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#define _BSD_SOURCE
#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <stdlib.h>
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <arpa/inet.h>
#include <errno.h>
#include <assert.h>
#include "pcilib.h"
#include "pci.h"
#include "tools.h"
#include "error.h"
#include "model.h"
#include "plugin.h"
pcilib_bar_t pcilib_detect_bar(pcilib_t *ctx, uintptr_t addr, size_t size) {
int n = 0;
pcilib_bar_t i;
const pcilib_board_info_t *board_info = pcilib_get_board_info(ctx);
if (!board_info) return PCILIB_BAR_INVALID;
for (i = 0; i < PCILIB_MAX_BARS; i++) {
if (board_info->bar_length[i] > 0) {
if ((addr >= board_info->bar_start[i])&&((board_info->bar_start[i] + board_info->bar_length[i]) >= (addr + size))) return i;
if (n) n = -1;
else n = i + 1;
}
}
if (n > 0) return n - 1;
return PCILIB_BAR_INVALID;
}
int pcilib_detect_address(pcilib_t *ctx, pcilib_bar_t *bar, uintptr_t *addr, size_t size) {
const pcilib_board_info_t *board_info = pcilib_get_board_info(ctx);
if (!board_info) return PCILIB_ERROR_NOTFOUND;
if (*bar == PCILIB_BAR_DETECT) {
*bar = pcilib_detect_bar(ctx, *addr, size);
if (*bar == PCILIB_BAR_INVALID) {
pcilib_error("The requested data block at address 0x%x with size %zu does not belongs to any available memory bar", *addr, size);
return PCILIB_ERROR_NOTFOUND;
}
if (*addr < board_info->bar_start[*bar])
*addr += board_info->bar_start[*bar];
} else {
if ((*addr < board_info->bar_start[*bar])||((board_info->bar_start[*bar] + board_info->bar_length[*bar]) < (((uintptr_t)*addr) + size))) {
if ((board_info->bar_length[*bar]) >= (((uintptr_t)*addr) + size)) {
*addr += board_info->bar_start[*bar];
} else {
pcilib_error("The requested data block at address 0x%x with size %zu does not belong the specified memory bar (Bar %i: starting at 0x%x with size 0x%x)", *addr, size, *bar, board_info->bar_start[*bar], board_info->bar_length[*bar]);
return PCILIB_ERROR_NOTFOUND;
}
}
}
*addr -= board_info->bar_start[*bar];
*addr += board_info->bar_start[*bar] & ctx->page_mask;
return 0;
}
void *pcilib_map_bar(pcilib_t *ctx, pcilib_bar_t bar) {
void *res;
int err, ret;
const pcilib_board_info_t *board_info = pcilib_get_board_info(ctx);
if (!board_info) return NULL;
if (ctx->bar_space[bar]) return ctx->bar_space[bar];
err = pcilib_lock_global(ctx);
if (err) {
pcilib_error("Error (%i) acquiring mmap lock", err);
return NULL;
}
ret = ioctl( ctx->handle, PCIDRIVER_IOC_MMAP_MODE, PCIDRIVER_MMAP_PCI );
if (ret) {
pcilib_unlock_global(ctx);
pcilib_error("PCIDRIVER_IOC_MMAP_MODE ioctl have failed", bar);
return NULL;
}
ret = ioctl( ctx->handle, PCIDRIVER_IOC_MMAP_AREA, PCIDRIVER_BAR0 + bar );
if (ret) {
pcilib_unlock_global(ctx);
pcilib_error("PCIDRIVER_IOC_MMAP_AREA ioctl have failed for bank %i", bar);
return NULL;
}
#ifdef PCILIB_FILE_IO
file_io_handle = open("/root/data", O_RDWR);
res = mmap( 0, board_info->bar_length[bar], PROT_WRITE | PROT_READ, MAP_SHARED, ctx->file_io_handle, 0 );
#else
res = mmap( 0, board_info->bar_length[bar], PROT_WRITE | PROT_READ, MAP_SHARED, ctx->handle, 0 );
#endif
pcilib_unlock_global(ctx);
if ((!res)||(res == MAP_FAILED)) {
pcilib_error("Failed to mmap data bank %i", bar);
return NULL;
}
return res;
}
void pcilib_unmap_bar(pcilib_t *ctx, pcilib_bar_t bar, void *data) {
const pcilib_board_info_t *board_info = pcilib_get_board_info(ctx);
if (!board_info) return;
if (ctx->bar_space[bar]) return;
munmap(data, board_info->bar_length[bar]);
#ifdef PCILIB_FILE_IO
close(ctx->file_io_handle);
#endif
}
int pcilib_map_register_space(pcilib_t *ctx) {
int err;
pcilib_register_bank_t i;
if (!ctx->reg_bar_mapped) {
const pcilib_model_description_t *model_info = pcilib_get_model_description(ctx);
const pcilib_register_bank_description_t *banks = model_info->banks;
for (i = 0; ((banks)&&(banks[i].access)); i++) {
// uint32_t buf[2];
void *reg_space;
pcilib_bar_t bar = banks[i].bar;
if (bar == PCILIB_BAR_NOBAR)
continue;
if (bar == PCILIB_BAR_DETECT) {
uintptr_t addr = banks[0].read_addr;
err = pcilib_detect_address(ctx, &bar, &addr, 1);
if (err) return err;
if (!ctx->bar_space[bar]) {
reg_space = pcilib_map_bar(ctx, bar);
// pcilib_memcpy(&buf, reg_space, 8);
if (reg_space) {
ctx->bar_space[bar] = reg_space;
} else {
return PCILIB_ERROR_FAILED;
}
}
} else if (!ctx->bar_space[bar]) {
reg_space = pcilib_map_bar(ctx, bar);
if (reg_space) {
ctx->bar_space[bar] = reg_space;
} else {
return PCILIB_ERROR_FAILED;
}
// pcilib_memcpy(&buf, reg_space, 8);
}
if (!i) ctx->reg_bar = bar;
}
ctx->reg_bar_mapped = 1;
}
return 0;
}
int pcilib_read(pcilib_t *ctx, pcilib_bar_t bar, uintptr_t addr, size_t size, void *buf) {
void *data;
pcilib_detect_address(ctx, &bar, &addr, size);
data = pcilib_map_bar(ctx, bar);
pcilib_memcpy(buf, data + addr, size);
pcilib_unmap_bar(ctx, bar, data);
return 0;
}
int pcilib_write(pcilib_t *ctx, pcilib_bar_t bar, uintptr_t addr, size_t size, void *buf) {
void *data;
pcilib_detect_address(ctx, &bar, &addr, size);
data = pcilib_map_bar(ctx, bar);
pcilib_memcpy(data + addr, buf, size);
pcilib_unmap_bar(ctx, bar, data);
return 0;
}
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