mirror of
https://git.proxmox.com/git/grub2
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342 lines
8.6 KiB
C
342 lines
8.6 KiB
C
/* lspci.c - List PCI devices. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008, 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/pci.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/extcmd.h>
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#include <grub/env.h>
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#include <grub/mm.h>
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#include <grub/i18n.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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struct pci_register
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{
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const char *name;
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grub_uint16_t addr;
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unsigned size;
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};
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static struct pci_register pci_registers[] =
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{
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{"VENDOR_ID", GRUB_PCI_REG_VENDOR , 2},
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{"DEVICE_ID", GRUB_PCI_REG_DEVICE , 2},
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{"COMMAND", GRUB_PCI_REG_COMMAND , 2},
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{"STATUS", GRUB_PCI_REG_STATUS , 2},
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{"REVISION", GRUB_PCI_REG_REVISION , 1},
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{"CLASS_PROG", GRUB_PCI_REG_CLASS + 1 , 1},
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{"CLASS_DEVICE", GRUB_PCI_REG_CLASS + 2 , 2},
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{"CACHE_LINE_SIZE", GRUB_PCI_REG_CACHELINE , 1},
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{"LATENCY_TIMER", GRUB_PCI_REG_LAT_TIMER , 1},
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{"HEADER_TYPE", GRUB_PCI_REG_HEADER_TYPE , 1},
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{"BIST", GRUB_PCI_REG_BIST , 1},
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{"BASE_ADDRESS_0", GRUB_PCI_REG_ADDRESS_REG0, 4},
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{"BASE_ADDRESS_1", GRUB_PCI_REG_ADDRESS_REG1, 4},
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{"BASE_ADDRESS_2", GRUB_PCI_REG_ADDRESS_REG2, 4},
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{"BASE_ADDRESS_3", GRUB_PCI_REG_ADDRESS_REG3, 4},
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{"BASE_ADDRESS_4", GRUB_PCI_REG_ADDRESS_REG4, 4},
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{"BASE_ADDRESS_5", GRUB_PCI_REG_ADDRESS_REG5, 4},
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{"CARDBUS_CIS", GRUB_PCI_REG_CIS_POINTER , 4},
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{"SUBVENDOR_ID", GRUB_PCI_REG_SUBVENDOR , 2},
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{"SUBSYSTEM_ID", GRUB_PCI_REG_SUBSYSTEM , 2},
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{"ROM_ADDRESS", GRUB_PCI_REG_ROM_ADDRESS , 4},
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{"CAP_POINTER", GRUB_PCI_REG_CAP_POINTER , 1},
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{"INTERRUPT_LINE", GRUB_PCI_REG_IRQ_LINE , 1},
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{"INTERRUPT_PIN", GRUB_PCI_REG_IRQ_PIN , 1},
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{"MIN_GNT", GRUB_PCI_REG_MIN_GNT , 1},
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{"MAX_LAT", GRUB_PCI_REG_MIN_GNT , 1},
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};
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static const struct grub_arg_option options[] =
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{
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{0, 'd', 0, N_("Select device by vendor and device IDs."),
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N_("[vendor]:[device]"), ARG_TYPE_STRING},
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{0, 's', 0, N_("Select device by its position on the bus."),
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N_("[bus]:[slot][.func]"), ARG_TYPE_STRING},
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{0, 'v', 0, N_("Save read value into variable VARNAME."),
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N_("VARNAME"), ARG_TYPE_STRING},
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{0, 0, 0, 0, 0, 0}
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};
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static grub_uint32_t pciid_check_mask, pciid_check_value;
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static int bus, device, function;
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static int check_bus, check_device, check_function;
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static grub_uint32_t write_mask, regwrite;
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static int regsize;
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static grub_uint16_t regaddr;
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static const char *varname;
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static int
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grub_setpci_iter (grub_pci_device_t dev, grub_pci_id_t pciid,
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void *data __attribute__ ((unused)))
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{
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grub_uint32_t regval = 0;
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grub_pci_address_t addr;
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if ((pciid & pciid_check_mask) != pciid_check_value)
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return 0;
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if (check_bus && grub_pci_get_bus (dev) != bus)
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return 0;
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if (check_device && grub_pci_get_device (dev) != device)
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return 0;
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if (check_function && grub_pci_get_function (dev) != function)
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return 0;
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addr = grub_pci_make_address (dev, regaddr);
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switch (regsize)
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{
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case 1:
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regval = grub_pci_read_byte (addr);
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break;
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case 2:
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regval = grub_pci_read_word (addr);
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break;
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case 4:
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regval = grub_pci_read (addr);
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break;
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}
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if (varname)
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{
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char buf[sizeof ("XXXXXXXX")];
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grub_snprintf (buf, sizeof (buf), "%x", regval);
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grub_env_set (varname, buf);
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return 1;
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}
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if (!write_mask)
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{
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grub_printf (_("Register %x of %x:%02x.%x is %x\n"), regaddr,
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grub_pci_get_bus (dev),
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grub_pci_get_device (dev),
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grub_pci_get_function (dev),
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regval);
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return 0;
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}
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regval = (regval & ~write_mask) | regwrite;
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switch (regsize)
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{
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case 1:
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grub_pci_write_byte (addr, regval);
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break;
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case 2:
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grub_pci_write_word (addr, regval);
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break;
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case 4:
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grub_pci_write (addr, regval);
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break;
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}
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return 0;
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}
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static grub_err_t
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grub_cmd_setpci (grub_extcmd_context_t ctxt, int argc, char **argv)
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{
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const char *ptr;
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unsigned i;
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pciid_check_value = 0;
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pciid_check_mask = 0;
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if (ctxt->state[0].set)
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{
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ptr = ctxt->state[0].arg;
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pciid_check_value |= (grub_strtoul (ptr, (char **) &ptr, 16) & 0xffff);
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if (grub_errno == GRUB_ERR_BAD_NUMBER)
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{
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grub_errno = GRUB_ERR_NONE;
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ptr = ctxt->state[0].arg;
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}
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else
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pciid_check_mask |= 0xffff;
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if (grub_errno)
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return grub_errno;
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if (*ptr != ':')
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("missing `%c' symbol"), ':');
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ptr++;
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pciid_check_value |= (grub_strtoul (ptr, (char **) &ptr, 16) & 0xffff)
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<< 16;
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if (grub_errno == GRUB_ERR_BAD_NUMBER)
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grub_errno = GRUB_ERR_NONE;
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else
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pciid_check_mask |= 0xffff0000;
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}
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pciid_check_value &= pciid_check_mask;
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check_bus = check_device = check_function = 0;
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if (ctxt->state[1].set)
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{
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const char *optr;
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ptr = ctxt->state[1].arg;
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optr = ptr;
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bus = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno == GRUB_ERR_BAD_NUMBER)
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{
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grub_errno = GRUB_ERR_NONE;
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ptr = optr;
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}
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else
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check_bus = 1;
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if (grub_errno)
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return grub_errno;
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if (*ptr != ':')
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("missing `%c' symbol"), ':');
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ptr++;
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optr = ptr;
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device = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno == GRUB_ERR_BAD_NUMBER)
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{
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grub_errno = GRUB_ERR_NONE;
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ptr = optr;
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}
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else
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check_device = 1;
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if (*ptr == '.')
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{
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ptr++;
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function = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno)
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return grub_errno;
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check_function = 1;
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}
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}
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if (ctxt->state[2].set)
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varname = ctxt->state[2].arg;
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else
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varname = NULL;
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write_mask = 0;
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if (argc != 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
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ptr = argv[0];
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for (i = 0; i < ARRAY_SIZE (pci_registers); i++)
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{
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if (grub_strncmp (ptr, pci_registers[i].name,
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grub_strlen (pci_registers[i].name)) == 0)
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break;
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}
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if (i == ARRAY_SIZE (pci_registers))
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{
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regsize = 0;
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regaddr = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown register");
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}
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else
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{
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regaddr = pci_registers[i].addr;
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regsize = pci_registers[i].size;
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ptr += grub_strlen (pci_registers[i].name);
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}
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if (grub_errno)
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return grub_errno;
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if (*ptr == '+')
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{
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ptr++;
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regaddr += grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno)
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return grub_errno;
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}
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if (grub_memcmp (ptr, ".L", sizeof (".L") - 1) == 0
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|| grub_memcmp (ptr, ".l", sizeof (".l") - 1) == 0)
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{
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regsize = 4;
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ptr += sizeof (".l") - 1;
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}
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else if (grub_memcmp (ptr, ".W", sizeof (".W") - 1) == 0
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|| grub_memcmp (ptr, ".w", sizeof (".w") - 1) == 0)
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{
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regsize = 2;
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ptr += sizeof (".w") - 1;
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}
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else if (grub_memcmp (ptr, ".B", sizeof (".B") - 1) == 0
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|| grub_memcmp (ptr, ".b", sizeof (".b") - 1) == 0)
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{
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regsize = 1;
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ptr += sizeof (".b") - 1;
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}
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if (!regsize)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"unknown register size");
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write_mask = 0;
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if (*ptr == '=')
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{
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ptr++;
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regwrite = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno)
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return grub_errno;
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write_mask = 0xffffffff;
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if (*ptr == ':')
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{
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ptr++;
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write_mask = grub_strtoul (ptr, (char **) &ptr, 16);
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if (grub_errno)
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return grub_errno;
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write_mask = 0xffffffff;
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}
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regwrite &= write_mask;
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}
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if (write_mask && varname)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"option -v isn't valid for writes");
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grub_pci_iterate (grub_setpci_iter, NULL);
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return GRUB_ERR_NONE;
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}
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static grub_extcmd_t cmd;
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GRUB_MOD_INIT(setpci)
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{
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cmd = grub_register_extcmd ("setpci", grub_cmd_setpci, 0,
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N_("[-s POSITION] [-d DEVICE] [-v VAR] "
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"REGISTER[=VALUE[:MASK]]"),
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N_("Manipulate PCI devices."), options);
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}
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GRUB_MOD_FINI(setpci)
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{
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grub_unregister_extcmd (cmd);
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}
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