From ac4989874af56435c308bdde9ad9c837a26f8b23 Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Thu, 25 Oct 2012 10:22:32 -0600 Subject: ioat: Fix DMA memory sync direction correct flag ioat does DMA memory sync with DMA_TO_DEVICE direction on a buffer allocated for DMA_FROM_DEVICE dma, resulting in the following warning from dma debug. Fixed the dma_sync_single_for_device() call to use the correct direction. [ 226.288947] WARNING: at lib/dma-debug.c:990 check_sync+0x132/0x550() [ 226.288948] Hardware name: ProLiant DL380p Gen8 [ 226.288951] ioatdma 0000:00:04.0: DMA-API: device driver syncs DMA memory with different direction [device address=0x00000000ffff7000] [size=4096 bytes] [mapped with DMA_FROM_DEVICE] [synced with DMA_TO_DEVICE] [ 226.288953] Modules linked in: iTCO_wdt(+) sb_edac(+) ioatdma(+) microcode serio_raw pcspkr edac_core hpwdt(+) iTCO_vendor_support hpilo(+) dca acpi_power_meter ata_generic pata_acpi sd_mod crc_t10dif ata_piix libata hpsa tg3 netxen_nic(+) sunrpc dm_mirror dm_region_hash dm_log dm_mod [ 226.288967] Pid: 1055, comm: work_for_cpu Tainted: G W 3.3.0-0.20.el7.x86_64 #1 [ 226.288968] Call Trace: [ 226.288974] [] warn_slowpath_common+0x7f/0xc0 [ 226.288977] [] warn_slowpath_fmt+0x46/0x50 [ 226.288980] [] check_sync+0x132/0x550 [ 226.288983] [] debug_dma_sync_single_for_device+0x3f/0x50 [ 226.288988] [] ? wait_for_common+0x72/0x180 [ 226.288995] [] ioat_xor_val_self_test+0x3e5/0x832 [ioatdma] [ 226.288999] [] ? kfree+0x259/0x270 [ 226.289004] [] ioat3_dma_self_test+0x1b/0x20 [ioatdma] [ 226.289008] [] ioat_probe+0x2f8/0x348 [ioatdma] [ 226.289011] [] ioat3_dma_probe+0x1d5/0x2aa [ioatdma] [ 226.289016] [] ioat_pci_probe+0x139/0x17c [ioatdma] [ 226.289020] [] local_pci_probe+0x5c/0xd0 [ 226.289023] [] ? destroy_work_on_stack+0x20/0x20 [ 226.289025] [] do_work_for_cpu+0x18/0x30 [ 226.289029] [] kthread+0xb7/0xc0 [ 226.289033] [] kernel_thread_helper+0x4/0x10 [ 226.289036] [] ? _raw_spin_unlock_irq+0x30/0x50 [ 226.289038] [] ? retint_restore_args+0x13/0x13 [ 226.289041] [] ? kthread_worker_fn+0x1a0/0x1a0 [ 226.289044] [] ? gs_change+0x13/0x13 [ 226.289045] ---[ end trace e1618afc7a606089 ]--- [ 226.289047] Mapped at: [ 226.289048] [] debug_dma_map_page+0x87/0x150 [ 226.289050] [] dma_map_page.constprop.18+0x70/0xb34 [ioatdma] [ 226.289054] [] ioat_xor_val_self_test+0x1d8/0x832 [ioatdma] [ 226.289058] [] ioat3_dma_self_test+0x1b/0x20 [ioatdma] [ 226.289061] [] ioat_probe+0x2f8/0x348 [ioatdma] Signed-off-by: Shuah Khan CC: Signed-off-by: Vinod Koul --- drivers/dma/ioat/dma_v3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index f7f1dc62c15..ed0e8b796a9 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -951,7 +951,7 @@ static int __devinit ioat_xor_val_self_test(struct ioatdma_device *device) goto free_resources; } } - dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_TO_DEVICE); + dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE); /* skip validate if the capability is not present */ if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask)) -- cgit v1.2.3-70-g09d2 From bef2a8d3f6cb91bc8743bdd63d3eb6a37bf27b12 Mon Sep 17 00:00:00 2001 From: Javier Martin Date: Tue, 30 Oct 2012 15:58:50 +0000 Subject: dmaengine: imx-dma: Disable use of hw_chain to fix sg_dma transfers. HW chaining is currently broken in imx-dma. It can be easily reproduced doing intensive accesses to a external MMC card and checking how the file system is corrupted. Preventing the driver to use HW chaining solves these issues. Signed-off-by: Javier Martin Signed-off-by: Vinod Koul --- drivers/dma/imx-dma.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c index dbf0e6f8de8..a7dcf78b1ff 100644 --- a/drivers/dma/imx-dma.c +++ b/drivers/dma/imx-dma.c @@ -684,9 +684,8 @@ static int imxdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, break; } - imxdmac->hw_chaining = 1; - if (!imxdma_hw_chain(imxdmac)) - return -EINVAL; + imxdmac->hw_chaining = 0; + imxdmac->ccr_from_device = (mode | IMX_DMA_TYPE_FIFO) | ((IMX_DMA_MEMSIZE_32 | IMX_DMA_TYPE_LINEAR) << 2) | CCR_REN; -- cgit v1.2.3-70-g09d2 From b9bb37f5486ba05d2b557dbf1aeb754fef618985 Mon Sep 17 00:00:00 2001 From: Laxman Dewangan Date: Wed, 9 Jan 2013 15:26:22 +0530 Subject: dma: tegra: implement flags parameters for cyclic transfer The flag parameter is added in the cyclic transfer request. Use the flag option of: - DMA_PREP_INTERRUPT for enabling interrupt. - DMA_CTRL_ACK for deciding whether ack is requred or not for descriptor. Signed-off-by: Laxman Dewangan CC: Signed-off-by: Vinod Koul --- drivers/dma/tegra20-apb-dma.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index efdfffa1334..bf58bb8b020 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -266,6 +266,7 @@ static struct tegra_dma_desc *tegra_dma_desc_get( if (async_tx_test_ack(&dma_desc->txd)) { list_del(&dma_desc->node); spin_unlock_irqrestore(&tdc->lock, flags); + dma_desc->txd.flags = 0; return dma_desc; } } @@ -1050,7 +1051,9 @@ struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic( TEGRA_APBDMA_AHBSEQ_WRAP_SHIFT; ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32; - csr |= TEGRA_APBDMA_CSR_FLOW | TEGRA_APBDMA_CSR_IE_EOC; + csr |= TEGRA_APBDMA_CSR_FLOW; + if (flags & DMA_PREP_INTERRUPT) + csr |= TEGRA_APBDMA_CSR_IE_EOC; csr |= tdc->dma_sconfig.slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1; @@ -1095,7 +1098,8 @@ struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic( mem += len; } sg_req->last_sg = true; - dma_desc->txd.flags = 0; + if (flags & DMA_CTRL_ACK) + dma_desc->txd.flags = DMA_CTRL_ACK; /* * Make sure that mode should not be conflicting with currently -- cgit v1.2.3-70-g09d2