#include #include #include #include #include #include "acpi.h" #include "acpi_bus.h" #include "dmdev.h" #define PREFIX "ACPI: " #define ACPI_BUS_CLASS "system_bus" #define ACPI_BUS_HID "KLBSYBUS" #define ACPI_BUS_DEVICE_NAME "System Bus" #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) LIST_HEAD(acpi_device_list); LIST_HEAD(acpi_bus_id_list); LIST_HEAD(dmdev_tree); struct acpi_device_bus_id { char bus_id[15]; unsigned int instance_no; struct list_head node; }; #define ACPI_NS_ROOT_PATH "\\" #define ACPI_NS_SYSTEM_BUS "_SB_" enum acpi_irq_model_id { ACPI_IRQ_MODEL_PIC = 0, ACPI_IRQ_MODEL_IOAPIC, ACPI_IRQ_MODEL_IOSAPIC, ACPI_IRQ_MODEL_PLATFORM, ACPI_IRQ_MODEL_COUNT }; enum acpi_bus_removal_type { ACPI_BUS_REMOVAL_NORMAL = 0, ACPI_BUS_REMOVAL_EJECT, ACPI_BUS_REMOVAL_SUPRISE, ACPI_BUS_REMOVAL_TYPE_COUNT }; #define PCI_MAX_DEVICES 32 #define PCI_MAX_PINS 4 #define IRQ_TABLE_ENTRIES (PCI_MAX_DEVICES * PCI_MAX_PINS) static int irqtable[IRQ_TABLE_ENTRIES]; static ACPI_HANDLE pci_root_handle; #define addr_offset(addr, off) \ (addr_t)((addr_t)(addr) + (addr_t)(off)) //#define acpi_remap( addr ) \ // (addr_t)((addr_t)(addr) + OS_BASE) #define acpi_remap( addr ) MapIoMem((void*)(addr),4096, 0x01) char* strdup(const char *str); int sprintf(char *buf, const char *fmt, ...); void print_pci_irqs(); struct acpi_device *acpi_root; extern struct resource iomem_resource; extern struct resource ioport_resource; enum pic_mode { IO_PIC = 0, IO_APIC }; static ACPI_STATUS resource_to_addr(ACPI_RESOURCE *resource, ACPI_RESOURCE_ADDRESS64 *addr); static void create_dm_list(); static void print_dm_list(); int write_device_dat(char *path); static void set_pic_mode(enum pic_mode mode) { ACPI_OBJECT arg1; ACPI_OBJECT_LIST args; ACPI_STATUS as; arg1.Type = ACPI_TYPE_INTEGER; arg1.Integer.Value = mode; args.Count = 1; args.Pointer = &arg1; as = AcpiEvaluateObject(ACPI_ROOT_OBJECT, "_PIC", &args, NULL); /* * We can silently ignore failure as it may not be implemented, ACPI should * provide us with correct information anyway */ if (ACPI_SUCCESS(as)) dbgprintf(PREFIX "machine set to %s mode\n", mode ? "APIC" : "PIC"); } static bool pci_use_crs = false; #define IORESOURCE_BUS 0x00001000 extern struct list_head acpi_pci_roots; #define ACPI_PCI_ROOT_CLASS "pci_bridge" #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" static ACPI_STATUS get_root_bridge_busnr_callback(ACPI_RESOURCE *resource, void *data) { struct resource *res = data; ACPI_RESOURCE_ADDRESS64 address; if (resource->Type != ACPI_RESOURCE_TYPE_ADDRESS16 && resource->Type != ACPI_RESOURCE_TYPE_ADDRESS32 && resource->Type != ACPI_RESOURCE_TYPE_ADDRESS64) return AE_OK; AcpiResourceToAddress64(resource, &address); if ((address.AddressLength > 0) && (address.ResourceType == ACPI_BUS_NUMBER_RANGE)) { res->start = address.Minimum; res->end = address.Minimum + address.AddressLength - 1; } return AE_OK; } static ACPI_STATUS try_get_root_bridge_busnr(ACPI_HANDLE handle, struct resource *res) { ACPI_STATUS status; res->start = -1; status = AcpiWalkResources(handle, METHOD_NAME__CRS, get_root_bridge_busnr_callback, res); if (ACPI_FAILURE(status)) return status; if (res->start == -1) return AE_ERROR; return AE_OK; } static void acpi_pci_bridge_scan(struct acpi_device *device) { int status; struct acpi_device *child = NULL; if (device->flags.bus_address) if (device->parent && device->parent->ops.bind) { status = device->parent->ops.bind(device); if (!status) { list_for_each_entry(child, &device->children, node) acpi_pci_bridge_scan(child); } } } struct pci_root_info { struct acpi_device *bridge; char *name; unsigned int res_num; struct resource *res; struct pci_bus *bus; int busnum; }; static ACPI_STATUS resource_to_addr(ACPI_RESOURCE *resource, ACPI_RESOURCE_ADDRESS64 *addr) { ACPI_STATUS status; struct acpi_resource_memory24 *memory24; struct acpi_resource_memory32 *memory32; struct acpi_resource_fixed_memory32 *fixed_memory32; memset(addr, 0, sizeof(*addr)); switch (resource->Type) { case ACPI_RESOURCE_TYPE_MEMORY24: memory24 = &resource->Data.Memory24; addr->ResourceType = ACPI_MEMORY_RANGE; addr->Minimum = memory24->Minimum; addr->AddressLength = memory24->AddressLength; addr->Maximum = addr->Minimum + addr->AddressLength - 1; return AE_OK; case ACPI_RESOURCE_TYPE_MEMORY32: memory32 = &resource->Data.Memory32; addr->ResourceType = ACPI_MEMORY_RANGE; addr->Minimum = memory32->Minimum; addr->AddressLength = memory32->AddressLength; addr->Maximum = addr->Minimum + addr->AddressLength - 1; return AE_OK; case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: fixed_memory32 = &resource->Data.FixedMemory32; addr->ResourceType = ACPI_MEMORY_RANGE; addr->Minimum = fixed_memory32->Address; addr->AddressLength = fixed_memory32->AddressLength; addr->Maximum = addr->Minimum + addr->AddressLength - 1; return AE_OK; case ACPI_RESOURCE_TYPE_ADDRESS16: case ACPI_RESOURCE_TYPE_ADDRESS32: case ACPI_RESOURCE_TYPE_ADDRESS64: status = AcpiResourceToAddress64(resource, addr); if (ACPI_SUCCESS(status) && (addr->ResourceType == ACPI_MEMORY_RANGE || addr->ResourceType == ACPI_IO_RANGE) && addr->AddressLength > 0) { return AE_OK; } break; } return AE_ERROR; } static ACPI_STATUS count_resource(ACPI_RESOURCE *acpi_res, void *data) { struct pci_root_info *info = data; ACPI_RESOURCE_ADDRESS64 addr; ACPI_STATUS status; status = resource_to_addr(acpi_res, &addr); if (ACPI_SUCCESS(status)) info->res_num++; return AE_OK; } static ACPI_STATUS setup_resource(ACPI_RESOURCE *acpi_res, void *data) { struct pci_root_info *info = data; struct resource *res; struct acpi_resource_address64 addr; ACPI_STATUS status; unsigned long flags; u64 start, end; status = resource_to_addr(acpi_res, &addr); if (!ACPI_SUCCESS(status)) return AE_OK; if (addr.ResourceType == ACPI_MEMORY_RANGE) { flags = IORESOURCE_MEM; if (addr.Info.Mem.Caching == ACPI_PREFETCHABLE_MEMORY) flags |= IORESOURCE_PREFETCH; } else if (addr.ResourceType == ACPI_IO_RANGE) { flags = IORESOURCE_IO; } else return AE_OK; start = addr.Minimum + addr.TranslationOffset; end = addr.Maximum + addr.TranslationOffset; res = &info->res[info->res_num]; res->name = info->name; res->flags = flags; res->start = start; res->end = end; res->child = NULL; if (!pci_use_crs) { printk("host bridge window %pR (ignored)\n", res); return AE_OK; } info->res_num++; if (addr.TranslationOffset) dev_info(NULL, "host bridge window %pR " "(PCI address [%#llx-%#llx])\n", res, res->start - addr.TranslationOffset, res->end - addr.TranslationOffset); else dev_info(NULL, "host bridge window %pR\n", res); return AE_OK; } static void get_current_resources(struct acpi_device *device, int busnum, int domain, struct pci_bus *bus) { struct pci_root_info info; size_t size; char buf[64]; // if (pci_use_crs) // pci_bus_remove_resources(bus); info.bridge = device; info.bus = bus; info.res_num = 0; AcpiWalkResources(device->handle, METHOD_NAME__CRS, count_resource, &info); if (!info.res_num) return; size = sizeof(*info.res) * info.res_num; info.res = kmalloc(size, GFP_KERNEL); if (!info.res) goto res_alloc_fail; sprintf(buf,"PCI Bus %04x:%02x", domain, busnum); info.name = strdup(buf); if (!info.name) goto name_alloc_fail; info.res_num = 0; AcpiWalkResources(device->handle, METHOD_NAME__CRS, setup_resource, &info); return; name_alloc_fail: kfree(info.res); res_alloc_fail: return; } struct pci_ops pci_root_ops = { .read = NULL, .write = NULL, }; struct pci_bus* pci_acpi_scan_root(struct acpi_pci_root *root) { struct acpi_device *device = root->device; int domain = root->segment; int busnum = root->secondary.start; struct pci_bus *bus; struct pci_sysdata *sd; int node = 0; if (domain ) { printk(KERN_WARNING "pci_bus %04x:%02x: " "ignored (multiple domains not supported)\n", domain, busnum); return NULL; } node = -1; /* Allocate per-root-bus (not per bus) arch-specific data. * TODO: leak; this memory is never freed. * It's arguable whether it's worth the trouble to care. */ sd = kzalloc(sizeof(*sd), GFP_KERNEL); if (!sd) { printk(KERN_WARNING "pci_bus %04x:%02x: " "ignored (out of memory)\n", domain, busnum); return NULL; } sd->domain = domain; sd->node = node; /* * Maybe the desired pci bus has been already scanned. In such case * it is unnecessary to scan the pci bus with the given domain,busnum. */ bus = pci_find_bus(domain, busnum); if (bus) { /* * If the desired bus exits, the content of bus->sysdata will * be replaced by sd. */ memcpy(bus->sysdata, sd, sizeof(*sd)); kfree(sd); } else { bus = pci_create_bus(busnum, &pci_root_ops, sd); if (bus) { get_current_resources(device, busnum, domain, bus); bus->subordinate = pci_scan_child_bus(bus); } } if (!bus) kfree(sd); if (bus && node != -1) { printk("on NUMA node %d\n", node); } return bus; } static int acpi_pci_root_add(struct acpi_device *device) { unsigned long long segment, bus; ACPI_STATUS status; int result; struct acpi_pci_root *root; ACPI_HANDLE handle; struct acpi_device *child; u32 flags, base_flags; root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); if (!root) return -ENOMEM; segment = 0; status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, &segment); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); result = -ENODEV; goto end; } /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ root->secondary.flags = IORESOURCE_BUS; status = try_get_root_bridge_busnr(device->handle, &root->secondary); if (ACPI_FAILURE(status)) { /* * We need both the start and end of the downstream bus range * to interpret _CBA (MMCONFIG base address), so it really is * supposed to be in _CRS. If we don't find it there, all we * can do is assume [_BBN-0xFF] or [0-0xFF]. */ root->secondary.end = 0xFF; printk(KERN_WARNING PREFIX "no secondary bus range in _CRS\n"); status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); if (ACPI_SUCCESS(status)) root->secondary.start = bus; else if (status == AE_NOT_FOUND) root->secondary.start = 0; else { printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); result = -ENODEV; goto end; } } INIT_LIST_HEAD(&root->node); root->device = device; root->segment = segment & 0xFFFF; strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); device->driver_data = root; /* * All supported architectures that use ACPI have support for * PCI domains, so we indicate this in _OSC support capabilities. */ // flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; // acpi_pci_osc_support(root, flags); /* * TBD: Need PCI interface for enumeration/configuration of roots. */ /* TBD: Locking */ list_add_tail(&root->node, &acpi_pci_roots); printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", acpi_device_name(device), acpi_device_bid(device), root->segment, &root->secondary); /* * Scan the Root Bridge * -------------------- * Must do this prior to any attempt to bind the root device, as the * PCI namespace does not get created until this call is made (and * thus the root bridge's pci_dev does not exist). */ root->bus = pci_acpi_scan_root(root); if (!root->bus) { printk(KERN_ERR PREFIX "Bus %04x:%02x not present in PCI namespace\n", root->segment, (unsigned int)root->secondary.start); result = -ENODEV; goto end; } /* * Attach ACPI-PCI Context * ----------------------- * Thus binding the ACPI and PCI devices. */ result = acpi_pci_bind_root(device); if (result) goto end; /* * PCI Routing Table * ----------------- * Evaluate and parse _PRT, if exists. */ status = AcpiGetHandle(device->handle, METHOD_NAME__PRT, &handle); if (ACPI_SUCCESS(status)) result = acpi_pci_irq_add_prt(device->handle, root->bus); /* * Scan and bind all _ADR-Based Devices */ list_for_each_entry(child, &device->children, node) acpi_pci_bridge_scan(child); return 0; end: if (!list_empty(&root->node)) list_del(&root->node); kfree(root); return result; } static const struct acpi_device_ids root_device_ids[] = { {"PNP0A03", 0}, {"", 0}, }; void acpi_init_pci(struct acpi_device *device) { struct acpi_device *child; if ( !acpi_match_device_ids(device, root_device_ids) ) { dbgprintf(PREFIX "PCI root %s\n", device->pnp.bus_id); acpi_pci_root_add(device); }; list_for_each_entry(child, &device->children, node) { acpi_init_pci(child); }; }; uint32_t drvEntry(int action, char *cmdline) { uint32_t retval; ACPI_STATUS status; int i; if(action != 1) return 0; status = AcpiInitializeSubsystem(); if (status != AE_OK) { printf("AcpiInitializeSubsystem failed (%s)\n", AcpiFormatException(status)); goto err; } status = AcpiInitializeTables (NULL, 16, FALSE); if (status != AE_OK) { printf("AcpiInitializeTables failed (%s)\n", AcpiFormatException(status)); goto err; } status = AcpiLoadTables(); if (status != AE_OK) { printf("AcpiLoadTables failed (%s)\n", AcpiFormatException(status)); goto err; } // u32_t mode = ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE; status = AcpiEnableSubsystem(ACPI_NO_HANDLER_INIT | ACPI_NO_HARDWARE_INIT); if (status != AE_OK) { dbgprintf("AcpiEnableSubsystem failed (%s)\n", AcpiFormatException(status)); goto err; } status = AcpiInitializeObjects (ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE (status)) { dbgprintf("AcpiInitializeObjects failed (%s)\n", AcpiFormatException(status)); goto err; } set_pic_mode(IO_APIC); acpi_scan(); acpi_init_pci(acpi_root); print_pci_irqs(); create_dm_list(); print_dm_list(); write_device_dat("/SYS/DRIVERS/DEVICES.DAT"); err: return 0; }; char* strdup(const char *str) { size_t len = strlen (str) + 1; char *copy = malloc(len); if (copy) { memcpy (copy, str, len); } return copy; } static void dm_add_pci_bus(struct pci_bus *bus) { struct pci_bus *tbus; struct pci_dev *dev; dmdev_t *dmdev; dmdev = (dmdev_t*)kzalloc(sizeof(dmdev_t),GFP_KERNEL); // INIT_LIST_HEAD(&dmdev->list); // dmdev->type = 1; // dmdev->acpi_dev = bus->self->acpi_dev; // dmdev->pci_dev = bus->self; // list_add_tail(&dmdev->list, &dmdev_tree); list_for_each_entry(dev, &bus->devices, bus_list) { dmdev = (dmdev_t*)kzalloc(sizeof(dmdev_t),GFP_KERNEL); INIT_LIST_HEAD(&dmdev->list); dmdev->type = 1; dmdev->acpi_dev = dev->acpi_dev; dmdev->pci_dev = dev; list_add_tail(&dmdev->list, &dmdev_tree); }; list_for_each_entry(tbus, &bus->children, node) { dm_add_pci_bus(tbus); }; }; static ACPI_STATUS count_dev_resources(ACPI_RESOURCE *acpi_res, void *data) { (*(int*)data)++; return AE_OK; } static void dm_add_acpi(struct acpi_device *device) { struct acpi_device *child; ACPI_DEVICE_INFO *info = NULL; ACPI_STATUS status; dmdev_t *dmdev; uint32_t res_num = 0; status = AcpiGetObjectInfo(device->handle, &info); if ( (status == AE_OK) && (info->Valid & ACPI_VALID_HID)) { if( strcmp(info->HardwareId.String,"PNP0C0F") == 0) { kfree(info); return; }; }; kfree(info); if(device->pci_dev == NULL) { AcpiWalkResources(device->handle, METHOD_NAME__CRS, count_dev_resources, &res_num); if(res_num != 0) { dmdev = (dmdev_t*)kzalloc(sizeof(dmdev_t),GFP_KERNEL); INIT_LIST_HEAD(&dmdev->list); dmdev->type = 0; dmdev->acpi_dev = device; dmdev->pci_dev = NULL; list_add_tail(&dmdev->list, &dmdev_tree); }; }; list_for_each_entry(child, &device->children, node) { dm_add_acpi(child); }; }; static void create_dm_list() { struct acpi_pci_root *root; list_for_each_entry(root, &acpi_pci_roots, node) { struct pci_bus *pbus, *tbus; struct pci_dev *dev; pbus = root->bus; dm_add_pci_bus(pbus); }; dm_add_acpi(acpi_root); }; static void print_pci_resource(struct resource *res) { if(res->flags !=0 ) { if(res->flags & IORESOURCE_IO) dbgprintf(" IO range "); else if(res->flags & IORESOURCE_MEM) dbgprintf(" MMIO range "); dbgprintf("%x - %x\n", res->start, res->end); }; }; static ACPI_STATUS print_acpi_resource(ACPI_RESOURCE *acpi_res, void *data) { ACPI_RESOURCE_ADDRESS64 addr; ACPI_STATUS status; int i; switch (acpi_res->Type) { case ACPI_RESOURCE_TYPE_IRQ: { ACPI_RESOURCE_IRQ *irq_data = (ACPI_RESOURCE_IRQ*)&acpi_res->Data; dbgprintf(" IRQ %d\n", irq_data->Interrupts[0]); }; break; case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: { ACPI_RESOURCE_EXTENDED_IRQ *irq_data = (ACPI_RESOURCE_EXTENDED_IRQ*)&acpi_res->Data; dbgprintf(" IRQ %d\n", irq_data->Interrupts[0]); }; break; case ACPI_RESOURCE_TYPE_DMA: { ACPI_RESOURCE_DMA *dma_data = (ACPI_RESOURCE_DMA*) &acpi_res->Data; for(i=0; i < dma_data->ChannelCount; i++) { dbgprintf(" DMA %s channel %d\n", dma_data->Type == ACPI_TYPE_A ? "Type A": dma_data->Type == ACPI_TYPE_B ? "Type B" : dma_data->Type == ACPI_TYPE_F ? "Type F" : "", dma_data->Channels[i]); } }; break; case ACPI_RESOURCE_TYPE_IO: { ACPI_RESOURCE_IO *io_data = (ACPI_RESOURCE_IO*) &acpi_res->Data; dbgprintf(" IO range 0%x-0%x\n",io_data->Minimum, io_data->Minimum+io_data->AddressLength-1); } break; case ACPI_RESOURCE_TYPE_FIXED_IO: { ACPI_RESOURCE_FIXED_IO *io_data = (ACPI_RESOURCE_FIXED_IO*) &acpi_res->Data; dbgprintf(" Fixed IO range 0%x-0%x\n",io_data->Address, io_data->Address+io_data->AddressLength-1); }; break; case ACPI_RESOURCE_TYPE_MEMORY24: case ACPI_RESOURCE_TYPE_MEMORY32: case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: { ACPI_RESOURCE_ADDRESS64 addr64; resource_to_addr(acpi_res, &addr64); dbgprintf(" Memory range 0%x-0%x\n", (uint32_t)addr64.Minimum, (uint32_t)addr64.Maximum); } break; case ACPI_RESOURCE_TYPE_ADDRESS16: case ACPI_RESOURCE_TYPE_ADDRESS32: case ACPI_RESOURCE_TYPE_ADDRESS64: { ACPI_RESOURCE_ADDRESS64 addr64; ACPI_STATUS status; status = AcpiResourceToAddress64(acpi_res, &addr64); if (ACPI_SUCCESS(status)) { dbgprintf(" Address range 0%x-0%x\n", (uint32_t)addr64.Minimum, (uint32_t)addr64.Maximum); } }; break; }; return AE_OK; }; static void print_dm_list() { struct pci_dev *pcidev; struct acpi_device *acpidev; dmdev_t *dmdev; uint32_t i; dbgprintf("\nDevices:\n"); list_for_each_entry(dmdev, &dmdev_tree, list) { switch(dmdev->type) { case 0: if(dmdev->acpi_dev != NULL) { acpidev = dmdev->acpi_dev; dbgprintf("\n%s\n", acpidev->pnp.bus_id); AcpiWalkResources(acpidev->handle, METHOD_NAME__CRS, print_acpi_resource, NULL); }; break; case 1: if(dmdev->pci_dev != NULL) { pcidev = dmdev->pci_dev; dbgprintf("\nPCI_%x_%x bus:%d devfn: %x\n", pcidev->vendor, pcidev->device, pcidev->busnr, pcidev->devfn); for(i = 0; i < DEVICE_COUNT_RESOURCE; i++) print_pci_resource(&pcidev->resource[i]); if(pcidev->pin) dbgprintf(" APIC IRQ: %d\n", acpi_get_irq(pcidev)); }; break; }; }; }; typedef struct { uint32_t busaddr; uint32_t devid; uint32_t irq; uint32_t unused; }devinfo_t; #pragma pack(push, 1) typedef struct { char sec; char min; char hour; char rsv; }detime_t; typedef struct { char day; char month; short year; }dedate_t; typedef struct { unsigned attr; unsigned flags; union { detime_t ctime; unsigned cr_time; }; union { dedate_t cdate; unsigned cr_date; }; union { detime_t atime; unsigned acc_time; }; union { dedate_t adate; unsigned acc_date; }; union { detime_t mtime; unsigned mod_time; }; union { dedate_t mdate; unsigned mod_date; }; unsigned size; unsigned size_high; } FILEINFO; #pragma pack(pop) int write_device_dat(char *path) { struct pci_dev *pcidev; dmdev_t *dmdev; devinfo_t *data; int writes; int len; int i = 0; list_for_each_entry(dmdev, &dmdev_tree, list) { if(dmdev->type ==1) { if(dmdev->pci_dev != NULL) { pcidev = dmdev->pci_dev; if(pcidev->pin) i++; }; }; }; len = sizeof(devinfo_t)*i + 4; data = (devinfo_t*)malloc(len); i = 0; list_for_each_entry(dmdev, &dmdev_tree, list) { if(dmdev->type == 1) { if(dmdev->pci_dev != NULL) { pcidev = dmdev->pci_dev; if(pcidev->pin && (acpi_get_irq(pcidev) != -1) ) { data[i].busaddr = (pcidev->busnr<<8)|pcidev->devfn; data[i].devid = ((uint32_t)pcidev->device<<16) | pcidev->vendor; data[i].irq = acpi_get_irq(pcidev); data[i].unused = 0; i++; } }; }; }; data[i].busaddr = -1; FILEINFO info; int offset = 0; if(get_fileinfo(path,&info)) { if( create_file(path)) { free(data); return false; } } else set_file_size(path, 0); write_file(path, data, 0, len, &writes); return true; };