From: Viresh Kumar <viresh.kumar@st.com> To: <linus.walleij@linaro.org> Cc: <vinod.koul@intel.com>, <dan.j.williams@intel.com>, <linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux@arm.linux.org.uk>, <armando.visconti@st.com>, <shiraz.hashim@st.com>, <vipin.kumar@st.com>, <rajeev-dlh.kumar@st.com>, <deepak.sikri@st.com>, <vipulkumar.samar@st.com>, <amit.virdi@st.com>, <viresh.kumar@st.com>, <pratyush.anand@st.com>, <bhupesh.sharma@st.com>, <viresh.linux@gmail.com> Subject: [PATCH V2 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original Date: Mon, 1 Aug 2011 15:07:16 +0530 [thread overview] Message-ID: <295c3ca443ecc1a22f67b32ba4d185b94b79dd95.1312190881.git.viresh.kumar@st.com> (raw) In-Reply-To: <cover.1312190881.git.viresh.kumar@st.com> Similar comment is present over routine also pl08x_choose_master_bus(). Keeping one of them. Also rewrite that comment to convey message clearly. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> --- drivers/dma/amba-pl08x.c | 15 +++++++-------- 1 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 01c2f50..6c52959 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -497,9 +497,13 @@ struct pl08x_lli_build_data { }; /* - * Autoselect a master bus to use for the transfer this prefers the - * destination bus if both available if fixed address on one bus the - * other will be chosen + * Autoselect a master bus to use for the transfer. Slave will be the chosen as + * victim in case src & dest are not similarly aligned. i.e. If after aligning + * masters address with width requirements of transfer (by sending few byte by + * byte data), slave is still not aligned, then its width will be reduced to + * BYTE. + * - prefers the destination bus if both available + * - if fixed address on one bus the other will be chosen */ static void pl08x_choose_master_bus(struct pl08x_lli_build_data *bd, struct pl08x_bus_data **mbus, struct pl08x_bus_data **sbus, u32 cctl) @@ -625,11 +629,6 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x, /* We need to count this down to zero */ bd.remainder = txd->len; - /* - * Choose bus to align to - * - prefers destination bus if both available - * - if fixed address on one bus chooses other - */ pl08x_choose_master_bus(&bd, &mbus, &sbus, cctl); dev_vdbg(&pl08x->adev->dev, "src=0x%08x%s/%u dst=0x%08x%s/%u len=%zu llimax=%zu\n", -- 1.7.2.2
WARNING: multiple messages have this Message-ID (diff)
From: viresh.kumar@st.com (Viresh Kumar) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH V2 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original Date: Mon, 1 Aug 2011 15:07:16 +0530 [thread overview] Message-ID: <295c3ca443ecc1a22f67b32ba4d185b94b79dd95.1312190881.git.viresh.kumar@st.com> (raw) In-Reply-To: <cover.1312190881.git.viresh.kumar@st.com> Similar comment is present over routine also pl08x_choose_master_bus(). Keeping one of them. Also rewrite that comment to convey message clearly. Signed-off-by: Viresh Kumar <viresh.kumar@st.com> --- drivers/dma/amba-pl08x.c | 15 +++++++-------- 1 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c index 01c2f50..6c52959 100644 --- a/drivers/dma/amba-pl08x.c +++ b/drivers/dma/amba-pl08x.c @@ -497,9 +497,13 @@ struct pl08x_lli_build_data { }; /* - * Autoselect a master bus to use for the transfer this prefers the - * destination bus if both available if fixed address on one bus the - * other will be chosen + * Autoselect a master bus to use for the transfer. Slave will be the chosen as + * victim in case src & dest are not similarly aligned. i.e. If after aligning + * masters address with width requirements of transfer (by sending few byte by + * byte data), slave is still not aligned, then its width will be reduced to + * BYTE. + * - prefers the destination bus if both available + * - if fixed address on one bus the other will be chosen */ static void pl08x_choose_master_bus(struct pl08x_lli_build_data *bd, struct pl08x_bus_data **mbus, struct pl08x_bus_data **sbus, u32 cctl) @@ -625,11 +629,6 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x, /* We need to count this down to zero */ bd.remainder = txd->len; - /* - * Choose bus to align to - * - prefers destination bus if both available - * - if fixed address on one bus chooses other - */ pl08x_choose_master_bus(&bd, &mbus, &sbus, cctl); dev_vdbg(&pl08x->adev->dev, "src=0x%08x%s/%u dst=0x%08x%s/%u len=%zu llimax=%zu\n", -- 1.7.2.2
next prev parent reply other threads:[~2011-08-01 9:39 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-08-01 9:37 [PATCH V2 00/20] dmaengine/amba-pl08x updates Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 01/20] ARM: asm/pl080.h: Protect against multiple inclusion of header file Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 02/20] dmaengine/amba-pl08x: Resolve formatting issues Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 03/20] dmaengine/amba-pl08x: Rearrange inclusion of header files in ascending order Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:52 ` Sergei Shtylyov 2011-08-01 9:52 ` Sergei Shtylyov 2011-08-01 10:34 ` viresh kumar 2011-08-01 10:34 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 04/20] dmaengine/amba-pl08x: pass (*ptr) to sizeof() instead of (struct xyz) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 05/20] dmaengine/amba-pl08x: Complete doc comment for struct pl08x_txd Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar [this message] 2011-08-01 9:37 ` [PATCH V2 06/20] dmaengine/amba-pl08x: Remove redundant comment and rewrite original Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 07/20] dmaengine/amba-pl08x: Changing few prints to dev_dbg from dev_info Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-04 8:28 ` Koul, Vinod 2011-08-04 8:28 ` Koul, Vinod 2011-08-04 9:25 ` viresh kumar 2011-08-04 9:25 ` viresh kumar 2011-08-04 8:53 ` Koul, Vinod 2011-08-04 8:53 ` Koul, Vinod 2011-08-01 9:37 ` [PATCH V2 08/20] dmaengine/amba-pl08x: support runtime PM Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 10:26 ` Russell King - ARM Linux 2011-08-01 10:26 ` Russell King - ARM Linux 2011-08-01 11:55 ` viresh kumar 2011-08-01 11:55 ` viresh kumar 2011-08-03 12:39 ` Russell King - ARM Linux 2011-08-03 12:39 ` Russell King - ARM Linux 2011-08-04 5:19 ` viresh kumar 2011-08-04 5:19 ` viresh kumar 2011-08-04 5:36 ` Koul, Vinod 2011-08-04 5:36 ` Koul, Vinod 2011-08-04 6:31 ` viresh kumar 2011-08-04 6:31 ` viresh kumar 2011-08-04 7:28 ` Koul, Vinod 2011-08-04 7:28 ` Koul, Vinod 2011-08-04 8:42 ` viresh kumar 2011-08-04 8:42 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 09/20] dmaengine/amba-pl08x: Simplify pl08x_ensure_on() Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 10/20] dmaengine/amba-pl08x: No need to check "ch->signal < 0" Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 11/20] dmaengine/amba-pl08x: Schedule tasklet in case of error interrupt Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 12/20] dmaengine/amba-pl08x: Get rid of pl08x_pre_boundary() Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 13/20] dmaengine/amba-pl08x: max_bytes_per_lli is TRANSFER_SIZE * src_width (not MIN(width)) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 14/20] dmaengine/amba-pl08x: Add prep_single_byte_llis() routine Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 15/20] dmaengine/amba-pl08x: Align lli_len to max(src.width, dst.width) Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 16/20] dmaengine/amba-pl08x: Choose peripheral bus as master bus Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 17/20] dmaengine/amba-pl08x: Pass flow controller information with slave channel data Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 18/20] dmaengine/amba-pl08x: Add support for sg len greater than one for slave transfers Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-04 10:27 ` viresh kumar 2011-08-04 10:27 ` viresh kumar 2011-08-01 9:37 ` [PATCH V2 19/20] dmaengine/amba-pl08x: Check txd->llis_va before freeing dma_pool Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 9:37 ` [PATCH V2 20/20] dmaengine/amba-pl08x: Call pl08x_free_txd() instead of calling kfree() directly Viresh Kumar 2011-08-01 9:37 ` Viresh Kumar 2011-08-01 11:56 ` [PATCH V3 08/20] dmaengine/amba-pl08x: support runtime PM Viresh Kumar 2011-08-01 11:56 ` Viresh Kumar 2011-08-04 8:52 ` Koul, Vinod 2011-08-04 8:52 ` Koul, Vinod 2011-08-04 9:41 ` viresh kumar 2011-08-04 9:41 ` viresh kumar
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