1455 lines
38 KiB
C
1455 lines
38 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Intel I/OAT DMA Linux driver
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* Copyright(c) 2004 - 2015 Intel Corporation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/dmaengine.h>
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#include <linux/delay.h>
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#include <linux/dma-mapping.h>
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#include <linux/workqueue.h>
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#include <linux/prefetch.h>
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#include <linux/dca.h>
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#include <linux/sizes.h>
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#include "dma.h"
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#include "registers.h"
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#include "hw.h"
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#include "../dmaengine.h"
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MODULE_VERSION(IOAT_DMA_VERSION);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_AUTHOR("Intel Corporation");
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static const struct pci_device_id ioat_pci_tbl[] = {
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/* I/OAT v3 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
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/* I/OAT v3.2 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SKX) },
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/* I/OAT v3.3 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) },
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/* I/OAT v3.4 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_ICX) },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
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static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
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static void ioat_remove(struct pci_dev *pdev);
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static void
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ioat_init_channel(struct ioatdma_device *ioat_dma,
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struct ioatdma_chan *ioat_chan, int idx);
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static void ioat_intr_quirk(struct ioatdma_device *ioat_dma);
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static void ioat_enumerate_channels(struct ioatdma_device *ioat_dma);
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static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma);
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static int ioat_dca_enabled = 1;
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module_param(ioat_dca_enabled, int, 0644);
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MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
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int ioat_pending_level = 7;
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module_param(ioat_pending_level, int, 0644);
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MODULE_PARM_DESC(ioat_pending_level,
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"high-water mark for pushing ioat descriptors (default: 7)");
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static char ioat_interrupt_style[32] = "msix";
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module_param_string(ioat_interrupt_style, ioat_interrupt_style,
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sizeof(ioat_interrupt_style), 0644);
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MODULE_PARM_DESC(ioat_interrupt_style,
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"set ioat interrupt style: msix (default), msi, intx");
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struct kmem_cache *ioat_cache;
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struct kmem_cache *ioat_sed_cache;
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static bool is_jf_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_JSF0:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF1:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF2:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF3:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF4:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF5:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF6:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF7:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF8:
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case PCI_DEVICE_ID_INTEL_IOAT_JSF9:
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return true;
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default:
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return false;
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}
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}
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static bool is_snb_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_SNB0:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB1:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB2:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB3:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB4:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB5:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB6:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB7:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB8:
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case PCI_DEVICE_ID_INTEL_IOAT_SNB9:
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return true;
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default:
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return false;
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}
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}
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static bool is_ivb_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_IVB0:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB1:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB2:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB3:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB4:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB5:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB6:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB7:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB8:
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case PCI_DEVICE_ID_INTEL_IOAT_IVB9:
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return true;
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default:
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return false;
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}
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}
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static bool is_hsw_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_HSW0:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW1:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW2:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW3:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW4:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW5:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW6:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW7:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW8:
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case PCI_DEVICE_ID_INTEL_IOAT_HSW9:
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return true;
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default:
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return false;
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}
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}
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static bool is_bdx_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_BDX0:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX1:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX2:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX3:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX4:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX5:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX6:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX7:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX8:
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case PCI_DEVICE_ID_INTEL_IOAT_BDX9:
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return true;
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default:
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return false;
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}
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}
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static inline bool is_skx_ioat(struct pci_dev *pdev)
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{
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return (pdev->device == PCI_DEVICE_ID_INTEL_IOAT_SKX) ? true : false;
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}
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static bool is_xeon_cb32(struct pci_dev *pdev)
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{
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return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) ||
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is_hsw_ioat(pdev) || is_bdx_ioat(pdev) || is_skx_ioat(pdev);
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}
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bool is_bwd_ioat(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_BWD0:
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case PCI_DEVICE_ID_INTEL_IOAT_BWD1:
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case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
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case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
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/* even though not Atom, BDX-DE has same DMA silicon */
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
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return true;
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default:
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return false;
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}
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}
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static bool is_bwd_noraid(struct pci_dev *pdev)
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{
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switch (pdev->device) {
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case PCI_DEVICE_ID_INTEL_IOAT_BWD2:
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case PCI_DEVICE_ID_INTEL_IOAT_BWD3:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2:
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case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3:
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return true;
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default:
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return false;
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}
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}
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/*
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* Perform a IOAT transaction to verify the HW works.
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*/
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#define IOAT_TEST_SIZE 2000
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static void ioat_dma_test_callback(void *dma_async_param)
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{
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struct completion *cmp = dma_async_param;
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complete(cmp);
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}
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/**
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* ioat_dma_self_test - Perform a IOAT transaction to verify the HW works.
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* @ioat_dma: dma device to be tested
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*/
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static int ioat_dma_self_test(struct ioatdma_device *ioat_dma)
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{
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int i;
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u8 *src;
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u8 *dest;
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struct dma_device *dma = &ioat_dma->dma_dev;
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struct device *dev = &ioat_dma->pdev->dev;
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struct dma_chan *dma_chan;
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struct dma_async_tx_descriptor *tx;
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dma_addr_t dma_dest, dma_src;
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dma_cookie_t cookie;
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int err = 0;
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struct completion cmp;
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unsigned long tmo;
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unsigned long flags;
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src = kzalloc(IOAT_TEST_SIZE, GFP_KERNEL);
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if (!src)
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return -ENOMEM;
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dest = kzalloc(IOAT_TEST_SIZE, GFP_KERNEL);
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if (!dest) {
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kfree(src);
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return -ENOMEM;
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}
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/* Fill in src buffer */
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for (i = 0; i < IOAT_TEST_SIZE; i++)
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src[i] = (u8)i;
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/* Start copy, using first DMA channel */
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dma_chan = container_of(dma->channels.next, struct dma_chan,
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device_node);
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if (dma->device_alloc_chan_resources(dma_chan) < 1) {
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dev_err(dev, "selftest cannot allocate chan resource\n");
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err = -ENODEV;
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goto out;
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}
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dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
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if (dma_mapping_error(dev, dma_src)) {
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dev_err(dev, "mapping src buffer failed\n");
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err = -ENOMEM;
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goto free_resources;
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}
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dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
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if (dma_mapping_error(dev, dma_dest)) {
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dev_err(dev, "mapping dest buffer failed\n");
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err = -ENOMEM;
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goto unmap_src;
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}
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flags = DMA_PREP_INTERRUPT;
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tx = ioat_dma->dma_dev.device_prep_dma_memcpy(dma_chan, dma_dest,
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dma_src, IOAT_TEST_SIZE,
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flags);
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if (!tx) {
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dev_err(dev, "Self-test prep failed, disabling\n");
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err = -ENODEV;
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goto unmap_dma;
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}
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async_tx_ack(tx);
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init_completion(&cmp);
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tx->callback = ioat_dma_test_callback;
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tx->callback_param = &cmp;
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cookie = tx->tx_submit(tx);
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if (cookie < 0) {
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dev_err(dev, "Self-test setup failed, disabling\n");
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err = -ENODEV;
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goto unmap_dma;
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}
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dma->device_issue_pending(dma_chan);
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tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
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if (tmo == 0 ||
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dma->device_tx_status(dma_chan, cookie, NULL)
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!= DMA_COMPLETE) {
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dev_err(dev, "Self-test copy timed out, disabling\n");
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err = -ENODEV;
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goto unmap_dma;
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}
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if (memcmp(src, dest, IOAT_TEST_SIZE)) {
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dev_err(dev, "Self-test copy failed compare, disabling\n");
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err = -ENODEV;
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goto unmap_dma;
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}
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unmap_dma:
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dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE);
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unmap_src:
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dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE);
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free_resources:
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dma->device_free_chan_resources(dma_chan);
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out:
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kfree(src);
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kfree(dest);
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return err;
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}
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/**
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* ioat_dma_setup_interrupts - setup interrupt handler
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* @ioat_dma: ioat dma device
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*/
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int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma)
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{
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struct ioatdma_chan *ioat_chan;
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struct pci_dev *pdev = ioat_dma->pdev;
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struct device *dev = &pdev->dev;
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struct msix_entry *msix;
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|
int i, j, msixcnt;
|
|
int err = -EINVAL;
|
|
u8 intrctrl = 0;
|
|
|
|
if (!strcmp(ioat_interrupt_style, "msix"))
|
|
goto msix;
|
|
if (!strcmp(ioat_interrupt_style, "msi"))
|
|
goto msi;
|
|
if (!strcmp(ioat_interrupt_style, "intx"))
|
|
goto intx;
|
|
dev_err(dev, "invalid ioat_interrupt_style %s\n", ioat_interrupt_style);
|
|
goto err_no_irq;
|
|
|
|
msix:
|
|
/* The number of MSI-X vectors should equal the number of channels */
|
|
msixcnt = ioat_dma->dma_dev.chancnt;
|
|
for (i = 0; i < msixcnt; i++)
|
|
ioat_dma->msix_entries[i].entry = i;
|
|
|
|
err = pci_enable_msix_exact(pdev, ioat_dma->msix_entries, msixcnt);
|
|
if (err)
|
|
goto msi;
|
|
|
|
for (i = 0; i < msixcnt; i++) {
|
|
msix = &ioat_dma->msix_entries[i];
|
|
ioat_chan = ioat_chan_by_index(ioat_dma, i);
|
|
err = devm_request_irq(dev, msix->vector,
|
|
ioat_dma_do_interrupt_msix, 0,
|
|
"ioat-msix", ioat_chan);
|
|
if (err) {
|
|
for (j = 0; j < i; j++) {
|
|
msix = &ioat_dma->msix_entries[j];
|
|
ioat_chan = ioat_chan_by_index(ioat_dma, j);
|
|
devm_free_irq(dev, msix->vector, ioat_chan);
|
|
}
|
|
goto msi;
|
|
}
|
|
}
|
|
intrctrl |= IOAT_INTRCTRL_MSIX_VECTOR_CONTROL;
|
|
ioat_dma->irq_mode = IOAT_MSIX;
|
|
goto done;
|
|
|
|
msi:
|
|
err = pci_enable_msi(pdev);
|
|
if (err)
|
|
goto intx;
|
|
|
|
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt, 0,
|
|
"ioat-msi", ioat_dma);
|
|
if (err) {
|
|
pci_disable_msi(pdev);
|
|
goto intx;
|
|
}
|
|
ioat_dma->irq_mode = IOAT_MSI;
|
|
goto done;
|
|
|
|
intx:
|
|
err = devm_request_irq(dev, pdev->irq, ioat_dma_do_interrupt,
|
|
IRQF_SHARED, "ioat-intx", ioat_dma);
|
|
if (err)
|
|
goto err_no_irq;
|
|
|
|
ioat_dma->irq_mode = IOAT_INTX;
|
|
done:
|
|
if (is_bwd_ioat(pdev))
|
|
ioat_intr_quirk(ioat_dma);
|
|
intrctrl |= IOAT_INTRCTRL_MASTER_INT_EN;
|
|
writeb(intrctrl, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
|
|
return 0;
|
|
|
|
err_no_irq:
|
|
/* Disable all interrupt generation */
|
|
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
|
|
ioat_dma->irq_mode = IOAT_NOIRQ;
|
|
dev_err(dev, "no usable interrupts\n");
|
|
return err;
|
|
}
|
|
|
|
static void ioat_disable_interrupts(struct ioatdma_device *ioat_dma)
|
|
{
|
|
/* Disable all interrupt generation */
|
|
writeb(0, ioat_dma->reg_base + IOAT_INTRCTRL_OFFSET);
|
|
}
|
|
|
|
static int ioat_probe(struct ioatdma_device *ioat_dma)
|
|
{
|
|
int err = -ENODEV;
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
struct pci_dev *pdev = ioat_dma->pdev;
|
|
struct device *dev = &pdev->dev;
|
|
|
|
ioat_dma->completion_pool = dma_pool_create("completion_pool", dev,
|
|
sizeof(u64),
|
|
SMP_CACHE_BYTES,
|
|
SMP_CACHE_BYTES);
|
|
|
|
if (!ioat_dma->completion_pool) {
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
ioat_enumerate_channels(ioat_dma);
|
|
|
|
dma_cap_set(DMA_MEMCPY, dma->cap_mask);
|
|
dma->dev = &pdev->dev;
|
|
|
|
if (!dma->chancnt) {
|
|
dev_err(dev, "channel enumeration error\n");
|
|
goto err_setup_interrupts;
|
|
}
|
|
|
|
err = ioat_dma_setup_interrupts(ioat_dma);
|
|
if (err)
|
|
goto err_setup_interrupts;
|
|
|
|
err = ioat3_dma_self_test(ioat_dma);
|
|
if (err)
|
|
goto err_self_test;
|
|
|
|
return 0;
|
|
|
|
err_self_test:
|
|
ioat_disable_interrupts(ioat_dma);
|
|
err_setup_interrupts:
|
|
dma_pool_destroy(ioat_dma->completion_pool);
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
static void ioat_dma_remove(struct ioatdma_device *ioat_dma)
|
|
{
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
|
|
ioat_disable_interrupts(ioat_dma);
|
|
|
|
ioat_kobject_del(ioat_dma);
|
|
|
|
dma_async_device_unregister(dma);
|
|
}
|
|
|
|
/**
|
|
* ioat_enumerate_channels - find and initialize the device's channels
|
|
* @ioat_dma: the ioat dma device to be enumerated
|
|
*/
|
|
static void ioat_enumerate_channels(struct ioatdma_device *ioat_dma)
|
|
{
|
|
struct ioatdma_chan *ioat_chan;
|
|
struct device *dev = &ioat_dma->pdev->dev;
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
u8 xfercap_log;
|
|
int i;
|
|
|
|
INIT_LIST_HEAD(&dma->channels);
|
|
dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET);
|
|
dma->chancnt &= 0x1f; /* bits [4:0] valid */
|
|
if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) {
|
|
dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n",
|
|
dma->chancnt, ARRAY_SIZE(ioat_dma->idx));
|
|
dma->chancnt = ARRAY_SIZE(ioat_dma->idx);
|
|
}
|
|
xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET);
|
|
xfercap_log &= 0x1f; /* bits [4:0] valid */
|
|
if (xfercap_log == 0)
|
|
return;
|
|
dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log);
|
|
|
|
for (i = 0; i < dma->chancnt; i++) {
|
|
ioat_chan = kzalloc(sizeof(*ioat_chan), GFP_KERNEL);
|
|
if (!ioat_chan)
|
|
break;
|
|
|
|
ioat_init_channel(ioat_dma, ioat_chan, i);
|
|
ioat_chan->xfercap_log = xfercap_log;
|
|
spin_lock_init(&ioat_chan->prep_lock);
|
|
if (ioat_reset_hw(ioat_chan)) {
|
|
i = 0;
|
|
break;
|
|
}
|
|
}
|
|
dma->chancnt = i;
|
|
}
|
|
|
|
/**
|
|
* ioat_free_chan_resources - release all the descriptors
|
|
* @c: the channel to be cleaned
|
|
*/
|
|
static void ioat_free_chan_resources(struct dma_chan *c)
|
|
{
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma;
|
|
struct ioat_ring_ent *desc;
|
|
const int total_descs = 1 << ioat_chan->alloc_order;
|
|
int descs;
|
|
int i;
|
|
|
|
/* Before freeing channel resources first check
|
|
* if they have been previously allocated for this channel.
|
|
*/
|
|
if (!ioat_chan->ring)
|
|
return;
|
|
|
|
ioat_stop(ioat_chan);
|
|
|
|
if (!test_bit(IOAT_CHAN_DOWN, &ioat_chan->state)) {
|
|
ioat_reset_hw(ioat_chan);
|
|
|
|
/* Put LTR to idle */
|
|
if (ioat_dma->version >= IOAT_VER_3_4)
|
|
writeb(IOAT_CHAN_LTR_SWSEL_IDLE,
|
|
ioat_chan->reg_base +
|
|
IOAT_CHAN_LTR_SWSEL_OFFSET);
|
|
}
|
|
|
|
spin_lock_bh(&ioat_chan->cleanup_lock);
|
|
spin_lock_bh(&ioat_chan->prep_lock);
|
|
descs = ioat_ring_space(ioat_chan);
|
|
dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs);
|
|
for (i = 0; i < descs; i++) {
|
|
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head + i);
|
|
ioat_free_ring_ent(desc, c);
|
|
}
|
|
|
|
if (descs < total_descs)
|
|
dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n",
|
|
total_descs - descs);
|
|
|
|
for (i = 0; i < total_descs - descs; i++) {
|
|
desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail + i);
|
|
dump_desc_dbg(ioat_chan, desc);
|
|
ioat_free_ring_ent(desc, c);
|
|
}
|
|
|
|
for (i = 0; i < ioat_chan->desc_chunks; i++) {
|
|
dma_free_coherent(to_dev(ioat_chan), IOAT_CHUNK_SIZE,
|
|
ioat_chan->descs[i].virt,
|
|
ioat_chan->descs[i].hw);
|
|
ioat_chan->descs[i].virt = NULL;
|
|
ioat_chan->descs[i].hw = 0;
|
|
}
|
|
ioat_chan->desc_chunks = 0;
|
|
|
|
kfree(ioat_chan->ring);
|
|
ioat_chan->ring = NULL;
|
|
ioat_chan->alloc_order = 0;
|
|
dma_pool_free(ioat_dma->completion_pool, ioat_chan->completion,
|
|
ioat_chan->completion_dma);
|
|
spin_unlock_bh(&ioat_chan->prep_lock);
|
|
spin_unlock_bh(&ioat_chan->cleanup_lock);
|
|
|
|
ioat_chan->last_completion = 0;
|
|
ioat_chan->completion_dma = 0;
|
|
ioat_chan->dmacount = 0;
|
|
}
|
|
|
|
/* ioat_alloc_chan_resources - allocate/initialize ioat descriptor ring
|
|
* @chan: channel to be initialized
|
|
*/
|
|
static int ioat_alloc_chan_resources(struct dma_chan *c)
|
|
{
|
|
struct ioatdma_chan *ioat_chan = to_ioat_chan(c);
|
|
struct ioat_ring_ent **ring;
|
|
u64 status;
|
|
int order;
|
|
int i = 0;
|
|
u32 chanerr;
|
|
|
|
/* have we already been set up? */
|
|
if (ioat_chan->ring)
|
|
return 1 << ioat_chan->alloc_order;
|
|
|
|
/* Setup register to interrupt and write completion status on error */
|
|
writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET);
|
|
|
|
/* allocate a completion writeback area */
|
|
/* doing 2 32bit writes to mmio since 1 64b write doesn't work */
|
|
ioat_chan->completion =
|
|
dma_pool_zalloc(ioat_chan->ioat_dma->completion_pool,
|
|
GFP_NOWAIT, &ioat_chan->completion_dma);
|
|
if (!ioat_chan->completion)
|
|
return -ENOMEM;
|
|
|
|
writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF,
|
|
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW);
|
|
writel(((u64)ioat_chan->completion_dma) >> 32,
|
|
ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH);
|
|
|
|
order = IOAT_MAX_ORDER;
|
|
ring = ioat_alloc_ring(c, order, GFP_NOWAIT);
|
|
if (!ring)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_bh(&ioat_chan->cleanup_lock);
|
|
spin_lock_bh(&ioat_chan->prep_lock);
|
|
ioat_chan->ring = ring;
|
|
ioat_chan->head = 0;
|
|
ioat_chan->issued = 0;
|
|
ioat_chan->tail = 0;
|
|
ioat_chan->alloc_order = order;
|
|
set_bit(IOAT_RUN, &ioat_chan->state);
|
|
spin_unlock_bh(&ioat_chan->prep_lock);
|
|
spin_unlock_bh(&ioat_chan->cleanup_lock);
|
|
|
|
/* Setting up LTR values for 3.4 or later */
|
|
if (ioat_chan->ioat_dma->version >= IOAT_VER_3_4) {
|
|
u32 lat_val;
|
|
|
|
lat_val = IOAT_CHAN_LTR_ACTIVE_SNVAL |
|
|
IOAT_CHAN_LTR_ACTIVE_SNLATSCALE |
|
|
IOAT_CHAN_LTR_ACTIVE_SNREQMNT;
|
|
writel(lat_val, ioat_chan->reg_base +
|
|
IOAT_CHAN_LTR_ACTIVE_OFFSET);
|
|
|
|
lat_val = IOAT_CHAN_LTR_IDLE_SNVAL |
|
|
IOAT_CHAN_LTR_IDLE_SNLATSCALE |
|
|
IOAT_CHAN_LTR_IDLE_SNREQMNT;
|
|
writel(lat_val, ioat_chan->reg_base +
|
|
IOAT_CHAN_LTR_IDLE_OFFSET);
|
|
|
|
/* Select to active */
|
|
writeb(IOAT_CHAN_LTR_SWSEL_ACTIVE,
|
|
ioat_chan->reg_base +
|
|
IOAT_CHAN_LTR_SWSEL_OFFSET);
|
|
}
|
|
|
|
ioat_start_null_desc(ioat_chan);
|
|
|
|
/* check that we got off the ground */
|
|
do {
|
|
udelay(1);
|
|
status = ioat_chansts(ioat_chan);
|
|
} while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status));
|
|
|
|
if (is_ioat_active(status) || is_ioat_idle(status))
|
|
return 1 << ioat_chan->alloc_order;
|
|
|
|
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
|
|
|
|
dev_WARN(to_dev(ioat_chan),
|
|
"failed to start channel chanerr: %#x\n", chanerr);
|
|
ioat_free_chan_resources(c);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* common channel initialization */
|
|
static void
|
|
ioat_init_channel(struct ioatdma_device *ioat_dma,
|
|
struct ioatdma_chan *ioat_chan, int idx)
|
|
{
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
|
|
ioat_chan->ioat_dma = ioat_dma;
|
|
ioat_chan->reg_base = ioat_dma->reg_base + (0x80 * (idx + 1));
|
|
spin_lock_init(&ioat_chan->cleanup_lock);
|
|
ioat_chan->dma_chan.device = dma;
|
|
dma_cookie_init(&ioat_chan->dma_chan);
|
|
list_add_tail(&ioat_chan->dma_chan.device_node, &dma->channels);
|
|
ioat_dma->idx[idx] = ioat_chan;
|
|
timer_setup(&ioat_chan->timer, ioat_timer_event, 0);
|
|
tasklet_setup(&ioat_chan->cleanup_task, ioat_cleanup_event);
|
|
}
|
|
|
|
#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
|
|
static int ioat_xor_val_self_test(struct ioatdma_device *ioat_dma)
|
|
{
|
|
int i, src_idx;
|
|
struct page *dest;
|
|
struct page *xor_srcs[IOAT_NUM_SRC_TEST];
|
|
struct page *xor_val_srcs[IOAT_NUM_SRC_TEST + 1];
|
|
dma_addr_t dma_srcs[IOAT_NUM_SRC_TEST + 1];
|
|
dma_addr_t dest_dma;
|
|
struct dma_async_tx_descriptor *tx;
|
|
struct dma_chan *dma_chan;
|
|
dma_cookie_t cookie;
|
|
u8 cmp_byte = 0;
|
|
u32 cmp_word;
|
|
u32 xor_val_result;
|
|
int err = 0;
|
|
struct completion cmp;
|
|
unsigned long tmo;
|
|
struct device *dev = &ioat_dma->pdev->dev;
|
|
struct dma_device *dma = &ioat_dma->dma_dev;
|
|
u8 op = 0;
|
|
|
|
dev_dbg(dev, "%s\n", __func__);
|
|
|
|
if (!dma_has_cap(DMA_XOR, dma->cap_mask))
|
|
return 0;
|
|
|
|
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
|
|
xor_srcs[src_idx] = alloc_page(GFP_KERNEL);
|
|
if (!xor_srcs[src_idx]) {
|
|
while (src_idx--)
|
|
__free_page(xor_srcs[src_idx]);
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
|
|
dest = alloc_page(GFP_KERNEL);
|
|
if (!dest) {
|
|
while (src_idx--)
|
|
__free_page(xor_srcs[src_idx]);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Fill in src buffers */
|
|
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++) {
|
|
u8 *ptr = page_address(xor_srcs[src_idx]);
|
|
|
|
for (i = 0; i < PAGE_SIZE; i++)
|
|
ptr[i] = (1 << src_idx);
|
|
}
|
|
|
|
for (src_idx = 0; src_idx < IOAT_NUM_SRC_TEST; src_idx++)
|
|
cmp_byte ^= (u8) (1 << src_idx);
|
|
|
|
cmp_word = (cmp_byte << 24) | (cmp_byte << 16) |
|
|
(cmp_byte << 8) | cmp_byte;
|
|
|
|
memset(page_address(dest), 0, PAGE_SIZE);
|
|
|
|
dma_chan = container_of(dma->channels.next, struct dma_chan,
|
|
device_node);
|
|
if (dma->device_alloc_chan_resources(dma_chan) < 1) {
|
|
err = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
/* test xor */
|
|
op = IOAT_OP_XOR;
|
|
|
|
dest_dma = dma_map_page(dev, dest, 0, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(dev, dest_dma)) {
|
|
err = -ENOMEM;
|
|
goto free_resources;
|
|
}
|
|
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST; i++) {
|
|
dma_srcs[i] = dma_map_page(dev, xor_srcs[i], 0, PAGE_SIZE,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev, dma_srcs[i])) {
|
|
err = -ENOMEM;
|
|
goto dma_unmap;
|
|
}
|
|
}
|
|
tx = dma->device_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
|
|
IOAT_NUM_SRC_TEST, PAGE_SIZE,
|
|
DMA_PREP_INTERRUPT);
|
|
|
|
if (!tx) {
|
|
dev_err(dev, "Self-test xor prep failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
async_tx_ack(tx);
|
|
init_completion(&cmp);
|
|
tx->callback = ioat_dma_test_callback;
|
|
tx->callback_param = &cmp;
|
|
cookie = tx->tx_submit(tx);
|
|
if (cookie < 0) {
|
|
dev_err(dev, "Self-test xor setup failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
dma->device_issue_pending(dma_chan);
|
|
|
|
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
|
|
|
|
if (tmo == 0 ||
|
|
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
|
|
dev_err(dev, "Self-test xor timed out\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
|
|
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
|
|
|
|
dma_sync_single_for_cpu(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
for (i = 0; i < (PAGE_SIZE / sizeof(u32)); i++) {
|
|
u32 *ptr = page_address(dest);
|
|
|
|
if (ptr[i] != cmp_word) {
|
|
dev_err(dev, "Self-test xor failed compare\n");
|
|
err = -ENODEV;
|
|
goto free_resources;
|
|
}
|
|
}
|
|
dma_sync_single_for_device(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
|
|
dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
|
|
/* skip validate if the capability is not present */
|
|
if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask))
|
|
goto free_resources;
|
|
|
|
op = IOAT_OP_XOR_VAL;
|
|
|
|
/* validate the sources with the destintation page */
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
|
|
xor_val_srcs[i] = xor_srcs[i];
|
|
xor_val_srcs[i] = dest;
|
|
|
|
xor_val_result = 1;
|
|
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
|
|
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev, dma_srcs[i])) {
|
|
err = -ENOMEM;
|
|
goto dma_unmap;
|
|
}
|
|
}
|
|
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
|
|
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
|
|
&xor_val_result, DMA_PREP_INTERRUPT);
|
|
if (!tx) {
|
|
dev_err(dev, "Self-test zero prep failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
async_tx_ack(tx);
|
|
init_completion(&cmp);
|
|
tx->callback = ioat_dma_test_callback;
|
|
tx->callback_param = &cmp;
|
|
cookie = tx->tx_submit(tx);
|
|
if (cookie < 0) {
|
|
dev_err(dev, "Self-test zero setup failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
dma->device_issue_pending(dma_chan);
|
|
|
|
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
|
|
|
|
if (tmo == 0 ||
|
|
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
|
|
dev_err(dev, "Self-test validate timed out\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
|
|
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
|
|
|
|
if (xor_val_result != 0) {
|
|
dev_err(dev, "Self-test validate failed compare\n");
|
|
err = -ENODEV;
|
|
goto free_resources;
|
|
}
|
|
|
|
memset(page_address(dest), 0, PAGE_SIZE);
|
|
|
|
/* test for non-zero parity sum */
|
|
op = IOAT_OP_XOR_VAL;
|
|
|
|
xor_val_result = 0;
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++) {
|
|
dma_srcs[i] = dma_map_page(dev, xor_val_srcs[i], 0, PAGE_SIZE,
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev, dma_srcs[i])) {
|
|
err = -ENOMEM;
|
|
goto dma_unmap;
|
|
}
|
|
}
|
|
tx = dma->device_prep_dma_xor_val(dma_chan, dma_srcs,
|
|
IOAT_NUM_SRC_TEST + 1, PAGE_SIZE,
|
|
&xor_val_result, DMA_PREP_INTERRUPT);
|
|
if (!tx) {
|
|
dev_err(dev, "Self-test 2nd zero prep failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
async_tx_ack(tx);
|
|
init_completion(&cmp);
|
|
tx->callback = ioat_dma_test_callback;
|
|
tx->callback_param = &cmp;
|
|
cookie = tx->tx_submit(tx);
|
|
if (cookie < 0) {
|
|
dev_err(dev, "Self-test 2nd zero setup failed\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
dma->device_issue_pending(dma_chan);
|
|
|
|
tmo = wait_for_completion_timeout(&cmp, msecs_to_jiffies(3000));
|
|
|
|
if (tmo == 0 ||
|
|
dma->device_tx_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
|
|
dev_err(dev, "Self-test 2nd validate timed out\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
if (xor_val_result != SUM_CHECK_P_RESULT) {
|
|
dev_err(dev, "Self-test validate failed compare\n");
|
|
err = -ENODEV;
|
|
goto dma_unmap;
|
|
}
|
|
|
|
for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
|
|
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE, DMA_TO_DEVICE);
|
|
|
|
goto free_resources;
|
|
dma_unmap:
|
|
if (op == IOAT_OP_XOR) {
|
|
while (--i >= 0)
|
|
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
|
|
DMA_TO_DEVICE);
|
|
dma_unmap_page(dev, dest_dma, PAGE_SIZE, DMA_FROM_DEVICE);
|
|
} else if (op == IOAT_OP_XOR_VAL) {
|
|
while (--i >= 0)
|
|
dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
|
|
DMA_TO_DEVICE);
|
|
}
|
|
free_resources:
|
|
dma->device_free_chan_resources(dma_chan);
|
|
out:
|
|
src_idx = IOAT_NUM_SRC_TEST;
|
|
while (src_idx--)
|
|
__free_page(xor_srcs[src_idx]);
|
|
__free_page(dest);
|
|
return err;
|
|
}
|
|
|
|
static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma)
|
|
{
|
|
int rc;
|
|
|
|
rc = ioat_dma_self_test(ioat_dma);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = ioat_xor_val_self_test(ioat_dma);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void ioat_intr_quirk(struct ioatdma_device *ioat_dma)
|
|
{
|
|
struct dma_device *dma;
|
|
struct dma_chan *c;
|
|
struct ioatdma_chan *ioat_chan;
|
|
u32 errmask;
|
|
|
|
dma = &ioat_dma->dma_dev;
|
|
|
|
/*
|
|
* if we have descriptor write back error status, we mask the
|
|
* error interrupts
|
|
*/
|
|
if (ioat_dma->cap & IOAT_CAP_DWBES) {
|
|
list_for_each_entry(c, &dma->channels, device_node) {
|
|
ioat_chan = to_ioat_chan(c);
|
|
errmask = readl(ioat_chan->reg_base +
|
|
IOAT_CHANERR_MASK_OFFSET);
|
|
errmask |= IOAT_CHANERR_XOR_P_OR_CRC_ERR |
|
|
IOAT_CHANERR_XOR_Q_ERR;
|
|
writel(errmask, ioat_chan->reg_base +
|
|
IOAT_CHANERR_MASK_OFFSET);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca)
|
|
{
|
|
struct pci_dev *pdev = ioat_dma->pdev;
|
|
int dca_en = system_has_dca_enabled(pdev);
|
|
struct dma_device *dma;
|
|
struct dma_chan *c;
|
|
struct ioatdma_chan *ioat_chan;
|
|
int err;
|
|
u16 val16;
|
|
|
|
dma = &ioat_dma->dma_dev;
|
|
dma->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock;
|
|
dma->device_issue_pending = ioat_issue_pending;
|
|
dma->device_alloc_chan_resources = ioat_alloc_chan_resources;
|
|
dma->device_free_chan_resources = ioat_free_chan_resources;
|
|
|
|
dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
|
|
dma->device_prep_dma_interrupt = ioat_prep_interrupt_lock;
|
|
|
|
ioat_dma->cap = readl(ioat_dma->reg_base + IOAT_DMA_CAP_OFFSET);
|
|
|
|
if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev))
|
|
ioat_dma->cap &=
|
|
~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS);
|
|
|
|
/* dca is incompatible with raid operations */
|
|
if (dca_en && (ioat_dma->cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
|
|
ioat_dma->cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
|
|
|
|
if (ioat_dma->cap & IOAT_CAP_XOR) {
|
|
dma->max_xor = 8;
|
|
|
|
dma_cap_set(DMA_XOR, dma->cap_mask);
|
|
dma->device_prep_dma_xor = ioat_prep_xor;
|
|
|
|
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
|
|
dma->device_prep_dma_xor_val = ioat_prep_xor_val;
|
|
}
|
|
|
|
if (ioat_dma->cap & IOAT_CAP_PQ) {
|
|
|
|
dma->device_prep_dma_pq = ioat_prep_pq;
|
|
dma->device_prep_dma_pq_val = ioat_prep_pq_val;
|
|
dma_cap_set(DMA_PQ, dma->cap_mask);
|
|
dma_cap_set(DMA_PQ_VAL, dma->cap_mask);
|
|
|
|
if (ioat_dma->cap & IOAT_CAP_RAID16SS)
|
|
dma_set_maxpq(dma, 16, 0);
|
|
else
|
|
dma_set_maxpq(dma, 8, 0);
|
|
|
|
if (!(ioat_dma->cap & IOAT_CAP_XOR)) {
|
|
dma->device_prep_dma_xor = ioat_prep_pqxor;
|
|
dma->device_prep_dma_xor_val = ioat_prep_pqxor_val;
|
|
dma_cap_set(DMA_XOR, dma->cap_mask);
|
|
dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
|
|
|
|
if (ioat_dma->cap & IOAT_CAP_RAID16SS)
|
|
dma->max_xor = 16;
|
|
else
|
|
dma->max_xor = 8;
|
|
}
|
|
}
|
|
|
|
dma->device_tx_status = ioat_tx_status;
|
|
|
|
/* starting with CB3.3 super extended descriptors are supported */
|
|
if (ioat_dma->cap & IOAT_CAP_RAID16SS) {
|
|
char pool_name[14];
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_SED_POOLS; i++) {
|
|
snprintf(pool_name, 14, "ioat_hw%d_sed", i);
|
|
|
|
/* allocate SED DMA pool */
|
|
ioat_dma->sed_hw_pool[i] = dmam_pool_create(pool_name,
|
|
&pdev->dev,
|
|
SED_SIZE * (i + 1), 64, 0);
|
|
if (!ioat_dma->sed_hw_pool[i])
|
|
return -ENOMEM;
|
|
|
|
}
|
|
}
|
|
|
|
if (!(ioat_dma->cap & (IOAT_CAP_XOR | IOAT_CAP_PQ)))
|
|
dma_cap_set(DMA_PRIVATE, dma->cap_mask);
|
|
|
|
err = ioat_probe(ioat_dma);
|
|
if (err)
|
|
return err;
|
|
|
|
list_for_each_entry(c, &dma->channels, device_node) {
|
|
ioat_chan = to_ioat_chan(c);
|
|
writel(IOAT_DMA_DCA_ANY_CPU,
|
|
ioat_chan->reg_base + IOAT_DCACTRL_OFFSET);
|
|
}
|
|
|
|
err = dma_async_device_register(&ioat_dma->dma_dev);
|
|
if (err)
|
|
goto err_disable_interrupts;
|
|
|
|
ioat_kobject_add(ioat_dma, &ioat_ktype);
|
|
|
|
if (dca)
|
|
ioat_dma->dca = ioat_dca_init(pdev, ioat_dma->reg_base);
|
|
|
|
/* disable relaxed ordering */
|
|
err = pcie_capability_read_word(pdev, PCI_EXP_DEVCTL, &val16);
|
|
if (err) {
|
|
err = pcibios_err_to_errno(err);
|
|
goto err_disable_interrupts;
|
|
}
|
|
|
|
/* clear relaxed ordering enable */
|
|
val16 &= ~PCI_EXP_DEVCTL_RELAX_EN;
|
|
err = pcie_capability_write_word(pdev, PCI_EXP_DEVCTL, val16);
|
|
if (err) {
|
|
err = pcibios_err_to_errno(err);
|
|
goto err_disable_interrupts;
|
|
}
|
|
|
|
if (ioat_dma->cap & IOAT_CAP_DPS)
|
|
writeb(ioat_pending_level + 1,
|
|
ioat_dma->reg_base + IOAT_PREFETCH_LIMIT_OFFSET);
|
|
|
|
return 0;
|
|
|
|
err_disable_interrupts:
|
|
ioat_disable_interrupts(ioat_dma);
|
|
dma_pool_destroy(ioat_dma->completion_pool);
|
|
return err;
|
|
}
|
|
|
|
static void ioat_shutdown(struct pci_dev *pdev)
|
|
{
|
|
struct ioatdma_device *ioat_dma = pci_get_drvdata(pdev);
|
|
struct ioatdma_chan *ioat_chan;
|
|
int i;
|
|
|
|
if (!ioat_dma)
|
|
return;
|
|
|
|
for (i = 0; i < IOAT_MAX_CHANS; i++) {
|
|
ioat_chan = ioat_dma->idx[i];
|
|
if (!ioat_chan)
|
|
continue;
|
|
|
|
spin_lock_bh(&ioat_chan->prep_lock);
|
|
set_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
|
|
spin_unlock_bh(&ioat_chan->prep_lock);
|
|
/*
|
|
* Synchronization rule for del_timer_sync():
|
|
* - The caller must not hold locks which would prevent
|
|
* completion of the timer's handler.
|
|
* So prep_lock cannot be held before calling it.
|
|
*/
|
|
del_timer_sync(&ioat_chan->timer);
|
|
|
|
/* this should quiesce then reset */
|
|
ioat_reset_hw(ioat_chan);
|
|
}
|
|
|
|
ioat_disable_interrupts(ioat_dma);
|
|
}
|
|
|
|
static void ioat_resume(struct ioatdma_device *ioat_dma)
|
|
{
|
|
struct ioatdma_chan *ioat_chan;
|
|
u32 chanerr;
|
|
int i;
|
|
|
|
for (i = 0; i < IOAT_MAX_CHANS; i++) {
|
|
ioat_chan = ioat_dma->idx[i];
|
|
if (!ioat_chan)
|
|
continue;
|
|
|
|
spin_lock_bh(&ioat_chan->prep_lock);
|
|
clear_bit(IOAT_CHAN_DOWN, &ioat_chan->state);
|
|
spin_unlock_bh(&ioat_chan->prep_lock);
|
|
|
|
chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
|
|
writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET);
|
|
|
|
/* no need to reset as shutdown already did that */
|
|
}
|
|
}
|
|
|
|
#define DRV_NAME "ioatdma"
|
|
|
|
static pci_ers_result_t ioat_pcie_error_detected(struct pci_dev *pdev,
|
|
pci_channel_state_t error)
|
|
{
|
|
dev_dbg(&pdev->dev, "%s: PCIe AER error %d\n", DRV_NAME, error);
|
|
|
|
/* quiesce and block I/O */
|
|
ioat_shutdown(pdev);
|
|
|
|
return PCI_ERS_RESULT_NEED_RESET;
|
|
}
|
|
|
|
static pci_ers_result_t ioat_pcie_error_slot_reset(struct pci_dev *pdev)
|
|
{
|
|
pci_ers_result_t result = PCI_ERS_RESULT_RECOVERED;
|
|
|
|
dev_dbg(&pdev->dev, "%s post reset handling\n", DRV_NAME);
|
|
|
|
if (pci_enable_device_mem(pdev) < 0) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to enable PCIe device after reset.\n");
|
|
result = PCI_ERS_RESULT_DISCONNECT;
|
|
} else {
|
|
pci_set_master(pdev);
|
|
pci_restore_state(pdev);
|
|
pci_save_state(pdev);
|
|
pci_wake_from_d3(pdev, false);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static void ioat_pcie_error_resume(struct pci_dev *pdev)
|
|
{
|
|
struct ioatdma_device *ioat_dma = pci_get_drvdata(pdev);
|
|
|
|
dev_dbg(&pdev->dev, "%s: AER handling resuming\n", DRV_NAME);
|
|
|
|
/* initialize and bring everything back */
|
|
ioat_resume(ioat_dma);
|
|
}
|
|
|
|
static const struct pci_error_handlers ioat_err_handler = {
|
|
.error_detected = ioat_pcie_error_detected,
|
|
.slot_reset = ioat_pcie_error_slot_reset,
|
|
.resume = ioat_pcie_error_resume,
|
|
};
|
|
|
|
static struct pci_driver ioat_pci_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = ioat_pci_tbl,
|
|
.probe = ioat_pci_probe,
|
|
.remove = ioat_remove,
|
|
.shutdown = ioat_shutdown,
|
|
.err_handler = &ioat_err_handler,
|
|
};
|
|
|
|
static void release_ioatdma(struct dma_device *device)
|
|
{
|
|
struct ioatdma_device *d = to_ioatdma_device(device);
|
|
int i;
|
|
|
|
for (i = 0; i < IOAT_MAX_CHANS; i++)
|
|
kfree(d->idx[i]);
|
|
|
|
dma_pool_destroy(d->completion_pool);
|
|
kfree(d);
|
|
}
|
|
|
|
static struct ioatdma_device *
|
|
alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
|
|
{
|
|
struct ioatdma_device *d = kzalloc(sizeof(*d), GFP_KERNEL);
|
|
|
|
if (!d)
|
|
return NULL;
|
|
d->pdev = pdev;
|
|
d->reg_base = iobase;
|
|
d->dma_dev.device_release = release_ioatdma;
|
|
return d;
|
|
}
|
|
|
|
static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
void __iomem * const *iomap;
|
|
struct device *dev = &pdev->dev;
|
|
struct ioatdma_device *device;
|
|
unsigned int i;
|
|
u8 version;
|
|
int err;
|
|
|
|
err = pcim_enable_device(pdev);
|
|
if (err)
|
|
return err;
|
|
|
|
err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
|
|
if (err)
|
|
return err;
|
|
iomap = pcim_iomap_table(pdev);
|
|
if (!iomap)
|
|
return -ENOMEM;
|
|
|
|
version = readb(iomap[IOAT_MMIO_BAR] + IOAT_VER_OFFSET);
|
|
if (version < IOAT_VER_3_0)
|
|
return -ENODEV;
|
|
|
|
err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
|
|
if (err)
|
|
return err;
|
|
|
|
device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
|
|
if (!device)
|
|
return -ENOMEM;
|
|
pci_set_master(pdev);
|
|
pci_set_drvdata(pdev, device);
|
|
|
|
device->version = version;
|
|
if (device->version >= IOAT_VER_3_4)
|
|
ioat_dca_enabled = 0;
|
|
|
|
if (is_skx_ioat(pdev))
|
|
device->version = IOAT_VER_3_2;
|
|
|
|
err = ioat3_dma_probe(device, ioat_dca_enabled);
|
|
if (err) {
|
|
for (i = 0; i < IOAT_MAX_CHANS; i++)
|
|
kfree(device->idx[i]);
|
|
kfree(device);
|
|
dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void ioat_remove(struct pci_dev *pdev)
|
|
{
|
|
struct ioatdma_device *device = pci_get_drvdata(pdev);
|
|
|
|
if (!device)
|
|
return;
|
|
|
|
ioat_shutdown(pdev);
|
|
|
|
dev_err(&pdev->dev, "Removing dma and dca services\n");
|
|
if (device->dca) {
|
|
unregister_dca_provider(device->dca, &pdev->dev);
|
|
free_dca_provider(device->dca);
|
|
device->dca = NULL;
|
|
}
|
|
|
|
ioat_dma_remove(device);
|
|
}
|
|
|
|
static int __init ioat_init_module(void)
|
|
{
|
|
int err = -ENOMEM;
|
|
|
|
pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
|
|
DRV_NAME, IOAT_DMA_VERSION);
|
|
|
|
ioat_cache = kmem_cache_create("ioat", sizeof(struct ioat_ring_ent),
|
|
0, SLAB_HWCACHE_ALIGN, NULL);
|
|
if (!ioat_cache)
|
|
return -ENOMEM;
|
|
|
|
ioat_sed_cache = KMEM_CACHE(ioat_sed_ent, 0);
|
|
if (!ioat_sed_cache)
|
|
goto err_ioat_cache;
|
|
|
|
err = pci_register_driver(&ioat_pci_driver);
|
|
if (err)
|
|
goto err_ioat3_cache;
|
|
|
|
return 0;
|
|
|
|
err_ioat3_cache:
|
|
kmem_cache_destroy(ioat_sed_cache);
|
|
|
|
err_ioat_cache:
|
|
kmem_cache_destroy(ioat_cache);
|
|
|
|
return err;
|
|
}
|
|
module_init(ioat_init_module);
|
|
|
|
static void __exit ioat_exit_module(void)
|
|
{
|
|
pci_unregister_driver(&ioat_pci_driver);
|
|
kmem_cache_destroy(ioat_sed_cache);
|
|
kmem_cache_destroy(ioat_cache);
|
|
}
|
|
module_exit(ioat_exit_module);
|