diff options
Diffstat (limited to 'drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h')
| -rw-r--r-- | drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h b/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h deleted file mode 100644 index 8b9c978257b9..000000000000 --- a/drivers/staging/kpc2000/kpc_dma/kpc_dma_driver.h +++ /dev/null @@ -1,222 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0+ */ -#ifndef KPC_DMA_DRIVER_H -#define KPC_DMA_DRIVER_H -#include <linux/platform_device.h> -#include <linux/cdev.h> -#include <linux/kfifo.h> -#include <linux/list.h> -#include <linux/spinlock.h> -#include <linux/sched.h> -#include <linux/miscdevice.h> -#include <linux/rwsem.h> -#include <linux/dma-mapping.h> -#include <linux/dmapool.h> -#include <linux/pci.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/bitops.h> -#include "../kpc.h" - -struct kp2000_device; -struct kpc_dma_device { - struct list_head list; - struct platform_device *pldev; - u32 __iomem *eng_regs; - struct device *kpc_dma_dev; - struct kobject kobj; - char name[16]; - - int dir; // DMA_FROM_DEVICE || DMA_TO_DEVICE - struct mutex sem; - unsigned int irq; - struct work_struct irq_work; - - atomic_t open_count; - - size_t accumulated_bytes; - u32 accumulated_flags; - - // Descriptor "Pool" housekeeping - u32 desc_pool_cnt; - struct dma_pool *desc_pool; - struct kpc_dma_descriptor *desc_pool_first; - struct kpc_dma_descriptor *desc_pool_last; - - struct kpc_dma_descriptor *desc_next; - struct kpc_dma_descriptor *desc_completed; -}; - -struct dev_private_data { - struct kpc_dma_device *ldev; - u64 card_addr; - u64 user_ctl; - u64 user_ctl_last; - u64 user_sts; -}; - -struct kpc_dma_device *kpc_dma_lookup_device(int minor); - -extern const struct file_operations kpc_dma_fops; - -#define ENG_CAP_PRESENT 0x00000001 -#define ENG_CAP_DIRECTION 0x00000002 -#define ENG_CAP_TYPE_MASK 0x000000F0 -#define ENG_CAP_NUMBER_MASK 0x0000FF00 -#define ENG_CAP_CARD_ADDR_SIZE_MASK 0x007F0000 -#define ENG_CAP_DESC_MAX_BYTE_CNT_MASK 0x3F000000 -#define ENG_CAP_PERF_SCALE_MASK 0xC0000000 - -#define ENG_CTL_IRQ_ENABLE BIT(0) -#define ENG_CTL_IRQ_ACTIVE BIT(1) -#define ENG_CTL_DESC_COMPLETE BIT(2) -#define ENG_CTL_DESC_ALIGN_ERR BIT(3) -#define ENG_CTL_DESC_FETCH_ERR BIT(4) -#define ENG_CTL_SW_ABORT_ERR BIT(5) -#define ENG_CTL_DESC_CHAIN_END BIT(7) -#define ENG_CTL_DMA_ENABLE BIT(8) -#define ENG_CTL_DMA_RUNNING BIT(10) -#define ENG_CTL_DMA_WAITING BIT(11) -#define ENG_CTL_DMA_WAITING_PERSIST BIT(12) -#define ENG_CTL_DMA_RESET_REQUEST BIT(14) -#define ENG_CTL_DMA_RESET BIT(15) -#define ENG_CTL_DESC_FETCH_ERR_CLASS_MASK 0x700000 - -struct aio_cb_data { - struct dev_private_data *priv; - struct kpc_dma_device *ldev; - struct completion *cpl; - unsigned char flags; - size_t len; - - unsigned int page_count; - struct page **user_pages; - struct sg_table sgt; - int mapped_entry_count; -}; - -#define ACD_FLAG_DONE 0 -#define ACD_FLAG_ABORT 1 -#define ACD_FLAG_ENG_ACCUM_ERROR 4 -#define ACD_FLAG_ENG_ACCUM_SHORT 5 - -struct kpc_dma_descriptor { - struct { - volatile u32 DescByteCount :20; - volatile u32 DescStatusErrorFlags :4; - volatile u32 DescStatusFlags :8; - }; - volatile u32 DescUserControlLS; - volatile u32 DescUserControlMS; - volatile u32 DescCardAddrLS; - struct { - volatile u32 DescBufferByteCount :20; - volatile u32 DescCardAddrMS :4; - volatile u32 DescControlFlags :8; - }; - volatile u32 DescSystemAddrLS; - volatile u32 DescSystemAddrMS; - volatile u32 DescNextDescPtr; - - dma_addr_t MyDMAAddr; - struct kpc_dma_descriptor *Next; - - struct aio_cb_data *acd; -} __attribute__((packed)); -// DescControlFlags: -#define DMA_DESC_CTL_SOP BIT(7) -#define DMA_DESC_CTL_EOP BIT(6) -#define DMA_DESC_CTL_AFIFO BIT(2) -#define DMA_DESC_CTL_IRQONERR BIT(1) -#define DMA_DESC_CTL_IRQONDONE BIT(0) -// DescStatusFlags: -#define DMA_DESC_STS_SOP BIT(7) -#define DMA_DESC_STS_EOP BIT(6) -#define DMA_DESC_STS_ERROR BIT(4) -#define DMA_DESC_STS_USMSZ BIT(3) -#define DMA_DESC_STS_USLSZ BIT(2) -#define DMA_DESC_STS_SHORT BIT(1) -#define DMA_DESC_STS_COMPLETE BIT(0) -// DescStatusErrorFlags: -#define DMA_DESC_ESTS_ECRC BIT(2) -#define DMA_DESC_ESTS_POISON BIT(1) -#define DMA_DESC_ESTS_UNSUCCESSFUL BIT(0) - -#define DMA_DESC_ALIGNMENT 0x20 - -static inline -u32 GetEngineCapabilities(struct kpc_dma_device *eng) -{ - return readl(eng->eng_regs + 0); -} - -static inline -void WriteEngineControl(struct kpc_dma_device *eng, u32 value) -{ - writel(value, eng->eng_regs + 1); -} - -static inline -u32 GetEngineControl(struct kpc_dma_device *eng) -{ - return readl(eng->eng_regs + 1); -} - -static inline -void SetClearEngineControl(struct kpc_dma_device *eng, u32 set_bits, u32 clear_bits) -{ - u32 val = GetEngineControl(eng); - - val |= set_bits; - val &= ~clear_bits; - WriteEngineControl(eng, val); -} - -static inline -void SetEngineNextPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc) -{ - writel(desc->MyDMAAddr, eng->eng_regs + 2); -} - -static inline -void SetEngineSWPtr(struct kpc_dma_device *eng, struct kpc_dma_descriptor *desc) -{ - writel(desc->MyDMAAddr, eng->eng_regs + 3); -} - -static inline -void ClearEngineCompletePtr(struct kpc_dma_device *eng) -{ - writel(0, eng->eng_regs + 4); -} - -static inline -u32 GetEngineCompletePtr(struct kpc_dma_device *eng) -{ - return readl(eng->eng_regs + 4); -} - -static inline -void lock_engine(struct kpc_dma_device *eng) -{ - BUG_ON(!eng); - mutex_lock(&eng->sem); -} - -static inline -void unlock_engine(struct kpc_dma_device *eng) -{ - BUG_ON(!eng); - mutex_unlock(&eng->sem); -} - -/// Shared Functions -void start_dma_engine(struct kpc_dma_device *eng); -int setup_dma_engine(struct kpc_dma_device *eng, u32 desc_cnt); -void stop_dma_engine(struct kpc_dma_device *eng); -void destroy_dma_engine(struct kpc_dma_device *eng); -void clear_desc(struct kpc_dma_descriptor *desc); -int count_descriptors_available(struct kpc_dma_device *eng); -void transfer_complete_cb(struct aio_cb_data *acd, size_t xfr_count, u32 flags); - -#endif /* KPC_DMA_DRIVER_H */ - |