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-rw-r--r--drivers/net/sfc/falcon_io.h258
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diff --git a/drivers/net/sfc/falcon_io.h b/drivers/net/sfc/falcon_io.h
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index 8883092dae97..000000000000
--- a/drivers/net/sfc/falcon_io.h
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@@ -1,258 +0,0 @@
-/****************************************************************************
- * Driver for Solarflare Solarstorm network controllers and boards
- * Copyright 2005-2006 Fen Systems Ltd.
- * Copyright 2006-2008 Solarflare Communications Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation, incorporated herein by reference.
- */
-
-#ifndef EFX_FALCON_IO_H
-#define EFX_FALCON_IO_H
-
-#include <linux/io.h>
-#include <linux/spinlock.h>
-
-/**************************************************************************
- *
- * Falcon hardware access
- *
- **************************************************************************
- *
- * Notes on locking strategy:
- *
- * Most Falcon registers require 16-byte (or 8-byte, for SRAM
- * registers) atomic writes which necessitates locking.
- * Under normal operation few writes to the Falcon BAR are made and these
- * registers (EVQ_RPTR_REG, RX_DESC_UPD_REG and TX_DESC_UPD_REG) are special
- * cased to allow 4-byte (hence lockless) accesses.
- *
- * It *is* safe to write to these 4-byte registers in the middle of an
- * access to an 8-byte or 16-byte register. We therefore use a
- * spinlock to protect accesses to the larger registers, but no locks
- * for the 4-byte registers.
- *
- * A write barrier is needed to ensure that DW3 is written after DW0/1/2
- * due to the way the 16byte registers are "collected" in the Falcon BIU
- *
- * We also lock when carrying out reads, to ensure consistency of the
- * data (made possible since the BIU reads all 128 bits into a cache).
- * Reads are very rare, so this isn't a significant performance
- * impact. (Most data transferred from NIC to host is DMAed directly
- * into host memory).
- *
- * I/O BAR access uses locks for both reads and writes (but is only provided
- * for testing purposes).
- */
-
-/* Special buffer descriptors (Falcon SRAM) */
-#define BUF_TBL_KER_A1 0x18000
-#define BUF_TBL_KER_B0 0x800000
-
-
-#if BITS_PER_LONG == 64
-#define FALCON_USE_QWORD_IO 1
-#endif
-
-#ifdef FALCON_USE_QWORD_IO
-static inline void _falcon_writeq(struct efx_nic *efx, __le64 value,
- unsigned int reg)
-{
- __raw_writeq((__force u64)value, efx->membase + reg);
-}
-static inline __le64 _falcon_readq(struct efx_nic *efx, unsigned int reg)
-{
- return (__force __le64)__raw_readq(efx->membase + reg);
-}
-#endif
-
-static inline void _falcon_writel(struct efx_nic *efx, __le32 value,
- unsigned int reg)
-{
- __raw_writel((__force u32)value, efx->membase + reg);
-}
-static inline __le32 _falcon_readl(struct efx_nic *efx, unsigned int reg)
-{
- return (__force __le32)__raw_readl(efx->membase + reg);
-}
-
-/* Writes to a normal 16-byte Falcon register, locking as appropriate. */
-static inline void falcon_write(struct efx_nic *efx, efx_oword_t *value,
- unsigned int reg)
-{
- unsigned long flags;
-
- EFX_REGDUMP(efx, "writing register %x with " EFX_OWORD_FMT "\n", reg,
- EFX_OWORD_VAL(*value));
-
- spin_lock_irqsave(&efx->biu_lock, flags);
-#ifdef FALCON_USE_QWORD_IO
- _falcon_writeq(efx, value->u64[0], reg + 0);
- wmb();
- _falcon_writeq(efx, value->u64[1], reg + 8);
-#else
- _falcon_writel(efx, value->u32[0], reg + 0);
- _falcon_writel(efx, value->u32[1], reg + 4);
- _falcon_writel(efx, value->u32[2], reg + 8);
- wmb();
- _falcon_writel(efx, value->u32[3], reg + 12);
-#endif
- mmiowb();
- spin_unlock_irqrestore(&efx->biu_lock, flags);
-}
-
-/* Writes to an 8-byte Falcon SRAM register, locking as appropriate. */
-static inline void falcon_write_sram(struct efx_nic *efx, efx_qword_t *value,
- unsigned int index)
-{
- unsigned int reg = efx->type->buf_tbl_base + (index * sizeof(*value));
- unsigned long flags;
-
- EFX_REGDUMP(efx, "writing SRAM register %x with " EFX_QWORD_FMT "\n",
- reg, EFX_QWORD_VAL(*value));
-
- spin_lock_irqsave(&efx->biu_lock, flags);
-#ifdef FALCON_USE_QWORD_IO
- _falcon_writeq(efx, value->u64[0], reg + 0);
-#else
- _falcon_writel(efx, value->u32[0], reg + 0);
- wmb();
- _falcon_writel(efx, value->u32[1], reg + 4);
-#endif
- mmiowb();
- spin_unlock_irqrestore(&efx->biu_lock, flags);
-}
-
-/* Write dword to Falcon register that allows partial writes
- *
- * Some Falcon registers (EVQ_RPTR_REG, RX_DESC_UPD_REG and
- * TX_DESC_UPD_REG) can be written to as a single dword. This allows
- * for lockless writes.
- */
-static inline void falcon_writel(struct efx_nic *efx, efx_dword_t *value,
- unsigned int reg)
-{
- EFX_REGDUMP(efx, "writing partial register %x with "EFX_DWORD_FMT"\n",
- reg, EFX_DWORD_VAL(*value));
-
- /* No lock required */
- _falcon_writel(efx, value->u32[0], reg);
-}
-
-/* Read from a Falcon register
- *
- * This reads an entire 16-byte Falcon register in one go, locking as
- * appropriate. It is essential to read the first dword first, as this
- * prompts Falcon to load the current value into the shadow register.
- */
-static inline void falcon_read(struct efx_nic *efx, efx_oword_t *value,
- unsigned int reg)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&efx->biu_lock, flags);
- value->u32[0] = _falcon_readl(efx, reg + 0);
- rmb();
- value->u32[1] = _falcon_readl(efx, reg + 4);
- value->u32[2] = _falcon_readl(efx, reg + 8);
- value->u32[3] = _falcon_readl(efx, reg + 12);
- spin_unlock_irqrestore(&efx->biu_lock, flags);
-
- EFX_REGDUMP(efx, "read from register %x, got " EFX_OWORD_FMT "\n", reg,
- EFX_OWORD_VAL(*value));
-}
-
-/* This reads an 8-byte Falcon SRAM entry in one go. */
-static inline void falcon_read_sram(struct efx_nic *efx, efx_qword_t *value,
- unsigned int index)
-{
- unsigned int reg = efx->type->buf_tbl_base + (index * sizeof(*value));
- unsigned long flags;
-
- spin_lock_irqsave(&efx->biu_lock, flags);
-#ifdef FALCON_USE_QWORD_IO
- value->u64[0] = _falcon_readq(efx, reg + 0);
-#else
- value->u32[0] = _falcon_readl(efx, reg + 0);
- rmb();
- value->u32[1] = _falcon_readl(efx, reg + 4);
-#endif
- spin_unlock_irqrestore(&efx->biu_lock, flags);
-
- EFX_REGDUMP(efx, "read from SRAM register %x, got "EFX_QWORD_FMT"\n",
- reg, EFX_QWORD_VAL(*value));
-}
-
-/* Read dword from Falcon register that allows partial writes (sic) */
-static inline void falcon_readl(struct efx_nic *efx, efx_dword_t *value,
- unsigned int reg)
-{
- value->u32[0] = _falcon_readl(efx, reg);
- EFX_REGDUMP(efx, "read from register %x, got "EFX_DWORD_FMT"\n",
- reg, EFX_DWORD_VAL(*value));
-}
-
-/* Write to a register forming part of a table */
-static inline void falcon_write_table(struct efx_nic *efx, efx_oword_t *value,
- unsigned int reg, unsigned int index)
-{
- falcon_write(efx, value, reg + index * sizeof(efx_oword_t));
-}
-
-/* Read to a register forming part of a table */
-static inline void falcon_read_table(struct efx_nic *efx, efx_oword_t *value,
- unsigned int reg, unsigned int index)
-{
- falcon_read(efx, value, reg + index * sizeof(efx_oword_t));
-}
-
-/* Write to a dword register forming part of a table */
-static inline void falcon_writel_table(struct efx_nic *efx, efx_dword_t *value,
- unsigned int reg, unsigned int index)
-{
- falcon_writel(efx, value, reg + index * sizeof(efx_oword_t));
-}
-
-/* Page-mapped register block size */
-#define FALCON_PAGE_BLOCK_SIZE 0x2000
-
-/* Calculate offset to page-mapped register block */
-#define FALCON_PAGED_REG(page, reg) \
- ((page) * FALCON_PAGE_BLOCK_SIZE + (reg))
-
-/* As for falcon_write(), but for a page-mapped register. */
-static inline void falcon_write_page(struct efx_nic *efx, efx_oword_t *value,
- unsigned int reg, unsigned int page)
-{
- falcon_write(efx, value, FALCON_PAGED_REG(page, reg));
-}
-
-/* As for falcon_writel(), but for a page-mapped register. */
-static inline void falcon_writel_page(struct efx_nic *efx, efx_dword_t *value,
- unsigned int reg, unsigned int page)
-{
- falcon_writel(efx, value, FALCON_PAGED_REG(page, reg));
-}
-
-/* Write dword to Falcon page-mapped register with an extra lock.
- *
- * As for falcon_writel_page(), but for a register that suffers from
- * SFC bug 3181. If writing to page 0, take out a lock so the BIU
- * collector cannot be confused.
- */
-static inline void falcon_writel_page_locked(struct efx_nic *efx,
- efx_dword_t *value,
- unsigned int reg,
- unsigned int page)
-{
- unsigned long flags = 0;
-
- if (page == 0)
- spin_lock_irqsave(&efx->biu_lock, flags);
- falcon_writel(efx, value, FALCON_PAGED_REG(page, reg));
- if (page == 0)
- spin_unlock_irqrestore(&efx->biu_lock, flags);
-}
-
-#endif /* EFX_FALCON_IO_H */