January 2014 - openSUSE Kernel - openSUSE Mailing Lists

[opensuse-kernel] /etc/sysconfig/kernel vs. /etc/dracut.conf
by Felix Miata 13 Jan '14

13 Jan '14

Is one supposed to override the other in 13.1? In 13.2? If so, which is supposed to take precedence? Before allowing latest kernel to be installed via zypper dup, I appended omit_drivers+="sata_sil" to /etc/dracut.conf as this is what line 29 of the dracut.conf man page seemed to say I needed to ensure that sata_sil would not load via initrd. Yet after including it and proceeding to install the new kernel, sata_sil was included in the new initrd anyway (which puts / on sdbX instead of sdaX as it was at installation time). Why was sata_sil included in INITRD_MODULES in /etc/sysconfig.kernel in the first place? The accessory (PCI) SiI 3512 hardware controller had no attached devices during openSUSE installation. When I do attach something to an eSATA port, it's always a data disk. My boot disks are always internal, same as most systems, and particularly laptops. -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/ -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] netconsole problem with latest kernel
by Giacomo Comes 12 Jan '14

12 Jan '14

Hi, in order to send a bug report for a kms issue with i915, I need to use netconsole to capture the dmesg output before my machine freeze. With 13.1 and stock 3.11.6 kernel I make it work in this way: echo Y >/sys/module/printk/parameters/ignore_loglevel modprobe netconsole netconsole=<local port>@/<local network interface>,@<remote host ip>/ on the remote host I open udp port 6666 in the firewall and run: netcat -u -l 6666 Unfortunately this fails with stable kernel 3.12.6 or lastest kernel 3.13.rc7. The netconsole module is loaded normally but I don't get any output on the remote host. Do you know how to make netconsole work with the latest kernel? Giacomo -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 9/9] dma: edma: Remove limits on number of slots
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From d85757e305f48ace8c99ff9a6ffcb58692ac96c1 Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 29 Aug 2013 18:05:45 -0500 Subject: [PATCH 5/5] dma: edma: Remove limits on number of slots With this series, this check is no longer required and we shouldn't need to reject drivers DMA'ing more than the MAX number of slots. Signed-off-by: Joel Fernandes <joelf(a)ti.com> Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: 5622ff1a4dd7dcb1c09953d8066a4e7c4c350b2d Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/dma/edma.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 9e7833e..a888f36 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -287,12 +287,6 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( return NULL; } - if (sg_len > MAX_NR_SG) { - dev_err(dev, "Exceeded max SG segments %d > %d\n", - sg_len, MAX_NR_SG); - return NULL; - } - edesc = kzalloc(sizeof(*edesc) + sg_len * sizeof(edesc->pset[0]), GFP_ATOMIC); if (!edesc) { -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 8/9] dma: edma: Leave linked to Null slot instead of DUMMY
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From ccd24e197b83e284faea5c920d7f286820f17211 Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 29 Aug 2013 18:05:44 -0500 Subject: [PATCH 4/5] dma: edma: Leave linked to Null slot instead of DUMMY slot Dummy slot has been used as a way for missed-events not to be reported as missing. This has been particularly troublesome for cases where we might want to temporarily pause all incoming events. For EDMA DMAC, there is no way to do any such pausing of events as the occurence of the "next" event is not software controlled. Using "edma_pause" in IRQ handlers doesn't help as by then the event in concern from the slave is already missed. Linking a dummy slot, is seen to absorb these events which we didn't want to miss. So we don't link to dummy, but instead leave it linked to NULL set, allow an error condition and detect the channel that missed it. Consider the case where we have a scatter-list like: SG1->SG2->SG3->SG4->SG5->SG6->Null For ex, for a MAX_NR_SG of 2, earlier we were splitting this as: SG1->SG2->Null SG3->SG4->Null SG5->SG6->Null Now we split it as SG1->SG2->Null SG3->SG4->Null SG5->SG6->Dummy This approach results in lesser unwanted interrupts that occur for the last list split. The Dummy slot has the property of not raising an error condition if events are missed unlike the Null slot. We are OK with this as we're done with processing the whole list once we reach Dummy. Signed-off-by: Joel Fernandes <joelf(a)ti.com> [modifed duplicate s-o-b & patch title] Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: b267b3bc1e781cef17ce026a72c7f0392fa45ada Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/dma/edma.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index a70cce3..9e7833e 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -158,13 +158,18 @@ static void edma_execute(struct edma_chan *echan) /* Link to the previous slot if not the last set */ if (i != (nslots - 1)) edma_link(echan->slot[i], echan->slot[i+1]); - /* Final pset links to the dummy pset */ - else - edma_link(echan->slot[i], echan->ecc->dummy_slot); } edesc->processed += nslots; + /* + * If this is either the last set in a set of SG-list transactions + * then setup a link to the dummy slot, this results in all future + * events being absorbed and that's OK because we're done + */ + if (edesc->processed == edesc->pset_nr) + edma_link(echan->slot[nslots-1], echan->ecc->dummy_slot); + edma_resume(echan->ch_num); if (edesc->processed <= MAX_NR_SG) { -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 7/9] dma: edma: Find missed events and issue them
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From 42df666d3316630ce08cbd29f38f9b303dc1c242 Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 29 Aug 2013 18:05:43 -0500 Subject: [PATCH 3/5] dma: edma: Find missed events and issue them In an effort to move to using Scatter gather lists of any size with EDMA as discussed at [1] instead of placing limitations on the driver, we work through the limitations of the EDMAC hardware to find missed events and issue them. The sequence of events that require this are: For the scenario where MAX slots for an EDMA channel is 3: SG1 -> SG2 -> SG3 -> SG4 -> SG5 -> SG6 -> Null The above SG list will have to be DMA'd in 2 sets: (1) SG1 -> SG2 -> SG3 -> Null (2) SG4 -> SG5 -> SG6 -> Null After (1) is succesfully transferred, the events from the MMC controller donot stop coming and are missed by the time we have setup the transfer for (2). So here, we catch the events missed as an error condition and issue them manually. In the second part of the patch, we make handle the NULL slot cases: For crypto IP, we continue to receive events even continuously in NULL slot, the setup of the next set of SG elements happens after the error handler executes. This is results in some recursion problems. Due to this, we continously receive error interrupts when we manually trigger an event from the error handler. We fix this, by first detecting if the Channel is currently transferring from a NULL slot or not, that's where the edma_read_slot in the error callback from interrupt handler comes in. With this we can determine if the set up of the next SG list has completed, and we manually trigger only in this case. If the setup has _not_ completed, we are still in NULL so we just set a missed flag and allow the manual triggerring to happen in edma_execute which will be eventually called. This fixes the above mentioned race conditions seen with the crypto drivers. [1] http://marc.info/?l=linux-omap&m=137416733628831&w=2 Signed-off-by: Joel Fernandes <joelf(a)ti.com> Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: c5f47990aad87deea42a330433fc57065ac1ade7 Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/dma/edma.c | 50 +++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 49 insertions(+), 1 deletion(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index f5232bc..a70cce3 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -70,6 +70,7 @@ struct edma_chan { int ch_num; bool alloced; int slot[EDMA_MAX_SLOTS]; + int missed; struct dma_slave_config cfg; }; @@ -170,6 +171,20 @@ static void edma_execute(struct edma_chan *echan) dev_dbg(dev, "first transfer starting %d\n", echan->ch_num); edma_start(echan->ch_num); } + + /* + * This happens due to setup times between intermediate transfers + * in long SG lists which have to be broken up into transfers of + * MAX_NR_SG + */ + if (echan->missed) { + dev_dbg(dev, "missed event in execute detected\n"); + edma_clean_channel(echan->ch_num); + edma_stop(echan->ch_num); + edma_start(echan->ch_num); + edma_trigger_channel(echan->ch_num); + echan->missed = 0; + } } static int edma_terminate_all(struct edma_chan *echan) @@ -387,6 +402,7 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) struct device *dev = echan->vchan.chan.device->dev; struct edma_desc *edesc; unsigned long flags; + struct edmacc_param p; /* Pause the channel */ edma_pause(echan->ch_num); @@ -412,7 +428,39 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) break; case DMA_CC_ERROR: - dev_dbg(dev, "transfer error on channel %d\n", ch_num); + spin_lock_irqsave(&echan->vchan.lock, flags); + + edma_read_slot(EDMA_CHAN_SLOT(echan->slot[0]), &p); + + /* + * Issue later based on missed flag which will be sure + * to happen as: + * (1) we finished transmitting an intermediate slot and + * edma_execute is coming up. + * (2) or we finished current transfer and issue will + * call edma_execute. + * + * Important note: issuing can be dangerous here and + * lead to some nasty recursion when we are in a NULL + * slot. So we avoid doing so and set the missed flag. + */ + if (p.a_b_cnt == 0 && p.ccnt == 0) { + dev_dbg(dev, "Error occurred, looks like slot is null, just setting miss\n"); + echan->missed = 1; + } else { + /* + * The slot is already programmed but the event got + * missed, so its safe to issue it here. + */ + dev_dbg(dev, "Error occurred but slot is non-null, TRIGGERING\n"); + edma_clean_channel(echan->ch_num); + edma_stop(echan->ch_num); + edma_start(echan->ch_num); + edma_trigger_channel(echan->ch_num); + } + + spin_unlock_irqrestore(&echan->vchan.lock, flags); + break; default: break; -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 6/9] dma: edma: Write out and handle MAX_NR_SG at a given time
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From ed8e3d3a6a0abe71d125c615a92a01a150c53e15 Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Tue, 3 Sep 2013 10:02:46 -0500 Subject: [PATCH 2/5] dma: edma: Write out and handle MAX_NR_SG at a given time Process SG-elements in batches of MAX_NR_SG if they are greater than MAX_NR_SG. Due to this, at any given time only those many slots will be used in the given channel no matter how long the scatter list is. We keep track of how much has been written inorder to process the next batch of elements in the scatter-list and detect completion. For such intermediate transfer completions (one batch of MAX_NR_SG), make use of pause and resume functions instead of start and stop when such intermediate transfer is in progress or completed as we donot want to clear any pending events. Signed-off-by: Joel Fernandes <joelf(a)ti.com> Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: 534070622d2c7fbc5cc929aa93541ccd0ae52ab1 Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/dma/edma.c | 77 ++++++++++++++++++++++++++++++++++++------------------ 1 file changed, 51 insertions(+), 26 deletions(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index e522ad5..f5232bc 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -56,6 +56,7 @@ struct edma_desc { struct list_head node; int absync; int pset_nr; + int processed; struct edmacc_param pset[0]; }; @@ -104,22 +105,34 @@ static void edma_desc_free(struct virt_dma_desc *vdesc) /* Dispatch a queued descriptor to the controller (caller holds lock) */ static void edma_execute(struct edma_chan *echan) { - struct virt_dma_desc *vdesc = vchan_next_desc(&echan->vchan); + struct virt_dma_desc *vdesc; struct edma_desc *edesc; - int i; - - if (!vdesc) { - echan->edesc = NULL; - return; + struct device *dev = echan->vchan.chan.device->dev; + int i, j, left, nslots; + + /* If either we processed all psets or we're still not started */ + if (!echan->edesc || + echan->edesc->pset_nr == echan->edesc->processed) { + /* Get next vdesc */ + vdesc = vchan_next_desc(&echan->vchan); + if (!vdesc) { + echan->edesc = NULL; + return; + } + list_del(&vdesc->node); + echan->edesc = to_edma_desc(&vdesc->tx); } - list_del(&vdesc->node); + edesc = echan->edesc; - echan->edesc = edesc = to_edma_desc(&vdesc->tx); + /* Find out how many left */ + left = edesc->pset_nr - edesc->processed; + nslots = min(MAX_NR_SG, left); /* Write descriptor PaRAM set(s) */ - for (i = 0; i < edesc->pset_nr; i++) { - edma_write_slot(echan->slot[i], &edesc->pset[i]); + for (i = 0; i < nslots; i++) { + j = i + edesc->processed; + edma_write_slot(echan->slot[i], &edesc->pset[j]); dev_dbg(echan->vchan.chan.device->dev, "\n pset[%d]:\n" " chnum\t%d\n" @@ -132,24 +145,31 @@ static void edma_execute(struct edma_chan *echan) " bidx\t%08x\n" " cidx\t%08x\n" " lkrld\t%08x\n", - i, echan->ch_num, echan->slot[i], - edesc->pset[i].opt, - edesc->pset[i].src, - edesc->pset[i].dst, - edesc->pset[i].a_b_cnt, - edesc->pset[i].ccnt, - edesc->pset[i].src_dst_bidx, - edesc->pset[i].src_dst_cidx, - edesc->pset[i].link_bcntrld); + j, echan->ch_num, echan->slot[i], + edesc->pset[j].opt, + edesc->pset[j].src, + edesc->pset[j].dst, + edesc->pset[j].a_b_cnt, + edesc->pset[j].ccnt, + edesc->pset[j].src_dst_bidx, + edesc->pset[j].src_dst_cidx, + edesc->pset[j].link_bcntrld); /* Link to the previous slot if not the last set */ - if (i != (edesc->pset_nr - 1)) + if (i != (nslots - 1)) edma_link(echan->slot[i], echan->slot[i+1]); /* Final pset links to the dummy pset */ else edma_link(echan->slot[i], echan->ecc->dummy_slot); } - edma_start(echan->ch_num); + edesc->processed += nslots; + + edma_resume(echan->ch_num); + + if (edesc->processed <= MAX_NR_SG) { + dev_dbg(dev, "first transfer starting %d\n", echan->ch_num); + edma_start(echan->ch_num); + } } static int edma_terminate_all(struct edma_chan *echan) @@ -368,19 +388,24 @@ static void edma_callback(unsigned ch_num, u16 ch_status, void *data) struct edma_desc *edesc; unsigned long flags; - /* Stop the channel */ - edma_stop(echan->ch_num); + /* Pause the channel */ + edma_pause(echan->ch_num); switch (ch_status) { case DMA_COMPLETE: - dev_dbg(dev, "transfer complete on channel %d\n", ch_num); - spin_lock_irqsave(&echan->vchan.lock, flags); edesc = echan->edesc; if (edesc) { + if (edesc->processed == edesc->pset_nr) { + dev_dbg(dev, "Transfer complete, stopping channel %d\n", ch_num); + edma_stop(echan->ch_num); + vchan_cookie_complete(&edesc->vdesc); + } else { + dev_dbg(dev, "Intermediate transfer complete on channel %d\n", ch_num); + } + edma_execute(echan); - vchan_cookie_complete(&edesc->vdesc); } spin_unlock_irqrestore(&echan->vchan.lock, flags); -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 5/9] dma: edma: Setup parameters to DMA MAX_NR_SG at a time
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From 3a5f556d9dac3d1a3e3e46e61d0626e2a2304592 Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 29 Aug 2013 18:05:40 -0500 Subject: [PATCH 1/5] dma: edma: Setup parameters to DMA MAX_NR_SG at a time Changes are made here for configuring existing parameters to support DMA'ing them out in batches as needed. Also allocate as many as slots as needed by the SG list, but not more than MAX_NR_SG. Then these slots will be reused accordingly. For ex, if MAX_NR_SG=10, and number of SG entries is 40, still only 10 slots will be allocated to DMA the entire SG list of size 40. Also enable TC interrupts for slots that are a last in a current iteration, or that fall on a MAX_NR_SG boundary. Signed-off-by: Joel Fernandes <joelf(a)ti.com> Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: 6fbe24da828ff344372c38441156caefc4a51b3e Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/dma/edma.c | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c index 5f3e532..e522ad5 100644 --- a/drivers/dma/edma.c +++ b/drivers/dma/edma.c @@ -222,9 +222,9 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( enum dma_slave_buswidth dev_width; u32 burst; struct scatterlist *sg; - int i; int acnt, bcnt, ccnt, src, dst, cidx; int src_bidx, dst_bidx, src_cidx, dst_cidx; + int i, nslots; if (unlikely(!echan || !sgl || !sg_len)) return NULL; @@ -262,8 +262,10 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( edesc->pset_nr = sg_len; - for_each_sg(sgl, sg, sg_len, i) { - /* Allocate a PaRAM slot, if needed */ + /* Allocate a PaRAM slot, if needed */ + nslots = min_t(unsigned, MAX_NR_SG, sg_len); + + for (i = 0; i < nslots; i++) { if (echan->slot[i] < 0) { echan->slot[i] = edma_alloc_slot(EDMA_CTLR(echan->ch_num), @@ -273,6 +275,10 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( return NULL; } } + } + + /* Configure PaRAM sets for each SG */ + for_each_sg(sgl, sg, sg_len, i) { acnt = dev_width; @@ -330,6 +336,12 @@ static struct dma_async_tx_descriptor *edma_prep_slave_sg( /* Configure A or AB synchronized transfers */ if (edesc->absync) edesc->pset[i].opt |= SYNCDIM; + + /* If this is the last in a current SG set of transactions, + enable interrupts so that next set is processed */ + if (!((i+1) % MAX_NR_SG)) + edesc->pset[i].opt |= TCINTEN; + /* If this is the last set, enable completion interrupt flag */ if (i == sg_len - 1) edesc->pset[i].opt |= TCINTEN; -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 4/9] ARM: edma: Add function to manually trigger an EDMA
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From d80dc7b8f341a84e5c42471af6088adef1c93ddb Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 29 Aug 2013 18:05:42 -0500 Subject: [PATCH 1/6] ARM: edma: Add function to manually trigger an EDMA channel Manual trigger for events missed as a result of splitting a scatter gather list and DMA'ing it in batches. Add a helper function to trigger a channel incase any such events are missed. Signed-off-by: Joel Fernandes <joelf(a)ti.com> Acked-by: Sekhar Nori <nsekhar(a)ti.com> Signed-off-by: Vinod Koul <vinod.koul(a)intel.com> Git-commit: 96874b9a241c543e2f32d7bd7100af4416522cfb Patch-mainline: v3.12-rc1 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- arch/arm/common/edma.c | 17 +++++++++++++++++ include/linux/platform_data/edma.h | 2 ++ 2 files changed, 19 insertions(+) diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index 4e92661..8e1a024 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -1264,6 +1264,23 @@ void edma_resume(unsigned channel) } EXPORT_SYMBOL(edma_resume); +int edma_trigger_channel(unsigned channel) +{ + unsigned ctlr; + unsigned int mask; + + ctlr = EDMA_CTLR(channel); + channel = EDMA_CHAN_SLOT(channel); + mask = BIT(channel & 0x1f); + + edma_shadow0_write_array(ctlr, SH_ESR, (channel >> 5), mask); + + pr_debug("EDMA: ESR%d %08x\n", (channel >> 5), + edma_shadow0_read_array(ctlr, SH_ESR, (channel >> 5))); + return 0; +} +EXPORT_SYMBOL(edma_trigger_channel); + /** * edma_start - start dma on a channel * @channel: channel being activated diff --git a/include/linux/platform_data/edma.h b/include/linux/platform_data/edma.h index 57300fd..179fb91 100644 --- a/include/linux/platform_data/edma.h +++ b/include/linux/platform_data/edma.h @@ -180,4 +180,6 @@ struct edma_soc_info { const s16 (*xbar_chans)[2]; }; +int edma_trigger_channel(unsigned); + #endif -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 3/9] ARM: edma: Fix clearing of unused list for DT DMA resources
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From 46720b99b43d35f1a465a0e1757cc329734018fd Mon Sep 17 00:00:00 2001 From: Joel Fernandes <joelf(a)ti.com> Date: Thu, 26 Sep 2013 16:55:46 -0500 Subject: [PATCH] ARM: edma: Fix clearing of unused list for DT DMA resources HWMOD removal for MMC is breaking edma_start as the events are being manually triggered due to unused channel list not being clear. The above issue is fixed by reading the "dmas" property from the DT node if it exists and clearing the bits in the unused channel list if the dma controller used by any device is EDMA. For this purpose we use the of_* helpers to parse the arguments in the dmas phandle list. Also introduced is a minor clean up of a checkpatch error in old code. Reviewed-by: Sekhar Nori <nsekhar(a)ti.com> Reported-by: Balaji T K <balajitk(a)ti.com> Cc: Sekhar Nori <nsekhar(a)ti.com> Cc: Tony Lindgren <tony(a)atomide.com> Cc: Olof Johansson <olof(a)lixom.net> Cc: Nishanth Menon <nm(a)ti.com> Cc: Pantel Antoniou <panto(a)antoniou-consulting.com> Cc: Jason Kridner <jkridner(a)beagleboard.org> Cc: Koen Kooi <koen(a)dominion.thruhere.net> Signed-off-by: Joel Fernandes <joelf(a)ti.com> Signed-off-by: Olof Johansson <olof(a)lixom.net> Patch-mainline: v3.12 Git-commit: 6cdaca481f6c415025c2687c109674919aa61934 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- arch/arm/common/edma.c | 38 +++++++++++++++++++++++++++++++------- 1 file changed, 31 insertions(+), 7 deletions(-) diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c index 39ad030..4e92661 100644 --- a/arch/arm/common/edma.c +++ b/arch/arm/common/edma.c @@ -269,6 +269,11 @@ static const struct edmacc_param dummy_paramset = { .ccnt = 1, }; +static const struct of_device_id edma_of_ids[] = { + { .compatible = "ti,edma3", }, + {} +}; + /*****************************************************************************/ static void map_dmach_queue(unsigned ctlr, unsigned ch_no, @@ -560,14 +565,38 @@ static int reserve_contiguous_slots(int ctlr, unsigned int id, static int prepare_unused_channel_list(struct device *dev, void *data) { struct platform_device *pdev = to_platform_device(dev); - int i, ctlr; + int i, count, ctlr; + struct of_phandle_args dma_spec; + if (dev->of_node) { + count = of_property_count_strings(dev->of_node, "dma-names"); + if (count < 0) + return 0; + for (i = 0; i < count; i++) { + if (of_parse_phandle_with_args(dev->of_node, "dmas", + "#dma-cells", i, + &dma_spec)) + continue; + + if (!of_match_node(edma_of_ids, dma_spec.np)) { + of_node_put(dma_spec.np); + continue; + } + + clear_bit(EDMA_CHAN_SLOT(dma_spec.args[0]), + edma_cc[0]->edma_unused); + of_node_put(dma_spec.np); + } + return 0; + } + + /* For non-OF case */ for (i = 0; i < pdev->num_resources; i++) { if ((pdev->resource[i].flags & IORESOURCE_DMA) && (int)pdev->resource[i].start >= 0) { ctlr = EDMA_CTLR(pdev->resource[i].start); clear_bit(EDMA_CHAN_SLOT(pdev->resource[i].start), - edma_cc[ctlr]->edma_unused); + edma_cc[ctlr]->edma_unused); } } @@ -1745,11 +1774,6 @@ static int edma_probe(struct platform_device *pdev) return 0; } -static const struct of_device_id edma_of_ids[] = { - { .compatible = "ti,edma3", }, - {} -}; - static struct platform_driver edma_driver = { .driver = { .name = "edma", -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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[opensuse-kernel] [PATCH 2/9] drivers: net: cpsw: fix dt probe for one port ethernet
by matwey.kornilov＠gmail.com 10 Jan '14

10 Jan '14

>From f0c2a08e3016eb48fca29bf92f5a3304a5da2b7b Mon Sep 17 00:00:00 2001 From: Mugunthan V N <mugunthanvnm(a)ti.com> Date: Mon, 2 Dec 2013 12:53:39 +0530 Subject: [PATCH 2/2] drivers: net: cpsw: fix dt probe for one port ethernet When only one port of the two port is pinned out, then dt probe is failing because second port phy is not found. fixing this by checking the number of slaves and breaking the loop. Signed-off-by: Mugunthan V N <mugunthanvnm(a)ti.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Patch-mainline: v3.13-rc4 Git-commit: 3a27bfac17fe375539c4e0a53478679645eb5ae2 Signed-off-by: Matwey V. Kornilov <matwey.kornilov(a)gmail.com> --- drivers/net/ethernet/ti/cpsw.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 6781aea..05738bb 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -1577,6 +1577,8 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, } i++; + if (i == data->slaves) + break; } return 0; -- 1.8.1.4 -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe(a)opensuse.org To contact the owner, e-mail: opensuse-kernel+owner(a)opensuse.org

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