Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=80071802cb9c622dbd44bc6ba292f0683891ef44
Commit:     80071802cb9c622dbd44bc6ba292f0683891ef44
Parent:     32d7331852a07d1f94c6d1b817c7c45648aa0fe7
Author:     Geert Uytterhoeven <[EMAIL PROTECTED]>
AuthorDate: Fri Jun 22 00:14:21 2007 +1000
Committer:  Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Thu Jun 28 19:19:20 2007 +1000

    [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: Geert Uytterhoeven <[EMAIL PROTECTED]>
    Signed-off-by: Geoff Levand <[EMAIL PROTECTED]>
    Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
 arch/powerpc/platforms/ps3/Kconfig |    4 +
 drivers/ps3/Makefile               |    1 +
 drivers/ps3/ps3stor_lib.c          |  302 ++++++++++++++++++++++++++++++++++++
 include/asm-powerpc/ps3stor.h      |   71 +++++++++
 4 files changed, 378 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/platforms/ps3/Kconfig 
b/arch/powerpc/platforms/ps3/Kconfig
index 9c5a15d..a05079b 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -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
diff --git a/drivers/ps3/Makefile b/drivers/ps3/Makefile
index b8c5547..746031d 100644
--- a/drivers/ps3/Makefile
+++ b/drivers/ps3/Makefile
@@ -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
diff --git a/drivers/ps3/ps3stor_lib.c b/drivers/ps3/ps3stor_lib.c
new file mode 100644
index 0000000..3a9824e
--- /dev/null
+++ b/drivers/ps3/ps3stor_lib.c
@@ -0,0 +1,302 @@
+/*
+ * 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");
diff --git a/include/asm-powerpc/ps3stor.h b/include/asm-powerpc/ps3stor.h
new file mode 100644
index 0000000..6fcaf71
--- /dev/null
+++ b/include/asm-powerpc/ps3stor.h
@@ -0,0 +1,71 @@
+/*
+ * 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_ */
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