/* * Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * The full GNU General Public License is included in this distribution in the * file called COPYING. */ #ifndef IOATDMA_H #define IOATDMA_H #include #include "hw.h" #include #include #include #include #include #define IOAT_DMA_VERSION "3.64" #define IOAT_LOW_COMPLETION_MASK 0xffffffc0 #define IOAT_DMA_DCA_ANY_CPU ~0 #define IOAT_WATCHDOG_PERIOD (2 * HZ) #define to_ioat_chan(chan) container_of(chan, struct ioat_dma_chan, common) #define to_ioatdma_device(dev) container_of(dev, struct ioatdma_device, common) #define to_ioat_desc(lh) container_of(lh, struct ioat_desc_sw, node) #define tx_to_ioat_desc(tx) container_of(tx, struct ioat_desc_sw, txd) #define to_dev(ioat_chan) (&(ioat_chan)->device->pdev->dev) #define chan_num(ch) ((int)((ch)->reg_base - (ch)->device->reg_base) / 0x80) #define RESET_DELAY msecs_to_jiffies(100) #define WATCHDOG_DELAY round_jiffies(msecs_to_jiffies(2000)) /* * workaround for IOAT ver.3.0 null descriptor issue * (channel returns error when size is 0) */ #define NULL_DESC_BUFFER_SIZE 1 /** * struct ioatdma_device - internal representation of a IOAT device * @pdev: PCI-Express device * @reg_base: MMIO register space base address * @dma_pool: for allocating DMA descriptors * @common: embedded struct dma_device * @version: version of ioatdma device * @msix_entries: irq handlers * @idx: per channel data * @dca: direct cache access context * @intr_quirk: interrupt setup quirk (for ioat_v1 devices) */ struct ioatdma_device { struct pci_dev *pdev; void __iomem *reg_base; struct pci_pool *dma_pool; struct pci_pool *completion_pool; struct dma_device common; u8 version; struct delayed_work work; struct msix_entry msix_entries[4]; struct ioat_dma_chan *idx[4]; struct dca_provider *dca; void (*intr_quirk)(struct ioatdma_device *device); }; /** * struct ioat_dma_chan - internal representation of a DMA channel */ struct ioat_dma_chan { void __iomem *reg_base; dma_cookie_t completed_cookie; unsigned long last_completion; unsigned long last_completion_time; size_t xfercap; /* XFERCAP register value expanded out */ spinlock_t cleanup_lock; spinlock_t desc_lock; struct list_head free_desc; struct list_head used_desc; unsigned long watchdog_completion; int watchdog_tcp_cookie; u32 watchdog_last_tcp_cookie; struct delayed_work work; int pending; int dmacount; int desccount; struct ioatdma_device *device; struct dma_chan common; dma_addr_t completion_addr; union { u64 full; /* HW completion writeback */ struct { u32 low; u32 high; }; } *completion_virt; unsigned long last_compl_desc_addr_hw; struct tasklet_struct cleanup_task; }; /* wrapper around hardware descriptor format + additional software fields */ /** * struct ioat_desc_sw - wrapper around hardware descriptor * @hw: hardware DMA descriptor * @node: this descriptor will either be on the free list, * or attached to a transaction list (async_tx.tx_list) * @tx_cnt: number of descriptors required to complete the transaction * @txd: the generic software descriptor for all engines */ struct ioat_desc_sw { struct ioat_dma_descriptor *hw; struct list_head node; int tx_cnt; size_t len; dma_addr_t src; dma_addr_t dst; struct dma_async_tx_descriptor txd; }; static inline void ioat_set_tcp_copy_break(unsigned long copybreak) { #ifdef CONFIG_NET_DMA sysctl_tcp_dma_copybreak = copybreak; #endif } int ioat1_dma_probe(struct ioatdma_device *dev, int dca); int ioat2_dma_probe(struct ioatdma_device *dev, int dca); int ioat3_dma_probe(struct ioatdma_device *dev, int dca); void ioat_dma_remove(struct ioatdma_device *device); struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase); struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase); struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase); #endif /* IOATDMA_H */