Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761979AbXEUKJi (ORCPT ); Mon, 21 May 2007 06:09:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757071AbXEUKJL (ORCPT ); Mon, 21 May 2007 06:09:11 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:5145 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756460AbXEUKJJ (ORCPT ); Mon, 21 May 2007 06:09:09 -0400 X-IronPort-AV: i="4.14,560,1170651600"; d="scan'208"; a="30505436:sNHT24791445" From: Bryan Wu To: torvalds@linux-foundation.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org Cc: Michael Hennerich , Bryan Wu Subject: [PATCH 09/32] Blackfin arch: DMA operation cleanup Date: Mon, 21 May 2007 18:09:17 +0800 Message-Id: <11797421841321-git-send-email-bryan.wu@analog.com> X-Mailer: git-send-email 1.5.1.2 In-Reply-To: <1179742180228-git-send-email-bryan.wu@analog.com> References: <1179742180228-git-send-email-bryan.wu@analog.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 9536 Lines: 294 From: Michael Hennerich 1) Disable Interrupts during DMA memcpy to avoid raise conditions. 2) Mark MDMA channel 0 as reserved, since were using it internally. 3) Add DMA based equivalents for insX and outsX. 4) Our insX and outsX only handles len <= 2^16. Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- arch/blackfin/kernel/bfin_dma_5xx.c | 204 ++++++++++++++++++++++++++++++++++- include/asm-blackfin/io.h | 20 +++- 2 files changed, 214 insertions(+), 10 deletions(-) diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 1431424..1c344ac 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -130,7 +130,9 @@ static int __init blackfin_dma_init(void) dma_ch[i].regs = base_addr[i]; mutex_init(&(dma_ch[i].dmalock)); } - + /* Mark MEMDMA Channel 0 as requested since we're using it internally */ + dma_ch[CH_MEM_STREAM0_DEST].chan_status = DMA_CHANNEL_REQUESTED; + dma_ch[CH_MEM_STREAM0_SRC].chan_status = DMA_CHANNEL_REQUESTED; return 0; } @@ -598,9 +600,12 @@ void *dma_memcpy(void *dest, const void *src, size_t size) int direction; /* 1 - address decrease, 0 - address increase */ int flag_align; /* 1 - address aligned, 0 - address unaligned */ int flag_2D; /* 1 - 2D DMA needed, 0 - 1D DMA needed */ + unsigned long flags; if (size <= 0) return NULL; + + local_irq_save(flags); if ((unsigned long)src < memory_end) blackfin_dcache_flush_range((unsigned int)src, @@ -725,6 +730,7 @@ void *dma_memcpy(void *dest, const void *src, size_t size) if ((unsigned long)dest < memory_end) blackfin_dcache_invalidate_range((unsigned int)dest, (unsigned int)(dest + size)); + local_irq_restore(flags); return dest; } @@ -732,11 +738,201 @@ EXPORT_SYMBOL(dma_memcpy); void *safe_dma_memcpy(void *dest, const void *src, size_t size) { - int flags = 0; void *addr; - local_irq_save(flags); addr = dma_memcpy(dest, src, size); - local_irq_restore(flags); return addr; } EXPORT_SYMBOL(safe_dma_memcpy); + +void dma_outsb(void __iomem *addr, const void *buf, unsigned short len) +{ + + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(1); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsb); + + +void dma_insb(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(1); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insb); + +void dma_outsw(void __iomem *addr, const void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(2); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsw); + +void dma_insw(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(2); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insw); + +void dma_outsl(void __iomem *addr, const void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(4); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsl); + +void dma_insl(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(4); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insl); diff --git a/include/asm-blackfin/io.h b/include/asm-blackfin/io.h index 7e6995e..eac8bca 100644 --- a/include/asm-blackfin/io.h +++ b/include/asm-blackfin/io.h @@ -115,13 +115,21 @@ static inline unsigned int readl(void __iomem *addr) #ifndef __ASSEMBLY__ -extern void outsb(void __iomem *port, const void *addr, unsigned long count); -extern void outsw(void __iomem *port, const void *addr, unsigned long count); -extern void outsl(void __iomem *port, const void *addr, unsigned long count); +extern void outsb(void __iomem *port, const void *addr, unsigned short count); +extern void outsw(void __iomem *port, const void *addr, unsigned short count); +extern void outsl(void __iomem *port, const void *addr, unsigned short count); -extern void insb(const void __iomem *port, void *addr, unsigned long count); -extern void insw(const void __iomem *port, void *addr, unsigned long count); -extern void insl(const void __iomem *port, void *addr, unsigned long count); +extern void insb(const void __iomem *port, void *addr, unsigned short count); +extern void insw(const void __iomem *port, void *addr, unsigned short count); +extern void insl(const void __iomem *port, void *addr, unsigned short count); + +extern void dma_outsb(void __iomem *port, const void *addr, unsigned short count); +extern void dma_outsw(void __iomem *port, const void *addr, unsigned short count); +extern void dma_outsl(void __iomem *port, const void *addr, unsigned short count); + +extern void dma_insb(const void __iomem *port, void *addr, unsigned short count); +extern void dma_insw(const void __iomem *port, void *addr, unsigned short count); +extern void dma_insl(const void __iomem *port, void *addr, unsigned short count); /* * Map some physical address range into the kernel address space. -- 1.5.1.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/