From 7f933bed96e9872131014ea2bdd5b012e43fc316 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Tue, 25 Jan 2011 11:18:30 +0100 Subject: dma40: use flags to reduce parameter count Acked-by: Per Forlin Acked-by: Jonas Aaberg Signed-off-by: Rabin Vincent Signed-off-by: Linus Walleij Signed-off-by: Dan Williams --- drivers/dma/ste_dma40_ll.c | 84 ++++++++++++++++++++++++++-------------------- 1 file changed, 47 insertions(+), 37 deletions(-) (limited to 'drivers/dma/ste_dma40_ll.c') diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c index 876aad2c838a..88b9e371be2f 100644 --- a/drivers/dma/ste_dma40_ll.c +++ b/drivers/dma/ste_dma40_ll.c @@ -127,10 +127,11 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli, u32 data_size, dma_addr_t next_lli, u32 reg_cfg, - bool term_int, - bool is_device, - struct stedma40_half_channel_info *info) + struct stedma40_half_channel_info *info, + unsigned int flags) { + bool addr_inc = flags & LLI_ADDR_INC; + bool term_int = flags & LLI_TERM_INT; unsigned int data_width = info->data_width; int psize = info->psize; int num_elems; @@ -155,7 +156,7 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli, * Distance to next element sized entry. * Usually the size of the element unless you want gaps. */ - if (!is_device) + if (addr_inc) lli->reg_elt |= (0x1 << data_width) << D40_SREG_ELEM_PHY_EIDX_POS; @@ -201,40 +202,45 @@ static int d40_seg_size(int size, int data_width1, int data_width2) static struct d40_phy_lli * d40_phy_buf_to_lli(struct d40_phy_lli *lli, dma_addr_t addr, u32 size, - dma_addr_t lli_phys, u32 reg_cfg, bool term_int, - bool is_device, struct stedma40_half_channel_info *info, - struct stedma40_half_channel_info *otherinfo) + dma_addr_t lli_phys, u32 reg_cfg, + struct stedma40_half_channel_info *info, + struct stedma40_half_channel_info *otherinfo, + unsigned long flags) { + bool addr_inc = flags & LLI_ADDR_INC; + bool term_int = flags & LLI_TERM_INT; int err; dma_addr_t next = lli_phys; int size_rest = size; int size_seg = 0; + /* + * This piece may be split up based on d40_seg_size(); we only want the + * term int on the last part. + */ + if (term_int) + flags &= ~LLI_TERM_INT; + do { size_seg = d40_seg_size(size_rest, info->data_width, otherinfo->data_width); size_rest -= size_seg; - if (term_int && size_rest == 0) + if (term_int && size_rest == 0) { next = 0; - else + flags |= LLI_TERM_INT; + } else next = ALIGN(next + sizeof(struct d40_phy_lli), D40_LLI_ALIGN); - err = d40_phy_fill_lli(lli, - addr, - size_seg, - next, - reg_cfg, - !next, - is_device, - info); + err = d40_phy_fill_lli(lli, addr, size_seg, next, + reg_cfg, info, flags); if (err) goto err; lli++; - if (!is_device) + if (addr_inc) addr += size_seg; } while (size_rest); @@ -256,31 +262,29 @@ int d40_phy_sg_to_lli(struct scatterlist *sg, int total_size = 0; int i; struct scatterlist *current_sg = sg; - dma_addr_t dst; struct d40_phy_lli *lli = lli_sg; dma_addr_t l_phys = lli_phys; + unsigned long flags = 0; + + if (!target) + flags |= LLI_ADDR_INC; for_each_sg(sg, current_sg, sg_len, i) { + dma_addr_t sg_addr = sg_dma_address(current_sg); + unsigned int len = sg_dma_len(current_sg); + dma_addr_t dst = target ?: sg_addr; total_size += sg_dma_len(current_sg); - if (target) - dst = target; - else - dst = sg_dma_address(current_sg); + if (i == sg_len - 1) + flags |= LLI_TERM_INT; l_phys = ALIGN(lli_phys + (lli - lli_sg) * sizeof(struct d40_phy_lli), D40_LLI_ALIGN); - lli = d40_phy_buf_to_lli(lli, - dst, - sg_dma_len(current_sg), - l_phys, - reg_cfg, - sg_len - 1 == i, - target == dst, - info, - otherinfo); + lli = d40_phy_buf_to_lli(lli, dst, len, l_phys, + reg_cfg, info, otherinfo, flags); + if (lli == NULL) return -EINVAL; } @@ -343,8 +347,10 @@ static void d40_log_fill_lli(struct d40_log_lli *lli, dma_addr_t data, u32 data_size, u32 reg_cfg, u32 data_width, - bool addr_inc) + unsigned int flags) { + bool addr_inc = flags & LLI_ADDR_INC; + lli->lcsp13 = reg_cfg; /* The number of elements to transfer */ @@ -369,8 +375,9 @@ static struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg, u32 lcsp13, /* src or dst*/ u32 data_width1, u32 data_width2, - bool addr_inc) + unsigned int flags) { + bool addr_inc = flags & LLI_ADDR_INC; struct d40_log_lli *lli = lli_sg; int size_rest = size; int size_seg = 0; @@ -383,7 +390,7 @@ static struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg, addr, size_seg, lcsp13, data_width1, - addr_inc); + flags); if (addr_inc) addr += size_seg; lli++; @@ -403,7 +410,10 @@ int d40_log_sg_to_lli(struct scatterlist *sg, struct scatterlist *current_sg = sg; int i; struct d40_log_lli *lli = lli_sg; - bool autoinc = !dev_addr; + unsigned long flags = 0; + + if (!dev_addr) + flags |= LLI_ADDR_INC; for_each_sg(sg, current_sg, sg_len, i) { dma_addr_t sg_addr = sg_dma_address(current_sg); @@ -416,7 +426,7 @@ int d40_log_sg_to_lli(struct scatterlist *sg, lcsp13, data_width1, data_width2, - autoinc); + flags); } return total_size; -- cgit v1.2.3