| Message ID | 20240626085015.32171-2-wsa+renesas@sang-engineering.com |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: sdhi: Convert from tasklet to BH workqueue | expand |
Hi Allen and Wolfram, Nice work. On 2024-06-26 10:48:21 +0200, Wolfram Sang wrote: > From: Allen Pais <allen.lkml@gmail.com> > > The only generic interface to execute asynchronously in the BH context is > tasklet; however, it's marked deprecated and has some design flaws. To > replace tasklets, BH workqueue support was recently added. A BH workqueue > behaves similarly to regular workqueues except that the queued work items > are executed in the BH context. > > This patch converts the SDHI driver from tasklet to BH workqueue. > > Based on the work done by Tejun Heo <tj@kernel.org> > > Signed-off-by: Allen Pais <allen.lkml@gmail.com> > [wsa: fixed build faliures, corrected whitespace issues] > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> > --- > > Tested on a Renesas Salvator X board with a R-Car M3-W SoC. Same > performance as with tasklets. Thank you Allen for your work! > > > drivers/mmc/host/renesas_sdhi.h | 4 ++- > drivers/mmc/host/renesas_sdhi_core.c | 2 ++ > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 26 +++++++++---------- > drivers/mmc/host/renesas_sdhi_sys_dmac.c | 9 +++---- > drivers/mmc/host/tmio_mmc.h | 3 ++- > drivers/mmc/host/tmio_mmc_core.c | 4 +-- > 6 files changed, 26 insertions(+), 22 deletions(-) > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h > index 586f94d4dbfd..f12a87442338 100644 > --- a/drivers/mmc/host/renesas_sdhi.h > +++ b/drivers/mmc/host/renesas_sdhi.h > @@ -11,6 +11,7 @@ > > #include <linux/dmaengine.h> > #include <linux/platform_device.h> > +#include <linux/workqueue.h> > #include "tmio_mmc.h" > > struct renesas_sdhi_scc { > @@ -67,7 +68,7 @@ struct renesas_sdhi_dma { > dma_filter_fn filter; > void (*enable)(struct tmio_mmc_host *host, bool enable); > struct completion dma_dataend; > - struct tasklet_struct dma_complete; > + struct work_struct dma_complete; > }; > > struct renesas_sdhi { > @@ -93,6 +94,7 @@ struct renesas_sdhi { > unsigned int tap_set; > > struct reset_control *rstc; > + struct tmio_mmc_host *host; > }; > > #define host_to_priv(host) \ > diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c > index 58536626e6c5..04874791541f 100644 > --- a/drivers/mmc/host/renesas_sdhi_core.c > +++ b/drivers/mmc/host/renesas_sdhi_core.c > @@ -970,6 +970,8 @@ int renesas_sdhi_probe(struct platform_device *pdev, > if (IS_ERR(host)) > return PTR_ERR(host); > > + priv->host = host; > + > if (of_data) { > mmc_data->flags |= of_data->tmio_flags; > mmc_data->ocr_mask = of_data->tmio_ocr_mask; > diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > index 422fa63a2e99..d4b66daeda66 100644 > --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > @@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host) > writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1); > set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags)) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > return status & dma_irqs; > @@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) > set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) || > host->data->error) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > /* > @@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, > renesas_sdhi_internal_dmac_enable_dma(host, false); > } > > -static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct tmio_mmc_host *host = from_work(host, work, dma_issue); > struct renesas_sdhi *priv = host_to_priv(host); > > tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); > @@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > /* on CMD errors, simulate DMA end immediately */ > set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags)) > - tasklet_schedule(&priv->dma_priv.dma_complete); > + queue_work(system_bh_wq, &priv->dma_priv.dma_complete); > } > } > > @@ -484,9 +484,11 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) > return true; > } > > -static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct renesas_sdhi_dma *dma_priv = from_work(dma_priv, work, dma_complete); > + struct renesas_sdhi *priv = container_of(dma_priv, typeof(*priv), dma_priv); > + struct tmio_mmc_host *host = priv->host; > > spin_lock_irq(&host->lock); > if (!renesas_sdhi_internal_dmac_complete(host)) > @@ -544,12 +546,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, > /* Each value is set to non-zero to assume "enabling" each DMA */ > host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; > > - tasklet_init(&priv->dma_priv.dma_complete, > - renesas_sdhi_internal_dmac_complete_tasklet_fn, > - (unsigned long)host); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_internal_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&priv->dma_priv.dma_complete, > + renesas_sdhi_internal_dmac_complete_work_fn); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_internal_dmac_issue_work_fn); > > /* Add pre_req and post_req */ > host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req; > diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > index 9cf7f9feab72..5a6f41318645 100644 > --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > @@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, > } > } > > -static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) > +static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; > + struct tmio_mmc_host *host = from_work(host, work, dma_issue); > struct dma_chan *chan = NULL; > > spin_lock_irq(&host->lock); > @@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, > goto ebouncebuf; > > init_completion(&priv->dma_priv.dma_dataend); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_sys_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_sys_dmac_issue_work_fn); > } > > renesas_sdhi_sys_dmac_enable_dma(host, true); > diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h > index 2af5730c21f4..a75755f31d31 100644 > --- a/drivers/mmc/host/tmio_mmc.h > +++ b/drivers/mmc/host/tmio_mmc.h > @@ -21,6 +21,7 @@ > #include <linux/scatterlist.h> > #include <linux/spinlock.h> > #include <linux/interrupt.h> > +#include <linux/workqueue.h> > > #define CTL_SD_CMD 0x00 > #define CTL_ARG_REG 0x04 > @@ -153,7 +154,7 @@ struct tmio_mmc_host { > bool dma_on; > struct dma_chan *chan_rx; > struct dma_chan *chan_tx; > - struct tasklet_struct dma_issue; > + struct work_struct dma_issue; > struct scatterlist bounce_sg; > u8 *bounce_buf; > > diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c > index 2780f0a29871..b61a6310311d 100644 > --- a/drivers/mmc/host/tmio_mmc_core.c > +++ b/drivers/mmc/host/tmio_mmc_core.c > @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_READOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } else { > if (!host->dma_on) { > @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_WRITEOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } > } else { > -- > 2.43.0 > >
On Wed, 26 Jun 2024 at 10:50, Wolfram Sang <wsa+renesas@sang-engineering.com> wrote: > > From: Allen Pais <allen.lkml@gmail.com> > > The only generic interface to execute asynchronously in the BH context is > tasklet; however, it's marked deprecated and has some design flaws. To > replace tasklets, BH workqueue support was recently added. A BH workqueue > behaves similarly to regular workqueues except that the queued work items > are executed in the BH context. > > This patch converts the SDHI driver from tasklet to BH workqueue. > > Based on the work done by Tejun Heo <tj@kernel.org> > > Signed-off-by: Allen Pais <allen.lkml@gmail.com> > [wsa: fixed build faliures, corrected whitespace issues] > Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Applied for next, thanks! Kind regards Uffe > --- > > Tested on a Renesas Salvator X board with a R-Car M3-W SoC. Same > performance as with tasklets. Thank you Allen for your work! > > > drivers/mmc/host/renesas_sdhi.h | 4 ++- > drivers/mmc/host/renesas_sdhi_core.c | 2 ++ > drivers/mmc/host/renesas_sdhi_internal_dmac.c | 26 +++++++++---------- > drivers/mmc/host/renesas_sdhi_sys_dmac.c | 9 +++---- > drivers/mmc/host/tmio_mmc.h | 3 ++- > drivers/mmc/host/tmio_mmc_core.c | 4 +-- > 6 files changed, 26 insertions(+), 22 deletions(-) > > diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h > index 586f94d4dbfd..f12a87442338 100644 > --- a/drivers/mmc/host/renesas_sdhi.h > +++ b/drivers/mmc/host/renesas_sdhi.h > @@ -11,6 +11,7 @@ > > #include <linux/dmaengine.h> > #include <linux/platform_device.h> > +#include <linux/workqueue.h> > #include "tmio_mmc.h" > > struct renesas_sdhi_scc { > @@ -67,7 +68,7 @@ struct renesas_sdhi_dma { > dma_filter_fn filter; > void (*enable)(struct tmio_mmc_host *host, bool enable); > struct completion dma_dataend; > - struct tasklet_struct dma_complete; > + struct work_struct dma_complete; > }; > > struct renesas_sdhi { > @@ -93,6 +94,7 @@ struct renesas_sdhi { > unsigned int tap_set; > > struct reset_control *rstc; > + struct tmio_mmc_host *host; > }; > > #define host_to_priv(host) \ > diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c > index 58536626e6c5..04874791541f 100644 > --- a/drivers/mmc/host/renesas_sdhi_core.c > +++ b/drivers/mmc/host/renesas_sdhi_core.c > @@ -970,6 +970,8 @@ int renesas_sdhi_probe(struct platform_device *pdev, > if (IS_ERR(host)) > return PTR_ERR(host); > > + priv->host = host; > + > if (of_data) { > mmc_data->flags |= of_data->tmio_flags; > mmc_data->ocr_mask = of_data->tmio_ocr_mask; > diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > index 422fa63a2e99..d4b66daeda66 100644 > --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c > @@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host) > writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1); > set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags)) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > return status & dma_irqs; > @@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) > set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags); > if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) || > host->data->error) > - tasklet_schedule(&dma_priv->dma_complete); > + queue_work(system_bh_wq, &dma_priv->dma_complete); > } > > /* > @@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, > renesas_sdhi_internal_dmac_enable_dma(host, false); > } > > -static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct tmio_mmc_host *host = from_work(host, work, dma_issue); > struct renesas_sdhi *priv = host_to_priv(host); > > tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); > @@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) > /* on CMD errors, simulate DMA end immediately */ > set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags); > if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags)) > - tasklet_schedule(&priv->dma_priv.dma_complete); > + queue_work(system_bh_wq, &priv->dma_priv.dma_complete); > } > } > > @@ -484,9 +484,11 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) > return true; > } > > -static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg) > +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; > + struct renesas_sdhi_dma *dma_priv = from_work(dma_priv, work, dma_complete); > + struct renesas_sdhi *priv = container_of(dma_priv, typeof(*priv), dma_priv); > + struct tmio_mmc_host *host = priv->host; > > spin_lock_irq(&host->lock); > if (!renesas_sdhi_internal_dmac_complete(host)) > @@ -544,12 +546,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, > /* Each value is set to non-zero to assume "enabling" each DMA */ > host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; > > - tasklet_init(&priv->dma_priv.dma_complete, > - renesas_sdhi_internal_dmac_complete_tasklet_fn, > - (unsigned long)host); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_internal_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&priv->dma_priv.dma_complete, > + renesas_sdhi_internal_dmac_complete_work_fn); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_internal_dmac_issue_work_fn); > > /* Add pre_req and post_req */ > host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req; > diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > index 9cf7f9feab72..5a6f41318645 100644 > --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c > +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c > @@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, > } > } > > -static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) > +static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *work) > { > - struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; > + struct tmio_mmc_host *host = from_work(host, work, dma_issue); > struct dma_chan *chan = NULL; > > spin_lock_irq(&host->lock); > @@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, > goto ebouncebuf; > > init_completion(&priv->dma_priv.dma_dataend); > - tasklet_init(&host->dma_issue, > - renesas_sdhi_sys_dmac_issue_tasklet_fn, > - (unsigned long)host); > + INIT_WORK(&host->dma_issue, > + renesas_sdhi_sys_dmac_issue_work_fn); > } > > renesas_sdhi_sys_dmac_enable_dma(host, true); > diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h > index 2af5730c21f4..a75755f31d31 100644 > --- a/drivers/mmc/host/tmio_mmc.h > +++ b/drivers/mmc/host/tmio_mmc.h > @@ -21,6 +21,7 @@ > #include <linux/scatterlist.h> > #include <linux/spinlock.h> > #include <linux/interrupt.h> > +#include <linux/workqueue.h> > > #define CTL_SD_CMD 0x00 > #define CTL_ARG_REG 0x04 > @@ -153,7 +154,7 @@ struct tmio_mmc_host { > bool dma_on; > struct dma_chan *chan_rx; > struct dma_chan *chan_tx; > - struct tasklet_struct dma_issue; > + struct work_struct dma_issue; > struct scatterlist bounce_sg; > u8 *bounce_buf; > > diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c > index 2780f0a29871..b61a6310311d 100644 > --- a/drivers/mmc/host/tmio_mmc_core.c > +++ b/drivers/mmc/host/tmio_mmc_core.c > @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_READOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } else { > if (!host->dma_on) { > @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) > } else { > tmio_mmc_disable_mmc_irqs(host, > TMIO_MASK_WRITEOP); > - tasklet_schedule(&host->dma_issue); > + queue_work(system_bh_wq, &host->dma_issue); > } > } > } else { > -- > 2.43.0 >
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index 586f94d4dbfd..f12a87442338 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -11,6 +11,7 @@ #include <linux/dmaengine.h> #include <linux/platform_device.h> +#include <linux/workqueue.h> #include "tmio_mmc.h" struct renesas_sdhi_scc { @@ -67,7 +68,7 @@ struct renesas_sdhi_dma { dma_filter_fn filter; void (*enable)(struct tmio_mmc_host *host, bool enable); struct completion dma_dataend; - struct tasklet_struct dma_complete; + struct work_struct dma_complete; }; struct renesas_sdhi { @@ -93,6 +94,7 @@ struct renesas_sdhi { unsigned int tap_set; struct reset_control *rstc; + struct tmio_mmc_host *host; }; #define host_to_priv(host) \ diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 58536626e6c5..04874791541f 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -970,6 +970,8 @@ int renesas_sdhi_probe(struct platform_device *pdev, if (IS_ERR(host)) return PTR_ERR(host); + priv->host = host; + if (of_data) { mmc_data->flags |= of_data->tmio_flags; mmc_data->ocr_mask = of_data->tmio_ocr_mask; diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 422fa63a2e99..d4b66daeda66 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -337,7 +337,7 @@ static bool renesas_sdhi_internal_dmac_dma_irq(struct tmio_mmc_host *host) writel(status ^ dma_irqs, host->ctl + DM_CM_INFO1); set_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags); if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags)) - tasklet_schedule(&dma_priv->dma_complete); + queue_work(system_bh_wq, &dma_priv->dma_complete); } return status & dma_irqs; @@ -352,7 +352,7 @@ renesas_sdhi_internal_dmac_dataend_dma(struct tmio_mmc_host *host) set_bit(SDHI_DMA_END_FLAG_ACCESS, &dma_priv->end_flags); if (test_bit(SDHI_DMA_END_FLAG_DMA, &dma_priv->end_flags) || host->data->error) - tasklet_schedule(&dma_priv->dma_complete); + queue_work(system_bh_wq, &dma_priv->dma_complete); } /* @@ -440,9 +440,9 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host, renesas_sdhi_internal_dmac_enable_dma(host, false); } -static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) +static void renesas_sdhi_internal_dmac_issue_work_fn(struct work_struct *work) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; + struct tmio_mmc_host *host = from_work(host, work, dma_issue); struct renesas_sdhi *priv = host_to_priv(host); tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); @@ -454,7 +454,7 @@ static void renesas_sdhi_internal_dmac_issue_tasklet_fn(unsigned long arg) /* on CMD errors, simulate DMA end immediately */ set_bit(SDHI_DMA_END_FLAG_DMA, &priv->dma_priv.end_flags); if (test_bit(SDHI_DMA_END_FLAG_ACCESS, &priv->dma_priv.end_flags)) - tasklet_schedule(&priv->dma_priv.dma_complete); + queue_work(system_bh_wq, &priv->dma_priv.dma_complete); } } @@ -484,9 +484,11 @@ static bool renesas_sdhi_internal_dmac_complete(struct tmio_mmc_host *host) return true; } -static void renesas_sdhi_internal_dmac_complete_tasklet_fn(unsigned long arg) +static void renesas_sdhi_internal_dmac_complete_work_fn(struct work_struct *work) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)arg; + struct renesas_sdhi_dma *dma_priv = from_work(dma_priv, work, dma_complete); + struct renesas_sdhi *priv = container_of(dma_priv, typeof(*priv), dma_priv); + struct tmio_mmc_host *host = priv->host; spin_lock_irq(&host->lock); if (!renesas_sdhi_internal_dmac_complete(host)) @@ -544,12 +546,10 @@ renesas_sdhi_internal_dmac_request_dma(struct tmio_mmc_host *host, /* Each value is set to non-zero to assume "enabling" each DMA */ host->chan_rx = host->chan_tx = (void *)0xdeadbeaf; - tasklet_init(&priv->dma_priv.dma_complete, - renesas_sdhi_internal_dmac_complete_tasklet_fn, - (unsigned long)host); - tasklet_init(&host->dma_issue, - renesas_sdhi_internal_dmac_issue_tasklet_fn, - (unsigned long)host); + INIT_WORK(&priv->dma_priv.dma_complete, + renesas_sdhi_internal_dmac_complete_work_fn); + INIT_WORK(&host->dma_issue, + renesas_sdhi_internal_dmac_issue_work_fn); /* Add pre_req and post_req */ host->ops.pre_req = renesas_sdhi_internal_dmac_pre_req; diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c index 9cf7f9feab72..5a6f41318645 100644 --- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c @@ -312,9 +312,9 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, } } -static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) +static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *work) { - struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; + struct tmio_mmc_host *host = from_work(host, work, dma_issue); struct dma_chan *chan = NULL; spin_lock_irq(&host->lock); @@ -401,9 +401,8 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, goto ebouncebuf; init_completion(&priv->dma_priv.dma_dataend); - tasklet_init(&host->dma_issue, - renesas_sdhi_sys_dmac_issue_tasklet_fn, - (unsigned long)host); + INIT_WORK(&host->dma_issue, + renesas_sdhi_sys_dmac_issue_work_fn); } renesas_sdhi_sys_dmac_enable_dma(host, true); diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 2af5730c21f4..a75755f31d31 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -21,6 +21,7 @@ #include <linux/scatterlist.h> #include <linux/spinlock.h> #include <linux/interrupt.h> +#include <linux/workqueue.h> #define CTL_SD_CMD 0x00 #define CTL_ARG_REG 0x04 @@ -153,7 +154,7 @@ struct tmio_mmc_host { bool dma_on; struct dma_chan *chan_rx; struct dma_chan *chan_tx; - struct tasklet_struct dma_issue; + struct work_struct dma_issue; struct scatterlist bounce_sg; u8 *bounce_buf; diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c index 2780f0a29871..b61a6310311d 100644 --- a/drivers/mmc/host/tmio_mmc_core.c +++ b/drivers/mmc/host/tmio_mmc_core.c @@ -608,7 +608,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } else { if (!host->dma_on) { @@ -616,7 +616,7 @@ static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, unsigned int stat) } else { tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_WRITEOP); - tasklet_schedule(&host->dma_issue); + queue_work(system_bh_wq, &host->dma_issue); } } } else {