diff options
| -rw-r--r-- | arch/arm/plat-nomadik/include/plat/ste_dma40.h | 13 | ||||
| -rw-r--r-- | drivers/dma/ste_dma40.c | 72 | ||||
| -rw-r--r-- | drivers/dma/ste_dma40_ll.c | 8 | ||||
| -rw-r--r-- | drivers/dma/ste_dma40_ll.h | 30 |
4 files changed, 57 insertions, 66 deletions
diff --git a/arch/arm/plat-nomadik/include/plat/ste_dma40.h b/arch/arm/plat-nomadik/include/plat/ste_dma40.h index ee5d8b2e46dd..879a6c1ac60f 100644 --- a/arch/arm/plat-nomadik/include/plat/ste_dma40.h +++ b/arch/arm/plat-nomadik/include/plat/ste_dma40.h @@ -1,10 +1,8 @@ /* - * arch/arm/plat-nomadik/include/plat/ste_dma40.h - * - * Copyright (C) ST-Ericsson 2007-2010 + * Copyright (C) ST-Ericsson SA 2007-2010 + * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson * License terms: GNU General Public License (GPL) version 2 - * Author: Per Friden <per.friden@stericsson.com> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> */ @@ -73,6 +71,9 @@ #define STEDMA40_PSIZE_LOG_8 STEDMA40_PSIZE_PHY_8 #define STEDMA40_PSIZE_LOG_16 STEDMA40_PSIZE_PHY_16 +/* Maximum number of possible physical channels */ +#define STEDMA40_MAX_PHYS 32 + enum stedma40_flow_ctrl { STEDMA40_NO_FLOW_CTRL, STEDMA40_FLOW_CTRL, @@ -160,7 +161,7 @@ struct stedma40_platform_data { struct stedma40_chan_cfg *memcpy_conf_phy; struct stedma40_chan_cfg *memcpy_conf_log; unsigned int llis_per_log; - int disabled_channels[8]; + int disabled_channels[STEDMA40_MAX_PHYS]; }; /** diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index b8987e791055..7a4919bf1e92 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -1,11 +1,8 @@ /* - * driver/dma/ste_dma40.c - * - * Copyright (C) ST-Ericsson 2007-2010 + * Copyright (C) ST-Ericsson SA 2007-2010 + * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson * License terms: GNU General Public License (GPL) version 2 - * Author: Per Friden <per.friden@stericsson.com> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> - * */ #include <linux/kernel.h> @@ -90,7 +87,6 @@ struct d40_lli_pool { * @txd: DMA engine struct. Used for among other things for communication * during a transfer. * @node: List entry. - * @dir: The transfer direction of this job. * @is_in_client_list: true if the client owns this descriptor. * @is_hw_linked: true if this job will automatically be continued for * the previous one. @@ -112,7 +108,6 @@ struct d40_desc { struct dma_async_tx_descriptor txd; struct list_head node; - enum dma_data_direction dir; bool is_in_client_list; bool is_hw_linked; }; @@ -149,9 +144,7 @@ struct d40_lcla_pool { * this physical channel. Can also be free or physically allocated. * @allocated_dst: Same as for src but is dst. * allocated_dst and allocated_src uses the D40_ALLOC* defines as well as - * event line number. Both allocated_src and allocated_dst can not be - * allocated to a physical channel, since the interrupt handler has then - * no way of figure out which one the interrupt belongs to. + * event line number. */ struct d40_phy_res { spinlock_t lock; @@ -237,7 +230,6 @@ struct d40_chan { * @dma_both: dma_device channels that can do both memcpy and slave transfers. * @dma_slave: dma_device channels that can do only do slave transfers. * @dma_memcpy: dma_device channels that can do only do memcpy transfers. - * @phy_chans: Room for all possible physical channels in system. * @log_chans: Room for all possible logical channels in system. * @lookup_log_chans: Used to map interrupt number to logical channel. Points * to log_chans entries. @@ -500,7 +492,8 @@ err: static int d40_channel_execute_command(struct d40_chan *d40c, enum d40_command command) { - int status, i; + u32 status; + int i; void __iomem *active_reg; int ret = 0; unsigned long flags; @@ -568,16 +561,12 @@ static void d40_term_all(struct d40_chan *d40c) /* Release active descriptors */ while ((d40d = d40_first_active_get(d40c))) { d40_desc_remove(d40d); - - /* Return desc to free-list */ d40_desc_free(d40c, d40d); } /* Release queued descriptors waiting for transfer */ while ((d40d = d40_first_queued(d40c))) { d40_desc_remove(d40d); - - /* Return desc to free-list */ d40_desc_free(d40c, d40d); } @@ -973,9 +962,6 @@ static void dma_tc_handle(struct d40_chan *d40c) { struct d40_desc *d40d; - if (!d40c->phy_chan) - return; - /* Get first active entry from list */ d40d = d40_first_active_get(d40c); @@ -1001,7 +987,7 @@ static void dma_tc_handle(struct d40_chan *d40c) static void dma_tasklet(unsigned long data) { struct d40_chan *d40c = (struct d40_chan *) data; - struct d40_desc *d40d_fin; + struct d40_desc *d40d; unsigned long flags; dma_async_tx_callback callback; void *callback_param; @@ -1009,12 +995,12 @@ static void dma_tasklet(unsigned long data) spin_lock_irqsave(&d40c->lock, flags); /* Get first active entry from list */ - d40d_fin = d40_first_active_get(d40c); + d40d = d40_first_active_get(d40c); - if (d40d_fin == NULL) + if (d40d == NULL) goto err; - d40c->completed = d40d_fin->txd.cookie; + d40c->completed = d40d->txd.cookie; /* * If terminating a channel pending_tx is set to zero. @@ -1026,19 +1012,18 @@ static void dma_tasklet(unsigned long data) } /* Callback to client */ - callback = d40d_fin->txd.callback; - callback_param = d40d_fin->txd.callback_param; - - if (async_tx_test_ack(&d40d_fin->txd)) { - d40_pool_lli_free(d40d_fin); - d40_desc_remove(d40d_fin); - /* Return desc to free-list */ - d40_desc_free(d40c, d40d_fin); + callback = d40d->txd.callback; + callback_param = d40d->txd.callback_param; + + if (async_tx_test_ack(&d40d->txd)) { + d40_pool_lli_free(d40d); + d40_desc_remove(d40d); + d40_desc_free(d40c, d40d); } else { - if (!d40d_fin->is_in_client_list) { - d40_desc_remove(d40d_fin); - list_add_tail(&d40d_fin->node, &d40c->client); - d40d_fin->is_in_client_list = true; + if (!d40d->is_in_client_list) { + d40_desc_remove(d40d); + list_add_tail(&d40d->node, &d40c->client); + d40d->is_in_client_list = true; } } @@ -1049,7 +1034,7 @@ static void dma_tasklet(unsigned long data) spin_unlock_irqrestore(&d40c->lock, flags); - if (callback && (d40d_fin->txd.flags & DMA_PREP_INTERRUPT)) + if (callback && (d40d->txd.flags & DMA_PREP_INTERRUPT)) callback(callback_param); return; @@ -1127,7 +1112,6 @@ static irqreturn_t d40_handle_interrupt(int irq, void *data) return IRQ_HANDLED; } - static int d40_validate_conf(struct d40_chan *d40c, struct stedma40_chan_cfg *conf) { @@ -1432,7 +1416,6 @@ static int d40_free_dma(struct d40_chan *d40c) list_for_each_entry_safe(d, _d, &d40c->client, node) { d40_pool_lli_free(d); d40_desc_remove(d); - /* Return desc to free-list */ d40_desc_free(d40c, d); } @@ -2793,8 +2776,10 @@ static int __init d40_lcla_allocate(struct d40_base *base) if (i < MAX_LCLA_ALLOC_ATTEMPTS) { base->lcla_pool.base = (void *)page_list[i]; } else { - /* After many attempts, no succees with finding the correct - * alignment try with allocating a big buffer */ + /* + * After many attempts and no succees with finding the correct + * alignment, try with allocating a big buffer. + */ dev_warn(base->dev, "[%s] Failed to get %d pages @ 18 bit align.\n", __func__, base->lcla_pool.pages); @@ -2916,8 +2901,9 @@ failure: if (!base->lcla_pool.base_unaligned && base->lcla_pool.base) free_pages((unsigned long)base->lcla_pool.base, base->lcla_pool.pages); - if (base->lcla_pool.base_unaligned) - kfree(base->lcla_pool.base_unaligned); + + kfree(base->lcla_pool.base_unaligned); + if (base->phy_lcpa) release_mem_region(base->phy_lcpa, base->lcpa_size); diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c index 67076726b874..92a0960fba08 100644 --- a/drivers/dma/ste_dma40_ll.c +++ b/drivers/dma/ste_dma40_ll.c @@ -1,10 +1,8 @@ /* - * driver/dma/ste_dma40_ll.c - * - * Copyright (C) ST-Ericsson 2007-2010 + * Copyright (C) ST-Ericsson SA 2007-2010 + * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson * License terms: GNU General Public License (GPL) version 2 - * Author: Per Friden <per.friden@stericsson.com> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> */ #include <linux/kernel.h> diff --git a/drivers/dma/ste_dma40_ll.h b/drivers/dma/ste_dma40_ll.h index be35fadddf75..a51ec187b5cf 100644 --- a/drivers/dma/ste_dma40_ll.h +++ b/drivers/dma/ste_dma40_ll.h @@ -1,10 +1,8 @@ /* - * driver/dma/ste_dma40_ll.h - * - * Copyright (C) ST-Ericsson 2007-2010 + * Copyright (C) ST-Ericsson SA 2007-2010 + * Author: Per Friden <per.friden@stericsson.com> for ST-Ericsson SA + * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson SA * License terms: GNU General Public License (GPL) version 2 - * Author: Per Friden <per.friden@stericsson.com> - * Author: Jonas Aaberg <jonas.aberg@stericsson.com> */ #ifndef STE_DMA40_LL_H #define STE_DMA40_LL_H @@ -289,10 +287,13 @@ struct d40_lcla_elem { /* Physical channels */ void d40_phy_cfg(struct stedma40_chan_cfg *cfg, - u32 *src_cfg, u32 *dst_cfg, bool is_log); + u32 *src_cfg, + u32 *dst_cfg, + bool is_log); void d40_log_cfg(struct stedma40_chan_cfg *cfg, - u32 *lcsp1, u32 *lcsp2); + u32 *lcsp1, + u32 *lcsp2); int d40_phy_sg_to_lli(struct scatterlist *sg, int sg_len, @@ -321,10 +322,13 @@ void d40_phy_lli_write(void __iomem *virtbase, /* Logical channels */ void d40_log_fill_lli(struct d40_log_lli *lli, - dma_addr_t data, u32 data_size, - u32 lli_next_off, u32 reg_cfg, + dma_addr_t data, + u32 data_size, + u32 lli_next_off, + u32 reg_cfg, u32 data_width, - bool term_int, bool addr_inc); + bool term_int, + bool addr_inc); int d40_log_sg_to_dev(struct d40_lcla_elem *lcla, struct scatterlist *sg, @@ -334,7 +338,8 @@ int d40_log_sg_to_dev(struct d40_lcla_elem *lcla, u32 src_data_width, u32 dst_data_width, enum dma_data_direction direction, - dma_addr_t dev_addr, int max_len, + dma_addr_t dev_addr, + int max_len, int llis_per_log); int d40_log_lli_write(struct d40_log_lli_full *lcpa, @@ -350,6 +355,7 @@ int d40_log_sg_to_lli(int lcla_id, struct d40_log_lli *lli_sg, u32 lcsp13, /* src or dst*/ u32 data_width, - int max_len, int llis_per_log); + int max_len, + int llis_per_log); #endif /* STE_DMA40_LLI_H */ |