Author: hailfinger Date: Wed Nov 10 16:25:18 2010 New Revision: 1232 URL: http://flashrom.org/trac/flashrom/changeset/1232
Log: Revert PCI config space writes on shutdown. This means all chipset enables etc. will be undone on shutdown. Reversible PCI config space writes now use rpci_write_*(). PCI config space writes which are one-shot (e.g. communication via config space) should continue to use the permanent pci_write_* variants.
Extend the number of available register_shutdown slots to 32.
Signed-off-by: Carl-Daniel Hailfinger c-d.hailfinger.devel.2006@gmx.net Acked-by: Michael Karcher flashrom@mkarcher.dialup.fu-berlin.de
Modified: trunk/atahpt.c trunk/chipset_enable.c trunk/drkaiser.c trunk/flashrom.c trunk/gfxnvidia.c trunk/pcidev.c trunk/programmer.h
Modified: trunk/atahpt.c ============================================================================== --- trunk/atahpt.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/atahpt.c Wed Nov 10 16:25:18 2010 (r1232) @@ -50,7 +50,7 @@ /* Enable flash access. */ reg32 = pci_read_long(pcidev_dev, REG_FLASH_ACCESS); reg32 |= (1 << 24); - pci_write_long(pcidev_dev, REG_FLASH_ACCESS, reg32); + rpci_write_long(pcidev_dev, REG_FLASH_ACCESS, reg32);
buses_supported = CHIP_BUSTYPE_PARALLEL;
@@ -59,13 +59,7 @@
int atahpt_shutdown(void) { - uint32_t reg32; - - /* Disable flash access again. */ - reg32 = pci_read_long(pcidev_dev, REG_FLASH_ACCESS); - reg32 &= ~(1 << 24); - pci_write_long(pcidev_dev, REG_FLASH_ACCESS, reg32); - + /* Flash access is disabled automatically by PCI restore. */ pci_cleanup(pacc); release_io_perms(); return 0;
Modified: trunk/chipset_enable.c ============================================================================== --- trunk/chipset_enable.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/chipset_enable.c Wed Nov 10 16:25:18 2010 (r1232) @@ -47,7 +47,7 @@ */ tmp = pci_read_byte(dev, 0x47); tmp |= 0x46; - pci_write_byte(dev, 0x47, tmp); + rpci_write_byte(dev, 0x47, tmp);
return 0; } @@ -58,7 +58,7 @@
tmp = pci_read_byte(dev, 0xd0); tmp |= 0xf8; - pci_write_byte(dev, 0xd0, tmp); + rpci_write_byte(dev, 0xd0, tmp);
return 0; } @@ -72,7 +72,7 @@ new = pci_read_byte(dev, 0x40); new &= (~0x04); /* No idea why we clear bit 2. */ new |= 0xb; /* 0x3 for some chipsets, bit 7 seems to be don't care. */ - pci_write_byte(dev, 0x40, new); + rpci_write_byte(dev, 0x40, new); newer = pci_read_byte(dev, 0x40); if (newer != new) { msg_pinfo("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x40, new, name); @@ -160,7 +160,7 @@ new = pci_read_byte(sbdev, 0x45); new &= (~0x20); new |= 0x4; - pci_write_byte(sbdev, 0x45, new); + rpci_write_byte(sbdev, 0x45, new); newer = pci_read_byte(sbdev, 0x45); if (newer != new) { msg_pinfo("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x45, new, name); @@ -186,7 +186,7 @@ new = pci_read_byte(sbdev, 0x45); new &= (~0x80); new |= 0x40; - pci_write_byte(sbdev, 0x45, new); + rpci_write_byte(sbdev, 0x45, new); newer = pci_read_byte(sbdev, 0x45); if (newer != new) { msg_pinfo("tried to set register 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x45, new, name); @@ -233,7 +233,7 @@ if (new == old) return 0;
- pci_write_word(dev, xbcs, new); + rpci_write_word(dev, xbcs, new);
if (pci_read_word(dev, xbcs) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", xbcs, new, name); @@ -269,7 +269,7 @@ if (new == old) return 0;
- pci_write_byte(dev, bios_cntl, new); + rpci_write_byte(dev, bios_cntl, new);
if (pci_read_byte(dev, bios_cntl) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", bios_cntl, new, name); @@ -306,8 +306,8 @@
/* FIXME: Need to undo this on shutdown. */ msg_pinfo("\nSetting IDSEL=0x%x for top 16 MB", fwh_conf); - pci_write_long(dev, 0xd0, fwh_conf); - pci_write_word(dev, 0xd4, fwh_conf); + rpci_write_long(dev, 0xd0, fwh_conf); + rpci_write_word(dev, 0xd4, fwh_conf); /* FIXME: Decode settings are not changed. */ } else if (idsel) { msg_perr("Error: idsel= specified, but no number given.\n"); @@ -403,7 +403,7 @@ new = old & ~1;
if (new != old) - pci_write_byte(dev, 0xd9, new); + rpci_write_byte(dev, 0xd9, new);
buses_supported = CHIP_BUSTYPE_FWH; return 0; @@ -498,17 +498,6 @@ return enable_flash_ich_dc_spi(dev, name, 10); }
-static void via_do_byte_merge(void * arg) -{ - struct pci_dev * dev = arg; - uint8_t val; - - msg_pdbg("Re-enabling byte merging\n"); - val = pci_read_byte(dev, 0x71); - val |= 0x40; - pci_write_byte(dev, 0x71, val); -} - static int via_no_byte_merge(struct pci_dev *dev, const char *name) { uint8_t val; @@ -518,8 +507,7 @@ { msg_pdbg("Disabling byte merging\n"); val &= ~0x40; - pci_write_byte(dev, 0x71, val); - register_shutdown(via_do_byte_merge, dev); + rpci_write_byte(dev, 0x71, val); } return NOT_DONE_YET; /* need to find south bridge, too */ } @@ -529,12 +517,12 @@ uint8_t val;
/* enable ROM decode range (1MB) FFC00000 - FFFFFFFF */ - pci_write_byte(dev, 0x41, 0x7f); + rpci_write_byte(dev, 0x41, 0x7f);
/* ROM write enable */ val = pci_read_byte(dev, 0x40); val |= 0x10; - pci_write_byte(dev, 0x40, val); + rpci_write_byte(dev, 0x40, val);
if (pci_read_byte(dev, 0x40) != val) { msg_pinfo("\nWARNING: Failed to enable flash write on "%s"\n", @@ -546,7 +534,7 @@ /* All memory cycles, not just ROM ones, go to LPC. */ val = pci_read_byte(dev, 0x59); val &= ~0x80; - pci_write_byte(dev, 0x59, val); + rpci_write_byte(dev, 0x59, val); }
return 0; @@ -580,12 +568,12 @@ reg8 |= LOWER_ROM_ADDRESS_RANGE; reg8 |= UPPER_ROM_ADDRESS_RANGE; reg8 |= ROM_WRITE_ENABLE; - pci_write_byte(dev, ROM_AT_LOGIC_CONTROL_REG, reg8); + rpci_write_byte(dev, ROM_AT_LOGIC_CONTROL_REG, reg8);
/* Set positive decode on ROM. */ reg8 = pci_read_byte(dev, DECODE_CONTROL_REG2); reg8 |= BIOS_ROM_POSITIVE_DECODE; - pci_write_byte(dev, DECODE_CONTROL_REG2, reg8); + rpci_write_byte(dev, DECODE_CONTROL_REG2, reg8);
reg8 = pci_read_byte(dev, CS5530_RESET_CONTROL_REG); if (reg8 & CS5530_ISA_MASTER) { @@ -649,7 +637,7 @@ { uint8_t new;
- pci_write_byte(dev, 0x52, 0xee); + rpci_write_byte(dev, 0x52, 0xee);
new = pci_read_byte(dev, 0x52);
@@ -670,7 +658,7 @@ old = pci_read_byte(dev, 0x43); new = old | 0xC0; if (new != old) { - pci_write_byte(dev, 0x43, new); + rpci_write_byte(dev, 0x43, new); if (pci_read_byte(dev, 0x43) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x43, new, name); } @@ -681,7 +669,7 @@ new = old | 0x01; if (new == old) return 0; - pci_write_byte(dev, 0x40, new); + rpci_write_byte(dev, 0x40, new);
if (pci_read_byte(dev, 0x40) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x40, new, name); @@ -709,7 +697,7 @@ (prot & 0xfffffc00), (prot & 0xfffffc00) + ((prot & 0x3ff) << 8)); prot &= 0xfffffffc; - pci_write_byte(dev, reg, prot); + rpci_write_byte(dev, reg, prot); prot = pci_read_long(dev, reg); if (prot & 0x3) msg_perr("SB600 %s%sunprotect failed from %u to %u\n", @@ -765,11 +753,11 @@ { uint8_t tmp;
- pci_write_byte(dev, 0x92, 0); + rpci_write_byte(dev, 0x92, 0);
tmp = pci_read_byte(dev, 0x6d); tmp |= 0x01; - pci_write_byte(dev, 0x6d, tmp); + rpci_write_byte(dev, 0x6d, tmp);
return 0; } @@ -781,7 +769,7 @@ old = pci_read_byte(dev, 0x88); new = old | 0xc0; if (new != old) { - pci_write_byte(dev, 0x88, new); + rpci_write_byte(dev, 0x88, new); if (pci_read_byte(dev, 0x88) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x88, new, name); } @@ -791,7 +779,7 @@ new = old | 0x01; if (new == old) return 0; - pci_write_byte(dev, 0x6d, new); + rpci_write_byte(dev, 0x6d, new);
if (pci_read_byte(dev, 0x6d) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x6d, new, name); @@ -835,12 +823,12 @@ /* Enable some SMBus stuff. */ tmp = pci_read_byte(smbusdev, 0x79); tmp |= 0x01; - pci_write_byte(smbusdev, 0x79, tmp); + rpci_write_byte(smbusdev, 0x79, tmp);
/* Change southbridge. */ tmp = pci_read_byte(dev, 0x48); tmp |= 0x21; - pci_write_byte(dev, 0x48, tmp); + rpci_write_byte(dev, 0x48, tmp);
/* Now become a bit silly. */ tmp = INB(0xc6f); @@ -862,19 +850,19 @@ /* Set the 0-16 MB enable bits. */ val = pci_read_byte(dev, 0x88); val |= 0xff; /* 256K */ - pci_write_byte(dev, 0x88, val); + rpci_write_byte(dev, 0x88, val); val = pci_read_byte(dev, 0x8c); val |= 0xff; /* 1M */ - pci_write_byte(dev, 0x8c, val); + rpci_write_byte(dev, 0x8c, val); wordval = pci_read_word(dev, 0x90); wordval |= 0x7fff; /* 16M */ - pci_write_word(dev, 0x90, wordval); + rpci_write_word(dev, 0x90, wordval);
old = pci_read_byte(dev, 0x6d); new = old | 0x01; if (new == old) return 0; - pci_write_byte(dev, 0x6d, new); + rpci_write_byte(dev, 0x6d, new);
if (pci_read_byte(dev, 0x6d) != new) { msg_pinfo("tried to set 0x%x to 0x%x on %s failed (WARNING ONLY)\n", 0x6d, new, name); @@ -931,7 +919,7 @@ #if 0 val |= (1 << 6); val &= ~(1 << 5); - pci_write_byte(dev, 0x8a, val); + rpci_write_byte(dev, 0x8a, val); #endif
if (mcp6x_spi_init(want_spi)) { @@ -954,11 +942,11 @@ /* Set the 4MB enable bit. */ val = pci_read_byte(dev, 0x41); val |= 0x0e; - pci_write_byte(dev, 0x41, val); + rpci_write_byte(dev, 0x41, val);
val = pci_read_byte(dev, 0x43); val |= (1 << 4); - pci_write_byte(dev, 0x43, val); + rpci_write_byte(dev, 0x43, val);
return 0; }
Modified: trunk/drkaiser.c ============================================================================== --- trunk/drkaiser.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/drkaiser.c Wed Nov 10 16:25:18 2010 (r1232) @@ -47,7 +47,7 @@ drkaiser_pcidev);
/* Write magic register to enable flash write. */ - pci_write_word(pcidev_dev, PCI_MAGIC_DRKAISER_ADDR, + rpci_write_word(pcidev_dev, PCI_MAGIC_DRKAISER_ADDR, PCI_MAGIC_DRKAISER_VALUE);
/* Map 128KB flash memory window. */ @@ -61,8 +61,7 @@
int drkaiser_shutdown(void) { - /* Write protect the flash again. */ - pci_write_word(pcidev_dev, PCI_MAGIC_DRKAISER_ADDR, 0); + /* Flash write is disabled automatically by PCI restore. */ pci_cleanup(pacc); release_io_perms(); return 0;
Modified: trunk/flashrom.c ============================================================================== --- trunk/flashrom.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/flashrom.c Wed Nov 10 16:25:18 2010 (r1232) @@ -442,7 +442,7 @@ {}, /* This entry corresponds to PROGRAMMER_INVALID. */ };
-#define SHUTDOWN_MAXFN 4 +#define SHUTDOWN_MAXFN 32 static int shutdown_fn_count = 0; struct shutdown_func_data { void (*func) (void *data);
Modified: trunk/gfxnvidia.c ============================================================================== --- trunk/gfxnvidia.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/gfxnvidia.c Wed Nov 10 16:25:18 2010 (r1232) @@ -75,7 +75,7 @@ /* Allow access to flash interface (will disable screen). */ reg32 = pci_read_long(pcidev_dev, 0x50); reg32 &= ~(1 << 0); - pci_write_long(pcidev_dev, 0x50, reg32); + rpci_write_long(pcidev_dev, 0x50, reg32);
nvidia_bar = physmap("NVIDIA", io_base_addr, 16 * 1024 * 1024);
@@ -89,13 +89,9 @@
int gfxnvidia_shutdown(void) { - uint32_t reg32; - - /* Disallow access to flash interface (and re-enable screen). */ - reg32 = pci_read_long(pcidev_dev, 0x50); - reg32 |= (1 << 0); - pci_write_long(pcidev_dev, 0x50, reg32); - + /* Flash interface access is disabled (and screen enabled) automatically + * by PCI restore. + */ pci_cleanup(pacc); release_io_perms(); return 0;
Modified: trunk/pcidev.c ============================================================================== --- trunk/pcidev.c Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/pcidev.c Wed Nov 10 16:25:18 2010 (r1232) @@ -142,3 +142,73 @@ (devs[i].status == NT) ? " (untested)" : ""); } } + +enum pci_write_type { + pci_write_type_byte, + pci_write_type_word, + pci_write_type_long, +}; + +struct undo_pci_write_data { + struct pci_dev dev; + int reg; + enum pci_write_type type; + union { + uint8_t bytedata; + uint16_t worddata; + uint32_t longdata; + }; +}; + +void undo_pci_write(void *p) +{ + struct undo_pci_write_data *data = p; + msg_pdbg("Restoring PCI config space for %02x:%02x:%01x reg 0x%02x\n", + data->dev.bus, data->dev.dev, data->dev.func, data->reg); + switch (data->type) { + case pci_write_type_byte: + pci_write_byte(&data->dev, data->reg, data->bytedata); + break; + case pci_write_type_word: + pci_write_word(&data->dev, data->reg, data->worddata); + break; + case pci_write_type_long: + pci_write_long(&data->dev, data->reg, data->longdata); + break; + } + /* p was allocated in register_undo_pci_write. */ + free(p); +} + +#define register_undo_pci_write(a, b, c) \ +{ \ + struct undo_pci_write_data *undo_pci_write_data; \ + undo_pci_write_data = malloc(sizeof(struct undo_pci_write_data)); \ + undo_pci_write_data->dev = *a; \ + undo_pci_write_data->reg = b; \ + undo_pci_write_data->type = pci_write_type_##c; \ + undo_pci_write_data->c##data = pci_read_##c(dev, reg); \ + register_shutdown(undo_pci_write, undo_pci_write_data); \ +} + +#define register_undo_pci_write_byte(a, b) register_undo_pci_write(a, b, byte) +#define register_undo_pci_write_word(a, b) register_undo_pci_write(a, b, word) +#define register_undo_pci_write_long(a, b) register_undo_pci_write(a, b, long) + +int rpci_write_byte(struct pci_dev *dev, int reg, uint8_t data) +{ + register_undo_pci_write_byte(dev, reg); + return pci_write_byte(dev, reg, data); +} + +int rpci_write_word(struct pci_dev *dev, int reg, uint16_t data) +{ + register_undo_pci_write_word(dev, reg); + return pci_write_word(dev, reg, data); +} + +int rpci_write_long(struct pci_dev *dev, int reg, uint32_t data) +{ + register_undo_pci_write_long(dev, reg); + return pci_write_long(dev, reg, data); +}
Modified: trunk/programmer.h ============================================================================== --- trunk/programmer.h Wed Nov 10 04:26:57 2010 (r1231) +++ trunk/programmer.h Wed Nov 10 16:25:18 2010 (r1232) @@ -212,6 +212,12 @@ }; uint32_t pcidev_validate(struct pci_dev *dev, uint32_t bar, const struct pcidev_status *devs); uint32_t pcidev_init(uint16_t vendor_id, uint32_t bar, const struct pcidev_status *devs); +/* rpci_write_* are reversible writes. The original PCI config space register + * contents will be restored on shutdown. + */ +int rpci_write_byte(struct pci_dev *dev, int reg, u8 data); +int rpci_write_word(struct pci_dev *dev, int reg, u16 data); +int rpci_write_long(struct pci_dev *dev, int reg, u32 data); #endif
/* print.c */
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