[POWERPC] ps3: add ps3 platform system bus support
Adds a PS3 system bus driver. This system bus is a virtual bus used to present the PS3 system devices in the LDM. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Geoff Levand
Paul Mackerras
Родитель
de91a53429
Коммит
a3d4d6435b
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@ -77,3 +77,4 @@ obj-$(CONFIG_CRYPTO) += crypto/
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obj-$(CONFIG_SUPERH) += sh/
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obj-$(CONFIG_GENERIC_TIME) += clocksource/
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obj-$(CONFIG_DMA_ENGINE) += dma/
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obj-$(CONFIG_PS3) += ps3/
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@ -0,0 +1 @@
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obj-y += system-bus.o
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@ -0,0 +1,358 @@
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/*
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* PS3 system bus driver.
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*
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* Copyright (C) 2006 Sony Computer Entertainment Inc.
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* Copyright 2006 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <asm/udbg.h>
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#include <asm/ps3.h>
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#include <asm/lv1call.h>
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#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
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static void _dump_mmio_region(const struct ps3_mmio_region* r,
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const char* func, int line)
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{
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pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
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r->did.dev_id);
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pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
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pr_debug("%s:%d: len %lxh\n", func, line, r->len);
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pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
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}
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int ps3_mmio_region_create(struct ps3_mmio_region *r)
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{
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int result;
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result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
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r->bus_addr, r->len, r->page_size, &r->lpar_addr);
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if (result) {
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pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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r->lpar_addr = r->len = r->bus_addr = 0;
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}
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dump_mmio_region(r);
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return result;
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}
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int ps3_free_mmio_region(struct ps3_mmio_region *r)
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{
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int result;
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result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
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r->bus_addr);
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if (result)
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pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
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__func__, __LINE__, ps3_result(result));
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r->lpar_addr = r->len = r->bus_addr = 0;
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return result;
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}
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static int ps3_system_bus_match(struct device *_dev,
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struct device_driver *_drv)
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{
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int result;
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struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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result = dev->match_id == drv->match_id;
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pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
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dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
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(result ? "match" : "miss"));
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return result;
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}
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static int ps3_system_bus_probe(struct device *_dev)
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{
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int result;
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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struct ps3_system_bus_driver *drv =
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to_ps3_system_bus_driver(_dev->driver);
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result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
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if (result) {
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pr_debug("%s:%d: lv1_open_device failed (%d)\n",
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__func__, __LINE__, result);
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result = -EACCES;
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goto clean_none;
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}
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if (dev->d_region->did.bus_id) {
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result = ps3_dma_region_create(dev->d_region);
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if (result) {
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pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
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__func__, __LINE__, result);
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BUG_ON("check region type");
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result = -EINVAL;
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goto clean_device;
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}
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}
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BUG_ON(!drv);
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if (drv->probe)
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result = drv->probe(dev);
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else
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pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
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dev->core.bus_id);
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if (result) {
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pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
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goto clean_dma;
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}
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return result;
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clean_dma:
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ps3_dma_region_free(dev->d_region);
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clean_device:
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lv1_close_device(dev->did.bus_id, dev->did.dev_id);
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clean_none:
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return result;
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}
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static int ps3_system_bus_remove(struct device *_dev)
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{
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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struct ps3_system_bus_driver *drv =
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to_ps3_system_bus_driver(_dev->driver);
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if (drv->remove)
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drv->remove(dev);
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else
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pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
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dev->core.bus_id);
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ps3_dma_region_free(dev->d_region);
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ps3_free_mmio_region(dev->m_region);
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lv1_close_device(dev->did.bus_id, dev->did.dev_id);
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return 0;
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}
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struct bus_type ps3_system_bus_type = {
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.name = "ps3_system_bus",
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.match = ps3_system_bus_match,
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.probe = ps3_system_bus_probe,
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.remove = ps3_system_bus_remove,
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};
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int __init ps3_system_bus_init(void)
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{
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int result;
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result = bus_register(&ps3_system_bus_type);
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BUG_ON(result);
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return result;
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}
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core_initcall(ps3_system_bus_init);
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/* Allocates a contiguous real buffer and creates mappings over it.
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* Returns the virtual address of the buffer and sets dma_handle
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* to the dma address (mapping) of the first page.
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*/
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static void * ps3_alloc_coherent(struct device *_dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag)
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{
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int result;
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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unsigned long virt_addr;
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BUG_ON(!dev->d_region->bus_addr);
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flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
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flag |= __GFP_ZERO;
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virt_addr = __get_free_pages(flag, get_order(size));
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if (!virt_addr) {
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pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
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goto clean_none;
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}
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result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
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if (result) {
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pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
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__func__, __LINE__, result);
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BUG_ON("check region type");
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goto clean_alloc;
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}
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return (void*)virt_addr;
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clean_alloc:
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free_pages(virt_addr, get_order(size));
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clean_none:
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dma_handle = NULL;
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return NULL;
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}
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static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
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dma_addr_t dma_handle)
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{
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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ps3_dma_unmap(dev->d_region, dma_handle, size);
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free_pages((unsigned long)vaddr, get_order(size));
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}
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/* Creates TCEs for a user provided buffer. The user buffer must be
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* contiguous real kernel storage (not vmalloc). The address of the buffer
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* passed here is the kernel (virtual) address of the buffer. The buffer
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* need not be page aligned, the dma_addr_t returned will point to the same
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* byte within the page as vaddr.
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*/
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static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
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enum dma_data_direction direction)
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{
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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int result;
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unsigned long bus_addr;
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result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
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&bus_addr);
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if (result) {
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pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
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__func__, __LINE__, result);
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}
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return bus_addr;
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}
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static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction direction)
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{
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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int result;
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result = ps3_dma_unmap(dev->d_region, dma_addr, size);
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if (result) {
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pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
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__func__, __LINE__, result);
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}
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}
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static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction)
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{
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#if defined(CONFIG_PS3_DYNAMIC_DMA)
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BUG_ON("do");
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#endif
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return 0;
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}
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static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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#if defined(CONFIG_PS3_DYNAMIC_DMA)
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BUG_ON("do");
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#endif
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}
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static int ps3_dma_supported(struct device *_dev, u64 mask)
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{
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return 1;
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}
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static struct dma_mapping_ops ps3_dma_ops = {
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.alloc_coherent = ps3_alloc_coherent,
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.free_coherent = ps3_free_coherent,
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.map_single = ps3_map_single,
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.unmap_single = ps3_unmap_single,
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.map_sg = ps3_map_sg,
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.unmap_sg = ps3_unmap_sg,
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.dma_supported = ps3_dma_supported
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};
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/**
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* ps3_system_bus_release_device - remove a device from the system bus
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*/
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static void ps3_system_bus_release_device(struct device *_dev)
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{
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struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
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kfree(dev);
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}
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/**
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* ps3_system_bus_device_register - add a device to the system bus
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*
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* ps3_system_bus_device_register() expects the dev object to be allocated
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* dynamically by the caller. The system bus takes ownership of the dev
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* object and frees the object in ps3_system_bus_release_device().
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*/
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int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
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{
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int result;
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static unsigned int dev_count = 1;
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dev->core.parent = NULL;
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dev->core.bus = &ps3_system_bus_type;
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dev->core.release = ps3_system_bus_release_device;
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dev->core.archdata.of_node = NULL;
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dev->core.archdata.dma_ops = &ps3_dma_ops;
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dev->core.archdata.numa_node = 0;
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snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
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dev_count++);
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pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
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result = device_register(&dev->core);
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return result;
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}
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EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
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int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
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{
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int result;
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drv->core.bus = &ps3_system_bus_type;
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result = driver_register(&drv->core);
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return result;
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}
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EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
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void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
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{
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driver_unregister(&drv->core);
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}
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EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
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@ -386,4 +386,77 @@ int ps3_repository_read_num_spu_resource_id(unsigned int *num_resource_id);
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int ps3_repository_read_spu_resource_id(unsigned int res_index,
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enum ps3_spu_resource_type* resource_type, unsigned int *resource_id);
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/* system bus routines */
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enum ps3_match_id {
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PS3_MATCH_ID_EHCI = 1,
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PS3_MATCH_ID_OHCI,
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PS3_MATCH_ID_GELIC,
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PS3_MATCH_ID_AV_SETTINGS,
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PS3_MATCH_ID_SYSTEM_MANAGER,
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};
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/**
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* struct ps3_system_bus_device - a device on the system bus
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*/
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struct ps3_system_bus_device {
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enum ps3_match_id match_id;
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struct ps3_device_id did;
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unsigned int interrupt_id;
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/* struct iommu_table *iommu_table; -- waiting for Ben's cleanups */
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struct ps3_dma_region *d_region;
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struct ps3_mmio_region *m_region;
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struct device core;
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};
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/**
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* struct ps3_system_bus_driver - a driver for a device on the system bus
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*/
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struct ps3_system_bus_driver {
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enum ps3_match_id match_id;
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struct device_driver core;
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int (*probe)(struct ps3_system_bus_device *);
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int (*remove)(struct ps3_system_bus_device *);
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/* int (*suspend)(struct ps3_system_bus_device *, pm_message_t); */
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/* int (*resume)(struct ps3_system_bus_device *); */
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};
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int ps3_system_bus_device_register(struct ps3_system_bus_device *dev);
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int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv);
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void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv);
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static inline struct ps3_system_bus_driver *to_ps3_system_bus_driver(
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struct device_driver *_drv)
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{
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return container_of(_drv, struct ps3_system_bus_driver, core);
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}
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static inline struct ps3_system_bus_device *to_ps3_system_bus_device(
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struct device *_dev)
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{
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return container_of(_dev, struct ps3_system_bus_device, core);
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}
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/**
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* ps3_system_bus_set_drvdata -
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* @dev: device structure
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* @data: Data to set
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*/
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static inline void ps3_system_bus_set_driver_data(
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struct ps3_system_bus_device *dev, void *data)
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{
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dev->core.driver_data = data;
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}
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static inline void *ps3_system_bus_get_driver_data(
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struct ps3_system_bus_device *dev)
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{
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return dev->core.driver_data;
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}
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/* These two need global scope for get_dma_ops(). */
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extern struct bus_type ps3_system_bus_type;
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#endif
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