[patch 3/6] ps3: Storage device registration routines.

Geert Uytterhoeven
2007-07-04T13:26:18Z

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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>
---
v2:
- use msleep() instead of schedule_timeout()

arch/powerpc/platforms/ps3/device-init.c | 286 +++++++++++++++++++++++++++++++
1 files changed, 286 insertions(+)

--- a/arch/powerpc/platforms/ps3/device-init.c
+++ b/arch/powerpc/platforms/ps3/device-init.c
@@ -26,6 +26,7 @@

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

#include "platform.h"

@@ -237,6 +238,262 @@ static int __init ps3_setup_vuart_device
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;
@@ -356,6 +613,35 @@ static int ps3_register_repository_devic
__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__,

--
With kind regards,

Geert Uytterhoeven
Software Architect

Sony Network and Software Technology Center Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone: +32 (0)2 700 8453
Fax: +32 (0)2 700 8622
E-mail: Geert.Uytterhoeven@sonycom.com
Internet: http://www.sony-europe.com/

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