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[POWERPC] PS3: Storage device registration routines
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Add support for storage devices to the device probe code.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Geert Uytterhoeven authored and Paul Mackerras committed Jun 28, 2007
1 parent 8007180 commit a5c631b
Showing 1 changed file with 286 additions and 0 deletions.
286 changes: 286 additions & 0 deletions arch/powerpc/platforms/ps3/device-init.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@

#include <asm/firmware.h>
#include <asm/lv1call.h>
#include <asm/ps3stor.h>

#include "platform.h"

Expand Down Expand Up @@ -237,6 +238,262 @@ static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
return result;
}

static int ps3stor_wait_for_completion(u64 dev_id, u64 tag,
unsigned int timeout)
{
int result = -1;
unsigned int retries = 0;
u64 status;

for (retries = 0; retries < timeout; retries++) {
result = lv1_storage_check_async_status(dev_id, tag, &status);
if (!result)
break;

msleep(1);
}

if (result)
pr_debug("%s:%u: check_async_status: %s, status %lx\n",
__func__, __LINE__, ps3_result(result), status);

return result;
}

/**
* ps3_storage_wait_for_device - Wait for a storage device to become ready.
* @repo: The repository device to wait for.
*
* Uses the hypervisor's storage device notification mechanism to wait until
* a storage device is ready. The device notification mechanism uses a
* psuedo device (id = -1) to asynchronously notify the guest when storage
* devices become ready. The notification device has a block size of 512
* bytes.
*/

static int ps3_storage_wait_for_device(const struct ps3_repository_device *repo)
{
int result;
const u64 notification_dev_id = (u64)-1LL;
const unsigned int timeout = HZ;
u64 lpar;
u64 tag;
struct {
u64 operation_code; /* must be zero */
u64 event_mask; /* 1 = device ready */
} *notify_cmd;
struct {
u64 event_type; /* notify_device_ready */
u64 bus_id;
u64 dev_id;
u64 dev_type;
u64 dev_port;
} *notify_event;
enum {
notify_device_ready = 1
};

pr_debug(" -> %s:%u: bus_id %u, dev_id %u, dev_type %u\n", __func__,
__LINE__, repo->bus_id, repo->dev_id, repo->dev_type);

notify_cmd = kzalloc(512, GFP_KERNEL);
notify_event = (void *)notify_cmd;
if (!notify_cmd)
return -ENOMEM;

lpar = ps3_mm_phys_to_lpar(__pa(notify_cmd));

result = lv1_open_device(repo->bus_id, notification_dev_id, 0);
if (result) {
printk(KERN_ERR "%s:%u: lv1_open_device %s\n", __func__,
__LINE__, ps3_result(result));
result = -ENODEV;
goto fail_free;
}

/* Setup and write the request for device notification. */

notify_cmd->operation_code = 0; /* must be zero */
notify_cmd->event_mask = 0x01; /* device ready */

result = lv1_storage_write(notification_dev_id, 0, 0, 1, 0, lpar,
&tag);
if (result) {
printk(KERN_ERR "%s:%u: write failed %s\n", __func__, __LINE__,
ps3_result(result));
result = -ENODEV;
goto fail_close;
}

/* Wait for the write completion */

result = ps3stor_wait_for_completion(notification_dev_id, tag,
timeout);
if (result) {
printk(KERN_ERR "%s:%u: write not completed %s\n", __func__,
__LINE__, ps3_result(result));
result = -ENODEV;
goto fail_close;
}

/* Loop here processing the requested notification events. */

result = -ENODEV;
while (1) {
memset(notify_event, 0, sizeof(*notify_event));

result = lv1_storage_read(notification_dev_id, 0, 0, 1, 0,
lpar, &tag);
if (result) {
printk(KERN_ERR "%s:%u: write failed %s\n", __func__,
__LINE__, ps3_result(result));
break;
}

result = ps3stor_wait_for_completion(notification_dev_id, tag,
timeout);
if (result) {
printk(KERN_ERR "%s:%u: read not completed %s\n",
__func__, __LINE__, ps3_result(result));
break;
}

if (notify_event->event_type != notify_device_ready ||
notify_event->bus_id != repo->bus_id) {
pr_debug("%s:%u: bad notify_event: event %lu, "
"dev_id %lu, dev_type %lu\n",
__func__, __LINE__, notify_event->event_type,
notify_event->dev_id, notify_event->dev_type);
break;
}

if (notify_event->dev_id == repo->dev_id &&
notify_event->dev_type == repo->dev_type) {
pr_debug("%s:%u: device ready: dev_id %u\n", __func__,
__LINE__, repo->dev_id);
result = 0;
break;
}

if (notify_event->dev_id == repo->dev_id &&
notify_event->dev_type == PS3_DEV_TYPE_NOACCESS) {
pr_debug("%s:%u: no access: dev_id %u\n", __func__,
__LINE__, repo->dev_id);
break;
}
}

fail_close:
lv1_close_device(repo->bus_id, notification_dev_id);
fail_free:
kfree(notify_cmd);
pr_debug(" <- %s:%u\n", __func__, __LINE__);
return result;
}

static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
enum ps3_match_id match_id)
{
int result;
struct ps3_storage_device *p;
u64 port, blk_size, num_blocks;
unsigned int num_regions, i;

pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);

result = ps3_repository_read_stor_dev_info(repo->bus_index,
repo->dev_index, &port,
&blk_size, &num_blocks,
&num_regions);
if (result) {
printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
__func__, __LINE__, result);
return -ENODEV;
}

pr_debug("%s:%u: index %u:%u: port %lu blk_size %lu num_blocks %lu "
"num_regions %u\n", __func__, __LINE__, repo->bus_index,
repo->dev_index, port, blk_size, num_blocks, num_regions);

p = kzalloc(sizeof(struct ps3_storage_device) +
num_regions * sizeof(struct ps3_storage_region),
GFP_KERNEL);
if (!p) {
result = -ENOMEM;
goto fail_malloc;
}

p->sbd.match_id = match_id;
p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
p->sbd.bus_id = repo->bus_id;
p->sbd.dev_id = repo->dev_id;
p->sbd.d_region = &p->dma_region;
p->blk_size = blk_size;
p->num_regions = num_regions;

result = ps3_repository_find_interrupt(repo,
PS3_INTERRUPT_TYPE_EVENT_PORT,
&p->sbd.interrupt_id);
if (result) {
printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
__LINE__, result);
result = -ENODEV;
goto fail_find_interrupt;
}

/* FIXME: Arrange to only do this on a 'cold' boot */

result = ps3_storage_wait_for_device(repo);
if (result) {
printk(KERN_ERR "%s:%u: storage_notification failed %d\n",
__func__, __LINE__, result);
result = -ENODEV;
goto fail_probe_notification;
}

for (i = 0; i < num_regions; i++) {
unsigned int id;
u64 start, size;

result = ps3_repository_read_stor_dev_region(repo->bus_index,
repo->dev_index,
i, &id, &start,
&size);
if (result) {
printk(KERN_ERR
"%s:%u: read_stor_dev_region failed %d\n",
__func__, __LINE__, result);
result = -ENODEV;
goto fail_read_region;
}
pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
__func__, __LINE__, i, id, start, size);

p->regions[i].id = id;
p->regions[i].start = start;
p->regions[i].size = size;
}

result = ps3_system_bus_device_register(&p->sbd);
if (result) {
pr_debug("%s:%u ps3_system_bus_device_register failed\n",
__func__, __LINE__);
goto fail_device_register;
}

pr_debug(" <- %s:%u\n", __func__, __LINE__);
return 0;

fail_device_register:
fail_read_region:
fail_probe_notification:
fail_find_interrupt:
kfree(p);
fail_malloc:
pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
return result;
}

static int __init ps3_register_vuart_devices(void)
{
int result;
Expand Down Expand Up @@ -356,6 +613,35 @@ static int ps3_register_repository_device(
__func__, __LINE__);
}
break;
case PS3_DEV_TYPE_STOR_DISK:
result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);

/* Some devices are not accessable from the Other OS lpar. */
if (result == -ENODEV) {
result = 0;
pr_debug("%s:%u: not accessable\n", __func__,
__LINE__);
}

if (result)
pr_debug("%s:%u ps3_setup_storage_dev failed\n",
__func__, __LINE__);
break;

case PS3_DEV_TYPE_STOR_ROM:
result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
if (result)
pr_debug("%s:%u ps3_setup_storage_dev failed\n",
__func__, __LINE__);
break;

case PS3_DEV_TYPE_STOR_FLASH:
result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
if (result)
pr_debug("%s:%u ps3_setup_storage_dev failed\n",
__func__, __LINE__);
break;

default:
result = 0;
pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
Expand Down

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