fb1e414a09
-Add a bus manager level, which is an object oriented walk of the pci busses to build a per device object for later manipulation. -Add features to enable MSI interrupts. -Extend generic interrupt api to allow the platform to allocate vectors for MSI interrupts. -Rearrange a bit of the pc platform for the platform api changes. -Add PC platform support for using the local apic to EOI MSI vectors. -Fix up a few existing PCI drivers for small API changes. -Add a few stubbed out routines for non PC platforms that use PCI.
291 lines
11 KiB
C++
291 lines
11 KiB
C++
/*
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* Copyright (c) 2009 Corey Tabaka
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <app.h>
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#include <lk/debug.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <lk/compiler.h>
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#include <lk/err.h>
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#include <platform.h>
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#include <dev/bus/pci.h>
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#include <lk/console_cmd.h>
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/*
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* enumerates pci devices
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*/
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static void pci_list(void) {
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pci_location_t state;
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int busses = 0, devices = 0, lines = 0, ret;
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printf("Scanning (brute force)...\n");
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for (int segment = 0; segment <= (int)pci_get_last_segment(); segment++) {
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state.segment = segment;
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for (int bus = 0; bus <= (int)pci_get_last_bus(); bus++) {
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state.bus = bus;
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busses++;
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for (int dev = 0; dev < 32; dev++) {
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state.dev = dev;
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for (int fn = 0; fn < 8; fn++) {
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state.fn = fn;
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uint16_t vendor_id;
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ret = pci_read_config_half(state, PCI_CONFIG_VENDOR_ID, &vendor_id);
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if (ret != NO_ERROR) goto error;
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if (vendor_id == 0xffff && fn == 0) {
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// skip this device now before bothering to read the rest of the
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// configuration in.
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break;
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}
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pci_config_t config;
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ret = pci_read_config(state, &config);
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if (ret != NO_ERROR) continue;
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if (config.vendor_id != 0xffff) {
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printf("%04x:%02x:%02x.%0x vendor_id=%04x device_id=%04x, header_type=%02x "
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"base_class=%02x, sub_class=%02x, interface=%02x, irq=%u\n",
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state.segment, state.bus, state.dev, state.fn,
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config.vendor_id, config.device_id, config.header_type, config.base_class,
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config.sub_class, config.program_interface, config.type0.interrupt_line);
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devices++;
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lines++;
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}
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if ((fn == 0) && ~config.header_type & PCI_HEADER_TYPE_MULTI_FN) {
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// this is not a multi-function device, so advance to the next device
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// only check when looking at function 0 of a device
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break;
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}
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}
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}
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}
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}
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printf("... done. Scanned %d busses, found %d device/functions\n", busses, devices);
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quit:
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return;
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error:
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printf("Error while reading PCI config space: %02x\n", ret);
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}
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/*
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* a somewhat fugly pci config space examine/modify command. this should probably
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* be broken up a bit.
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*/
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static int pci_config(int argc, const console_cmd_args *argv) {
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pci_location_t loc;
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pci_config_t config;
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uint32_t offset;
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unsigned int i;
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int ret;
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if (argc < 6) {
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return -1;
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}
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if (!strcmp(argv[2].str, "dump")) {
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loc.segment = 0;
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loc.bus = atoui(argv[3].str);
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loc.dev = atoui(argv[4].str);
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loc.fn = atoui(argv[5].str);
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if (pci_read_config(loc, &config) != NO_ERROR) {
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printf("error reading configuration\n");
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return -1;
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}
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printf("Device at %04x:%02x:%02x.%1x vendor id=%04x device id=%04x\n", loc.segment, loc.bus,
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loc.dev, loc.fn, config.vendor_id, config.device_id);
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printf("command=%04x status=%04x pi=%02x sub cls=%02x base cls=%02x htype=%02x\n",
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config.command, config.status, config.program_interface,
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config.sub_class, config.base_class, config.header_type & PCI_HEADER_TYPE_MASK);
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printf("int pin %u int line %u\n", config.type0.interrupt_pin, config.type0.interrupt_line);
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uint8_t header_type = config.header_type & PCI_HEADER_TYPE_MASK;
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if (header_type == PCI_HEADER_TYPE_STANDARD) { // type 0
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for (i=0; i < 6; i+=2) {
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printf("bar%d=%08x bar%d=%08x\n", i, config.type0.base_addresses[i],
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i+1, config.type0.base_addresses[i+1]);
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}
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} else if (header_type == PCI_HEADER_TYPE_PCI_BRIDGE) { // type 1
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printf("primary bus=%02x secondary=%02x subordinate=%02x\n",
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config.type1.primary_bus, config.type1.secondary_bus, config.type1.subordinate_bus);
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for (i=0; i < 2; i+=2) {
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printf("bar%d=%08x bar%d=%08x\n", i, config.type1.base_addresses[i],
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i+1, config.type1.base_addresses[i+1]);
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}
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printf("mem base=%08x mem limit=%08x\n", config.type1.memory_base << 16,
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(config.type1.memory_limit << 16) | 0xf'ffff);
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switch ((config.type1.io_base & 0xf)) {
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case 0: // 16 bit io addressing
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printf("io base=%04x io limit=%04x\n", (config.type1.io_base & 0xf0) << 8,
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((config.type1.io_limit & 0xf0) << 8) | 0xfff );
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break;
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case 1: // 32 bit io addressing
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printf("io base=%08x io limit=%08x\n",
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(config.type1.io_base % 0xf0) << 8 | config.type1.io_base_upper << 16,
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((config.type1.io_limit & 0xf0) << 8) | 0xfff | config.type1.io_limit_upper << 16);
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break;
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}
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switch ((config.type1.prefetchable_memory_base & 0xf)) {
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case 0: // 32 bit prefetchable addressing
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printf("prefetchable base=%08x prefetchable limit=%08x\n",
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(config.type1.prefetchable_memory_base & 0xfff0) << 16,
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(config.type1.prefetchable_memory_limit & 0xfff0) << 16 | 0xf'ffff);
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break;
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case 1: // 64 bit prefetchable addressing
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printf("prefetchable base=%llx prefetchable limit=%llx\n",
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((uint64_t)config.type1.prefetchable_memory_base & 0xfff0) << 16 |
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((uint64_t)config.type1.prefetchable_base_upper << 32),
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((uint64_t)config.type1.prefetchable_memory_limit & 0xfff0) << 16 | 0xf'ffff |
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((uint64_t)config.type1.prefetchable_limit_upper << 32));
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break;
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}
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}
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hexdump8_ex(&config, sizeof(config), 0);
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} else if (!strcmp(argv[2].str, "hexdump")) {
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loc.segment = 0;
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loc.bus = atoui(argv[3].str);
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loc.dev = atoui(argv[4].str);
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loc.fn = atoui(argv[5].str);
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if (pci_read_config(loc, &config) != NO_ERROR) {
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printf("error reading configuration\n");
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return -1;
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}
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hexdump8_ex(&config, sizeof(config), 0);
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} else if (!strcmp(argv[2].str, "rb") || !strcmp(argv[2].str, "rh") || !strcmp(argv[2].str, "rw")) {
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if (argc != 7) {
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return -1;
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}
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loc.segment = 0;
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loc.bus = atoui(argv[3].str);
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loc.dev = atoui(argv[4].str);
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loc.fn = atoui(argv[5].str);
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offset = atoui(argv[6].str);
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switch (argv[2].str[1]) {
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case 'b': {
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uint8_t value;
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ret = pci_read_config_byte(loc, offset, &value);
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if (ret != NO_ERROR) goto error;
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printf("byte at device %04x:%02x:%02x.%1x config offset %04x: %02x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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case 'h': {
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uint16_t value;
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ret = pci_read_config_half(loc, offset, &value);
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if (ret != NO_ERROR) goto error;
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printf("half at device %04x:%02x:%02x.%1x config offset %04x: %04x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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case 'w': {
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uint32_t value;
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ret = pci_read_config_word(loc, offset, &value);
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if (ret != NO_ERROR) goto error;
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printf("word at device %04x:%02x:%02x.%1x config offset %04x: %08x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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}
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} else if (!strcmp(argv[2].str, "mb") || !strcmp(argv[2].str, "mh") || !strcmp(argv[2].str, "mw")) {
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if (argc != 8) {
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return -1;
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}
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loc.segment = 0;
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loc.bus = atoui(argv[3].str);
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loc.dev = atoui(argv[4].str);
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loc.fn = atoui(argv[5].str);
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offset = atoui(argv[6].str);
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switch (argv[2].str[1]) {
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case 'b': {
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uint8_t value = atoui(argv[7].str);
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ret = pci_write_config_byte(loc, offset, value);
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if (ret != NO_ERROR) goto error;
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printf("byte to device %04x:%02x:%02x.%1x config offset %04x: %02x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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case 'h': {
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uint16_t value = atoui(argv[7].str);
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ret = pci_write_config_half(loc, offset, value);
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if (ret != NO_ERROR) goto error;
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printf("half to device %04x:%02x:%02x.%1x config offset %04x: %04x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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case 'w': {
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uint32_t value = atoui(argv[7].str);
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ret = pci_write_config_word(loc, offset, value);
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if (ret != NO_ERROR) goto error;
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printf("word to device %04x:%02x:%02x.%1x config offset %04x: %08x\n", loc.segment, loc.bus, loc.dev, loc.fn, offset, value);
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}
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break;
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}
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} else {
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return -1;
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}
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return 0;
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error:
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printf("Error while reading PCI config space: %02x\n", ret);
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return -2;
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}
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static int pci_cmd(int argc, const console_cmd_args *argv) {
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if (argc < 2) {
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printf("pci commands:\n");
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usage:
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printf("%s list\n", argv[0].str);
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printf("%s config dump <bus> <dev> <fn>\n", argv[0].str);
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printf("%s config hexdump <bus> <dev> <fn>\n", argv[0].str);
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printf("%s config <rb|rh|rw> <bus> <dev> <fn> <offset>\n", argv[0].str);
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printf("%s config <mb|mh|mw> <bus> <dev> <fn> <offset> <value>\n", argv[0].str);
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goto out;
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}
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if (!strcmp(argv[1].str, "list")) {
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pci_list();
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} else if (!strcmp(argv[1].str, "config")) {
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if (pci_config(argc, argv)) {
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goto usage;
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}
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} else {
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goto usage;
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}
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out:
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return 0;
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}
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STATIC_COMMAND_START
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STATIC_COMMAND("pci", "pci toolbox", &pci_cmd)
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STATIC_COMMAND_END(pcitests);
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