diff options
Diffstat (limited to 'driver')
| -rw-r--r-- | driver/Makefile | 49 | ||||
| -rw-r--r-- | driver/base.c | 676 | ||||
| -rw-r--r-- | driver/base.h | 85 | ||||
| -rw-r--r-- | driver/common.h | 108 | ||||
| -rw-r--r-- | driver/compat.h | 198 | ||||
| -rw-r--r-- | driver/config.h | 23 | ||||
| -rw-r--r-- | driver/int.c | 258 | ||||
| -rw-r--r-- | driver/int.h | 9 | ||||
| -rw-r--r-- | driver/ioctl.c | 471 | ||||
| -rw-r--r-- | driver/ioctl.h | 5 | ||||
| -rw-r--r-- | driver/kmem.c | 657 | ||||
| -rw-r--r-- | driver/kmem.h | 9 | ||||
| -rw-r--r-- | driver/pciDriver.h | 217 | ||||
| -rw-r--r-- | driver/sysfs.c | 308 | ||||
| -rw-r--r-- | driver/sysfs.h | 23 | ||||
| -rw-r--r-- | driver/umem.c | 438 | ||||
| -rw-r--r-- | driver/umem.h | 5 |
17 files changed, 0 insertions, 3539 deletions
diff --git a/driver/Makefile b/driver/Makefile deleted file mode 100644 index e353228..0000000 --- a/driver/Makefile +++ /dev/null @@ -1,49 +0,0 @@ - -obj-m := pciDriver.o -pciDriver-objs := base.o int.o umem.o kmem.o sysfs.o ioctl.o - -KERNELDIR ?= /lib/modules/$(shell uname -r)/build -INSTALLDIR ?= /lib/modules/$(shell uname -r)/extra -PWD := $(shell pwd) - -EXTRA_CFLAGS += -I$(M)/.. - -default: - @KERNEL_GCC_VERSION=`cat /proc/version | head -n1 | cut -d " " -f 7` ;\ - GCC_VERSION=`$(CC) --version | head -n 1 | tr ' ' '\n' | grep -e "[0-9]\+\.[0-9]" | tail -n 1` ;\ - if [ $$KERNEL_GCC_VERSION != $$GCC_VERSION ]; then \ - echo "Kernel is compiled with gcc $$KERNEL_GCC_VERSION, but you are now using $$GCC_VERSION" ;\ - GCC_MAJOR=`echo $$KERNEL_GCC_VERSION | cut -d "." -f 1-2` ;\ - newCC=gcc-$$GCC_MAJOR ;\ - CC=`which $$newCC 2>/dev/null` ;\ - if [ $$? -ne 0 ]; then \ - echo "No compiler of $$GCC_MAJOR series is installed" ;\ - exit 1 ;\ - fi ;\ - GCC_VERSION=`$$CC --version | head -n 1 | tr ' ' '\n' | grep -e "[0-9]\+\.[0-9]" | head -n 1` ;\ - if [ $$KERNEL_GCC_VERSION != $$GCC_VERSION ]; then \ - echo "The $$GCC_VERSION of $$GCC_MAJOR series is installed" ;\ - exit 1 ;\ - fi ;\ - echo "Setting CC to $$newCC" ;\ - else \ - CC=$(CC) ;\ - fi ;\ - $(MAKE) $(CFLAGS) -C $(KERNELDIR) M=$(PWD) CC=$$CC modules - -install: - @mkdir -p $(INSTALLDIR) - @echo "INSTALL $(INSTALLDIR)/pciDriver.ko" - @install -m 755 pciDriver.ko $(INSTALLDIR) - @echo "INSTALL /usr/include/pciDriver/driver/pciDriver.h" - @mkdir -p /usr/include/pciDriver/driver - @install -m 644 pciDriver.h /usr/include/pciDriver/driver - -uninstall: - @echo "UNINSTALL $(INSTALLDIR)/pciDriver.ko" - @rm -f $(INSTALLDIR)/pciDriver.ko - @echo "UNINSTALL /usr/include/pciDriver/driver/pciDriver.h" - @rm -rf /usr/include/pciDriver/driver - -clean: - rm -rf *.o *.ko *.mod.c .*.o.cmd .*.o.tmp .*.ko.cmd .*.o *.symvers modules.order .tmp_versions diff --git a/driver/base.c b/driver/base.c deleted file mode 100644 index 974224d..0000000 --- a/driver/base.c +++ /dev/null @@ -1,676 +0,0 @@ -/** - * - * @file base.c - * @author Guillermo Marcus - * @date 2009-04-05 - * @brief Contains the main code which connects all the different parts and does - * basic driver tasks like initialization. - * - * This is a full rewrite of the pciDriver. - * New default is to support kernel 2.6, using kernel 2.6 APIs. - * - */ - -/* - * Change History: - * - * $Log: not supported by cvs2svn $ - * Revision 1.13 2008-05-30 11:38:15 marcus - * Added patches for kernel 2.6.24 - * - * Revision 1.12 2008-01-24 14:21:36 marcus - * Added a CLEAR_INTERRUPT_QUEUE ioctl. - * Added a sysfs attribute to show the outstanding IRQ queues. - * - * Revision 1.11 2008-01-24 12:53:11 marcus - * Corrected wait_event condition in waiti_ioctl. Improved the loop too. - * - * Revision 1.10 2008-01-14 10:39:39 marcus - * Set some messages as debug instead of normal. - * - * Revision 1.9 2008-01-11 10:18:28 marcus - * Modified interrupt mechanism. Added atomic functions and queues, to address race conditions. Removed unused interrupt code. - * - * Revision 1.8 2007-07-17 13:15:55 marcus - * Removed Tasklets. - * Using newest map for the ABB interrupts. - * - * Revision 1.7 2007-07-06 15:56:04 marcus - * Change default status for OLD_REGISTERS to not defined. - * - * Revision 1.6 2007-07-05 15:29:59 marcus - * Corrected issue with the bar mapping for interrupt handling. - * Added support up to kernel 2.6.20 - * - * Revision 1.5 2007-05-29 07:50:18 marcus - * Split code into 2 files. May get merged in the future again.... - * - * Revision 1.4 2007/03/01 17:47:34 marcus - * Fixed bug when the kernel memory was less than one page, it was not locked properly, recalling an old mapping issue in this case. - * - * Revision 1.3 2007/03/01 17:01:22 marcus - * comment fix (again). - * - * Revision 1.2 2007/03/01 17:00:25 marcus - * Changed some comment in the log. - * - * Revision 1.1 2007/03/01 16:57:43 marcus - * Divided driver file to ease the interrupt hooks for the user of the driver. - * Modified Makefile accordingly. - * - * From pciDriver.c: - * Revision 1.11 2006/12/11 16:15:43 marcus - * Fixed kernel buffer mmapping, and driver crash when application crashes. - * Buffer memory is now marked reserved during allocation, and mmaped with - * remap_xx_range. - * - * Revision 1.10 2006/11/21 09:50:49 marcus - * Added PROGRAPE4 vendor/device IDs. - * - * Revision 1.9 2006/11/17 18:47:36 marcus - * Removed MERGE_SGENTRIES flag, now it is selected at runtime with 'type'. - * Removed noncached in non-prefetchable areas, to allow the use of MTRRs. - * - * Revision 1.8 2006/11/17 16:41:21 marcus - * Added slot number to the PCI info IOctl. - * - * Revision 1.7 2006/11/13 12:30:34 marcus - * Added a IOctl call, to confiure the interrupt response. (testing pending). - * Basic interrupts are now supported, using a Tasklet and Completions. - * - * Revision 1.6 2006/11/08 21:30:02 marcus - * Added changes after compile tests in kernel 2.6.16 - * - * Revision 1.5 2006/10/31 07:57:38 marcus - * Improved the pfn calculation in nopage(), to deal with some possible border - * conditions. It was really no issue, because they are normally page-aligned - * anyway, but to be on the safe side. - * - * Revision 1.4 2006/10/30 19:37:40 marcus - * Solved bug on kernel memory not mapping properly. - * - * Revision 1.3 2006/10/18 11:19:20 marcus - * Added kernel 2.6.8 support based on comments from Joern Adamczewski (GSI). - * - * Revision 1.2 2006/10/18 11:04:15 marcus - * Bus Master is only activated when we detect a specific board. - * - * Revision 1.1 2006/10/10 14:46:51 marcus - * Initial commit of the new pciDriver for kernel 2.6 - * - * Revision 1.9 2006/10/05 11:30:46 marcus - * Prerelease. Added bus and devfn to pciInfo for compatibility. - * - * Revision 1.8 2006/09/25 16:51:07 marcus - * Added PCI config IOctls, and implemented basic mmap functions. - * - * Revision 1.7 2006/09/20 11:12:41 marcus - * Added Merge SG entries - * - * Revision 1.6 2006/09/19 17:22:18 marcus - * backup commit. - * - * Revision 1.5 2006/09/18 17:13:11 marcus - * backup commit. - * - * Revision 1.4 2006/09/15 15:44:41 marcus - * backup commit. - * - * Revision 1.3 2006/08/15 11:40:02 marcus - * backup commit. - * - * Revision 1.2 2006/08/12 18:28:42 marcus - * Sync with the laptop - * - * Revision 1.1 2006/08/11 15:30:46 marcus - * Sync with the laptop - * - */ - -#include <linux/version.h> - -/* Check macros and kernel version first */ -#ifndef KERNEL_VERSION -#error "No KERNEL_VERSION macro! Stopping." -#endif - -#ifndef LINUX_VERSION_CODE -#error "No LINUX_VERSION_CODE macro! Stopping." -#endif - -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8) -#error "This driver has been tested only for Kernel 2.6.8 or above." -#endif - -/* Required includes */ -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/cdev.h> -#include <linux/sysfs.h> -#include <asm/atomic.h> -#include <linux/pagemap.h> -#include <linux/spinlock.h> -#include <linux/list.h> -#include <asm/scatterlist.h> -#include <linux/vmalloc.h> -#include <linux/stat.h> -#include <linux/interrupt.h> -#include <linux/wait.h> - -/* Configuration for the driver (what should be compiled in, module name, etc...) */ -#include "config.h" - -/* Compatibility functions/definitions (provides functions which are not available on older kernels) */ -#include "compat.h" - -/* External interface for the driver */ -#include "pciDriver.h" - -/* Internal definitions for all parts (prototypes, data, macros) */ -#include "common.h" - -/* Internal definitions for the base part */ -#include "base.h" - -/* Internal definitions of the IRQ handling part */ -#include "int.h" - -/* Internal definitions for kernel memory */ -#include "kmem.h" - -/* Internal definitions for user space memory */ -#include "umem.h" - -#include "ioctl.h" - -/*************************************************************************/ -/* Module device table associated with this driver */ -MODULE_DEVICE_TABLE(pci, pcidriver_ids); - -/* Module init and exit points */ -module_init(pcidriver_init); -module_exit(pcidriver_exit); - -/* Module info */ -MODULE_AUTHOR("Guillermo Marcus"); -MODULE_DESCRIPTION("Simple PCI Driver"); -MODULE_LICENSE("GPL v2"); - -/* Module class */ -static struct class_compat *pcidriver_class; - -/** - * - * Called when loading the driver - * - */ -static int __init pcidriver_init(void) -{ - int err; - - /* Initialize the device count */ - atomic_set(&pcidriver_deviceCount, 0); - - /* Allocate character device region dynamically */ - if ((err = alloc_chrdev_region(&pcidriver_devt, MINORNR, MAXDEVICES, NODENAME)) != 0) { - mod_info("Couldn't allocate chrdev region. Module not loaded.\n"); - goto init_alloc_fail; - } - mod_info("Major %d allocated to nodename '%s'\n", MAJOR(pcidriver_devt), NODENAME); - - /* Register driver class */ - pcidriver_class = class_create(THIS_MODULE, NODENAME); - - if (IS_ERR(pcidriver_class)) { - mod_info("No sysfs support. Module not loaded.\n"); - goto init_class_fail; - } - - /* Register PCI driver. This function returns the number of devices on some - * systems, therefore check for errors as < 0. */ - if ((err = pci_register_driver(&pcidriver_driver)) < 0) { - mod_info("Couldn't register PCI driver. Module not loaded.\n"); - goto init_pcireg_fail; - } - - mod_info("Module loaded\n"); - - return 0; - -init_pcireg_fail: - class_destroy(pcidriver_class); -init_class_fail: - unregister_chrdev_region(pcidriver_devt, MAXDEVICES); -init_alloc_fail: - return err; -} - -/** - * - * Called when unloading the driver - * - */ -static void pcidriver_exit(void) -{ - pci_unregister_driver(&pcidriver_driver); - unregister_chrdev_region(pcidriver_devt, MAXDEVICES); - - if (pcidriver_class != NULL) - class_destroy(pcidriver_class); - - mod_info("Module unloaded\n"); -} - -/*************************************************************************/ -/* Driver functions */ - -/** - * - * This struct defines the PCI entry points. - * Will be registered at module init. - * - */ -static struct pci_driver pcidriver_driver = { - .name = MODNAME, - .id_table = pcidriver_ids, - .probe = pcidriver_probe, - .remove = pcidriver_remove, -}; - -/** - * - * This function is called when installing the driver for a device - * @param pdev Pointer to the PCI device - * - */ -static int __devinit pcidriver_probe(struct pci_dev *pdev, const struct pci_device_id *id) -{ - int err; - int devno; - pcidriver_privdata_t *privdata; - int devid; - - /* At the moment there is no difference between these boards here, other than - * printing a different message in the log. - * - * However, there is some difference in the interrupt handling functions. - */ - if (id->vendor == PCIE_XILINX_VENDOR_ID) { - if (id->device == PCIE_ML605_DEVICE_ID) { - mod_info("Found ML605 board at %s\n", dev_name(&pdev->dev)); - } else if (id->device == PCIE_IPECAMERA_DEVICE_ID) { - mod_info("Found IPE Camera at %s\n", dev_name(&pdev->dev)); - } else if (id->device == PCIE_KAPTURE_DEVICE_ID) { - mod_info("Found KAPTURE board at %s\n", dev_name(&pdev->dev)); - } else { - mod_info("Found unknown Xilinx device (%x) at %s\n", id->device, dev_name(&pdev->dev)); - } - } else { - /* It is something else */ - mod_info( "Found unknown board (%x:%x) at %s\n", id->vendor, id->device, dev_name(&pdev->dev)); - } - - /* Enable the device */ - if ((err = pci_enable_device(pdev)) != 0) { - mod_info("Couldn't enable device\n"); - goto probe_pcien_fail; - } - - /* Bus master & dma */ - if ((id->vendor == PCIE_XILINX_VENDOR_ID)&&(id->device == PCIE_IPECAMERA_DEVICE_ID)) { - pci_set_master(pdev); - - err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); - if (err < 0) { - printk(KERN_ERR "pci_set_dma_mask failed\n"); - goto probe_dma_fail; - } - } - - /* Set Memory-Write-Invalidate support */ - if ((err = pci_set_mwi(pdev)) != 0) - mod_info("MWI not supported. Continue without enabling MWI.\n"); - - /* Get / Increment the device id */ - devid = atomic_inc_return(&pcidriver_deviceCount) - 1; - if (devid >= MAXDEVICES) { - mod_info("Maximum number of devices reached! Increase MAXDEVICES.\n"); - err = -ENOMSG; - goto probe_maxdevices_fail; - } - - /* Allocate and initialize the private data for this device */ - if ((privdata = kcalloc(1, sizeof(*privdata), GFP_KERNEL)) == NULL) { - err = -ENOMEM; - goto probe_nomem; - } - - INIT_LIST_HEAD(&(privdata->kmem_list)); - spin_lock_init(&(privdata->kmemlist_lock)); - atomic_set(&privdata->kmem_count, 0); - - INIT_LIST_HEAD(&(privdata->umem_list)); - spin_lock_init(&(privdata->umemlist_lock)); - atomic_set(&privdata->umem_count, 0); - - pci_set_drvdata( pdev, privdata ); - privdata->pdev = pdev; - - /* Device add to sysfs */ - devno = MKDEV(MAJOR(pcidriver_devt), MINOR(pcidriver_devt) + devid); - privdata->devno = devno; - if (pcidriver_class != NULL) { - /* FIXME: some error checking missing here */ - privdata->class_dev = class_device_create(pcidriver_class, NULL, devno, &(pdev->dev), NODENAMEFMT, MINOR(pcidriver_devt) + devid, privdata); - class_set_devdata( privdata->class_dev, privdata ); - mod_info("Device /dev/%s%d added\n",NODENAME,MINOR(pcidriver_devt) + devid); - } - - /* Setup mmaped BARs into kernel space */ - if ((err = pcidriver_probe_irq(privdata)) != 0) - goto probe_irq_probe_fail; - - /* Populate sysfs attributes for the class device */ - /* TODO: correct errorhandling. ewww. must remove the files in reversed order :-( */ - #define sysfs_attr(name) do { \ - if (class_device_create_file(sysfs_attr_def_pointer, &sysfs_attr_def_name(name)) != 0) \ - goto probe_device_create_fail; \ - } while (0) - #ifdef ENABLE_IRQ - sysfs_attr(irq_count); - sysfs_attr(irq_queues); - #endif - - sysfs_attr(mmap_mode); - sysfs_attr(mmap_area); - sysfs_attr(kmem_count); - sysfs_attr(kmem_alloc); - sysfs_attr(kmem_free); - sysfs_attr(kbuffers); - sysfs_attr(umappings); - sysfs_attr(umem_unmap); - #undef sysfs_attr - - /* Register character device */ - cdev_init( &(privdata->cdev), &pcidriver_fops ); - privdata->cdev.owner = THIS_MODULE; - privdata->cdev.ops = &pcidriver_fops; - err = cdev_add( &privdata->cdev, devno, 1 ); - if (err) { - mod_info( "Couldn't add character device.\n" ); - goto probe_cdevadd_fail; - } - - return 0; - -probe_device_create_fail: -probe_cdevadd_fail: -probe_irq_probe_fail: - pcidriver_irq_unmap_bars(privdata); - kfree(privdata); -probe_nomem: - atomic_dec(&pcidriver_deviceCount); -probe_maxdevices_fail: -probe_dma_fail: - pci_disable_device(pdev); -probe_pcien_fail: - return err; -} - -/** - * - * This function is called when disconnecting a device - * - */ -static void __devexit pcidriver_remove(struct pci_dev *pdev) -{ - pcidriver_privdata_t *privdata; - - /* Get private data from the device */ - privdata = pci_get_drvdata(pdev); - - /* Removing sysfs attributes from class device */ - #define sysfs_attr(name) do { \ - class_device_remove_file(sysfs_attr_def_pointer, &sysfs_attr_def_name(name)); \ - } while (0) - #ifdef ENABLE_IRQ - sysfs_attr(irq_count); - sysfs_attr(irq_queues); - #endif - - sysfs_attr(mmap_mode); - sysfs_attr(mmap_area); - sysfs_attr(kmem_count); - sysfs_attr(kmem_alloc); - sysfs_attr(kmem_free); - sysfs_attr(kbuffers); - sysfs_attr(umappings); - sysfs_attr(umem_unmap); - #undef sysfs_attr - - /* Free all allocated kmem buffers before leaving */ - pcidriver_kmem_free_all( privdata ); - -#ifdef ENABLE_IRQ - pcidriver_remove_irq(privdata); -#endif - - /* Removing Character device */ - cdev_del(&(privdata->cdev)); - - /* Removing the device from sysfs */ - class_device_destroy(pcidriver_class, privdata->devno); - - /* Releasing privdata */ - kfree(privdata); - - /* Disabling PCI device */ - pci_disable_device(pdev); - - mod_info("Device at %s removed\n", dev_name(&pdev->dev)); -} - -/*************************************************************************/ -/* File operations */ -/*************************************************************************/ - -/** - * This struct defines the file operation entry points. - * - * @see pcidriver_ioctl - * @see pcidriver_mmap - * @see pcidriver_open - * @see pcidriver_release - * - */ -static struct file_operations pcidriver_fops = { - .owner = THIS_MODULE, -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11) - .ioctl = pcidriver_ioctl, -#else - .unlocked_ioctl = pcidriver_ioctl, -#endif - .mmap = pcidriver_mmap, - .open = pcidriver_open, - .release = pcidriver_release, -}; - -void pcidriver_module_get(pcidriver_privdata_t *privdata) { - atomic_inc(&(privdata->refs)); -// mod_info("Ref: %i\n", atomic_read(&(privdata->refs))); -} - -void pcidriver_module_put(pcidriver_privdata_t *privdata) { - if (atomic_add_negative(-1, &(privdata->refs))) { - atomic_inc(&(privdata->refs)); - mod_info("Reference counting error..."); - } else { -// mod_info("Unref: %i\n", atomic_read(&(privdata->refs))); - } -} - -/** - * - * Called when an application open()s a /dev/fpga*, attaches the private data - * with the file pointer. - * - */ -int pcidriver_open(struct inode *inode, struct file *filp) -{ - pcidriver_privdata_t *privdata; - - /* Set the private data area for the file */ - privdata = container_of( inode->i_cdev, pcidriver_privdata_t, cdev); - filp->private_data = privdata; - - pcidriver_module_get(privdata); - - return 0; -} - -/** - * - * Called when the application close()s the file descriptor. Does nothing at - * the moment. - * - */ -int pcidriver_release(struct inode *inode, struct file *filp) -{ - pcidriver_privdata_t *privdata; - - /* Get the private data area */ - privdata = filp->private_data; - - pcidriver_module_put(privdata); - - return 0; -} - -/** - * - * This function is the entry point for mmap() and calls either pcidriver_mmap_pci - * or pcidriver_mmap_kmem - * - * @see pcidriver_mmap_pci - * @see pcidriver_mmap_kmem - * - */ -int pcidriver_mmap(struct file *filp, struct vm_area_struct *vma) -{ - pcidriver_privdata_t *privdata; - int ret = 0, bar; - - mod_info_dbg("Entering mmap\n"); - - /* Get the private data area */ - privdata = filp->private_data; - - /* Check the current mmap mode */ - switch (privdata->mmap_mode) { - case PCIDRIVER_MMAP_PCI: - /* Mmap a PCI region */ - switch (privdata->mmap_area) { - case PCIDRIVER_BAR0: bar = 0; break; - case PCIDRIVER_BAR1: bar = 1; break; - case PCIDRIVER_BAR2: bar = 2; break; - case PCIDRIVER_BAR3: bar = 3; break; - case PCIDRIVER_BAR4: bar = 4; break; - case PCIDRIVER_BAR5: bar = 5; break; - default: - mod_info("Attempted to mmap a PCI area with the wrong mmap_area value: %d\n",privdata->mmap_area); - return -EINVAL; /* invalid parameter */ - break; - } - ret = pcidriver_mmap_pci(privdata, vma, bar); - break; - case PCIDRIVER_MMAP_KMEM: - /* mmap a Kernel buffer */ - ret = pcidriver_mmap_kmem(privdata, vma); - break; - default: - mod_info( "Invalid mmap_mode value (%d)\n",privdata->mmap_mode ); - return -EINVAL; /* Invalid parameter (mode) */ - } - - return ret; -} - -/*************************************************************************/ -/* Internal driver functions */ -int pcidriver_mmap_pci(pcidriver_privdata_t *privdata, struct vm_area_struct *vmap, int bar) -{ - int ret = 0; - unsigned long bar_addr; - unsigned long bar_length, vma_size; - unsigned long bar_flags; - - mod_info_dbg("Entering mmap_pci\n"); - - /* Get info of the BAR to be mapped */ - bar_addr = pci_resource_start(privdata->pdev, bar); - bar_length = pci_resource_len(privdata->pdev, bar); - bar_flags = pci_resource_flags(privdata->pdev, bar); - - /* Check sizes */ - vma_size = (vmap->vm_end - vmap->vm_start); - - if ((vma_size != bar_length) && - ((bar_length < PAGE_SIZE) && (vma_size != PAGE_SIZE))) { - mod_info( "mmap size is not correct! bar: %lu - vma: %lu\n", bar_length, vma_size ); - return -EINVAL; - } - - if (bar_flags & IORESOURCE_IO) { - /* Unlikely case, we will mmap a IO region */ - - /* IO regions are never cacheable */ -#ifdef pgprot_noncached - vmap->vm_page_prot = pgprot_noncached(vmap->vm_page_prot); -#endif - - /* Map the BAR */ - ret = io_remap_pfn_range_compat( - vmap, - vmap->vm_start, - bar_addr, - bar_length, - vmap->vm_page_prot); - } else { - /* Normal case, mmap a memory region */ - - /* Ensure this VMA is non-cached, if it is not flaged as prefetchable. - * If it is prefetchable, caching is allowed and will give better performance. - * This should be set properly by the BIOS, but we want to be sure. */ - /* adapted from drivers/char/mem.c, mmap function. */ -#ifdef pgprot_noncached -/* Setting noncached disables MTRR registers, and we want to use them. - * So we take this code out. This can lead to caching problems if and only if - * the System BIOS set something wrong. Check LDDv3, page 425. - */ -// if (!(bar_flags & IORESOURCE_PREFETCH)) -// vmap->vm_page_prot = pgprot_noncached(vmap->vm_page_prot); -#endif - - /* Map the BAR */ - ret = remap_pfn_range_compat( - vmap, - vmap->vm_start, - bar_addr, - bar_length, - vmap->vm_page_prot); - } - - if (ret) { - mod_info("remap_pfn_range failed\n"); - return -EAGAIN; - } - - return 0; /* success */ -} diff --git a/driver/base.h b/driver/base.h deleted file mode 100644 index 9384e2d..0000000 --- a/driver/base.h +++ /dev/null @@ -1,85 +0,0 @@ -#ifndef _PCIDRIVER_BASE_H -#define _PCIDRIVER_BASE_H - -#include "sysfs.h" - -/** - * - * This file contains prototypes and data structures for internal use of the pciDriver. - * - * - */ - -/* prototypes for file_operations */ -static struct file_operations pcidriver_fops; -int pcidriver_mmap( struct file *filp, struct vm_area_struct *vmap ); -int pcidriver_open(struct inode *inode, struct file *filp ); -int pcidriver_release(struct inode *inode, struct file *filp); - -/* prototypes for device operations */ -static struct pci_driver pcidriver_driver; -static int __devinit pcidriver_probe(struct pci_dev *pdev, const struct pci_device_id *id); -static void __devexit pcidriver_remove(struct pci_dev *pdev); - - - -/* prototypes for module operations */ -static int __init pcidriver_init(void); -static void pcidriver_exit(void); - -/* - * This is the table of PCI devices handled by this driver by default - * If you want to add devices dynamically to this list, do: - * - * echo "vendor device" > /sys/bus/pci/drivers/pciDriver/new_id - * where vendor and device are in hex, without leading '0x'. - * - * The IDs themselves can be found in common.h - * - * For more info, see <kernel-source>/Documentation/pci.txt - * - * __devinitdata is applied because the kernel does not need those - * tables any more after boot is finished on systems which don't - * support hotplug. - * - */ - -static const __devinitdata struct pci_device_id pcidriver_ids[] = { - { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_ML605_DEVICE_ID ) }, // PCI-E Xilinx ML605 - { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_IPECAMERA_DEVICE_ID ) }, // PCI-E IPE Camera - { PCI_DEVICE( PCIE_XILINX_VENDOR_ID, PCIE_KAPTURE_DEVICE_ID ) }, // PCI-E KAPTURE board for HEB - {0,0,0,0}, -}; - -/* prototypes for internal driver functions */ -int pcidriver_pci_read( pcidriver_privdata_t *privdata, pci_cfg_cmd *pci_cmd ); -int pcidriver_pci_write( pcidriver_privdata_t *privdata, pci_cfg_cmd *pci_cmd ); -int pcidriver_pci_info( pcidriver_privdata_t *privdata, pcilib_board_info_t *pci_info ); - -int pcidriver_mmap_pci( pcidriver_privdata_t *privdata, struct vm_area_struct *vmap , int bar ); -int pcidriver_mmap_kmem( pcidriver_privdata_t *privdata, struct vm_area_struct *vmap ); - -/*************************************************************************/ -/* Static data */ -/* Hold the allocated major & minor numbers */ -static dev_t pcidriver_devt; - -/* Number of devices allocated */ -static atomic_t pcidriver_deviceCount; - -/* Sysfs attributes */ -static DEVICE_ATTR(mmap_mode, (S_IRUGO | S_IWUGO), pcidriver_show_mmap_mode, pcidriver_store_mmap_mode); -static DEVICE_ATTR(mmap_area, (S_IRUGO | S_IWUGO), pcidriver_show_mmap_area, pcidriver_store_mmap_area); -static DEVICE_ATTR(kmem_count, S_IRUGO, pcidriver_show_kmem_count, NULL); -static DEVICE_ATTR(kbuffers, S_IRUGO, pcidriver_show_kbuffers, NULL); -static DEVICE_ATTR(kmem_alloc, S_IWUGO, NULL, pcidriver_store_kmem_alloc); -static DEVICE_ATTR(kmem_free, S_IWUGO, NULL, pcidriver_store_kmem_free); -static DEVICE_ATTR(umappings, S_IRUGO, pcidriver_show_umappings, NULL); -static DEVICE_ATTR(umem_unmap, S_IWUGO, NULL, pcidriver_store_umem_unmap); - -#ifdef ENABLE_IRQ -static DEVICE_ATTR(irq_count, S_IRUGO, pcidriver_show_irq_count, NULL); -static DEVICE_ATTR(irq_queues, S_IRUGO, pcidriver_show_irq_queues, NULL); -#endif - -#endif diff --git a/driver/common.h b/driver/common.h deleted file mode 100644 index eba56d7..0000000 --- a/driver/common.h +++ /dev/null @@ -1,108 +0,0 @@ -#ifndef _PCIDRIVER_COMMON_H -#define _PCIDRIVER_COMMON_H - -#include "pcilib_types.h" - -/*************************************************************************/ -/* Private data types and structures */ - - -/* Define an entry in the kmem list (this list is per device) */ -/* This list keeps references to the allocated kernel buffers */ -typedef struct { - int id; - enum dma_data_direction direction; - - struct list_head list; - dma_addr_t dma_handle; - unsigned long cpua; - unsigned long size; - unsigned long type; - unsigned long align; - - unsigned long use; - unsigned long item; - - spinlock_t lock; - unsigned long mode; - unsigned long refs; - - struct class_device_attribute sysfs_attr; /* initialized when adding the entry */ -} pcidriver_kmem_entry_t; - -/* Define an entry in the umem list (this list is per device) */ -/* This list keeps references to the SG lists for each mapped userspace region */ -typedef struct { - int id; - struct list_head list; - unsigned int nr_pages; /* number of pages for this user memeory area */ - struct page **pages; /* list of pointers to the pages */ - unsigned int nents; /* actual entries in the scatter/gatter list (NOT nents for the map function, but the result) */ - struct scatterlist *sg; /* list of sg entries */ - struct class_device_attribute sysfs_attr; /* initialized when adding the entry */ -} pcidriver_umem_entry_t; - -/* Hold the driver private data */ -typedef struct { - dev_t devno; /* device number (major and minor) */ - struct pci_dev *pdev; /* PCI device */ - struct class_device *class_dev; /* Class device */ - struct cdev cdev; /* char device struct */ - int mmap_mode; /* current mmap mode */ - int mmap_area; /* current PCI mmap area */ - -#ifdef ENABLE_IRQ - int irq_enabled; /* Non-zero if IRQ is enabled */ - int irq_count; /* Just an IRQ counter */ - - wait_queue_head_t irq_queues[ PCIDRIVER_INT_MAXSOURCES ]; - /* One queue per interrupt source */ - atomic_t irq_outstanding[ PCIDRIVER_INT_MAXSOURCES ]; - /* Outstanding interrupts per queue */ - volatile unsigned int *bars_kmapped[6]; /* PCI BARs mmapped in kernel space */ - -#endif - - spinlock_t kmemlist_lock; /* Spinlock to lock kmem list operations */ - struct list_head kmem_list; /* List of 'kmem_list_entry's associated with this device */ - atomic_t kmem_count; /* id for next kmem entry */ - - int kmem_cur_id; /* Currently selected kmem buffer, for mmap */ - - spinlock_t umemlist_lock; /* Spinlock to lock umem list operations */ - struct list_head umem_list; /* List of 'umem_list_entry's associated with this device */ - atomic_t umem_count; /* id for next umem entry */ - - int msi_mode; /* Flag specifying if interrupt have been initialized in MSI mode */ - atomic_t refs; /* Reference counter */ -} pcidriver_privdata_t; - - -void pcidriver_module_get(pcidriver_privdata_t *privdata); -void pcidriver_module_put(pcidriver_privdata_t *privdata); - -/*************************************************************************/ -/* Some nice defines that make code more readable */ -/* This is to print nice info in the log */ - -#ifdef DEBUG - #define mod_info( args... ) \ - do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\ - printk( args ); } while(0) - #define mod_info_dbg( args... ) \ - do { printk( KERN_INFO "%s - %s : ", MODNAME , __FUNCTION__ );\ - printk( args ); } while(0) -#else - #define mod_info( args... ) \ - do { printk( KERN_INFO "%s: ", MODNAME );\ - printk( args ); } while(0) - #define mod_info_dbg( args... ) -#endif - -#define mod_crit( args... ) \ - do { printk( KERN_CRIT "%s: ", MODNAME );\ - printk( args ); } while(0) - -#define MIN(a, b) ((a) < (b) ? (a) : (b)) - -#endif diff --git a/driver/compat.h b/driver/compat.h deleted file mode 100644 index 25e402a..0000000 --- a/driver/compat.h +++ /dev/null @@ -1,198 +0,0 @@ -/** - * - * @file compat.h - * @author Michael Stapelberg - * @date 2009-04-05 - * @brief Contains compatibility definitions for the different linux kernel versions to avoid - * putting ifdefs all over the driver code. - * - */ -#ifndef _COMPAT_H -#define _COMPAT_H - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0) -# define __devinit -# define __devexit -# define __devinitdata -#endif - -/* dev_name is the wrapper one needs to use to access what was formerly called - * bus_id in struct device. However, before 2.6.27, direct access was necessary, - * so we provide our own version. */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) -static inline const char *dev_name(struct device *dev) { - return dev->bus_id; -} -#endif - -/* SetPageLocked disappeared in v2.6.27 */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,27) - #define compat_lock_page SetPageLocked - #define compat_unlock_page ClearPageLocked -#else - /* in v2.6.28, __set_page_locked and __clear_page_locked was introduced */ - #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28) - #define compat_lock_page __set_page_locked - #define compat_unlock_page __clear_page_locked - #else - /* However, in v2.6.27 itself, neither of them is there, so - * we need to use our own function fiddling with bits inside - * the page struct :-\ */ - static inline void compat_lock_page(struct page *page) { - __set_bit(PG_locked, &page->flags); - } - - static inline void compat_unlock_page(struct page *page) { - __clear_bit(PG_locked, &page->flags); - } - #endif -#endif - -/* Before 2.6.13, simple_class was the standard interface. Nowadays, it's just called class */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,13) - - #define class_compat class_simple - - /* These functions are redirected to their old corresponding functions */ - #define class_create(module, name) class_simple_create(module, name) - #define class_destroy(type) class_simple_destroy(type) - #define class_device_destroy(unused, devno) class_simple_device_remove(devno) - #define class_device_create(type, unused, devno, devpointer, nameformat, minor, unused) \ - class_simple_device_add(type, devno, devpointer, nameformat, minor) - #define class_set_devdata(classdev, privdata) classdev->class_data = privdata - #define DEVICE_ATTR_COMPAT - #define sysfs_attr_def_name(name) class_device_attr_##name - #define sysfs_attr_def_pointer privdata->class_dev - #define SYSFS_GET_FUNCTION(name) ssize_t name(struct class_device *cls, char *buf) - #define SYSFS_SET_FUNCTION(name) ssize_t name(struct class_device *cls, const char *buf, size_t count) - #define SYSFS_GET_PRIVDATA (pcidriver_privdata_t*)cls->class_data - -#else - -/* In 2.6.26, device.h was changed quite significantly. Luckily, it only affected - type/function names, for the most part. */ -//#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,26) - #define class_device_attribute device_attribute - #define CLASS_DEVICE_ATTR DEVICE_ATTR - #define class_device device - #define class_data dev -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27) - #define class_device_create(type, parent, devno, devpointer, nameformat, minor, privdata) \ - device_create(type, parent, devno, privdata, nameformat, minor) -#else - #define class_device_create(type, parent, devno, devpointer, nameformat, minor, unused) \ - device_create(type, parent, devno, nameformat, minor) -#endif - #define class_device_create_file device_create_file - #define class_device_remove_file device_remove_file - #define class_device_destroy device_destroy - #define DEVICE_ATTR_COMPAT struct device_attribute *attr, - #define class_set_devdata dev_set_drvdata - - #define sysfs_attr_def_name(name) dev_attr_##name - #define sysfs_attr_def_pointer privdata->class_dev - #define SYSFS_GET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, char *buf) - #define SYSFS_SET_FUNCTION(name) ssize_t name(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) - #define SYSFS_GET_PRIVDATA dev_get_drvdata(dev) - -//#endif - -#define class_compat class - -#endif - -/* The arguments of IRQ handlers have been changed in 2.6.19. It's very likely that - int irq will disappear somewhen in the future (current is 2.6.29), too. */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19) - #define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id) -#else - #define IRQ_HANDLER_FUNC(name) irqreturn_t name(int irq, void *dev_id, struct pt_regs *regs) -#endif - -/* atomic_inc_return appeared in 2.6.9, at least in CERN scientific linux, provide - compatibility wrapper for older kernels */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9) -static int atomic_inc_return(atomic_t *variable) { - atomic_inc(variable); - return atomic_read(variable); -} -#endif - -/* sg_set_page is available starting at 2.6.24 */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) - -#define sg_set_page(sg, set_page, set_length, set_offset) do { \ - (sg)->page = set_page; \ - (sg)->length = set_length; \ - (sg)->offset = set_offset; \ -} while (0) - -#endif - -/* Before 2.6.20, disable was not an atomic counter, so this check was needed */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20) -#define pci_disable_device(pdev) do { \ - if (pdev->is_enabled) \ - pci_disable_device(pdev); \ -} while (0) -#endif - -/* Before 2.6.24, scatter/gather lists did not need to be initialized */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,24) - #define sg_init_table(sg, nr_pages) -#endif - -/* SA_SHIRQ was renamed to IRQF_SHARED in 2.6.24 */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24) - #define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, IRQF_SHARED, modname, privdata) -#else - #define request_irq(irq, irq_handler, modname, privdata) request_irq(irq, irq_handler, SA_SHIRQ, modname, privdata) -#endif - -/* In 2.6.13, io_remap_page_range was removed in favor for io_remap_pfn_range which works on - more platforms and allows more memory space */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,13) -#define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - io_remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot) -#else -#define io_remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - io_remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot) -#endif - -/* In 2.6.10, remap_pfn_range was introduced, see io_remap_pfn_range_compat */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,10) -#define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - remap_pfn_range(vmap, vm_start, (bar_addr >> PAGE_SHIFT), bar_length, vm_page_prot) - -#define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \ - remap_pfn_range(vmap, vm_start, page_to_pfn(virt_to_page((void*)cpua)), size, vm_page_prot) - -#else -#define remap_pfn_range_compat(vmap, vm_start, bar_addr, bar_length, vm_page_prot) \ - remap_page_range(vmap, vm_start, bar_addr, bar_length, vm_page_prot) - -#define remap_pfn_range_cpua_compat(vmap, vm_start, cpua, size, vm_page_prot) \ - remap_page_range(vmap, vm_start, virt_to_phys((void*)cpua), size, vm_page_prot) -#endif - -/** - * Go over the pages of the kmem buffer, and mark them as reserved. - * This is needed, otherwise mmaping the kernel memory to user space - * will fail silently (mmaping /dev/null) when using remap_xx_range. - */ -static inline void set_pages_reserved_compat(unsigned long cpua, unsigned long size) -{ - /* Starting in 2.6.15, the PG_RESERVED bit was removed. - See also http://lwn.net/Articles/161204/ */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15) - struct page *page, *last_page; - - page = virt_to_page(cpua); - last_page = virt_to_page(cpua + size - 1); - - for (; page <= last_page; page++) - SetPageReserved(page); -#endif -} - -#endif diff --git a/driver/config.h b/driver/config.h deleted file mode 100644 index c217afd..0000000 --- a/driver/config.h +++ /dev/null @@ -1,23 +0,0 @@ -/*******************************/ -/* Configuration of the driver */ -/*******************************/ - -/* Debug messages */ -//#define DEBUG - -/* Enable/disable IRQ handling */ -#define ENABLE_IRQ - -/* The name of the module */ -#define MODNAME "pciDriver" - -/* Major number is allocated dynamically */ -/* Minor number */ -#define MINORNR 0 - -/* Node name of the char device */ -#define NODENAME "fpga" -#define NODENAMEFMT "fpga%d" - -/* Maximum number of devices*/ -#define MAXDEVICES 4 diff --git a/driver/int.c b/driver/int.c deleted file mode 100644 index 5dbcb7f..0000000 --- a/driver/int.c +++ /dev/null @@ -1,258 +0,0 @@ -/** - * - * @file int.c - * @author Guillermo Marcus - * @date 2009-04-05 - * @brief Contains the interrupt handler. - * - */ - -/* - * Change History: - * - * $Log: not supported by cvs2svn $ - * Revision 1.7 2008-01-11 10:18:28 marcus - * Modified interrupt mechanism. Added atomic functions and queues, to address race conditions. Removed unused interrupt code. - * - * Revision 1.6 2007-11-04 20:58:22 marcus - * Added interrupt generator acknowledge. - * Fixed wrong operator. - * - * Revision 1.5 2007-10-31 15:42:21 marcus - * Added IG ack for testing, may be removed later. - * - * Revision 1.4 2007-07-17 13:15:56 marcus - * Removed Tasklets. - * Using newest map for the ABB interrupts. - * - * Revision 1.3 2007-07-05 15:30:30 marcus - * Added support for both register maps of the ABB. - * - * Revision 1.2 2007-05-29 07:50:18 marcus - * Split code into 2 files. May get merged in the future again.... - * - * Revision 1.1 2007/03/01 16:57:43 marcus - * Divided driver file to ease the interrupt hooks for the user of the driver. - * Modified Makefile accordingly. - * - */ - -#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/sched.h> -#include <stdbool.h> - -#include "config.h" - -#include "compat.h" - -#include "pciDriver.h" - -#include "common.h" - -#include "int.h" - -/* - * The ID between IRQ_SOURCE in irq_outstanding and the actual source is arbitrary. - * Therefore, be careful when communicating with multiple implementations. - */ - -/* IRQ_SOURCES */ -#define ABB_IRQ_CH0 0 -#define ABB_IRQ_CH1 1 -#define ABB_IRQ_IG 2 - -/* See ABB user’s guide, register definitions (3.1) */ -#define ABB_INT_ENABLE (0x0010 >> 2) -#define ABB_INT_STAT (0x0008 >> 2) - -#define ABB_INT_CH1_TIMEOUT (1 << 4) -#define ABB_INT_CH0_TIMEOUT (1 << 5) -#define ABB_INT_IG (1 << 2) -#define ABB_INT_CH0 (1 << 1) /* downstream */ -#define ABB_INT_CH1 (1) /* upstream */ - -#define ABB_CH0_CTRL (108 >> 2) -#define ABB_CH1_CTRL (72 >> 2) -#define ABB_CH_RESET (0x0201000A) -#define ABB_IG_CTRL (0x0080 >> 2) -#define ABB_IG_ACK (0x00F0) - -/** - * - * If IRQ-handling is enabled, this function will be called from pcidriver_probe - * to initialize the IRQ handling (maps the BARs) - * - */ -int pcidriver_probe_irq(pcidriver_privdata_t *privdata) -{ - unsigned char int_pin, int_line; - unsigned long bar_addr, bar_len, bar_flags; - int i; - int err; - - for (i = 0; i < 6; i++) - privdata->bars_kmapped[i] = NULL; - - for (i = 0; i < 6; i++) { - bar_addr = pci_resource_start(privdata->pdev, i); - bar_len = pci_resource_len(privdata->pdev, i); - bar_flags = pci_resource_flags(privdata->pdev, i); - - /* check if it is a valid BAR, skip if not */ - if ((bar_addr == 0) || (bar_len == 0)) - continue; - - /* Skip IO regions (map only mem regions) */ - if (bar_flags & IORESOURCE_IO) - continue; - - /* Check if the region is available */ - if ((err = pci_request_region(privdata->pdev, i, NULL)) != 0) { - mod_info( "Failed to request BAR memory region.\n" ); - return err; - } - - /* Map it into kernel space. */ - /* For x86 this is just a dereference of the pointer, but that is - * not portable. So we need to do the portable way. Thanks Joern! - */ - - /* respect the cacheable-bility of the region */ - if (bar_flags & IORESOURCE_PREFETCH) - privdata->bars_kmapped[i] = ioremap(bar_addr, bar_len); - else - privdata->bars_kmapped[i] = ioremap_nocache(bar_addr, bar_len); - - /* check for error */ - if (privdata->bars_kmapped[i] == NULL) { - mod_info( "Failed to remap BAR%d into kernel space.\n", i ); - return -EIO; - } - } - - /* Initialize the interrupt handler for this device */ - /* Initialize the wait queues */ - for (i = 0; i < PCIDRIVER_INT_MAXSOURCES; i++) { - init_waitqueue_head(&(privdata->irq_queues[i])); - atomic_set(&(privdata->irq_outstanding[i]), 0); - } - - /* Initialize the irq config */ - if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &int_pin)) != 0) { - /* continue without interrupts */ - int_pin = 0; - mod_info("Error getting the interrupt pin. Disabling interrupts for this device\n"); - } - - /* Disable interrupts and activate them if everything can be set up properly */ - privdata->irq_enabled = 0; - - if (int_pin == 0) - return 0; - - if ((err = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &int_line)) != 0) { - mod_info("Error getting the interrupt line. Disabling interrupts for this device\n"); - return 0; - } - - /* Enable interrupts using MSI mode */ - if (!pci_enable_msi(privdata->pdev)) - privdata->msi_mode = 1; - - /* register interrupt handler */ - if ((err = request_irq(privdata->pdev->irq, pcidriver_irq_handler, MODNAME, privdata)) != 0) { - mod_info("Error registering the interrupt handler. Disabling interrupts for this device\n"); - return 0; - } - - privdata->irq_enabled = 1; - mod_info("Registered Interrupt Handler at pin %i, line %i, IRQ %i\n", int_pin, int_line, privdata->pdev->irq ); - - return 0; -} - -/** - * - * Frees/cleans up the data structures, called from pcidriver_remove() - * - */ -void pcidriver_remove_irq(pcidriver_privdata_t *privdata) -{ - /* Release the IRQ handler */ - if (privdata->irq_enabled != 0) - free_irq(privdata->pdev->irq, privdata); - - if (privdata->msi_mode) { - pci_disable_msi(privdata->pdev); - privdata->msi_mode = 0; - } - - pcidriver_irq_unmap_bars(privdata); -} - -/** - * - * Unmaps the BARs and releases them - * - */ -void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata) -{ - int i; - - for (i = 0; i < 6; i++) { - if (privdata->bars_kmapped[i] == NULL) - continue; - - iounmap((void*)privdata->bars_kmapped[i]); - pci_release_region(privdata->pdev, i); - } -} - -/** - * - * Acknowledges the receival of an interrupt to the card. - * - * @returns true if the card was acknowledget - * @returns false if the interrupt was not for one of our cards - * - * @see check_acknowlegde_channel - * - */ -static bool pcidriver_irq_acknowledge(pcidriver_privdata_t *privdata) -{ - int channel = 0; -// volatile unsigned int *bar; -// bar = privdata->bars_kmapped[0]; -// mod_info_dbg("interrupt registers. ISR: %x, IER: %x\n", bar[ABB_INT_STAT], bar[ABB_INT_ENABLE]); - - atomic_inc(&(privdata->irq_outstanding[channel])); - wake_up_interruptible(&(privdata->irq_queues[channel])); - - return true; -} - -/** - * - * Handles IRQs. At the moment, this acknowledges the card that this IRQ - * was received and then increases the driver's IRQ counter. - * - * @see pcidriver_irq_acknowledge - * - */ -IRQ_HANDLER_FUNC(pcidriver_irq_handler) -{ - pcidriver_privdata_t *privdata = (pcidriver_privdata_t *)dev_id; - - if (!pcidriver_irq_acknowledge(privdata)) - return IRQ_NONE; - - privdata->irq_count++; - return IRQ_HANDLED; -} diff --git a/driver/int.h b/driver/int.h deleted file mode 100644 index 4a834c7..0000000 --- a/driver/int.h +++ /dev/null @@ -1,9 +0,0 @@ -#if !defined(_PCIDRIVER_INT_H) && defined(ENABLE_IRQ) -#define _PCIDRIVER_INT_H - -int pcidriver_probe_irq(pcidriver_privdata_t *privdata); -void pcidriver_remove_irq(pcidriver_privdata_t *privdata); -void pcidriver_irq_unmap_bars(pcidriver_privdata_t *privdata); -IRQ_HANDLER_FUNC(pcidriver_irq_handler); - -#endif diff --git a/driver/ioctl.c b/driver/ioctl.c deleted file mode 100644 index 2d4af73..0000000 --- a/driver/ioctl.c +++ /dev/null @@ -1,471 +0,0 @@ -/** - * - * @file ioctl.c - * @author Guillermo Marcus - * @date 2009-04-05 - * @brief Contains the functions handling the different ioctl calls. - * - */ -#include <linux/version.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/types.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/cdev.h> -#include <linux/sysfs.h> -#include <asm/atomic.h> -#include <linux/pagemap.h> -#include <linux/spinlock.h> -#include <linux/list.h> -#include <asm/scatterlist.h> -#include <linux/vmalloc.h> -#include <linux/stat.h> -#include <linux/interrupt.h> -#include <linux/wait.h> -#include <linux/sched.h> - -#include "config.h" /* Configuration for the driver */ -#include "compat.h" /* Compatibility functions/definitions */ -#include "pciDriver.h" /* External interface for the driver */ -#include "common.h" /* Internal definitions for all parts */ -#include "kmem.h" /* Internal definitions for kernel memory */ -#include "umem.h" /* Internal definitions for user space memory */ -#include "ioctl.h" /* Internal definitions for the ioctl part */ - -/** Declares a variable of the given type with the given name and copies it from userspace */ -#define READ_FROM_USER(type, name) \ - type name; \ - if ((ret = copy_from_user(&name, (type*)arg, sizeof(name))) != 0) \ - return -EFAULT; - -/** Writes back the given variable with the given type to userspace */ -#define WRITE_TO_USER(type, name) \ - if ((ret = copy_to_user((type*)arg, &name, sizeof(name))) != 0) \ - return -EFAULT; - -/** - * - * Sets the mmap mode for following mmap() calls. - * - * @param arg Not a pointer, but either PCIDRIVER_MMAP_PCI or PCIDRIVER_MMAP_KMEM - * - */ -static int ioctl_mmap_mode(pcidriver_privdata_t *privdata, unsigned long arg) -{ - if ((arg != PCIDRIVER_MMAP_PCI) && (arg != PCIDRIVER_MMAP_KMEM)) - return -EINVAL; - - /* change the mode */ - privdata->mmap_mode = arg; - - return 0; -} - -/** - * - * Sets the mmap area (BAR) for following mmap() calls. - * - */ -static int ioctl_mmap_area(pcidriver_privdata_t *privdata, unsigned long arg) -{ - /* validate input */ - if ((arg < PCIDRIVER_BAR0) || (arg > PCIDRIVER_BAR5)) - return -EINVAL; - - /* change the PCI area to mmap */ - privdata->mmap_area = arg; - - return 0; -} - -/** - * - * Reads/writes a byte/word/dword of the device's PCI config. - * - * @see pcidriver_pci_read - * @see pcidriver_pci_write - * - */ -static int ioctl_pci_config_read_write(pcidriver_privdata_t *privdata, unsigned int cmd, unsigned long arg) -{ - int ret; - READ_FROM_USER(pci_cfg_cmd, pci_cmd); - - if (cmd == PCIDRIVER_IOC_PCI_CFG_RD) { - switch (pci_cmd.size) { - case PCIDRIVER_PCI_CFG_SZ_BYTE: - ret = pci_read_config_byte( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.byte) ); - break; - case PCIDRIVER_PCI_CFG_SZ_WORD: - ret = pci_read_config_word( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.word) ); - break; - case PCIDRIVER_PCI_CFG_SZ_DWORD: - ret = pci_read_config_dword( privdata->pdev, pci_cmd.addr, &(pci_cmd.val.dword) ); - break; - default: - return -EINVAL; /* Wrong size setting */ - } - } else { - switch (pci_cmd.size) { - case PCIDRIVER_PCI_CFG_SZ_BYTE: - ret = pci_write_config_byte( privdata->pdev, pci_cmd.addr, pci_cmd.val.byte ); - break; - case PCIDRIVER_PCI_CFG_SZ_WORD: - ret = pci_write_config_word( privdata->pdev, pci_cmd.addr, pci_cmd.val.word ); - break; - case PCIDRIVER_PCI_CFG_SZ_DWORD: - ret = pci_write_config_dword( privdata->pdev, pci_cmd.addr, pci_cmd.val.dword ); - break; - default: - return -EINVAL; /* Wrong size setting */ - break; - } - } - - WRITE_TO_USER(pci_cfg_cmd, pci_cmd); - - return 0; -} - -/** - * - * Gets the PCI information for the device. - * - * @see pcidriver_pci_info - * - */ -static int ioctl_pci_info(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - int bar; - READ_FROM_USER(pcilib_board_info_t, pci_info); - - pci_info.vendor_id = privdata->pdev->vendor; - pci_info.device_id = privdata->pdev->device; - pci_info.bus = privdata->pdev->bus->number; - pci_info.slot = PCI_SLOT(privdata->pdev->devfn); - pci_info.devfn = privdata->pdev->devfn; - pci_info.func = PCI_FUNC(privdata->pdev->devfn); - - if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_PIN, &(pci_info.interrupt_pin))) != 0) - return ret; - - if ((ret = pci_read_config_byte(privdata->pdev, PCI_INTERRUPT_LINE, &(pci_info.interrupt_line))) != 0) - return ret; - - for (bar = 0; bar < 6; bar++) { - pci_info.bar_start[bar] = pci_resource_start(privdata->pdev, bar); - pci_info.bar_length[bar] = pci_resource_len(privdata->pdev, bar); - pci_info.bar_flags[bar] = pci_resource_flags(privdata->pdev, bar); - } - - WRITE_TO_USER(pcilib_board_info_t, pci_info); - - return 0; -} - -/** - * - * Allocates kernel memory. - * - * @see pcidriver_kmem_alloc - * - */ -static int ioctl_kmem_alloc(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(kmem_handle_t, khandle); - - if ((ret = pcidriver_kmem_alloc(privdata, &khandle)) != 0) - return ret; - - WRITE_TO_USER(kmem_handle_t, khandle); - - return 0; -} - -/** - * - * Frees kernel memory. - * - * @see pcidriver_kmem_free - * - */ -static int ioctl_kmem_free(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(kmem_handle_t, khandle); - - if ((ret = pcidriver_kmem_free(privdata, &khandle)) != 0) - return ret; - - return 0; -} - -/** - * - * Syncs kernel memory. - * - * @see pcidriver_kmem_sync - * - */ -static int ioctl_kmem_sync(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(kmem_sync_t, ksync); - - if ((ret = pcidriver_kmem_sync(privdata, &ksync)) != 0) - return ret; - - WRITE_TO_USER(kmem_sync_t, ksync); - - return 0; -} - -/* - * - * Maps the given scatter/gather list from memory to PCI bus addresses. - * - * @see pcidriver_umem_sgmap - * - */ -static int ioctl_umem_sgmap(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(umem_handle_t, uhandle); - - if ((ret = pcidriver_umem_sgmap(privdata, &uhandle)) != 0) - return ret; - - WRITE_TO_USER(umem_handle_t, uhandle); - - return 0; -} - -/** - * - * Unmaps the given scatter/gather list. - * - * @see pcidriver_umem_sgunmap - * - */ -static int ioctl_umem_sgunmap(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - pcidriver_umem_entry_t *umem_entry; - READ_FROM_USER(umem_handle_t, uhandle); - - /* Find the associated umem_entry for this buffer, - * return -EINVAL if the specified handle id is invalid */ - if ((umem_entry = pcidriver_umem_find_entry_id(privdata, uhandle.handle_id)) == NULL) - return -EINVAL; - - if ((ret = pcidriver_umem_sgunmap(privdata, umem_entry)) != 0) - return ret; - - return 0; -} - -/** - * - * Copies the scatter/gather list from kernelspace to userspace. - * - * @see pcidriver_umem_sgget - * - */ -static int ioctl_umem_sgget(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(umem_sglist_t, usglist); - - /* The umem_sglist_t has a pointer to the scatter/gather list itself which - * needs to be copied separately. The number of elements is stored in ->nents. - * As the list can get very big, we need to use vmalloc. */ - if ((usglist.sg = vmalloc(usglist.nents * sizeof(umem_sgentry_t))) == NULL) - return -ENOMEM; - - /* copy array to kernel structure */ - ret = copy_from_user(usglist.sg, ((umem_sglist_t *)arg)->sg, (usglist.nents)*sizeof(umem_sgentry_t)); - if (ret) return -EFAULT; - - if ((ret = pcidriver_umem_sgget(privdata, &usglist)) != 0) - return ret; - - /* write data to user space */ - ret = copy_to_user(((umem_sglist_t *)arg)->sg, usglist.sg, (usglist.nents)*sizeof(umem_sgentry_t)); - if (ret) return -EFAULT; - - /* free array memory */ - vfree(usglist.sg); - - /* restore sg pointer to vma address in user space before copying */ - usglist.sg = ((umem_sglist_t *)arg)->sg; - - WRITE_TO_USER(umem_sglist_t, usglist); - - return 0; -} - -/** - * - * Syncs user memory. - * - * @see pcidriver_umem_sync - * - */ -static int ioctl_umem_sync(pcidriver_privdata_t *privdata, unsigned long arg) -{ - int ret; - READ_FROM_USER(umem_handle_t, uhandle); - - return pcidriver_umem_sync( privdata, &uhandle ); -} - -/** - * - * Waits for an interrupt - * - * @param arg Not a pointer, but the irq source to wait for (unsigned int) - * - */ -static int ioctl_wait_interrupt(pcidriver_privdata_t *privdata, unsigned long arg) -{ -#ifdef ENABLE_IRQ - int ret; - unsigned long timeout; - unsigned int irq_source; - unsigned long temp = 0; - - READ_FROM_USER(interrupt_wait_t, irq_handle); - - irq_source = irq_handle.source; - - if (irq_source >= PCIDRIVER_INT_MAXSOURCES) - return -EFAULT; /* User tried to overrun the IRQ_SOURCES array */ - - timeout = jiffies + (irq_handle.timeout * HZ / 1000000); - - /* Thanks to Joern for the correction and tips! */ - /* done this way to avoid wrong behaviour (endless loop) of the compiler in AMD platforms */ - do { - /* We wait here with an interruptible timeout. This will be interrupted - * by int.c:check_acknowledge_channel() as soon as in interrupt for - * the specified source arrives. */ - wait_event_interruptible_timeout( (privdata->irq_queues[irq_source]), (atomic_read(&(privdata->irq_outstanding[irq_source])) > 0), (10*HZ/1000) ); - - if (atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source])) ) - atomic_inc( &(privdata->irq_outstanding[irq_source]) ); - else - temp = 1; - } while ((!temp)&&(jiffies < timeout)); - - if ((temp)&&(irq_handle.count)) { - while (!atomic_add_negative( -1, &(privdata->irq_outstanding[irq_source]))) temp++; - atomic_inc( &(privdata->irq_outstanding[irq_source]) ); - } - - irq_handle.count = temp; - - WRITE_TO_USER(interrupt_wait_t, irq_handle); - - return 0; -#else - mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n"); - return -EFAULT; -#endif -} - -/** - * - * Clears the interrupt wait queue. - * - * @param arg Not a pointer, but the irq source (unsigned int) - * @returns -EFAULT if the user specified an irq source out of range - * - */ -static int ioctl_clear_ioq(pcidriver_privdata_t *privdata, unsigned long arg) -{ -#ifdef ENABLE_IRQ - unsigned int irq_source; - - if (arg >= PCIDRIVER_INT_MAXSOURCES) - return -EFAULT; - - irq_source = arg; - atomic_set(&(privdata->irq_outstanding[irq_source]), 0); - - return 0; -#else - mod_info("Asked to wait for interrupt but interrupts are not enabled in the driver\n"); - return -EFAULT; -#endif -} - -/** - * - * This function handles all ioctl file operations. - * Generally, the data of the ioctl is copied from userspace to kernelspace, a separate - * function is called to handle the ioctl itself, then the data is copied back to userspace. - * - * @returns -EFAULT when an invalid memory pointer is passed - * - */ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11) -int pcidriver_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg) -#else -long pcidriver_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -#endif -{ - pcidriver_privdata_t *privdata = filp->private_data; - - /* Select the appropiate command */ - switch (cmd) { - case PCIDRIVER_IOC_MMAP_MODE: - return ioctl_mmap_mode(privdata, arg); - - case PCIDRIVER_IOC_MMAP_AREA: - return ioctl_mmap_area(privdata, arg); - - case PCIDRIVER_IOC_PCI_CFG_RD: - case PCIDRIVER_IOC_PCI_CFG_WR: - return ioctl_pci_config_read_write(privdata, cmd, arg); - - case PCIDRIVER_IOC_PCI_INFO: - return ioctl_pci_info(privdata, arg); - - case PCIDRIVER_IOC_KMEM_ALLOC: - return ioctl_kmem_alloc(privdata, arg); - - case PCIDRIVER_IOC_KMEM_FREE: - return ioctl_kmem_free(privdata, arg); - - case PCIDRIVER_IOC_KMEM_SYNC: - return ioctl_kmem_sync(privdata, arg); - - case PCIDRIVER_IOC_UMEM_SGMAP: - return ioctl_umem_sgmap(privdata, arg); - - case PCIDRIVER_IOC_UMEM_SGUNMAP: - return ioctl_umem_sgunmap(privdata, arg); - - case PCIDRIVER_IOC_UMEM_SGGET: - return ioctl_umem_sgget(privdata, arg); - - case PCIDRIVER_IOC_UMEM_SYNC: - return ioctl_umem_sync(privdata, arg); - - case PCIDRIVER_IOC_WAITI: - return ioctl_wait_interrupt(privdata, arg); - - case PCIDRIVER_IOC_CLEAR_IOQ: - return ioctl_clear_ioq(privdata, arg); - - default: - return -EINVAL; - } -} diff --git a/driver/ioctl.h b/driver/ioctl.h deleted file mode 100644 index 696fb8b..0000000 --- a/driver/ioctl.h +++ /dev/null @@ -1,5 +0,0 @@ -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11) -int pcidriver_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg); -#else -long pcidriver_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); -#endif diff --git a/driver/kmem.c b/driver/kmem.c deleted file mode 100644 index b323272..0000000 --- a/driver/kmem.c +++ /dev/null @@ -1,657 +0,0 @@ -/** - * - * @file kmem.c - * @brief This file contains all functions dealing with kernel memory. - * @author Guillermo Marcus - * @date 2009-04-05 - * - */ -#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 "config.h" /* compile-time configuration */ -#include "compat.h" /* compatibility definitions for older linux */ -#include "pciDriver.h" /* external interface for the driver */ -#include "common.h" /* internal definitions for all parts */ -#include "kmem.h" /* prototypes for kernel memory */ -#include "sysfs.h" /* prototypes for sysfs */ - -/* VM_RESERVED is removed in 3.7-rc1 */ -#ifndef VM_RESERVED -# define VM_RESERVED (VM_DONTEXPAND | VM_DONTDUMP) -#endif - -/** - * - * Allocates new kernel memory including the corresponding management structure, makes - * it available via sysfs if possible. - * - */ -int pcidriver_kmem_alloc(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle) -{ - int flags; - pcidriver_kmem_entry_t *kmem_entry; - void *retptr; - - if (kmem_handle->flags&KMEM_FLAG_REUSE) { - kmem_entry = pcidriver_kmem_find_entry_use(privdata, kmem_handle->use, kmem_handle->item); - if (kmem_entry) { - unsigned long flags = kmem_handle->flags; - - if (flags&KMEM_FLAG_TRY) { - kmem_handle->type = kmem_entry->type; - kmem_handle->size = kmem_entry->size; - kmem_handle->align = kmem_entry->align; - } else { - if (kmem_handle->type != kmem_entry->type) { - mod_info("Invalid type of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->type, kmem_handle->type); - return -EINVAL; - } - - if ((kmem_handle->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_PAGE) { - kmem_handle->size = kmem_entry->size; - } else if (kmem_handle->size != kmem_entry->size) { - mod_info("Invalid size of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->size, kmem_handle->size); - return -EINVAL; - } - - if (kmem_handle->align != kmem_entry->align) { - mod_info("Invalid alignment of reusable kmem_entry, currently: %lu, but requested: %lu\n", kmem_entry->align, kmem_handle->align); - return -EINVAL; - } - - if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)?1:0) != ((flags&KMEM_FLAG_EXCLUSIVE)?1:0)) { - mod_info("Invalid mode of reusable kmem_entry\n"); - return -EINVAL; - } - } - - - if ((kmem_entry->mode&KMEM_MODE_COUNT)==KMEM_MODE_COUNT) { - mod_info("Reuse counter of kmem_entry is overflown"); - return -EBUSY; - } - - - kmem_handle->handle_id = kmem_entry->id; - kmem_handle->pa = (unsigned long)(kmem_entry->dma_handle); - - kmem_handle->flags = KMEM_FLAG_REUSED; - if (kmem_entry->refs&KMEM_REF_HW) kmem_handle->flags |= KMEM_FLAG_REUSED_HW; - if (kmem_entry->mode&KMEM_MODE_PERSISTENT) kmem_handle->flags |= KMEM_FLAG_REUSED_PERSISTENT; - - kmem_entry->mode += 1; - if (flags&KMEM_FLAG_HW) { - if ((kmem_entry->refs&KMEM_REF_HW)==0) - pcidriver_module_get(privdata); - - kmem_entry->refs |= KMEM_REF_HW; - } - if (flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT; - - privdata->kmem_cur_id = kmem_entry->id; - - return 0; - } - - if (kmem_handle->flags&KMEM_FLAG_TRY) return -ENOENT; - } - - /* First, allocate zeroed memory for the kmem_entry */ - if ((kmem_entry = kcalloc(1, sizeof(pcidriver_kmem_entry_t), GFP_KERNEL)) == NULL) - goto kmem_alloc_entry_fail; - - /* Initialize the kmem_entry */ - kmem_entry->id = atomic_inc_return(&privdata->kmem_count) - 1; - privdata->kmem_cur_id = kmem_entry->id; - kmem_handle->handle_id = kmem_entry->id; - - kmem_entry->use = kmem_handle->use; - kmem_entry->item = kmem_handle->item; - kmem_entry->type = kmem_handle->type; - kmem_entry->align = kmem_handle->align; - kmem_entry->direction = PCI_DMA_NONE; - - /* Initialize sysfs if possible */ - if (pcidriver_sysfs_initialize_kmem(privdata, kmem_entry->id, &(kmem_entry->sysfs_attr)) != 0) - goto kmem_alloc_mem_fail; - - /* ...and allocate the DMA memory */ - /* note this is a memory pair, referencing the same area: the cpu address (cpua) - * and the PCI bus address (pa). The CPU and PCI addresses may not be the same. - * The CPU sees only CPU addresses, while the device sees only PCI addresses. - * CPU address is used for the mmap (internal to the driver), and - * PCI address is the address passed to the DMA Controller in the device. - */ - switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) { - case PCILIB_KMEM_TYPE_CONSISTENT: - retptr = pci_alloc_consistent( privdata->pdev, kmem_handle->size, &(kmem_entry->dma_handle) ); - break; - case PCILIB_KMEM_TYPE_REGION: - retptr = ioremap(kmem_handle->pa, kmem_handle->size); - kmem_entry->dma_handle = kmem_handle->pa; - if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_S2C) { - kmem_entry->direction = PCI_DMA_TODEVICE; - } else if (kmem_entry->type == PCILIB_KMEM_TYPE_REGION_C2S) { - kmem_entry->direction = PCI_DMA_FROMDEVICE; - } - break; - case PCILIB_KMEM_TYPE_PAGE: - flags = GFP_KERNEL; - - if (kmem_handle->size == 0) - kmem_handle->size = PAGE_SIZE; - else if (kmem_handle->size%PAGE_SIZE) - goto kmem_alloc_mem_fail; - - retptr = (void*)__get_free_pages(flags, get_order(kmem_handle->size)); - kmem_entry->dma_handle = 0; - - if (retptr) { - if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) { - kmem_entry->direction = PCI_DMA_TODEVICE; - kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_TODEVICE); - if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) { - free_pages((unsigned long)retptr, get_order(kmem_handle->size)); - goto kmem_alloc_mem_fail; - } - } else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) { - kmem_entry->direction = PCI_DMA_FROMDEVICE; - kmem_entry->dma_handle = pci_map_single(privdata->pdev, retptr, kmem_handle->size, PCI_DMA_FROMDEVICE); - if (pci_dma_mapping_error(privdata->pdev, kmem_entry->dma_handle)) { - free_pages((unsigned long)retptr, get_order(kmem_handle->size)); - goto kmem_alloc_mem_fail; - - } - } - } - - break; - default: - goto kmem_alloc_mem_fail; - } - - - if (retptr == NULL) - goto kmem_alloc_mem_fail; - - kmem_entry->size = kmem_handle->size; - kmem_entry->cpua = (unsigned long)retptr; - kmem_handle->pa = (unsigned long)(kmem_entry->dma_handle); - - kmem_entry->mode = 1; - if (kmem_handle->flags&KMEM_FLAG_REUSE) { - kmem_entry->mode |= KMEM_MODE_REUSABLE; - if (kmem_handle->flags&KMEM_FLAG_EXCLUSIVE) kmem_entry->mode |= KMEM_MODE_EXCLUSIVE; - if (kmem_handle->flags&KMEM_FLAG_PERSISTENT) kmem_entry->mode |= KMEM_MODE_PERSISTENT; - } - - kmem_entry->refs = 0; - if (kmem_handle->flags&KMEM_FLAG_HW) { - pcidriver_module_get(privdata); - - kmem_entry->refs |= KMEM_REF_HW; - } - - kmem_handle->flags = 0; - - set_pages_reserved_compat(kmem_entry->cpua, kmem_entry->size); - - /* Add the kmem_entry to the list of the device */ - spin_lock( &(privdata->kmemlist_lock) ); - list_add_tail( &(kmem_entry->list), &(privdata->kmem_list) ); - spin_unlock( &(privdata->kmemlist_lock) ); - - return 0; - -kmem_alloc_mem_fail: - kfree(kmem_entry); -kmem_alloc_entry_fail: - return -ENOMEM; -} - -static int pcidriver_kmem_free_check(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle, pcidriver_kmem_entry_t *kmem_entry) { - if ((kmem_handle->flags & KMEM_FLAG_FORCE) == 0) { - if (kmem_entry->mode&KMEM_MODE_COUNT) - kmem_entry->mode -= 1; - - if (kmem_handle->flags&KMEM_FLAG_HW) { - if (kmem_entry->refs&KMEM_REF_HW) - pcidriver_module_put(privdata); - - kmem_entry->refs &= ~KMEM_REF_HW; - } - - if (kmem_handle->flags&KMEM_FLAG_PERSISTENT) - kmem_entry->mode &= ~KMEM_MODE_PERSISTENT; - - if (kmem_handle->flags&KMEM_FLAG_REUSE) - return 0; - - if (kmem_entry->refs) { - kmem_entry->mode += 1; - mod_info("can't free referenced kmem_entry\n"); - return -EBUSY; - } - - if (kmem_entry->mode & KMEM_MODE_PERSISTENT) { - kmem_entry->mode += 1; - mod_info("can't free persistent kmem_entry\n"); - return -EBUSY; - } - - if (((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)==0)&&(kmem_entry->mode&KMEM_MODE_COUNT)&&((kmem_handle->flags&KMEM_FLAG_EXCLUSIVE)==0)) - return 0; - } else { - if (kmem_entry->refs&KMEM_REF_HW) - pcidriver_module_put(privdata); - - while (!atomic_add_negative(-1, &(privdata->refs))) pcidriver_module_put(privdata); - atomic_inc(&(privdata->refs)); - - } - - return 1; -} - -static int pcidriver_kmem_free_use(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle) -{ - int err; - int failed = 0; - struct list_head *ptr, *next; - pcidriver_kmem_entry_t *kmem_entry; - - /* iterate safely over the entries and delete them */ - list_for_each_safe(ptr, next, &(privdata->kmem_list)) { - kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list); - if (kmem_entry->use == kmem_handle->use) { - err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry); - if (err > 0) - pcidriver_kmem_free_entry(privdata, kmem_entry); /* spin lock inside! */ - else - failed = 1; - } - } - - if (failed) { - mod_info("Some kmem_entries for use %lx are still referenced\n", kmem_handle->use); - return -EBUSY; - } - - return 0; -} - -/** - * - * Called via sysfs, frees kernel memory and the corresponding management structure - * - */ -int pcidriver_kmem_free( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle ) -{ - int err; - pcidriver_kmem_entry_t *kmem_entry; - - if (kmem_handle->flags&KMEM_FLAG_MASS) { - kmem_handle->flags &= ~KMEM_FLAG_MASS; - return pcidriver_kmem_free_use(privdata, kmem_handle); - } - - /* Find the associated kmem_entry for this buffer */ - if ((kmem_entry = pcidriver_kmem_find_entry(privdata, kmem_handle)) == NULL) - return -EINVAL; /* kmem_handle is not valid */ - - err = pcidriver_kmem_free_check(privdata, kmem_handle, kmem_entry); - - if (err > 0) - return pcidriver_kmem_free_entry(privdata, kmem_entry); - - return err; -} - -/** - * - * Called when cleaning up, frees all kernel memory and their corresponding management structure - * - */ -int pcidriver_kmem_free_all(pcidriver_privdata_t *privdata) -{ -// int failed = 0; - struct list_head *ptr, *next; - pcidriver_kmem_entry_t *kmem_entry; - - /* iterate safely over the entries and delete them */ - list_for_each_safe(ptr, next, &(privdata->kmem_list)) { - kmem_entry = list_entry(ptr, pcidriver_kmem_entry_t, list); - /*if (kmem_entry->refs) - failed = 1; - else*/ - pcidriver_kmem_free_entry(privdata, kmem_entry); /* spin lock inside! */ - } -/* - if (failed) { - mod_info("Some kmem_entries are still referenced\n"); - return -EBUSY; - } -*/ - return 0; -} - - -/** - * - * Synchronize memory to/from the device (or in both directions). - * - */ -int pcidriver_kmem_sync_entry( pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry, int direction) -{ - if (kmem_entry->direction == PCI_DMA_NONE) - return -EINVAL; - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11) - switch (direction) { - case PCILIB_KMEM_SYNC_TODEVICE: - pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - case PCILIB_KMEM_SYNC_FROMDEVICE: - pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - case PCILIB_KMEM_SYNC_BIDIRECTIONAL: - pci_dma_sync_single_for_device( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - pci_dma_sync_single_for_cpu( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - default: - return -EINVAL; /* wrong direction parameter */ - } -#else - switch (direction) { - case PCILIB_KMEM_SYNC_TODEVICE: - pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - case PCILIB_KMEM_SYNC_FROMDEVICE: - pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - case PCILIB_KMEM_SYNC_BIDIRECTIONAL: - pci_dma_sync_single( privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, kmem_entry->direction ); - break; - default: - return -EINVAL; /* wrong direction parameter */ - } -#endif - - return 0; /* success */ -} - -/** - * - * Synchronize memory to/from the device (or in both directions). - * - */ -int pcidriver_kmem_sync( pcidriver_privdata_t *privdata, kmem_sync_t *kmem_sync ) -{ - pcidriver_kmem_entry_t *kmem_entry; - - /* Find the associated kmem_entry for this buffer */ - if ((kmem_entry = pcidriver_kmem_find_entry(privdata, &(kmem_sync->handle))) == NULL) - return -EINVAL; /* kmem_handle is not valid */ - - return pcidriver_kmem_sync_entry(privdata, kmem_entry, kmem_sync->dir); -} - -/** - * - * Free the given kmem_entry and its memory. - * - */ -int pcidriver_kmem_free_entry(pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry) -{ - pcidriver_sysfs_remove(privdata, &(kmem_entry->sysfs_attr)); - - /* Go over the pages of the kmem buffer, and mark them as not reserved */ -#if 0 -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,15) - /* - * This code is DISABLED. - * Apparently, it is not needed to unreserve them. Doing so here - * hangs the machine. Why? - * - * Uhm.. see links: - * - * http://lwn.net/Articles/161204/ - * http://lists.openfabrics.org/pipermail/general/2007-March/034101.html - * - * I insist, this should be enabled, but doing so hangs the machine. - * Literature supports the point, and there is even a similar problem (see link) - * But this is not the case. It seems right to me. but obviously is not. - * - * Anyway, this goes away in kernel >=2.6.15. - */ - unsigned long start = __pa(kmem_entry->cpua) >> PAGE_SHIFT; - unsigned long end = __pa(kmem_entry->cpua + kmem_entry->size) >> PAGE_SHIFT; - unsigned long i; - for(i=start;i<end;i++) { - struct page *kpage = pfn_to_page(i); - ClearPageReserved(kpage); - } -#endif -#endif - - /* Release DMA memory */ - switch (kmem_entry->type&PCILIB_KMEM_TYPE_MASK) { - case PCILIB_KMEM_TYPE_CONSISTENT: - pci_free_consistent( privdata->pdev, kmem_entry->size, (void *)(kmem_entry->cpua), kmem_entry->dma_handle ); - break; - case PCILIB_KMEM_TYPE_REGION: - iounmap((void *)(kmem_entry->cpua)); - break; - case PCILIB_KMEM_TYPE_PAGE: - if (kmem_entry->dma_handle) { - if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_S2C_PAGE) { - pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_TODEVICE); - } else if (kmem_entry->type == PCILIB_KMEM_TYPE_DMA_C2S_PAGE) { - pci_unmap_single(privdata->pdev, kmem_entry->dma_handle, kmem_entry->size, PCI_DMA_FROMDEVICE); - } - } - free_pages((unsigned long)kmem_entry->cpua, get_order(kmem_entry->size)); - break; - } - - - /* Remove the kmem list entry */ - spin_lock( &(privdata->kmemlist_lock) ); - list_del( &(kmem_entry->list) ); - spin_unlock( &(privdata->kmemlist_lock) ); - - /* Release kmem_entry memory */ - kfree(kmem_entry); - - return 0; -} - -/** - * - * Find the corresponding kmem_entry for the given kmem_handle. - * - */ -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry(pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle) -{ - struct list_head *ptr; - pcidriver_kmem_entry_t *entry, *result = NULL; - - /* should I implement it better using the handle_id? */ - - spin_lock(&(privdata->kmemlist_lock)); - list_for_each(ptr, &(privdata->kmem_list)) { - entry = list_entry(ptr, pcidriver_kmem_entry_t, list); - - if (entry->id == kmem_handle->handle_id) { - result = entry; - break; - } - } - - spin_unlock(&(privdata->kmemlist_lock)); - return result; -} - -/** - * - * find the corresponding kmem_entry for the given id. - * - */ -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_id(pcidriver_privdata_t *privdata, int id) -{ - struct list_head *ptr; - pcidriver_kmem_entry_t *entry, *result = NULL; - - spin_lock(&(privdata->kmemlist_lock)); - list_for_each(ptr, &(privdata->kmem_list)) { - entry = list_entry(ptr, pcidriver_kmem_entry_t, list); - - if (entry->id == id) { - result = entry; - break; - } - } - - spin_unlock(&(privdata->kmemlist_lock)); - return result; -} - -/** - * - * find the corresponding kmem_entry for the given use and item. - * - */ -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_use(pcidriver_privdata_t *privdata, unsigned long use, unsigned long item) -{ - struct list_head *ptr; - pcidriver_kmem_entry_t *entry, *result = NULL; - - spin_lock(&(privdata->kmemlist_lock)); - list_for_each(ptr, &(privdata->kmem_list)) { - entry = list_entry(ptr, pcidriver_kmem_entry_t, list); - - if ((entry->use == use)&&(entry->item == item)&&(entry->mode&KMEM_MODE_REUSABLE)) { - result = entry; - break; - } - } - - spin_unlock(&(privdata->kmemlist_lock)); - return result; -} - - -void pcidriver_kmem_mmap_close(struct vm_area_struct *vma) { - unsigned long vma_size; - pcidriver_kmem_entry_t *kmem_entry = (pcidriver_kmem_entry_t*)vma->vm_private_data; - if (kmem_entry) { -/* - if (kmem_entry->id == 0) { - mod_info("refs: %p %p %lx\n", vma, vma->vm_private_data, kmem_entry->refs); - mod_info("kmem_size: %lu vma_size: %lu, s: %lx, e: %lx\n", kmem_entry->size, (vma->vm_end - vma->vm_start), vma->vm_start, vma->vm_end); - } -*/ - - vma_size = (vma->vm_end - vma->vm_start); - - if (kmem_entry->refs&KMEM_REF_COUNT) { - kmem_entry->refs -= vma_size / PAGE_SIZE; - } - } -} - -static struct vm_operations_struct pcidriver_kmem_mmap_ops = { - .close = pcidriver_kmem_mmap_close -}; - -/** - * - * mmap() kernel memory to userspace. - * - */ -int pcidriver_mmap_kmem(pcidriver_privdata_t *privdata, struct vm_area_struct *vma) -{ - unsigned long vma_size; - pcidriver_kmem_entry_t *kmem_entry; - int ret; - - mod_info_dbg("Entering mmap_kmem\n"); - - /* FIXME: Is this really right? Always just the latest one? Can't we identify one? */ - /* Get latest entry on the kmem_list */ - kmem_entry = pcidriver_kmem_find_entry_id(privdata, privdata->kmem_cur_id); - if (!kmem_entry) { - mod_info("Trying to mmap a kernel memory buffer without creating it first!\n"); - return -EFAULT; - } - - mod_info_dbg("Got kmem_entry with id: %d\n", kmem_entry->id); - - /* Check sizes */ - vma_size = (vma->vm_end - vma->vm_start); - - if ((vma_size > kmem_entry->size) && - ((kmem_entry->size < PAGE_SIZE) && (vma_size != PAGE_SIZE))) { - mod_info("kem_entry size(%lu) and vma size do not match(%lu)\n", kmem_entry->size, vma_size); - return -EINVAL; - } - - /* reference counting */ - if ((kmem_entry->mode&KMEM_MODE_EXCLUSIVE)&&(kmem_entry->refs&KMEM_REF_COUNT)) { - mod_info("can't make second mmaping for exclusive kmem_entry\n"); - return -EBUSY; - } - if (((kmem_entry->refs&KMEM_REF_COUNT) + (vma_size / PAGE_SIZE)) > KMEM_REF_COUNT) { - mod_info("maximal amount of references is reached by kmem_entry\n"); - return -EBUSY; - } - - kmem_entry->refs += vma_size / PAGE_SIZE; - - vma->vm_flags |= (VM_RESERVED); - -#ifdef pgprot_noncached - // This is coherent memory, so it must not be cached. - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -#endif - - mod_info_dbg("Mapping address %08lx / PFN %08lx\n", - virt_to_phys((void*)kmem_entry->cpua), - page_to_pfn(virt_to_page((void*)kmem_entry->cpua))); - - if ((kmem_entry->type&PCILIB_KMEM_TYPE_MASK) == PCILIB_KMEM_TYPE_REGION) { - ret = remap_pfn_range_compat( - vma, - vma->vm_start, - kmem_entry->dma_handle, - (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, - vma->vm_page_prot); - } else { - ret = remap_pfn_range_cpua_compat( - vma, - vma->vm_start, - kmem_entry->cpua, - (vma_size < kmem_entry->size)?vma_size:kmem_entry->size, - vma->vm_page_prot ); - } - - if (ret) { - mod_info("kmem remap failed: %d (%lx)\n", ret,kmem_entry->cpua); - kmem_entry->refs -= 1; - return -EAGAIN; - } - - vma->vm_ops = &pcidriver_kmem_mmap_ops; - vma->vm_private_data = (void*)kmem_entry; - - return ret; -} diff --git a/driver/kmem.h b/driver/kmem.h deleted file mode 100644 index 503620e..0000000 --- a/driver/kmem.h +++ /dev/null @@ -1,9 +0,0 @@ -int pcidriver_kmem_alloc( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle ); -int pcidriver_kmem_free( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle ); -int pcidriver_kmem_sync_entry( pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry, int direction ); -int pcidriver_kmem_sync( pcidriver_privdata_t *privdata, kmem_sync_t *kmem_sync ); -int pcidriver_kmem_free_all( pcidriver_privdata_t *privdata ); -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry( pcidriver_privdata_t *privdata, kmem_handle_t *kmem_handle ); -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_id( pcidriver_privdata_t *privdata, int id ); -pcidriver_kmem_entry_t *pcidriver_kmem_find_entry_use(pcidriver_privdata_t *privdata, unsigned long use, unsigned long item); -int pcidriver_kmem_free_entry( pcidriver_privdata_t *privdata, pcidriver_kmem_entry_t *kmem_entry ); diff --git a/driver/pciDriver.h b/driver/pciDriver.h deleted file mode 100644 index 67a80f2..0000000 --- a/driver/pciDriver.h +++ /dev/null @@ -1,217 +0,0 @@ -#ifndef PCIDRIVER_H_ -#define PCIDRIVER_H_ - -/** - * This is a full rewrite of the pciDriver. - * New default is to support kernel 2.6, using kernel 2.6 APIs. - * - * This header defines the interface to the outside world. - * - * $Revision: 1.6 $ - * $Date: 2008-01-24 14:21:36 $ - * - */ - -/* - * Change History: - * - * $Log: not supported by cvs2svn $ - * Revision 1.5 2008-01-11 10:15:14 marcus - * Removed unused interrupt code. - * Added intSource to the wait interrupt call. - * - * Revision 1.4 2006/11/17 18:44:42 marcus - * Type of SG list can now be selected at runtime. Added type to sglist. - * - * Revision 1.3 2006/11/17 16:23:02 marcus - * Added slot number to the PCI info IOctl. - * - * Revision 1.2 2006/11/13 12:29:09 marcus - * Added a IOctl call, to confiure the interrupt response. (testing pending). - * Basic interrupts are now supported. - * - * Revision 1.1 2006/10/10 14:46:52 marcus - * Initial commit of the new pciDriver for kernel 2.6 - * - * Revision 1.7 2006/10/06 15:18:06 marcus - * Updated PCI info and PCI cmd - * - * Revision 1.6 2006/09/25 16:51:07 marcus - * Added PCI config IOctls, and implemented basic mmap functions. - * - * Revision 1.5 2006/09/18 17:13:12 marcus - * backup commit. - * - * Revision 1.4 2006/09/15 15:44:41 marcus - * backup commit. - * - * Revision 1.3 2006/08/15 11:40:02 marcus - * backup commit. - * - * Revision 1.2 2006/08/12 18:28:42 marcus - * Sync with the laptop - * - * Revision 1.1 2006/08/11 15:30:46 marcus - * Sync with the laptop - * - */ - -#include <linux/ioctl.h> -#include "../pcilib_types.h" - -/* Identifies the PCI-E Xilinx ML605 */ -#define PCIE_XILINX_VENDOR_ID 0x10ee -#define PCIE_ML605_DEVICE_ID 0x6024 - -/* Identifies the PCI-E IPE Camera */ -#define PCIE_IPECAMERA_DEVICE_ID 0x6081 -#define PCIE_KAPTURE_DEVICE_ID 0x6028 -//#define PCIE_IPECAMERA_DEVICE_ID 0x6018 - - -/* Possible values for ioctl commands */ - -/* PCI mmap areas */ -#define PCIDRIVER_BAR0 0 -#define PCIDRIVER_BAR1 1 -#define PCIDRIVER_BAR2 2 -#define PCIDRIVER_BAR3 3 -#define PCIDRIVER_BAR4 4 -#define PCIDRIVER_BAR5 5 - -/* mmap mode of the device */ -#define PCIDRIVER_MMAP_PCI 0 -#define PCIDRIVER_MMAP_KMEM 1 - -/* Direction of a DMA operation */ -#define PCIDRIVER_DMA_BIDIRECTIONAL 0 -#define PCIDRIVER_DMA_TODEVICE PCILIB_KMEM_SYNC_TODEVICE -#define PCIDRIVER_DMA_FROMDEVICE PCILIB_KMEM_SYNC_FROMDEVICE - -/* Possible sizes in a PCI command */ -#define PCIDRIVER_PCI_CFG_SZ_BYTE 1 -#define PCIDRIVER_PCI_CFG_SZ_WORD 2 -#define PCIDRIVER_PCI_CFG_SZ_DWORD 3 - -/* Possible types of SG lists */ -#define PCIDRIVER_SG_NONMERGED 0 -#define PCIDRIVER_SG_MERGED 1 - -/* Maximum number of interrupt sources */ -#define PCIDRIVER_INT_MAXSOURCES 16 - - -#define KMEM_FLAG_REUSE 1 /**< Try to reuse existing buffer with the same use & item */ -#define KMEM_FLAG_EXCLUSIVE 2 /**< Allow only a single application accessing a specified use & item */ -#define KMEM_FLAG_PERSISTENT 4 /**< Sets persistent mode */ -#define KMEM_FLAG_HW 8 /**< The buffer may be accessed by hardware, the hardware access will not occur any more if passed to _free function */ -#define KMEM_FLAG_FORCE 16 /**< Force memory cleanup even if references are present */ -#define KMEM_FLAG_MASS 32 /**< Apply to all buffers of selected use */ -#define KMEM_FLAG_TRY 64 /**< Do not allocate buffers, try to reuse and fail if not possible */ - -#define KMEM_FLAG_REUSED 1 /**< Indicates if buffer with specified use & item was already allocated and reused */ -#define KMEM_FLAG_REUSED_PERSISTENT 4 /**< Indicates that reused buffer was persistent before the call */ -#define KMEM_FLAG_REUSED_HW 8 /**< Indicates that reused buffer had a HW reference before the call */ - - -/* Types */ -typedef struct { - unsigned long type; - unsigned long pa; - unsigned long size; - unsigned long align; - unsigned long use; - unsigned long item; - int flags; - int handle_id; -} kmem_handle_t; - -typedef struct { - unsigned long addr; - unsigned long size; -} umem_sgentry_t; - -typedef struct { - int handle_id; - int type; - int nents; - umem_sgentry_t *sg; -} umem_sglist_t; - -typedef struct { - unsigned long vma; - unsigned long size; - int handle_id; - int dir; -} umem_handle_t; - -typedef struct { - kmem_handle_t handle; - int dir; -} kmem_sync_t; - -typedef struct { - unsigned long count; - unsigned long timeout; // microseconds - unsigned int source; -} interrupt_wait_t; - -typedef struct { - int size; - int addr; - union { - unsigned char byte; - unsigned short word; - unsigned int dword; /* not strict C, but if not can have problems */ - } val; -} pci_cfg_cmd; - -typedef struct { - unsigned short vendor_id; - unsigned short device_id; - unsigned short bus; - unsigned short slot; - unsigned short func; - unsigned short devfn; - unsigned char interrupt_pin; - unsigned char interrupt_line; - unsigned int irq; - unsigned long bar_start[6]; - unsigned long bar_length[6]; - unsigned long bar_flags[6]; -} pcilib_board_info_t; - - -/* ioctl interface */ -/* See documentation for a detailed usage explanation */ - -/* - * one of the problems of ioctl, is that requires a type definition. - * This type is only 8-bits wide, and half-documented in - * <linux-src>/Documentation/ioctl-number.txt. - * previous SHL -> 'S' definition, conflicts with several devices, - * so I changed it to be pci -> 'p', in the range 0xA0-AF - */ -#define PCIDRIVER_IOC_MAGIC 'p' -#define PCIDRIVER_IOC_BASE 0xA0 - -#define PCIDRIVER_IOC_MMAP_MODE _IO( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 0 ) -#define PCIDRIVER_IOC_MMAP_AREA _IO( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 1 ) -#define PCIDRIVER_IOC_KMEM_ALLOC _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 2, kmem_handle_t * ) -#define PCIDRIVER_IOC_KMEM_FREE _IOW ( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 3, kmem_handle_t * ) -#define PCIDRIVER_IOC_KMEM_SYNC _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 4, kmem_sync_t * ) -#define PCIDRIVER_IOC_UMEM_SGMAP _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 5, umem_handle_t * ) -#define PCIDRIVER_IOC_UMEM_SGUNMAP _IOW( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 6, umem_handle_t * ) -#define PCIDRIVER_IOC_UMEM_SGGET _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 7, umem_sglist_t * ) -#define PCIDRIVER_IOC_UMEM_SYNC _IOW( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 8, umem_handle_t * ) -#define PCIDRIVER_IOC_WAITI _IO( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 9 ) - -/* And now, the methods to access the PCI configuration area */ -#define PCIDRIVER_IOC_PCI_CFG_RD _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 10, pci_cfg_cmd * ) -#define PCIDRIVER_IOC_PCI_CFG_WR _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 11, pci_cfg_cmd * ) -#define PCIDRIVER_IOC_PCI_INFO _IOWR( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 12, pcilib_board_info_t * ) - -/* Clear interrupt queues */ -#define PCIDRIVER_IOC_CLEAR_IOQ _IO( PCIDRIVER_IOC_MAGIC, PCIDRIVER_IOC_BASE + 13 ) - -#endif diff --git a/driver/sysfs.c b/driver/sysfs.c deleted file mode 100644 index abc1c8a..0000000 --- a/driver/sysfs.c +++ /dev/null @@ -1,308 +0,0 @@ -/** - * - * @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); -} diff --git a/driver/sysfs.h b/driver/sysfs.h deleted file mode 100644 index 4c413f0..0000000 --- a/driver/sysfs.h +++ /dev/null @@ -1,23 +0,0 @@ -#ifndef _PCIDRIVER_SYSFS_H -#define _PCIDRIVER_SYSFS_H -int pcidriver_sysfs_initialize_kmem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr); -int pcidriver_sysfs_initialize_umem(pcidriver_privdata_t *privdata, int id, struct class_device_attribute *sysfs_attr); -void pcidriver_sysfs_remove(pcidriver_privdata_t *privdata, struct class_device_attribute *sysfs_attr); - -#ifdef ENABLE_IRQ -SYSFS_GET_FUNCTION(pcidriver_show_irq_count); -SYSFS_GET_FUNCTION(pcidriver_show_irq_queues); -#endif - -/* prototypes for sysfs operations */ -SYSFS_GET_FUNCTION(pcidriver_show_mmap_mode); -SYSFS_SET_FUNCTION(pcidriver_store_mmap_mode); -SYSFS_GET_FUNCTION(pcidriver_show_mmap_area); -SYSFS_SET_FUNCTION(pcidriver_store_mmap_area); -SYSFS_GET_FUNCTION(pcidriver_show_kmem_count); -SYSFS_GET_FUNCTION(pcidriver_show_kbuffers); -SYSFS_SET_FUNCTION(pcidriver_store_kmem_alloc); -SYSFS_SET_FUNCTION(pcidriver_store_kmem_free); -SYSFS_GET_FUNCTION(pcidriver_show_umappings); -SYSFS_SET_FUNCTION(pcidriver_store_umem_unmap); -#endif diff --git a/driver/umem.c b/driver/umem.c deleted file mode 100644 index 7a8dcc1..0000000 --- a/driver/umem.c +++ /dev/null @@ -1,438 +0,0 @@ -/** - * - * @file umem.c - * @brief This file contains the functions handling user space memory. - * @author Guillermo Marcus - * @date 2009-04-05 - * - */ -#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/sched.h> - -#include "config.h" /* compile-time configuration */ -#include "compat.h" /* compatibility definitions for older linux */ -#include "pciDriver.h" /* external interface for the driver */ -#include "common.h" /* internal definitions for all parts */ -#include "umem.h" /* prototypes for kernel memory */ -#include "sysfs.h" /* prototypes for sysfs */ - -/** - * - * Reserve a new scatter/gather list and map it from memory to PCI bus addresses. - * - */ -int pcidriver_umem_sgmap(pcidriver_privdata_t *privdata, umem_handle_t *umem_handle) -{ - int i, res, nr_pages; - struct page **pages; - struct scatterlist *sg = NULL; - pcidriver_umem_entry_t *umem_entry; - unsigned int nents; - unsigned long count,offset,length; - - /* - * We do some checks first. Then, the following is necessary to create a - * Scatter/Gather list from a user memory area: - * - Determine the number of pages - * - Get the pages for the memory area - * - Lock them. - * - Create a scatter/gather list of the pages - * - Map the list from memory to PCI bus addresses - * - * Then, we: - * - Create an entry on the umem list of the device, to cache the mapping. - * - Create a sysfs attribute that gives easy access to the SG list - */ - - /* zero-size?? */ - if (umem_handle->size == 0) - return -EINVAL; - - /* Direction is better ignoring during mapping. */ - /* We assume bidirectional buffers always, except when sync'ing */ - - /* calculate the number of pages */ - nr_pages = ((umem_handle->vma & ~PAGE_MASK) + umem_handle->size + ~PAGE_MASK) >> PAGE_SHIFT; - - mod_info_dbg("nr_pages computed: %u\n", nr_pages); - - /* Allocate space for the page information */ - /* This can be very big, so we use vmalloc */ - if ((pages = vmalloc(nr_pages * sizeof(*pages))) == NULL) - return -ENOMEM; - - mod_info_dbg("allocated space for the pages.\n"); - - /* Allocate space for the scatterlist */ - /* We do not know how many entries will be, but the maximum is nr_pages. */ - /* This can be very big, so we use vmalloc */ - if ((sg = vmalloc(nr_pages * sizeof(*sg))) == NULL) - goto umem_sgmap_pages; - - sg_init_table(sg, nr_pages); - - mod_info_dbg("allocated space for the SG list.\n"); - - /* Get the page information */ - down_read(¤t->mm->mmap_sem); - res = get_user_pages( - current, - current->mm, - umem_handle->vma, - nr_pages, - 1, - 0, /* do not force, FIXME: shall I? */ - pages, - NULL ); - up_read(¤t->mm->mmap_sem); - - /* Error, not all pages mapped */ - if (res < (int)nr_pages) { - mod_info("Could not map all user pages (%d of %d)\n", res, nr_pages); - /* If only some pages could be mapped, we release those. If a real - * error occured, we set nr_pages to 0 */ - nr_pages = (res > 0 ? res : 0); - goto umem_sgmap_unmap; - } - - mod_info_dbg("Got the pages (%d).\n", res); - - /* Lock the pages, then populate the SG list with the pages */ - /* page0 is different */ - if ( !PageReserved(pages[0]) ) - compat_lock_page(pages[0]); - - offset = (umem_handle->vma & ~PAGE_MASK); - length = (umem_handle->size > (PAGE_SIZE-offset) ? (PAGE_SIZE-offset) : umem_handle->size); - - sg_set_page(&sg[0], pages[0], length, offset); - - count = umem_handle->size - length; - for(i=1;i<nr_pages;i++) { - /* Lock page first */ - if ( !PageReserved(pages[i]) ) - compat_lock_page(pages[i]); - - /* Populate the list */ - sg_set_page(&sg[i], pages[i], ((count > PAGE_SIZE) ? PAGE_SIZE : count), 0); - count -= sg[i].length; - } - - /* Use the page list to populate the SG list */ - /* SG entries may be merged, res is the number of used entries */ - /* We have originally nr_pages entries in the sg list */ - if ((nents = pci_map_sg(privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL)) == 0) - goto umem_sgmap_unmap; - - mod_info_dbg("Mapped SG list (%d entries).\n", nents); - - /* Add an entry to the umem_list of the device, and update the handle with the id */ - /* Allocate space for the new umem entry */ - if ((umem_entry = kmalloc(sizeof(*umem_entry), GFP_KERNEL)) == NULL) - goto umem_sgmap_entry; - - /* Fill entry to be added to the umem list */ - umem_entry->id = atomic_inc_return(&privdata->umem_count) - 1; - umem_entry->nr_pages = nr_pages; /* Will be needed when unmapping */ - umem_entry->pages = pages; - umem_entry->nents = nents; - umem_entry->sg = sg; - - if (pcidriver_sysfs_initialize_umem(privdata, umem_entry->id, &(umem_entry->sysfs_attr)) != 0) - goto umem_sgmap_name_fail; - - /* Add entry to the umem list */ - spin_lock( &(privdata->umemlist_lock) ); - list_add_tail( &(umem_entry->list), &(privdata->umem_list) ); - spin_unlock( &(privdata->umemlist_lock) ); - - /* Update the Handle with the Handle ID of the entry */ - umem_handle->handle_id = umem_entry->id; - - return 0; - -umem_sgmap_name_fail: - kfree(umem_entry); -umem_sgmap_entry: - pci_unmap_sg( privdata->pdev, sg, nr_pages, PCI_DMA_BIDIRECTIONAL ); -umem_sgmap_unmap: - /* release pages */ - if (nr_pages > 0) { - for(i=0;i<nr_pages;i++) { - if (PageLocked(pages[i])) - compat_unlock_page(pages[i]); - if (!PageReserved(pages[i])) - set_page_dirty(pages[i]); - page_cache_release(pages[i]); - } - } - vfree(sg); -umem_sgmap_pages: - vfree(pages); - return -ENOMEM; - -} - -/** - * - * Unmap a scatter/gather list - * - */ -int pcidriver_umem_sgunmap(pcidriver_privdata_t *privdata, pcidriver_umem_entry_t *umem_entry) -{ - int i; - pcidriver_sysfs_remove(privdata, &(umem_entry->sysfs_attr)); - - /* Unmap user memory */ - pci_unmap_sg( privdata->pdev, umem_entry->sg, umem_entry->nr_pages, PCI_DMA_BIDIRECTIONAL ); - - /* Release the pages */ - if (umem_entry->nr_pages > 0) { - for(i=0;i<(umem_entry->nr_pages);i++) { - /* Mark pages as Dirty and unlock it */ - if ( !PageReserved( umem_entry->pages[i] )) { - SetPageDirty( umem_entry->pages[i] ); - compat_unlock_page(umem_entry->pages[i]); - } - /* and release it from the cache */ - page_cache_release( umem_entry->pages[i] ); - } - } - - /* Remove the umem list entry */ - spin_lock( &(privdata->umemlist_lock) ); - list_del( &(umem_entry->list) ); - spin_unlock( &(privdata->umemlist_lock) ); - - /* Release SG list and page list memory */ - /* These two are in the vm area of the kernel */ - vfree(umem_entry->pages); - vfree(umem_entry->sg); - - /* Release umem_entry memory */ - kfree(umem_entry); - - return 0; -} - -/** - * - * Unmap all scatter/gather lists. - * - */ -int pcidriver_umem_sgunmap_all(pcidriver_privdata_t *privdata) -{ - struct list_head *ptr, *next; - pcidriver_umem_entry_t *umem_entry; - - /* iterate safely over the entries and delete them */ - list_for_each_safe( ptr, next, &(privdata->umem_list) ) { - umem_entry = list_entry(ptr, pcidriver_umem_entry_t, list ); - pcidriver_umem_sgunmap( privdata, umem_entry ); /* spin lock inside! */ - } - - return 0; -} - -/** - * - * Copies the scatter/gather list from kernelspace to userspace. - * - */ -int pcidriver_umem_sgget(pcidriver_privdata_t *privdata, umem_sglist_t *umem_sglist) -{ - int i; - pcidriver_umem_entry_t *umem_entry; - struct scatterlist *sg; - int idx = 0; - dma_addr_t cur_addr; - unsigned int cur_size; - - /* Find the associated umem_entry for this buffer */ - umem_entry = pcidriver_umem_find_entry_id( privdata, umem_sglist->handle_id ); - if (umem_entry == NULL) - return -EINVAL; /* umem_handle is not valid */ - - /* Check if passed SG list is enough */ - if (umem_sglist->nents < umem_entry->nents) - return -EINVAL; /* sg has not enough entries */ - - /* Copy the SG list to the user format */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,24) - if (umem_sglist->type == PCIDRIVER_SG_MERGED) { - for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) { - if (i==0) { - umem_sglist->sg[0].addr = sg_dma_address( sg ); - umem_sglist->sg[0].size = sg_dma_len( sg ); - idx = 0; - } - else { - cur_addr = sg_dma_address( sg ); - cur_size = sg_dma_len( sg ); - - /* Check if entry fits after current entry */ - if (cur_addr == (umem_sglist->sg[idx].addr + umem_sglist->sg[idx].size)) { - umem_sglist->sg[idx].size += cur_size; - continue; - } - - /* Skip if the entry is zero-length (yes, it can happen.... at the end of the list) */ - if (cur_size == 0) - continue; - - /* None of the above, add new entry */ - idx++; - umem_sglist->sg[idx].addr = cur_addr; - umem_sglist->sg[idx].size = cur_size; - } - } - /* Set the used size of the SG list */ - umem_sglist->nents = idx+1; - } else { - for_each_sg(umem_entry->sg, sg, umem_entry->nents, i ) { - mod_info("entry: %d\n",i); - umem_sglist->sg[i].addr = sg_dma_address( sg ); - umem_sglist->sg[i].size = sg_dma_len( sg ); - } - - /* Set the used size of the SG list */ - /* Check if the last one is zero-length */ - if ( umem_sglist->sg[ umem_entry->nents - 1].size == 0) - umem_sglist->nents = umem_entry->nents -1; - else - umem_sglist->nents = umem_entry->nents; - } -#else - if (umem_sglist->type == PCIDRIVER_SG_MERGED) { - /* Merge entries that are contiguous into a single entry */ - /* Non-optimal but fast for most cases */ - /* First one always true */ - sg=umem_entry->sg; - umem_sglist->sg[0].addr = sg_dma_address( sg ); - umem_sglist->sg[0].size = sg_dma_len( sg ); - sg++; - idx = 0; - - /* Iterate over the SG entries */ - for(i=1; i< umem_entry->nents; i++, sg++ ) { - cur_addr = sg_dma_address( sg ); - cur_size = sg_dma_len( sg ); - - /* Check if entry fits after current entry */ - if (cur_addr == (umem_sglist->sg[idx].addr + umem_sglist->sg[idx].size)) { - umem_sglist->sg[idx].size += cur_size; - continue; - } - - /* Skip if the entry is zero-length (yes, it can happen.... at the end of the list) */ - if (cur_size == 0) - continue; - - /* None of the above, add new entry */ - idx++; - umem_sglist->sg[idx].addr = cur_addr; - umem_sglist->sg[idx].size = cur_size; - } - /* Set the used size of the SG list */ - umem_sglist->nents = idx+1; - } else { - /* Assume pci_map_sg made a good job (ehem..) and just copy it. - * actually, now I assume it just gives them plainly to me. */ - for(i=0, sg=umem_entry->sg ; i< umem_entry->nents; i++, sg++ ) { - umem_sglist->sg[i].addr = sg_dma_address( sg ); - umem_sglist->sg[i].size = sg_dma_len( sg ); - } - /* Set the used size of the SG list */ - /* Check if the last one is zero-length */ - if ( umem_sglist->sg[ umem_entry->nents - 1].size == 0) - umem_sglist->nents = umem_entry->nents -1; - else - umem_sglist->nents = umem_entry->nents; - } -#endif - - return 0; -} - -/** - * - * Sync user space memory from/to device - * - */ -int pcidriver_umem_sync( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle ) -{ - pcidriver_umem_entry_t *umem_entry; - - /* Find the associated umem_entry for this buffer */ - umem_entry = pcidriver_umem_find_entry_id( privdata, umem_handle->handle_id ); - if (umem_entry == NULL) - return -EINVAL; /* umem_handle is not valid */ - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11) - switch (umem_handle->dir) { - case PCIDRIVER_DMA_TODEVICE: - pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_TODEVICE ); - break; - case PCIDRIVER_DMA_FROMDEVICE: - pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_FROMDEVICE ); - break; - case PCIDRIVER_DMA_BIDIRECTIONAL: - pci_dma_sync_sg_for_device( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL ); - pci_dma_sync_sg_for_cpu( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL ); - break; - default: - return -EINVAL; /* wrong direction parameter */ - } -#else - switch (umem_handle->dir) { - case PCIDRIVER_DMA_TODEVICE: - pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_TODEVICE ); - break; - case PCIDRIVER_DMA_FROMDEVICE: - pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_FROMDEVICE ); - break; - case PCIDRIVER_DMA_BIDIRECTIONAL: - pci_dma_sync_sg( privdata->pdev, umem_entry->sg, umem_entry->nents, PCI_DMA_BIDIRECTIONAL ); - break; - default: - return -EINVAL; /* wrong direction parameter */ - } -#endif - - return 0; -} - -/* - * - * Get the pcidriver_umem_entry_t structure for the given id. - * - * @param id ID of the umem entry to search for - * - */ -pcidriver_umem_entry_t *pcidriver_umem_find_entry_id(pcidriver_privdata_t *privdata, int id) -{ - struct list_head *ptr; - pcidriver_umem_entry_t *entry; - - spin_lock(&(privdata->umemlist_lock)); - list_for_each(ptr, &(privdata->umem_list)) { - entry = list_entry(ptr, pcidriver_umem_entry_t, list ); - - if (entry->id == id) { - spin_unlock( &(privdata->umemlist_lock) ); - return entry; - } - } - - spin_unlock(&(privdata->umemlist_lock)); - return NULL; -} diff --git a/driver/umem.h b/driver/umem.h deleted file mode 100644 index d16c466..0000000 --- a/driver/umem.h +++ /dev/null @@ -1,5 +0,0 @@ -int pcidriver_umem_sgmap( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle ); -int pcidriver_umem_sgunmap( pcidriver_privdata_t *privdata, pcidriver_umem_entry_t *umem_entry ); -int pcidriver_umem_sgget( pcidriver_privdata_t *privdata, umem_sglist_t *umem_sglist ); -int pcidriver_umem_sync( pcidriver_privdata_t *privdata, umem_handle_t *umem_handle ); -pcidriver_umem_entry_t *pcidriver_umem_find_entry_id( pcidriver_privdata_t *privdata, int id ); |