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* [PATCH 15/18] MMC: OMAP: Move failing command abortion to workqueue
@ 2008-03-14 19:36 Carlos Aguiar
  0 siblings, 0 replies; 3+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:36 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Jarkko Lavinen <jarkko.lavinen@nokia.com>

Abort failed command from workqueue rather than from an interrupt,
allowing longer delays in abortion.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
---
 drivers/mmc/host/omap.c |   82 ++++++++++++++++++++++++++++-------------------
 1 files changed, 49 insertions(+), 33 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index c26ad3b..43719ae 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -134,8 +134,9 @@ struct mmc_omap_host {
 	unsigned char		bus_mode;
 	unsigned char		hw_bus_mode;
 
-	struct work_struct	cmd_abort;
-	struct timer_list	cmd_timer;
+	struct work_struct	cmd_abort_work;
+	unsigned		abort:1;
+	struct timer_list	cmd_abort_timer;
 
 	unsigned int		sg_len;
 	int			sg_idx;
@@ -320,7 +321,7 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 	if (host->data && !(host->data->flags & MMC_DATA_WRITE))
 		cmdreg |= 1 << 15;
 
-	mod_timer(&host->cmd_timer, jiffies + HZ/2);
+	mod_timer(&host->cmd_abort_timer, jiffies + HZ/2);
 
 	OMAP_MMC_WRITE(host, CTO, 200);
 	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
@@ -381,7 +382,7 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 }
 
 static void
-mmc_omap_send_abort(struct mmc_omap_host *host)
+mmc_omap_send_abort(struct mmc_omap_host *host, int maxloops)
 {
 	struct mmc_omap_slot *slot = host->current_slot;
 	unsigned int restarts, passes, timeout;
@@ -390,7 +391,7 @@ mmc_omap_send_abort(struct mmc_omap_host *host)
 	/* Sending abort takes 80 clocks. Have some extra and round up */
 	timeout = (120*1000000 + slot->fclk_freq - 1)/slot->fclk_freq;
 	restarts = 0;
-	while (restarts < 10000) {
+	while (restarts < maxloops) {
 		OMAP_MMC_WRITE(host, STAT, 0xFFFF);
 		OMAP_MMC_WRITE(host, CMD, (3 << 12) | (1 << 7));
 
@@ -412,18 +413,13 @@ out:
 static void
 mmc_omap_abort_xfer(struct mmc_omap_host *host, struct mmc_data *data)
 {
-	u16 ie;
-
 	if (host->dma_in_use)
 		mmc_omap_release_dma(host, data, 1);
 
 	host->data = NULL;
 	host->sg_len = 0;
 
-	ie = OMAP_MMC_READ(host, IE);
-	OMAP_MMC_WRITE(host, IE, 0);
-	OMAP_MMC_WRITE(host, IE, ie);
-	mmc_omap_send_abort(host);
+	mmc_omap_send_abort(host, 10000);
 }
 
 static void
@@ -479,7 +475,7 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 {
 	host->cmd = NULL;
 
-	del_timer(&host->cmd_timer);
+	del_timer(&host->cmd_abort_timer);
 
 	if (cmd->flags & MMC_RSP_PRESENT) {
 		if (cmd->flags & MMC_RSP_136) {
@@ -523,38 +519,48 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 static void mmc_omap_abort_command(struct work_struct *work)
 {
 	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
-						  cmd_abort);
-	u16 ie;
-
-	ie = OMAP_MMC_READ(host, IE);
-	OMAP_MMC_WRITE(host, IE, 0);
-
-	if (!host->cmd) {
-		OMAP_MMC_WRITE(host, IE, ie);
-		return;
-	}
+						  cmd_abort_work);
+	BUG_ON(!host->cmd);
 
 	dev_dbg(mmc_dev(host->mmc), "Aborting stuck command CMD%d\n",
 		host->cmd->opcode);
 
-	if (host->data && host->dma_in_use)
-		mmc_omap_release_dma(host, host->data, 1);
+	if (host->cmd->error == 0)
+		host->cmd->error = -ETIMEDOUT;
 
-	host->data = NULL;
-	host->sg_len = 0;
+	if (host->data == NULL) {
+		struct mmc_command *cmd;
+		struct mmc_host    *mmc;
+
+		cmd = host->cmd;
+		host->cmd = NULL;
+		mmc_omap_send_abort(host, 10000);
+
+		host->mrq = NULL;
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, cmd->mrq);
+	} else
+		mmc_omap_cmd_done(host, host->cmd);
 
-	mmc_omap_send_abort(host);
-	host->cmd->error = -ETIMEDOUT;
-	mmc_omap_cmd_done(host, host->cmd);
-	OMAP_MMC_WRITE(host, IE, ie);
+	host->abort = 0;
+	enable_irq(host->irq);
 }
 
 static void
 mmc_omap_cmd_timer(unsigned long data)
 {
 	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+	unsigned long flags;
 
-	schedule_work(&host->cmd_abort);
+	spin_lock_irqsave(&host->slot_lock, flags);
+	if (host->cmd != NULL && !host->abort) {
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		host->abort = 1;
+		schedule_work(&host->cmd_abort_work);
+	}
+	spin_unlock_irqrestore(&host->slot_lock, flags);
 }
 
 /* PIO only */
@@ -728,6 +734,15 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		}
 	}
 
+	if (cmd_error && host->data) {
+		del_timer(&host->cmd_abort_timer);
+		host->abort = 1;
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		schedule_work(&host->cmd_abort_work);
+		return IRQ_HANDLED;
+	}
+
 	if (end_command)
 		mmc_omap_cmd_done(host, host->cmd);
 	if (host->data != NULL) {
@@ -1338,8 +1353,9 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		goto err_free_mem_region;
 	}
 
-	INIT_WORK(&host->cmd_abort, mmc_omap_abort_command);
-	setup_timer(&host->cmd_timer, mmc_omap_cmd_timer, (unsigned long) host);
+	INIT_WORK(&host->cmd_abort_work, mmc_omap_abort_command);
+	setup_timer(&host->cmd_abort_timer, mmc_omap_cmd_timer,
+		    (unsigned long) host);
 
 	spin_lock_init(&host->dma_lock);
 	setup_timer(&host->dma_timer, mmc_omap_dma_timer, (unsigned long) host);
-- 1.5.3.GIT


^ permalink raw reply related	[flat|nested] 3+ messages in thread
* [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree
@ 2008-03-14 19:35 Carlos Aguiar
  2008-03-24 12:26 ` Pierre Ossman
  0 siblings, 1 reply; 3+ messages in thread
From: Carlos Aguiar @ 2008-03-14 19:35 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

Hi Pierre, Tony and folks,

The new version of the patch series that follows is a synchronization
of MMC OMAP driver from Linux-OMAP tree into mainline tree.

Improvements and corrections are based on comments from Pierre Ossman and 
Roel Kluin, from LKML.

Just to remind you, basically it brings MMC multislot support for OMAP boards 
with one slot (like H2 1611, H3 1710) or two slots (like H4 2420 and N800).
Others boards supported by such feature are: N770, Siemens SX1 and Apollon.

BR,

Carlos.

-- 
Carlos Eduardo Aguiar
Nokia Institute of Technology - INdT
Open Source Mobile Research Center - OSMRC - Manaus
Core Team
Phone: +55 92 2126-1079
Mobile: +55 92 8127-1797
E-mail: carlos.aguiar@indt.org.br


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [PATCH 15/18] MMC: OMAP: Move failing command abortion to workqueue
@ 2008-01-28 19:08 Carlos Aguiar
  0 siblings, 0 replies; 3+ messages in thread
From: Carlos Aguiar @ 2008-01-28 19:08 UTC (permalink / raw)
  To: Pierre Ossman; +Cc: Tony Lindgren, linux-kernel

From: Jarkko Lavinen <jarkko.lavinen@nokia.com>

Abort failed command from workqueue rather than from an interrupt,
allowing longer delays in abortion.

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
---
 drivers/mmc/host/omap.c |   82 ++++++++++++++++++++++++++++-------------------
 1 files changed, 49 insertions(+), 33 deletions(-)

diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 276ccf4..df15d96 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -135,8 +135,9 @@ struct mmc_omap_host {
 	unsigned char		bus_mode;
 	unsigned char		hw_bus_mode;
 
-	struct work_struct	cmd_abort;
-	struct timer_list	cmd_timer;
+	struct work_struct	cmd_abort_work;
+	unsigned		abort:1;
+	struct timer_list	cmd_abort_timer;
 
 	unsigned int		sg_len;
 	int			sg_idx;
@@ -335,7 +336,7 @@ mmc_omap_start_command(struct mmc_omap_host *host, struct mmc_command *cmd)
 	if (host->data && !(host->data->flags & MMC_DATA_WRITE))
 		cmdreg |= 1 << 15;
 
-	mod_timer(&host->cmd_timer, jiffies + HZ/2);
+	mod_timer(&host->cmd_abort_timer, jiffies + HZ/2);
 
 	OMAP_MMC_WRITE(host, CTO, 200);
 	OMAP_MMC_WRITE(host, ARGL, cmd->arg & 0xffff);
@@ -396,7 +397,7 @@ mmc_omap_xfer_done(struct mmc_omap_host *host, struct mmc_data *data)
 }
 
 static void
-mmc_omap_send_abort(struct mmc_omap_host *host)
+mmc_omap_send_abort(struct mmc_omap_host *host, int maxloops)
 {
 	struct mmc_omap_slot *slot = host->current_slot;
 	unsigned int restarts, passes, timeout;
@@ -405,7 +406,7 @@ mmc_omap_send_abort(struct mmc_omap_host *host)
 	/* Sending abort takes 80 clocks. Have some extra and round up */
 	timeout = (120*1000000 + slot->fclk_freq - 1)/slot->fclk_freq;
 	restarts = 0;
-	while (restarts < 10000) {
+	while (restarts < maxloops) {
 		OMAP_MMC_WRITE(host, STAT, 0xFFFF);
 		OMAP_MMC_WRITE(host, CMD, (3 << 12) | (1 << 7));
 
@@ -427,18 +428,13 @@ out:
 static void
 mmc_omap_abort_xfer(struct mmc_omap_host *host, struct mmc_data *data)
 {
-	u16 ie;
-
 	if (host->dma_in_use)
 		mmc_omap_release_dma(host, data, 1);
 
 	host->data = NULL;
 	host->sg_len = 0;
 
-	ie = OMAP_MMC_READ(host, IE);
-	OMAP_MMC_WRITE(host, IE, 0);
-	OMAP_MMC_WRITE(host, IE, ie);
-	mmc_omap_send_abort(host);
+	mmc_omap_send_abort(host, 10000);
 }
 
 static void
@@ -494,7 +490,7 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 {
 	host->cmd = NULL;
 
-	del_timer(&host->cmd_timer);
+	del_timer(&host->cmd_abort_timer);
 
 	if (cmd->flags & MMC_RSP_PRESENT) {
 		if (cmd->flags & MMC_RSP_136) {
@@ -538,38 +534,48 @@ mmc_omap_cmd_done(struct mmc_omap_host *host, struct mmc_command *cmd)
 static void mmc_omap_abort_command(struct work_struct *work)
 {
 	struct mmc_omap_host *host = container_of(work, struct mmc_omap_host,
-						  cmd_abort);
-	u16 ie;
-
-	ie = OMAP_MMC_READ(host, IE);
-	OMAP_MMC_WRITE(host, IE, 0);
-
-	if (!host->cmd) {
-		OMAP_MMC_WRITE(host, IE, ie);
-		return;
-	}
+						  cmd_abort_work);
+	BUG_ON(!host->cmd);
 
 	dev_dbg(mmc_dev(host->mmc), "Aborting stuck command CMD%d\n",
 		host->cmd->opcode);
 
-	if (host->data && host->dma_in_use)
-		mmc_omap_release_dma(host, host->data, 1);
+	if (host->cmd->error == 0)
+		host->cmd->error = -ETIMEDOUT;
 
-	host->data = NULL;
-	host->sg_len = 0;
+	if (host->data == NULL) {
+		struct mmc_command *cmd;
+		struct mmc_host    *mmc;
+
+		cmd = host->cmd;
+		host->cmd = NULL;
+		mmc_omap_send_abort(host, 10000);
+
+		host->mrq = NULL;
+		mmc = host->mmc;
+		mmc_omap_release_slot(host->current_slot);
+		mmc_request_done(mmc, cmd->mrq);
+	} else
+		mmc_omap_cmd_done(host, host->cmd);
 
-	mmc_omap_send_abort(host);
-	host->cmd->error = -ETIMEDOUT;
-	mmc_omap_cmd_done(host, host->cmd);
-	OMAP_MMC_WRITE(host, IE, ie);
+	host->abort = 0;
+	enable_irq(host->irq);
 }
 
 static void
 mmc_omap_cmd_timer(unsigned long data)
 {
 	struct mmc_omap_host *host = (struct mmc_omap_host *) data;
+	unsigned long flags;
 
-	schedule_work(&host->cmd_abort);
+	spin_lock_irqsave(&host->slot_lock, flags);
+	if (host->cmd != NULL && !host->abort) {
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		host->abort = 1;
+		schedule_work(&host->cmd_abort_work);
+	}
+	spin_unlock_irqrestore(&host->slot_lock, flags);
 }
 
 /* PIO only */
@@ -746,6 +752,15 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
 		}
 	}
 
+	if (cmd_error && host->data) {
+		del_timer(&host->cmd_abort_timer);
+		host->abort = 1;
+		OMAP_MMC_WRITE(host, IE, 0);
+		disable_irq(host->irq);
+		schedule_work(&host->cmd_abort_work);
+		return IRQ_HANDLED;
+	}
+
 	if (end_command)
 		mmc_omap_cmd_done(host, host->cmd);
 	if (host->data != NULL) {
@@ -1356,8 +1371,9 @@ static int __init mmc_omap_probe(struct platform_device *pdev)
 		goto err_free_mem_region;
 	}
 
-	INIT_WORK(&host->cmd_abort, mmc_omap_abort_command);
-	setup_timer(&host->cmd_timer, mmc_omap_cmd_timer, (unsigned long) host);
+	INIT_WORK(&host->cmd_abort_work, mmc_omap_abort_command);
+	setup_timer(&host->cmd_abort_timer, mmc_omap_cmd_timer,
+		    (unsigned long) host);
 
 	spin_lock_init(&host->dma_lock);
 	setup_timer(&host->dma_timer, mmc_omap_dma_timer, (unsigned long) host);
-- 1.5.3.GIT


^ permalink raw reply related	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2008-03-26 20:17 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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2008-03-14 19:36 [PATCH 15/18] MMC: OMAP: Move failing command abortion to workqueue Carlos Aguiar
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2008-03-14 19:35 [PATCH 00/18] MMC: OMAP: Sync MMC OMAP driver with mainline tree Carlos Aguiar
2008-03-24 12:26 ` Pierre Ossman
2008-03-26 20:09   ` [PATCH 15/18] MMC: OMAP: Move failing command abortion to workqueue Carlos Aguiar
2008-01-28 19:08 Carlos Aguiar

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