diff options
Diffstat (limited to 'drivers/dma/qcom/hidma_ll.c')
| -rw-r--r-- | drivers/dma/qcom/hidma_ll.c | 38 |
1 files changed, 14 insertions, 24 deletions
diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c index 1530a661518d..53244e0e34a3 100644 --- a/drivers/dma/qcom/hidma_ll.c +++ b/drivers/dma/qcom/hidma_ll.c @@ -1,16 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Qualcomm Technologies HIDMA DMA engine low level code * * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. */ #include <linux/dmaengine.h> @@ -105,10 +97,6 @@ enum ch_state { HIDMA_CH_STOPPED = 4, }; -enum tre_type { - HIDMA_TRE_MEMCPY = 3, -}; - enum err_code { HIDMA_EVRE_STATUS_COMPLETE = 1, HIDMA_EVRE_STATUS_ERROR = 4, @@ -174,8 +162,7 @@ int hidma_ll_request(struct hidma_lldev *lldev, u32 sig, const char *dev_name, tre->err_info = 0; tre->lldev = lldev; tre_local = &tre->tre_local[0]; - tre_local[HIDMA_TRE_CFG_IDX] = HIDMA_TRE_MEMCPY; - tre_local[HIDMA_TRE_CFG_IDX] |= (lldev->chidx & 0xFF) << 8; + tre_local[HIDMA_TRE_CFG_IDX] = (lldev->chidx & 0xFF) << 8; tre_local[HIDMA_TRE_CFG_IDX] |= BIT(16); /* set IEOB */ *tre_ch = i; if (callback) @@ -186,9 +173,9 @@ int hidma_ll_request(struct hidma_lldev *lldev, u32 sig, const char *dev_name, /* * Multiple TREs may be queued and waiting in the pending queue. */ -static void hidma_ll_tre_complete(unsigned long arg) +static void hidma_ll_tre_complete(struct tasklet_struct *t) { - struct hidma_lldev *lldev = (struct hidma_lldev *)arg; + struct hidma_lldev *lldev = from_tasklet(lldev, t, task); struct hidma_tre *tre; while (kfifo_out(&lldev->handoff_fifo, &tre, 1)) { @@ -398,6 +385,8 @@ static int hidma_ll_reset(struct hidma_lldev *lldev) */ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause) { + unsigned long irqflags; + if (cause & HIDMA_ERR_INT_MASK) { dev_err(lldev->dev, "error 0x%x, disabling...\n", cause); @@ -415,6 +404,10 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause) return; } + spin_lock_irqsave(&lldev->lock, irqflags); + writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); + spin_unlock_irqrestore(&lldev->lock, irqflags); + /* * Fine tuned for this HW... * @@ -426,9 +419,6 @@ static void hidma_ll_int_handler_internal(struct hidma_lldev *lldev, int cause) * Try to consume as many EVREs as possible. */ hidma_handle_tre_completion(lldev); - - /* We consumed TREs or there are pending TREs or EVREs. */ - writel_relaxed(cause, lldev->evca + HIDMA_EVCA_IRQ_CLR_REG); } irqreturn_t hidma_ll_inthandler(int chirq, void *arg) @@ -607,7 +597,7 @@ int hidma_ll_disable(struct hidma_lldev *lldev) void hidma_ll_set_transfer_params(struct hidma_lldev *lldev, u32 tre_ch, dma_addr_t src, dma_addr_t dest, u32 len, - u32 flags) + u32 flags, u32 txntype) { struct hidma_tre *tre; u32 *tre_local; @@ -626,6 +616,8 @@ void hidma_ll_set_transfer_params(struct hidma_lldev *lldev, u32 tre_ch, } tre_local = &tre->tre_local[0]; + tre_local[HIDMA_TRE_CFG_IDX] &= ~GENMASK(7, 0); + tre_local[HIDMA_TRE_CFG_IDX] |= txntype; tre_local[HIDMA_TRE_LEN_IDX] = len; tre_local[HIDMA_TRE_SRC_LOW_IDX] = lower_32_bits(src); tre_local[HIDMA_TRE_SRC_HI_IDX] = upper_32_bits(src); @@ -757,7 +749,6 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres, if (!lldev->tre_ring) return NULL; - memset(lldev->tre_ring, 0, (HIDMA_TRE_SIZE + 1) * nr_tres); lldev->tre_ring_size = HIDMA_TRE_SIZE * nr_tres; lldev->nr_tres = nr_tres; @@ -777,7 +768,6 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres, if (!lldev->evre_ring) return NULL; - memset(lldev->evre_ring, 0, (HIDMA_EVRE_SIZE + 1) * nr_tres); lldev->evre_ring_size = HIDMA_EVRE_SIZE * nr_tres; /* the EVRE ring has to be EVRE_SIZE aligned */ @@ -802,7 +792,7 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres, return NULL; spin_lock_init(&lldev->lock); - tasklet_init(&lldev->task, hidma_ll_tre_complete, (unsigned long)lldev); + tasklet_setup(&lldev->task, hidma_ll_tre_complete); lldev->initialized = 1; writel(ENABLE_IRQS, lldev->evca + HIDMA_EVCA_IRQ_EN_REG); return lldev; |