diff options
| -rw-r--r-- | drivers/mmc/card/Kconfig | 18 | ||||
| -rw-r--r-- | drivers/mmc/card/block.c | 7 | ||||
| -rw-r--r-- | drivers/mmc/card/queue.c | 191 | ||||
| -rw-r--r-- | drivers/mmc/card/queue.h | 7 | ||||
| -rw-r--r-- | drivers/mmc/core/Makefile | 3 | ||||
| -rw-r--r-- | drivers/mmc/core/bus.c | 253 | ||||
| -rw-r--r-- | drivers/mmc/core/bus.h | 22 | ||||
| -rw-r--r-- | drivers/mmc/core/core.c | 147 | ||||
| -rw-r--r-- | drivers/mmc/core/core.h | 8 | ||||
| -rw-r--r-- | drivers/mmc/core/host.c | 156 | ||||
| -rw-r--r-- | drivers/mmc/core/host.h | 18 | ||||
| -rw-r--r-- | drivers/mmc/core/mmc.c | 65 | ||||
| -rw-r--r-- | drivers/mmc/core/sd.c | 63 | ||||
| -rw-r--r-- | drivers/mmc/core/sysfs.c | 347 | ||||
| -rw-r--r-- | drivers/mmc/core/sysfs.h | 19 | ||||
| -rw-r--r-- | drivers/mmc/host/at91_mci.c | 217 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 10 | ||||
| -rw-r--r-- | include/linux/pci_ids.h | 1 |
18 files changed, 980 insertions, 572 deletions
diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig index 9320a8c73239..a49cb9737cd8 100644 --- a/drivers/mmc/card/Kconfig +++ b/drivers/mmc/card/Kconfig @@ -14,3 +14,21 @@ config MMC_BLOCK mount the filesystem. Almost everyone wishing MMC support should say Y or M here. +config MMC_BLOCK_BOUNCE + bool "Use bounce buffer for simple hosts" + depends on MMC_BLOCK + default y + help + SD/MMC is a high latency protocol where it is crucial to + send large requests in order to get high performance. Many + controllers, however, are restricted to continuous memory + (i.e. they can't do scatter-gather), something the kernel + rarely can provide. + + Say Y here to help these restricted hosts by bouncing + requests back and forth from a large buffer. You will get + a big performance gain at the cost of up to 64 KiB of + physical memory. + + If unsure, say Y here. + diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 540ff4bea54c..cbd4b6e3e17c 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -262,7 +262,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) } brq.data.sg = mq->sg; - brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg); + brq.data.sg_len = mmc_queue_map_sg(mq); + + mmc_queue_bounce_pre(mq); if (brq.data.blocks != (req->nr_sectors >> (md->block_bits - 9))) { @@ -279,6 +281,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) } mmc_wait_for_req(card->host, &brq.mrq); + + mmc_queue_bounce_post(mq); + if (brq.cmd.error) { printk(KERN_ERR "%s: error %d sending read/write command\n", req->rq_disk->disk_name, brq.cmd.error); diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index dd97bc798409..4fb2089dc690 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -17,6 +17,8 @@ #include <linux/mmc/host.h> #include "queue.h" +#define MMC_QUEUE_BOUNCESZ 65536 + #define MMC_QUEUE_SUSPENDED (1 << 0) /* @@ -118,6 +120,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock struct mmc_host *host = card->host; u64 limit = BLK_BOUNCE_HIGH; int ret; + unsigned int bouncesz; if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask) limit = *mmc_dev(host)->dma_mask; @@ -127,21 +130,61 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock if (!mq->queue) return -ENOMEM; - blk_queue_prep_rq(mq->queue, mmc_prep_request); - blk_queue_bounce_limit(mq->queue, limit); - blk_queue_max_sectors(mq->queue, host->max_req_size / 512); - blk_queue_max_phys_segments(mq->queue, host->max_phys_segs); - blk_queue_max_hw_segments(mq->queue, host->max_hw_segs); - blk_queue_max_segment_size(mq->queue, host->max_seg_size); - mq->queue->queuedata = mq; mq->req = NULL; - mq->sg = kmalloc(sizeof(struct scatterlist) * host->max_phys_segs, - GFP_KERNEL); - if (!mq->sg) { - ret = -ENOMEM; - goto cleanup_queue; + blk_queue_prep_rq(mq->queue, mmc_prep_request); + +#ifdef CONFIG_MMC_BLOCK_BOUNCE + if (host->max_hw_segs == 1) { + bouncesz = MMC_QUEUE_BOUNCESZ; + + if (bouncesz > host->max_req_size) + bouncesz = host->max_req_size; + if (bouncesz > host->max_seg_size) + bouncesz = host->max_seg_size; + + mq->bounce_buf = kmalloc(bouncesz, GFP_KERNEL); + if (!mq->bounce_buf) { + printk(KERN_WARNING "%s: unable to allocate " + "bounce buffer\n", mmc_card_name(card)); + } else { + blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH); + blk_queue_max_sectors(mq->queue, bouncesz / 512); + blk_queue_max_phys_segments(mq->queue, bouncesz / 512); + blk_queue_max_hw_segments(mq->queue, bouncesz / 512); + blk_queue_max_segment_size(mq->queue, bouncesz); + + mq->sg = kmalloc(sizeof(struct scatterlist), + GFP_KERNEL); + if (!mq->sg) { + ret = -ENOMEM; + goto free_bounce_buf; + } + + mq->bounce_sg = kmalloc(sizeof(struct scatterlist) * + bouncesz / 512, GFP_KERNEL); + if (!mq->bounce_sg) { + ret = -ENOMEM; + goto free_sg; + } + } + } +#endif + + if (!mq->bounce_buf) { + blk_queue_bounce_limit(mq->queue, limit); + blk_queue_max_sectors(mq->queue, host->max_req_size / 512); + blk_queue_max_phys_segments(mq->queue, host->max_phys_segs); + blk_queue_max_hw_segments(mq->queue, host->max_hw_segs); + blk_queue_max_segment_size(mq->queue, host->max_seg_size); + + mq->sg = kmalloc(sizeof(struct scatterlist) * + host->max_phys_segs, GFP_KERNEL); + if (!mq->sg) { + ret = -ENOMEM; + goto cleanup_queue; + } } init_MUTEX(&mq->thread_sem); @@ -149,14 +192,21 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, spinlock_t *lock mq->thread = kthread_run(mmc_queue_thread, mq, "mmcqd"); if (IS_ERR(mq->thread)) { ret = PTR_ERR(mq->thread); - goto free_sg; + goto free_bounce_sg; } return 0; - + free_bounce_sg: + if (mq->bounce_sg) + kfree(mq->bounce_sg); + mq->bounce_sg = NULL; free_sg: kfree(mq->sg); mq->sg = NULL; + free_bounce_buf: + if (mq->bounce_buf) + kfree(mq->bounce_buf); + mq->bounce_buf = NULL; cleanup_queue: blk_cleanup_queue(mq->queue); return ret; @@ -178,9 +228,17 @@ void mmc_cleanup_queue(struct mmc_queue *mq) /* Then terminate our worker thread */ kthread_stop(mq->thread); + if (mq->bounce_sg) + kfree(mq->bounce_sg); + mq->bounce_sg = NULL; + kfree(mq->sg); mq->sg = NULL; + if (mq->bounce_buf) + kfree(mq->bounce_buf); + mq->bounce_buf = NULL; + blk_cleanup_queue(mq->queue); mq->card = NULL; @@ -231,3 +289,108 @@ void mmc_queue_resume(struct mmc_queue *mq) } } +static void copy_sg(struct scatterlist *dst, unsigned int dst_len, + struct scatterlist *src, unsigned int src_len) +{ + unsigned int chunk; + char *dst_buf, *src_buf; + unsigned int dst_size, src_size; + + dst_buf = NULL; + src_buf = NULL; + dst_size = 0; + src_size = 0; + + while (src_len) { + BUG_ON(dst_len == 0); + + if (dst_size == 0) { + dst_buf = page_address(dst->page) + dst->offset; + dst_size = dst->length; + } + + if (src_size == 0) { + src_buf = page_address(src->page) + src->offset; + src_size = src->length; + } + + chunk = min(dst_size, src_size); + + memcpy(dst_buf, src_buf, chunk); + + dst_buf += chunk; + src_buf += chunk; + dst_size -= chunk; + src_size -= chunk; + + if (dst_size == 0) { + dst++; + dst_len--; + } + + if (src_size == 0) { + src++; + src_len--; + } + } +} + +unsigned int mmc_queue_map_sg(struct mmc_queue *mq) +{ + unsigned int sg_len; + + if (!mq->bounce_buf) + return blk_rq_map_sg(mq->queue, mq->req, mq->sg); + + BUG_ON(!mq->bounce_sg); + + sg_len = blk_rq_map_sg(mq->queue, mq->req, mq->bounce_sg); + + mq->bounce_sg_len = sg_len; + + /* + * Shortcut in the event we only get a single entry. + */ + if (sg_len == 1) { + memcpy(mq->sg, mq->bounce_sg, sizeof(struct scatterlist)); + return 1; + } + + mq->sg[0].page = virt_to_page(mq->bounce_buf); + mq->sg[0].offset = offset_in_page(mq->bounce_buf); + mq->sg[0].length = 0; + + while (sg_len) { + mq->sg[0].length += mq->bounce_sg[sg_len - 1].length; + sg_len--; + } + + return 1; +} + +void mmc_queue_bounce_pre(struct mmc_queue *mq) +{ + if (!mq->bounce_buf) + return; + + if (mq->bounce_sg_len == 1) + return; + if (rq_data_dir(mq->req) != WRITE) + return; + + copy_sg(mq->sg, 1, mq->bounce_sg, mq->bounce_sg_len); +} + +void mmc_queue_bounce_post(struct mmc_queue *mq) +{ + if (!mq->bounce_buf) + return; + + if (mq->bounce_sg_len == 1) + return; + if (rq_data_dir(mq->req) != READ) + return; + + copy_sg(mq->bounce_sg, mq->bounce_sg_len, mq->sg, 1); +} + diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h index 1590b3f3f1f7..64e66e0d4994 100644 --- a/drivers/mmc/card/queue.h +++ b/drivers/mmc/card/queue.h @@ -14,6 +14,9 @@ struct mmc_queue { void *data; struct request_queue *queue; struct scatterlist *sg; + char *bounce_buf; + struct scatterlist *bounce_sg; + unsigned int bounce_sg_len; }; extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *); @@ -21,4 +24,8 @@ extern void mmc_cleanup_queue(struct mmc_queue *); extern void mmc_queue_suspend(struct mmc_queue *); extern void mmc_queue_resume(struct mmc_queue *); +extern unsigned int mmc_queue_map_sg(struct mmc_queue *); +extern void mmc_queue_bounce_pre(struct mmc_queue *); +extern void mmc_queue_bounce_post(struct mmc_queue *); + #endif diff --git a/drivers/mmc/core/Makefile b/drivers/mmc/core/Makefile index 1075b02ae754..3fdd08c7f143 100644 --- a/drivers/mmc/core/Makefile +++ b/drivers/mmc/core/Makefile @@ -7,5 +7,6 @@ ifeq ($(CONFIG_MMC_DEBUG),y) endif obj-$(CONFIG_MMC) += mmc_core.o -mmc_core-y := core.o sysfs.o mmc.o mmc_ops.o sd.o sd_ops.o +mmc_core-y := core.o sysfs.o bus.o host.o \ + mmc.o mmc_ops.o sd.o sd_ops.o diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c new file mode 100644 index 000000000000..348b566bf4fd --- /dev/null +++ b/drivers/mmc/core/bus.c @@ -0,0 +1,253 @@ +/* + * linux/drivers/mmc/core/bus.c + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright (C) 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * MMC card bus driver model + */ + +#include <linux/device.h> +#include <linux/err.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> + +#include "sysfs.h" +#include "core.h" +#include "bus.h" + +#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev) +#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv) + +static ssize_t mmc_type_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + + switch (card->type) { + case MMC_TYPE_MMC: + return sprintf(buf, "MMC\n"); + case MMC_TYPE_SD: + return sprintf(buf, "SD\n"); + default: + return -EFAULT; + } +} + +static struct device_attribute mmc_dev_attrs[] = { + MMC_ATTR_RO(type), + __ATTR_NULL, +}; + +/* + * This currently matches any MMC driver to any MMC card - drivers + * themselves make the decision whether to drive this card in their + * probe method. + */ +static int mmc_bus_match(struct device *dev, struct device_driver *drv) +{ + return 1; +} + +static int +mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf, + int buf_size) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + int retval = 0, i = 0, length = 0; + +#define add_env(fmt,val) do { \ + retval = add_uevent_var(envp, num_envp, &i, \ + buf, buf_size, &length, \ + fmt, val); \ + if (retval) \ + return retval; \ +} while (0); + + switch (card->type) { + case MMC_TYPE_MMC: + add_env("MMC_TYPE=%s", "MMC"); + break; + case MMC_TYPE_SD: + add_env("MMC_TYPE=%s", "SD"); + break; + } + + add_env("MMC_NAME=%s", mmc_card_name(card)); + +#undef add_env + + envp[i] = NULL; + + return 0; +} + +static int mmc_bus_probe(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = dev_to_mmc_card(dev); + + return drv->probe(card); +} + +static int mmc_bus_remove(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = dev_to_mmc_card(dev); + + drv->remove(card); + + return 0; +} + +static int mmc_bus_suspend(struct device *dev, pm_message_t state) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = dev_to_mmc_card(dev); + int ret = 0; + + if (dev->driver && drv->suspend) + ret = drv->suspend(card, state); + return ret; +} + +static int mmc_bus_resume(struct device *dev) +{ + struct mmc_driver *drv = to_mmc_driver(dev->driver); + struct mmc_card *card = dev_to_mmc_card(dev); + int ret = 0; + + if (dev->driver && drv->resume) + ret = drv->resume(card); + return ret; +} + +static struct bus_type mmc_bus_type = { + .name = "mmc", + .dev_attrs = mmc_dev_attrs, + .match = mmc_bus_match, + .uevent = mmc_bus_uevent, + .probe = mmc_bus_probe, + .remove = mmc_bus_remove, + .suspend = mmc_bus_suspend, + .resume = mmc_bus_resume, +}; + +int mmc_register_bus(void) +{ + return bus_register(&mmc_bus_type); +} + +void mmc_unregister_bus(void) +{ + bus_unregister(&mmc_bus_type); +} + +/** + * mmc_register_driver - register a media driver + * @drv: MMC media driver + */ +int mmc_register_driver(struct mmc_driver *drv) +{ + drv->drv.bus = &mmc_bus_type; + return driver_register(&drv->drv); +} + +EXPORT_SYMBOL(mmc_register_driver); + +/** + * mmc_unregister_driver - unregister a media driver + * @drv: MMC media driver + */ +void mmc_unregister_driver(struct mmc_driver *drv) +{ + drv->drv.bus = &mmc_bus_type; + driver_unregister(&drv->drv); +} + +EXPORT_SYMBOL(mmc_unregister_driver); + +static void mmc_release_card(struct device *dev) +{ + struct mmc_card *card = dev_to_mmc_card(dev); + + kfree(card); +} + +/* + * Allocate and initialise a new MMC card structure. + */ +struct mmc_card *mmc_alloc_card(struct mmc_host *host) +{ + struct mmc_card *card; + + card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); + if (!card) + return ERR_PTR(-ENOMEM); + + memset(card, 0, sizeof(struct mmc_card)); + + card->host = host; + + device_initialize(&card->dev); + + card->dev.parent = mmc_classdev(host); + card->dev.bus = &mmc_bus_type; + card->dev.release = mmc_release_card; + + return card; +} + +/* + * Register a new MMC card with the driver model. + */ +int mmc_add_card(struct mmc_card *card) +{ + int ret; + + snprintf(card->dev.bus_id, sizeof(card->dev.bus_id), + "%s:%04x", mmc_hostname(card->host), card->rca); + + card->dev.uevent_suppress = 1; + + ret = device_add(&card->dev); + if (ret) + return ret; + + if (card->host->bus_ops->sysfs_add) { + ret = card->host->bus_ops->sysfs_add(card->host, card); + if (ret) { + device_del(&card->dev); + return ret; + } + } + + card->dev.uevent_suppress = 0; + + kobject_uevent(&card->dev.kobj, KOBJ_ADD); + + mmc_card_set_present(card); + + return 0; +} + +/* + * Unregister a new MMC card with the driver model, and + * (eventually) free it. + */ +void mmc_remove_card(struct mmc_card *card) +{ + if (mmc_card_present(card)) { + if (card->host->bus_ops->sysfs_remove) + card->host->bus_ops->sysfs_remove(card->host, card); + device_del(&card->dev); + } + + put_device(&card->dev); +} + diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h new file mode 100644 index 000000000000..4f35431116a8 --- /dev/null +++ b/drivers/mmc/core/bus.h @@ -0,0 +1,22 @@ +/* + * linux/drivers/mmc/core/bus.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _MMC_CORE_BUS_H +#define _MMC_CORE_BUS_H + +struct mmc_card *mmc_alloc_card(struct mmc_host *host); +int mmc_add_card(struct mmc_card *card); +void mmc_remove_card(struct mmc_card *card); + +int mmc_register_bus(void); +void mmc_unregister_bus(void); + +#endif + diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 7385acfa1dd9..b5d8a6d90cca 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -27,7 +27,8 @@ #include <linux/mmc/sd.h> #include "core.h" -#include "sysfs.h" +#include "bus.h" +#include "host.h" #include "mmc_ops.h" #include "sd_ops.h" @@ -35,6 +36,25 @@ extern int mmc_attach_mmc(struct mmc_host *host, u32 ocr); extern int mmc_attach_sd(struct mmc_host *host, u32 ocr); +static struct workqueue_struct *workqueue; + +/* + * Internal function. Schedule delayed work in the MMC work queue. + */ +static int mmc_schedule_delayed_work(struct delayed_work *work, + unsigned long delay) +{ + return queue_delayed_work(workqueue, work, delay); +} + +/* + * Internal function. Flush all scheduled work from the MMC work queue. + */ +static void mmc_flush_scheduled_work(void) +{ + flush_workqueue(workqueue); +} + /** * mmc_request_done - finish processing an MMC request * @host: MMC host which completed request @@ -369,22 +389,6 @@ void mmc_set_timing(struct mmc_host *host, unsigned int timing) } /* - * Allocate a new MMC card - */ -struct mmc_card *mmc_alloc_card(struct mmc_host *host) -{ - struct mmc_card *card; - - card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL); - if (!card) - return ERR_PTR(-ENOMEM); - - mmc_init_card(card, host); - - return card; -} - -/* * Apply power to the MMC stack. This is a two-stage process. * First, we enable power to the card without the clock running. * We then wait a bit for the power to stabilise. Finally, @@ -512,7 +516,7 @@ void mmc_detect_change(struct mmc_host *host, unsigned long delay) EXPORT_SYMBOL(mmc_detect_change); -static void mmc_rescan(struct work_struct *work) +void mmc_rescan(struct work_struct *work) { struct mmc_host *host = container_of(work, struct mmc_host, detect.work); @@ -561,69 +565,13 @@ static void mmc_rescan(struct work_struct *work) } } - -/** - * mmc_alloc_host - initialise the per-host structure. - * @extra: sizeof private data structure - * @dev: pointer to host device model structure - * - * Initialise the per-host structure. - */ -struct mmc_host *mmc_alloc_host(int extra, struct device *dev) +void mmc_start_host(struct mmc_host *host) { - struct mmc_host *host; - - host = mmc_alloc_host_sysfs(extra, dev); - if (host) { - spin_lock_init(&host->lock); - init_waitqueue_head(&host->wq); - INIT_DELAYED_WORK(&host->detect, mmc_rescan); - - /* - * By default, hosts do not support SGIO or large requests. - * They have to set these according to their abilities. - */ - host->max_hw_segs = 1; - host->max_phys_segs = 1; - host->max_seg_size = PAGE_CACHE_SIZE; - - host->max_req_size = PAGE_CACHE_SIZE; - host->max_blk_size = 512; - host->max_blk_count = PAGE_CACHE_SIZE / 512; - } - - return host; -} - -EXPORT_SYMBOL(mmc_alloc_host); - -/** - * mmc_add_host - initialise host hardware - * @host: mmc host - */ -int mmc_add_host(struct mmc_host *host) -{ - int ret; - - ret = mmc_add_host_sysfs(host); - if (ret == 0) { - mmc_power_off(host); - mmc_detect_change(host, 0); - } - - return ret; + mmc_power_off(host); + mmc_detect_change(host, 0); } -EXPORT_SYMBOL(mmc_add_host); - -/** - * mmc_remove_host - remove host hardware - * @host: mmc host - * - * Unregister and remove all cards associated with this host, - * and power down the MMC bus. - */ -void mmc_remove_host(struct mmc_host *host) +void mmc_stop_host(struct mmc_host *host) { #ifdef CONFIG_MMC_DEBUG unsigned long flags; @@ -648,24 +596,8 @@ void mmc_remove_host(struct mmc_host *host) BUG_ON(host->card); mmc_power_off(host); - mmc_remove_host_sysfs(host); } -EXPORT_SYMBOL(mmc_remove_host); - -/** - * mmc_free_host - free the host structure - * @host: mmc host - * - * Free the host once all references to it have been dropped. - */ -void mmc_free_host(struct mmc_host *host) -{ - mmc_free_host_sysfs(host); -} - -EXPORT_SYMBOL(mmc_free_host); - #ifdef CONFIG_PM /** @@ -726,4 +658,31 @@ EXPORT_SYMBOL(mmc_resume_host); #endif +static int __init mmc_init(void) +{ + int ret; + + workqueue = create_singlethread_workqueue("kmmcd"); + if (!workqueue) + return -ENOMEM; + + ret = mmc_register_bus(); + if (ret == 0) { + ret = mmc_register_host_class(); + if (ret) + mmc_unregister_bus(); + } + return ret; +} + +static void __exit mmc_exit(void) +{ + mmc_unregister_host_class(); + mmc_unregister_bus(); + destroy_workqueue(workqueue); +} + +module_init(mmc_init); +module_exit(mmc_exit); + MODULE_LICENSE("GPL"); diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 177264d090ac..ae006b30dd86 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -18,6 +18,8 @@ struct mmc_bus_ops { void (*remove)(struct mmc_host *); void (*detect)(struct mmc_host *); + int (*sysfs_add)(struct mmc_host *, struct mmc_card *card); + void (*sysfs_remove)(struct mmc_host *, struct mmc_card *card); void (*suspend)(struct mmc_host *); void (*resume)(struct mmc_host *); }; @@ -54,8 +56,6 @@ void mmc_set_bus_width(struct mmc_host *host, unsigned int width); u32 mmc_select_voltage(struct mmc_host *host, u32 ocr); void mmc_set_timing(struct mmc_host *host, unsigned int timing); -struct mmc_card *mmc_alloc_card(struct mmc_host *host); - static inline void mmc_delay(unsigned int ms) { if (ms < 1000 / HZ) { @@ -66,5 +66,9 @@ static inline void mmc_delay(unsigned int ms) } } +void mmc_rescan(struct work_struct *work); +void mmc_start_host(struct mmc_host *host); +void mmc_stop_host(struct mmc_host *host); + #endif diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c new file mode 100644 index 000000000000..1433d95c40bb --- /dev/null +++ b/drivers/mmc/core/host.c @@ -0,0 +1,156 @@ +/* + * linux/drivers/mmc/core/host.c + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright (C) 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * MMC host class device management + */ + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/idr.h> +#include <linux/pagemap.h> + +#include <linux/mmc/host.h> + +#include "core.h" +#include "host.h" + +#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev) + +static void mmc_host_classdev_release(struct device *dev) +{ + struct mmc_host *host = cls_dev_to_mmc_host(dev); + kfree(host); +} + +static struct class mmc_host_class = { + .name = "mmc_host", + .dev_release = mmc_host_classdev_release, +}; + +int mmc_register_host_class(void) +{ + return class_register(&mmc_host_class); +} + +void mmc_unregister_host_class(void) +{ + class_unregister(&mmc_host_class); +} + +static DEFINE_IDR(mmc_host_idr); +static DEFINE_SPINLOCK(mmc_host_lock); + +/** + * mmc_alloc_host - initialise the per-host structure. + * @extra: sizeof private data structure + * @dev: pointer to host device model structure + * + * Initialise the per-host structure. + */ +struct mmc_host *mmc_alloc_host(int extra, struct device *dev) +{ + struct mmc_host *host; + + host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL); + if (!host) + return NULL; + + memset(host, 0, sizeof(struct mmc_host) + extra); + + host->parent = dev; + host->class_dev.parent = dev; + host->class_dev.class = &mmc_host_class; + device_initialize(&host->class_dev); + + spin_lock_init(&host->lock); + init_waitqueue_head(&host->wq); + INIT_DELAYED_WORK(&host->detect, mmc_rescan); + + /* + * By default, hosts do not support SGIO or large requests. + * They have to set these according to their abilities. + */ + host->max_hw_segs = 1; + host->max_phys_segs = 1; + host->max_seg_size = PAGE_CACHE_SIZE; + + host->max_req_size = PAGE_CACHE_SIZE; + host->max_blk_size = 512; + host->max_blk_count = PAGE_CACHE_SIZE / 512; + + return host; +} + +EXPORT_SYMBOL(mmc_alloc_host); + +/** + * mmc_add_host - initialise host hardware + * @host: mmc host + */ +int mmc_add_host(struct mmc_host *host) +{ + int err; + + if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL)) + return -ENOMEM; + + spin_lock(&mmc_host_lock); + err = idr_get_new(&mmc_host_idr, host, &host->index); + spin_unlock(&mmc_host_lock); + if (err) + return err; + + snprintf(host->class_dev.bus_id, BUS_ID_SIZE, + "mmc%d", host->index); + + err = device_add(&host->class_dev); + if (err) + return err; + + mmc_start_host(host); + + return 0; +} + +EXPORT_SYMBOL(mmc_add_host); + +/** + * mmc_remove_host - remove host hardware + * @host: mmc host + * + * Unregister and remove all cards associated with this host, + * and power down the MMC bus. + */ +void mmc_remove_host(struct mmc_host *host) +{ + mmc_stop_host(host); + + device_del(&host->class_dev); + + spin_lock(&mmc_host_lock); + idr_remove(&mmc_host_idr, host->index); + spin_unlock(&mmc_host_lock); +} + +EXPORT_SYMBOL(mmc_remove_host); + +/** + * mmc_free_host - free the host structure + * @host: mmc host + * + * Free the host once all references to it have been dropped. + */ +void mmc_free_host(struct mmc_host *host) +{ + put_device(&host->class_dev); +} + +EXPORT_SYMBOL(mmc_free_host); + diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h new file mode 100644 index 000000000000..c2dc3d2d9f9a --- /dev/null +++ b/drivers/mmc/core/host.h @@ -0,0 +1,18 @@ +/* + * linux/drivers/mmc/core/host.h + * + * Copyright (C) 2003 Russell King, All Rights Reserved. + * Copyright 2007 Pierre Ossman + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#ifndef _MMC_CORE_HOST_H +#define _MMC_CORE_HOST_H + +int mmc_register_host_class(void); +void mmc_unregister_host_class(void); + +#endif + diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 42cc2867ed7d..66f85bfa8dbb 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -18,6 +18,7 @@ #include "core.h" #include "sysfs.h" +#include "bus.h" #include "mmc_ops.h" static const unsigned int tran_exp[] = { @@ -236,7 +237,7 @@ out: * In the case of a resume, "curcard" will contain the card * we're trying to reinitialise. */ -static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, +static int mmc_init_card(struct mmc_host *host, u32 ocr, struct mmc_card *oldcard) { struct mmc_card *card; @@ -413,8 +414,7 @@ static void mmc_detect(struct mmc_host *host) mmc_release_host(host); if (err != MMC_ERR_NONE) { - mmc_remove_card(host->card); - host->card = NULL; + mmc_remove(host); mmc_claim_host(host); mmc_detach_bus(host); @@ -422,6 +422,53 @@ static void mmc_detect(struct mmc_host *host) } } +MMC_ATTR_FN(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1], + card->raw_cid[2], card->raw_cid[3]); +MMC_ATTR_FN(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], + card->raw_csd[2], card->raw_csd[3]); +MMC_ATTR_FN(date, "%02d/%04d\n", card->cid.month, card->cid.year); +MMC_ATTR_FN(fwrev, "0x%x\n", card->cid.fwrev); +MMC_ATTR_FN(hwrev, "0x%x\n", card->cid.hwrev); +MMC_ATTR_FN(manfid, "0x%06x\n", card->cid.manfid); +MMC_ATTR_FN(name, "%s\n", card->cid.prod_name); +MMC_ATTR_FN(oemid, "0x%04x\n", card->cid.oemid); +MMC_ATTR_FN(serial, "0x%08x\n", card->cid.serial); + +static struct device_attribute mmc_dev_attrs[] = { + MMC_ATTR_RO(cid), + MMC_ATTR_RO(csd), + MMC_ATTR_RO(date), + MMC_ATTR_RO(fwrev), + MMC_ATTR_RO(hwrev), + MMC_ATTR_RO(manfid), + MMC_ATTR_RO(name), + MMC_ATTR_RO(oemid), + MMC_ATTR_RO(serial), + __ATTR_NULL, +}; + +/* + * Adds sysfs entries as relevant. + */ +static int mmc_sysfs_add(struct mmc_host *host, struct mmc_card *card) +{ + int ret; + + ret = mmc_add_attrs(card, mmc_dev_attrs); + if (ret < 0) + return ret; + + return 0; +} + +/* + * Removes the sysfs entries added by mmc_sysfs_add(). + */ +static void mmc_sysfs_remove(struct mmc_host *host, struct mmc_card *card) +{ |