X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=palacios%2Fsrc%2Fdevices%2Fpci.c;h=29c54358bd403511e7075f079e9a32d565200f28;hp=602f47c34d6b3197a06174adc182710e0c2b36e4;hb=afb2a35b2e15ba0fa932c4e49a3678f958a4502a;hpb=70d3ac1e7be22e42fbf8f778367e9bf6d32e5b7f diff --git a/palacios/src/devices/pci.c b/palacios/src/devices/pci.c index 602f47c..29c5435 100644 --- a/palacios/src/devices/pci.c +++ b/palacios/src/devices/pci.c @@ -7,15 +7,15 @@ * and the University of New Mexico. You can find out more at * http://www.v3vee.org * + * Copyright (c) 2009, Jack Lange * Copyright (c) 2009, Lei Xia * Copyright (c) 2009, Chang Seok Bae - * Copyright (c) 2009, Jack Lange * Copyright (c) 2009, The V3VEE Project * All rights reserved. * - * Author: Lei Xia + * Author: Jack Lange + * Lei Xia * Chang Seok Bae - * Jack Lange * * This is free software. You are permitted to use, * redistribute, and modify it as specified in the file "V3VEE_LICENSE". @@ -32,7 +32,7 @@ #include #include -#ifndef DEBUG_PCI +#ifndef CONFIG_DEBUG_PCI #undef PrintDebug #define PrintDebug(fmt, args...) #endif @@ -41,6 +41,7 @@ #define CONFIG_ADDR_PORT 0x0cf8 #define CONFIG_DATA_PORT 0x0cfc +#define PCI_DEV_IO_PORT_BASE 0xc000 #define PCI_BUS_COUNT 1 @@ -74,6 +75,11 @@ struct pci_bus { // Bitmap of the allocated device numbers uint8_t dev_map[MAX_BUS_DEVICES / 8]; + + + int (*raise_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev); + int (*lower_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev); + struct vm_device * irq_bridge_dev; }; @@ -82,6 +88,9 @@ struct pci_internal { // Configuration address register struct pci_addr_reg addr_reg; + // Base IO Port which PCI devices will register with... + uint16_t dev_io_base; + // Attached Busses struct pci_bus bus_list[PCI_BUS_COUNT]; }; @@ -90,7 +99,7 @@ struct pci_internal { -#ifdef DEBUG_PCI +#ifdef CONFIG_DEBUG_PCI static void pci_dump_state(struct pci_internal * pci_state) { struct rb_node * node = v3_rb_first(&(pci_state->bus_list[0].devices)); @@ -121,9 +130,11 @@ static int get_free_dev_num(struct pci_bus * bus) { int i, j; for (i = 0; i < sizeof(bus->dev_map); i++) { + PrintDebug("i=%d\n", i); if (bus->dev_map[i] != 0xff) { // availability for (j = 0; j < 8; j++) { + PrintDebug("\tj=%d\n", j); if (!(bus->dev_map[i] & (0x1 << j))) { return ((i * 8) + j); } @@ -312,6 +323,15 @@ static int data_port_read(ushort_t port, void * dst, uint_t length, struct vm_de return length; } + if (pci_dev->type == PCI_PASSTHROUGH) { + if (pci_dev->config_read(reg_num, dst, length, pci_dev->priv_data) == -1) { + PrintError("Failed to handle configuration update for passthrough pci_device\n"); + return -1; + } + + return 0; + } + for (i = 0; i < length; i++) { *(uint8_t *)((uint8_t *)dst + i) = pci_dev->config_space[reg_num + i]; } @@ -371,26 +391,57 @@ static inline int is_cfg_reg_writable(uchar_t header_type, int reg_num) { } -static int bar_update(struct pci_device * pci, int bar_num, uint32_t new_val) { +static int bar_update(struct guest_info * info, struct pci_device * pci, int bar_num, uint32_t new_val) { struct v3_pci_bar * bar = &(pci->bar[bar_num]); - PrintDebug("Updating BAR Register (Dev=%s) (bar=%d) (old_val=%x) (new_val=%x)\n", + PrintDebug("Updating BAR Register (Dev=%s) (bar=%d) (old_val=0x%x) (new_val=0x%x)\n", pci->name, bar_num, bar->val, new_val); switch (bar->type) { case PCI_BAR_IO: { int i = 0; - PrintDebug("\tRehooking %d IO ports from base %x to %x\n", - bar->num_ports, PCI_IO_BASE(bar->val), PCI_IO_BASE(new_val)); + PrintDebug("\tRehooking %d IO ports from base 0x%x to 0x%x for %d ports\n", + bar->num_ports, PCI_IO_BASE(bar->val), PCI_IO_BASE(new_val), + bar->num_ports); // only do this if pci device is enabled.... + if (!(pci->config_header.status & 0x1)) { + PrintError("PCI Device IO space not enabled\n"); + } + for (i = 0; i < bar->num_ports; i++) { - v3_dev_unhook_io(pci->vm_dev, PCI_IO_BASE(bar->val) + i); + PrintDebug("Rehooking PCI IO port (old port=%u) (new port=%u)\n", + PCI_IO_BASE(bar->val) + i, PCI_IO_BASE(new_val) + i); + + v3_unhook_io_port(info, PCI_IO_BASE(bar->val) + i); + + if (v3_hook_io_port(info, PCI_IO_BASE(new_val) + i, + bar->io_read, bar->io_write, + bar->private_data) == -1) { - v3_dev_hook_io(pci->vm_dev, PCI_IO_BASE(new_val) + i, - bar->io_read, bar->io_write); + PrintError("Could not hook PCI IO port (old port=%u) (new port=%u)\n", + PCI_IO_BASE(bar->val) + i, PCI_IO_BASE(new_val) + i); + v3_print_io_map(info); + return -1; + } + } + + bar->val = new_val; + + break; + } + case PCI_BAR_MEM32: { + v3_unhook_mem(info, (addr_t)(bar->val)); + + if (bar->mem_read) { + v3_hook_full_mem(info, PCI_MEM32_BASE(new_val), + PCI_MEM32_BASE(new_val) + (bar->num_pages * PAGE_SIZE_4KB), + bar->mem_read, bar->mem_write, pci->priv_data); + } else { + PrintError("Write hooks not supported for PCI\n"); + return -1; } bar->val = new_val; @@ -422,9 +473,10 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d return length; } - PrintDebug("Writing PCI Data register. bus = %d, dev = %d, reg = %d (%x) addr_reg = %x (val=%x, len=%d)\n", + PrintDebug("Writing PCI Data register. bus = %d, dev = %d, fn = %d, reg = %d (0x%x) addr_reg = 0x%x (val=0x%x, len=%d)\n", pci_state->addr_reg.bus_num, pci_state->addr_reg.dev_num, + pci_state->addr_reg.fn_num, reg_num, reg_num, pci_state->addr_reg.val, *(uint32_t *)src, length); @@ -438,6 +490,15 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d return -1; } + if (pci_dev->type == PCI_PASSTHROUGH) { + if (pci_dev->config_write(reg_num, src, length, pci_dev->priv_data) == -1) { + PrintError("Failed to handle configuration update for passthrough pci_device\n"); + return -1; + } + + return 0; + } + for (i = 0; i < length; i++) { uint_t cur_reg = reg_num + i; @@ -482,11 +543,13 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d // BIST update pci_dev->config_header.BIST = 0x00; } + } else { + PrintError("PCI Write to read only register %d\n", cur_reg); } } if (pci_dev->config_update) { - pci_dev->config_update(pci_dev, reg_num, length); + pci_dev->config_update(reg_num, src, length, pci_dev->priv_data); } // Scan for BAR updated @@ -495,13 +558,22 @@ static int data_port_write(ushort_t port, void * src, uint_t length, struct vm_d if (pci_dev->bar[i].updated) { int bar_offset = 0x10 + 4 * i; - *(uint32_t *)(pci_dev->config_space + bar_offset) &= pci_dev->bar[i].mask; - // check special flags.... - // bar_update - if (bar_update(pci_dev, i, *(uint32_t *)(pci_dev->config_space + bar_offset)) == -1) { - PrintError("PCI Device %s: Bar update Error Bar=%d\n", pci_dev->name, i); - return -1; + if (pci_dev->bar[i].type == PCI_BAR_PASSTHROUGH) { + if (pci_dev->bar[i].bar_write(i, (uint32_t *)(pci_dev->config_space + bar_offset), pci_dev->bar[i].private_data) == -1) { + PrintError("Error in passthrough bar write operation\n"); + return -1; + } + } else { + + *(uint32_t *)(pci_dev->config_space + bar_offset) &= pci_dev->bar[i].mask; + // check special flags.... + + // bar_update + if (bar_update(vmdev->vm, pci_dev, i, *(uint32_t *)(pci_dev->config_space + bar_offset)) == -1) { + PrintError("PCI Device %s: Bar update Error Bar=%d\n", pci_dev->name, i); + return -1; + } } pci_dev->bar[i].updated = 0; @@ -540,7 +612,7 @@ static int pci_stop_device(struct vm_device * dev) { -static int pci_deinit_device(struct vm_device * dev) { +static int pci_free(struct vm_device * dev) { int i = 0; for (i = 0; i < 4; i++){ @@ -565,16 +637,33 @@ static void init_pci_busses(struct pci_internal * pci_state) { -static int pci_init_device(struct vm_device * dev) { - struct pci_internal * pci_state = (struct pci_internal *)dev->private_data; + +static struct v3_device_ops dev_ops = { + .free = pci_free, + .reset = pci_reset_device, + .start = pci_start_device, + .stop = pci_stop_device, +}; + + + + +static int pci_init(struct guest_info * vm, void * cfg_data) { + struct pci_internal * pci_state = V3_Malloc(sizeof(struct pci_internal)); int i = 0; - PrintDebug("pci: init_device\n"); + PrintDebug("PCI internal at %p\n",(void *)pci_state); + + struct vm_device * dev = v3_allocate_device("PCI", &dev_ops, pci_state); + + if (v3_attach_device(vm, dev) == -1) { + PrintError("Could not attach device %s\n", "PCI"); + return -1; + } - // JRL: Fix this.... - // dev->vm->pci = dev; //should be in vmm_config.c pci_state->addr_reg.val = 0; + pci_state->dev_io_base = PCI_DEV_IO_PORT_BASE; init_pci_busses(pci_state); @@ -589,28 +678,10 @@ static int pci_init_device(struct vm_device * dev) { } -static struct vm_device_ops dev_ops = { - .init = pci_init_device, - .deinit = pci_deinit_device, - .reset = pci_reset_device, - .start = pci_start_device, - .stop = pci_stop_device, -}; +device_register("PCI", pci_init) -struct vm_device * v3_create_pci() { - struct pci_internal * pci_state = V3_Malloc(sizeof(struct pci_internal)); - - PrintDebug("PCI internal at %p\n",(void *)pci_state); - - struct vm_device * device = v3_create_device("PCI", &dev_ops, pci_state); - - return device; -} - - - -static inline int init_bars(struct pci_device * pci_dev) { +static inline int init_bars(struct guest_info * info, struct pci_device * pci_dev) { int i = 0; for (i = 0; i < 6; i++) { @@ -620,15 +691,23 @@ static inline int init_bars(struct pci_device * pci_dev) { int j = 0; pci_dev->bar[i].mask = (~((pci_dev->bar[i].num_ports) - 1)) | 0x01; - pci_dev->bar[i].val = pci_dev->bar[i].default_base_port & pci_dev->bar[i].mask; + if (pci_dev->bar[i].default_base_port != 0xffff) { + pci_dev->bar[i].val = pci_dev->bar[i].default_base_port & pci_dev->bar[i].mask; + } else { + pci_dev->bar[i].val = 0; + } + pci_dev->bar[i].val |= 0x00000001; for (j = 0; j < pci_dev->bar[i].num_ports; j++) { // hook IO - if (v3_dev_hook_io(pci_dev->vm_dev, pci_dev->bar[i].default_base_port + j, - pci_dev->bar[i].io_read, pci_dev->bar[i].io_write) == -1) { - PrintError("Could not hook default io port %x\n", pci_dev->bar[i].default_base_port + j); - return -1; + if (pci_dev->bar[i].default_base_port != 0xffff) { + if (v3_hook_io_port(info, pci_dev->bar[i].default_base_port + j, + pci_dev->bar[i].io_read, pci_dev->bar[i].io_write, + pci_dev->bar[i].private_data) == -1) { + PrintError("Could not hook default io port %x\n", pci_dev->bar[i].default_base_port + j); + return -1; + } } } @@ -638,14 +717,18 @@ static inline int init_bars(struct pci_device * pci_dev) { pci_dev->bar[i].mask = ~((pci_dev->bar[i].num_pages << 12) - 1); pci_dev->bar[i].mask |= 0xf; // preserve the configuration flags - pci_dev->bar[i].val = pci_dev->bar[i].default_base_addr & pci_dev->bar[i].mask; + if (pci_dev->bar[i].default_base_addr != 0xffffffff) { + pci_dev->bar[i].val = pci_dev->bar[i].default_base_addr & pci_dev->bar[i].mask; + } else { + pci_dev->bar[i].val = 0; + } // hook memory if (pci_dev->bar[i].mem_read) { // full hook - v3_hook_full_mem(pci_dev->vm_dev->vm, pci_dev->bar[i].default_base_addr, + v3_hook_full_mem(info, pci_dev->bar[i].default_base_addr, pci_dev->bar[i].default_base_addr + (pci_dev->bar[i].num_pages * PAGE_SIZE_4KB), - pci_dev->bar[i].mem_read, pci_dev->bar[i].mem_write, pci_dev->vm_dev); + pci_dev->bar[i].mem_read, pci_dev->bar[i].mem_write, pci_dev->priv_data); } else if (pci_dev->bar[i].mem_write) { // write hook PrintError("Write hooks not supported for PCI devices\n"); @@ -663,13 +746,18 @@ static inline int init_bars(struct pci_device * pci_dev) { *(uint32_t *)(pci_dev->config_space + bar_offset) = pci_dev->bar[i].val; - } else if (pci_dev->bar[i].type == PCI_BAR_MEM16) { + } else if (pci_dev->bar[i].type == PCI_BAR_MEM24) { PrintError("16 Bit memory ranges not supported (reg: %d)\n", i); return -1; } else if (pci_dev->bar[i].type == PCI_BAR_NONE) { pci_dev->bar[i].val = 0x00000000; pci_dev->bar[i].mask = 0x00000000; // This ensures that all updates will be dropped *(uint32_t *)(pci_dev->config_space + bar_offset) = pci_dev->bar[i].val; + } else if (pci_dev->bar[i].type == PCI_BAR_PASSTHROUGH) { + + // Call the bar init function to get the local cached value + pci_dev->bar[i].bar_init(i, &(pci_dev->bar[i].val), pci_dev->bar[i].private_data); + } else { PrintError("Invalid BAR type for bar #%d\n", i); return -1; @@ -680,6 +768,34 @@ static inline int init_bars(struct pci_device * pci_dev) { } +int v3_pci_set_irq_bridge(struct vm_device * pci_bus, int bus_num, + int (*raise_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev), + int (*lower_pci_irq)(struct vm_device * dev, struct pci_device * pci_dev), + struct vm_device * bridge_dev) { + struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data; + + + pci_state->bus_list[bus_num].raise_pci_irq = raise_pci_irq; + pci_state->bus_list[bus_num].lower_pci_irq = lower_pci_irq; + pci_state->bus_list[bus_num].irq_bridge_dev = bridge_dev; + + return 0; +} + +int v3_pci_raise_irq(struct vm_device * pci_bus, int bus_num, struct pci_device * dev) { + struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data; + struct pci_bus * bus = &(pci_state->bus_list[bus_num]); + + return bus->raise_pci_irq(bus->irq_bridge_dev, dev); +} + +int v3_pci_lower_irq(struct vm_device * pci_bus, int bus_num, struct pci_device * dev) { + struct pci_internal * pci_state = (struct pci_internal *)pci_bus->private_data; + struct pci_bus * bus = &(pci_state->bus_list[bus_num]); + + return bus->lower_pci_irq(bus->irq_bridge_dev, dev); +} + // if dev_num == -1, auto assign struct pci_device * v3_pci_register_device(struct vm_device * pci, pci_device_type_t dev_type, @@ -688,10 +804,10 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, int fn_num, const char * name, struct v3_pci_bar * bars, - int (*config_update)(struct pci_device * pci_dev, uint_t reg_num, int length), + int (*config_update)(uint_t reg_num, void * src, uint_t length, void * priv_data), int (*cmd_update)(struct pci_device *pci_dev, uchar_t io_enabled, uchar_t mem_enabled), int (*ext_rom_update)(struct pci_device * pci_dev), - struct vm_device * dev) { + void * priv_data) { struct pci_internal * pci_state = (struct pci_internal *)pci->private_data; struct pci_bus * bus = &(pci_state->bus_list[bus_num]); @@ -703,13 +819,16 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, return NULL; } - if (dev_num == -1) { + if (dev_num == PCI_AUTO_DEV_NUM) { + PrintDebug("Searching for free device number\n"); if ((dev_num = get_free_dev_num(bus)) == -1) { PrintError("No more available PCI slots on bus %d\n", bus->bus_num); return NULL; } } + PrintDebug("Checking for PCI Device\n"); + if (get_device(bus, dev_num, fn_num) != NULL) { PrintError("PCI Device already registered at slot %d on bus %d\n", dev_num, bus->bus_num); @@ -726,8 +845,10 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, memset(pci_dev, 0, sizeof(struct pci_device)); + + pci_dev->type = dev_type; - switch (dev_type) { + switch (pci_dev->type) { case PCI_STD_DEVICE: pci_dev->config_header.header_type = 0x00; break; @@ -739,12 +860,14 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, return NULL; } + + pci_dev->bus_num = bus_num; pci_dev->dev_num = dev_num; pci_dev->fn_num = fn_num; strncpy(pci_dev->name, name, sizeof(pci_dev->name)); - pci_dev->vm_dev = dev; + pci_dev->priv_data = priv_data; // register update callbacks pci_dev->config_update = config_update; @@ -755,21 +878,39 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, //copy bars for (i = 0; i < 6; i ++) { pci_dev->bar[i].type = bars[i].type; + pci_dev->bar[i].private_data = bars[i].private_data; if (pci_dev->bar[i].type == PCI_BAR_IO) { pci_dev->bar[i].num_ports = bars[i].num_ports; - pci_dev->bar[i].default_base_port = bars[i].default_base_port; + + // This is a horrible HACK becaues the BIOS is supposed to set the PCI base ports + // And if the BIOS doesn't, Linux just happily overlaps device port assignments + if (bars[i].default_base_port != (uint16_t)-1) { + pci_dev->bar[i].default_base_port = bars[i].default_base_port; + } else { + pci_dev->bar[i].default_base_port = pci_state->dev_io_base; + pci_state->dev_io_base += ( 0x100 * ((bars[i].num_ports / 0x100) + 1) ); + } + pci_dev->bar[i].io_read = bars[i].io_read; pci_dev->bar[i].io_write = bars[i].io_write; - } else { + } else if (pci_dev->bar[i].type == PCI_BAR_MEM32) { pci_dev->bar[i].num_pages = bars[i].num_pages; pci_dev->bar[i].default_base_addr = bars[i].default_base_addr; pci_dev->bar[i].mem_read = bars[i].mem_read; pci_dev->bar[i].mem_write = bars[i].mem_write; + } else if (pci_dev->bar[i].type == PCI_BAR_PASSTHROUGH) { + pci_dev->bar[i].bar_init = bars[i].bar_init; + pci_dev->bar[i].bar_write = bars[i].bar_write; + } else { + pci_dev->bar[i].num_pages = 0; + pci_dev->bar[i].default_base_addr = 0; + pci_dev->bar[i].mem_read = NULL; + pci_dev->bar[i].mem_write = NULL; } } - if (init_bars(pci_dev) == -1) { + if (init_bars(pci->vm, pci_dev) == -1) { PrintError("could not initialize bar registers\n"); return NULL; } @@ -777,7 +918,7 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, // add the device add_device_to_bus(bus, pci_dev); -#ifdef DEBUG_PCI +#ifdef CONFIG_DEBUG_PCI pci_dump_state(pci_state); #endif @@ -786,3 +927,68 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci, +// if dev_num == -1, auto assign +struct pci_device * v3_pci_register_passthrough_device(struct vm_device * pci, + int bus_num, + int dev_num, + int fn_num, + const char * name, + int (*config_write)(uint_t reg_num, void * src, uint_t length, void * private_data), + int (*config_read)(uint_t reg_num, void * dst, uint_t length, void * private_data), + void * private_data) { + + struct pci_internal * pci_state = (struct pci_internal *)pci->private_data; + struct pci_bus * bus = &(pci_state->bus_list[bus_num]); + struct pci_device * pci_dev = NULL; + + if (dev_num > MAX_BUS_DEVICES) { + PrintError("Requested Invalid device number (%d)\n", dev_num); + return NULL; + } + + if (dev_num == PCI_AUTO_DEV_NUM) { + PrintDebug("Searching for free device number\n"); + if ((dev_num = get_free_dev_num(bus)) == -1) { + PrintError("No more available PCI slots on bus %d\n", bus->bus_num); + return NULL; + } + } + + PrintDebug("Checking for PCI Device\n"); + + if (get_device(bus, dev_num, fn_num) != NULL) { + PrintError("PCI Device already registered at slot %d on bus %d\n", + dev_num, bus->bus_num); + return NULL; + } + + + pci_dev = (struct pci_device *)V3_Malloc(sizeof(struct pci_device)); + + if (pci_dev == NULL) { + PrintError("Could not allocate pci device\n"); + return NULL; + } + + memset(pci_dev, 0, sizeof(struct pci_device)); + + pci_dev->bus_num = bus_num; + pci_dev->dev_num = dev_num; + pci_dev->fn_num = fn_num; + + strncpy(pci_dev->name, name, sizeof(pci_dev->name)); + pci_dev->priv_data = private_data; + + // register update callbacks + pci_dev->config_write = config_write; + pci_dev->config_read = config_read; + + // add the device + add_device_to_bus(bus, pci_dev); + +#ifdef CONFIG_DEBUG_PCI + pci_dump_state(pci_state); +#endif + + return pci_dev; +}