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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Chen Zhou](/assets/img/avatar_default.png)
There is duplicated argument to && in function fsl_qdma_free_chan_resources,
which looks like a typo, pointer fsl_queue->desc_pool also needs NULL check,
fix it.
Detected with coccinelle.
Fixes: b092529e0a
("dmaengine: fsl-qdma: Add qDMA controller driver for Layerscape SoCs")
Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
Reviewed-by: Peng Ma <peng.ma@nxp.com>
Tested-by: Peng Ma <peng.ma@nxp.com>
Link: https://lore.kernel.org/r/20200120125843.34398-1-chenzhou10@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
1257 lines
34 KiB
C
1257 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0
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// Copyright 2014-2015 Freescale
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// Copyright 2018 NXP
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/*
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* Driver for NXP Layerscape Queue Direct Memory Access Controller
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*
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* Author:
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* Wen He <wen.he_1@nxp.com>
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* Jiaheng Fan <jiaheng.fan@nxp.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <linux/of_dma.h>
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#include <linux/dma-mapping.h>
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#include "virt-dma.h"
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#include "fsldma.h"
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/* Register related definition */
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#define FSL_QDMA_DMR 0x0
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#define FSL_QDMA_DSR 0x4
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#define FSL_QDMA_DEIER 0xe00
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#define FSL_QDMA_DEDR 0xe04
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#define FSL_QDMA_DECFDW0R 0xe10
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#define FSL_QDMA_DECFDW1R 0xe14
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#define FSL_QDMA_DECFDW2R 0xe18
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#define FSL_QDMA_DECFDW3R 0xe1c
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#define FSL_QDMA_DECFQIDR 0xe30
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#define FSL_QDMA_DECBR 0xe34
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#define FSL_QDMA_BCQMR(x) (0xc0 + 0x100 * (x))
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#define FSL_QDMA_BCQSR(x) (0xc4 + 0x100 * (x))
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#define FSL_QDMA_BCQEDPA_SADDR(x) (0xc8 + 0x100 * (x))
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#define FSL_QDMA_BCQDPA_SADDR(x) (0xcc + 0x100 * (x))
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#define FSL_QDMA_BCQEEPA_SADDR(x) (0xd0 + 0x100 * (x))
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#define FSL_QDMA_BCQEPA_SADDR(x) (0xd4 + 0x100 * (x))
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#define FSL_QDMA_BCQIER(x) (0xe0 + 0x100 * (x))
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#define FSL_QDMA_BCQIDR(x) (0xe4 + 0x100 * (x))
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#define FSL_QDMA_SQDPAR 0x80c
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#define FSL_QDMA_SQEPAR 0x814
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#define FSL_QDMA_BSQMR 0x800
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#define FSL_QDMA_BSQSR 0x804
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#define FSL_QDMA_BSQICR 0x828
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#define FSL_QDMA_CQMR 0xa00
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#define FSL_QDMA_CQDSCR1 0xa08
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#define FSL_QDMA_CQDSCR2 0xa0c
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#define FSL_QDMA_CQIER 0xa10
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#define FSL_QDMA_CQEDR 0xa14
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#define FSL_QDMA_SQCCMR 0xa20
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/* Registers for bit and genmask */
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#define FSL_QDMA_CQIDR_SQT BIT(15)
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#define QDMA_CCDF_FOTMAT BIT(29)
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#define QDMA_CCDF_SER BIT(30)
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#define QDMA_SG_FIN BIT(30)
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#define QDMA_SG_LEN_MASK GENMASK(29, 0)
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#define QDMA_CCDF_MASK GENMASK(28, 20)
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#define FSL_QDMA_DEDR_CLEAR GENMASK(31, 0)
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#define FSL_QDMA_BCQIDR_CLEAR GENMASK(31, 0)
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#define FSL_QDMA_DEIER_CLEAR GENMASK(31, 0)
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#define FSL_QDMA_BCQIER_CQTIE BIT(15)
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#define FSL_QDMA_BCQIER_CQPEIE BIT(23)
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#define FSL_QDMA_BSQICR_ICEN BIT(31)
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#define FSL_QDMA_BSQICR_ICST(x) ((x) << 16)
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#define FSL_QDMA_CQIER_MEIE BIT(31)
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#define FSL_QDMA_CQIER_TEIE BIT(0)
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#define FSL_QDMA_SQCCMR_ENTER_WM BIT(21)
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#define FSL_QDMA_BCQMR_EN BIT(31)
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#define FSL_QDMA_BCQMR_EI BIT(30)
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#define FSL_QDMA_BCQMR_CD_THLD(x) ((x) << 20)
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#define FSL_QDMA_BCQMR_CQ_SIZE(x) ((x) << 16)
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#define FSL_QDMA_BCQSR_QF BIT(16)
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#define FSL_QDMA_BCQSR_XOFF BIT(0)
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#define FSL_QDMA_BSQMR_EN BIT(31)
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#define FSL_QDMA_BSQMR_DI BIT(30)
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#define FSL_QDMA_BSQMR_CQ_SIZE(x) ((x) << 16)
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#define FSL_QDMA_BSQSR_QE BIT(17)
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#define FSL_QDMA_DMR_DQD BIT(30)
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#define FSL_QDMA_DSR_DB BIT(31)
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/* Size related definition */
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#define FSL_QDMA_QUEUE_MAX 8
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#define FSL_QDMA_COMMAND_BUFFER_SIZE 64
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#define FSL_QDMA_DESCRIPTOR_BUFFER_SIZE 32
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#define FSL_QDMA_CIRCULAR_DESC_SIZE_MIN 64
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#define FSL_QDMA_CIRCULAR_DESC_SIZE_MAX 16384
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#define FSL_QDMA_QUEUE_NUM_MAX 8
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/* Field definition for CMD */
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#define FSL_QDMA_CMD_RWTTYPE 0x4
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#define FSL_QDMA_CMD_LWC 0x2
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#define FSL_QDMA_CMD_RWTTYPE_OFFSET 28
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#define FSL_QDMA_CMD_NS_OFFSET 27
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#define FSL_QDMA_CMD_DQOS_OFFSET 24
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#define FSL_QDMA_CMD_WTHROTL_OFFSET 20
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#define FSL_QDMA_CMD_DSEN_OFFSET 19
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#define FSL_QDMA_CMD_LWC_OFFSET 16
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/* Field definition for Descriptor offset */
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#define QDMA_CCDF_STATUS 20
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#define QDMA_CCDF_OFFSET 20
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#define QDMA_SDDF_CMD(x) (((u64)(x)) << 32)
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/* Field definition for safe loop count*/
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#define FSL_QDMA_HALT_COUNT 1500
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#define FSL_QDMA_MAX_SIZE 16385
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#define FSL_QDMA_COMP_TIMEOUT 1000
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#define FSL_COMMAND_QUEUE_OVERFLLOW 10
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#define FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma_engine, x) \
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(((fsl_qdma_engine)->block_offset) * (x))
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/**
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* struct fsl_qdma_format - This is the struct holding describing compound
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* descriptor format with qDMA.
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* @status: Command status and enqueue status notification.
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* @cfg: Frame offset and frame format.
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* @addr_lo: Holding the compound descriptor of the lower
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* 32-bits address in memory 40-bit address.
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* @addr_hi: Same as above member, but point high 8-bits in
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* memory 40-bit address.
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* @__reserved1: Reserved field.
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* @cfg8b_w1: Compound descriptor command queue origin produced
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* by qDMA and dynamic debug field.
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* @data Pointer to the memory 40-bit address, describes DMA
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* source information and DMA destination information.
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*/
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struct fsl_qdma_format {
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__le32 status;
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__le32 cfg;
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union {
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struct {
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__le32 addr_lo;
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u8 addr_hi;
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u8 __reserved1[2];
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u8 cfg8b_w1;
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} __packed;
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__le64 data;
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};
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} __packed;
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/* qDMA status notification pre information */
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struct fsl_pre_status {
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u64 addr;
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u8 queue;
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};
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static DEFINE_PER_CPU(struct fsl_pre_status, pre);
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struct fsl_qdma_chan {
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struct virt_dma_chan vchan;
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struct virt_dma_desc vdesc;
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enum dma_status status;
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struct fsl_qdma_engine *qdma;
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struct fsl_qdma_queue *queue;
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};
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struct fsl_qdma_queue {
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struct fsl_qdma_format *virt_head;
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struct fsl_qdma_format *virt_tail;
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struct list_head comp_used;
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struct list_head comp_free;
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struct dma_pool *comp_pool;
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struct dma_pool *desc_pool;
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spinlock_t queue_lock;
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dma_addr_t bus_addr;
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u32 n_cq;
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u32 id;
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struct fsl_qdma_format *cq;
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void __iomem *block_base;
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};
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struct fsl_qdma_comp {
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dma_addr_t bus_addr;
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dma_addr_t desc_bus_addr;
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struct fsl_qdma_format *virt_addr;
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struct fsl_qdma_format *desc_virt_addr;
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struct fsl_qdma_chan *qchan;
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struct virt_dma_desc vdesc;
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struct list_head list;
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};
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struct fsl_qdma_engine {
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struct dma_device dma_dev;
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void __iomem *ctrl_base;
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void __iomem *status_base;
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void __iomem *block_base;
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u32 n_chans;
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u32 n_queues;
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struct mutex fsl_qdma_mutex;
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int error_irq;
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int *queue_irq;
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u32 feature;
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struct fsl_qdma_queue *queue;
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struct fsl_qdma_queue **status;
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struct fsl_qdma_chan *chans;
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int block_number;
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int block_offset;
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int irq_base;
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int desc_allocated;
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};
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static inline u64
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qdma_ccdf_addr_get64(const struct fsl_qdma_format *ccdf)
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{
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return le64_to_cpu(ccdf->data) & (U64_MAX >> 24);
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}
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static inline void
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qdma_desc_addr_set64(struct fsl_qdma_format *ccdf, u64 addr)
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{
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ccdf->addr_hi = upper_32_bits(addr);
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ccdf->addr_lo = cpu_to_le32(lower_32_bits(addr));
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}
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static inline u8
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qdma_ccdf_get_queue(const struct fsl_qdma_format *ccdf)
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{
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return ccdf->cfg8b_w1 & U8_MAX;
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}
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static inline int
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qdma_ccdf_get_offset(const struct fsl_qdma_format *ccdf)
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{
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return (le32_to_cpu(ccdf->cfg) & QDMA_CCDF_MASK) >> QDMA_CCDF_OFFSET;
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}
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static inline void
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qdma_ccdf_set_format(struct fsl_qdma_format *ccdf, int offset)
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{
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ccdf->cfg = cpu_to_le32(QDMA_CCDF_FOTMAT | offset);
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}
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static inline int
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qdma_ccdf_get_status(const struct fsl_qdma_format *ccdf)
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{
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return (le32_to_cpu(ccdf->status) & QDMA_CCDF_MASK) >> QDMA_CCDF_STATUS;
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}
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static inline void
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qdma_ccdf_set_ser(struct fsl_qdma_format *ccdf, int status)
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{
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ccdf->status = cpu_to_le32(QDMA_CCDF_SER | status);
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}
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static inline void qdma_csgf_set_len(struct fsl_qdma_format *csgf, int len)
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{
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csgf->cfg = cpu_to_le32(len & QDMA_SG_LEN_MASK);
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}
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static inline void qdma_csgf_set_f(struct fsl_qdma_format *csgf, int len)
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{
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csgf->cfg = cpu_to_le32(QDMA_SG_FIN | (len & QDMA_SG_LEN_MASK));
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}
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static u32 qdma_readl(struct fsl_qdma_engine *qdma, void __iomem *addr)
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{
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return FSL_DMA_IN(qdma, addr, 32);
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}
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static void qdma_writel(struct fsl_qdma_engine *qdma, u32 val,
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void __iomem *addr)
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{
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FSL_DMA_OUT(qdma, addr, val, 32);
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}
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static struct fsl_qdma_chan *to_fsl_qdma_chan(struct dma_chan *chan)
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{
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return container_of(chan, struct fsl_qdma_chan, vchan.chan);
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}
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static struct fsl_qdma_comp *to_fsl_qdma_comp(struct virt_dma_desc *vd)
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{
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return container_of(vd, struct fsl_qdma_comp, vdesc);
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}
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static void fsl_qdma_free_chan_resources(struct dma_chan *chan)
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{
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struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
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struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
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struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
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struct fsl_qdma_comp *comp_temp, *_comp_temp;
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unsigned long flags;
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LIST_HEAD(head);
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spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
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vchan_get_all_descriptors(&fsl_chan->vchan, &head);
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spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
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vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
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if (!fsl_queue->comp_pool && !fsl_queue->desc_pool)
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return;
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list_for_each_entry_safe(comp_temp, _comp_temp,
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&fsl_queue->comp_used, list) {
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dma_pool_free(fsl_queue->comp_pool,
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comp_temp->virt_addr,
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comp_temp->bus_addr);
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dma_pool_free(fsl_queue->desc_pool,
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comp_temp->desc_virt_addr,
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comp_temp->desc_bus_addr);
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list_del(&comp_temp->list);
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kfree(comp_temp);
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}
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list_for_each_entry_safe(comp_temp, _comp_temp,
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&fsl_queue->comp_free, list) {
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dma_pool_free(fsl_queue->comp_pool,
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comp_temp->virt_addr,
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comp_temp->bus_addr);
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dma_pool_free(fsl_queue->desc_pool,
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comp_temp->desc_virt_addr,
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comp_temp->desc_bus_addr);
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list_del(&comp_temp->list);
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kfree(comp_temp);
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}
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dma_pool_destroy(fsl_queue->comp_pool);
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dma_pool_destroy(fsl_queue->desc_pool);
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fsl_qdma->desc_allocated--;
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fsl_queue->comp_pool = NULL;
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fsl_queue->desc_pool = NULL;
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}
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static void fsl_qdma_comp_fill_memcpy(struct fsl_qdma_comp *fsl_comp,
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dma_addr_t dst, dma_addr_t src, u32 len)
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{
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u32 cmd;
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struct fsl_qdma_format *sdf, *ddf;
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struct fsl_qdma_format *ccdf, *csgf_desc, *csgf_src, *csgf_dest;
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ccdf = fsl_comp->virt_addr;
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csgf_desc = fsl_comp->virt_addr + 1;
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csgf_src = fsl_comp->virt_addr + 2;
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csgf_dest = fsl_comp->virt_addr + 3;
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sdf = fsl_comp->desc_virt_addr;
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ddf = fsl_comp->desc_virt_addr + 1;
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memset(fsl_comp->virt_addr, 0, FSL_QDMA_COMMAND_BUFFER_SIZE);
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memset(fsl_comp->desc_virt_addr, 0, FSL_QDMA_DESCRIPTOR_BUFFER_SIZE);
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/* Head Command Descriptor(Frame Descriptor) */
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qdma_desc_addr_set64(ccdf, fsl_comp->bus_addr + 16);
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qdma_ccdf_set_format(ccdf, qdma_ccdf_get_offset(ccdf));
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qdma_ccdf_set_ser(ccdf, qdma_ccdf_get_status(ccdf));
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/* Status notification is enqueued to status queue. */
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/* Compound Command Descriptor(Frame List Table) */
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qdma_desc_addr_set64(csgf_desc, fsl_comp->desc_bus_addr);
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/* It must be 32 as Compound S/G Descriptor */
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qdma_csgf_set_len(csgf_desc, 32);
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qdma_desc_addr_set64(csgf_src, src);
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qdma_csgf_set_len(csgf_src, len);
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qdma_desc_addr_set64(csgf_dest, dst);
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qdma_csgf_set_len(csgf_dest, len);
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/* This entry is the last entry. */
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qdma_csgf_set_f(csgf_dest, len);
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/* Descriptor Buffer */
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cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
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FSL_QDMA_CMD_RWTTYPE_OFFSET);
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sdf->data = QDMA_SDDF_CMD(cmd);
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cmd = cpu_to_le32(FSL_QDMA_CMD_RWTTYPE <<
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FSL_QDMA_CMD_RWTTYPE_OFFSET);
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cmd |= cpu_to_le32(FSL_QDMA_CMD_LWC << FSL_QDMA_CMD_LWC_OFFSET);
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ddf->data = QDMA_SDDF_CMD(cmd);
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}
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/*
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* Pre-request full command descriptor for enqueue.
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*/
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static int fsl_qdma_pre_request_enqueue_desc(struct fsl_qdma_queue *queue)
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{
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int i;
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struct fsl_qdma_comp *comp_temp, *_comp_temp;
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for (i = 0; i < queue->n_cq + FSL_COMMAND_QUEUE_OVERFLLOW; i++) {
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comp_temp = kzalloc(sizeof(*comp_temp), GFP_KERNEL);
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if (!comp_temp)
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goto err_alloc;
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comp_temp->virt_addr =
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dma_pool_alloc(queue->comp_pool, GFP_KERNEL,
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&comp_temp->bus_addr);
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if (!comp_temp->virt_addr)
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goto err_dma_alloc;
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comp_temp->desc_virt_addr =
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dma_pool_alloc(queue->desc_pool, GFP_KERNEL,
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&comp_temp->desc_bus_addr);
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if (!comp_temp->desc_virt_addr)
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goto err_desc_dma_alloc;
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list_add_tail(&comp_temp->list, &queue->comp_free);
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}
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return 0;
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err_desc_dma_alloc:
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dma_pool_free(queue->comp_pool, comp_temp->virt_addr,
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comp_temp->bus_addr);
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err_dma_alloc:
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kfree(comp_temp);
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err_alloc:
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list_for_each_entry_safe(comp_temp, _comp_temp,
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&queue->comp_free, list) {
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if (comp_temp->virt_addr)
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dma_pool_free(queue->comp_pool,
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comp_temp->virt_addr,
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comp_temp->bus_addr);
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if (comp_temp->desc_virt_addr)
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dma_pool_free(queue->desc_pool,
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comp_temp->desc_virt_addr,
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|
comp_temp->desc_bus_addr);
|
|
|
|
list_del(&comp_temp->list);
|
|
kfree(comp_temp);
|
|
}
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Request a command descriptor for enqueue.
|
|
*/
|
|
static struct fsl_qdma_comp
|
|
*fsl_qdma_request_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
|
|
{
|
|
unsigned long flags;
|
|
struct fsl_qdma_comp *comp_temp;
|
|
int timeout = FSL_QDMA_COMP_TIMEOUT;
|
|
struct fsl_qdma_queue *queue = fsl_chan->queue;
|
|
|
|
while (timeout--) {
|
|
spin_lock_irqsave(&queue->queue_lock, flags);
|
|
if (!list_empty(&queue->comp_free)) {
|
|
comp_temp = list_first_entry(&queue->comp_free,
|
|
struct fsl_qdma_comp,
|
|
list);
|
|
list_del(&comp_temp->list);
|
|
|
|
spin_unlock_irqrestore(&queue->queue_lock, flags);
|
|
comp_temp->qchan = fsl_chan;
|
|
return comp_temp;
|
|
}
|
|
spin_unlock_irqrestore(&queue->queue_lock, flags);
|
|
udelay(1);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct fsl_qdma_queue
|
|
*fsl_qdma_alloc_queue_resources(struct platform_device *pdev,
|
|
struct fsl_qdma_engine *fsl_qdma)
|
|
{
|
|
int ret, len, i, j;
|
|
int queue_num, block_number;
|
|
unsigned int queue_size[FSL_QDMA_QUEUE_MAX];
|
|
struct fsl_qdma_queue *queue_head, *queue_temp;
|
|
|
|
queue_num = fsl_qdma->n_queues;
|
|
block_number = fsl_qdma->block_number;
|
|
|
|
if (queue_num > FSL_QDMA_QUEUE_MAX)
|
|
queue_num = FSL_QDMA_QUEUE_MAX;
|
|
len = sizeof(*queue_head) * queue_num * block_number;
|
|
queue_head = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
|
|
if (!queue_head)
|
|
return NULL;
|
|
|
|
ret = device_property_read_u32_array(&pdev->dev, "queue-sizes",
|
|
queue_size, queue_num);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get queue-sizes.\n");
|
|
return NULL;
|
|
}
|
|
for (j = 0; j < block_number; j++) {
|
|
for (i = 0; i < queue_num; i++) {
|
|
if (queue_size[i] > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
|
|
queue_size[i] < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
|
|
dev_err(&pdev->dev,
|
|
"Get wrong queue-sizes.\n");
|
|
return NULL;
|
|
}
|
|
queue_temp = queue_head + i + (j * queue_num);
|
|
|
|
queue_temp->cq =
|
|
dma_alloc_coherent(&pdev->dev,
|
|
sizeof(struct fsl_qdma_format) *
|
|
queue_size[i],
|
|
&queue_temp->bus_addr,
|
|
GFP_KERNEL);
|
|
if (!queue_temp->cq)
|
|
return NULL;
|
|
queue_temp->block_base = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
|
|
queue_temp->n_cq = queue_size[i];
|
|
queue_temp->id = i;
|
|
queue_temp->virt_head = queue_temp->cq;
|
|
queue_temp->virt_tail = queue_temp->cq;
|
|
/*
|
|
* List for queue command buffer
|
|
*/
|
|
INIT_LIST_HEAD(&queue_temp->comp_used);
|
|
spin_lock_init(&queue_temp->queue_lock);
|
|
}
|
|
}
|
|
return queue_head;
|
|
}
|
|
|
|
static struct fsl_qdma_queue
|
|
*fsl_qdma_prep_status_queue(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
unsigned int status_size;
|
|
struct fsl_qdma_queue *status_head;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
ret = of_property_read_u32(np, "status-sizes", &status_size);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get status-sizes.\n");
|
|
return NULL;
|
|
}
|
|
if (status_size > FSL_QDMA_CIRCULAR_DESC_SIZE_MAX ||
|
|
status_size < FSL_QDMA_CIRCULAR_DESC_SIZE_MIN) {
|
|
dev_err(&pdev->dev, "Get wrong status_size.\n");
|
|
return NULL;
|
|
}
|
|
status_head = devm_kzalloc(&pdev->dev,
|
|
sizeof(*status_head), GFP_KERNEL);
|
|
if (!status_head)
|
|
return NULL;
|
|
|
|
/*
|
|
* Buffer for queue command
|
|
*/
|
|
status_head->cq = dma_alloc_coherent(&pdev->dev,
|
|
sizeof(struct fsl_qdma_format) *
|
|
status_size,
|
|
&status_head->bus_addr,
|
|
GFP_KERNEL);
|
|
if (!status_head->cq) {
|
|
devm_kfree(&pdev->dev, status_head);
|
|
return NULL;
|
|
}
|
|
status_head->n_cq = status_size;
|
|
status_head->virt_head = status_head->cq;
|
|
status_head->virt_tail = status_head->cq;
|
|
status_head->comp_pool = NULL;
|
|
|
|
return status_head;
|
|
}
|
|
|
|
static int fsl_qdma_halt(struct fsl_qdma_engine *fsl_qdma)
|
|
{
|
|
u32 reg;
|
|
int i, j, count = FSL_QDMA_HALT_COUNT;
|
|
void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
|
|
|
|
/* Disable the command queue and wait for idle state. */
|
|
reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
|
|
reg |= FSL_QDMA_DMR_DQD;
|
|
qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
|
|
for (j = 0; j < fsl_qdma->block_number; j++) {
|
|
block = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
|
|
for (i = 0; i < FSL_QDMA_QUEUE_NUM_MAX; i++)
|
|
qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQMR(i));
|
|
}
|
|
while (1) {
|
|
reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DSR);
|
|
if (!(reg & FSL_QDMA_DSR_DB))
|
|
break;
|
|
if (count-- < 0)
|
|
return -EBUSY;
|
|
udelay(100);
|
|
}
|
|
|
|
for (j = 0; j < fsl_qdma->block_number; j++) {
|
|
block = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
|
|
|
|
/* Disable status queue. */
|
|
qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BSQMR);
|
|
|
|
/*
|
|
* clear the command queue interrupt detect register for
|
|
* all queues.
|
|
*/
|
|
qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
|
|
block + FSL_QDMA_BCQIDR(0));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
fsl_qdma_queue_transfer_complete(struct fsl_qdma_engine *fsl_qdma,
|
|
void *block,
|
|
int id)
|
|
{
|
|
bool duplicate;
|
|
u32 reg, i, count;
|
|
struct fsl_qdma_queue *temp_queue;
|
|
struct fsl_qdma_format *status_addr;
|
|
struct fsl_qdma_comp *fsl_comp = NULL;
|
|
struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
|
|
struct fsl_qdma_queue *fsl_status = fsl_qdma->status[id];
|
|
|
|
count = FSL_QDMA_MAX_SIZE;
|
|
|
|
while (count--) {
|
|
duplicate = 0;
|
|
reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQSR);
|
|
if (reg & FSL_QDMA_BSQSR_QE)
|
|
return 0;
|
|
|
|
status_addr = fsl_status->virt_head;
|
|
|
|
if (qdma_ccdf_get_queue(status_addr) ==
|
|
__this_cpu_read(pre.queue) &&
|
|
qdma_ccdf_addr_get64(status_addr) ==
|
|
__this_cpu_read(pre.addr))
|
|
duplicate = 1;
|
|
i = qdma_ccdf_get_queue(status_addr) +
|
|
id * fsl_qdma->n_queues;
|
|
__this_cpu_write(pre.addr, qdma_ccdf_addr_get64(status_addr));
|
|
__this_cpu_write(pre.queue, qdma_ccdf_get_queue(status_addr));
|
|
temp_queue = fsl_queue + i;
|
|
|
|
spin_lock(&temp_queue->queue_lock);
|
|
if (list_empty(&temp_queue->comp_used)) {
|
|
if (!duplicate) {
|
|
spin_unlock(&temp_queue->queue_lock);
|
|
return -EAGAIN;
|
|
}
|
|
} else {
|
|
fsl_comp = list_first_entry(&temp_queue->comp_used,
|
|
struct fsl_qdma_comp, list);
|
|
if (fsl_comp->bus_addr + 16 !=
|
|
__this_cpu_read(pre.addr)) {
|
|
if (!duplicate) {
|
|
spin_unlock(&temp_queue->queue_lock);
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (duplicate) {
|
|
reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
|
|
reg |= FSL_QDMA_BSQMR_DI;
|
|
qdma_desc_addr_set64(status_addr, 0x0);
|
|
fsl_status->virt_head++;
|
|
if (fsl_status->virt_head == fsl_status->cq
|
|
+ fsl_status->n_cq)
|
|
fsl_status->virt_head = fsl_status->cq;
|
|
qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
|
|
spin_unlock(&temp_queue->queue_lock);
|
|
continue;
|
|
}
|
|
list_del(&fsl_comp->list);
|
|
|
|
reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
|
|
reg |= FSL_QDMA_BSQMR_DI;
|
|
qdma_desc_addr_set64(status_addr, 0x0);
|
|
fsl_status->virt_head++;
|
|
if (fsl_status->virt_head == fsl_status->cq + fsl_status->n_cq)
|
|
fsl_status->virt_head = fsl_status->cq;
|
|
qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
|
|
spin_unlock(&temp_queue->queue_lock);
|
|
|
|
spin_lock(&fsl_comp->qchan->vchan.lock);
|
|
vchan_cookie_complete(&fsl_comp->vdesc);
|
|
fsl_comp->qchan->status = DMA_COMPLETE;
|
|
spin_unlock(&fsl_comp->qchan->vchan.lock);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t fsl_qdma_error_handler(int irq, void *dev_id)
|
|
{
|
|
unsigned int intr;
|
|
struct fsl_qdma_engine *fsl_qdma = dev_id;
|
|
void __iomem *status = fsl_qdma->status_base;
|
|
|
|
intr = qdma_readl(fsl_qdma, status + FSL_QDMA_DEDR);
|
|
|
|
if (intr)
|
|
dev_err(fsl_qdma->dma_dev.dev, "DMA transaction error!\n");
|
|
|
|
qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t fsl_qdma_queue_handler(int irq, void *dev_id)
|
|
{
|
|
int id;
|
|
unsigned int intr, reg;
|
|
struct fsl_qdma_engine *fsl_qdma = dev_id;
|
|
void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
|
|
|
|
id = irq - fsl_qdma->irq_base;
|
|
if (id < 0 && id > fsl_qdma->block_number) {
|
|
dev_err(fsl_qdma->dma_dev.dev,
|
|
"irq %d is wrong irq_base is %d\n",
|
|
irq, fsl_qdma->irq_base);
|
|
}
|
|
|
|
block = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, id);
|
|
|
|
intr = qdma_readl(fsl_qdma, block + FSL_QDMA_BCQIDR(0));
|
|
|
|
if ((intr & FSL_QDMA_CQIDR_SQT) != 0)
|
|
intr = fsl_qdma_queue_transfer_complete(fsl_qdma, block, id);
|
|
|
|
if (intr != 0) {
|
|
reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
|
|
reg |= FSL_QDMA_DMR_DQD;
|
|
qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
|
|
qdma_writel(fsl_qdma, 0, block + FSL_QDMA_BCQIER(0));
|
|
dev_err(fsl_qdma->dma_dev.dev, "QDMA: status err!\n");
|
|
}
|
|
|
|
/* Clear all detected events and interrupts. */
|
|
qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
|
|
block + FSL_QDMA_BCQIDR(0));
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int
|
|
fsl_qdma_irq_init(struct platform_device *pdev,
|
|
struct fsl_qdma_engine *fsl_qdma)
|
|
{
|
|
int i;
|
|
int cpu;
|
|
int ret;
|
|
char irq_name[20];
|
|
|
|
fsl_qdma->error_irq =
|
|
platform_get_irq_byname(pdev, "qdma-error");
|
|
if (fsl_qdma->error_irq < 0)
|
|
return fsl_qdma->error_irq;
|
|
|
|
ret = devm_request_irq(&pdev->dev, fsl_qdma->error_irq,
|
|
fsl_qdma_error_handler, 0,
|
|
"qDMA error", fsl_qdma);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't register qDMA controller IRQ.\n");
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < fsl_qdma->block_number; i++) {
|
|
sprintf(irq_name, "qdma-queue%d", i);
|
|
fsl_qdma->queue_irq[i] =
|
|
platform_get_irq_byname(pdev, irq_name);
|
|
|
|
if (fsl_qdma->queue_irq[i] < 0)
|
|
return fsl_qdma->queue_irq[i];
|
|
|
|
ret = devm_request_irq(&pdev->dev,
|
|
fsl_qdma->queue_irq[i],
|
|
fsl_qdma_queue_handler,
|
|
0,
|
|
"qDMA queue",
|
|
fsl_qdma);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"Can't register qDMA queue IRQ.\n");
|
|
return ret;
|
|
}
|
|
|
|
cpu = i % num_online_cpus();
|
|
ret = irq_set_affinity_hint(fsl_qdma->queue_irq[i],
|
|
get_cpu_mask(cpu));
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"Can't set cpu %d affinity to IRQ %d.\n",
|
|
cpu,
|
|
fsl_qdma->queue_irq[i]);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fsl_qdma_irq_exit(struct platform_device *pdev,
|
|
struct fsl_qdma_engine *fsl_qdma)
|
|
{
|
|
int i;
|
|
|
|
devm_free_irq(&pdev->dev, fsl_qdma->error_irq, fsl_qdma);
|
|
for (i = 0; i < fsl_qdma->block_number; i++)
|
|
devm_free_irq(&pdev->dev, fsl_qdma->queue_irq[i], fsl_qdma);
|
|
}
|
|
|
|
static int fsl_qdma_reg_init(struct fsl_qdma_engine *fsl_qdma)
|
|
{
|
|
u32 reg;
|
|
int i, j, ret;
|
|
struct fsl_qdma_queue *temp;
|
|
void __iomem *status = fsl_qdma->status_base;
|
|
void __iomem *block, *ctrl = fsl_qdma->ctrl_base;
|
|
struct fsl_qdma_queue *fsl_queue = fsl_qdma->queue;
|
|
|
|
/* Try to halt the qDMA engine first. */
|
|
ret = fsl_qdma_halt(fsl_qdma);
|
|
if (ret) {
|
|
dev_err(fsl_qdma->dma_dev.dev, "DMA halt failed!");
|
|
return ret;
|
|
}
|
|
|
|
for (i = 0; i < fsl_qdma->block_number; i++) {
|
|
/*
|
|
* Clear the command queue interrupt detect register for
|
|
* all queues.
|
|
*/
|
|
|
|
block = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, i);
|
|
qdma_writel(fsl_qdma, FSL_QDMA_BCQIDR_CLEAR,
|
|
block + FSL_QDMA_BCQIDR(0));
|
|
}
|
|
|
|
for (j = 0; j < fsl_qdma->block_number; j++) {
|
|
block = fsl_qdma->block_base +
|
|
FSL_QDMA_BLOCK_BASE_OFFSET(fsl_qdma, j);
|
|
for (i = 0; i < fsl_qdma->n_queues; i++) {
|
|
temp = fsl_queue + i + (j * fsl_qdma->n_queues);
|
|
/*
|
|
* Initialize Command Queue registers to
|
|
* point to the first
|
|
* command descriptor in memory.
|
|
* Dequeue Pointer Address Registers
|
|
* Enqueue Pointer Address Registers
|
|
*/
|
|
|
|
qdma_writel(fsl_qdma, temp->bus_addr,
|
|
block + FSL_QDMA_BCQDPA_SADDR(i));
|
|
qdma_writel(fsl_qdma, temp->bus_addr,
|
|
block + FSL_QDMA_BCQEPA_SADDR(i));
|
|
|
|
/* Initialize the queue mode. */
|
|
reg = FSL_QDMA_BCQMR_EN;
|
|
reg |= FSL_QDMA_BCQMR_CD_THLD(ilog2(temp->n_cq) - 4);
|
|
reg |= FSL_QDMA_BCQMR_CQ_SIZE(ilog2(temp->n_cq) - 6);
|
|
qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BCQMR(i));
|
|
}
|
|
|
|
/*
|
|
* Workaround for erratum: ERR010812.
|
|
* We must enable XOFF to avoid the enqueue rejection occurs.
|
|
* Setting SQCCMR ENTER_WM to 0x20.
|
|
*/
|
|
|
|
qdma_writel(fsl_qdma, FSL_QDMA_SQCCMR_ENTER_WM,
|
|
block + FSL_QDMA_SQCCMR);
|
|
|
|
/*
|
|
* Initialize status queue registers to point to the first
|
|
* command descriptor in memory.
|
|
* Dequeue Pointer Address Registers
|
|
* Enqueue Pointer Address Registers
|
|
*/
|
|
|
|
qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
|
|
block + FSL_QDMA_SQEPAR);
|
|
qdma_writel(fsl_qdma, fsl_qdma->status[j]->bus_addr,
|
|
block + FSL_QDMA_SQDPAR);
|
|
/* Initialize status queue interrupt. */
|
|
qdma_writel(fsl_qdma, FSL_QDMA_BCQIER_CQTIE,
|
|
block + FSL_QDMA_BCQIER(0));
|
|
qdma_writel(fsl_qdma, FSL_QDMA_BSQICR_ICEN |
|
|
FSL_QDMA_BSQICR_ICST(5) | 0x8000,
|
|
block + FSL_QDMA_BSQICR);
|
|
qdma_writel(fsl_qdma, FSL_QDMA_CQIER_MEIE |
|
|
FSL_QDMA_CQIER_TEIE,
|
|
block + FSL_QDMA_CQIER);
|
|
|
|
/* Initialize the status queue mode. */
|
|
reg = FSL_QDMA_BSQMR_EN;
|
|
reg |= FSL_QDMA_BSQMR_CQ_SIZE(ilog2
|
|
(fsl_qdma->status[j]->n_cq) - 6);
|
|
|
|
qdma_writel(fsl_qdma, reg, block + FSL_QDMA_BSQMR);
|
|
reg = qdma_readl(fsl_qdma, block + FSL_QDMA_BSQMR);
|
|
}
|
|
|
|
/* Initialize controller interrupt register. */
|
|
qdma_writel(fsl_qdma, FSL_QDMA_DEDR_CLEAR, status + FSL_QDMA_DEDR);
|
|
qdma_writel(fsl_qdma, FSL_QDMA_DEIER_CLEAR, status + FSL_QDMA_DEIER);
|
|
|
|
reg = qdma_readl(fsl_qdma, ctrl + FSL_QDMA_DMR);
|
|
reg &= ~FSL_QDMA_DMR_DQD;
|
|
qdma_writel(fsl_qdma, reg, ctrl + FSL_QDMA_DMR);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct dma_async_tx_descriptor *
|
|
fsl_qdma_prep_memcpy(struct dma_chan *chan, dma_addr_t dst,
|
|
dma_addr_t src, size_t len, unsigned long flags)
|
|
{
|
|
struct fsl_qdma_comp *fsl_comp;
|
|
struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
|
|
|
|
fsl_comp = fsl_qdma_request_enqueue_desc(fsl_chan);
|
|
|
|
if (!fsl_comp)
|
|
return NULL;
|
|
|
|
fsl_qdma_comp_fill_memcpy(fsl_comp, dst, src, len);
|
|
|
|
return vchan_tx_prep(&fsl_chan->vchan, &fsl_comp->vdesc, flags);
|
|
}
|
|
|
|
static void fsl_qdma_enqueue_desc(struct fsl_qdma_chan *fsl_chan)
|
|
{
|
|
u32 reg;
|
|
struct virt_dma_desc *vdesc;
|
|
struct fsl_qdma_comp *fsl_comp;
|
|
struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
|
|
void __iomem *block = fsl_queue->block_base;
|
|
|
|
reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQSR(fsl_queue->id));
|
|
if (reg & (FSL_QDMA_BCQSR_QF | FSL_QDMA_BCQSR_XOFF))
|
|
return;
|
|
vdesc = vchan_next_desc(&fsl_chan->vchan);
|
|
if (!vdesc)
|
|
return;
|
|
list_del(&vdesc->node);
|
|
fsl_comp = to_fsl_qdma_comp(vdesc);
|
|
|
|
memcpy(fsl_queue->virt_head++,
|
|
fsl_comp->virt_addr, sizeof(struct fsl_qdma_format));
|
|
if (fsl_queue->virt_head == fsl_queue->cq + fsl_queue->n_cq)
|
|
fsl_queue->virt_head = fsl_queue->cq;
|
|
|
|
list_add_tail(&fsl_comp->list, &fsl_queue->comp_used);
|
|
barrier();
|
|
reg = qdma_readl(fsl_chan->qdma, block + FSL_QDMA_BCQMR(fsl_queue->id));
|
|
reg |= FSL_QDMA_BCQMR_EI;
|
|
qdma_writel(fsl_chan->qdma, reg, block + FSL_QDMA_BCQMR(fsl_queue->id));
|
|
fsl_chan->status = DMA_IN_PROGRESS;
|
|
}
|
|
|
|
static void fsl_qdma_free_desc(struct virt_dma_desc *vdesc)
|
|
{
|
|
unsigned long flags;
|
|
struct fsl_qdma_comp *fsl_comp;
|
|
struct fsl_qdma_queue *fsl_queue;
|
|
|
|
fsl_comp = to_fsl_qdma_comp(vdesc);
|
|
fsl_queue = fsl_comp->qchan->queue;
|
|
|
|
spin_lock_irqsave(&fsl_queue->queue_lock, flags);
|
|
list_add_tail(&fsl_comp->list, &fsl_queue->comp_free);
|
|
spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
|
|
}
|
|
|
|
static void fsl_qdma_issue_pending(struct dma_chan *chan)
|
|
{
|
|
unsigned long flags;
|
|
struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
|
|
struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
|
|
|
|
spin_lock_irqsave(&fsl_queue->queue_lock, flags);
|
|
spin_lock(&fsl_chan->vchan.lock);
|
|
if (vchan_issue_pending(&fsl_chan->vchan))
|
|
fsl_qdma_enqueue_desc(fsl_chan);
|
|
spin_unlock(&fsl_chan->vchan.lock);
|
|
spin_unlock_irqrestore(&fsl_queue->queue_lock, flags);
|
|
}
|
|
|
|
static void fsl_qdma_synchronize(struct dma_chan *chan)
|
|
{
|
|
struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
|
|
|
|
vchan_synchronize(&fsl_chan->vchan);
|
|
}
|
|
|
|
static int fsl_qdma_terminate_all(struct dma_chan *chan)
|
|
{
|
|
LIST_HEAD(head);
|
|
unsigned long flags;
|
|
struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
|
|
|
|
spin_lock_irqsave(&fsl_chan->vchan.lock, flags);
|
|
vchan_get_all_descriptors(&fsl_chan->vchan, &head);
|
|
spin_unlock_irqrestore(&fsl_chan->vchan.lock, flags);
|
|
vchan_dma_desc_free_list(&fsl_chan->vchan, &head);
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_qdma_alloc_chan_resources(struct dma_chan *chan)
|
|
{
|
|
int ret;
|
|
struct fsl_qdma_chan *fsl_chan = to_fsl_qdma_chan(chan);
|
|
struct fsl_qdma_engine *fsl_qdma = fsl_chan->qdma;
|
|
struct fsl_qdma_queue *fsl_queue = fsl_chan->queue;
|
|
|
|
if (fsl_queue->comp_pool && fsl_queue->desc_pool)
|
|
return fsl_qdma->desc_allocated;
|
|
|
|
INIT_LIST_HEAD(&fsl_queue->comp_free);
|
|
|
|
/*
|
|
* The dma pool for queue command buffer
|
|
*/
|
|
fsl_queue->comp_pool =
|
|
dma_pool_create("comp_pool",
|
|
chan->device->dev,
|
|
FSL_QDMA_COMMAND_BUFFER_SIZE,
|
|
64, 0);
|
|
if (!fsl_queue->comp_pool)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* The dma pool for Descriptor(SD/DD) buffer
|
|
*/
|
|
fsl_queue->desc_pool =
|
|
dma_pool_create("desc_pool",
|
|
chan->device->dev,
|
|
FSL_QDMA_DESCRIPTOR_BUFFER_SIZE,
|
|
32, 0);
|
|
if (!fsl_queue->desc_pool)
|
|
goto err_desc_pool;
|
|
|
|
ret = fsl_qdma_pre_request_enqueue_desc(fsl_queue);
|
|
if (ret) {
|
|
dev_err(chan->device->dev,
|
|
"failed to alloc dma buffer for S/G descriptor\n");
|
|
goto err_mem;
|
|
}
|
|
|
|
fsl_qdma->desc_allocated++;
|
|
return fsl_qdma->desc_allocated;
|
|
|
|
err_mem:
|
|
dma_pool_destroy(fsl_queue->desc_pool);
|
|
err_desc_pool:
|
|
dma_pool_destroy(fsl_queue->comp_pool);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int fsl_qdma_probe(struct platform_device *pdev)
|
|
{
|
|
int ret, i;
|
|
int blk_num, blk_off;
|
|
u32 len, chans, queues;
|
|
struct resource *res;
|
|
struct fsl_qdma_chan *fsl_chan;
|
|
struct fsl_qdma_engine *fsl_qdma;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
ret = of_property_read_u32(np, "dma-channels", &chans);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get dma-channels.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = of_property_read_u32(np, "block-offset", &blk_off);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get block-offset.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = of_property_read_u32(np, "block-number", &blk_num);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get block-number.\n");
|
|
return ret;
|
|
}
|
|
|
|
blk_num = min_t(int, blk_num, num_online_cpus());
|
|
|
|
len = sizeof(*fsl_qdma);
|
|
fsl_qdma = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
|
|
if (!fsl_qdma)
|
|
return -ENOMEM;
|
|
|
|
len = sizeof(*fsl_chan) * chans;
|
|
fsl_qdma->chans = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
|
|
if (!fsl_qdma->chans)
|
|
return -ENOMEM;
|
|
|
|
len = sizeof(struct fsl_qdma_queue *) * blk_num;
|
|
fsl_qdma->status = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
|
|
if (!fsl_qdma->status)
|
|
return -ENOMEM;
|
|
|
|
len = sizeof(int) * blk_num;
|
|
fsl_qdma->queue_irq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
|
|
if (!fsl_qdma->queue_irq)
|
|
return -ENOMEM;
|
|
|
|
ret = of_property_read_u32(np, "fsl,dma-queues", &queues);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't get queues.\n");
|
|
return ret;
|
|
}
|
|
|
|
fsl_qdma->desc_allocated = 0;
|
|
fsl_qdma->n_chans = chans;
|
|
fsl_qdma->n_queues = queues;
|
|
fsl_qdma->block_number = blk_num;
|
|
fsl_qdma->block_offset = blk_off;
|
|
|
|
mutex_init(&fsl_qdma->fsl_qdma_mutex);
|
|
|
|
for (i = 0; i < fsl_qdma->block_number; i++) {
|
|
fsl_qdma->status[i] = fsl_qdma_prep_status_queue(pdev);
|
|
if (!fsl_qdma->status[i])
|
|
return -ENOMEM;
|
|
}
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
fsl_qdma->ctrl_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(fsl_qdma->ctrl_base))
|
|
return PTR_ERR(fsl_qdma->ctrl_base);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
fsl_qdma->status_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(fsl_qdma->status_base))
|
|
return PTR_ERR(fsl_qdma->status_base);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
|
|
fsl_qdma->block_base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(fsl_qdma->block_base))
|
|
return PTR_ERR(fsl_qdma->block_base);
|
|
fsl_qdma->queue = fsl_qdma_alloc_queue_resources(pdev, fsl_qdma);
|
|
if (!fsl_qdma->queue)
|
|
return -ENOMEM;
|
|
|
|
ret = fsl_qdma_irq_init(pdev, fsl_qdma);
|
|
if (ret)
|
|
return ret;
|
|
|
|
fsl_qdma->irq_base = platform_get_irq_byname(pdev, "qdma-queue0");
|
|
if (fsl_qdma->irq_base < 0)
|
|
return fsl_qdma->irq_base;
|
|
|
|
fsl_qdma->feature = of_property_read_bool(np, "big-endian");
|
|
INIT_LIST_HEAD(&fsl_qdma->dma_dev.channels);
|
|
|
|
for (i = 0; i < fsl_qdma->n_chans; i++) {
|
|
struct fsl_qdma_chan *fsl_chan = &fsl_qdma->chans[i];
|
|
|
|
fsl_chan->qdma = fsl_qdma;
|
|
fsl_chan->queue = fsl_qdma->queue + i % (fsl_qdma->n_queues *
|
|
fsl_qdma->block_number);
|
|
fsl_chan->vchan.desc_free = fsl_qdma_free_desc;
|
|
vchan_init(&fsl_chan->vchan, &fsl_qdma->dma_dev);
|
|
}
|
|
|
|
dma_cap_set(DMA_MEMCPY, fsl_qdma->dma_dev.cap_mask);
|
|
|
|
fsl_qdma->dma_dev.dev = &pdev->dev;
|
|
fsl_qdma->dma_dev.device_free_chan_resources =
|
|
fsl_qdma_free_chan_resources;
|
|
fsl_qdma->dma_dev.device_alloc_chan_resources =
|
|
fsl_qdma_alloc_chan_resources;
|
|
fsl_qdma->dma_dev.device_tx_status = dma_cookie_status;
|
|
fsl_qdma->dma_dev.device_prep_dma_memcpy = fsl_qdma_prep_memcpy;
|
|
fsl_qdma->dma_dev.device_issue_pending = fsl_qdma_issue_pending;
|
|
fsl_qdma->dma_dev.device_synchronize = fsl_qdma_synchronize;
|
|
fsl_qdma->dma_dev.device_terminate_all = fsl_qdma_terminate_all;
|
|
|
|
dma_set_mask(&pdev->dev, DMA_BIT_MASK(40));
|
|
|
|
platform_set_drvdata(pdev, fsl_qdma);
|
|
|
|
ret = dma_async_device_register(&fsl_qdma->dma_dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev,
|
|
"Can't register NXP Layerscape qDMA engine.\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = fsl_qdma_reg_init(fsl_qdma);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Can't Initialize the qDMA engine.\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
|
|
{
|
|
struct fsl_qdma_chan *chan, *_chan;
|
|
|
|
list_for_each_entry_safe(chan, _chan,
|
|
&dmadev->channels, vchan.chan.device_node) {
|
|
list_del(&chan->vchan.chan.device_node);
|
|
tasklet_kill(&chan->vchan.task);
|
|
}
|
|
}
|
|
|
|
static int fsl_qdma_remove(struct platform_device *pdev)
|
|
{
|
|
int i;
|
|
struct fsl_qdma_queue *status;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct fsl_qdma_engine *fsl_qdma = platform_get_drvdata(pdev);
|
|
|
|
fsl_qdma_irq_exit(pdev, fsl_qdma);
|
|
fsl_qdma_cleanup_vchan(&fsl_qdma->dma_dev);
|
|
of_dma_controller_free(np);
|
|
dma_async_device_unregister(&fsl_qdma->dma_dev);
|
|
|
|
for (i = 0; i < fsl_qdma->block_number; i++) {
|
|
status = fsl_qdma->status[i];
|
|
dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) *
|
|
status->n_cq, status->cq, status->bus_addr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id fsl_qdma_dt_ids[] = {
|
|
{ .compatible = "fsl,ls1021a-qdma", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, fsl_qdma_dt_ids);
|
|
|
|
static struct platform_driver fsl_qdma_driver = {
|
|
.driver = {
|
|
.name = "fsl-qdma",
|
|
.of_match_table = fsl_qdma_dt_ids,
|
|
},
|
|
.probe = fsl_qdma_probe,
|
|
.remove = fsl_qdma_remove,
|
|
};
|
|
|
|
module_platform_driver(fsl_qdma_driver);
|
|
|
|
MODULE_ALIAS("platform:fsl-qdma");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("NXP Layerscape qDMA engine driver");
|