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Commit 80071802 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Paul Mackerras
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[POWERPC] PS3: Storage Driver Core 



Add storage driver core support for the PS3.
PS3 storage devices are a special kind of PS3 system bus device.

Signed-off-by: default avatarGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: default avatarGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 32d73318

arch/powerpc/platforms/ps3/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -98,4 +98,8 @@ config PS3_SYS_MANAGER 
	  This support is required for system control.  In

	  general, all users will say Y or M.



config PS3_STORAGE

	depends on PPC_PS3

	tristate



endmenu

drivers/ps3/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -3,3 +3,4 @@ obj-$(CONFIG_PS3_PS3AV) += ps3av_mod.o 
ps3av_mod-objs		+= ps3av.o ps3av_cmd.o

obj-$(CONFIG_PPC_PS3) += sys-manager-core.o

obj-$(CONFIG_PS3_SYS_MANAGER) += sys-manager.o

obj-$(CONFIG_PS3_STORAGE) += ps3stor_lib.o

drivers/ps3/ps3stor_lib.c

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+302 −0
Original line number Diff line number Diff line 
/*

 * PS3 Storage Library

 *

 * Copyright (C) 2007 Sony Computer Entertainment Inc.

 * Copyright 2007 Sony Corp.

 *

 * 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; version 2 of the License.

 *

 * 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.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */



#include <linux/dma-mapping.h>



#include <asm/lv1call.h>

#include <asm/ps3stor.h>





static int ps3stor_probe_access(struct ps3_storage_device *dev)

{

	int res, error;

	unsigned int i;

	unsigned long n;



	if (dev->sbd.match_id == PS3_MATCH_ID_STOR_ROM) {

		/* special case: CD-ROM is assumed always accessible */

		dev->accessible_regions = 1;

		return 0;

	}



	error = -EPERM;

	for (i = 0; i < dev->num_regions; i++) {

		dev_dbg(&dev->sbd.core,

			"%s:%u: checking accessibility of region %u\n",

			__func__, __LINE__, i);



		dev->region_idx = i;

		res = ps3stor_read_write_sectors(dev, dev->bounce_lpar, 0, 1,

						 0);

		if (res) {

			dev_dbg(&dev->sbd.core, "%s:%u: read failed, "

				"region %u is not accessible\n", __func__,

				__LINE__, i);

			continue;

		}



		dev_dbg(&dev->sbd.core, "%s:%u: region %u is accessible\n",

			__func__, __LINE__, i);

		set_bit(i, &dev->accessible_regions);



		/* We can access at least one region */

		error = 0;

	}

	if (error)

		return error;



	n = hweight_long(dev->accessible_regions);

	if (n > 1)

		dev_info(&dev->sbd.core,

			 "%s:%u: %lu accessible regions found. Only the first "

			 "one will be used",

			 __func__, __LINE__, n);

	dev->region_idx = __ffs(dev->accessible_regions);

	dev_info(&dev->sbd.core,

		 "First accessible region has index %u start %lu size %lu\n",

		 dev->region_idx, dev->regions[dev->region_idx].start,

		 dev->regions[dev->region_idx].size);



	return 0;

}





/**

 *	ps3stor_setup - Setup a storage device before use

 *	@dev: Pointer to a struct ps3_storage_device

 *	@handler: Pointer to an interrupt handler

 *

 *	Returns 0 for success, or an error code

 */

int ps3stor_setup(struct ps3_storage_device *dev, irq_handler_t handler)

{

	int error, res, alignment;

	enum ps3_dma_page_size page_size;



	error = ps3_open_hv_device(&dev->sbd);

	if (error) {

		dev_err(&dev->sbd.core,

			"%s:%u: ps3_open_hv_device failed %d\n", __func__,

			__LINE__, error);

		goto fail;

	}



	error = ps3_sb_event_receive_port_setup(&dev->sbd, PS3_BINDING_CPU_ANY,

						&dev->irq);

	if (error) {

		dev_err(&dev->sbd.core,

			"%s:%u: ps3_sb_event_receive_port_setup failed %d\n",

		       __func__, __LINE__, error);

		goto fail_close_device;

	}



	error = request_irq(dev->irq, handler, IRQF_DISABLED,

			    dev->sbd.core.driver->name, dev);

	if (error) {

		dev_err(&dev->sbd.core, "%s:%u: request_irq failed %d\n",

			__func__, __LINE__, error);

		goto fail_sb_event_receive_port_destroy;

	}



	alignment = min(__ffs(dev->bounce_size),

			__ffs((unsigned long)dev->bounce_buf));

	if (alignment < 12) {

		dev_err(&dev->sbd.core,

			"%s:%u: bounce buffer not aligned (%lx at 0x%p)\n",

			__func__, __LINE__, dev->bounce_size, dev->bounce_buf);

		error = -EINVAL;

		goto fail_free_irq;

	} else if (alignment < 16)

		page_size = PS3_DMA_4K;

	else

		page_size = PS3_DMA_64K;

	dev->sbd.d_region = &dev->dma_region;

	ps3_dma_region_init(&dev->sbd, &dev->dma_region, page_size,

			    PS3_DMA_OTHER, dev->bounce_buf, dev->bounce_size);

	res = ps3_dma_region_create(&dev->dma_region);

	if (res) {

		dev_err(&dev->sbd.core, "%s:%u: cannot create DMA region\n",

			__func__, __LINE__);

		error = -ENOMEM;

		goto fail_free_irq;

	}



	dev->bounce_lpar = ps3_mm_phys_to_lpar(__pa(dev->bounce_buf));

	dev->bounce_dma = dma_map_single(&dev->sbd.core, dev->bounce_buf,

					 dev->bounce_size, DMA_BIDIRECTIONAL);

	if (!dev->bounce_dma) {

		dev_err(&dev->sbd.core, "%s:%u: map DMA region failed\n",

			__func__, __LINE__);

		error = -ENODEV;

		goto fail_free_dma;

	}



	error = ps3stor_probe_access(dev);

	if (error) {

		dev_err(&dev->sbd.core, "%s:%u: No accessible regions found\n",

			__func__, __LINE__);

		goto fail_unmap_dma;

	}

	return 0;



fail_unmap_dma:

	dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,

			 DMA_BIDIRECTIONAL);

fail_free_dma:

	ps3_dma_region_free(&dev->dma_region);

fail_free_irq:

	free_irq(dev->irq, dev);

fail_sb_event_receive_port_destroy:

	ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);

fail_close_device:

	ps3_close_hv_device(&dev->sbd);

fail:

	return error;

}

EXPORT_SYMBOL_GPL(ps3stor_setup);





/**

 *	ps3stor_teardown - Tear down a storage device after use

 *	@dev: Pointer to a struct ps3_storage_device

 */

void ps3stor_teardown(struct ps3_storage_device *dev)

{

	int error;



	dma_unmap_single(&dev->sbd.core, dev->bounce_dma, dev->bounce_size,

			 DMA_BIDIRECTIONAL);

	ps3_dma_region_free(&dev->dma_region);



	free_irq(dev->irq, dev);



	error = ps3_sb_event_receive_port_destroy(&dev->sbd, dev->irq);

	if (error)

		dev_err(&dev->sbd.core,

			"%s:%u: destroy event receive port failed %d\n",

			__func__, __LINE__, error);



	error = ps3_close_hv_device(&dev->sbd);

	if (error)

		dev_err(&dev->sbd.core,

			"%s:%u: ps3_close_hv_device failed %d\n", __func__,

			__LINE__, error);

}

EXPORT_SYMBOL_GPL(ps3stor_teardown);





/**

 *	ps3stor_read_write_sectors - read/write from/to a storage device

 *	@dev: Pointer to a struct ps3_storage_device

 *	@lpar: HV logical partition address

 *	@start_sector: First sector to read/write

 *	@sectors: Number of sectors to read/write

 *	@write: Flag indicating write (non-zero) or read (zero)

 *

 *	Returns 0 for success, -1 in case of failure to submit the command, or

 *	an LV1 status value in case of other errors

 */

u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar,

			       u64 start_sector, u64 sectors, int write)

{

	unsigned int region_id = dev->regions[dev->region_idx].id;

	const char *op = write ? "write" : "read";

	int res;



	dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\n",

		__func__, __LINE__, op, sectors, start_sector);



	init_completion(&dev->done);

	res = write ? lv1_storage_write(dev->sbd.dev_id, region_id,

					start_sector, sectors, 0, lpar,

					&dev->tag)

		    : lv1_storage_read(dev->sbd.dev_id, region_id,

				       start_sector, sectors, 0, lpar,

				       &dev->tag);

	if (res) {

		dev_dbg(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,

			__LINE__, op, res);

		return -1;

	}



	wait_for_completion(&dev->done);

	if (dev->lv1_status) {

		dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%lx\n", __func__,

			__LINE__, op, dev->lv1_status);

		return dev->lv1_status;

	}



	dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__,

		op);



	return 0;

}

EXPORT_SYMBOL_GPL(ps3stor_read_write_sectors);





/**

 *	ps3stor_send_command - send a device command to a storage device

 *	@dev: Pointer to a struct ps3_storage_device

 *	@cmd: Command number

 *	@arg1: First command argument

 *	@arg2: Second command argument

 *	@arg3: Third command argument

 *	@arg4: Fourth command argument

 *

 *	Returns 0 for success, -1 in case of failure to submit the command, or

 *	an LV1 status value in case of other errors

 */

u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd, u64 arg1,

			 u64 arg2, u64 arg3, u64 arg4)

{

	int res;



	dev_dbg(&dev->sbd.core, "%s:%u: send device command 0x%lx\n", __func__,

		__LINE__, cmd);



	init_completion(&dev->done);



	res = lv1_storage_send_device_command(dev->sbd.dev_id, cmd, arg1,

					      arg2, arg3, arg4, &dev->tag);

	if (res) {

		dev_err(&dev->sbd.core,

			"%s:%u: send_device_command 0x%lx failed %d\n",

			__func__, __LINE__, cmd, res);

		return -1;

	}



	wait_for_completion(&dev->done);

	if (dev->lv1_status) {

		dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx failed 0x%lx\n",

			__func__, __LINE__, cmd, dev->lv1_status);

		return dev->lv1_status;

	}



	dev_dbg(&dev->sbd.core, "%s:%u: command 0x%lx completed\n", __func__,

		__LINE__, cmd);



	return 0;

}

EXPORT_SYMBOL_GPL(ps3stor_send_command);





MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("PS3 Storage Bus Library");

MODULE_AUTHOR("Sony Corporation");

include/asm-powerpc/ps3stor.h

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Original line number Diff line number Diff line 
/*

 * PS3 Storage Devices

 *

 * Copyright (C) 2007 Sony Computer Entertainment Inc.

 * Copyright 2007 Sony Corp.

 *

 * 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; version 2 of the License.

 *

 * 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.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */



#ifndef _ASM_POWERPC_PS3STOR_H_

#define _ASM_POWERPC_PS3STOR_H_



#include <linux/interrupt.h>



#include <asm/ps3.h>





struct ps3_storage_region {

	unsigned int id;

	u64 start;

	u64 size;

};



struct ps3_storage_device {

	struct ps3_system_bus_device sbd;



	struct ps3_dma_region dma_region;

	unsigned int irq;

	u64 blk_size;



	u64 tag;

	u64 lv1_status;

	struct completion done;



	unsigned long bounce_size;

	void *bounce_buf;

	u64 bounce_lpar;

	dma_addr_t bounce_dma;



	unsigned int num_regions;

	unsigned long accessible_regions;

	unsigned int region_idx;		/* first accessible region */

	struct ps3_storage_region regions[0];	/* Must be last */

};



static inline struct ps3_storage_device *to_ps3_storage_device(struct device *dev)

{

	return container_of(dev, struct ps3_storage_device, sbd.core);

}



extern int ps3stor_setup(struct ps3_storage_device *dev,

			 irq_handler_t handler);

extern void ps3stor_teardown(struct ps3_storage_device *dev);

extern u64 ps3stor_read_write_sectors(struct ps3_storage_device *dev, u64 lpar,

				      u64 start_sector, u64 sectors,

				      int write);

extern u64 ps3stor_send_command(struct ps3_storage_device *dev, u64 cmd,

				u64 arg1, u64 arg2, u64 arg3, u64 arg4);



#endif /* _ASM_POWERPC_PS3STOR_H_ */