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232 lines
6.7 KiB
232 lines
6.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef B43legacy_DMA_H_ |
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#define B43legacy_DMA_H_ |
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#include <linux/list.h> |
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#include <linux/spinlock.h> |
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#include <linux/workqueue.h> |
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#include <linux/linkage.h> |
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#include <linux/atomic.h> |
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#include "b43legacy.h" |
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/* DMA-Interrupt reasons. */ |
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#define B43legacy_DMAIRQ_FATALMASK ((1 << 10) | (1 << 11) | (1 << 12) \ |
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| (1 << 14) | (1 << 15)) |
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#define B43legacy_DMAIRQ_NONFATALMASK (1 << 13) |
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#define B43legacy_DMAIRQ_RX_DONE (1 << 16) |
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/*** 32-bit DMA Engine. ***/ |
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/* 32-bit DMA controller registers. */ |
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#define B43legacy_DMA32_TXCTL 0x00 |
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#define B43legacy_DMA32_TXENABLE 0x00000001 |
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#define B43legacy_DMA32_TXSUSPEND 0x00000002 |
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#define B43legacy_DMA32_TXLOOPBACK 0x00000004 |
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#define B43legacy_DMA32_TXFLUSH 0x00000010 |
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#define B43legacy_DMA32_TXADDREXT_MASK 0x00030000 |
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#define B43legacy_DMA32_TXADDREXT_SHIFT 16 |
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#define B43legacy_DMA32_TXRING 0x04 |
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#define B43legacy_DMA32_TXINDEX 0x08 |
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#define B43legacy_DMA32_TXSTATUS 0x0C |
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#define B43legacy_DMA32_TXDPTR 0x00000FFF |
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#define B43legacy_DMA32_TXSTATE 0x0000F000 |
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#define B43legacy_DMA32_TXSTAT_DISABLED 0x00000000 |
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#define B43legacy_DMA32_TXSTAT_ACTIVE 0x00001000 |
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#define B43legacy_DMA32_TXSTAT_IDLEWAIT 0x00002000 |
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#define B43legacy_DMA32_TXSTAT_STOPPED 0x00003000 |
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#define B43legacy_DMA32_TXSTAT_SUSP 0x00004000 |
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#define B43legacy_DMA32_TXERROR 0x000F0000 |
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#define B43legacy_DMA32_TXERR_NOERR 0x00000000 |
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#define B43legacy_DMA32_TXERR_PROT 0x00010000 |
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#define B43legacy_DMA32_TXERR_UNDERRUN 0x00020000 |
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#define B43legacy_DMA32_TXERR_BUFREAD 0x00030000 |
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#define B43legacy_DMA32_TXERR_DESCREAD 0x00040000 |
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#define B43legacy_DMA32_TXACTIVE 0xFFF00000 |
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#define B43legacy_DMA32_RXCTL 0x10 |
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#define B43legacy_DMA32_RXENABLE 0x00000001 |
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#define B43legacy_DMA32_RXFROFF_MASK 0x000000FE |
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#define B43legacy_DMA32_RXFROFF_SHIFT 1 |
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#define B43legacy_DMA32_RXDIRECTFIFO 0x00000100 |
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#define B43legacy_DMA32_RXADDREXT_MASK 0x00030000 |
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#define B43legacy_DMA32_RXADDREXT_SHIFT 16 |
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#define B43legacy_DMA32_RXRING 0x14 |
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#define B43legacy_DMA32_RXINDEX 0x18 |
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#define B43legacy_DMA32_RXSTATUS 0x1C |
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#define B43legacy_DMA32_RXDPTR 0x00000FFF |
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#define B43legacy_DMA32_RXSTATE 0x0000F000 |
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#define B43legacy_DMA32_RXSTAT_DISABLED 0x00000000 |
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#define B43legacy_DMA32_RXSTAT_ACTIVE 0x00001000 |
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#define B43legacy_DMA32_RXSTAT_IDLEWAIT 0x00002000 |
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#define B43legacy_DMA32_RXSTAT_STOPPED 0x00003000 |
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#define B43legacy_DMA32_RXERROR 0x000F0000 |
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#define B43legacy_DMA32_RXERR_NOERR 0x00000000 |
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#define B43legacy_DMA32_RXERR_PROT 0x00010000 |
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#define B43legacy_DMA32_RXERR_OVERFLOW 0x00020000 |
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#define B43legacy_DMA32_RXERR_BUFWRITE 0x00030000 |
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#define B43legacy_DMA32_RXERR_DESCREAD 0x00040000 |
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#define B43legacy_DMA32_RXACTIVE 0xFFF00000 |
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/* 32-bit DMA descriptor. */ |
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struct b43legacy_dmadesc32 { |
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__le32 control; |
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__le32 address; |
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} __packed; |
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#define B43legacy_DMA32_DCTL_BYTECNT 0x00001FFF |
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#define B43legacy_DMA32_DCTL_ADDREXT_MASK 0x00030000 |
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#define B43legacy_DMA32_DCTL_ADDREXT_SHIFT 16 |
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#define B43legacy_DMA32_DCTL_DTABLEEND 0x10000000 |
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#define B43legacy_DMA32_DCTL_IRQ 0x20000000 |
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#define B43legacy_DMA32_DCTL_FRAMEEND 0x40000000 |
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#define B43legacy_DMA32_DCTL_FRAMESTART 0x80000000 |
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/* Misc DMA constants */ |
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#define B43legacy_DMA_RINGMEMSIZE PAGE_SIZE |
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#define B43legacy_DMA0_RX_FRAMEOFFSET 30 |
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#define B43legacy_DMA3_RX_FRAMEOFFSET 0 |
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/* DMA engine tuning knobs */ |
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#define B43legacy_TXRING_SLOTS 128 |
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#define B43legacy_RXRING_SLOTS 64 |
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#define B43legacy_DMA0_RX_BUFFERSIZE (2304 + 100) |
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#define B43legacy_DMA3_RX_BUFFERSIZE 16 |
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#ifdef CONFIG_B43LEGACY_DMA |
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struct sk_buff; |
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struct b43legacy_private; |
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struct b43legacy_txstatus; |
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struct b43legacy_dmadesc_meta { |
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/* The kernel DMA-able buffer. */ |
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struct sk_buff *skb; |
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/* DMA base bus-address of the descriptor buffer. */ |
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dma_addr_t dmaaddr; |
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/* ieee80211 TX status. Only used once per 802.11 frag. */ |
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bool is_last_fragment; |
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}; |
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enum b43legacy_dmatype { |
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B43legacy_DMA_30BIT = 30, |
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B43legacy_DMA_32BIT = 32, |
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}; |
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struct b43legacy_dmaring { |
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/* Kernel virtual base address of the ring memory. */ |
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void *descbase; |
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/* Meta data about all descriptors. */ |
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struct b43legacy_dmadesc_meta *meta; |
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/* Cache of TX headers for each slot. |
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* This is to avoid an allocation on each TX. |
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* This is NULL for an RX ring. |
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*/ |
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u8 *txhdr_cache; |
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/* (Unadjusted) DMA base bus-address of the ring memory. */ |
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dma_addr_t dmabase; |
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/* Number of descriptor slots in the ring. */ |
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int nr_slots; |
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/* Number of used descriptor slots. */ |
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int used_slots; |
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/* Currently used slot in the ring. */ |
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int current_slot; |
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/* Frameoffset in octets. */ |
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u32 frameoffset; |
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/* Descriptor buffer size. */ |
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u16 rx_buffersize; |
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/* The MMIO base register of the DMA controller. */ |
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u16 mmio_base; |
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/* DMA controller index number (0-5). */ |
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int index; |
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/* Boolean. Is this a TX ring? */ |
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bool tx; |
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/* The type of DMA engine used. */ |
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enum b43legacy_dmatype type; |
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/* Boolean. Is this ring stopped at ieee80211 level? */ |
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bool stopped; |
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/* The QOS priority assigned to this ring. Only used for TX rings. |
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* This is the mac80211 "queue" value. */ |
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u8 queue_prio; |
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struct b43legacy_wldev *dev; |
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#ifdef CONFIG_B43LEGACY_DEBUG |
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/* Maximum number of used slots. */ |
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int max_used_slots; |
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/* Last time we injected a ring overflow. */ |
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unsigned long last_injected_overflow; |
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#endif /* CONFIG_B43LEGACY_DEBUG*/ |
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}; |
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static inline |
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u32 b43legacy_dma_read(struct b43legacy_dmaring *ring, |
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u16 offset) |
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{ |
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return b43legacy_read32(ring->dev, ring->mmio_base + offset); |
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} |
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static inline |
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void b43legacy_dma_write(struct b43legacy_dmaring *ring, |
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u16 offset, u32 value) |
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{ |
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b43legacy_write32(ring->dev, ring->mmio_base + offset, value); |
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} |
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int b43legacy_dma_init(struct b43legacy_wldev *dev); |
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void b43legacy_dma_free(struct b43legacy_wldev *dev); |
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void b43legacy_dma_tx_suspend(struct b43legacy_wldev *dev); |
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void b43legacy_dma_tx_resume(struct b43legacy_wldev *dev); |
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int b43legacy_dma_tx(struct b43legacy_wldev *dev, |
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struct sk_buff *skb); |
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void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, |
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const struct b43legacy_txstatus *status); |
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void b43legacy_dma_rx(struct b43legacy_dmaring *ring); |
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#else /* CONFIG_B43LEGACY_DMA */ |
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static inline |
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int b43legacy_dma_init(struct b43legacy_wldev *dev) |
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{ |
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return 0; |
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} |
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static inline |
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void b43legacy_dma_free(struct b43legacy_wldev *dev) |
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{ |
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} |
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static inline |
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int b43legacy_dma_tx(struct b43legacy_wldev *dev, |
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struct sk_buff *skb) |
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{ |
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return 0; |
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} |
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static inline |
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void b43legacy_dma_handle_txstatus(struct b43legacy_wldev *dev, |
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const struct b43legacy_txstatus *status) |
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{ |
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} |
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static inline |
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void b43legacy_dma_rx(struct b43legacy_dmaring *ring) |
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{ |
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} |
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static inline |
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void b43legacy_dma_tx_suspend(struct b43legacy_wldev *dev) |
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{ |
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} |
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static inline |
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void b43legacy_dma_tx_resume(struct b43legacy_wldev *dev) |
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{ |
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} |
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#endif /* CONFIG_B43LEGACY_DMA */ |
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#endif /* B43legacy_DMA_H_ */
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