summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/sysdev
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/sysdev')
-rw-r--r--arch/powerpc/sysdev/Makefile1
-rw-r--r--arch/powerpc/sysdev/axonram.c383
2 files changed, 0 insertions, 384 deletions
diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index fc31a271830b..9861407d644a 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -32,7 +32,6 @@ mv64x60-$(CONFIG_PCI) += mv64x60_pci.o
obj-$(CONFIG_MV64X60) += $(mv64x60-y) mv64x60_pic.o mv64x60_dev.o \
mv64x60_udbg.o
obj-$(CONFIG_RTC_DRV_CMOS) += rtc_cmos_setup.o
-obj-$(CONFIG_AXON_RAM) += axonram.o
obj-$(CONFIG_PPC_INDIRECT_PCI) += indirect_pci.o
obj-$(CONFIG_PPC_I8259) += i8259.o
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
deleted file mode 100644
index 53b7f8ef570f..000000000000
--- a/arch/powerpc/sysdev/axonram.c
+++ /dev/null
@@ -1,383 +0,0 @@
-/*
- * (C) Copyright IBM Deutschland Entwicklung GmbH 2006
- *
- * Author: Maxim Shchetynin <maxim@de.ibm.com>
- *
- * Axon DDR2 device driver.
- * It registers one block device per Axon's DDR2 memory bank found on a system.
- * Block devices are called axonram?, their major and minor numbers are
- * available in /proc/devices, /proc/partitions or in /sys/block/axonram?/dev.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <linux/bio.h>
-#include <linux/blkdev.h>
-#include <linux/dax.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/genhd.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/irq.h>
-#include <linux/irqreturn.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/pfn_t.h>
-#include <linux/uio.h>
-
-#include <asm/page.h>
-#include <asm/prom.h>
-
-#define AXON_RAM_MODULE_NAME "axonram"
-#define AXON_RAM_DEVICE_NAME "axonram"
-#define AXON_RAM_MINORS_PER_DISK 16
-#define AXON_RAM_BLOCK_SHIFT PAGE_SHIFT
-#define AXON_RAM_BLOCK_SIZE 1 << AXON_RAM_BLOCK_SHIFT
-#define AXON_RAM_SECTOR_SHIFT 9
-#define AXON_RAM_SECTOR_SIZE 1 << AXON_RAM_SECTOR_SHIFT
-#define AXON_RAM_IRQ_FLAGS IRQF_SHARED | IRQF_TRIGGER_RISING
-
-static int azfs_major, azfs_minor;
-
-struct axon_ram_bank {
- struct platform_device *device;
- struct gendisk *disk;
- struct dax_device *dax_dev;
- unsigned int irq_id;
- unsigned long ph_addr;
- unsigned long io_addr;
- unsigned long size;
- unsigned long ecc_counter;
-};
-
-static ssize_t
-axon_ram_sysfs_ecc(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct platform_device *device = to_platform_device(dev);
- struct axon_ram_bank *bank = device->dev.platform_data;
-
- BUG_ON(!bank);
-
- return sprintf(buf, "%ld\n", bank->ecc_counter);
-}
-
-static DEVICE_ATTR(ecc, 0444, axon_ram_sysfs_ecc, NULL);
-
-/**
- * axon_ram_irq_handler - interrupt handler for Axon RAM ECC
- * @irq: interrupt ID
- * @dev: pointer to of_device
- */
-static irqreturn_t
-axon_ram_irq_handler(int irq, void *dev)
-{
- struct platform_device *device = dev;
- struct axon_ram_bank *bank = device->dev.platform_data;
-
- BUG_ON(!bank);
-
- dev_err(&device->dev, "Correctable memory error occurred\n");
- bank->ecc_counter++;
- return IRQ_HANDLED;
-}
-
-/**
- * axon_ram_make_request - make_request() method for block device
- * @queue, @bio: see blk_queue_make_request()
- */
-static blk_qc_t
-axon_ram_make_request(struct request_queue *queue, struct bio *bio)
-{
- struct axon_ram_bank *bank = bio->bi_disk->private_data;
- unsigned long phys_mem, phys_end;
- void *user_mem;
- struct bio_vec vec;
- unsigned int transfered;
- struct bvec_iter iter;
-
- phys_mem = bank->io_addr + (bio->bi_iter.bi_sector <<
- AXON_RAM_SECTOR_SHIFT);
- phys_end = bank->io_addr + bank->size;
- transfered = 0;
- bio_for_each_segment(vec, bio, iter) {
- if (unlikely(phys_mem + vec.bv_len > phys_end)) {
- bio_io_error(bio);
- return BLK_QC_T_NONE;
- }
-
- user_mem = page_address(vec.bv_page) + vec.bv_offset;
- if (bio_data_dir(bio) == READ)
- memcpy(user_mem, (void *) phys_mem, vec.bv_len);
- else
- memcpy((void *) phys_mem, user_mem, vec.bv_len);
-
- phys_mem += vec.bv_len;
- transfered += vec.bv_len;
- }
- bio_endio(bio);
- return BLK_QC_T_NONE;
-}
-
-static const struct block_device_operations axon_ram_devops = {
- .owner = THIS_MODULE,
-};
-
-static long
-__axon_ram_direct_access(struct axon_ram_bank *bank, pgoff_t pgoff, long nr_pages,
- void **kaddr, pfn_t *pfn)
-{
- resource_size_t offset = pgoff * PAGE_SIZE;
-
- *kaddr = (void *) bank->io_addr + offset;
- *pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV);
- return (bank->size - offset) / PAGE_SIZE;
-}
-
-static long
-axon_ram_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages,
- void **kaddr, pfn_t *pfn)
-{
- struct axon_ram_bank *bank = dax_get_private(dax_dev);
-
- return __axon_ram_direct_access(bank, pgoff, nr_pages, kaddr, pfn);
-}
-
-static size_t axon_ram_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff,
- void *addr, size_t bytes, struct iov_iter *i)
-{
- return copy_from_iter(addr, bytes, i);
-}
-
-static const struct dax_operations axon_ram_dax_ops = {
- .direct_access = axon_ram_dax_direct_access,
- .copy_from_iter = axon_ram_copy_from_iter,
-};
-
-/**
- * axon_ram_probe - probe() method for platform driver
- * @device: see platform_driver method
- */
-static int axon_ram_probe(struct platform_device *device)
-{
- static int axon_ram_bank_id = -1;
- struct axon_ram_bank *bank;
- struct resource resource;
- int rc;
-
- axon_ram_bank_id++;
-
- dev_info(&device->dev, "Found memory controller on %pOF\n",
- device->dev.of_node);
-
- bank = kzalloc(sizeof(*bank), GFP_KERNEL);
- if (!bank)
- return -ENOMEM;
-
- device->dev.platform_data = bank;
-
- bank->device = device;
-
- if (of_address_to_resource(device->dev.of_node, 0, &resource) != 0) {
- dev_err(&device->dev, "Cannot access device tree\n");
- rc = -EFAULT;
- goto failed;
- }
-
- bank->size = resource_size(&resource);
-
- if (bank->size == 0) {
- dev_err(&device->dev, "No DDR2 memory found for %s%d\n",
- AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
- rc = -ENODEV;
- goto failed;
- }
-
- dev_info(&device->dev, "Register DDR2 memory device %s%d with %luMB\n",
- AXON_RAM_DEVICE_NAME, axon_ram_bank_id, bank->size >> 20);
-
- bank->ph_addr = resource.start;
- bank->io_addr = (unsigned long) ioremap_prot(
- bank->ph_addr, bank->size, _PAGE_NO_CACHE);
- if (bank->io_addr == 0) {
- dev_err(&device->dev, "ioremap() failed\n");
- rc = -EFAULT;
- goto failed;
- }
-
- bank->disk = alloc_disk(AXON_RAM_MINORS_PER_DISK);
- if (bank->disk == NULL) {
- dev_err(&device->dev, "Cannot register disk\n");
- rc = -EFAULT;
- goto failed;
- }
-
-
- bank->disk->major = azfs_major;
- bank->disk->first_minor = azfs_minor;
- bank->disk->fops = &axon_ram_devops;
- bank->disk->private_data = bank;
-
- sprintf(bank->disk->disk_name, "%s%d",
- AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
-
- bank->dax_dev = alloc_dax(bank, bank->disk->disk_name,
- &axon_ram_dax_ops);
- if (!bank->dax_dev) {
- rc = -ENOMEM;
- goto failed;
- }
-
- bank->disk->queue = blk_alloc_queue(GFP_KERNEL);
- if (bank->disk->queue == NULL) {
- dev_err(&device->dev, "Cannot register disk queue\n");
- rc = -EFAULT;
- goto failed;
- }
-
- set_capacity(bank->disk, bank->size >> AXON_RAM_SECTOR_SHIFT);
- blk_queue_make_request(bank->disk->queue, axon_ram_make_request);
- blk_queue_logical_block_size(bank->disk->queue, AXON_RAM_SECTOR_SIZE);
- device_add_disk(&device->dev, bank->disk);
-
- bank->irq_id = irq_of_parse_and_map(device->dev.of_node, 0);
- if (!bank->irq_id) {
- dev_err(&device->dev, "Cannot access ECC interrupt ID\n");
- rc = -EFAULT;
- goto failed;
- }
-
- rc = request_irq(bank->irq_id, axon_ram_irq_handler,
- AXON_RAM_IRQ_FLAGS, bank->disk->disk_name, device);
- if (rc != 0) {
- dev_err(&device->dev, "Cannot register ECC interrupt handler\n");
- bank->irq_id = 0;
- rc = -EFAULT;
- goto failed;
- }
-
- rc = device_create_file(&device->dev, &dev_attr_ecc);
- if (rc != 0) {
- dev_err(&device->dev, "Cannot create sysfs file\n");
- rc = -EFAULT;
- goto failed;
- }
-
- azfs_minor += bank->disk->minors;
-
- return 0;
-
-failed:
- if (bank->irq_id)
- free_irq(bank->irq_id, device);
- if (bank->disk != NULL) {
- if (bank->disk->major > 0)
- unregister_blkdev(bank->disk->major,
- bank->disk->disk_name);
- if (bank->disk->flags & GENHD_FL_UP)
- del_gendisk(bank->disk);
- put_disk(bank->disk);
- }
- kill_dax(bank->dax_dev);
- put_dax(bank->dax_dev);
- device->dev.platform_data = NULL;
- if (bank->io_addr != 0)
- iounmap((void __iomem *) bank->io_addr);
- kfree(bank);
- return rc;
-}
-
-/**
- * axon_ram_remove - remove() method for platform driver
- * @device: see of_platform_driver method
- */
-static int
-axon_ram_remove(struct platform_device *device)
-{
- struct axon_ram_bank *bank = device->dev.platform_data;
-
- BUG_ON(!bank || !bank->disk);
-
- device_remove_file(&device->dev, &dev_attr_ecc);
- free_irq(bank->irq_id, device);
- kill_dax(bank->dax_dev);
- put_dax(bank->dax_dev);
- del_gendisk(bank->disk);
- put_disk(bank->disk);
- iounmap((void __iomem *) bank->io_addr);
- kfree(bank);
-
- return 0;
-}
-
-static const struct of_device_id axon_ram_device_id[] = {
- {
- .type = "dma-memory"
- },
- {}
-};
-MODULE_DEVICE_TABLE(of, axon_ram_device_id);
-
-static struct platform_driver axon_ram_driver = {
- .probe = axon_ram_probe,
- .remove = axon_ram_remove,
- .driver = {
- .name = AXON_RAM_MODULE_NAME,
- .of_match_table = axon_ram_device_id,
- },
-};
-
-/**
- * axon_ram_init
- */
-static int __init
-axon_ram_init(void)
-{
- azfs_major = register_blkdev(azfs_major, AXON_RAM_DEVICE_NAME);
- if (azfs_major < 0) {
- printk(KERN_ERR "%s cannot become block device major number\n",
- AXON_RAM_MODULE_NAME);
- return -EFAULT;
- }
- azfs_minor = 0;
-
- return platform_driver_register(&axon_ram_driver);
-}
-
-/**
- * axon_ram_exit
- */
-static void __exit
-axon_ram_exit(void)
-{
- platform_driver_unregister(&axon_ram_driver);
- unregister_blkdev(azfs_major, AXON_RAM_DEVICE_NAME);
-}
-
-module_init(axon_ram_init);
-module_exit(axon_ram_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Maxim Shchetynin <maxim@de.ibm.com>");
-MODULE_DESCRIPTION("Axon DDR2 RAM device driver for IBM Cell BE");
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 19:17:38 +0100