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OpenCloudOS-Kernel/drivers/mmc/card/queue.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#ifndef MMC_QUEUE_H
#define MMC_QUEUE_H
mmc: block: fix the host's claim-release in special request For normal request mmc_blk_issue_rq is called twice with asynchronous transfer(cur and prev). Host's claim and release can be done in each mmc_blk_issue_rq. However, Special request is currently excluded in asynchronous transfer. After special request is finished, if there is no new request, mmc_release_host won't be called in mmc_blk_issue_rq. The problem is founded during mmc_suspend. [<c0541124>] (__schedule+0x0/0x78c) from [<c05419e8>] (schedule+0x38/0x78) [<c05419b0>] (schedule+0x0/0x78) from [<c03a843c>] (__mmc_claim_host+0xac/0x1b4) [<c03a8390>] (__mmc_claim_host+0x0/0x1b4) from [<c03ac98c>] (mmc_suspend+0x28/0x9c) [<c03ac964>] (mmc_suspend+0x0/0x9c) from [<c03aad24>] (mmc_suspend_host+0xb4/0x194) ... Reported-by: Johan Rudholm <jrudholm@gmail.com> Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Tested-by: Johan Rudholm <johan.rudholm@stericsson.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-03-14 14:17:13 +08:00
#define MMC_REQ_SPECIAL_MASK (REQ_DISCARD | REQ_FLUSH)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct request;
struct task_struct;
mmc: block: add member in mmc queue struct to hold request data The way the request data is organized in the mmc queue struct, it only allows processing of one request at a time. This patch adds a new struct to hold mmc queue request data such as sg list, request, blk request and bounce buffers, and updates any functions depending on the mmc queue struct. This prepares for using multiple active requests in one mmc queue. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-10 05:12:36 +08:00
struct mmc_blk_request {
struct mmc_request mrq;
struct mmc_command sbc;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_data data;
};
mmc: support packed write command for eMMC4.5 devices This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Large amounts of data in one transfer rather than several data of small size are effective for eMMC write internally. As a result, packed command help write throughput be improved. The following tables show the results of packed write. Type A: test none | packed iozone 25.8 | 31 tiotest 27.6 | 31.2 lmdd 31.2 | 35.4 Type B: test none | packed iozone 44.1 | 51.1 tiotest 47.9 | 52.5 lmdd 51.6 | 59.2 Type C: test none | packed iozone 19.5 | 32 tiotest 19.9 | 34.5 lmdd 22.8 | 40.7 Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-06 16:02:46 +08:00
enum mmc_packed_type {
MMC_PACKED_NONE = 0,
MMC_PACKED_WRITE,
};
#define mmc_packed_cmd(type) ((type) != MMC_PACKED_NONE)
#define mmc_packed_wr(type) ((type) == MMC_PACKED_WRITE)
struct mmc_packed {
struct list_head list;
u32 cmd_hdr[1024];
unsigned int blocks;
u8 nr_entries;
u8 retries;
s16 idx_failure;
};
mmc: block: add member in mmc queue struct to hold request data The way the request data is organized in the mmc queue struct, it only allows processing of one request at a time. This patch adds a new struct to hold mmc queue request data such as sg list, request, blk request and bounce buffers, and updates any functions depending on the mmc queue struct. This prepares for using multiple active requests in one mmc queue. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-10 05:12:36 +08:00
struct mmc_queue_req {
struct request *req;
struct mmc_blk_request brq;
struct scatterlist *sg;
char *bounce_buf;
struct scatterlist *bounce_sg;
unsigned int bounce_sg_len;
mmc: block: add handling for two parallel block requests in issue_rw_rq Change mmc_blk_issue_rw_rq() to become asynchronous. The execution flow looks like this: * The mmc-queue calls issue_rw_rq(), which sends the request to the host and returns back to the mmc-queue. * The mmc-queue calls issue_rw_rq() again with a new request. * This new request is prepared in issue_rw_rq(), then it waits for the active request to complete before pushing it to the host. * When the mmc-queue is empty it will call issue_rw_rq() with a NULL req to finish off the active request without starting a new request. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-02 00:55:33 +08:00
struct mmc_async_req mmc_active;
mmc: support packed write command for eMMC4.5 devices This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Large amounts of data in one transfer rather than several data of small size are effective for eMMC write internally. As a result, packed command help write throughput be improved. The following tables show the results of packed write. Type A: test none | packed iozone 25.8 | 31 tiotest 27.6 | 31.2 lmdd 31.2 | 35.4 Type B: test none | packed iozone 44.1 | 51.1 tiotest 47.9 | 52.5 lmdd 51.6 | 59.2 Type C: test none | packed iozone 19.5 | 32 tiotest 19.9 | 34.5 lmdd 22.8 | 40.7 Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-06 16:02:46 +08:00
enum mmc_packed_type cmd_type;
struct mmc_packed *packed;
mmc: block: add member in mmc queue struct to hold request data The way the request data is organized in the mmc queue struct, it only allows processing of one request at a time. This patch adds a new struct to hold mmc queue request data such as sg list, request, blk request and bounce buffers, and updates any functions depending on the mmc queue struct. This prepares for using multiple active requests in one mmc queue. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-10 05:12:36 +08:00
};
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct mmc_queue {
struct mmc_card *card;
mmc: remove kernel_thread() Replace kernel_thread() with kthread_run()/kthread_stop(). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2006-11-14 03:23:52 +08:00
struct task_struct *thread;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
struct semaphore thread_sem;
unsigned int flags;
mmc: fix async request mechanism for sequential read scenarios When current request is running on the bus and if next request fetched by mmcqd is NULL, mmc context (mmcqd thread) gets blocked until the current request completes. This means that if new request comes in while the mmcqd thread is blocked, this new request can not be prepared in parallel to current ongoing request. This may result in delaying the new request execution and increase it's latency. This change allows to wake up the MMC thread on new request arrival. Now once the MMC thread is woken up, a new request can be fetched and prepared in parallel to the current running request which means this new request can be started immediately after the current running request completes. With this change read throughput is improved by 16%. Signed-off-by: Konstantin Dorfman <kdorfman@codeaurora.org> Reviewed-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-01-15 03:28:17 +08:00
#define MMC_QUEUE_SUSPENDED (1 << 0)
#define MMC_QUEUE_NEW_REQUEST (1 << 1)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
int (*issue_fn)(struct mmc_queue *, struct request *);
void *data;
struct request_queue *queue;
mmc: queue: add a second mmc queue request member Add an additional mmc queue request instance to make way for two active block requests. One request may be active while the other request is being prepared. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-02 00:55:31 +08:00
struct mmc_queue_req mqrq[2];
mmc: block: add member in mmc queue struct to hold request data The way the request data is organized in the mmc queue struct, it only allows processing of one request at a time. This patch adds a new struct to hold mmc queue request data such as sg list, request, blk request and bounce buffers, and updates any functions depending on the mmc queue struct. This prepares for using multiple active requests in one mmc queue. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-10 05:12:36 +08:00
struct mmc_queue_req *mqrq_cur;
mmc: queue: add a second mmc queue request member Add an additional mmc queue request instance to make way for two active block requests. One request may be active while the other request is being prepared. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-02 00:55:31 +08:00
struct mmc_queue_req *mqrq_prev;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
};
mmc: queue: append partition subname to queue thread name For example, an eMMC with 2 boot partitions will have 3 threads. The names change from: 40 ? 00:00:00 mmcqd/0 41 ? 00:00:00 mmcqd/0 42 ? 00:00:00 mmcqd/0 to: 40 ? 00:00:00 mmcqd/0 41 ? 00:00:00 mmcqd/0boot0 42 ? 00:00:00 mmcqd/0boot1 Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andrei Warkentin <andreiw@motorola.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-06-23 18:40:28 +08:00
extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *,
const char *);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
extern void mmc_cleanup_queue(struct mmc_queue *);
extern void mmc_queue_suspend(struct mmc_queue *);
extern void mmc_queue_resume(struct mmc_queue *);
mmc: block: add member in mmc queue struct to hold request data The way the request data is organized in the mmc queue struct, it only allows processing of one request at a time. This patch adds a new struct to hold mmc queue request data such as sg list, request, blk request and bounce buffers, and updates any functions depending on the mmc queue struct. This prepares for using multiple active requests in one mmc queue. Signed-off-by: Per Forlin <per.forlin@linaro.org> Acked-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Venkatraman S <svenkatr@ti.com> Tested-by: Sourav Poddar <sourav.poddar@ti.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
2011-07-10 05:12:36 +08:00
extern unsigned int mmc_queue_map_sg(struct mmc_queue *,
struct mmc_queue_req *);
extern void mmc_queue_bounce_pre(struct mmc_queue_req *);
extern void mmc_queue_bounce_post(struct mmc_queue_req *);
mmc: bounce requests for simple hosts Some hosts cannot do scatter/gather in hardware. Since not doing sg is such a big performance hit, we (optionally) bounce the requests to a simple linear buffer that we hand over to the driver. Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-05-12 06:26:16 +08:00
mmc: support packed write command for eMMC4.5 devices This patch supports packed write command of eMMC4.5 devices. Several writes can be grouped in packed command and all data of the individual commands can be sent in a single transfer on the bus. Large amounts of data in one transfer rather than several data of small size are effective for eMMC write internally. As a result, packed command help write throughput be improved. The following tables show the results of packed write. Type A: test none | packed iozone 25.8 | 31 tiotest 27.6 | 31.2 lmdd 31.2 | 35.4 Type B: test none | packed iozone 44.1 | 51.1 tiotest 47.9 | 52.5 lmdd 51.6 | 59.2 Type C: test none | packed iozone 19.5 | 32 tiotest 19.9 | 34.5 lmdd 22.8 | 40.7 Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Reviewed-by: Maya Erez <merez@codeaurora.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
2013-02-06 16:02:46 +08:00
extern int mmc_packed_init(struct mmc_queue *, struct mmc_card *);
extern void mmc_packed_clean(struct mmc_queue *);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
#endif