer)
> +{
> +       const struct opregion_swsci *swsci = buffer;
> +
> +       printf("OpRegion Mailbox 2: Software SCI Interface (SWSCI):\n");
> +
> +       printf("\tscic:\t0x%08x\n", swsci->scic);
> +       printf("\tparm:\t0x%08x\n", swsci->parm);
> +       printf("\tdslp:\t0x%08x\n", swsci->dslp);
> +
> +       printf("\n");
> +}
> +
> +static void decode_asle(const void *buffer)
> +{
> +       const struct opregion_asle *asle = buffer;
> +       int i;
> +
> +       printf("OpRegion Mailbox 3: BIOS to Driver Notification (ASLE):\n");
> +
> +       printf("\tardy:\t0x%08x\n", asle->ardy);
> +       printf("\taslc:\t0x%08x\n", asle->aslc);
> +       printf("\ttche:\t0x%08x\n", asle->tche);
> +       printf("\talsi:\t0x%08x\n", asle->alsi);
> +       printf("\tbclp:\t0x%08x\n", asle->bclp);
> +       printf("\tpfit:\t0x%08x\n", asle->pfit);
> +       printf("\tcblv:\t0x%08x\n", asle->cblv);
> +
> +       printf("\tbclm:\n");
> +       for (i = 0; i < ARRAY_SIZE(asle->bclm); i++)
> +               printf("\t\tbclm[%d]:\t0x%04x\n", i, asle->bclm[i]);
> +
> +       printf("\tcpfm:\t0x%08x\n", asle->cpfm);
> +       printf("\tepfm:\t0x%08x\n", asle->epfm);
> +
> +       printf("\tplut header:\t0x%02x\n", asle->plut_header);
> +
> +       printf("\tplut identifier:");
> +       for (i = 0; i < ARRAY_SIZE(asle->plut_identifier); i++)
> +               printf(" %02x", asle->plut_identifier[i]);
> +       printf("\n");
> +
> +       printf("\tplut:\n");
> +       for (i = 0; i < ARRAY_SIZE(asle->plut); i++) {
> +               const int COLUMNS = 7;
> +
> +               if (i % COLUMNS == 0)
> +                       printf("\t\tplut[%d]:\t", i / COLUMNS);
> +
> +               printf("%02x ", asle->plut[i]);
> +
> +               if (i % COLUMNS == COLUMNS - 1)
> +                       printf("\n");
> +       }
> +
> +       printf("\tpfmb:\t0x%08x\n", asle->pfmb);
> +       printf("\tccdv:\t0x%08x\n", asle->ccdv);
> +       printf("\tpcft:\t0x%08x\n", asle->pcft);
> +       printf("\tsrot:\t0x%08x\n", asle->srot);
> +       printf("\tiuer:\t0x%08x\n", asle->iuer);
> +
> +       printf("\tfdss:\t");
> +       for (i = 0; i < ARRAY_SIZE(asle->fdss); i++)
> +               printf("%02x ", asle->fdss[i]);
> +       printf("\n");
> +
> +       printf("\tfdsp:\t0x%08x\n", asle->fdsp);
> +       printf("\tstat:\t0x%08x\n", asle->stat);
> +
> +       printf("\n");
> +}
> +
> +static void decode_vbt(const void *buffer)
> +{
> +       const struct opregion_vbt *vbt = buffer;
> +       char *s;
> +
> +       printf("OpRegion Mailbox 4: Video BIOS Table (VBT):\n");
> +
> +       s = strndup(vbt->product_string, sizeof(vbt->product_string));
> +       printf("\tproduct string:\t%s\n", s);
> +       free(s);
> +
> +       printf("\t(use intel_bios_reader to decode the VBT)\n");
> +
> +       printf("\n");
> +}
> +
> +static void decode_asle_ext(const void *buffer)
> +{
> +       const struct opregion_asle_ext *asle_ext = buffer;
> +       int i;
> +
> +       printf("OpRegion Mailbox 5: BIOS to Driver Notification Extension:\n");
> +
> +       printf("\tphed:\t0x%08x\n", asle_ext->phed);
> +
> +       printf("\tbddc:\n");
> +       for (i = 0; i < ARRAY_SIZE(asle_ext->bddc); i++) {
> +               const int COLUMNS = 16;
> +
> +               if (i % COLUMNS == 0)
> +                       printf("\t\tbddc[0x%02x]:\t", i);
> +
> +               printf("%02x ", asle_ext->bddc[i]);
> +
> +               if (i % COLUMNS == COLUMNS - 1)
> +                       printf("\n");
> +       }
> +
> +       printf("\n");
> +}
> +
> +static void decode_opregion(const uint8_t *opregion, int size)
> +{
> +       uint32_t mbox;
> +
> +       /* XXX: allow decoding up to size */
> +       if (OPREGION_ASLE_EXT_OFFSET + sizeof(struct opregion_asle_ext) > size) {
> +               fprintf(stderr, "buffer too small\n");
> +               return;
> +       }
> +
> +       mbox = decode_header(opregion + OPREGION_HEADER_OFFSET);
> +       if (mbox & MBOX_ACPI)
> +               decode_acpi(opregion + OPREGION_ACPI_OFFSET);
> +       if (mbox & MBOX_SWSCI)
> +               decode_swsci(opregion + OPREGION_SWSCI_OFFSET);
> +       if (mbox & MBOX_ASLE)
> +               decode_asle(opregion + OPREGION_ASLE_OFFSET);
> +       if (mbox & MBOX_VBT)
> +               decode_vbt(opregion + OPREGION_VBT_OFFSET);
> +       if (mbox & MBOX_ASLE_EXT)
> +               decode_asle_ext(opregion + OPREGION_ASLE_EXT_OFFSET);
> +}
> +
> +int main(int argc, char *argv[])
> +{
> +       const char *filename = "/sys/kernel/debug/dri/0/i915_opregion";
> +       int fd;
> +       struct stat finfo;
> +       uint8_t *opregion;
> +       int c, option_index = 0;
> +
> +       static struct option long_options[] = {
> +               { "file", required_argument, 0, 'f' },
> +               { "help", no_argument, 0, 'h' },
> +               { 0 },
> +       };
> +
> +       while ((c = getopt_long(argc, argv, "hf:",
> +                               long_options, &option_index)) != -1) {
> +               switch (c) {
> +               case 'h':
> +                       printf("usage: intel_opregion_decode [-f|--file=<input>]\n");
> +                       return 0;
> +               case 'f':
> +                       filename = optarg;
> +                       break;
> +               default:
> +                       fprintf(stderr, "unkown command options\n");
> +                       return 1;
> +               }
> +       }
> +
> +       fd = open(filename, O_RDONLY);
> +       if (fd == -1) {
> +               printf("Couldn't open \"%s\": %s\n", filename, strerror(errno));
> +               return 1;
> +       }
> +
> +       if (stat(filename, &finfo)) {
> +               printf("failed to stat \"%s\": %s\n", filename, strerror(errno));
> +               return 1;
> +       }
> +
> +       if (finfo.st_size == 0) {
> +               int len = 0, ret;
> +               finfo.st_size = 8192;
> +               opregion = malloc(finfo.st_size);
> +               while ((ret = read(fd, opregion + len, finfo.st_size - len))) {
> +                       if (ret < 0) {
> +                               printf("failed to read \"%s\": %s\n", filename,
> +                                      strerror(errno));
> +                               return 1;
> +                       }
> +
> +                       len += ret;
> +                       if (len == finfo.st_size) {
> +                               finfo.st_size *= 2;
> +                               opregion = realloc(opregion, finfo.st_size);
> +                       }
> +               }
> +       } else {
> +               opregion = mmap(NULL, finfo.st_size, PROT_READ, MAP_SHARED,
> +                               fd, 0);
> +               if (opregion == MAP_FAILED) {
> +                       printf("failed to map \"%s\": %s\n", filename,
> +                              strerror(errno));
> +                       return 1;
> +               }
> +       }
> +
> +       decode_opregion(opregion, finfo.st_size);
> +
> +       return 0;
> +}
> --
> 1.7.10.4
>
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

Thanks

-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br
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