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[POWERPC] PS3: Storage device registration routines
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>
This commit is contained in:
Geert Uytterhoeven
Paul Mackerras
parent
80071802cb
commit
a5c631b174
1 changed files with 286 additions and 0 deletions
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@ -26,6 +26,7 @@
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#include <asm/firmware.h>
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#include <asm/lv1call.h>
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#include <asm/ps3stor.h>
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#include "platform.h"
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@ -237,6 +238,262 @@ static int __init ps3_setup_vuart_device(enum ps3_match_id match_id,
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return result;
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}
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static int ps3stor_wait_for_completion(u64 dev_id, u64 tag,
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unsigned int timeout)
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{
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int result = -1;
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unsigned int retries = 0;
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u64 status;
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for (retries = 0; retries < timeout; retries++) {
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result = lv1_storage_check_async_status(dev_id, tag, &status);
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if (!result)
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break;
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msleep(1);
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}
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if (result)
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pr_debug("%s:%u: check_async_status: %s, status %lx\n",
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__func__, __LINE__, ps3_result(result), status);
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return result;
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}
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/**
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* ps3_storage_wait_for_device - Wait for a storage device to become ready.
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* @repo: The repository device to wait for.
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*
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* Uses the hypervisor's storage device notification mechanism to wait until
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* a storage device is ready. The device notification mechanism uses a
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* psuedo device (id = -1) to asynchronously notify the guest when storage
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* devices become ready. The notification device has a block size of 512
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* bytes.
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*/
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static int ps3_storage_wait_for_device(const struct ps3_repository_device *repo)
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{
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int result;
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const u64 notification_dev_id = (u64)-1LL;
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const unsigned int timeout = HZ;
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u64 lpar;
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u64 tag;
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struct {
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u64 operation_code; /* must be zero */
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u64 event_mask; /* 1 = device ready */
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} *notify_cmd;
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struct {
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u64 event_type; /* notify_device_ready */
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u64 bus_id;
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u64 dev_id;
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u64 dev_type;
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u64 dev_port;
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} *notify_event;
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enum {
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notify_device_ready = 1
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};
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pr_debug(" -> %s:%u: bus_id %u, dev_id %u, dev_type %u\n", __func__,
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__LINE__, repo->bus_id, repo->dev_id, repo->dev_type);
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notify_cmd = kzalloc(512, GFP_KERNEL);
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notify_event = (void *)notify_cmd;
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if (!notify_cmd)
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return -ENOMEM;
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lpar = ps3_mm_phys_to_lpar(__pa(notify_cmd));
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result = lv1_open_device(repo->bus_id, notification_dev_id, 0);
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if (result) {
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printk(KERN_ERR "%s:%u: lv1_open_device %s\n", __func__,
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__LINE__, ps3_result(result));
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result = -ENODEV;
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goto fail_free;
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}
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/* Setup and write the request for device notification. */
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notify_cmd->operation_code = 0; /* must be zero */
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notify_cmd->event_mask = 0x01; /* device ready */
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result = lv1_storage_write(notification_dev_id, 0, 0, 1, 0, lpar,
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&tag);
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if (result) {
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printk(KERN_ERR "%s:%u: write failed %s\n", __func__, __LINE__,
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ps3_result(result));
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result = -ENODEV;
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goto fail_close;
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}
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/* Wait for the write completion */
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result = ps3stor_wait_for_completion(notification_dev_id, tag,
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timeout);
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if (result) {
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printk(KERN_ERR "%s:%u: write not completed %s\n", __func__,
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__LINE__, ps3_result(result));
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result = -ENODEV;
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goto fail_close;
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}
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/* Loop here processing the requested notification events. */
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result = -ENODEV;
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while (1) {
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memset(notify_event, 0, sizeof(*notify_event));
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result = lv1_storage_read(notification_dev_id, 0, 0, 1, 0,
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lpar, &tag);
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if (result) {
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printk(KERN_ERR "%s:%u: write failed %s\n", __func__,
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__LINE__, ps3_result(result));
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break;
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}
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result = ps3stor_wait_for_completion(notification_dev_id, tag,
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timeout);
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if (result) {
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printk(KERN_ERR "%s:%u: read not completed %s\n",
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__func__, __LINE__, ps3_result(result));
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break;
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}
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if (notify_event->event_type != notify_device_ready ||
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notify_event->bus_id != repo->bus_id) {
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pr_debug("%s:%u: bad notify_event: event %lu, "
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"dev_id %lu, dev_type %lu\n",
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__func__, __LINE__, notify_event->event_type,
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notify_event->dev_id, notify_event->dev_type);
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break;
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}
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if (notify_event->dev_id == repo->dev_id &&
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notify_event->dev_type == repo->dev_type) {
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pr_debug("%s:%u: device ready: dev_id %u\n", __func__,
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__LINE__, repo->dev_id);
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result = 0;
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break;
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}
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if (notify_event->dev_id == repo->dev_id &&
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notify_event->dev_type == PS3_DEV_TYPE_NOACCESS) {
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pr_debug("%s:%u: no access: dev_id %u\n", __func__,
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__LINE__, repo->dev_id);
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break;
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}
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}
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fail_close:
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lv1_close_device(repo->bus_id, notification_dev_id);
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fail_free:
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kfree(notify_cmd);
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pr_debug(" <- %s:%u\n", __func__, __LINE__);
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return result;
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}
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static int ps3_setup_storage_dev(const struct ps3_repository_device *repo,
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enum ps3_match_id match_id)
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{
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int result;
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struct ps3_storage_device *p;
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u64 port, blk_size, num_blocks;
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unsigned int num_regions, i;
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pr_debug(" -> %s:%u: match_id %u\n", __func__, __LINE__, match_id);
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result = ps3_repository_read_stor_dev_info(repo->bus_index,
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repo->dev_index, &port,
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&blk_size, &num_blocks,
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&num_regions);
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if (result) {
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printk(KERN_ERR "%s:%u: _read_stor_dev_info failed %d\n",
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__func__, __LINE__, result);
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return -ENODEV;
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}
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pr_debug("%s:%u: index %u:%u: port %lu blk_size %lu num_blocks %lu "
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"num_regions %u\n", __func__, __LINE__, repo->bus_index,
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repo->dev_index, port, blk_size, num_blocks, num_regions);
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p = kzalloc(sizeof(struct ps3_storage_device) +
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num_regions * sizeof(struct ps3_storage_region),
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GFP_KERNEL);
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if (!p) {
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result = -ENOMEM;
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goto fail_malloc;
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}
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p->sbd.match_id = match_id;
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p->sbd.dev_type = PS3_DEVICE_TYPE_SB;
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p->sbd.bus_id = repo->bus_id;
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p->sbd.dev_id = repo->dev_id;
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p->sbd.d_region = &p->dma_region;
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p->blk_size = blk_size;
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p->num_regions = num_regions;
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result = ps3_repository_find_interrupt(repo,
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PS3_INTERRUPT_TYPE_EVENT_PORT,
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&p->sbd.interrupt_id);
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if (result) {
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printk(KERN_ERR "%s:%u: find_interrupt failed %d\n", __func__,
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__LINE__, result);
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result = -ENODEV;
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goto fail_find_interrupt;
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}
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/* FIXME: Arrange to only do this on a 'cold' boot */
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result = ps3_storage_wait_for_device(repo);
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if (result) {
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printk(KERN_ERR "%s:%u: storage_notification failed %d\n",
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__func__, __LINE__, result);
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result = -ENODEV;
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goto fail_probe_notification;
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}
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for (i = 0; i < num_regions; i++) {
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unsigned int id;
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u64 start, size;
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result = ps3_repository_read_stor_dev_region(repo->bus_index,
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repo->dev_index,
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i, &id, &start,
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&size);
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if (result) {
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printk(KERN_ERR
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"%s:%u: read_stor_dev_region failed %d\n",
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__func__, __LINE__, result);
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result = -ENODEV;
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goto fail_read_region;
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}
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pr_debug("%s:%u: region %u: id %u start %lu size %lu\n",
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__func__, __LINE__, i, id, start, size);
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p->regions[i].id = id;
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p->regions[i].start = start;
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p->regions[i].size = size;
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}
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result = ps3_system_bus_device_register(&p->sbd);
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if (result) {
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pr_debug("%s:%u ps3_system_bus_device_register failed\n",
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__func__, __LINE__);
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goto fail_device_register;
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}
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pr_debug(" <- %s:%u\n", __func__, __LINE__);
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return 0;
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fail_device_register:
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fail_read_region:
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fail_probe_notification:
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fail_find_interrupt:
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kfree(p);
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fail_malloc:
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pr_debug(" <- %s:%u: fail.\n", __func__, __LINE__);
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return result;
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}
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static int __init ps3_register_vuart_devices(void)
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{
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int result;
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@ -356,6 +613,35 @@ static int ps3_register_repository_device(
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__func__, __LINE__);
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}
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break;
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case PS3_DEV_TYPE_STOR_DISK:
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result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_DISK);
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/* Some devices are not accessable from the Other OS lpar. */
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if (result == -ENODEV) {
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result = 0;
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pr_debug("%s:%u: not accessable\n", __func__,
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__LINE__);
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}
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if (result)
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pr_debug("%s:%u ps3_setup_storage_dev failed\n",
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__func__, __LINE__);
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break;
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case PS3_DEV_TYPE_STOR_ROM:
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result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_ROM);
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if (result)
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pr_debug("%s:%u ps3_setup_storage_dev failed\n",
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__func__, __LINE__);
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break;
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case PS3_DEV_TYPE_STOR_FLASH:
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result = ps3_setup_storage_dev(repo, PS3_MATCH_ID_STOR_FLASH);
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if (result)
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pr_debug("%s:%u ps3_setup_storage_dev failed\n",
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__func__, __LINE__);
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break;
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default:
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result = 0;
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pr_debug("%s:%u: unsupported dev_type %u\n", __func__, __LINE__,
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