Release 4.14 arch/powerpc/platforms/pseries/ibmebus.c
/*
* IBM PowerPC IBM eBus Infrastructure Support.
*
* Copyright (c) 2005 IBM Corporation
* Joachim Fenkes <fenkes@de.ibm.com>
* Heiko J Schick <schickhj@de.ibm.com>
*
* All rights reserved.
*
* This source code is distributed under a dual license of GPL v2.0 and OpenIB
* BSD.
*
* OpenIB BSD License
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/init.h>
#include <linux/export.h>
#include <linux/console.h>
#include <linux/kobject.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/of_platform.h>
#include <asm/ibmebus.h>
static struct device ibmebus_bus_device = { /* fake "parent" device */
.init_name = "ibmebus",
};
struct bus_type ibmebus_bus_type;
/* These devices will automatically be added to the bus during init */
static const struct of_device_id ibmebus_matches[] __initconst = {
{ .compatible = "IBM,lhca" },
{ .compatible = "IBM,lhea" },
{},
};
static void *ibmebus_alloc_coherent(struct device *dev,
size_t size,
dma_addr_t *dma_handle,
gfp_t flag,
unsigned long attrs)
{
void *mem;
mem = kmalloc(size, flag);
*dma_handle = (dma_addr_t)mem;
return mem;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 46 | 92.00% | 1 | 33.33% |
Andrzej Pietrasiewicz | 2 | 4.00% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 4.00% | 1 | 33.33% |
Total | 50 | 100.00% | 3 | 100.00% |
static void ibmebus_free_coherent(struct device *dev,
size_t size, void *vaddr,
dma_addr_t dma_handle,
unsigned long attrs)
{
kfree(vaddr);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 26 | 86.67% | 1 | 33.33% |
Krzysztof Kozlowski | 2 | 6.67% | 1 | 33.33% |
Andrzej Pietrasiewicz | 2 | 6.67% | 1 | 33.33% |
Total | 30 | 100.00% | 3 | 100.00% |
static dma_addr_t ibmebus_map_page(struct device *dev,
struct page *page,
unsigned long offset,
size_t size,
enum dma_data_direction direction,
unsigned long attrs)
{
return (dma_addr_t)(page_address(page) + offset);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 26 | 59.09% | 1 | 25.00% |
Mark Nelson | 16 | 36.36% | 2 | 50.00% |
Krzysztof Kozlowski | 2 | 4.55% | 1 | 25.00% |
Total | 44 | 100.00% | 4 | 100.00% |
static void ibmebus_unmap_page(struct device *dev,
dma_addr_t dma_addr,
size_t size,
enum dma_data_direction direction,
unsigned long attrs)
{
return;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 21 | 80.77% | 1 | 25.00% |
Mark Nelson | 3 | 11.54% | 2 | 50.00% |
Krzysztof Kozlowski | 2 | 7.69% | 1 | 25.00% |
Total | 26 | 100.00% | 4 | 100.00% |
static int ibmebus_map_sg(struct device *dev,
struct scatterlist *sgl,
int nents, enum dma_data_direction direction,
unsigned long attrs)
{
struct scatterlist *sg;
int i;
for_each_sg(sgl, sg, nents, i) {
sg->dma_address = (dma_addr_t) sg_virt(sg);
sg->dma_length = sg->length;
}
return nents;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 37 | 52.86% | 1 | 16.67% |
Jens Axboe | 18 | 25.71% | 2 | 33.33% |
Joachim Fenkes | 11 | 15.71% | 1 | 16.67% |
Krzysztof Kozlowski | 2 | 2.86% | 1 | 16.67% |
Mark Nelson | 2 | 2.86% | 1 | 16.67% |
Total | 70 | 100.00% | 6 | 100.00% |
static void ibmebus_unmap_sg(struct device *dev,
struct scatterlist *sg,
int nents, enum dma_data_direction direction,
unsigned long attrs)
{
return;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 22 | 78.57% | 1 | 25.00% |
Krzysztof Kozlowski | 2 | 7.14% | 1 | 25.00% |
Heiko J Schick | 2 | 7.14% | 1 | 25.00% |
Mark Nelson | 2 | 7.14% | 1 | 25.00% |
Total | 28 | 100.00% | 4 | 100.00% |
static int ibmebus_dma_supported(struct device *dev, u64 mask)
{
return mask == DMA_BIT_MASK(64);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Milton D. Miller II | 8 | 36.36% | 1 | 33.33% |
Joachim Fenkes | 8 | 36.36% | 1 | 33.33% |
Heiko J Schick | 6 | 27.27% | 1 | 33.33% |
Total | 22 | 100.00% | 3 | 100.00% |
static u64 ibmebus_dma_get_required_mask(struct device *dev)
{
return DMA_BIT_MASK(64);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Milton D. Miller II | 15 | 88.24% | 1 | 50.00% |
Joachim Fenkes | 2 | 11.76% | 1 | 50.00% |
Total | 17 | 100.00% | 2 | 100.00% |
static const struct dma_map_ops ibmebus_dma_ops = {
.alloc = ibmebus_alloc_coherent,
.free = ibmebus_free_coherent,
.map_sg = ibmebus_map_sg,
.unmap_sg = ibmebus_unmap_sg,
.dma_supported = ibmebus_dma_supported,
.get_required_mask = ibmebus_dma_get_required_mask,
.map_page = ibmebus_map_page,
.unmap_page = ibmebus_unmap_page,
};
static int ibmebus_match_path(struct device *dev, void *data)
{
struct device_node *dn = to_platform_device(dev)->dev.of_node;
return (of_find_node_by_path(data) == dn);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 33 | 84.62% | 1 | 25.00% |
Grant C. Likely | 4 | 10.26% | 2 | 50.00% |
Rob Herring | 2 | 5.13% | 1 | 25.00% |
Total | 39 | 100.00% | 4 | 100.00% |
static int ibmebus_match_node(struct device *dev, void *data)
{
return to_platform_device(dev)->dev.of_node == data;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 23 | 85.19% | 1 | 33.33% |
Grant C. Likely | 4 | 14.81% | 2 | 66.67% |
Total | 27 | 100.00% | 3 | 100.00% |
static int ibmebus_create_device(struct device_node *dn)
{
struct platform_device *dev;
int ret;
dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
if (!dev)
return -ENOMEM;
dev->dev.bus = &ibmebus_bus_type;
dev->dev.dma_ops = &ibmebus_dma_ops;
ret = of_device_add(dev);
if (ret)
platform_device_put(dev);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 74 | 96.10% | 1 | 33.33% |
Grant C. Likely | 3 | 3.90% | 2 | 66.67% |
Total | 77 | 100.00% | 3 | 100.00% |
static int ibmebus_create_devices(const struct of_device_id *matches)
{
struct device_node *root, *child;
struct device *dev;
int ret = 0;
root = of_find_node_by_path("/");
for_each_child_of_node(root, child) {
if (!of_match_node(matches, child))
continue;
dev = bus_find_device(&ibmebus_bus_type, NULL, child,
ibmebus_match_node);
if (dev) {
put_device(dev);
continue;
}
ret = ibmebus_create_device(child);
if (ret) {
printk(KERN_ERR "%s: failed to create device (%i)",
__func__, ret);
of_node_put(child);
break;
}
}
of_node_put(root);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 97 | 81.51% | 1 | 25.00% |
Johan Hovold | 18 | 15.13% | 1 | 25.00% |
Stephen Rothwell | 3 | 2.52% | 1 | 25.00% |
Harvey Harrison | 1 | 0.84% | 1 | 25.00% |
Total | 119 | 100.00% | 4 | 100.00% |
int ibmebus_register_driver(struct platform_driver *drv)
{
/* If the driver uses devices that ibmebus doesn't know, add them */
ibmebus_create_devices(drv->driver.of_match_table);
drv->driver.bus = &ibmebus_bus_type;
return driver_register(&drv->driver);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 16 | 42.11% | 2 | 28.57% |
Joachim Fenkes | 16 | 42.11% | 2 | 28.57% |
Heiko J Schick | 3 | 7.89% | 1 | 14.29% |
Stephen Rothwell | 2 | 5.26% | 1 | 14.29% |
Rob Herring | 1 | 2.63% | 1 | 14.29% |
Total | 38 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(ibmebus_register_driver);
void ibmebus_unregister_driver(struct platform_driver *drv)
{
driver_unregister(&drv->driver);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 7 | 38.89% | 1 | 25.00% |
Joachim Fenkes | 6 | 33.33% | 1 | 25.00% |
Grant C. Likely | 4 | 22.22% | 1 | 25.00% |
Rob Herring | 1 | 5.56% | 1 | 25.00% |
Total | 18 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(ibmebus_unregister_driver);
int ibmebus_request_irq(u32 ist, irq_handler_t handler,
unsigned long irq_flags, const char *devname,
void *dev_id)
{
unsigned int irq = irq_create_mapping(NULL, ist);
if (!irq)
return -EINVAL;
return request_irq(irq, handler, irq_flags, devname, dev_id);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 53 | 91.38% | 1 | 25.00% |
Benjamin Herrenschmidt | 3 | 5.17% | 1 | 25.00% |
Michael Ellerman | 1 | 1.72% | 1 | 25.00% |
David Howells | 1 | 1.72% | 1 | 25.00% |
Total | 58 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(ibmebus_request_irq);
void ibmebus_free_irq(u32 ist, void *dev_id)
{
unsigned int irq = irq_find_mapping(NULL, ist);
free_irq(irq, dev_id);
irq_dispose_mapping(irq);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 27 | 77.14% | 1 | 33.33% |
Sébastien Dugué | 5 | 14.29% | 1 | 33.33% |
Benjamin Herrenschmidt | 3 | 8.57% | 1 | 33.33% |
Total | 35 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(ibmebus_free_irq);
static char *ibmebus_chomp(const char *in, size_t count)
{
char *out = kmalloc(count + 1, GFP_KERNEL);
if (!out)
return NULL;
memcpy(out, in, count);
out[count] = '\0';
if (out[count - 1] == '\n')
out[count - 1] = '\0';
return out;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 75 | 100.00% | 2 | 100.00% |
Total | 75 | 100.00% | 2 | 100.00% |
static ssize_t ibmebus_store_probe(struct bus_type *bus,
const char *buf, size_t count)
{
struct device_node *dn = NULL;
struct device *dev;
char *path;
ssize_t rc = 0;
path = ibmebus_chomp(buf, count);
if (!path)
return -ENOMEM;
dev = bus_find_device(&ibmebus_bus_type, NULL, path,
ibmebus_match_path);
if (dev) {
put_device(dev);
printk(KERN_WARNING "%s: %s has already been probed\n",
__func__, path);
rc = -EEXIST;
goto out;
}
if ((dn = of_find_node_by_path(path))) {
rc = ibmebus_create_device(dn);
of_node_put(dn);
} else {
printk(KERN_WARNING "%s: no such device node: %s\n",
__func__, path);
rc = -ENODEV;
}
out:
kfree(path);
if (rc)
return rc;
return count;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 143 | 88.82% | 4 | 66.67% |
Johan Hovold | 16 | 9.94% | 1 | 16.67% |
Harvey Harrison | 2 | 1.24% | 1 | 16.67% |
Total | 161 | 100.00% | 6 | 100.00% |
static BUS_ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe);
static ssize_t ibmebus_store_remove(struct bus_type *bus,
const char *buf, size_t count)
{
struct device *dev;
char *path;
path = ibmebus_chomp(buf, count);
if (!path)
return -ENOMEM;
if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
ibmebus_match_path))) {
of_device_unregister(to_platform_device(dev));
put_device(dev);
kfree(path);
return count;
} else {
printk(KERN_WARNING "%s: %s not on the bus\n",
__func__, path);
kfree(path);
return -ENODEV;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 102 | 93.58% | 3 | 50.00% |
Johan Hovold | 5 | 4.59% | 1 | 16.67% |
Grant C. Likely | 1 | 0.92% | 1 | 16.67% |
Harvey Harrison | 1 | 0.92% | 1 | 16.67% |
Total | 109 | 100.00% | 6 | 100.00% |
static BUS_ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove);
static struct attribute *ibmbus_bus_attrs[] = {
&bus_attr_probe.attr,
&bus_attr_remove.attr,
NULL,
};
ATTRIBUTE_GROUPS(ibmbus_bus);
static int ibmebus_bus_bus_match(struct device *dev, struct device_driver *drv)
{
const struct of_device_id *matches = drv->of_match_table;
if (!matches)
return 0;
return of_match_device(matches, dev) != NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 42 | 95.45% | 1 | 50.00% |
Joachim Fenkes | 2 | 4.55% | 1 | 50.00% |
Total | 44 | 100.00% | 2 | 100.00% |
static int ibmebus_bus_device_probe(struct device *dev)
{
int error = -ENODEV;
struct platform_driver *drv;
struct platform_device *of_dev;
drv = to_platform_driver(dev->driver);
of_dev = to_platform_device(dev);
if (!drv->probe)
return error;
of_dev_get(of_dev);
if (of_driver_match_device(dev, dev->driver))
error = drv->probe(of_dev);
if (error)
of_dev_put(of_dev);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 76 | 84.44% | 1 | 25.00% |
Rob Herring | 8 | 8.89% | 1 | 25.00% |
Joachim Fenkes | 6 | 6.67% | 2 | 50.00% |
Total | 90 | 100.00% | 4 | 100.00% |
static int ibmebus_bus_device_remove(struct device *dev)
{
struct platform_device *of_dev = to_platform_device(dev);
struct platform_driver *drv = to_platform_driver(dev->driver);
if (dev->driver && drv->remove)
drv->remove(of_dev);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 42 | 79.25% | 1 | 25.00% |
Joachim Fenkes | 7 | 13.21% | 1 | 25.00% |
Heiko J Schick | 2 | 3.77% | 1 | 25.00% |
Rob Herring | 2 | 3.77% | 1 | 25.00% |
Total | 53 | 100.00% | 4 | 100.00% |
static void ibmebus_bus_device_shutdown(struct device *dev)
{
struct platform_device *of_dev = to_platform_device(dev);
struct platform_driver *drv = to_platform_driver(dev->driver);
if (dev->driver && drv->shutdown)
drv->shutdown(of_dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 47 | 94.00% | 1 | 33.33% |
Rob Herring | 2 | 4.00% | 1 | 33.33% |
Heiko J Schick | 1 | 2.00% | 1 | 33.33% |
Total | 50 | 100.00% | 3 | 100.00% |
/*
* ibmebus_bus_device_attrs
*/
static ssize_t devspec_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct platform_device *ofdev;
ofdev = to_platform_device(dev);
return sprintf(buf, "%pOF\n", ofdev->dev.of_node);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 45 | 97.83% | 1 | 50.00% |
Rob Herring | 1 | 2.17% | 1 | 50.00% |
Total | 46 | 100.00% | 2 | 100.00% |
static DEVICE_ATTR_RO(devspec);
static ssize_t name_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct platform_device *ofdev;
ofdev = to_platform_device(dev);
return sprintf(buf, "%s\n", ofdev->dev.of_node->name);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 48 | 100.00% | 1 | 100.00% |
Total | 48 | 100.00% | 1 | 100.00% |
static DEVICE_ATTR_RO(name);
static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return of_device_modalias(dev, buf, PAGE_SIZE);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Grant C. Likely | 28 | 93.33% | 1 | 50.00% |
Rob Herring | 2 | 6.67% | 1 | 50.00% |
Total | 30 | 100.00% | 2 | 100.00% |
static DEVICE_ATTR_RO(modalias);
static struct attribute *ibmebus_bus_device_attrs[] = {
&dev_attr_devspec.attr,
&dev_attr_name.attr,
&dev_attr_modalias.attr,
NULL,
};
ATTRIBUTE_GROUPS(ibmebus_bus_device);
struct bus_type ibmebus_bus_type = {
.name = "ibmebus",
.uevent = of_device_uevent_modalias,
.bus_groups = ibmbus_bus_groups,
.match = ibmebus_bus_bus_match,
.probe = ibmebus_bus_device_probe,
.remove = ibmebus_bus_device_remove,
.shutdown = ibmebus_bus_device_shutdown,
.dev_groups = ibmebus_bus_device_groups,
};
EXPORT_SYMBOL(ibmebus_bus_type);
static int __init ibmebus_bus_init(void)
{
int err;
printk(KERN_INFO "IBM eBus Device Driver\n");
err = bus_register(&ibmebus_bus_type);
if (err) {
printk(KERN_ERR "%s: failed to register IBM eBus.\n",
__func__);
return err;
}
err = device_register(&ibmebus_bus_device);
if (err) {
printk(KERN_WARNING "%s: device_register returned %i\n",
__func__, err);
bus_unregister(&ibmebus_bus_type);
return err;
}
err = ibmebus_create_devices(ibmebus_matches);
if (err) {
device_unregister(&ibmebus_bus_device);
bus_unregister(&ibmebus_bus_type);
return err;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Heiko J Schick | 53 | 49.53% | 1 | 16.67% |
Joachim Fenkes | 28 | 26.17% | 2 | 33.33% |
Grant C. Likely | 23 | 21.50% | 1 | 16.67% |
Harvey Harrison | 2 | 1.87% | 1 | 16.67% |
Paul Gortmaker | 1 | 0.93% | 1 | 16.67% |
Total | 107 | 100.00% | 6 | 100.00% |
postcore_initcall(ibmebus_bus_init);
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Joachim Fenkes | 723 | 39.88% | 6 | 13.64% |
Grant C. Likely | 443 | 24.43% | 7 | 15.91% |
Heiko J Schick | 370 | 20.41% | 1 | 2.27% |
Greg Kroah-Hartman | 81 | 4.47% | 2 | 4.55% |
Johan Hovold | 39 | 2.15% | 2 | 4.55% |
Mark Nelson | 33 | 1.82% | 2 | 4.55% |
Milton D. Miller II | 28 | 1.54% | 1 | 2.27% |
Rob Herring | 19 | 1.05% | 3 | 6.82% |
Jens Axboe | 18 | 0.99% | 2 | 4.55% |
Krzysztof Kozlowski | 12 | 0.66% | 1 | 2.27% |
Paul Gortmaker | 8 | 0.44% | 3 | 6.82% |
Benjamin Herrenschmidt | 6 | 0.33% | 1 | 2.27% |
Andrzej Pietrasiewicz | 6 | 0.33% | 1 | 2.27% |
Harvey Harrison | 6 | 0.33% | 1 | 2.27% |
Stephen Rothwell | 5 | 0.28% | 2 | 4.55% |
Sébastien Dugué | 5 | 0.28% | 1 | 2.27% |
Tejun Heo | 3 | 0.17% | 1 | 2.27% |
Uwe Kleine-König | 2 | 0.11% | 1 | 2.27% |
Bart Van Assche | 1 | 0.06% | 1 | 2.27% |
Kay Sievers | 1 | 0.06% | 1 | 2.27% |
David Howells | 1 | 0.06% | 1 | 2.27% |
FUJITA Tomonori | 1 | 0.06% | 1 | 2.27% |
Daniel Axtens | 1 | 0.06% | 1 | 2.27% |
Michael Ellerman | 1 | 0.06% | 1 | 2.27% |
Total | 1813 | 100.00% | 44 | 100.00% |
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