diff options
Diffstat (limited to 'drivers')
44 files changed, 1941 insertions, 961 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index dacf3f42426d..de511db021cc 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -143,7 +143,7 @@ config DMA_JZ4740 config DMA_JZ4780 tristate "JZ4780 DMA support" - depends on MACH_JZ4780 || COMPILE_TEST + depends on MIPS || COMPILE_TEST select DMA_ENGINE select DMA_VIRTUAL_CHANNELS help @@ -321,6 +321,17 @@ config LPC18XX_DMAMUX Enable support for DMA on NXP LPC18xx/43xx platforms with PL080 and multiplexed DMA request lines. +config MCF_EDMA + tristate "Freescale eDMA engine support, ColdFire mcf5441x SoCs" + depends on M5441x || COMPILE_TEST + select DMA_ENGINE + select DMA_VIRTUAL_CHANNELS + help + Support the Freescale ColdFire eDMA engine, 64-channel + implementation that performs complex data transfers with + minimal intervention from a host processor. + This module can be found on Freescale ColdFire mcf5441x SoCs. + config MMP_PDMA bool "MMP PDMA support" depends on ARCH_MMP || ARCH_PXA || COMPILE_TEST diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile index c91702d88b95..7fcc4d8e336d 100644 --- a/drivers/dma/Makefile +++ b/drivers/dma/Makefile @@ -31,7 +31,8 @@ obj-$(CONFIG_DW_AXI_DMAC) += dw-axi-dmac/ obj-$(CONFIG_DW_DMAC_CORE) += dw/ obj-$(CONFIG_EP93XX_DMA) += ep93xx_dma.o obj-$(CONFIG_FSL_DMA) += fsldma.o -obj-$(CONFIG_FSL_EDMA) += fsl-edma.o +obj-$(CONFIG_FSL_EDMA) += fsl-edma.o fsl-edma-common.o +obj-$(CONFIG_MCF_EDMA) += mcf-edma.o fsl-edma-common.o obj-$(CONFIG_FSL_RAID) += fsl_raid.o obj-$(CONFIG_HSU_DMA) += hsu/ obj-$(CONFIG_IMG_MDC_DMA) += img-mdc-dma.o diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 75f38d19fcbe..7cbac6e8c113 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -1320,7 +1320,7 @@ atc_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, if (unlikely(!is_slave_direction(direction))) goto err_out; - if (sconfig->direction == DMA_MEM_TO_DEV) + if (direction == DMA_MEM_TO_DEV) reg_width = convert_buswidth(sconfig->dst_addr_width); else reg_width = convert_buswidth(sconfig->src_addr_width); diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c index 4bf72561667c..4e557684f792 100644 --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -1600,7 +1600,7 @@ static void at_xdmac_tasklet(unsigned long data) if (atchan->status & AT_XDMAC_CIS_ROIS) dev_err(chan2dev(&atchan->chan), "request overflow error!!!"); - spin_lock_bh(&atchan->lock); + spin_lock(&atchan->lock); desc = list_first_entry(&atchan->xfers_list, struct at_xdmac_desc, xfer_node); @@ -1610,7 +1610,7 @@ static void at_xdmac_tasklet(unsigned long data) txd = &desc->tx_dma_desc; at_xdmac_remove_xfer(atchan, desc); - spin_unlock_bh(&atchan->lock); + spin_unlock(&atchan->lock); if (!at_xdmac_chan_is_cyclic(atchan)) { dma_cookie_complete(txd); diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c index 847f84a41a69..cad55ab80d41 100644 --- a/drivers/dma/bcm2835-dma.c +++ b/drivers/dma/bcm2835-dma.c @@ -778,14 +778,6 @@ static int bcm2835_dma_slave_config(struct dma_chan *chan, { struct bcm2835_chan *c = to_bcm2835_dma_chan(chan); - if ((cfg->direction == DMA_DEV_TO_MEM && - cfg->src_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) || - (cfg->direction == DMA_MEM_TO_DEV && - cfg->dst_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) || - !is_slave_direction(cfg->direction)) { - return -EINVAL; - } - c->cfg = *cfg; return 0; diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index da74fd74636b..eebaba3d9e78 100644 --- a/drivers/dma/coh901318.c +++ b/drivers/dma/coh901318.c @@ -1306,6 +1306,7 @@ struct coh901318_chan { unsigned long nbr_active_done; unsigned long busy; + struct dma_slave_config config; u32 addr; u32 ctrl; @@ -1402,6 +1403,10 @@ static inline struct coh901318_chan *to_coh901318_chan(struct dma_chan *chan) return container_of(chan, struct coh901318_chan, chan); } +static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan, + struct dma_slave_config *config, + enum dma_transfer_direction direction); + static inline const struct coh901318_params * cohc_chan_param(struct coh901318_chan *cohc) { @@ -2360,6 +2365,8 @@ coh901318_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, if (lli == NULL) goto err_dma_alloc; + coh901318_dma_set_runtimeconfig(chan, &cohc->config, direction); + /* initiate allocated lli list */ ret = coh901318_lli_fill_sg(&cohc->base->pool, lli, sgl, sg_len, cohc->addr, @@ -2499,7 +2506,8 @@ static const struct burst_table burst_sizes[] = { }; static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan, - struct dma_slave_config *config) + struct dma_slave_config *config, + enum dma_transfer_direction direction) { struct coh901318_chan *cohc = to_coh901318_chan(chan); dma_addr_t addr; @@ -2509,11 +2517,11 @@ static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan, int i = 0; /* We only support mem to per or per to mem transfers */ - if (config->direction == DMA_DEV_TO_MEM) { + if (direction == DMA_DEV_TO_MEM) { addr = config->src_addr; addr_width = config->src_addr_width; maxburst = config->src_maxburst; - } else if (config->direction == DMA_MEM_TO_DEV) { + } else if (direction == DMA_MEM_TO_DEV) { addr = config->dst_addr; addr_width = config->dst_addr_width; maxburst = config->dst_maxburst; @@ -2579,6 +2587,16 @@ static int coh901318_dma_set_runtimeconfig(struct dma_chan *chan, return 0; } +static int coh901318_dma_slave_config(struct dma_chan *chan, + struct dma_slave_config *config) +{ + struct coh901318_chan *cohc = to_coh901318_chan(chan); + + memcpy(&cohc->config, config, sizeof(*config)); + + return 0; +} + static void coh901318_base_init(struct dma_device *dma, const int *pick_chans, struct coh901318_base *base) { @@ -2684,7 +2702,7 @@ static int __init coh901318_probe(struct platform_device *pdev) base->dma_slave.device_prep_slave_sg = coh901318_prep_slave_sg; base->dma_slave.device_tx_status = coh901318_tx_status; base->dma_slave.device_issue_pending = coh901318_issue_pending; - base->dma_slave.device_config = coh901318_dma_set_runtimeconfig; + base->dma_slave.device_config = coh901318_dma_slave_config; base->dma_slave.device_pause = coh901318_pause; base->dma_slave.device_resume = coh901318_resume; base->dma_slave.device_terminate_all = coh901318_terminate_all; @@ -2707,7 +2725,7 @@ static int __init coh901318_probe(struct platform_device *pdev) base->dma_memcpy.device_prep_dma_memcpy = coh901318_prep_memcpy; base->dma_memcpy.device_tx_status = coh901318_tx_status; base->dma_memcpy.device_issue_pending = coh901318_issue_pending; - base->dma_memcpy.device_config = coh901318_dma_set_runtimeconfig; + base->dma_memcpy.device_config = coh901318_dma_slave_config; base->dma_memcpy.device_pause = coh901318_pause; base->dma_memcpy.device_resume = coh901318_resume; base->dma_memcpy.device_terminate_all = coh901318_terminate_all; diff --git a/drivers/dma/dma-jz4740.c b/drivers/dma/dma-jz4740.c index afd5e10f8927..5253e3c0dc04 100644 --- a/drivers/dma/dma-jz4740.c +++ b/drivers/dma/dma-jz4740.c @@ -113,6 +113,7 @@ struct jz4740_dma_desc { struct jz4740_dmaengine_chan { struct virt_dma_chan vchan; unsigned int id; + struct dma_slave_config config; dma_addr_t fifo_addr; unsigned int transfer_shift; @@ -203,8 +204,9 @@ static enum jz4740_dma_transfer_size jz4740_dma_maxburst(u32 maxburst) return JZ4740_DMA_TRANSFER_SIZE_32BYTE; } -static int jz4740_dma_slave_config(struct dma_chan *c, - struct dma_slave_config *config) +static int jz4740_dma_slave_config_write(struct dma_chan *c, + struct dma_slave_config *config, + enum dma_transfer_direction direction) { struct jz4740_dmaengine_chan *chan = to_jz4740_dma_chan(c); struct jz4740_dma_dev *dmadev = jz4740_dma_chan_get_dev(chan); @@ -214,7 +216,7 @@ static int jz4740_dma_slave_config(struct dma_chan *c, enum jz4740_dma_flags flags; uint32_t cmd; - switch (config->direction) { + switch (direction) { case DMA_MEM_TO_DEV: flags = JZ4740_DMA_SRC_AUTOINC; transfer_size = jz4740_dma_maxburst(config->dst_maxburst); @@ -265,6 +267,15 @@ static int jz4740_dma_slave_config(struct dma_chan *c, return 0; } +static int jz4740_dma_slave_config(struct dma_chan *c, + struct dma_slave_config *config) +{ + struct jz4740_dmaengine_chan *chan = to_jz4740_dma_chan(c); + + memcpy(&chan->config, config, sizeof(*config)); + return 0; +} + static int jz4740_dma_terminate_all(struct dma_chan *c) { struct jz4740_dmaengine_chan *chan = to_jz4740_dma_chan(c); @@ -407,6 +418,8 @@ static struct dma_async_tx_descriptor *jz4740_dma_prep_slave_sg( desc->direction = direction; desc->cyclic = false; + jz4740_dma_slave_config_write(c, &chan->config, direction); + return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); } @@ -438,6 +451,8 @@ static struct dma_async_tx_descriptor *jz4740_dma_prep_dma_cyclic( desc->direction = direction; desc->cyclic = true; + jz4740_dma_slave_config_write(c, &chan->config, direction); + return vchan_tx_prep(&chan->vchan, &desc->vdesc, flags); } diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c index 85820a2d69d4..a8b6225faa12 100644 --- a/drivers/dma/dma-jz4780.c +++ b/drivers/dma/dma-jz4780.c @@ -16,6 +16,7 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/of_dma.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -23,33 +24,35 @@ #include "dmaengine.h" #include "virt-dma.h" -#define JZ_DMA_NR_CHANNELS 32 - /* Global registers. */ -#define JZ_DMA_REG_DMAC 0x1000 -#define JZ_DMA_REG_DIRQP 0x1004 -#define JZ_DMA_REG_DDR 0x1008 -#define JZ_DMA_REG_DDRS 0x100c -#define JZ_DMA_REG_DMACP 0x101c -#define JZ_DMA_REG_DSIRQP 0x1020 -#define JZ_DMA_REG_DSIRQM 0x1024 -#define JZ_DMA_REG_DCIRQP 0x1028 -#define JZ_DMA_REG_DCIRQM 0x102c +#define JZ_DMA_REG_DMAC 0x00 +#define JZ_DMA_REG_DIRQP 0x04 +#define JZ_DMA_REG_DDR 0x08 +#define JZ_DMA_REG_DDRS 0x0c +#define JZ_DMA_REG_DCKE 0x10 +#define JZ_DMA_REG_DCKES 0x14 +#define JZ_DMA_REG_DCKEC 0x18 +#define JZ_DMA_REG_DMACP 0x1c +#define JZ_DMA_REG_DSIRQP 0x20 +#define JZ_DMA_REG_DSIRQM 0x24 +#define JZ_DMA_REG_DCIRQP 0x28 +#define JZ_DMA_REG_DCIRQM 0x2c /* Per-channel registers. */ #define JZ_DMA_REG_CHAN(n) (n * 0x20) -#define JZ_DMA_REG_DSA(n) (0x00 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DTA(n) (0x04 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DTC(n) (0x08 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DRT(n) (0x0c + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DCS(n) (0x10 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DCM(n) (0x14 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DDA(n) (0x18 + JZ_DMA_REG_CHAN(n)) -#define JZ_DMA_REG_DSD(n) (0x1c + JZ_DMA_REG_CHAN(n)) +#define JZ_DMA_REG_DSA 0x00 +#define JZ_DMA_REG_DTA 0x04 +#define JZ_DMA_REG_DTC 0x08 +#define JZ_DMA_REG_DRT 0x0c +#define JZ_DMA_REG_DCS 0x10 +#define JZ_DMA_REG_DCM 0x14 +#define JZ_DMA_REG_DDA 0x18 +#define JZ_DMA_REG_DSD 0x1c #define JZ_DMA_DMAC_DMAE BIT(0) #define JZ_DMA_DMAC_AR BIT(2) #define JZ_DMA_DMAC_HLT BIT(3) +#define JZ_DMA_DMAC_FAIC BIT(27) #define JZ_DMA_DMAC_FMSC BIT(31) #define JZ_DMA_DRT_AUTO 0x8 @@ -86,6 +89,14 @@ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES)) +#define JZ4780_DMA_CTRL_OFFSET 0x1000 + +/* macros for use with jz4780_dma_soc_data.flags */ +#define JZ_SOC_DATA_ALLOW_LEGACY_DT BIT(0) +#define JZ_SOC_DATA_PROGRAMMABLE_DMA BIT(1) +#define JZ_SOC_DATA_PER_CHAN_PM BIT(2) +#define JZ_SOC_DATA_NO_DCKES_DCKEC BIT(3) + /** * struct jz4780_dma_hwdesc - descriptor structure read by the DMA controller. * @dcm: value for the DCM (channel command) register @@ -94,17 +105,12 @@ * @dtc: transfer count (number of blocks of the transfer size specified in DCM * to transfer) in the low 24 bits, offset of the next descriptor from the * descriptor base address in the upper 8 bits. - * @sd: target/source stride difference (in stride transfer mode). - * @drt: request type */ struct jz4780_dma_hwdesc { uint32_t dcm; uint32_t dsa; uint32_t dta; uint32_t dtc; - uint32_t sd; - uint32_t drt; - uint32_t reserved[2]; }; /* Size of allocations for hardware descriptor blocks. */ @@ -135,14 +141,22 @@ struct jz4780_dma_chan { unsigned int curr_hwdesc; }; +struct jz4780_dma_soc_data { + unsigned int nb_channels; + unsigned int transfer_ord_max; + unsigned long flags; +}; + struct jz4780_dma_dev { struct dma_device dma_device; - void __iomem *base; + void __iomem *chn_base; + void __iomem *ctrl_base; struct clk *clk; unsigned int irq; + const struct jz4780_dma_soc_data *soc_data; uint32_t chan_reserved; - struct jz4780_dma_chan chan[JZ_DMA_NR_CHANNELS]; + struct jz4780_dma_chan chan[]; }; struct jz4780_dma_filter_data { @@ -169,16 +183,51 @@ static inline struct jz4780_dma_dev *jz4780_dma_chan_parent( dma_device); } -static inline uint32_t jz4780_dma_readl(struct jz4780_dma_dev *jzdma, +static inline uint32_t jz4780_dma_chn_readl(struct jz4780_dma_dev *jzdma, + unsigned int chn, unsigned int reg) +{ + return readl(jzdma->chn_base + reg + JZ_DMA_REG_CHAN(chn)); +} + +static inline void jz4780_dma_chn_writel(struct jz4780_dma_dev *jzdma, + unsigned int chn, unsigned int reg, uint32_t val) +{ + writel(val, jzdma->chn_base + reg + JZ_DMA_REG_CHAN(chn)); +} + +static inline uint32_t jz4780_dma_ctrl_readl(struct jz4780_dma_dev *jzdma, unsigned int reg) { - return readl(jzdma->base + reg); + return readl(jzdma->ctrl_base + reg); } -static inline void jz4780_dma_writel(struct jz4780_dma_dev *jzdma, +static inline void jz4780_dma_ctrl_writel(struct jz4780_dma_dev *jzdma, unsigned int reg, uint32_t val) { - writel(val, jzdma->base + reg); + writel(val, jzdma->ctrl_base + reg); +} + +static inline void jz4780_dma_chan_enable(struct jz4780_dma_dev *jzdma, + unsigned int chn) +{ + if (jzdma->soc_data->flags & JZ_SOC_DATA_PER_CHAN_PM) { + unsigned int reg; + + if (jzdma->soc_data->flags & JZ_SOC_DATA_NO_DCKES_DCKEC) + reg = JZ_DMA_REG_DCKE; + else + reg = JZ_DMA_REG_DCKES; + + jz4780_dma_ctrl_writel(jzdma, reg, BIT(chn)); + } +} + +static inline void jz4780_dma_chan_disable(struct jz4780_dma_dev *jzdma, + unsigned int chn) +{ + if ((jzdma->soc_data->flags & JZ_SOC_DATA_PER_CHAN_PM) && + !(jzdma->soc_data->flags & JZ_SOC_DATA_NO_DCKES_DCKEC)) + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DCKEC, BIT(chn)); } static struct jz4780_dma_desc *jz4780_dma_desc_alloc( @@ -215,8 +264,10 @@ static void jz4780_dma_desc_free(struct virt_dma_desc *vdesc) kfree(desc); } -static uint32_t jz4780_dma_transfer_size(unsigned long val, uint32_t *shift) +static uint32_t jz4780_dma_transfer_size(struct jz4780_dma_chan *jzchan, + unsigned long val, uint32_t *shift) { + struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan); int ord = ffs(val) - 1; /* @@ -228,8 +279,8 @@ static uint32_t jz4780_dma_transfer_size(unsigned long val, uint32_t *shift) */ if (ord == 3) ord = 2; - else if (ord > 7) - ord = 7; + else if (ord > jzdma->soc_data->transfer_ord_max) + ord = jzdma->soc_data->transfer_ord_max; *shift = ord; @@ -262,7 +313,6 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan, desc->dcm = JZ_DMA_DCM_SAI; desc->dsa = addr; desc->dta = config->dst_addr; - desc->drt = jzchan->transfer_type; width = config->dst_addr_width; maxburst = config->dst_maxburst; @@ -270,7 +320,6 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan, desc->dcm = JZ_DMA_DCM_DAI; desc->dsa = config->src_addr; desc->dta = addr; - desc->drt = jzchan->transfer_type; width = config->src_addr_width; maxburst = config->src_maxburst; @@ -283,7 +332,7 @@ static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan, * divisible by the transfer size, and we must not use more than the * maximum burst specified by the user. */ - tsz = jz4780_dma_transfer_size(addr | len | (width * maxburst), + tsz = jz4780_dma_transfer_size(jzchan, addr | len | (width * maxburst), &jzchan->transfer_shift); switch (width) { @@ -412,12 +461,13 @@ static struct dma_async_tx_descriptor *jz4780_dma_prep_dma_memcpy( if (!desc) return NULL; - tsz = jz4780_dma_transfer_size(dest | src | len, + tsz = jz4780_dma_transfer_size(jzchan, dest | src | len, &jzchan->transfer_shift); + jzchan->transfer_type = JZ_DMA_DRT_AUTO; + desc->desc[0].dsa = src; desc->desc[0].dta = dest; - desc->desc[0].drt = JZ_DMA_DRT_AUTO; desc->desc[0].dcm = JZ_DMA_DCM_TIE | JZ_DMA_DCM_SAI | JZ_DMA_DCM_DAI | tsz << JZ_DMA_DCM_TSZ_SHIFT | JZ_DMA_WIDTH_32_BIT << JZ_DMA_DCM_SP_SHIFT | @@ -472,18 +522,34 @@ static void jz4780_dma_begin(struct jz4780_dma_chan *jzchan) (jzchan->curr_hwdesc + 1) % jzchan->desc->count; } - /* Use 8-word descriptors. */ - jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), JZ_DMA_DCS_DES8); + /* Enable the channel's clock. */ + jz4780_dma_chan_enable(jzdma, jzchan->id); + + /* Use 4-word descriptors. */ + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0); + + /* Set transfer type. */ + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DRT, + jzchan->transfer_type); + + /* + * Set the transfer count. This is redundant for a descriptor-driven + * transfer. However, there can be a delay between the transfer start + * time and when DTCn reg contains the new transfer count. Setting + * it explicitly ensures residue is computed correctly at all times. + */ + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DTC, + jzchan->desc->desc[jzchan->curr_hwdesc].dtc); /* Write descriptor address and initiate descriptor fetch. */ desc_phys = jzchan->desc->desc_phys + (jzchan->curr_hwdesc * sizeof(*jzchan->desc->desc)); - jz4780_dma_writel(jzdma, JZ_DMA_REG_DDA(jzchan->id), desc_phys); - jz4780_dma_writel(jzdma, JZ_DMA_REG_DDRS, BIT(jzchan->id)); + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DDA, desc_phys); + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DDRS, BIT(jzchan->id)); /* Enable the channel. */ - jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), - JZ_DMA_DCS_DES8 | JZ_DMA_DCS_CTE); + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, + JZ_DMA_DCS_CTE); } static void jz4780_dma_issue_pending(struct dma_chan *chan) @@ -509,12 +575,14 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan) spin_lock_irqsave(&jzchan->vchan.lock, flags); /* Clear the DMA status and stop the transfer. */ - jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0); + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0); if (jzchan->desc) { vchan_terminate_vdesc(&jzchan->desc->vdesc); jzchan->desc = NULL; } + jz4780_dma_chan_disable(jzdma, jzchan->id); + vchan_get_all_descriptors(&jzchan->vchan, &head); spin_unlock_irqrestore(&jzchan->vchan.lock, flags); @@ -526,8 +594,10 @@ static int jz4780_dma_terminate_all(struct dma_chan *chan) static void jz4780_dma_synchronize(struct dma_chan *chan) { struct jz4780_dma_chan *jzchan = to_jz4780_dma_chan(chan); + struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan); vchan_synchronize(&jzchan->vchan); + jz4780_dma_chan_disable(jzdma, jzchan->id); } static int jz4780_dma_config(struct dma_chan *chan, @@ -549,21 +619,17 @@ static size_t jz4780_dma_desc_residue(struct jz4780_dma_chan *jzchan, struct jz4780_dma_desc *desc, unsigned int next_sg) { struct jz4780_dma_dev *jzdma = jz4780_dma_chan_parent(jzchan); - unsigned int residue, count; + unsigned int count = 0; unsigned int i; - residue = 0; - for (i = next_sg; i < desc->count; i++) - residue += desc->desc[i].dtc << jzchan->transfer_shift; + count += desc->desc[i].dtc & GENMASK(23, 0); - if (next_sg != 0) { - count = jz4780_dma_readl(jzdma, - JZ_DMA_REG_DTC(jzchan->id)); - residue += count << jzchan->transfer_shift; - } + if (next_sg != 0) + count += jz4780_dma_chn_readl(jzdma, jzchan->id, + JZ_DMA_REG_DTC); - return residue; + return count << jzchan->transfer_shift; } static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan, @@ -573,6 +639,7 @@ static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan, struct virt_dma_desc *vdesc; enum dma_status status; unsigned long flags; + unsigned long residue = 0; status = dma_cookie_status(chan, cookie, txstate); if ((status == DMA_COMPLETE) || (txstate == NULL)) @@ -583,13 +650,13 @@ static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan, vdesc = vchan_find_desc(&jzchan->vchan, cookie); if (vdesc) { /* On the issued list, so hasn't been processed yet */ - txstate->residue = jz4780_dma_desc_residue(jzchan, + residue = jz4780_dma_desc_residue(jzchan, to_jz4780_dma_desc(vdesc), 0); } else if (cookie == jzchan->desc->vdesc.tx.cookie) { - txstate->residue = jz4780_dma_desc_residue(jzchan, jzchan->desc, - (jzchan->curr_hwdesc + 1) % jzchan->desc->count); - } else - txstate->residue = 0; + residue = jz4780_dma_desc_residue(jzchan, jzchan->desc, + jzchan->curr_hwdesc + 1); + } + dma_set_residue(txstate, residue); if (vdesc && jzchan->desc && vdesc == &jzchan->desc->vdesc && jzchan->desc->status & (JZ_DMA_DCS_AR | JZ_DMA_DCS_HLT)) @@ -606,8 +673,8 @@ static void jz4780_dma_chan_irq(struct jz4780_dma_dev *jzdma, spin_lock(&jzchan->vchan.lock); - dcs = jz4780_dma_readl(jzdma, JZ_DMA_REG_DCS(jzchan->id)); - jz4780_dma_writel(jzdma, JZ_DMA_REG_DCS(jzchan->id), 0); + dcs = jz4780_dma_chn_readl(jzdma, jzchan->id, JZ_DMA_REG_DCS); + jz4780_dma_chn_writel(jzdma, jzchan->id, JZ_DMA_REG_DCS, 0); if (dcs & JZ_DMA_DCS_AR) { dev_warn(&jzchan->vchan.chan.dev->device, @@ -646,9 +713,9 @@ static irqreturn_t jz4780_dma_irq_handler(int irq, void *data) uint32_t pending, dmac; int i; - pending = jz4780_dma_readl(jzdma, JZ_DMA_REG_DIRQP); + pending = jz4780_dma_ctrl_readl(jzdma, JZ_DMA_REG_DIRQP); - for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) { + for (i = 0; i < jzdma->soc_data->nb_channels; i++) { if (!(pending & (1<<i))) continue; @@ -656,12 +723,12 @@ static irqreturn_t jz4780_dma_irq_handler(int irq, void *data) } /* Clear halt and address error status of all channels. */ - dmac = jz4780_dma_readl(jzdma, JZ_DMA_REG_DMAC); + dmac = jz4780_dma_ctrl_readl(jzdma, JZ_DMA_REG_DMAC); dmac &= ~(JZ_DMA_DMAC_HLT | JZ_DMA_DMAC_AR); - jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC, dmac); + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, dmac); /* Clear interrupt pending status. */ - jz4780_dma_writel(jzdma, JZ_DMA_REG_DIRQP, 0); + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DIRQP, 0); return IRQ_HANDLED; } @@ -728,7 +795,7 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec, data.channel = dma_spec->args[1]; if (data.channel > -1) { - if (data.channel >= JZ_DMA_NR_CHANNELS) { + if (data.channel >= jzdma->soc_data->nb_channels) { dev_err(jzdma->dma_device.dev, "device requested non-existent channel %u\n", data.channel); @@ -755,16 +822,29 @@ static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec, static int jz4780_dma_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + const struct jz4780_dma_soc_data *soc_data; struct jz4780_dma_dev *jzdma; struct jz4780_dma_chan *jzchan; struct dma_device *dd; struct resource *res; int i, ret; - jzdma = devm_kzalloc(dev, sizeof(*jzdma), GFP_KERNEL); + if (!dev->of_node) { + dev_err(dev, "This driver must be probed from devicetree\n"); + return -EINVAL; + } + + soc_data = device_get_match_data(dev); + if (!soc_data) + return -EINVAL; + + jzdma = devm_kzalloc(dev, sizeof(*jzdma) + + sizeof(*jzdma->chan) * soc_data->nb_channels, + GFP_KERNEL); if (!jzdma) return -ENOMEM; + jzdma->soc_data = soc_data; platform_set_drvdata(pdev, jzdma); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -773,9 +853,26 @@ static int jz4780_dma_probe(struct platform_device *pdev) return -EINVAL; } - jzdma->base = devm_ioremap_resource(dev, res); - if (IS_ERR(jzdma->base)) - return PTR_ERR(jzdma->base); + jzdma->chn_base = devm_ioremap_resource(dev, res); + if (IS_ERR(jzdma->chn_base)) + return PTR_ERR(jzdma->chn_base); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res) { + jzdma->ctrl_base = devm_ioremap_resource(dev, res); + if (IS_ERR(jzdma->ctrl_base)) + return PTR_ERR(jzdma->ctrl_base); + } else if (soc_data->flags & JZ_SOC_DATA_ALLOW_LEGACY_DT) { + /* + * On JZ4780, if the second memory resource was not supplied, + * assume we're using an old devicetree, and calculate the + * offset to the control registers. + */ + jzdma->ctrl_base = jzdma->chn_base + JZ4780_DMA_CTRL_OFFSET; + } else { + dev_err(dev, "failed to get I/O memory\n"); + return -EINVAL; + } ret = platform_get_irq(pdev, 0); if (ret < 0) { @@ -833,13 +930,15 @@ static int jz4780_dma_probe(struct platform_device *pdev) * Also set the FMSC bit - it increases MSC performance, so it makes * little sense not to enable it. */ - jz4780_dma_writel(jzdma, JZ_DMA_REG_DMAC, - JZ_DMA_DMAC_DMAE | JZ_DMA_DMAC_FMSC); - jz4780_dma_writel(jzdma, JZ_DMA_REG_DMACP, 0); + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMAC, JZ_DMA_DMAC_DMAE | + JZ_DMA_DMAC_FAIC | JZ_DMA_DMAC_FMSC); + + if (soc_data->flags & JZ_SOC_DATA_PROGRAMMABLE_DMA) + jz4780_dma_ctrl_writel(jzdma, JZ_DMA_REG_DMACP, 0); INIT_LIST_HEAD(&dd->channels); - for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) { + for (i = 0; i < soc_data->nb_channels; i++) { jzchan = &jzdma->chan[i]; jzchan->id = i; @@ -847,7 +946,7 @@ static int jz4780_dma_probe(struct platform_device *pdev) jzchan->vchan.desc_free = jz4780_dma_desc_free; } - ret = dma_async_device_register(dd); + ret = dmaenginem_async_device_register(dd); if (ret) { dev_err(dev, "failed to register device\n"); goto err_disable_clk; @@ -858,15 +957,12 @@ static int jz4780_dma_probe(struct platform_device *pdev) jzdma); if (ret) { dev_err(dev, "failed to register OF DMA controller\n"); - goto err_unregister_dev; + goto err_disable_clk; } dev_info(dev, "JZ4780 DMA controller initialised\n"); return 0; -err_unregister_dev: - dma_async_device_unregister(dd); - err_disable_clk: clk_disable_unprepare(jzdma->clk); @@ -884,15 +980,40 @@ static int jz4780_dma_remove(struct platform_device *pdev) free_irq(jzdma->irq, jzdma); - for (i = 0; i < JZ_DMA_NR_CHANNELS; i++) + for (i = 0; i < jzdma->soc_data->nb_channels; i++) tasklet_kill(&jzdma->chan[i].vchan.task); - dma_async_device_unregister(&jzdma->dma_device); return 0; } +static const struct jz4780_dma_soc_data jz4740_dma_soc_data = { + .nb_channels = 6, + .transfer_ord_max = 5, +}; + +static const struct jz4780_dma_soc_data jz4725b_dma_soc_data = { + .nb_channels = 6, + .transfer_ord_max = 5, + .flags = JZ_SOC_DATA_PER_CHAN_PM | JZ_SOC_DATA_NO_DCKES_DCKEC, +}; + +static const struct jz4780_dma_soc_data jz4770_dma_soc_data = { + .nb_channels = 6, + .transfer_ord_max = 6, + .flags = JZ_SOC_DATA_PER_CHAN_PM, +}; + +static const struct jz4780_dma_soc_data jz4780_dma_soc_data = { + .nb_channels = 32, + .transfer_ord_max = 7, + .flags = JZ_SOC_DATA_ALLOW_LEGACY_DT | JZ_SOC_DATA_PROGRAMMABLE_DMA, +}; + static const struct of_device_id jz4780_dma_dt_match[] = { - { .compatible = "ingenic,jz4780-dma", .data = NULL }, + { .compatible = "ingenic,jz4740-dma", .data = &jz4740_dma_soc_data }, + { .compatible = "ingenic,jz4725b-dma", .data = &jz4725b_dma_soc_data }, + { .compatible = "ingenic,jz4770-dma", .data = &jz4770_dma_soc_data }, + { .compatible = "ingenic,jz4780-dma", .data = &jz4780_dma_soc_data }, {}, }; MODULE_DEVICE_TABLE(of, jz4780_dma_dt_match); diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c index c4eb55e3011c..b2ac1d2c5b86 100644 --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -934,7 +934,7 @@ static int dw_probe(struct platform_device *pdev) pm_runtime_put(chip->dev); - ret = dma_async_device_register(&dw->dma); + ret = dmaenginem_async_device_register(&dw->dma); if (ret) goto err_pm_disable; @@ -977,8 +977,6 @@ static int dw_remove(struct platform_device *pdev) tasklet_kill(&chan->vc.task); } - dma_async_device_unregister(&dw->dma); - return 0; } diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c index f43e6dafe446..d0c3e50b39fb 100644 --- a/drivers/dma/dw/core.c +++ b/drivers/dma/dw/core.c @@ -886,12 +886,7 @@ static int dwc_config(struct dma_chan *chan, struct dma_slave_config *sconfig) */ u32 s = dw->pdata->is_idma32 ? 1 : 2; - /* Check if chan will be configured for slave transfers */ - if (!is_slave_direction(sconfig->direction)) - return -EINVAL; - memcpy(&dwc->dma_sconfig, sconfig, sizeof(*sconfig)); - dwc->direction = sconfig->direction; sc->src_maxburst = sc->src_maxburst > 1 ? fls(sc->src_maxburst) - s : 0; sc->dst_maxburst = sc->dst_maxburst > 1 ? fls(sc->dst_maxburst) - s : 0; diff --git a/drivers/dma/dw/platform.c b/drivers/dma/dw/platform.c index f62dd0944908..f01b2c173fa6 100644 --- a/drivers/dma/dw/platform.c +++ b/drivers/dma/dw/platform.c @@ -284,6 +284,8 @@ MODULE_DEVICE_TABLE(of, dw_dma_of_id_table); #ifdef CONFIG_ACPI static const struct acpi_device_id dw_dma_acpi_id_table[] = { { "INTL9C60", 0 }, + { "80862286", 0 }, + { "808622C0", 0 }, { } }; MODULE_DEVICE_TABLE(acpi, dw_dma_acpi_id_table); diff --git a/drivers/dma/ep93xx_dma.c b/drivers/dma/ep93xx_dma.c index a15592383d4e..f674eb5fbbef 100644 --- a/drivers/dma/ep93xx_dma.c +++ b/drivers/dma/ep93xx_dma.c @@ -109,6 +109,9 @@ #define DMA_MAX_CHAN_DESCRIPTORS 32 struct ep93xx_dma_engine; +static int ep93xx_dma_slave_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *config); /** * struct ep93xx_dma_desc - EP93xx specific transaction descriptor @@ -180,6 +183,7 @@ struct ep93xx_dma_chan { struct list_head free_list; u32 runtime_addr; u32 runtime_ctrl; + struct dma_slave_config slave_config; }; /** @@ -1051,6 +1055,8 @@ ep93xx_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, return NULL; } + ep93xx_dma_slave_config_write(chan, dir, &edmac->slave_config); + first = NULL; for_each_sg(sgl, sg, sg_len, i) { size_t len = sg_dma_len(sg); @@ -1136,6 +1142,8 @@ ep93xx_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t dma_addr, return NULL; } + ep93xx_dma_slave_config_write(chan, dir, &edmac->slave_config); + /* Split the buffer into period size chunks */ first = NULL; for (offset = 0; offset < buf_len; offset += period_len) { @@ -1227,6 +1235,17 @@ static int ep93xx_dma_slave_config(struct dma_chan *chan, struct dma_slave_config *config) { struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan); + + memcpy(&edmac->slave_config, config, sizeof(*config)); + + return 0; +} + +static int ep93xx_dma_slave_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *config) +{ + struct ep93xx_dma_chan *edmac = to_ep93xx_dma_chan(chan); enum dma_slave_buswidth width; unsigned long flags; u32 addr, ctrl; @@ -1234,7 +1253,7 @@ static int ep93xx_dma_slave_config(struct dma_chan *chan, if (!edmac->edma->m2m) return -EINVAL; - switch (config->direction) { + switch (dir) { case DMA_DEV_TO_MEM: width = config->src_addr_width; addr = config->src_addr; diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c new file mode 100644 index 000000000000..8876c4c1bb2c --- /dev/null +++ b/drivers/dma/fsl-edma-common.c @@ -0,0 +1,626 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (c) 2013-2014 Freescale Semiconductor, Inc +// Copyright (c) 2017 Sysam, Angelo Dureghello <angelo@sysam.it> + +#include <linux/dmapool.h> +#include <linux/module.h> +#include <linux/slab.h> + +#include "fsl-edma-common.h" + +#define EDMA_CR 0x00 +#define EDMA_ES 0x04 +#define EDMA_ERQ 0x0C +#define EDMA_EEI 0x14 +#define EDMA_SERQ 0x1B +#define EDMA_CERQ 0x1A +#define EDMA_SEEI 0x19 +#define EDMA_CEEI 0x18 +#define EDMA_CINT 0x1F +#define EDMA_CERR 0x1E +#define EDMA_SSRT 0x1D +#define EDMA_CDNE 0x1C +#define EDMA_INTR 0x24 +#define EDMA_ERR 0x2C + +#define EDMA64_ERQH 0x08 +#define EDMA64_EEIH 0x10 +#define EDMA64_SERQ 0x18 +#define EDMA64_CERQ 0x19 +#define EDMA64_SEEI 0x1a +#define EDMA64_CEEI 0x1b +#define EDMA64_CINT 0x1c +#define EDMA64_CERR 0x1d +#define EDMA64_SSRT 0x1e +#define EDMA64_CDNE 0x1f +#define EDMA64_INTH 0x20 +#define EDMA64_INTL 0x24 +#define EDMA64_ERRH 0x28 +#define EDMA64_ERRL 0x2c + +#define EDMA_TCD 0x1000 + +static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan) +{ + struct edma_regs *regs = &fsl_chan->edma->regs; + u32 ch = fsl_chan->vchan.chan.chan_id; + + if (fsl_chan->edma->version == v1) { + edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), regs->seei); + edma_writeb(fsl_chan->edma, ch, regs->serq); + } else { + /* ColdFire is big endian, and accesses natively + * big endian I/O peripherals + */ + iowrite8(EDMA_SEEI_SEEI(ch), regs->seei); + iowrite8(ch, regs->serq); + } +} + +void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan) +{ + struct edma_regs *regs = &fsl_chan->edma->regs; + u32 ch = fsl_chan->vchan.chan.chan_id; + + if (fsl_chan->edma->version == v1) { + edma_writeb(fsl_chan->edma, ch, regs->cerq); + edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), regs->ceei); + } else { + /* ColdFire is big endian, and accesses natively + * big endian I/O peripherals + */ + iowrite8(ch, regs->cerq); + iowrite8(EDMA_CEEI_CEEI(ch), regs->ceei); + } +} +EXPORT_SYMBOL_GPL(fsl_edma_disable_request); + +void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, + unsigned int slot, bool enable) +{ + u32 ch = fsl_chan->vchan.chan.chan_id; + void __iomem *muxaddr; + unsigned int chans_per_mux, ch_off; + + chans_per_mux = fsl_chan->edma->n_chans / DMAMUX_NR; + ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux; + muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux]; + slot = EDMAMUX_CHCFG_SOURCE(slot); + + if (enable) + iowrite8(EDMAMUX_CHCFG_ENBL | slot, muxaddr + ch_off); + else + iowrite8(EDMAMUX_CHCFG_DIS, muxaddr + ch_off); +} +EXPORT_SYMBOL_GPL(fsl_edma_chan_mux); + +static unsigned int fsl_edma_get_tcd_attr(enum dma_slave_buswidth addr_width) +{ + switch (addr_width) { + case 1: + return EDMA_TCD_ATTR_SSIZE_8BIT | EDMA_TCD_ATTR_DSIZE_8BIT; + case 2: + return EDMA_TCD_ATTR_SSIZE_16BIT | EDMA_TCD_ATTR_DSIZE_16BIT; + case 4: + return EDMA_TCD_ATTR_SSIZE_32BIT | EDMA_TCD_ATTR_DSIZE_32BIT; + case 8: + return EDMA_TCD_ATTR_SSIZE_64BIT | EDMA_TCD_ATTR_DSIZE_64BIT; + default: + return EDMA_TCD_ATTR_SSIZE_32BIT | EDMA_TCD_ATTR_DSIZE_32BIT; + } +} + +void fsl_edma_free_desc(struct virt_dma_desc *vdesc) +{ + struct fsl_edma_desc *fsl_desc; + int i; + + fsl_desc = to_fsl_edma_desc(vdesc); + for (i = 0; i < fsl_desc->n_tcds; i++) + dma_pool_free(fsl_desc->echan->tcd_pool, fsl_desc->tcd[i].vtcd, + fsl_desc->tcd[i].ptcd); + kfree(fsl_desc); +} +EXPORT_SYMBOL_GPL(fsl_edma_free_desc); + +int fsl_edma_terminate_all(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + fsl_edma_disable_request(fsl_chan); + fsl_chan->edesc = NULL; + fsl_chan->idle = true; + vchan_get_all_descriptors(&fsl_chan->vchan, &head); + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + vchan_dma_desc_free_list(&fsl_chan->vchan, &head); + return 0; +} +EXPORT_SYMBOL_GPL(fsl_edma_terminate_all); + +int fsl_edma_pause(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + unsigned long flags; + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + if (fsl_chan->edesc) { + fsl_edma_disable_request(fsl_chan); + fsl_chan->status = DMA_PAUSED; + fsl_chan->idle = true; + } + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(fsl_edma_pause); + +int fsl_edma_resume(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + unsigned long flags; + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + if (fsl_chan->edesc) { + fsl_edma_enable_request(fsl_chan); + fsl_chan->status = DMA_IN_PROGRESS; + fsl_chan->idle = false; + } + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + return 0; +} +EXPORT_SYMBOL_GPL(fsl_edma_resume); + +int fsl_edma_slave_config(struct dma_chan *chan, + struct dma_slave_config *cfg) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + + memcpy(&fsl_chan->cfg, cfg, sizeof(*cfg)); + + return 0; +} +EXPORT_SYMBOL_GPL(fsl_edma_slave_config); + +static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan, + struct virt_dma_desc *vdesc, bool in_progress) +{ + struct fsl_edma_desc *edesc = fsl_chan->edesc; + struct edma_regs *regs = &fsl_chan->edma->regs; + u32 ch = fsl_chan->vchan.chan.chan_id; + enum dma_transfer_direction dir = edesc->dirn; + dma_addr_t cur_addr, dma_addr; + size_t len, size; + int i; + + /* calculate the total size in this desc */ + for (len = i = 0; i < fsl_chan->edesc->n_tcds; i++) + len += le32_to_cpu(edesc->tcd[i].vtcd->nbytes) + * le16_to_cpu(edesc->tcd[i].vtcd->biter); + + if (!in_progress) + return len; + + if (dir == DMA_MEM_TO_DEV) + cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].saddr); + else + cur_addr = edma_readl(fsl_chan->edma, ®s->tcd[ch].daddr); + + /* figure out the finished and calculate the residue */ + for (i = 0; i < fsl_chan->edesc->n_tcds; i++) { + size = le32_to_cpu(edesc->tcd[i].vtcd->nbytes) + * le16_to_cpu(edesc->tcd[i].vtcd->biter); + if (dir == DMA_MEM_TO_DEV) + dma_addr = le32_to_cpu(edesc->tcd[i].vtcd->saddr); + else + dma_addr = le32_to_cpu(edesc->tcd[i].vtcd->daddr); + + len -= size; + if (cur_addr >= dma_addr && cur_addr < dma_addr + size) { + len += dma_addr + size - cur_addr; + break; + } + } + + return len; +} + +enum dma_status fsl_edma_tx_status(struct dma_chan *chan, + dma_cookie_t cookie, struct dma_tx_state *txstate) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + struct virt_dma_desc *vdesc; + enum dma_status status; + unsigned long flags; + + status = dma_cookie_status(chan, cookie, txstate); + if (status == DMA_COMPLETE) + return status; + + if (!txstate) + return fsl_chan->status; + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + vdesc = vchan_find_desc(&fsl_chan->vchan, cookie); + if (fsl_chan->edesc && cookie == fsl_chan->edesc->vdesc.tx.cookie) + txstate->residue = + fsl_edma_desc_residue(fsl_chan, vdesc, true); + else if (vdesc) + txstate->residue = + fsl_edma_desc_residue(fsl_chan, vdesc, false); + else + txstate->residue = 0; + + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + + return fsl_chan->status; +} +EXPORT_SYMBOL_GPL(fsl_edma_tx_status); + +static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan, + struct fsl_edma_hw_tcd *tcd) +{ + struct fsl_edma_engine *edma = fsl_chan->edma; + struct edma_regs *regs = &fsl_chan->edma->regs; + u32 ch = fsl_chan->vchan.chan.chan_id; + + /* + * TCD parameters are stored in struct fsl_edma_hw_tcd in little + * endian format. However, we need to load the TCD registers in + * big- or little-endian obeying the eDMA engine model endian. + */ + edma_writew(edma, 0, ®s->tcd[ch].csr); + edma_writel(edma, le32_to_cpu(tcd->saddr), ®s->tcd[ch].saddr); + edma_writel(edma, le32_to_cpu(tcd->daddr), ®s->tcd[ch].daddr); + + edma_writew(edma, le16_to_cpu(tcd->attr), ®s->tcd[ch].attr); + edma_writew(edma, le16_to_cpu(tcd->soff), ®s->tcd[ch].soff); + + edma_writel(edma, le32_to_cpu(tcd->nbytes), ®s->tcd[ch].nbytes); + edma_writel(edma, le32_to_cpu(tcd->slast), ®s->tcd[ch].slast); + + edma_writew(edma, le16_to_cpu(tcd->citer), ®s->tcd[ch].citer); + edma_writew(edma, le16_to_cpu(tcd->biter), ®s->tcd[ch].biter); + edma_writew(edma, le16_to_cpu(tcd->doff), ®s->tcd[ch].doff); + + edma_writel(edma, le32_to_cpu(tcd->dlast_sga), + ®s->tcd[ch].dlast_sga); + + edma_writew(edma, le16_to_cpu(tcd->csr), ®s->tcd[ch].csr); +} + +static inline +void fsl_edma_fill_tcd(struct fsl_edma_hw_tcd *tcd, u32 src, u32 dst, + u16 attr, u16 soff, u32 nbytes, u32 slast, u16 citer, + u16 biter, u16 doff, u32 dlast_sga, bool major_int, + bool disable_req, bool enable_sg) +{ + u16 csr = 0; + + /* + * eDMA hardware SGs require the TCDs to be stored in little + * endian format irrespective of the register endian model. + * So we put the value in little endian in memory, waiting + * for fsl_edma_set_tcd_regs doing the swap. + */ + tcd->saddr = cpu_to_le32(src); + tcd->daddr = cpu_to_le32(dst); + + tcd->attr = cpu_to_le16(attr); + + tcd->soff = cpu_to_le16(soff); + + tcd->nbytes = cpu_to_le32(nbytes); + tcd->slast = cpu_to_le32(slast); + + tcd->citer = cpu_to_le16(EDMA_TCD_CITER_CITER(citer)); + tcd->doff = cpu_to_le16(doff); + + tcd->dlast_sga = cpu_to_le32(dlast_sga); + + tcd->biter = cpu_to_le16(EDMA_TCD_BITER_BITER(biter)); + if (major_int) + csr |= EDMA_TCD_CSR_INT_MAJOR; + + if (disable_req) + csr |= EDMA_TCD_CSR_D_REQ; + + if (enable_sg) + csr |= EDMA_TCD_CSR_E_SG; + + tcd->csr = cpu_to_le16(csr); +} + +static struct fsl_edma_desc *fsl_edma_alloc_desc(struct fsl_edma_chan *fsl_chan, + int sg_len) +{ + struct fsl_edma_desc *fsl_desc; + int i; + + fsl_desc = kzalloc(sizeof(*fsl_desc) + + sizeof(struct fsl_edma_sw_tcd) * + sg_len, GFP_NOWAIT); + if (!fsl_desc) + return NULL; + + fsl_desc->echan = fsl_chan; + fsl_desc->n_tcds = sg_len; + for (i = 0; i < sg_len; i++) { + fsl_desc->tcd[i].vtcd = dma_pool_alloc(fsl_chan->tcd_pool, + GFP_NOWAIT, &fsl_desc->tcd[i].ptcd); + if (!fsl_desc->tcd[i].vtcd) + goto err; + } + return fsl_desc; + +err: + while (--i >= 0) + dma_pool_free(fsl_chan->tcd_pool, fsl_desc->tcd[i].vtcd, + fsl_desc->tcd[i].ptcd); + kfree(fsl_desc); + return NULL; +} + +struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic( + struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, + size_t period_len, enum dma_transfer_direction direction, + unsigned long flags) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + struct fsl_edma_desc *fsl_desc; + dma_addr_t dma_buf_next; + int sg_len, i; + u32 src_addr, dst_addr, last_sg, nbytes; + u16 soff, doff, iter; + + if (!is_slave_direction(direction)) + return NULL; + + sg_len = buf_len / period_len; + fsl_desc = fsl_edma_alloc_desc(fsl_chan, sg_len); + if (!fsl_desc) + return NULL; + fsl_desc->iscyclic = true; + fsl_desc->dirn = direction; + + dma_buf_next = dma_addr; + if (direction == DMA_MEM_TO_DEV) { + fsl_chan->attr = + fsl_edma_get_tcd_attr(fsl_chan->cfg.dst_addr_width); + nbytes = fsl_chan->cfg.dst_addr_width * + fsl_chan->cfg.dst_maxburst; + } else { + fsl_chan->attr = + fsl_edma_get_tcd_attr(fsl_chan->cfg.src_addr_width); + nbytes = fsl_chan->cfg.src_addr_width * + fsl_chan->cfg.src_maxburst; + } + + iter = period_len / nbytes; + + for (i = 0; i < sg_len; i++) { + if (dma_buf_next >= dma_addr + buf_len) + dma_buf_next = dma_addr; + + /* get next sg's physical address */ + last_sg = fsl_desc->tcd[(i + 1) % sg_len].ptcd; + + if (direction == DMA_MEM_TO_DEV) { + src_addr = dma_buf_next; + dst_addr = fsl_chan->cfg.dst_addr; + soff = fsl_chan->cfg.dst_addr_width; + doff = 0; + } else { + src_addr = fsl_chan->cfg.src_addr; + dst_addr = dma_buf_next; + soff = 0; + doff = fsl_chan->cfg.src_addr_width; + } + + fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, dst_addr, + fsl_chan->attr, soff, nbytes, 0, iter, + iter, doff, last_sg, true, false, true); + dma_buf_next += period_len; + } + + return vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc, flags); +} +EXPORT_SYMBOL_GPL(fsl_edma_prep_dma_cyclic); + +struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( + struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction direction, + unsigned long flags, void *context) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + struct fsl_edma_desc *fsl_desc; + struct scatterlist *sg; + u32 src_addr, dst_addr, last_sg, nbytes; + u16 soff, doff, iter; + int i; + + if (!is_slave_direction(direction)) + return NULL; + + fsl_desc = fsl_edma_alloc_desc(fsl_chan, sg_len); + if (!fsl_desc) + return NULL; + fsl_desc->iscyclic = false; + fsl_desc->dirn = direction; + + if (direction == DMA_MEM_TO_DEV) { + fsl_chan->attr = + fsl_edma_get_tcd_attr(fsl_chan->cfg.dst_addr_width); + nbytes = fsl_chan->cfg.dst_addr_width * + fsl_chan->cfg.dst_maxburst; + } else { + fsl_chan->attr = + fsl_edma_get_tcd_attr(fsl_chan->cfg.src_addr_width); + nbytes = fsl_chan->cfg.src_addr_width * + fsl_chan->cfg.src_maxburst; + } + + for_each_sg(sgl, sg, sg_len, i) { + /* get next sg's physical address */ + last_sg = fsl_desc->tcd[(i + 1) % sg_len].ptcd; + + if (direction == DMA_MEM_TO_DEV) { + src_addr = sg_dma_address(sg); + dst_addr = fsl_chan->cfg.dst_addr; + soff = fsl_chan->cfg.dst_addr_width; + doff = 0; + } else { + src_addr = fsl_chan->cfg.src_addr; + dst_addr = sg_dma_address(sg); + soff = 0; + doff = fsl_chan->cfg.src_addr_width; + } + + iter = sg_dma_len(sg) / nbytes; + if (i < sg_len - 1) { + last_sg = fsl_desc->tcd[(i + 1)].ptcd; + fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, + dst_addr, fsl_chan->attr, soff, + nbytes, 0, iter, iter, doff, last_sg, + false, false, true); + } else { + last_sg = 0; + fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, + dst_addr, fsl_chan->attr, soff, + nbytes, 0, iter, iter, doff, last_sg, + true, true, false); + } + } + + return vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc, flags); +} +EXPORT_SYMBOL_GPL(fsl_edma_prep_slave_sg); + +void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan) +{ + struct virt_dma_desc *vdesc; + + vdesc = vchan_next_desc(&fsl_chan->vchan); + if (!vdesc) + return; + fsl_chan->edesc = to_fsl_edma_desc(vdesc); + fsl_edma_set_tcd_regs(fsl_chan, fsl_chan->edesc->tcd[0].vtcd); + fsl_edma_enable_request(fsl_chan); + fsl_chan->status = DMA_IN_PROGRESS; + fsl_chan->idle = false; +} +EXPORT_SYMBOL_GPL(fsl_edma_xfer_desc); + +void fsl_edma_issue_pending(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + unsigned long flags; + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + + if (unlikely(fsl_chan->pm_state != RUNNING)) { + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + /* cannot submit due to suspend */ + return; + } + + if (vchan_issue_pending(&fsl_chan->vchan) && !fsl_chan->edesc) + fsl_edma_xfer_desc(fsl_chan); + + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); +} +EXPORT_SYMBOL_GPL(fsl_edma_issue_pending); + +int fsl_edma_alloc_chan_resources(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + + fsl_chan->tcd_pool = dma_pool_create("tcd_pool", chan->device->dev, + sizeof(struct fsl_edma_hw_tcd), + 32, 0); + return 0; +} +EXPORT_SYMBOL_GPL(fsl_edma_alloc_chan_resources); + +void fsl_edma_free_chan_resources(struct dma_chan *chan) +{ + struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); + unsigned long flags; + LIST_HEAD(head); + + spin_lock_irqsave(&fsl_chan->vchan.lock, flags); + fsl_edma_disable_request(fsl_chan); + fsl_edma_chan_mux(fsl_chan, 0, false); + fsl_chan->edesc = NULL; + vchan_get_all_descriptors(&fsl_chan->vchan, &head); + spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); + + vchan_dma_desc_free_list(&fsl_chan->vchan, &head); + dma_pool_destroy(fsl_chan->tcd_pool); + fsl_chan->tcd_pool = NULL; +} +EXPORT_SYMBOL_GPL(fsl_edma_free_chan_resources); + +void fsl_edma_cleanup_vchan(struct dma_device *dmadev) +{ + struct fsl_edma_chan *chan, *_chan; + + list_for_each_entry_safe(chan, _chan, + &dmadev->channels, vchan.chan.device_node) { + list_del(&chan->vchan.chan.device_node); + tasklet_kill(&chan->vchan.task); + } +} +EXPORT_SYMBOL_GPL(fsl_edma_cleanup_vchan); + +/* + * On the 32 channels Vybrid/mpc577x edma version (here called "v1"), + * register offsets are different compared to ColdFire mcf5441x 64 channels + * edma (here called "v2"). + * + * This function sets up register offsets as per proper declared version + * so must be called in xxx_edma_probe() just after setting the + * edma "version" and "membase" appropriately. + */ +void fsl_edma_setup_regs(struct fsl_edma_engine *edma) +{ + edma->regs.cr = edma->membase + EDMA_CR; + edma->regs.es = edma->membase + EDMA_ES; + edma->regs.erql = edma->membase + EDMA_ERQ; + edma->regs.eeil = edma->membase + EDMA_EEI; + + edma->regs.serq = edma->membase + ((edma->version == v1) ? + EDMA_SERQ : EDMA64_SERQ); + edma->regs.cerq = edma->membase + ((edma->version == v1) ? + EDMA_CERQ : EDMA64_CERQ); + edma->regs.seei = edma->membase + ((edma->version == v1) ? + EDMA_SEEI : EDMA64_SEEI); + edma->regs.ceei = edma->membase + ((edma->version == v1) ? + EDMA_CEEI : EDMA64_CEEI); + edma->regs.cint = edma->membase + ((edma->version == v1) ? + EDMA_CINT : EDMA64_CINT); + edma->regs.cerr = edma->membase + ((edma->version == v1) ? + EDMA_CERR : EDMA64_CERR); + edma->regs.ssrt = edma->membase + ((edma->version == v1) ? + EDMA_SSRT : EDMA64_SSRT); + edma->regs.cdne = edma->membase + ((edma->version == v1) ? + EDMA_CDNE : EDMA64_CDNE); + edma->regs.intl = edma->membase + ((edma->version == v1) ? + EDMA_INTR : EDMA64_INTL); + edma->regs.errl = edma->membase + ((edma->version == v1) ? + EDMA_ERR : EDMA64_ERRL); + + if (edma->version == v2) { + edma->regs.erqh = edma->membase + EDMA64_ERQH; + edma->regs.eeih = edma->membase + EDMA64_EEIH; + edma->regs.errh = edma->membase + EDMA64_ERRH; + edma->regs.inth = edma->membase + EDMA64_INTH; + } + + edma->regs.tcd = edma->membase + EDMA_TCD; +} +EXPORT_SYMBOL_GPL(fsl_edma_setup_regs); + +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h new file mode 100644 index 000000000000..8917e8865959 --- /dev/null +++ b/drivers/dma/fsl-edma-common.h @@ -0,0 +1,233 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2013-2014 Freescale Semiconductor, Inc. + * Copyright 2018 Angelo Dureghello <angelo@sysam.it> + */ +#ifndef _FSL_EDMA_COMMON_H_ +#define _FSL_EDMA_COMMON_H_ + +#include "virt-dma.h" + +#define EDMA_CR_EDBG BIT(1) +#define EDMA_CR_ERCA BIT(2) +#define EDMA_CR_ERGA BIT(3) +#define EDMA_CR_HOE BIT(4) +#define EDMA_CR_HALT BIT(5) +#define EDMA_CR_CLM BIT(6) +#define EDMA_CR_EMLM BIT(7) +#define EDMA_CR_ECX BIT(16) +#define EDMA_CR_CX BIT(17) + +#define EDMA_SEEI_SEEI(x) ((x) & GENMASK(4, 0)) +#define EDMA_CEEI_CEEI(x) ((x) & GENMASK(4, 0)) +#define EDMA_CINT_CINT(x) ((x) & GENMASK(4, 0)) +#define EDMA_CERR_CERR(x) ((x) & GENMASK(4, 0)) + +#define EDMA_TCD_ATTR_DSIZE(x) (((x) & GENMASK(2, 0))) +#define EDMA_TCD_ATTR_DMOD(x) (((x) & GENMASK(4, 0)) << 3) +#define EDMA_TCD_ATTR_SSIZE(x) (((x) & GENMASK(2, 0)) << 8) +#define EDMA_TCD_ATTR_SMOD(x) (((x) & GENMASK(4, 0)) << 11) +#define EDMA_TCD_ATTR_DSIZE_8BIT 0 +#define EDMA_TCD_ATTR_DSIZE_16BIT BIT(0) +#define EDMA_TCD_ATTR_DSIZE_32BIT BIT(1) +#define EDMA_TCD_ATTR_DSIZE_64BIT (BIT(0) | BIT(1)) +#define EDMA_TCD_ATTR_DSIZE_32BYTE (BIT(3) | BIT(0)) +#define EDMA_TCD_ATTR_SSIZE_8BIT 0 +#define EDMA_TCD_ATTR_SSIZE_16BIT (EDMA_TCD_ATTR_DSIZE_16BIT << 8) +#define EDMA_TCD_ATTR_SSIZE_32BIT (EDMA_TCD_ATTR_DSIZE_32BIT << 8) +#define EDMA_TCD_ATTR_SSIZE_64BIT (EDMA_TCD_ATTR_DSIZE_64BIT << 8) +#define EDMA_TCD_ATTR_SSIZE_32BYTE (EDMA_TCD_ATTR_DSIZE_32BYTE << 8) + +#define EDMA_TCD_CITER_CITER(x) ((x) & GENMASK(14, 0)) +#define EDMA_TCD_BITER_BITER(x) ((x) & GENMASK(14, 0)) + +#define EDMA_TCD_CSR_START BIT(0) +#define EDMA_TCD_CSR_INT_MAJOR BIT(1) +#define EDMA_TCD_CSR_INT_HALF BIT(2) +#define EDMA_TCD_CSR_D_REQ BIT(3) +#define EDMA_TCD_CSR_E_SG BIT(4) +#define EDMA_TCD_CSR_E_LINK BIT(5) +#define EDMA_TCD_CSR_ACTIVE BIT(6) +#define EDMA_TCD_CSR_DONE BIT(7) + +#define EDMAMUX_CHCFG_DIS 0x0 +#define EDMAMUX_CHCFG_ENBL 0x80 +#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F) + +#define DMAMUX_NR 2 + +#define FSL_EDMA_BUSWIDTHS (BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ + BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \ + BIT(DMA_SLAVE_BUSWIDTH_8_BYTES)) +enum fsl_edma_pm_state { + RUNNING = 0, + SUSPENDED, +}; + +struct fsl_edma_hw_tcd { + __le32 saddr; + __le16 soff; + __le16 attr; + __le32 nbytes; + __le32 slast; + __le32 daddr; + __le16 doff; + __le16 citer; + __le32 dlast_sga; + __le16 csr; + __le16 biter; +}; + +/* + * These are iomem pointers, for both v32 and v64. + */ +struct edma_regs { + void __iomem *cr; + void __iomem *es; + void __iomem *erqh; + void __iomem *erql; /* aka erq on v32 */ + void __iomem *eeih; + void __iomem *eeil; /* aka eei on v32 */ + void __iomem *seei; + void __iomem *ceei; + void __iomem *serq; + void __iomem *cerq; + void __iomem *cint; + void __iomem *cerr; + void __iomem *ssrt; + void __iomem *cdne; + void __iomem *inth; + void __iomem *intl; + void __iomem *errh; + void __iomem *errl; + struct fsl_edma_hw_tcd __iomem *tcd; +}; + +struct fsl_edma_sw_tcd { + dma_addr_t ptcd; + struct fsl_edma_hw_tcd *vtcd; +}; + +struct fsl_edma_chan { + struct virt_dma_chan vchan; + enum dma_status status; + enum fsl_edma_pm_state pm_state; + bool idle; + u32 slave_id; + struct fsl_edma_engine *edma; + struct fsl_edma_desc *edesc; + struct dma_slave_config cfg; + u32 attr; + struct dma_pool *tcd_pool; +}; + +struct fsl_edma_desc { + struct virt_dma_desc vdesc; + struct fsl_edma_chan *echan; + bool iscyclic; + enum dma_transfer_direction dirn; + unsigned int n_tcds; + struct fsl_edma_sw_tcd tcd[]; +}; + +enum edma_version { + v1, /* 32ch, Vybdir, mpc57x, etc */ + v2, /* 64ch Coldfire */ +}; + +struct fsl_edma_engine { + struct dma_device dma_dev; + void __iomem *membase; + void __iomem *muxbase[DMAMUX_NR]; + struct clk *muxclk[DMAMUX_NR]; + struct mutex fsl_edma_mutex; + u32 n_chans; + int txirq; + int errirq; + bool big_endian; + enum edma_version version; + struct edma_regs regs; + struct fsl_edma_chan chans[]; +}; + +/* + * R/W functions for big- or little-endian registers: + * The eDMA controller's endian is independent of the CPU core's endian. + * For the big-endian IP module, the offset for 8-bit or 16-bit registers + * should also be swapped opposite to that in little-endian IP. + */ +static inline u32 edma_readl(struct fsl_edma_engine *edma, void __iomem *addr) +{ + if (edma->big_endian) + return ioread32be(addr); + else + return ioread32(addr); +} + +static inline void edma_writeb(struct fsl_edma_engine *edma, + u8 val, void __iomem *addr) +{ + /* swap the reg offset for these in big-endian mode */ + if (edma->big_endian) + iowrite8(val, (void __iomem *)((unsigned long)addr ^ 0x3)); + else + iowrite8(val, addr); +} + +static inline void edma_writew(struct fsl_edma_engine *edma, + u16 val, void __iomem *addr) +{ + /* swap the reg offset for these in big-endian mode */ + if (edma->big_endian) + iowrite16be(val, (void __iomem *)((unsigned long)addr ^ 0x2)); + else + iowrite16(val, addr); +} + +static inline void edma_writel(struct fsl_edma_engine *edma, + u32 val, void __iomem *addr) +{ + if (edma->big_endian) + iowrite32be(val, addr); + else + iowrite32(val, addr); +} + +static inline struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan) +{ + return container_of(chan, struct fsl_edma_chan, vchan.chan); +} + +static inline struct fsl_edma_desc *to_fsl_edma_desc(struct virt_dma_desc *vd) +{ + return container_of(vd, struct fsl_edma_desc, vdesc); +} + +void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan); +void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, + unsigned int slot, bool enable); +void fsl_edma_free_desc(struct virt_dma_desc *vdesc); +int fsl_edma_terminate_all(struct dma_chan *chan); +int fsl_edma_pause(struct dma_chan *chan); +int fsl_edma_resume(struct dma_chan *chan); +int fsl_edma_slave_config(struct dma_chan *chan, + struct dma_slave_config *cfg); +enum dma_status fsl_edma_tx_status(struct dma_chan *chan, + dma_cookie_t cookie, struct dma_tx_state *txstate); +struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic( + struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, + size_t period_len, enum dma_transfer_direction direction, + unsigned long flags); +struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( + struct dma_chan *chan, struct scatterlist *sgl, + unsigned int sg_len, enum dma_transfer_direction direction, + unsigned long flags, void *context); +void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan); +void fsl_edma_issue_pending(struct dma_chan *chan); +int fsl_edma_alloc_chan_resources(struct dma_chan *chan); +void fsl_edma_free_chan_resources(struct dma_chan *chan); +void fsl_edma_cleanup_vchan(struct dma_device *dmadev); +void fsl_edma_setup_regs(struct fsl_edma_engine *edma); + +#endif /* _FSL_EDMA_COMMON_H_ */ diff --git a/drivers/dma/fsl-edma.c b/drivers/dma/fsl-edma.c index c7568869284e..34d70112fcc9 100644 --- a/drivers/dma/fsl-edma.c +++ b/drivers/dma/fsl-edma.c @@ -13,671 +13,31 @@ * option) any later version. */ -#include <linux/init.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/clk.h> -#include <linux/dma-mapping.h> -#include <linux/dmapool.h> -#include <linux/slab.h> -#include <linux/spinlock.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_dma.h> -#include "virt-dma.h" - -#define EDMA_CR 0x00 -#define EDMA_ES 0x04 -#define EDMA_ERQ 0x0C -#define EDMA_EEI 0x14 -#define EDMA_SERQ 0x1B -#define EDMA_CERQ 0x1A -#define EDMA_SEEI 0x19 -#define EDMA_CEEI 0x18 -#define EDMA_CINT 0x1F -#define EDMA_CERR 0x1E -#define EDMA_SSRT 0x1D -#define EDMA_CDNE 0x1C -#define EDMA_INTR 0x24 -#define EDMA_ERR 0x2C - -#define EDMA_TCD_SADDR(x) (0x1000 + 32 * (x)) -#define EDMA_TCD_SOFF(x) (0x1004 + 32 * (x)) -#define EDMA_TCD_ATTR(x) (0x1006 + 32 * (x)) -#define EDMA_TCD_NBYTES(x) (0x1008 + 32 * (x)) -#define EDMA_TCD_SLAST(x) (0x100C + 32 * (x)) -#define EDMA_TCD_DADDR(x) (0x1010 + 32 * (x)) -#define EDMA_TCD_DOFF(x) (0x1014 + 32 * (x)) -#define EDMA_TCD_CITER_ELINK(x) (0x1016 + 32 * (x)) -#define EDMA_TCD_CITER(x) (0x1016 + 32 * (x)) -#define EDMA_TCD_DLAST_SGA(x) (0x1018 + 32 * (x)) -#define EDMA_TCD_CSR(x) (0x101C + 32 * (x)) -#define EDMA_TCD_BITER_ELINK(x) (0x101E + 32 * (x)) -#define EDMA_TCD_BITER(x) (0x101E + 32 * (x)) - -#define EDMA_CR_EDBG BIT(1) -#define EDMA_CR_ERCA BIT(2) -#define EDMA_CR_ERGA BIT(3) -#define EDMA_CR_HOE BIT(4) -#define EDMA_CR_HALT BIT(5) -#define EDMA_CR_CLM BIT(6) -#define EDMA_CR_EMLM BIT(7) -#define EDMA_CR_ECX BIT(16) -#define EDMA_CR_CX BIT(17) - -#define EDMA_SEEI_SEEI(x) ((x) & 0x1F) -#define EDMA_CEEI_CEEI(x) ((x) & 0x1F) -#define EDMA_CINT_CINT(x) ((x) & 0x1F) -#define EDMA_CERR_CERR(x) ((x) & 0x1F) - -#define EDMA_TCD_ATTR_DSIZE(x) (((x) & 0x0007)) -#define EDMA_TCD_ATTR_DMOD(x) (((x) & 0x001F) << 3) -#define EDMA_TCD_ATTR_SSIZE(x) (((x) & 0x0007) << 8) -#define EDMA_TCD_ATTR_SMOD(x) (((x) & 0x001F) << 11) -#define EDMA_TCD_ATTR_SSIZE_8BIT (0x0000) -#define EDMA_TCD_ATTR_SSIZE_16BIT (0x0100) -#define EDMA_TCD_ATTR_SSIZE_32BIT (0x0200) -#define EDMA_TCD_ATTR_SSIZE_64BIT (0x0300) -#define EDMA_TCD_ATTR_SSIZE_32BYTE (0x0500) -#define EDMA_TCD_ATTR_DSIZE_8BIT (0x0000) -#define EDMA_TCD_ATTR_DSIZE_16BIT (0x0001) -#define EDMA_TCD_ATTR_DSIZE_32BIT (0x0002) -#define EDMA_TCD_ATTR_DSIZE_64BIT (0x0003) -#define EDMA_TCD_ATTR_DSIZE_32BYTE (0x0005) - -#define EDMA_TCD_SOFF_SOFF(x) (x) -#define EDMA_TCD_NBYTES_NBYTES(x) (x) -#define EDMA_TCD_SLAST_SLAST(x) (x) -#define EDMA_TCD_DADDR_DADDR(x) (x) -#define EDMA_TCD_CITER_CITER(x) ((x) & 0x7FFF) -#define EDMA_TCD_DOFF_DOFF(x) (x) -#define EDMA_TCD_DLAST_SGA_DLAST_SGA(x) (x) -#define EDMA_TCD_BITER_BITER(x) ((x) & 0x7FFF) - -#define EDMA_TCD_CSR_START BIT(0) -#define EDMA_TCD_CSR_INT_MAJOR BIT(1) -#define EDMA_TCD_CSR_INT_HALF BIT(2) -#define EDMA_TCD_CSR_D_REQ BIT(3) -#define EDMA_TCD_CSR_E_SG BIT(4) -#define EDMA_TCD_CSR_E_LINK BIT(5) -#define EDMA_TCD_CSR_ACTIVE BIT(6) -#define EDMA_TCD_CSR_DONE BIT(7) - -#define EDMAMUX_CHCFG_DIS 0x0 -#define EDMAMUX_CHCFG_ENBL 0x80 -#define EDMAMUX_CHCFG_SOURCE(n) ((n) & 0x3F) - -#define DMAMUX_NR 2 - -#define FSL_EDMA_BUSWIDTHS BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \ - BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \ - BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \ - BIT(DMA_SLAVE_BUSWIDTH_8_BYTES) -enum fsl_edma_pm_state { - RUNNING = 0, - SUSPENDED, -}; - -struct fsl_edma_hw_tcd { - __le32 saddr; - __le16 soff; - __le16 attr; - __le32 nbytes; - __le32 slast; - __le32 daddr; - __le16 doff; - __le16 citer; - __le32 dlast_sga; - __le16 csr; - __le16 biter; -}; - -struct fsl_edma_sw_tcd { - dma_addr_t ptcd; - struct fsl_edma_hw_tcd *vtcd; -}; - -struct fsl_edma_slave_config { - enum dma_transfer_direction dir; - enum dma_slave_buswidth addr_width; - u32 dev_addr; - u32 burst; - u32 attr; -}; - -struct fsl_edma_chan { - struct virt_dma_chan vchan; - enum dma_status status; - enum fsl_edma_pm_state pm_state; - bool idle; - u32 slave_id; - struct fsl_edma_engine *edma; - struct fsl_edma_desc *edesc; - struct fsl_edma_slave_config fsc; - struct dma_pool *tcd_pool; -}; - -struct fsl_edma_desc { - struct virt_dma_desc vdesc; - struct fsl_edma_chan *echan; - bool iscyclic; - unsigned int n_tcds; - struct fsl_edma_sw_tcd tcd[]; -}; - -struct fsl_edma_engine { - struct dma_device dma_dev; - void __iomem *membase; - void __iomem *muxbase[DMAMUX_NR]; - struct clk *muxclk[DMAMUX_NR]; - struct mutex fsl_edma_mutex; - u32 n_chans; - int txirq; - int errirq; - bool big_endian; - struct fsl_edma_chan chans[]; -}; - -/* - * R/W functions for big- or little-endian registers: - * The eDMA controller's endian is independent of the CPU core's endian. - * For the big-endian IP module, the offset for 8-bit or 16-bit registers - * should also be swapped opposite to that in little-endian IP. - */ - -static u32 edma_readl(struct fsl_edma_engine *edma, void __iomem *addr) -{ - if (edma->big_endian) - return ioread32be(addr); - else - return ioread32(addr); -} - -static void edma_writeb(struct fsl_edma_engine *edma, u8 val, void __iomem *addr) -{ - /* swap the reg offset for these in big-endian mode */ - if (edma->big_endian) - iowrite8(val, (void __iomem *)((unsigned long)addr ^ 0x3)); - else - iowrite8(val, addr); -} - -static void edma_writew(struct fsl_edma_engine *edma, u16 val, void __iomem *addr) -{ - /* swap the reg offset for these in big-endian mode */ - if (edma->big_endian) - iowrite16be(val, (void __iomem *)((unsigned long)addr ^ 0x2)); - else - iowrite16(val, addr); -} - -static void edma_writel(struct fsl_edma_engine *edma, u32 val, void __iomem *addr) -{ - if (edma->big_endian) - iowrite32be(val, addr); - else - iowrite32(val, addr); -} - -static struct fsl_edma_chan *to_fsl_edma_chan(struct dma_chan *chan) -{ - return container_of(chan, struct fsl_edma_chan, vchan.chan); -} - -static struct fsl_edma_desc *to_fsl_edma_desc(struct virt_dma_desc *vd) -{ - return container_of(vd, struct fsl_edma_desc, vdesc); -} - -static void fsl_edma_enable_request(struct fsl_edma_chan *fsl_chan) -{ - void __iomem *addr = fsl_chan->edma->membase; - u32 ch = fsl_chan->vchan.chan.chan_id; - - edma_writeb(fsl_chan->edma, EDMA_SEEI_SEEI(ch), addr + EDMA_SEEI); - edma_writeb(fsl_chan->edma, ch, addr + EDMA_SERQ); -} - -static void fsl_edma_disable_request(struct fsl_edma_chan *fsl_chan) -{ - void __iomem *addr = fsl_chan->edma->membase; - u32 ch = fsl_chan->vchan.chan.chan_id; - - edma_writeb(fsl_chan->edma, ch, addr + EDMA_CERQ); - edma_writeb(fsl_chan->edma, EDMA_CEEI_CEEI(ch), addr + EDMA_CEEI); -} - -static void fsl_edma_chan_mux(struct fsl_edma_chan *fsl_chan, - unsigned int slot, bool enable) -{ - u32 ch = fsl_chan->vchan.chan.chan_id; - void __iomem *muxaddr; - unsigned chans_per_mux, ch_off; - - chans_per_mux = fsl_chan->edma->n_chans / DMAMUX_NR; - ch_off = fsl_chan->vchan.chan.chan_id % chans_per_mux; - muxaddr = fsl_chan->edma->muxbase[ch / chans_per_mux]; - slot = EDMAMUX_CHCFG_SOURCE(slot); - - if (enable) - iowrite8(EDMAMUX_CHCFG_ENBL | slot, muxaddr + ch_off); - else - iowrite8(EDMAMUX_CHCFG_DIS, muxaddr + ch_off); -} - -static unsigned int fsl_edma_get_tcd_attr(enum dma_slave_buswidth addr_width) -{ - switch (addr_width) { - case 1: - return EDMA_TCD_ATTR_SSIZE_8BIT | EDMA_TCD_ATTR_DSIZE_8BIT; - case 2: - return EDMA_TCD_ATTR_SSIZE_16BIT | EDMA_TCD_ATTR_DSIZE_16BIT; - case 4: - return EDMA_TCD_ATTR_SSIZE_32BIT | EDMA_TCD_ATTR_DSIZE_32BIT; - case 8: - return EDMA_TCD_ATTR_SSIZE_64BIT | EDMA_TCD_ATTR_DSIZE_64BIT; - default: - return EDMA_TCD_ATTR_SSIZE_32BIT | EDMA_TCD_ATTR_DSIZE_32BIT; - } -} - -static void fsl_edma_free_desc(struct virt_dma_desc *vdesc) -{ - struct fsl_edma_desc *fsl_desc; - int i; - - fsl_desc = to_fsl_edma_desc(vdesc); - for (i = 0; i < fsl_desc->n_tcds; i++) - dma_pool_free(fsl_desc->echan->tcd_pool, fsl_desc->tcd[i].vtcd, - fsl_desc->tcd[i].ptcd); - kfree(fsl_desc); -} - -static int fsl_edma_terminate_all(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - unsigned long flags; - LIST_HEAD(head); - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - fsl_edma_disable_request(fsl_chan); - fsl_chan->edesc = NULL; - fsl_chan->idle = true; - vchan_get_all_descriptors(&fsl_chan->vchan, &head); - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - vchan_dma_desc_free_list(&fsl_chan->vchan, &head); - return 0; -} - -static int fsl_edma_pause(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - unsigned long flags; - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - if (fsl_chan->edesc) { - fsl_edma_disable_request(fsl_chan); - fsl_chan->status = DMA_PAUSED; - fsl_chan->idle = true; - } - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - return 0; -} - -static int fsl_edma_resume(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - unsigned long flags; - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - if (fsl_chan->edesc) { - fsl_edma_enable_request(fsl_chan); - fsl_chan->status = DMA_IN_PROGRESS; - fsl_chan->idle = false; - } - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - return 0; -} - -static int fsl_edma_slave_config(struct dma_chan *chan, - struct dma_slave_config *cfg) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - - fsl_chan->fsc.dir = cfg->direction; - if (cfg->direction == DMA_DEV_TO_MEM) { - fsl_chan->fsc.dev_addr = cfg->src_addr; - fsl_chan->fsc.addr_width = cfg->src_addr_width; - fsl_chan->fsc.burst = cfg->src_maxburst; - fsl_chan->fsc.attr = fsl_edma_get_tcd_attr(cfg->src_addr_width); - } else if (cfg->direction == DMA_MEM_TO_DEV) { - fsl_chan->fsc.dev_addr = cfg->dst_addr; - fsl_chan->fsc.addr_width = cfg->dst_addr_width; - fsl_chan->fsc.burst = cfg->dst_maxburst; - fsl_chan->fsc.attr = fsl_edma_get_tcd_attr(cfg->dst_addr_width); - } else { - return -EINVAL; - } - return 0; -} - -static size_t fsl_edma_desc_residue(struct fsl_edma_chan *fsl_chan, - struct virt_dma_desc *vdesc, bool in_progress) -{ - struct fsl_edma_desc *edesc = fsl_chan->edesc; - void __iomem *addr = fsl_chan->edma->membase; - u32 ch = fsl_chan->vchan.chan.chan_id; - enum dma_transfer_direction dir = fsl_chan->fsc.dir; - dma_addr_t cur_addr, dma_addr; - size_t len, size; - int i; - - /* calculate the total size in this desc */ - for (len = i = 0; i < fsl_chan->edesc->n_tcds; i++) - len += le32_to_cpu(edesc->tcd[i].vtcd->nbytes) - * le16_to_cpu(edesc->tcd[i].vtcd->biter); - - if (!in_progress) - return len; - - if (dir == DMA_MEM_TO_DEV) - cur_addr = edma_readl(fsl_chan->edma, addr + EDMA_TCD_SADDR(ch)); - else - cur_addr = edma_readl(fsl_chan->edma, addr + EDMA_TCD_DADDR(ch)); - - /* figure out the finished and calculate the residue */ - for (i = 0; i < fsl_chan->edesc->n_tcds; i++) { - size = le32_to_cpu(edesc->tcd[i].vtcd->nbytes) - * le16_to_cpu(edesc->tcd[i].vtcd->biter); - if (dir == DMA_MEM_TO_DEV) - dma_addr = le32_to_cpu(edesc->tcd[i].vtcd->saddr); - else - dma_addr = le32_to_cpu(edesc->tcd[i].vtcd->daddr); - - len -= size; - if (cur_addr >= dma_addr && cur_addr < dma_addr + size) { - len += dma_addr + size - cur_addr; - break; - } - } - - return len; -} - -static enum dma_status fsl_edma_tx_status(struct dma_chan *chan, - dma_cookie_t cookie, struct dma_tx_state *txstate) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - struct virt_dma_desc *vdesc; - enum dma_status status; - unsigned long flags; - - status = dma_cookie_status(chan, cookie, txstate); - if (status == DMA_COMPLETE) - return status; - - if (!txstate) - return fsl_chan->status; - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - vdesc = vchan_find_desc(&fsl_chan->vchan, cookie); - if (fsl_chan->edesc && cookie == fsl_chan->edesc->vdesc.tx.cookie) - txstate->residue = fsl_edma_desc_residue(fsl_chan, vdesc, true); - else if (vdesc) - txstate->residue = fsl_edma_desc_residue(fsl_chan, vdesc, false); - else - txstate->residue = 0; - - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - - return fsl_chan->status; -} - -static void fsl_edma_set_tcd_regs(struct fsl_edma_chan *fsl_chan, - struct fsl_edma_hw_tcd *tcd) -{ - struct fsl_edma_engine *edma = fsl_chan->edma; - void __iomem *addr = fsl_chan->edma->membase; - u32 ch = fsl_chan->vchan.chan.chan_id; - - /* - * TCD parameters are stored in struct fsl_edma_hw_tcd in little - * endian format. However, we need to load the TCD registers in - * big- or little-endian obeying the eDMA engine model endian. - */ - edma_writew(edma, 0, addr + EDMA_TCD_CSR(ch)); - edma_writel(edma, le32_to_cpu(tcd->saddr), addr + EDMA_TCD_SADDR(ch)); - edma_writel(edma, le32_to_cpu(tcd->daddr), addr + EDMA_TCD_DADDR(ch)); - - edma_writew(edma, le16_to_cpu(tcd->attr), addr + EDMA_TCD_ATTR(ch)); - edma_writew(edma, le16_to_cpu(tcd->soff), addr + EDMA_TCD_SOFF(ch)); - - edma_writel(edma, le32_to_cpu(tcd->nbytes), addr + EDMA_TCD_NBYTES(ch)); - edma_writel(edma, le32_to_cpu(tcd->slast), addr + EDMA_TCD_SLAST(ch)); - - edma_writew(edma, le16_to_cpu(tcd->citer), addr + EDMA_TCD_CITER(ch)); - edma_writew(edma, le16_to_cpu(tcd->biter), addr + EDMA_TCD_BITER(ch)); - edma_writew(edma, le16_to_cpu(tcd->doff), addr + EDMA_TCD_DOFF(ch)); - - edma_writel(edma, le32_to_cpu(tcd->dlast_sga), addr + EDMA_TCD_DLAST_SGA(ch)); - - edma_writew(edma, le16_to_cpu(tcd->csr), addr + EDMA_TCD_CSR(ch)); -} - -static inline -void fsl_edma_fill_tcd(struct fsl_edma_hw_tcd *tcd, u32 src, u32 dst, - u16 attr, u16 soff, u32 nbytes, u32 slast, u16 citer, - u16 biter, u16 doff, u32 dlast_sga, bool major_int, - bool disable_req, bool enable_sg) -{ - u16 csr = 0; - - /* - * eDMA hardware SGs require the TCDs to be stored in little - * endian format irrespective of the register endian model. - * So we put the value in little endian in memory, waiting - * for fsl_edma_set_tcd_regs doing the swap. - */ - tcd->saddr = cpu_to_le32(src); - tcd->daddr = cpu_to_le32(dst); - - tcd->attr = cpu_to_le16(attr); - - tcd->soff = cpu_to_le16(EDMA_TCD_SOFF_SOFF(soff)); - - tcd->nbytes = cpu_to_le32(EDMA_TCD_NBYTES_NBYTES(nbytes)); - tcd->slast = cpu_to_le32(EDMA_TCD_SLAST_SLAST(slast)); - - tcd->citer = cpu_to_le16(EDMA_TCD_CITER_CITER(citer)); - tcd->doff = cpu_to_le16(EDMA_TCD_DOFF_DOFF(doff)); - - tcd->dlast_sga = cpu_to_le32(EDMA_TCD_DLAST_SGA_DLAST_SGA(dlast_sga)); - - tcd->biter = cpu_to_le16(EDMA_TCD_BITER_BITER(biter)); - if (major_int) - csr |= EDMA_TCD_CSR_INT_MAJOR; - - if (disable_req) - csr |= EDMA_TCD_CSR_D_REQ; - - if (enable_sg) - csr |= EDMA_TCD_CSR_E_SG; - - tcd->csr = cpu_to_le16(csr); -} - -static struct fsl_edma_desc *fsl_edma_alloc_desc(struct fsl_edma_chan *fsl_chan, - int sg_len) -{ - struct fsl_edma_desc *fsl_desc; - int i; - - fsl_desc = kzalloc(sizeof(*fsl_desc) + sizeof(struct fsl_edma_sw_tcd) * sg_len, - GFP_NOWAIT); - if (!fsl_desc) - return NULL; - - fsl_desc->echan = fsl_chan; - fsl_desc->n_tcds = sg_len; - for (i = 0; i < sg_len; i++) { - fsl_desc->tcd[i].vtcd = dma_pool_alloc(fsl_chan->tcd_pool, - GFP_NOWAIT, &fsl_desc->tcd[i].ptcd); - if (!fsl_desc->tcd[i].vtcd) - goto err; - } - return fsl_desc; - -err: - while (--i >= 0) - dma_pool_free(fsl_chan->tcd_pool, fsl_desc->tcd[i].vtcd, - fsl_desc->tcd[i].ptcd); - kfree(fsl_desc); - return NULL; -} - -static struct dma_async_tx_descriptor *fsl_edma_prep_dma_cyclic( - struct dma_chan *chan, dma_addr_t dma_addr, size_t buf_len, - size_t period_len, enum dma_transfer_direction direction, - unsigned long flags) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - struct fsl_edma_desc *fsl_desc; - dma_addr_t dma_buf_next; - int sg_len, i; - u32 src_addr, dst_addr, last_sg, nbytes; - u16 soff, doff, iter; - - if (!is_slave_direction(fsl_chan->fsc.dir)) - return NULL; - - sg_len = buf_len / period_len; - fsl_desc = fsl_edma_alloc_desc(fsl_chan, sg_len); - if (!fsl_desc) - return NULL; - fsl_desc->iscyclic = true; - - dma_buf_next = dma_addr; - nbytes = fsl_chan->fsc.addr_width * fsl_chan->fsc.burst; - iter = period_len / nbytes; - - for (i = 0; i < sg_len; i++) { - if (dma_buf_next >= dma_addr + buf_len) - dma_buf_next = dma_addr; - - /* get next sg's physical address */ - last_sg = fsl_desc->tcd[(i + 1) % sg_len].ptcd; - - if (fsl_chan->fsc.dir == DMA_MEM_TO_DEV) { - src_addr = dma_buf_next; - dst_addr = fsl_chan->fsc.dev_addr; - soff = fsl_chan->fsc.addr_width; - doff = 0; - } else { - src_addr = fsl_chan->fsc.dev_addr; - dst_addr = dma_buf_next; - soff = 0; - doff = fsl_chan->fsc.addr_width; - } - - fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, dst_addr, - fsl_chan->fsc.attr, soff, nbytes, 0, iter, - iter, doff, last_sg, true, false, true); - dma_buf_next += period_len; - } - - return vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc, flags); -} - -static struct dma_async_tx_descriptor *fsl_edma_prep_slave_sg( - struct dma_chan *chan, struct scatterlist *sgl, - unsigned int sg_len, enum dma_transfer_direction direction, - unsigned long flags, void *context) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - struct fsl_edma_desc *fsl_desc; - struct scatterlist *sg; - u32 src_addr, dst_addr, last_sg, nbytes; - u16 soff, doff, iter; - int i; - - if (!is_slave_direction(fsl_chan->fsc.dir)) - return NULL; - - fsl_desc = fsl_edma_alloc_desc(fsl_chan, sg_len); - if (!fsl_desc) - return NULL; - fsl_desc->iscyclic = false; - - nbytes = fsl_chan->fsc.addr_width * fsl_chan->fsc.burst; - for_each_sg(sgl, sg, sg_len, i) { - /* get next sg's physical address */ - last_sg = fsl_desc->tcd[(i + 1) % sg_len].ptcd; - - if (fsl_chan->fsc.dir == DMA_MEM_TO_DEV) { - src_addr = sg_dma_address(sg); - dst_addr = fsl_chan->fsc.dev_addr; - soff = fsl_chan->fsc.addr_width; - doff = 0; - } else { - src_addr = fsl_chan->fsc.dev_addr; - dst_addr = sg_dma_address(sg); - soff = 0; - doff = fsl_chan->fsc.addr_width; - } - - iter = sg_dma_len(sg) / nbytes; - if (i < sg_len - 1) { - last_sg = fsl_desc->tcd[(i + 1)].ptcd; - fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, - dst_addr, fsl_chan->fsc.attr, soff, - nbytes, 0, iter, iter, doff, last_sg, - false, false, true); - } else { - last_sg = 0; - fsl_edma_fill_tcd(fsl_desc->tcd[i].vtcd, src_addr, - dst_addr, fsl_chan->fsc.attr, soff, - nbytes, 0, iter, iter, doff, last_sg, - true, true, false); - } - } - - return vchan_tx_prep(&fsl_chan->vchan, &fsl_desc->vdesc, flags); -} - -static void fsl_edma_xfer_desc(struct fsl_edma_chan *fsl_chan) -{ - struct virt_dma_desc *vdesc; - - vdesc = vchan_next_desc(&fsl_chan->vchan); - if (!vdesc) - return; - fsl_chan->edesc = to_fsl_edma_desc(vdesc); - fsl_edma_set_tcd_regs(fsl_chan, fsl_chan->edesc->tcd[0].vtcd); - fsl_edma_enable_request(fsl_chan); - fsl_chan->status = DMA_IN_PROGRESS; - fsl_chan->idle = false; -} +#include "fsl-edma-common.h" static irqreturn_t fsl_edma_tx_handler(int irq, void *dev_id) { struct fsl_edma_engine *fsl_edma = dev_id; unsigned int intr, ch; - void __iomem *base_addr; + struct edma_regs *regs = &fsl_edma->regs; struct fsl_edma_chan *fsl_chan; - base_addr = fsl_edma->membase; - - intr = edma_readl(fsl_edma, base_addr + EDMA_INTR); + intr = edma_readl(fsl_edma, regs->intl); if (!intr) return IRQ_NONE; for (ch = 0; ch < fsl_edma->n_chans; ch++) { if (intr & (0x1 << ch)) { - edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), - base_addr + EDMA_CINT); + edma_writeb(fsl_edma, EDMA_CINT_CINT(ch), regs->cint); fsl_chan = &fsl_edma->chans[ch]; @@ -705,16 +65,16 @@ static irqreturn_t fsl_edma_err_handler(int irq, void *dev_id) { struct fsl_edma_engine *fsl_edma = dev_id; unsigned int err, ch; + struct edma_regs *regs = &fsl_edma->regs; - err = edma_readl(fsl_edma, fsl_edma->membase + EDMA_ERR); + err = edma_readl(fsl_edma, regs->errl); if (!err) return IRQ_NONE; for (ch = 0; ch < fsl_edma->n_chans; ch++) { if (err & (0x1 << ch)) { fsl_edma_disable_request(&fsl_edma->chans[ch]); - edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), - fsl_edma->membase + EDMA_CERR); + edma_writeb(fsl_edma, EDMA_CERR_CERR(ch), regs->cerr); fsl_edma->chans[ch].status = DMA_ERROR; fsl_edma->chans[ch].idle = true; } @@ -730,25 +90,6 @@ static irqreturn_t fsl_edma_irq_handler(int irq, void *dev_id) return fsl_edma_err_handler(irq, dev_id); } -static void fsl_edma_issue_pending(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - unsigned long flags; - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - - if (unlikely(fsl_chan->pm_state != RUNNING)) { - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - /* cannot submit due to suspend */ - return; - } - - if (vchan_issue_pending(&fsl_chan->vchan) && !fsl_chan->edesc) - fsl_edma_xfer_desc(fsl_chan); - - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); -} - static struct dma_chan *fsl_edma_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma) { @@ -781,34 +122,6 @@ static struct dma_chan *fsl_edma_xlate(struct of_phandle_args *dma_spec, return NULL; } -static int fsl_edma_alloc_chan_resources(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - - fsl_chan->tcd_pool = dma_pool_create("tcd_pool", chan->device->dev, - sizeof(struct fsl_edma_hw_tcd), - 32, 0); - return 0; -} - -static void fsl_edma_free_chan_resources(struct dma_chan *chan) -{ - struct fsl_edma_chan *fsl_chan = to_fsl_edma_chan(chan); - unsigned long flags; - LIST_HEAD(head); - - spin_lock_irqsave(&fsl_chan->vchan.lock, flags); - fsl_edma_disable_request(fsl_chan); - fsl_edma_chan_mux(fsl_chan, 0, false); - fsl_chan->edesc = NULL; - vchan_get_all_descriptors(&fsl_chan->vchan, &head); - spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags); - - vchan_dma_desc_free_list(&fsl_chan->vchan, &head); - dma_pool_destroy(fsl_chan->tcd_pool); - fsl_chan->tcd_pool = NULL; -} - static int fsl_edma_irq_init(struct platform_device *pdev, struct fsl_edma_engine *fsl_edma) { @@ -876,6 +189,7 @@ static int fsl_edma_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; struct fsl_edma_engine *fsl_edma; struct fsl_edma_chan *fsl_chan; + struct edma_regs *regs; struct resource *res; int len, chans; int ret, i; @@ -891,6 +205,7 @@ static int fsl_edma_probe(struct platform_device *pdev) if (!fsl_edma) return -ENOMEM; + fsl_edma->version = v1; fsl_edma->n_chans = chans; mutex_init(&fsl_edma->fsl_edma_mutex); @@ -899,6 +214,9 @@ static int fsl_edma_probe(struct platform_device *pdev) if (IS_ERR(fsl_edma->membase)) return PTR_ERR(fsl_edma->membase); + fsl_edma_setup_regs(fsl_edma); + regs = &fsl_edma->regs; + for (i = 0; i < DMAMUX_NR; i++) { char clkname[32]; @@ -939,11 +257,11 @@ static int fsl_edma_probe(struct platform_device *pdev) fsl_chan->vchan.desc_free = fsl_edma_free_desc; vchan_init(&fsl_chan->vchan, &fsl_edma->dma_dev); - edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i)); + edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr); fsl_edma_chan_mux(fsl_chan, 0, false); } - edma_writel(fsl_edma, ~0, fsl_edma->membase + EDMA_INTR); + edma_writel(fsl_edma, ~0, regs->intl); ret = fsl_edma_irq_init(pdev, fsl_edma); if (ret) return ret; @@ -990,22 +308,11 @@ static int fsl_edma_probe(struct platform_device *pdev) } /* enable round robin arbitration */ - edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, fsl_edma->membase + EDMA_CR); + edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr); return 0; } -static void fsl_edma_cleanup_vchan(struct dma_device *dmadev) -{ - struct fsl_edma_chan *chan, *_chan; - - list_for_each_entry_safe(chan, _chan, - &dmadev->channels, vchan.chan.device_node) { - list_del(&chan->vchan.chan.device_node); - tasklet_kill(&chan->vchan.task); - } -} - static int fsl_edma_remove(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1048,18 +355,18 @@ static int fsl_edma_resume_early(struct device *dev) { struct fsl_edma_engine *fsl_edma = dev_get_drvdata(dev); struct fsl_edma_chan *fsl_chan; + struct edma_regs *regs = &fsl_edma->regs; int i; for (i = 0; i < fsl_edma->n_chans; i++) { fsl_chan = &fsl_edma->chans[i]; fsl_chan->pm_state = RUNNING; - edma_writew(fsl_edma, 0x0, fsl_edma->membase + EDMA_TCD_CSR(i)); + edma_writew(fsl_edma, 0x0, ®s->tcd[i].csr); if (fsl_chan->slave_id != 0) fsl_edma_chan_mux(fsl_chan, fsl_chan->slave_id, true); } - edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, - fsl_edma->membase + EDMA_CR); + edma_writel(fsl_edma, EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr); return 0; } diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c index 1117b5123a6f..9d360a3fbae3 100644 --- a/drivers/dma/fsldma.c +++ b/drivers/dma/fsldma.c @@ -987,7 +987,7 @@ static void dma_do_tasklet(unsigned long data) chan_dbg(chan, "tasklet entry\n"); - spin_lock_bh(&chan->desc_lock); + spin_lock(&chan->desc_lock); /* the hardware is now idle and ready for more */ chan->idle = true; @@ -995,7 +995,7 @@ static void dma_do_tasklet(unsigned long data) /* Run all cleanup for descriptors which have been completed */ fsldma_cleanup_descriptors(chan); - spin_unlock_bh(&chan->desc_lock); + spin_unlock(&chan->desc_lock); chan_dbg(chan, "tasklet exit\n"); } diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c index 202ffa9f7611..e06f20272fd7 100644 --- a/drivers/dma/hsu/hsu.c +++ b/drivers/dma/hsu/hsu.c @@ -348,10 +348,6 @@ static int hsu_dma_slave_config(struct dma_chan *chan, { struct hsu_dma_chan *hsuc = to_hsu_dma_chan(chan); - /* Check if chan will be configured for slave transfers */ - if (!is_slave_direction(config->direction)) - return -EINVAL; - memcpy(&hsuc->config, config, sizeof(hsuc->config)); return 0; diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c index 1fbf9cb9b742..0baf9797cc09 100644 --- a/drivers/dma/idma64.c +++ b/drivers/dma/idma64.c @@ -142,9 +142,8 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c, { struct idma64_chan *idma64c = &idma64->chan[c]; struct idma64_desc *desc; - unsigned long flags; - spin_lock_irqsave(&idma64c->vchan.lock, flags); + spin_lock(&idma64c->vchan.lock); desc = idma64c->desc; if (desc) { if (status_err & (1 << c)) { @@ -161,7 +160,7 @@ static void idma64_chan_irq(struct idma64 *idma64, unsigned short c, if (idma64c->desc == NULL || desc->status == DMA_ERROR) idma64_stop_transfer(idma64c); } - spin_unlock_irqrestore(&idma64c->vchan.lock, flags); + spin_unlock(&idma64c->vchan.lock); } static irqreturn_t idma64_irq(int irq, void *dev) @@ -408,10 +407,6 @@ static int idma64_slave_config(struct dma_chan *chan, { struct idma64_chan *idma64c = to_idma64_chan(chan); - /* Check if chan will be configured for slave transfers */ - if (!is_slave_direction(config->direction)) - return -EINVAL; - memcpy(&idma64c->config, config, sizeof(idma64c->config)); convert_burst(&idma64c->config.src_maxburst); diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index 75b6ff0415ee..c2fff3f6c9ca 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -162,6 +162,7 @@ struct imxdma_channel { bool enabled_2d; int slot_2d; unsigned int irq; + struct dma_slave_config config; }; enum imx_dma_type { @@ -675,14 +676,15 @@ static int imxdma_terminate_all(struct dma_chan *chan) return 0; } -static int imxdma_config(struct dma_chan *chan, - struct dma_slave_config *dmaengine_cfg) +static int imxdma_config_write(struct dma_chan *chan, + struct dma_slave_config *dmaengine_cfg, + enum dma_transfer_direction direction) { struct imxdma_channel *imxdmac = to_imxdma_chan(chan); struct imxdma_engine *imxdma = imxdmac->imxdma; unsigned int mode = 0; - if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) { + if (direction == DMA_DEV_TO_MEM) { imxdmac->per_address = dmaengine_cfg->src_addr; imxdmac->watermark_level = dmaengine_cfg->src_maxburst; imxdmac->word_size = dmaengine_cfg->src_addr_width; @@ -723,6 +725,16 @@ static int imxdma_config(struct dma_chan *chan, return 0; } +static int imxdma_config(struct dma_chan *chan, + struct dma_slave_config *dmaengine_cfg) +{ + struct imxdma_channel *imxdmac = to_imxdma_chan(chan); + + memcpy(&imxdmac->config, dmaengine_cfg, sizeof(*dmaengine_cfg)); + + return 0; +} + static enum dma_status imxdma_tx_status(struct dma_chan *chan, dma_cookie_t cookie, struct dma_tx_state *txstate) @@ -905,6 +917,8 @@ static struct dma_async_tx_descriptor *imxdma_prep_dma_cyclic( desc->desc.callback = NULL; desc->desc.callback_param = NULL; + imxdma_config_write(chan, &imxdmac->config, direction); + return &desc->desc; } diff --git a/drivers/dma/ioat/init.c b/drivers/dma/ioat/init.c index 4fa4c06c9edb..0fec3c554fe3 100644 --- a/drivers/dma/ioat/init.c +++ b/drivers/dma/ioat/init.c @@ -129,7 +129,7 @@ static void ioat_init_channel(struct ioatdma_device *ioat_dma, struct ioatdma_chan *ioat_chan, int idx); static void ioat_intr_quirk(struct ioatdma_device *ioat_dma); -static int ioat_enumerate_channels(struct ioatdma_device *ioat_dma); +static void ioat_enumerate_channels(struct ioatdma_device *ioat_dma); static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma); static int ioat_dca_enabled = 1; @@ -575,7 +575,7 @@ static void ioat_dma_remove(struct ioatdma_device *ioat_dma) * ioat_enumerate_channels - find and initialize the device's channels * @ioat_dma: the ioat dma device to be enumerated */ -static int ioat_enumerate_channels(struct ioatdma_device *ioat_dma) +static void ioat_enumerate_channels(struct ioatdma_device *ioat_dma) { struct ioatdma_chan *ioat_chan; struct device *dev = &ioat_dma->pdev->dev; @@ -594,7 +594,7 @@ static int ioat_enumerate_channels(struct ioatdma_device *ioat_dma) xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET); xfercap_log &= 0x1f; /* bits [4:0] valid */ if (xfercap_log == 0) - return 0; + return; dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); for (i = 0; i < dma->chancnt; i++) { @@ -611,7 +611,6 @@ static int ioat_enumerate_channels(struct ioatdma_device *ioat_dma) } } dma->chancnt = i; - return i; } /** @@ -1205,8 +1204,15 @@ static void ioat_shutdown(struct pci_dev *pdev) spin_lock_bh(&ioat_chan->prep_lock); set_bit(IOAT_CHAN_DOWN, &ioat_chan->state); - del_timer_sync(&ioat_chan->timer); spin_unlock_bh(&ioat_chan->prep_lock); + /* + * Synchronization rule for del_timer_sync(): + * - The caller must not hold locks which would prevent + * completion of the timer's handler. + * So prep_lock cannot be held before calling it. + */ + del_timer_sync(&ioat_chan->timer); + /* this should quiesce then reset */ ioat_reset_hw(ioat_chan); } diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index 6bfa217ed6d0..fdec2b6cfbb0 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -87,10 +87,10 @@ struct k3_dma_chan { struct virt_dma_chan vc; struct k3_dma_phy *phy; struct list_head node; - enum dma_transfer_direction dir; dma_addr_t dev_addr; enum dma_status status; bool cyclic; + struct dma_slave_config slave_config; }; struct k3_dma_phy { @@ -118,6 +118,10 @@ struct k3_dma_dev { #define to_k3_dma(dmadev) container_of(dmadev, struct k3_dma_dev, slave) +static int k3_dma_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *cfg); + static struct k3_dma_chan *to_k3_chan(struct dma_chan *chan) { return container_of(chan, struct k3_dma_chan, vc.chan); @@ -501,14 +505,8 @@ static struct dma_async_tx_descriptor *k3_dma_prep_memcpy( copy = min_t(size_t, len, DMA_MAX_SIZE); k3_dma_fill_desc(ds, dst, src, copy, num++, c->ccfg); - if (c->dir == DMA_MEM_TO_DEV) { - src += copy; - } else if (c->dir == DMA_DEV_TO_MEM) { - dst += copy; - } else { - src += copy; - dst += copy; - } + src += copy; + dst += copy; len -= copy; } while (len); @@ -542,6 +540,7 @@ static struct dma_async_tx_descriptor *k3_dma_prep_slave_sg( if (!ds) return NULL; num = 0; + k3_dma_config_write(chan, dir, &c->slave_config); for_each_sg(sgl, sg, sglen, i) { addr = sg_dma_address(sg); @@ -602,6 +601,7 @@ k3_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf_addr, avail = buf_len; total = avail; num = 0; + k3_dma_config_write(chan, dir, &c->slave_config); if (period_len < modulo) modulo = period_len; @@ -642,18 +642,26 @@ static int k3_dma_config(struct dma_chan *chan, struct dma_slave_config *cfg) { struct k3_dma_chan *c = to_k3_chan(chan); + + memcpy(&c->slave_config, cfg, sizeof(*cfg)); + + return 0; +} + +static int k3_dma_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *cfg) +{ + struct k3_dma_chan *c = to_k3_chan(chan); u32 maxburst = 0, val = 0; enum dma_slave_buswidth width = DMA_SLAVE_BUSWIDTH_UNDEFINED; - if (cfg == NULL) - return -EINVAL; - c->dir = cfg->direction; - if (c->dir == DMA_DEV_TO_MEM) { + if (dir == DMA_DEV_TO_MEM) { c->ccfg = CX_CFG_DSTINCR; c->dev_addr = cfg->src_addr; maxburst = cfg->src_maxburst; width = cfg->src_addr_width; - } else if (c->dir == DMA_MEM_TO_DEV) { + } else if (dir == DMA_MEM_TO_DEV) { c->ccfg = CX_CFG_SRCINCR; c->dev_addr = cfg->dst_addr; maxburst = cfg->dst_maxburst; diff --git a/drivers/dma/mcf-edma.c b/drivers/dma/mcf-edma.c new file mode 100644 index 000000000000..5de1b07eddff --- /dev/null +++ b/drivers/dma/mcf-edma.c @@ -0,0 +1,317 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright (c) 2013-2014 Freescale Semiconductor, Inc +// Copyright (c) 2017 Sysam, Angelo Dureghello <angelo@sysam.it> + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/dmaengine.h> +#include <linux/platform_device.h> +#include <linux/platform_data/dma-mcf-edma.h> + +#include "fsl-edma-common.h" + +#define EDMA_CHANNELS 64 +#define EDMA_MASK_CH(x) ((x) & GENMASK(5, 0)) + +static irqreturn_t mcf_edma_tx_handler(int irq, void *dev_id) +{ + struct fsl_edma_engine *mcf_edma = dev_id; + struct edma_regs *regs = &mcf_edma->regs; + unsigned int ch; + struct fsl_edma_chan *mcf_chan; + u64 intmap; + + intmap = ioread32(regs->inth); + intmap <<= 32; + intmap |= ioread32(regs->intl); + if (!intmap) + return IRQ_NONE; + + for (ch = 0; ch < mcf_edma->n_chans; ch++) { + if (intmap & BIT(ch)) { + iowrite8(EDMA_MASK_CH(ch), regs->cint); + + mcf_chan = &mcf_edma->chans[ch]; + + spin_lock(&mcf_chan->vchan.lock); + if (!mcf_chan->edesc->iscyclic) { + list_del(&mcf_chan->edesc->vdesc.node); + vchan_cookie_complete(&mcf_chan->edesc->vdesc); + mcf_chan->edesc = NULL; + mcf_chan->status = DMA_COMPLETE; + mcf_chan->idle = true; + } else { + vchan_cyclic_callback(&mcf_chan->edesc->vdesc); + } + + if (!mcf_chan->edesc) + fsl_edma_xfer_desc(mcf_chan); + + spin_unlock(&mcf_chan->vchan.lock); + } + } + + return IRQ_HANDLED; +} + +static irqreturn_t mcf_edma_err_handler(int irq, void *dev_id) +{ + struct fsl_edma_engine *mcf_edma = dev_id; + struct edma_regs *regs = &mcf_edma->regs; + unsigned int err, ch; + + err = ioread32(regs->errl); + if (!err) + return IRQ_NONE; + + for (ch = 0; ch < (EDMA_CHANNELS / 2); ch++) { + if (err & BIT(ch)) { + fsl_edma_disable_request(&mcf_edma->chans[ch]); + iowrite8(EDMA_CERR_CERR(ch), regs->cerr); + mcf_edma->chans[ch].status = DMA_ERROR; + mcf_edma->chans[ch].idle = true; + } + } + + err = ioread32(regs->errh); + if (!err) + return IRQ_NONE; + + for (ch = (EDMA_CHANNELS / 2); ch < EDMA_CHANNELS; ch++) { + if (err & (BIT(ch - (EDMA_CHANNELS / 2)))) { + fsl_edma_disable_request(&mcf_edma->chans[ch]); + iowrite8(EDMA_CERR_CERR(ch), regs->cerr); + mcf_edma->chans[ch].status = DMA_ERROR; + mcf_edma->chans[ch].idle = true; + } + } + + return IRQ_HANDLED; +} + +static int mcf_edma_irq_init(struct platform_device *pdev, + struct fsl_edma_engine *mcf_edma) +{ + int ret = 0, i; + struct resource *res; + + res = platform_get_resource_byname(pdev, + IORESOURCE_IRQ, "edma-tx-00-15"); + if (!res) + return -1; + + for (ret = 0, i = res->start; i <= res->end; ++i) + ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma); + if (ret) + return ret; + + res = platform_get_resource_byname(pdev, + IORESOURCE_IRQ, "edma-tx-16-55"); + if (!res) + return -1; + + for (ret = 0, i = res->start; i <= res->end; ++i) + ret |= request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma); + if (ret) + return ret; + + ret = platform_get_irq_byname(pdev, "edma-tx-56-63"); + if (ret != -ENXIO) { + ret = request_irq(ret, mcf_edma_tx_handler, + 0, "eDMA", mcf_edma); + if (ret) + return ret; + } + + ret = platform_get_irq_byname(pdev, "edma-err"); + if (ret != -ENXIO) { + ret = request_irq(ret, mcf_edma_err_handler, + 0, "eDMA", mcf_edma); + if (ret) + return ret; + } + + return 0; +} + +static void mcf_edma_irq_free(struct platform_device *pdev, + struct fsl_edma_engine *mcf_edma) +{ + int irq; + struct resource *res; + + res = platform_get_resource_byname(pdev, + IORESOURCE_IRQ, "edma-tx-00-15"); + if (res) { + for (irq = res->start; irq <= res->end; irq++) + free_irq(irq, mcf_edma); + } + + res = platform_get_resource_byname(pdev, + IORESOURCE_IRQ, "edma-tx-16-55"); + if (res) { + for (irq = res->start; irq <= res->end; irq++) + free_irq(irq, mcf_edma); + } + + irq = platform_get_irq_byname(pdev, "edma-tx-56-63"); + if (irq != -ENXIO) + free_irq(irq, mcf_edma); + + irq = platform_get_irq_byname(pdev, "edma-err"); + if (irq != -ENXIO) + free_irq(irq, mcf_edma); +} + +static int mcf_edma_probe(struct platform_device *pdev) +{ + struct mcf_edma_platform_data *pdata; + struct fsl_edma_engine *mcf_edma; + struct fsl_edma_chan *mcf_chan; + struct edma_regs *regs; + struct resource *res; + int ret, i, len, chans; + + pdata = dev_get_platdata(&pdev->dev); + if (!pdata) { + dev_err(&pdev->dev, "no platform data supplied\n"); + return -EINVAL; + } + + chans = pdata->dma_channels; + len = sizeof(*mcf_edma) + sizeof(*mcf_chan) * chans; + mcf_edma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL); + if (!mcf_edma) + return -ENOMEM; + + mcf_edma->n_chans = chans; + + /* Set up version for ColdFire edma */ + mcf_edma->version = v2; + mcf_edma->big_endian = 1; + + if (!mcf_edma->n_chans) { + dev_info(&pdev->dev, "setting default channel number to 64"); + mcf_edma->n_chans = 64; + } + + mutex_init(&mcf_edma->fsl_edma_mutex); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + mcf_edma->membase = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(mcf_edma->membase)) + return PTR_ERR(mcf_edma->membase); + + fsl_edma_setup_regs(mcf_edma); + regs = &mcf_edma->regs; + + INIT_LIST_HEAD(&mcf_edma->dma_dev.channels); + for (i = 0; i < mcf_edma->n_chans; i++) { + struct fsl_edma_chan *mcf_chan = &mcf_edma->chans[i]; + + mcf_chan->edma = mcf_edma; + mcf_chan->slave_id = i; + mcf_chan->idle = true; + mcf_chan->vchan.desc_free = fsl_edma_free_desc; + vchan_init(&mcf_chan->vchan, &mcf_edma->dma_dev); + iowrite32(0x0, ®s->tcd[i].csr); + } + + iowrite32(~0, regs->inth); + iowrite32(~0, regs->intl); + + ret = mcf_edma_irq_init(pdev, mcf_edma); + if (ret) + return ret; + + dma_cap_set(DMA_PRIVATE, mcf_edma->dma_dev.cap_mask); + dma_cap_set(DMA_SLAVE, mcf_edma->dma_dev.cap_mask); + dma_cap_set(DMA_CYCLIC, mcf_edma->dma_dev.cap_mask); + + mcf_edma->dma_dev.dev = &pdev->dev; + mcf_edma->dma_dev.device_alloc_chan_resources = + fsl_edma_alloc_chan_resources; + mcf_edma->dma_dev.device_free_chan_resources = + fsl_edma_free_chan_resources; + mcf_edma->dma_dev.device_config = fsl_edma_slave_config; + mcf_edma->dma_dev.device_prep_dma_cyclic = + fsl_edma_prep_dma_cyclic; + mcf_edma->dma_dev.device_prep_slave_sg = fsl_edma_prep_slave_sg; + mcf_edma->dma_dev.device_tx_status = fsl_edma_tx_status; + mcf_edma->dma_dev.device_pause = fsl_edma_pause; + mcf_edma->dma_dev.device_resume = fsl_edma_resume; + mcf_edma->dma_dev.device_terminate_all = fsl_edma_terminate_all; + mcf_edma->dma_dev.device_issue_pending = fsl_edma_issue_pending; + + mcf_edma->dma_dev.src_addr_widths = FSL_EDMA_BUSWIDTHS; + mcf_edma->dma_dev.dst_addr_widths = FSL_EDMA_BUSWIDTHS; + mcf_edma->dma_dev.directions = + BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); + + mcf_edma->dma_dev.filter.fn = mcf_edma_filter_fn; + mcf_edma->dma_dev.filter.map = pdata->slave_map; + mcf_edma->dma_dev.filter.mapcnt = pdata->slavecnt; + + platform_set_drvdata(pdev, mcf_edma); + + ret = dma_async_device_register(&mcf_edma->dma_dev); + if (ret) { + dev_err(&pdev->dev, + "Can't register Freescale eDMA engine. (%d)\n", ret); + return ret; + } + + /* Enable round robin arbitration */ + iowrite32(EDMA_CR_ERGA | EDMA_CR_ERCA, regs->cr); + + return 0; +} + +static int mcf_edma_remove(struct platform_device *pdev) +{ + struct fsl_edma_engine *mcf_edma = platform_get_drvdata(pdev); + + mcf_edma_irq_free(pdev, mcf_edma); + fsl_edma_cleanup_vchan(&mcf_edma->dma_dev); + dma_async_device_unregister(&mcf_edma->dma_dev); + + return 0; +} + +static struct platform_driver mcf_edma_driver = { + .driver = { + .name = "mcf-edma", + }, + .probe = mcf_edma_probe, + .remove = mcf_edma_remove, +}; + +bool mcf_edma_filter_fn(struct dma_chan *chan, void *param) +{ + if (chan->device->dev->driver == &mcf_edma_driver.driver) { + struct fsl_edma_chan *mcf_chan = to_fsl_edma_chan(chan); + + return (mcf_chan->slave_id == (uintptr_t)param); + } + + return false; +} +EXPORT_SYMBOL(mcf_edma_filter_fn); + +static int __init mcf_edma_init(void) +{ + return platform_driver_register(&mcf_edma_driver); +} +subsys_initcall(mcf_edma_init); + +static void __exit mcf_edma_exit(void) +{ + platform_driver_unregister(&mcf_edma_driver); +} +module_exit(mcf_edma_exit); + +MODULE_ALIAS("platform:mcf-edma"); +MODULE_DESCRIPTION("Freescale eDMA engine driver, ColdFire family"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/dma/mmp_tdma.c b/drivers/dma/mmp_tdma.c index 13c68b6434ce..0c56faa03e9a 100644 --- a/drivers/dma/mmp_tdma.c +++ b/drivers/dma/mmp_tdma.c @@ -116,6 +116,7 @@ struct mmp_tdma_chan { u32 burst_sz; enum dma_slave_buswidth buswidth; enum dma_status status; + struct dma_slave_config slave_config; int idx; enum mmp_tdma_type type; @@ -139,6 +140,10 @@ struct mmp_tdma_device { #define to_mmp_tdma_chan(dchan) container_of(dchan, struct mmp_tdma_chan, chan) +static int mmp_tdma_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *dmaengine_cfg); + static void mmp_tdma_chan_set_desc(struct mmp_tdma_chan *tdmac, dma_addr_t phys) { writel(phys, tdmac->reg_base + TDNDPR); @@ -442,6 +447,8 @@ static struct dma_async_tx_descriptor *mmp_tdma_prep_dma_cyclic( if (!desc) goto err_out; + mmp_tdma_config_write(chan, direction, &tdmac->slave_config); + while (buf < buf_len) { desc = &tdmac->desc_arr[i]; @@ -495,7 +502,18 @@ static int mmp_tdma_config(struct dma_chan *chan, { struct mmp_tdma_chan *tdmac = to_mmp_tdma_chan(chan); - if (dmaengine_cfg->direction == DMA_DEV_TO_MEM) { + memcpy(&tdmac->slave_config, dmaengine_cfg, sizeof(*dmaengine_cfg)); + + return 0; +} + +static int mmp_tdma_config_write(struct dma_chan *chan, + enum dma_transfer_direction dir, + struct dma_slave_config *dmaengine_cfg) +{ + struct mmp_tdma_chan *tdmac = to_mmp_tdma_chan(chan); + + if (dir == DMA_DEV_TO_MEM) { tdmac->dev_addr = dmaengine_cfg->src_addr; tdmac->burst_sz = dmaengine_cfg->src_maxburst; tdmac->buswidth = dmaengine_cfg->src_addr_width; @@ -504,7 +522,7 @@ static int mmp_tdma_config(struct dma_chan *chan, tdmac->burst_sz = dmaengine_cfg->dst_maxburst; tdmac->buswidth = dmaengine_cfg->dst_addr_width; } - tdmac->dir = dmaengine_cfg->direction; + tdmac->dir = dir; return mmp_tdma_config_chan(chan); } @@ -530,9 +548,6 @@ static void mmp_tdma_issue_pending(struct dma_chan *chan) static int mmp_tdma_remove(struct platform_device *pdev) { - struct mmp_tdma_device *tdev = platform_get_drvdata(pdev); - - dma_async_device_unregister(&tdev->device); return 0; } @@ -696,7 +711,7 @@ static int mmp_tdma_probe(struct platform_device *pdev) dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); platform_set_drvdata(pdev, tdev); - ret = dma_async_device_register(&tdev->device); + ret = dmaenginem_async_device_register(&tdev->device); if (ret) { dev_err(tdev->device.dev, "unable to register\n"); return ret; @@ -708,7 +723,7 @@ static int mmp_tdma_probe(struct platform_device *pdev) if (ret) { dev_err(tdev->device.dev, "failed to register controller\n"); - dma_async_device_unregister(&tdev->device); + return ret; } } diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c index 969534c1a6c6..7f595355fb79 100644 --- a/drivers/dma/mv_xor.c +++ b/drivers/dma/mv_xor.c @@ -348,9 +348,9 @@ static void mv_xor_tasklet(unsigned long data) { struct mv_xor_chan *chan = (struct mv_xor_chan *) data; - spin_lock_bh(&chan->lock); + spin_lock(&chan->lock); mv_chan_slot_cleanup(chan); - spin_unlock_bh(&chan->lock); + spin_unlock(&chan->lock); } static struct mv_xor_desc_slot * diff --git a/drivers/dma/mxs-dma.c b/drivers/dma/mxs-dma.c index ae5182ff0128..35193b31a9e0 100644 --- a/drivers/dma/mxs-dma.c +++ b/drivers/dma/mxs-dma.c @@ -847,7 +847,7 @@ static int __init mxs_dma_probe(struct platform_device *pdev) mxs_dma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; mxs_dma->dma_device.device_issue_pending = mxs_dma_enable_chan; - ret = dma_async_device_register(&mxs_dma->dma_device); + ret = dmaenginem_async_device_register(&mxs_dma->dma_device); if (ret) { dev_err(mxs_dma->dma_device.dev, "unable to register\n"); return ret; @@ -857,7 +857,6 @@ static int __init mxs_dma_probe(struct platform_device *pdev) if (ret) { dev_err(mxs_dma->dma_device.dev, "failed to register controller\n"); - dma_async_device_unregister(&mxs_dma->dma_device); } dev_info(mxs_dma->dma_device.dev, "initialized\n"); diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c index 8c7b2e8703da..a67b292190f4 100644 --- a/drivers/dma/nbpfaxi.c +++ b/drivers/dma/nbpfaxi.c @@ -1,10 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd. * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. */ #include <linux/bitmap.h> @@ -1095,8 +1092,8 @@ static struct dma_chan *nbpf_of_xlate(struct of_phandle_args *dma_spec, if (!dchan) return NULL; - dev_dbg(dchan->device->dev, "Entry %s(%s)\n", __func__, - dma_spec->np->name); + dev_dbg(dchan->device->dev, "Entry %s(%pOFn)\n", __func__, + dma_spec->np); chan = nbpf_to_chan(dchan); diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c index 7812a6338acd..90bbcef99ef8 100644 --- a/drivers/dma/owl-dma.c +++ b/drivers/dma/owl-dma.c @@ -21,6 +21,7 @@ #include <linux/mm.h> #include <linux/module.h> #include <linux/of_device.h> +#include <linux/of_dma.h> #include <linux/slab.h> #include "virt-dma.h" @@ -161,10 +162,12 @@ struct owl_dma_lli { * struct owl_dma_txd - Wrapper for struct dma_async_tx_descriptor * @vd: virtual DMA descriptor * @lli_list: link list of lli nodes + * @cyclic: flag to indicate cyclic transfers */ struct owl_dma_txd { struct virt_dma_desc vd; struct list_head lli_list; + bool cyclic; }; /** @@ -186,11 +189,15 @@ struct owl_dma_pchan { * @vc: wrappped virtual channel * @pchan: the physical channel utilized by this channel * @txd: active transaction on this channel + * @cfg: slave configuration for this channel + * @drq: physical DMA request ID for this channel */ struct owl_dma_vchan { struct virt_dma_chan vc; struct owl_dma_pchan *pchan; struct owl_dma_txd *txd; + struct dma_slave_config cfg; + u8 drq; }; /** @@ -200,6 +207,7 @@ struct owl_dma_vchan { * @clk: clock for the DMA controller * @lock: a lock to use when change DMA controller global register * @lli_pool: a pool for the LLI descriptors + * @irq: interrupt ID for the DMA controller * @nr_pchans: the number of physical channels * @pchans: array of data for the physical channels * @nr_vchans: the number of physical channels @@ -336,9 +344,11 @@ static struct owl_dma_lli *owl_dma_alloc_lli(struct owl_dma *od) static struct owl_dma_lli *owl_dma_add_lli(struct owl_dma_txd *txd, struct owl_dma_lli *prev, - struct owl_dma_lli *next) + struct owl_dma_lli *next, + bool is_cyclic) { - list_add_tail(&next->node, &txd->lli_list); + if (!is_cyclic) + list_add_tail(&next->node, &txd->lli_list); if (prev) { prev->hw.next_lli = next->phys; @@ -351,7 +361,9 @@ static struct owl_dma_lli *owl_dma_add_lli(struct owl_dma_txd *txd, static inline int owl_dma_cfg_lli(struct owl_dma_vchan *vchan, struct owl_dma_lli *lli, dma_addr_t src, dma_addr_t dst, - u32 len, enum dma_transfer_direction dir) + u32 len, enum dma_transfer_direction dir, + struct dma_slave_config *sconfig, + bool is_cyclic) { struct owl_dma_lli_hw *hw = &lli->hw; u32 mode; @@ -365,6 +377,32 @@ static inline int owl_dma_cfg_lli(struct owl_dma_vchan *vchan, OWL_DMA_MODE_DAM_INC; break; + case DMA_MEM_TO_DEV: + mode |= OWL_DMA_MODE_TS(vchan->drq) + | OWL_DMA_MODE_ST_DCU | OWL_DMA_MODE_DT_DEV + | OWL_DMA_MODE_SAM_INC | OWL_DMA_MODE_DAM_CONST; + + /* + * Hardware only supports 32bit and 8bit buswidth. Since the + * default is 32bit, select 8bit only when requested. + */ + if (sconfig->dst_addr_width == DMA_SLAVE_BUSWIDTH_1_BYTE) + mode |= OWL_DMA_MODE_NDDBW_8BIT; + + break; + case DMA_DEV_TO_MEM: + mode |= OWL_DMA_MODE_TS(vchan->drq) + | OWL_DMA_MODE_ST_DEV | OWL_DMA_MODE_DT_DCU + | OWL_DMA_MODE_SAM_CONST | OWL_DMA_MODE_DAM_INC; + + /* + * Hardware only supports 32bit and 8bit buswidth. Since the + * default is 32bit, select 8bit only when requested. + */ + if (sconfig->src_addr_width == DMA_SLAVE_BUSWIDTH_1_BYTE) + mode |= OWL_DMA_MODE_NDDBW_8BIT; + + break; default: return -EINVAL; } @@ -381,7 +419,10 @@ static inline int owl_dma_cfg_lli(struct owl_dma_vchan *vchan, OWL_DMA_LLC_SAV_LOAD_NEXT | OWL_DMA_LLC_DAV_LOAD_NEXT); - hw->ctrlb = llc_hw_ctrlb(OWL_DMA_INTCTL_SUPER_BLOCK); + if (is_cyclic) + hw->ctrlb = llc_hw_ctrlb(OWL_DMA_INTCTL_BLOCK); + else + hw->ctrlb = llc_hw_ctrlb(OWL_DMA_INTCTL_SUPER_BLOCK); return 0; } @@ -443,6 +484,16 @@ static void owl_dma_terminate_pchan(struct owl_dma *od, spin_unlock_irqrestore(&od->lock, flags); } +static void owl_dma_pause_pchan(struct owl_dma_pchan *pchan) +{ + pchan_writel(pchan, 1, OWL_DMAX_PAUSE); +} + +static void owl_dma_resume_pchan(struct owl_dma_pchan *pchan) +{ + pchan_writel(pchan, 0, OWL_DMAX_PAUSE); +} + static int owl_dma_start_next_txd(struct owl_dma_vchan *vchan) { struct owl_dma *od = to_owl_dma(vchan->vc.chan.device); @@ -464,7 +515,10 @@ static int owl_dma_start_next_txd(struct owl_dma_vchan *vchan) lli = list_first_entry(&txd->lli_list, struct owl_dma_lli, node); - int_ctl = OWL_DMA_INTCTL_SUPER_BLOCK; + if (txd->cyclic) + int_ctl = OWL_DMA_INTCTL_BLOCK; + else + int_ctl = OWL_DMA_INTCTL_SUPER_BLOCK; pchan_writel(pchan, OWL_DMAX_MODE, OWL_DMA_MODE_LME); pchan_writel(pchan, OWL_DMAX_LINKLIST_CTL, @@ -627,6 +681,54 @@ static int owl_dma_terminate_all(struct dma_chan *chan) return 0; } +static int owl_dma_config(struct dma_chan *chan, + struct dma_slave_config *config) +{ + struct owl_dma_vchan *vchan = to_owl_vchan(chan); + + /* Reject definitely invalid configurations */ + if (config->src_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES || + config->dst_addr_width == DMA_SLAVE_BUSWIDTH_8_BYTES) + return -EINVAL; + + memcpy(&vchan->cfg, config, sizeof(struct dma_slave_config)); + + return 0; +} + +static int owl_dma_pause(struct dma_chan *chan) +{ + struct owl_dma_vchan *vchan = to_owl_vchan(chan); + unsigned long flags; + + spin_lock_irqsave(&vchan->vc.lock, flags); + + owl_dma_pause_pchan(vchan->pchan); + + spin_unlock_irqrestore(&vchan->vc.lock, flags); + + return 0; +} + +static int owl_dma_resume(struct dma_chan *chan) +{ + struct owl_dma_vchan *vchan = to_owl_vchan(chan); + unsigned long flags; + + if (!vchan->pchan && !vchan->txd) + return 0; + + dev_dbg(chan2dev(chan), "vchan %p: resume\n", &vchan->vc); + + spin_lock_irqsave(&vchan->vc.lock, flags); + + owl_dma_resume_pchan(vchan->pchan); + + spin_unlock_irqrestore(&vchan->vc.lock, flags); + + return 0; +} + static u32 owl_dma_getbytes_chan(struct owl_dma_vchan *vchan) { struct owl_dma_pchan *pchan; @@ -754,13 +856,14 @@ static struct dma_async_tx_descriptor bytes = min_t(size_t, (len - offset), OWL_DMA_FRAME_MAX_LENGTH); ret = owl_dma_cfg_lli(vchan, lli, src + offset, dst + offset, - bytes, DMA_MEM_TO_MEM); + bytes, DMA_MEM_TO_MEM, + &vchan->cfg, txd->cyclic); if (ret) { dev_warn(chan2dev(chan), "failed to config lli\n"); goto err_txd_free; } - prev = owl_dma_add_lli(txd, prev, lli); + prev = owl_dma_add_lli(txd, prev, lli, false); } return vchan_tx_prep(&vchan->vc, &txd->vd, flags); @@ -770,6 +873,133 @@ err_txd_free: return NULL; } +static struct dma_async_tx_descriptor + *owl_dma_prep_slave_sg(struct dma_chan *chan, + struct scatterlist *sgl, + unsigned int sg_len, + enum dma_transfer_direction dir, + unsigned long flags, void *context) +{ + struct owl_dma *od = to_owl_dma(chan->device); + struct owl_dma_vchan *vchan = to_owl_vchan(chan); + struct dma_slave_config *sconfig = &vchan->cfg; + struct owl_dma_txd *txd; + struct owl_dma_lli *lli, *prev = NULL; + struct scatterlist *sg; + dma_addr_t addr, src = 0, dst = 0; + size_t len; + int ret, i; + + txd = kzalloc(sizeof(*txd), GFP_NOWAIT); + if (!txd) + return NULL; + + INIT_LIST_HEAD(&txd->lli_list); + + for_each_sg(sgl, sg, sg_len, i) { + addr = sg_dma_address(sg); + len = sg_dma_len(sg); + + if (len > OWL_DMA_FRAME_MAX_LENGTH) { + dev_err(od->dma.dev, + "frame length exceeds max supported length"); + goto err_txd_free; + } + + lli = owl_dma_alloc_lli(od); + if (!lli) { + dev_err(chan2dev(chan), "failed to allocate lli"); + goto err_txd_free; + } + + if (dir == DMA_MEM_TO_DEV) { + src = addr; + dst = sconfig->dst_addr; + } else { + src = sconfig->src_addr; + dst = addr; + } + + ret = owl_dma_cfg_lli(vchan, lli, src, dst, len, dir, sconfig, + txd->cyclic); + if (ret) { + dev_warn(chan2dev(chan), "failed to config lli"); + goto err_txd_free; + } + + prev = owl_dma_add_lli(txd, prev, lli, false); + } + + return vchan_tx_prep(&vchan->vc, &txd->vd, flags); + +err_txd_free: + owl_dma_free_txd(od, txd); + + return NULL; +} + +static struct dma_async_tx_descriptor + *owl_prep_dma_cyclic(struct dma_chan *chan, + dma_addr_t buf_addr, size_t buf_len, + size_t period_len, + enum dma_transfer_direction dir, + unsigned long flags) +{ + struct owl_dma *od = to_owl_dma(chan->device); + struct owl_dma_vchan *vchan = to_owl_vchan(chan); + struct dma_slave_config *sconfig = &vchan->cfg; + struct owl_dma_txd *txd; + struct owl_dma_lli *lli, *prev = NULL, *first = NULL; + dma_addr_t src = 0, dst = 0; + unsigned int periods = buf_len / period_len; + int ret, i; + + txd = kzalloc(sizeof(*txd), GFP_NOWAIT); + if (!txd) + return NULL; + + INIT_LIST_HEAD(&txd->lli_list); + txd->cyclic = true; + + for (i = 0; i < periods; i++) { + lli = owl_dma_alloc_lli(od); + if (!lli) { + dev_warn(chan2dev(chan), "failed to allocate lli"); + goto err_txd_free; + } + + if (dir == DMA_MEM_TO_DEV) { + src = buf_addr + (period_len * i); + dst = sconfig->dst_addr; + } else if (dir == DMA_DEV_TO_MEM) { + src = sconfig->src_addr; + dst = buf_addr + (period_len * i); + } + + ret = owl_dma_cfg_lli(vchan, lli, src, dst, period_len, + dir, sconfig, txd->cyclic); + if (ret) { + dev_warn(chan2dev(chan), "failed to config lli"); + goto err_txd_free; + } + + if (!first) + first = lli; + + prev = owl_dma_add_lli(txd, prev, lli, false); + } + + /* close the cyclic list */ + owl_dma_add_lli(txd, prev, first, true); + + return vchan_tx_prep(&vchan->vc, &txd->vd, flags); + +err_txd_free: + owl_dma_free_txd(od, txd); + + return NULL; +} + static void owl_dma_free_chan_resources(struct dma_chan *chan) { struct owl_dma_vchan *vchan = to_owl_vchan(chan); @@ -790,6 +1020,27 @@ static inline void owl_dma_free(struct owl_dma *od) } } +static struct dma_chan *owl_dma_of_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct owl_dma *od = ofdma->of_dma_data; + struct owl_dma_vchan *vchan; + struct dma_chan *chan; + u8 drq = dma_spec->args[0]; + + if (drq > od->nr_vchans) + return NULL; + + chan = dma_get_any_slave_channel(&od->dma); + if (!chan) + return NULL; + + vchan = to_owl_vchan(chan); + vchan->drq = drq; + + return chan; +} + static int owl_dma_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -833,12 +1084,19 @@ static int owl_dma_probe(struct platform_device *pdev) spin_lock_init(&od->lock); dma_cap_set(DMA_MEMCPY, od->dma.cap_mask); + dma_cap_set(DMA_SLAVE, od->dma.cap_mask); + dma_cap_set(DMA_CYCLIC, od->dma.cap_mask); od->dma.dev = &pdev->dev; od->dma.device_free_chan_resources = owl_dma_free_chan_resources; od->dma.device_tx_status = owl_dma_tx_status; od->dma.device_issue_pending = owl_dma_issue_pending; od->dma.device_prep_dma_memcpy = owl_dma_prep_memcpy; + od->dma.device_prep_slave_sg = owl_dma_prep_slave_sg; + od->dma.device_prep_dma_cyclic = owl_prep_dma_cyclic; + od->dma.device_config = owl_dma_config; + od->dma.device_pause = owl_dma_pause; + od->dma.device_resume = owl_dma_resume; od->dma.device_terminate_all = owl_dma_terminate_all; od->dma.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); od->dma.dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_4_BYTES); @@ -910,8 +1168,18 @@ static int owl_dma_probe(struct platform_device *pdev) goto err_pool_free; } + /* Device-tree DMA controller registration */ + ret = of_dma_controller_register(pdev->dev.of_node, + owl_dma_of_xlate, od); + if (ret) { + dev_err(&pdev->dev, "of_dma_controller_register failed\n"); + goto err_dma_unregister; + } + return 0; +err_dma_unregister: + dma_async_device_unregister(&od->dma); err_pool_free: clk_disable_unprepare(od->clk); dma_pool_destroy(od->lli_pool); @@ -923,6 +1191,7 @@ static int owl_dma_remove(struct platform_device *pdev) { struct owl_dma *od = platform_get_drvdata(pdev); + of_dma_controller_free(pdev->dev.of_node); dma_async_device_unregister(&od->dma); /* Mask all interrupts for this execution environment */ diff --git a/drivers/dma/ppc4xx/adma.c b/drivers/dma/ppc4xx/adma.c index 4cf0d4d0cecf..25610286979f 100644 --- a/drivers/dma/ppc4xx/adma.c +++ b/drivers/dma/ppc4xx/adma.c @@ -4360,7 +4360,7 @@ static ssize_t enable_store(struct device_driver *dev, const char *buf, } static DRIVER_ATTR_RW(enable); -static ssize_t poly_store(struct device_driver *dev, char *buf) +static ssize_t poly_show(struct device_driver *dev, char *buf) { ssize_t size = 0; u32 reg; diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c index b31c28b67ad3..825725057e00 100644 --- a/drivers/dma/pxa_dma.c +++ b/drivers/dma/pxa_dma.c @@ -1285,7 +1285,6 @@ static int pxad_remove(struct platform_device *op) pxad_cleanup_debugfs(pdev); pxad_free_channels(&pdev->slave); - dma_async_device_unregister(&pdev->slave); return 0; } @@ -1396,7 +1395,7 @@ static int pxad_init_dmadev(struct platform_device *op, init_waitqueue_head(&c->wq_state); } - return dma_async_device_register(&pdev->slave); + return dmaenginem_async_device_register(&pdev->slave); } static int pxad_probe(struct platform_device *op) @@ -1433,7 +1432,7 @@ static int pxad_probe(struct platform_device *op) "#dma-requests set to default 32 as missing in OF: %d", ret); nb_requestors = 32; - }; + } } else if (pdata && pdata->dma_channels) { dma_channels = pdata->dma_channels; nb_requestors = pdata->nb_requestors; diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index 48ee35e2bce6..74fa2b1a6a86 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -198,6 +198,7 @@ struct rcar_dmac { struct dma_device engine; struct device *dev; void __iomem *iomem; + struct device_dma_parameters parms; unsigned int n_channels; struct rcar_dmac_chan *channels; @@ -1792,6 +1793,8 @@ static int rcar_dmac_probe(struct platform_device *pdev) dmac->dev = &pdev->dev; platform_set_drvdata(pdev, dmac); + dmac->dev->dma_parms = &dmac->parms; + dma_set_max_seg_size(dmac->dev, RCAR_DMATCR_MASK); dma_set_mask_and_coherent(dmac->dev, DMA_BIT_MASK(40)); ret = rcar_dmac_parse_of(&pdev->dev, dmac); diff --git a/drivers/dma/sh/shdma-arm.h b/drivers/dma/sh/shdma-arm.h index a1b0ef45d6a2..7459f9a13b5b 100644 --- a/drivers/dma/sh/shdma-arm.h +++ b/drivers/dma/sh/shdma-arm.h @@ -1,11 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Renesas SuperH DMA Engine support * * Copyright (C) 2013 Renesas Electronics, Inc. - * - * This is free software; you can redistribute it and/or modify it under the - * terms of version 2 the GNU General Public License as published by the Free - * Software Foundation. */ #ifndef SHDMA_ARM_H diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c index 6b5626e299b2..c51de498b5b4 100644 --- a/drivers/dma/sh/shdma-base.c +++ b/drivers/dma/sh/shdma-base.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Dmaengine driver base library for DMA controllers, found on SH-based SoCs * @@ -7,10 +8,6 @@ * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved. - * - * This is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. */ #include <linux/delay.h> diff --git a/drivers/dma/sh/shdma-of.c b/drivers/dma/sh/shdma-of.c index f999f9b0d314..be89dd894328 100644 --- a/drivers/dma/sh/shdma-of.c +++ b/drivers/dma/sh/shdma-of.c @@ -1,12 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 /* * SHDMA Device Tree glue * * Copyright (C) 2013 Renesas Electronics Inc. * Author: Guennadi Liakhovetski <g.liakhovetski@gmx.de> - * - * This is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. */ #include <linux/dmaengine.h> diff --git a/drivers/dma/sh/shdma-r8a73a4.c b/drivers/dma/sh/shdma-r8a73a4.c index 96ea3828c3eb..ddc9a3578353 100644 --- a/drivers/dma/sh/shdma-r8a73a4.c +++ b/drivers/dma/sh/shdma-r8a73a4.c @@ -1,11 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Renesas SuperH DMA Engine support for r8a73a4 (APE6) SoCs * * Copyright (C) 2013 Renesas Electronics, Inc. - * - * This is free software; you can redistribute it and/or modify it under the - * terms of version 2 the GNU General Public License as published by the Free - * Software Foundation. */ #include <linux/sh_dma.h> diff --git a/drivers/dma/sh/shdma.h b/drivers/dma/sh/shdma.h index 2c0a969adc9f..bfb69909bd19 100644 --- a/drivers/dma/sh/shdma.h +++ b/drivers/dma/sh/shdma.h @@ -1,14 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ /* * Renesas SuperH DMA Engine support * * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. * - * This is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * */ #ifndef __DMA_SHDMA_H #define __DMA_SHDMA_H diff --git a/drivers/dma/sh/shdmac.c b/drivers/dma/sh/shdmac.c index 04a74e0a95b7..7971ea275387 100644 --- a/drivers/dma/sh/shdmac.c +++ b/drivers/dma/sh/shdmac.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0+ /* * Renesas SuperH DMA Engine support * @@ -8,11 +9,6 @@ * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved. * - * This is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * * - DMA of SuperH does not have Hardware DMA chain mode. * - MAX DMA size is 16MB. * diff --git a/drivers/dma/sh/sudmac.c b/drivers/dma/sh/sudmac.c index 69b9564dc9d9..30cc3553cb8b 100644 --- a/drivers/dma/sh/sudmac.c +++ b/drivers/dma/sh/sudmac.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Renesas SUDMAC support * @@ -8,10 +9,6 @@ * Copyright (C) 2009 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com> * Copyright (C) 2009 Renesas Solutions, Inc. All rights reserved. * Copyright (C) 2007 Freescale Semiconductor, Inc. All rights reserved. - * - * This is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. */ #include <linux/dmaengine.h> diff --git a/drivers/dma/sh/usb-dmac.c b/drivers/dma/sh/usb-dmac.c index 1bb1a8e09025..7f7184c3cf95 100644 --- a/drivers/dma/sh/usb-dmac.c +++ b/drivers/dma/sh/usb-dmac.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0 /* * Renesas USB DMA Controller Driver * @@ -6,10 +7,6 @@ * based on rcar-dmac.c * Copyright (C) 2014 Renesas Electronics Inc. * Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com> - * - * This is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. */ #include <linux/delay.h> diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c index 55df0d41355b..38d4e4f07c66 100644 --- a/drivers/dma/sprd-dma.c +++ b/drivers/dma/sprd-dma.c @@ -68,6 +68,7 @@ /* SPRD_DMA_CHN_CFG register definition */ #define SPRD_DMA_CHN_EN BIT(0) +#define SPRD_DMA_LINKLIST_EN BIT(4) #define SPRD_DMA_WAIT_BDONE_OFFSET 24 #define SPRD_DMA_DONOT_WAIT_BDONE 1 @@ -103,7 +104,7 @@ #define SPRD_DMA_REQ_MODE_MASK GENMASK(1, 0) #define SPRD_DMA_FIX_SEL_OFFSET 21 #define SPRD_DMA_FIX_EN_OFFSET 20 -#define SPRD_DMA_LLIST_END_OFFSET 19 +#define SPRD_DMA_LLIST_END BIT(19) #define SPRD_DMA_FRG_LEN_MASK GENMASK(16, 0) /* SPRD_DMA_CHN_BLK_LEN register definition */ @@ -164,6 +165,7 @@ struct sprd_dma_desc { struct sprd_dma_chn { struct virt_dma_chan vc; void __iomem *chn_base; + struct sprd_dma_linklist linklist; struct dma_slave_config slave_cfg; u32 chn_num; u32 dev_id; @@ -582,7 +584,8 @@ static int sprd_dma_get_step(enum dma_slave_buswidth buswidth) } static int sprd_dma_fill_desc(struct dma_chan *chan, - struct sprd_dma_desc *sdesc, + struct sprd_dma_chn_hw *hw, + unsigned int sglen, int sg_index, dma_addr_t src, dma_addr_t dst, u32 len, enum dma_transfer_direction dir, unsigned long flags, @@ -590,7 +593,6 @@ static int sprd_dma_fill_desc(struct dma_chan *chan, { struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan); struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); - struct sprd_dma_chn_hw *hw = &sdesc->chn_hw; u32 req_mode = (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK; u32 int_mode = flags & SPRD_DMA_INT_MASK; int src_datawidth, dst_datawidth, src_step, dst_step; @@ -670,12 +672,52 @@ static int sprd_dma_fill_desc(struct dma_chan *chan, temp |= (src_step & SPRD_DMA_TRSF_STEP_MASK) << SPRD_DMA_SRC_TRSF_STEP_OFFSET; hw->trsf_step = temp; + /* link-list configuration */ + if (schan->linklist.phy_addr) { + if (sg_index == sglen - 1) + hw->frg_len |= SPRD_DMA_LLIST_END; + + hw->cfg |= SPRD_DMA_LINKLIST_EN; + + /* link-list index */ + temp = (sg_index + 1) % sglen; + /* Next link-list configuration's physical address offset */ + temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR; + /* + * Set the link-list pointer point to next link-list + * configuration's physical address. + */ + hw->llist_ptr = schan->linklist.phy_addr + temp; + } else { + hw->llist_ptr = 0; + } + hw->frg_step = 0; hw->src_blk_step = 0; hw->des_blk_step = 0; return 0; } +static int sprd_dma_fill_linklist_desc(struct dma_chan *chan, + unsigned int sglen, int sg_index, + dma_addr_t src, dma_addr_t dst, u32 len, + enum dma_transfer_direction dir, + unsigned long flags, + struct dma_slave_config *slave_cfg) +{ + struct sprd_dma_chn *schan = to_sprd_dma_chan(chan); + struct sprd_dma_chn_hw *hw; + + if (!schan->linklist.virt_addr) + return -EINVAL; + + hw = (struct sprd_dma_chn_hw *)(schan->linklist.virt_addr + + sg_index * sizeof(*hw)); + + return sprd_dma_fill_desc(chan, hw, sglen, sg_index, src, dst, len, + dir, flags, slave_cfg); +} + static struct dma_async_tx_descriptor * sprd_dma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, size_t len, unsigned long flags) @@ -744,10 +786,20 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, u32 len = 0; int ret, i; - /* TODO: now we only support one sg for each DMA configuration. */ - if (!is_slave_direction(dir) || sglen > 1) + if (!is_slave_direction(dir)) return NULL; + if (context) { + struct sprd_dma_linklist *ll_cfg = + (struct sprd_dma_linklist *)context; + + schan->linklist.phy_addr = ll_cfg->phy_addr; + schan->linklist.virt_addr = ll_cfg->virt_addr; + } else { + schan->linklist.phy_addr = 0; + schan->linklist.virt_addr = 0; + } + sdesc = kzalloc(sizeof(*sdesc), GFP_NOWAIT); if (!sdesc) return NULL; @@ -762,10 +814,25 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, src = slave_cfg->src_addr; dst = sg_dma_address(sg); } + + /* + * The link-list mode needs at least 2 link-list + * configurations. If there is only one sg, it doesn't + * need to fill the link-list configuration. + */ + if (sglen < 2) + break; + + ret = sprd_dma_fill_linklist_desc(chan, sglen, i, src, dst, len, + dir, flags, slave_cfg); + if (ret) { + kfree(sdesc); + return NULL; + } } - ret = sprd_dma_fill_desc(chan, sdesc, src, dst, len, dir, flags, - slave_cfg); + ret = sprd_dma_fill_desc(chan, &sdesc->chn_hw, 0, 0, src, dst, len, + dir, flags, slave_cfg); if (ret) { kfree(sdesc); return NULL; diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c index bfb79bd0c6de..07c20aa2e955 100644 --- a/drivers/dma/st_fdma.c +++ b/drivers/dma/st_fdma.c @@ -833,7 +833,7 @@ static int st_fdma_probe(struct platform_device *pdev) fdev->dma_device.directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV); fdev->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; - ret = dma_async_device_register(&fdev->dma_device); + ret = dmaenginem_async_device_register(&fdev->dma_device); if (ret) { dev_err(&pdev->dev, "Failed to register DMA device (%d)\n", ret); @@ -844,15 +844,13 @@ static int st_fdma_probe(struct platform_device *pdev) if (ret) { dev_err(&pdev->dev, "Failed to register controller (%d)\n", ret); - goto err_dma_dev; + goto err_rproc; } dev_info(&pdev->dev, "ST FDMA engine driver, irq:%d\n", fdev->irq); return 0; -err_dma_dev: - dma_async_device_unregister(&fdev->dma_device); err_rproc: st_fdma_free(fdev); st_slim_rproc_put(fdev->slim_rproc); @@ -867,7 +865,6 @@ static int st_fdma_remove(struct platform_device *pdev) devm_free_irq(&pdev->dev, fdev->irq, fdev); st_slim_rproc_put(fdev->slim_rproc); of_dma_controller_free(pdev->dev.of_node); - dma_async_device_unregister(&fdev->dma_device); return 0; } diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c index f4edfc56f34e..5e328bd10c27 100644 --- a/drivers/dma/ste_dma40.c +++ b/drivers/dma/ste_dma40.c @@ -2839,7 +2839,7 @@ static int __init d40_dmaengine_init(struct d40_base *base, d40_ops_init(base, &base->dma_slave); - err = dma_async_device_register(&base->dma_slave); + err = dmaenginem_async_device_register(&base->dma_slave); if (err) { d40_err(base->dev, "Failed to register slave channels\n"); @@ -2854,12 +2854,12 @@ static int __init d40_dmaengine_init(struct d40_base *base, d40_ops_init(base, &base->dma_memcpy); - err = dma_async_device_register(&base->dma_memcpy); + err = dmaenginem_async_device_register(&base->dma_memcpy); if (err) { d40_err(base->dev, "Failed to register memcpy only channels\n"); - goto unregister_slave; + goto exit; } d40_chan_init(base, &base->dma_both, base->phy_chans, @@ -2871,18 +2871,14 @@ static int __init d40_dmaengine_init(struct d40_base *base, dma_cap_set(DMA_CYCLIC, base->dma_slave.cap_mask); d40_ops_init(base, &base->dma_both); - err = dma_async_device_register(&base->dma_both); + err = dmaenginem_async_device_register(&base->dma_both); if (err) { d40_err(base->dev, "Failed to register logical and physical capable channels\n"); - goto unregister_memcpy; + goto exit; } return 0; - unregister_memcpy: - dma_async_device_unregister(&base->dma_memcpy); - unregister_slave: - dma_async_device_unregister(&base->dma_slave); exit: return err; } diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c index 379e8d534e61..4903a408fc14 100644 --- a/drivers/dma/stm32-dma.c +++ b/drivers/dma/stm32-dma.c @@ -308,20 +308,12 @@ static bool stm32_dma_fifo_threshold_is_allowed(u32 burst, u32 threshold, static bool stm32_dma_is_burst_possible(u32 buf_len, u32 threshold) { - switch (threshold) { - case STM32_DMA_FIFO_THRESHOLD_FULL: - if (buf_len >= STM32_DMA_MAX_BURST) - return true; - else - return false; - case STM32_DMA_FIFO_THRESHOLD_HALFFULL: - if (buf_len >= STM32_DMA_MAX_BURST / 2) - return true; - else - return false; - default: - return false; - } + /* + * Buffer or period length has to be aligned on FIFO depth. + * Otherwise bytes may be stuck within FIFO at buffer or period + * length. + */ + return ((buf_len % ((threshold + 1) * 4)) == 0); } static u32 stm32_dma_get_best_burst(u32 buf_len, u32 max_burst, u32 threshold, diff --git a/drivers/dma/stm32-mdma.c b/drivers/dma/stm32-mdma.c index 06dd1725375e..390e4cae0e1a 100644 --- a/drivers/dma/stm32-mdma.c +++ b/drivers/dma/stm32-mdma.c @@ -1656,7 +1656,7 @@ static int stm32_mdma_probe(struct platform_device *pdev) return ret; } - ret = dma_async_device_register(dd); + ret = dmaenginem_async_device_register(dd); if (ret) return ret; @@ -1674,8 +1674,6 @@ static int stm32_mdma_probe(struct platform_device *pdev) return 0; err_unregister: - dma_async_device_unregister(dd); - return ret; } diff --git a/drivers/dma/timb_dma.c b/drivers/dma/timb_dma.c index 395c698edb4d..fc0f9c8766a8 100644 --- a/drivers/dma/timb_dma.c +++ b/drivers/dma/timb_dma.c @@ -545,7 +545,7 @@ static struct dma_async_tx_descriptor *td_prep_slave_sg(struct dma_chan *chan, } dma_sync_single_for_device(chan2dmadev(chan), td_desc->txd.phys, - td_desc->desc_list_len, DMA_MEM_TO_DEV); + td_desc->desc_list_len, DMA_TO_DEVICE); return &td_desc->txd; } |
