#ifndef BCM43xx_DMA_H_
#define BCM43xx_DMA_H_
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/dma-mapping.h>
#include <linux/linkage.h>
#include <asm/atomic.h>
/* DMA-Interrupt reasons. */
#define BCM43xx_DMAIRQ_FATALMASK ((1 << 10) | (1 << 11) | (1 << 12) \
| (1 << 14) | (1 << 15))
#define BCM43xx_DMAIRQ_NONFATALMASK (1 << 13)
#define BCM43xx_DMAIRQ_RX_DONE (1 << 16)
/*** 32-bit DMA Engine. ***/
/* 32-bit DMA controller registers. */
#define BCM43xx_DMA32_TXCTL 0x00
#define BCM43xx_DMA32_TXENABLE 0x00000001
#define BCM43xx_DMA32_TXSUSPEND 0x00000002
#define BCM43xx_DMA32_TXLOOPBACK 0x00000004
#define BCM43xx_DMA32_TXFLUSH 0x00000010
#define BCM43xx_DMA32_TXADDREXT_MASK 0x00030000
#define BCM43xx_DMA32_TXADDREXT_SHIFT 16
#define BCM43xx_DMA32_TXRING 0x04
#define BCM43xx_DMA32_TXINDEX 0x08
#define BCM43xx_DMA32_TXSTATUS 0x0C
#define BCM43xx_DMA32_TXDPTR 0x00000FFF
#define BCM43xx_DMA32_TXSTATE 0x0000F000
#define BCM43xx_DMA32_TXSTAT_DISABLED 0x00000000
#define BCM43xx_DMA32_TXSTAT_ACTIVE 0x00001000
#define BCM43xx_DMA32_TXSTAT_IDLEWAIT 0x00002000
#define BCM43xx_DMA32_TXSTAT_STOPPED 0x00003000
#define BCM43xx_DMA32_TXSTAT_SUSP 0x00004000
#define BCM43xx_DMA32_TXERROR 0x000F0000
#define BCM43xx_DMA32_TXERR_NOERR 0x00000000
#define BCM43xx_DMA32_TXERR_PROT 0x00010000
#define BCM43xx_DMA32_TXERR_UNDERRUN 0x00020000
#define BCM43xx_DMA32_TXERR_BUFREAD 0x00030000
#define BCM43xx_DMA32_TXERR_DESCREAD 0x00040000
#define BCM43xx_DMA32_TXACTIVE 0xFFF00000
#define BCM43xx_DMA32_RXCTL 0x10
#define BCM43xx_DMA32_RXENABLE 0x00000001
#define BCM43xx_DMA32_RXFROFF_MASK 0x000000FE
#define BCM43xx_DMA32_RXFROFF_SHIFT 1
#define BCM43xx_DMA32_RXDIRECTFIFO 0x00000100
#define BCM43xx_DMA32_RXADDREXT_MASK 0x00030000
#define BCM43xx_DMA32_RXADDREXT_SHIFT 16
#define BCM43xx_DMA32_RXRING 0x14
#define BCM43xx_DMA32_RXINDEX 0x18
#define BCM43xx_DMA32_RXSTATUS 0x1C
#define BCM43xx_DMA32_RXDPTR 0x00000FFF
#define BCM43xx_DMA32_RXSTATE 0x0000F000
#define BCM43xx_DMA32_RXSTAT_DISABLED 0x00000000
#define BCM43xx_DMA32_RXSTAT_ACTIVE 0x00001000
#define BCM43xx_DMA32_RXSTAT_IDLEWAIT 0x00002000
#define BCM43xx_DMA32_RXSTAT_STOPPED 0x00003000
#define BCM43xx_DMA32_RXERROR 0x000F0000
#define BCM43xx_DMA32_RXERR_NOERR 0x00000000
#define BCM43xx_DMA32_RXERR_PROT 0x00010000
#define BCM43xx_DMA32_RXERR_OVERFLOW 0x00020000
#define BCM43xx_DMA32_RXERR_BUFWRITE 0x00030000
#define BCM43xx_DMA32_RXERR_DESCREAD 0x00040000
#define BCM43xx_DMA32_RXACTIVE 0xFFF00000
/* 32-bit DMA descriptor. */
struct bcm43xx_dmadesc32 {
__le32 control;
__le32 address;
} __attribute__((__packed__));
#define BCM43xx_DMA32_DCTL_BYTECNT 0x00001FFF
#define BCM43xx_DMA32_DCTL_ADDREXT_MASK 0x00030000
#define BCM43xx_DMA32_DCTL_ADDREXT_SHIFT 16
#define BCM43xx_DMA32_DCTL_DTABLEEND 0x10000000
#define BCM43xx_DMA32_DCTL_IRQ 0x20000000
#define BCM43xx_DMA32_DCTL_FRAMEEND 0x40000000
#define BCM43xx_DMA32_DCTL_FRAMESTART 0x80000000
/* Address field Routing value. */
#define BCM43xx_DMA32_ROUTING 0xC0000000
#define BCM43xx_DMA32_ROUTING_SHIFT 30
#define BCM43xx_DMA32_NOTRANS 0x00000000
#define BCM43xx_DMA32_CLIENTTRANS 0x40000000
/*** 64-bit DMA Engine. ***/
/* 64-bit DMA controller registers. */
#define BCM43xx_DMA64_TXCTL 0x00
#define BCM43xx_DMA64_TXENABLE 0x00000001
#define BCM43xx_DMA64_TXSUSPEND 0x00000002
#define BCM43xx_DMA64_TXLOOPBACK 0x00000004
#define BCM43xx_DMA64_TXFLUSH 0x00000010
#define BCM43xx_DMA64_TXADDREXT_MASK 0x00030000
#define BCM43xx_DMA64_TXADDREXT_SHIFT 16
#define BCM43xx_DMA64_TXINDEX 0x04
#define BCM43xx_DMA64_TXRINGLO 0x08
#define BCM43xx_DMA64_TXRINGHI 0x0C
#define BCM43xx_DMA64_TXSTATUS 0x10
#define BCM43xx_DMA64_TXSTATDPTR 0x00001FFF
#define BCM43xx_DMA64_TXSTAT 0xF0000000
#define BCM43xx_DMA64_TXSTAT_DISABLED 0x00000000
#define BCM43xx_DMA64_TXSTAT_ACTIVE 0x10000000
#define BCM43xx_DMA64_TXSTAT_IDLEWAIT 0x20000000
#define BCM43xx_DMA64_TXSTAT_STOPPED 0x30000000
#define BCM43xx_DMA64_TXSTAT_SUSP 0x40000000
#define BCM43xx_DMA64_TXERROR 0x14
#define BCM43xx_DMA64_TXERRDPTR 0x0001FFFF
#define BCM43xx_DMA64_TXERR 0xF0000000
#define BCM43xx_DMA64_TXERR_NOERR 0x00000000
#define BCM43xx_DMA64_TXERR_PROT 0x10000000
#define BCM43xx_DMA64_TXERR_UNDERRUN 0x20000000
#define BCM43xx_DMA64_TXERR_TRANSFER 0x30000000
#define BCM43xx_DMA64_TXERR_DESCREAD 0x40000000
#define BCM43xx_DMA64_TXERR_CORE 0x50000000
#define BCM43xx_DMA64_RXCTL 0x20
#define BCM43xx_DMA64_RXENABLE 0x00000001
#define BCM43xx_DMA64_RXFROFF_MASK 0x000000FE
#define BCM43xx_DMA64_RXFROFF_SHIFT 1
#define BCM43xx_DMA64_RXDIRECTFIFO 0x00000100
#define BCM43xx_DMA64_RXADDREXT_MASK 0x00030000
#define BCM43xx_DMA64_RXADDREXT_SHIFT 16
#define BCM43xx_DMA64_RXINDEX 0x24
#define BCM43xx_DMA64_RXRINGLO 0x28
#define BCM43xx_DMA64_RXRINGHI 0x2C
#define BCM43xx_DMA64_RXSTATUS 0x30
#define BCM43xx_DMA64_RXSTATDPTR 0x00001FFF
#define BCM43xx_DMA64_RXSTAT 0xF0000000
#define BCM43xx_DMA64_RXSTAT_DISABLED 0x00000000
#define BCM43xx_DMA64_RXSTAT_ACTIVE 0x10000000
#define BCM43xx_DMA64_RXSTAT_IDLEWAIT 0x20000000
#define BCM43xx_DMA64_RXSTAT_STOPPED 0x30000000
#define BCM43xx_DMA64_RXSTAT_SUSP 0x40000000
#define BCM43xx_DMA64_RXERROR 0x34
#define BCM43xx_DMA64_RXERRDPTR 0x0001FFFF
#define BCM43xx_DMA64_RXERR 0xF0000000
#define BCM43xx_DMA64_RXERR_NOERR 0x00000000
#define BCM43xx_DMA64_RXERR_PROT 0x10000000
#define BCM43xx_DMA64_RXERR_UNDERRUN 0x20000000
#define BCM43xx_DMA64_RXERR_TRANSFER 0x30000000
#define BCM43xx_DMA64_RXERR_DESCREAD 0x40000000
#define BCM43xx_DMA64_RXERR_CORE 0x50000000
/* 64-bit DMA descriptor. */
struct bcm43xx_dmadesc64 {
__le32 control0;
__le32 control1;
__le32 address_low;
__le32 address_high;
} __attribute__((__packed__));
#define BCM43xx_DMA64_DCTL0_DTABLEEND 0x10000000
#define BCM43xx_DMA64_DCTL0_IRQ 0x20000000
#define BCM43xx_DMA64_DCTL0_FRAMEEND 0x40000000
#define BCM43xx_DMA64_DCTL0_FRAMESTART 0x80000000
#define BCM43xx_DMA64_DCTL1_BYTECNT 0x00001FFF
#define BCM43xx_DMA64_DCTL1_ADDREXT_MASK 0x00030000
#define BCM43xx_DMA64_DCTL1_ADDREXT_SHIFT 16
/* Address field Routing value. */
#define BCM43xx_DMA64_ROUTING 0xC0000000
#define BCM43xx_DMA64_ROUTING_SHIFT 30
#define BCM43xx_DMA64_NOTRANS 0x00000000
#define BCM43xx_DMA64_CLIENTTRANS 0x80000000
struct bcm43xx_dmadesc_generic {
union {
struct bcm43xx_dmadesc32 dma32;
struct bcm43xx_dmadesc64 dma64;
} __attribute__((__packed__));
} __attribute__((__packed__));
/* Misc DMA constants */
#define BCM43xx_DMA_RINGMEMSIZE PAGE_SIZE
#define BCM43xx_DMA0_RX_FRAMEOFFSET 30
#define BCM43xx_DMA3_RX_FRAMEOFFSET 0
/* DMA engine tuning knobs */
#define BCM43xx_TXRING_SLOTS 512
#define BCM43xx_RXRING_SLOTS 64
#define BCM43xx_DMA0_RX_BUFFERSIZE (2304 + 100)
#define BCM43xx_DMA3_RX_BUFFERSIZE 16
/* Suspend the tx queue, if less than this percent slots are free. */
#define BCM43xx_TXSUSPEND_PERCENT 20
/* Resume the tx queue, if more than this percent slots are free. */
#define BCM43xx_TXRESUME_PERCENT 50
#ifdef CONFIG_BCM43XX_DMA
struct sk_buff;
struct bcm43xx_private;
struct bcm43xx_xmitstatus;
struct bcm43xx_dmadesc_meta {
/* The kernel DMA-able buffer. */
struct sk_buff *skb;
/* DMA base bus-address of the descriptor buffer. */
dma_addr_t dmaaddr;
};
struct bcm43xx_dmaring {
/* Kernel virtual base address of the ring memory. */
void *descbase;
/* Meta data about all descriptors. */
struct bcm43xx_dmadesc_meta *meta;
/* DMA Routing value. */
u32 routing;
/* (Unadjusted) DMA base bus-address of the ring memory. */
dma_addr_t dmabase;
/* Number of descriptor slots in the ring. */
int nr_slots;
/* Number of used descriptor slots. */
int used_slots;
/* Currently used slot in the ring. */
int current_slot;
/* Marks to suspend/resume the queue. */
int suspend_mark;
int resume_mark;
/* Frameoffset in octets. */
u32 frameoffset;
/* Descriptor buffer size. */
u16 rx_buffersize;
/* The MMIO base register of the DMA controller. */
u16 mmio_base;
/* DMA controller index number (0-5). */
int index;
/* Boolean. Is this a TX ring? */
u8 tx;
/* Boolean. 64bit DMA if true, 32bit DMA otherwise. */
u8 dma64;
/* Boolean. Are transfers suspended on this ring? */
u8 suspended;
struct bcm43xx_private *bcm;
#ifdef CONFIG_BCM43XX_DEBUG
/* Maximum number of used slots. */
int max_used_slots;
#endif /* CONFIG_BCM43XX_DEBUG*/
};
static inline
int bcm43xx_dma_desc2idx(struct bcm43xx_dmaring *ring,
struct bcm43xx_dmadesc_generic *desc)
{
if (ring->dma64) {
struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
return (int)(&(desc->dma64) - dd64);
} else {
struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
return (int)(&(desc->dma32) - dd32);
}
}
static inline
struct bcm43xx_dmadesc_generic * bcm43xx_dma_idx2desc(struct bcm43xx_dmaring *ring,
int slot,
struct bcm43xx_dmadesc_meta **meta)
{
*meta = &(ring->meta[slot]);
if (ring->dma64) {
struct bcm43xx_dmadesc64 *dd64 = ring->descbase;
return (struct bcm43xx_dmadesc_generic *)(&(dd64[slot]));
} else {
struct bcm43xx_dmadesc32 *dd32 = ring->descbase;
return (struct bcm43xx_dmadesc_generic *)(&(dd32[slot]));
}
}
static inline
u32 bcm43xx_dma_read(struct bcm43xx_dmaring *ring,
u16 offset)
{
return bcm43xx_read32(ring->bcm, ring->mmio_base + offset);
}
static inline
void bcm43xx_dma_write(struct bcm43xx_dmaring *ring,
u16 offset, u32 value)
{
bcm43xx_write32(ring->bcm, ring->mmio_base + offset, value);
}
int bcm43xx_dma_init(struct bcm43xx_private *bcm);
void bcm43xx_dma_free(struct bcm43xx_private *bcm);
int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
u16 dmacontroller_mmio_base,
int dma64);
int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
u16 dmacontroller_mmio_base,
int dma64);
u16 bcm43xx_dmacontroller_base(int dma64bit, int dmacontroller_idx);
void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring);
void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring);
void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
struct bcm43xx_xmitstatus *status);
int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
struct ieee80211_txb *txb);
void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring);
/* Helper function that returns the dma mask for this device. */
static inline
u64 bcm43xx_get_supported_dma_mask(struct bcm43xx_private *bcm)
{
int dma64 = bcm43xx_read32(bcm, BCM43xx_CIR_SBTMSTATEHIGH) &
BCM43xx_SBTMSTATEHIGH_DMA64BIT;
u16 mmio_base = bcm43xx_dmacontroller_base(dma64, 0);
u32 mask = BCM43xx_DMA32_TXADDREXT_MASK;
if (dma64)
return DMA_64BIT_MASK;
bcm43xx_write32(bcm, mmio_base + BCM43xx_DMA32_TXCTL, mask);
if (bcm43xx_read32(bcm, mmio_base + BCM43xx_DMA32_TXCTL) & mask)
return DMA_32BIT_MASK;
return DMA_30BIT_MASK;
}
#else /* CONFIG_BCM43XX_DMA */
static inline
int bcm43xx_dma_init(struct bcm43xx_private *bcm)
{
return 0;
}
static inline
void bcm43xx_dma_free(struct bcm43xx_private *bcm)
{
}
static inline
int bcm43xx_dmacontroller_rx_reset(struct bcm43xx_private *bcm,
u16 dmacontroller_mmio_base,
int dma64)
{
return 0;
}
static inline
int bcm43xx_dmacontroller_tx_reset(struct bcm43xx_private *bcm,
u16 dmacontroller_mmio_base,
int dma64)
{
return 0;
}
static inline
int bcm43xx_dma_tx(struct bcm43xx_private *bcm,
struct ieee80211_txb *txb)
{
return 0;
}
static inline
void bcm43xx_dma_handle_xmitstatus(struct bcm43xx_private *bcm,
struct bcm43xx_xmitstatus *status)
{
}
static inline
void bcm43xx_dma_rx(struct bcm43xx_dmaring *ring)
{
}
static inline
void bcm43xx_dma_tx_suspend(struct bcm43xx_dmaring *ring)
{
}
static inline
void bcm43xx_dma_tx_resume(struct bcm43xx_dmaring *ring)
{
}
#endif /* CONFIG_BCM43XX_DMA */
#endif /* BCM43xx_DMA_H_ */
