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- /**
- *
- * @file sysfs.c
- * @brief This file contains the functions providing the SysFS-interface.
- * @author Guillermo Marcus
- * @date 2010-03-01
- *
- */
- #include <linux/version.h>
- #include <linux/string.h>
- #include <linux/types.h>
- #include <linux/list.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
- #include <linux/cdev.h>
- #include <linux/wait.h>
- #include <linux/mm.h>
- #include <linux/pagemap.h>
- #include <linux/kernel.h>
- #include "compat.h"
- #include "config.h"
- #include "pciDriver.h"
- #include "common.h"
- #include "umem.h"
- #include "kmem.h"
- #include "sysfs.h"
- static SYSFS_GET_FUNCTION(pcidriver_show_kmem_entry);
- static SYSFS_GET_FUNCTION(pcidriver_show_umem_entry);
- /**
- *
- * Initializes the sysfs attributes for an kmem/umem-entry
- *
- */
- static int _pcidriver_sysfs_initialize(pcidriver_privdata_t *privdata,
- int id,
- struct class_device_attribute *sysfs_attr,
- const char *fmtstring,
- SYSFS_GET_FUNCTION((*callback)))
- {
- /* sysfs attributes for kmem buffers don’t make sense before 2.6.13, as
- we have no mmap support before */
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
- char namebuffer[16];
- /* allocate space for the name of the attribute */
- snprintf(namebuffer, sizeof(namebuffer), fmtstring, id);
- if ((sysfs_attr->attr.name = kstrdup(namebuffer, GFP_KERNEL)) == NULL)
- return -ENOMEM;
- sysfs_attr->attr.mode = S_IRUGO;
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24)
- // DS: Shall we lock now while accessing driver data structures???
- sysfs_attr->attr.owner = THIS_MODULE;
- #endif
- sysfs_attr->show = callback;
- sysfs_attr->store = NULL;
-
- /* name and add attribute */
- if (class_device_create_file(privdata->class_dev, sysfs_attr) != 0)
- return -ENXIO; /* Device not configured. Not the really best choice, but hm. */
- #endif
- return 0;
- }
- int pcidriver_sysfs_initialize_kmem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr)
- {
- return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "kbuf%d", pcidriver_show_kmem_entry);
- }
- int pcidriver_sysfs_initialize_umem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr)
- {
- return _pcidriver_sysfs_initialize(privdata, id, sysfs_attr, "umem%d", pcidriver_show_umem_entry);
- }
- /**
- *
- * Removes the file from sysfs and frees the allocated (kstrdup()) memory.
- *
- */
- void pcidriver_sysfs_remove(pcidriver_privdata_t *privdata, struct class_device_attribute *sysfs_attr)
- {
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
- class_device_remove_file(privdata->class_dev, sysfs_attr);
- kfree(sysfs_attr->attr.name);
- #endif
- }
- static SYSFS_GET_FUNCTION(pcidriver_show_kmem_entry)
- {
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- /* As we can be sure that attr.name contains a filename which we
- * created (see _pcidriver_sysfs_initialize), we do not need to have
- * sanity checks but can directly call simple_strtol() */
- int id = simple_strtol(attr->attr.name + strlen("kbuf"), NULL, 10);
- pcidriver_kmem_entry_t *entry = pcidriver_kmem_find_entry_id(privdata, id);
- if (entry) {
- unsigned long addr = entry->cpua;
- unsigned long dma_addr = entry->dma_handle;
-
- if (entry->size >= 16) {
- pcidriver_kmem_sync_entry(privdata, entry, PCILIB_KMEM_SYNC_FROMDEVICE);
- return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\ndata: %8x %8x %8x %8x\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode, *(u32*)(entry->cpua), *(u32*)(entry->cpua + 4), *(u32*)(entry->cpua + 8), *(u32*)(entry->cpua + 12));
- } else
- return snprintf(buf, PAGE_SIZE, "buffer: %d\naddr: %lx\nhw addr: %llx\nbus addr: %lx\ntype: %lx\nuse: 0x%lx\nitem: %lu\nsize: %lu\nrefs: %lu\nhw ref: %i\nmode: 0x%lx\n", id, addr, virt_to_phys((void*)addr), dma_addr, entry->type, entry->use, entry->item, entry->size, entry->refs&KMEM_REF_COUNT, (entry->refs&KMEM_REF_HW)?1:0, entry->mode);
- } else
- return snprintf(buf, PAGE_SIZE, "I am in the kmem_entry show function for buffer %d\n", id);
- #else
- return 0;
- #endif
- }
- static SYSFS_GET_FUNCTION(pcidriver_show_umem_entry)
- {
- #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13)
- #if 0
- pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)cls->class_data;
- return snprintf(buf, PAGE_SIZE, "I am in the umem_entry show function, class_device_kobj_name: %s\n", cls->kobj.name);
- #endif
- return 0;
- #else
- return 0;
- #endif
- }
- #ifdef ENABLE_IRQ
- SYSFS_GET_FUNCTION(pcidriver_show_irq_count)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- return snprintf(buf, PAGE_SIZE, "%d\n", privdata->irq_count);
- }
- SYSFS_GET_FUNCTION(pcidriver_show_irq_queues)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- int i, offset;
- /* output will be truncated to PAGE_SIZE */
- offset = snprintf(buf, PAGE_SIZE, "Queue\tOutstanding IRQs\n");
- for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++)
- offset += snprintf(buf+offset, PAGE_SIZE-offset, "%d\t%d\n", i, atomic_read(&(privdata->irq_outstanding[i])) );
- return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
- }
- #endif
- SYSFS_GET_FUNCTION(pcidriver_show_mmap_mode)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_mode);
- }
- SYSFS_SET_FUNCTION(pcidriver_store_mmap_mode)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- int mode = -1;
- /* Set the mmap-mode if it is either PCIDRIVER_MMAP_PCI or PCIDRIVER_MMAP_KMEM */
- if (sscanf(buf, "%d", &mode) == 1 &&
- (mode == PCIDRIVER_MMAP_PCI || mode == PCIDRIVER_MMAP_KMEM))
- privdata->mmap_mode = mode;
- return strlen(buf);
- }
- SYSFS_GET_FUNCTION(pcidriver_show_mmap_area)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- return snprintf(buf, PAGE_SIZE, "%d\n", privdata->mmap_area);
- }
- SYSFS_SET_FUNCTION(pcidriver_store_mmap_area)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- int temp = -1;
- sscanf(buf, "%d", &temp);
- if ((temp >= PCIDRIVER_BAR0) && (temp <= PCIDRIVER_BAR5))
- privdata->mmap_area = temp;
- return strlen(buf);
- }
- SYSFS_GET_FUNCTION(pcidriver_show_kmem_count)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&(privdata->kmem_count)));
- }
- SYSFS_SET_FUNCTION(pcidriver_store_kmem_alloc)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- kmem_handle_t kmem_handle;
- /* FIXME: guillermo: is validation of parsing an unsigned int enough? */
- if (sscanf(buf, "%lu", &kmem_handle.size) == 1)
- pcidriver_kmem_alloc(privdata, &kmem_handle);
- return strlen(buf);
- }
- SYSFS_SET_FUNCTION(pcidriver_store_kmem_free)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- unsigned int id;
- pcidriver_kmem_entry_t *kmem_entry;
- /* Parse the ID of the kernel memory to be freed, check bounds */
- if (sscanf(buf, "%u", &id) != 1 ||
- (id >= atomic_read(&(privdata->kmem_count))))
- goto err;
- if ((kmem_entry = pcidriver_kmem_find_entry_id(privdata,id)) == NULL)
- goto err;
- pcidriver_kmem_free_entry(privdata, kmem_entry );
- err:
- return strlen(buf);
- }
- SYSFS_GET_FUNCTION(pcidriver_show_kbuffers)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- int offset = 0;
- struct list_head *ptr;
- pcidriver_kmem_entry_t *entry;
- /* print the header */
- offset += snprintf(buf, PAGE_SIZE, "kbuf#\tcpu addr\tsize\n");
- spin_lock(&(privdata->kmemlist_lock));
- list_for_each(ptr, &(privdata->kmem_list)) {
- entry = list_entry(ptr, pcidriver_kmem_entry_t, list);
- /* print entry info */
- if (offset > PAGE_SIZE) {
- spin_unlock( &(privdata->kmemlist_lock) );
- return PAGE_SIZE;
- }
- offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%08lx\t%lu\n", entry->id, (unsigned long)(entry->dma_handle), entry->size );
- }
- spin_unlock(&(privdata->kmemlist_lock));
- /* output will be truncated to PAGE_SIZE */
- return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
- }
- SYSFS_GET_FUNCTION(pcidriver_show_umappings)
- {
- int offset = 0;
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- struct list_head *ptr;
- pcidriver_umem_entry_t *entry;
- /* print the header */
- offset += snprintf(buf, PAGE_SIZE, "umap#\tn_pages\tsg_ents\n");
- spin_lock( &(privdata->umemlist_lock) );
- list_for_each( ptr, &(privdata->umem_list) ) {
- entry = list_entry(ptr, pcidriver_umem_entry_t, list );
- /* print entry info */
- if (offset > PAGE_SIZE) {
- spin_unlock( &(privdata->umemlist_lock) );
- return PAGE_SIZE;
- }
- offset += snprintf(buf+offset, PAGE_SIZE-offset, "%3d\t%lu\t%lu\n", entry->id,
- (unsigned long)(entry->nr_pages), (unsigned long)(entry->nents));
- }
- spin_unlock( &(privdata->umemlist_lock) );
- /* output will be truncated to PAGE_SIZE */
- return (offset > PAGE_SIZE ? PAGE_SIZE : offset+1);
- }
- SYSFS_SET_FUNCTION(pcidriver_store_umem_unmap)
- {
- pcidriver_privdata_t *privdata = SYSFS_GET_PRIVDATA;
- pcidriver_umem_entry_t *umem_entry;
- unsigned int id;
- if (sscanf(buf, "%u", &id) != 1 ||
- (id >= atomic_read(&(privdata->umem_count))))
- goto err;
- if ((umem_entry = pcidriver_umem_find_entry_id(privdata, id)) == NULL)
- goto err;
- pcidriver_umem_sgunmap(privdata, umem_entry);
- err:
- return strlen(buf);
- }
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