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grub/grub-core/commands/setpci.c

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/* lspci.c - List PCI devices. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008, 2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/pci.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/extcmd.h>
#include <grub/env.h>
#include <grub/mm.h>
#include <grub/i18n.h>
struct pci_register
{
const char *name;
grub_uint16_t addr;
unsigned size;
};
struct pci_register pci_registers[] =
{
{"VENDOR_ID", GRUB_PCI_REG_VENDOR , 2},
{"DEVICE_ID", GRUB_PCI_REG_DEVICE , 2},
{"COMMAND", GRUB_PCI_REG_COMMAND , 2},
{"STATUS", GRUB_PCI_REG_STATUS , 2},
{"REVISION", GRUB_PCI_REG_REVISION , 1},
{"CLASS_PROG", GRUB_PCI_REG_CLASS + 1 , 1},
{"CLASS_DEVICE", GRUB_PCI_REG_CLASS + 2 , 2},
{"CACHE_LINE_SIZE", GRUB_PCI_REG_CACHELINE , 1},
{"LATENCY_TIMER", GRUB_PCI_REG_LAT_TIMER , 1},
{"HEADER_TYPE", GRUB_PCI_REG_HEADER_TYPE , 1},
{"BIST", GRUB_PCI_REG_BIST , 1},
{"BASE_ADDRESS_0", GRUB_PCI_REG_ADDRESS_REG0, 4},
{"BASE_ADDRESS_1", GRUB_PCI_REG_ADDRESS_REG1, 4},
{"BASE_ADDRESS_2", GRUB_PCI_REG_ADDRESS_REG2, 4},
{"BASE_ADDRESS_3", GRUB_PCI_REG_ADDRESS_REG3, 4},
{"BASE_ADDRESS_4", GRUB_PCI_REG_ADDRESS_REG4, 4},
{"BASE_ADDRESS_5", GRUB_PCI_REG_ADDRESS_REG5, 4},
{"CARDBUS_CIS", GRUB_PCI_REG_CIS_POINTER , 4},
{"SUBVENDOR_ID", GRUB_PCI_REG_SUBVENDOR , 2},
{"SUBSYSTEM_ID", GRUB_PCI_REG_SUBSYSTEM , 2},
{"ROM_ADDRESS", GRUB_PCI_REG_ROM_ADDRESS , 4},
{"CAP_POINTER", GRUB_PCI_REG_CAP_POINTER , 1},
{"INTERRUPT_LINE", GRUB_PCI_REG_IRQ_LINE , 1},
{"INTERRUPT_PIN", GRUB_PCI_REG_IRQ_PIN , 1},
{"MIN_GNT", GRUB_PCI_REG_MIN_GNT , 1},
{"MAX_LAT", GRUB_PCI_REG_MIN_GNT , 1},
};
static const struct grub_arg_option options[] =
{
{0, 'd', 0, "Select device by vendor and device IDs.",
"[vendor]:[device]", ARG_TYPE_STRING},
{0, 's', 0, "Select device by its position on the bus.",
"[bus]:[slot][.func]", ARG_TYPE_STRING},
{0, 'v', 0, "Save read value into variable VARNAME.",
"VARNAME", ARG_TYPE_STRING},
{0, 0, 0, 0, 0, 0}
};
static grub_uint32_t pciid_check_mask, pciid_check_value;
static int bus, device, function;
static int check_bus, check_device, check_function;
static grub_uint32_t write_mask, regwrite;
static int regsize;
static grub_uint16_t regaddr;
static const char *varname;
static int NESTED_FUNC_ATTR
grub_setpci_iter (grub_pci_device_t dev, grub_pci_id_t pciid)
{
grub_uint32_t regval = 0;
grub_pci_address_t addr;
if ((pciid & pciid_check_mask) != pciid_check_value)
return 0;
if (check_bus && grub_pci_get_bus (dev) != bus)
return 0;
if (check_device && grub_pci_get_device (dev) != device)
return 0;
if (check_function && grub_pci_get_function (dev) != device)
return 0;
addr = grub_pci_make_address (dev, regaddr);
switch (regsize)
{
case 1:
regval = grub_pci_read_byte (addr);
break;
case 2:
regval = grub_pci_read_word (addr);
break;
case 4:
regval = grub_pci_read (addr);
break;
}
if (varname)
{
char buf[sizeof ("XXXXXXXX")];
grub_snprintf (buf, sizeof (buf), "%x", regval);
grub_env_set (varname, buf);
return 1;
}
if (!write_mask)
{
grub_printf ("Register %x of %d:%d.%d is %x\n", regaddr,
grub_pci_get_bus (dev),
grub_pci_get_device (dev),
grub_pci_get_function (dev),
regval);
return 0;
}
regval = (regval & ~write_mask) | regwrite;
switch (regsize)
{
case 1:
grub_pci_write_byte (addr, regval);
break;
case 2:
grub_pci_write_word (addr, regval);
break;
case 4:
grub_pci_write (addr, regval);
break;
}
return 0;
}
static grub_err_t
grub_cmd_setpci (grub_extcmd_t cmd, int argc, char **argv)
{
const char *ptr;
unsigned i;
pciid_check_value = 0;
pciid_check_mask = 0;
if (cmd->state[0].set)
{
ptr = cmd->state[0].arg;
pciid_check_value |= (grub_strtoul (ptr, (char **) &ptr, 16) & 0xffff);
if (grub_errno == GRUB_ERR_BAD_NUMBER)
{
grub_errno = GRUB_ERR_NONE;
ptr = cmd->state[0].arg;
}
else
pciid_check_mask |= 0xffff;
if (grub_errno)
return grub_errno;
if (*ptr != ':')
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Colon expected.");
ptr++;
pciid_check_value |= (grub_strtoul (ptr, (char **) &ptr, 16) & 0xffff)
<< 16;
if (grub_errno == GRUB_ERR_BAD_NUMBER)
grub_errno = GRUB_ERR_NONE;
else
pciid_check_mask |= 0xffff0000;
}
pciid_check_value &= pciid_check_mask;
check_bus = check_device = check_function = 0;
if (cmd->state[1].set)
{
const char *optr;
ptr = cmd->state[1].arg;
optr = ptr;
bus = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno == GRUB_ERR_BAD_NUMBER)
{
grub_errno = GRUB_ERR_NONE;
ptr = optr;
}
else
check_bus = 1;
if (grub_errno)
return grub_errno;
if (*ptr != ':')
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Colon expected.");
ptr++;
optr = ptr;
device = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno == GRUB_ERR_BAD_NUMBER)
{
grub_errno = GRUB_ERR_NONE;
ptr = optr;
}
else
check_device = 1;
if (*ptr == '.')
{
ptr++;
function = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
return grub_errno;
check_function = 1;
}
}
if (cmd->state[2].set)
varname = cmd->state[2].arg;
else
varname = NULL;
write_mask = 0;
if (argc == 0)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Command expected.");
if (argc > 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Only one command is supported.");
ptr = argv[0];
for (i = 0; i < ARRAY_SIZE (pci_registers); i++)
{
if (grub_strncmp (ptr, pci_registers[i].name,
grub_strlen (pci_registers[i].name)) == 0)
break;
}
if (i == ARRAY_SIZE (pci_registers))
{
regsize = 0;
regaddr = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "Unknown register");
}
else
{
regaddr = pci_registers[i].addr;
regsize = pci_registers[i].size;
ptr += grub_strlen (pci_registers[i].name);
}
if (grub_errno)
return grub_errno;
if (*ptr == '+')
{
ptr++;
regaddr += grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
return grub_errno;
}
if (grub_memcmp (ptr, ".L", sizeof (".L") - 1) == 0
|| grub_memcmp (ptr, ".l", sizeof (".l") - 1) == 0)
{
regsize = 4;
ptr += sizeof (".l") - 1;
}
else if (grub_memcmp (ptr, ".W", sizeof (".W") - 1) == 0
|| grub_memcmp (ptr, ".w", sizeof (".w") - 1) == 0)
{
regsize = 2;
ptr += sizeof (".w") - 1;
}
else if (grub_memcmp (ptr, ".B", sizeof (".B") - 1) == 0
|| grub_memcmp (ptr, ".b", sizeof (".b") - 1) == 0)
{
regsize = 1;
ptr += sizeof (".b") - 1;
}
if (!regsize)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"Unknown register size.");
write_mask = 0;
if (*ptr == '=')
{
ptr++;
regwrite = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
return grub_errno;
write_mask = 0xffffffff;
if (*ptr == ':')
{
ptr++;
write_mask = grub_strtoul (ptr, (char **) &ptr, 16);
if (grub_errno)
return grub_errno;
write_mask = 0xffffffff;
}
regwrite &= write_mask;
}
if (write_mask && varname)
return grub_error (GRUB_ERR_BAD_ARGUMENT,
"Option -v isn't valid for writes.");
grub_pci_iterate (grub_setpci_iter);
return GRUB_ERR_NONE;
}
static grub_extcmd_t cmd;
GRUB_MOD_INIT(setpci)
{
cmd = grub_register_extcmd ("setpci", grub_cmd_setpci, GRUB_COMMAND_FLAG_BOTH,
N_("[-s POSITION] [-d DEVICE] [-v VAR] "
"[REGISTER][=VALUE[:MASK]]"),
N_("Manipulate PCI devices."), options);
}
GRUB_MOD_FINI(setpci)
{
grub_unregister_extcmd (cmd);
}
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