| /* |
| * Intel I/OAT DMA Linux driver |
| * Copyright(c) 2004 - 2015 Intel Corporation. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2, as published by the Free Software Foundation. |
| * |
| * 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. |
| * |
| * The full GNU General Public License is included in this distribution in |
| * the file called "COPYING". |
| * |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/pci.h> |
| #include <linux/interrupt.h> |
| #include <linux/dmaengine.h> |
| #include <linux/delay.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/workqueue.h> |
| #include <linux/prefetch.h> |
| #include <linux/dca.h> |
| #include <linux/aer.h> |
| #include <linux/sizes.h> |
| #include "dma.h" |
| #include "registers.h" |
| #include "hw.h" |
| |
| #include "../dmaengine.h" |
| |
| MODULE_VERSION(IOAT_DMA_VERSION); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| MODULE_AUTHOR("Intel Corporation"); |
| |
| static const struct pci_device_id ioat_pci_tbl[] = { |
| /* I/OAT v3 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) }, |
| |
| /* I/OAT v3.2 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDX9) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SKX) }, |
| |
| /* I/OAT v3.3 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) }, |
| |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) }, |
| |
| { 0, } |
| }; |
| MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
| |
| static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); |
| static void ioat_remove(struct pci_dev *pdev); |
| static void |
| ioat_init_channel(struct ioatdma_device *ioat_dma, |
| struct ioatdma_chan *ioat_chan, int idx); |
| static void ioat_intr_quirk(struct ioatdma_device *ioat_dma); |
| static int ioat_enumerate_channels(struct ioatdma_device *ioat_dma); |
| static int ioat3_dma_self_test(struct ioatdma_device *ioat_dma); |
| |
| static int ioat_dca_enabled = 1; |
| module_param(ioat_dca_enabled, int, 0644); |
| MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); |
| int ioat_pending_level = 4; |
| module_param(ioat_pending_level, int, 0644); |
| MODULE_PARM_DESC(ioat_pending_level, |
| "high-water mark for pushing ioat descriptors (default: 4)"); |
| static char ioat_interrupt_style[32] = "msix"; |
| module_param_string(ioat_interrupt_style, ioat_interrupt_style, |
| sizeof(ioat_interrupt_style), 0644); |
| MODULE_PARM_DESC(ioat_interrupt_style, |
| "set ioat interrupt style: msix (default), msi, intx"); |
| |
| struct kmem_cache *ioat_cache; |
| struct kmem_cache *ioat_sed_cache; |
| |
| static bool is_jf_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF0: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF1: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF2: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF3: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF4: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF5: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF6: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF7: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF8: |
| case PCI_DEVICE_ID_INTEL_IOAT_JSF9: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool is_snb_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB0: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB1: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB2: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB3: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB4: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB5: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB6: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB7: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB8: |
| case PCI_DEVICE_ID_INTEL_IOAT_SNB9: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool is_ivb_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB0: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB1: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB2: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB3: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB4: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB5: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB6: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB7: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB8: |
| case PCI_DEVICE_ID_INTEL_IOAT_IVB9: |
| return true; |
| default: |
| return false; |
| } |
| |
| } |
| |
| static bool is_hsw_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW0: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW1: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW2: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW3: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW4: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW5: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW6: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW7: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW8: |
| case PCI_DEVICE_ID_INTEL_IOAT_HSW9: |
| return true; |
| default: |
| return false; |
| } |
| |
| } |
| |
| static bool is_bdx_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX0: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX1: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX2: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX3: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX4: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX5: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX6: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX7: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX8: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDX9: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static inline bool is_skx_ioat(struct pci_dev *pdev) |
| { |
| return (pdev->device == PCI_DEVICE_ID_INTEL_IOAT_SKX) ? true : false; |
| } |
| |
| static bool is_xeon_cb32(struct pci_dev *pdev) |
| { |
| return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) || |
| is_hsw_ioat(pdev) || is_bdx_ioat(pdev) || is_skx_ioat(pdev); |
| } |
| |
| bool is_bwd_ioat(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD0: |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD1: |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD2: |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD3: |
| /* even though not Atom, BDX-DE has same DMA silicon */ |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static bool is_bwd_noraid(struct pci_dev *pdev) |
| { |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD2: |
| case PCI_DEVICE_ID_INTEL_IOAT_BWD3: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE0: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE1: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE2: |
| case PCI_DEVICE_ID_INTEL_IOAT_BDXDE3: |
| return true; |
| default: |
| return false; |
| } |
| |
| } |
| |
| /* |
| * Perform a IOAT transaction to verify the HW works. |
| */ |
| #define IOAT_TEST_SIZE 2000 |
| |
| static void ioat_dma_test_callback(void *dma_async_param) |
| { |
| struct completion *cmp = dma_async_param; |
| |
| complete(cmp); |
| } |
| |
| /** |
| * ioat_dma_self_test - Perform a IOAT transaction to verify the HW works. |
| * @ioat_dma: dma device to be tested |
| */ |
| static int ioat_dma_self_test(struct ioatdma_device *ioat_dma) |
| { |
| int i; |
| u8 *src; |
| u8 *dest; |
| struct dma_device *dma = &ioat_dma->dma_dev; |
| struct device *dev = &ioat_dma->pdev->dev; |
| struct dma_chan *dma_chan; |
| struct dma_async_tx_descriptor *tx; |
| dma_addr_t dma_dest, dma_src; |
| dma_cookie_t cookie; |
| int err = 0; |
| struct completion cmp; |
| unsigned long tmo; |
| unsigned long flags; |
| |
| src = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL); |
| if (!src) |
| return -ENOMEM; |
| dest = kzalloc(sizeof(u8) * IOAT_TEST_SIZE, GFP_KERNEL); |
| if (!dest) { |
| kfree(src); |
| return -ENOMEM; |
| } |
| |
| /* Fill in src buffer */ |
| for (i = 0; i < IOAT_TEST_SIZE; i++) |
| src[i] = (u8)i; |
| |
| /* Start copy, using first DMA channel */ |
| dma_chan = container_of(dma->channels.next, struct dma_chan, |
| device_node); |
| if (dma->device_alloc_chan_resources(dma_chan) < 1) { |
| dev_err(dev, "selftest cannot allocate chan resource\n"); |
| err = -ENODEV; |
| goto out; |
| } |
| |
| dma_src = dma_map_single(dev, src, IOAT_TEST_SIZE, DMA_TO_DEVICE); |
| if (dma_mapping_error(dev, dma_src)) { |
| dev_err(dev, "mapping src buffer failed\n"); |
| err = -ENOMEM; |
| goto free_resources; |
| } |
| dma_dest = dma_map_single(dev, dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE); |
| if (dma_mapping_error(dev, dma_dest)) { |
| dev_err(dev, "mapping dest buffer failed\n"); |
| err = -ENOMEM; |
| goto unmap_src; |
| } |
| flags = DMA_PREP_INTERRUPT; |
| tx = ioat_dma->dma_dev.device_prep_dma_memcpy(dma_chan, dma_dest, |
| dma_src, IOAT_TEST_SIZE, |
| flags); |
| if (!tx) { |
| dev_err(dev, "Self-test prep failed, disabling\n"); |
| err = -ENODEV; |
| goto unmap_dma; |
| } |
| |
| 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 setup failed, disabling\n"); |
| err = -ENODEV; |
| goto unmap_dma; |
| } |
| 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 copy timed out, disabling\n"); |
| err = -ENODEV; |
| goto unmap_dma; |
| } |
| if (memcmp(src, dest, IOAT_TEST_SIZE)) { |
| dev_err(dev, "Self-test copy failed compare, disabling\n"); |
| err = -ENODEV; |
| goto free_resources; |
| } |
| |
| unmap_dma: |
| dma_unmap_single(dev, dma_dest, IOAT_TEST_SIZE, DMA_FROM_DEVICE); |
| unmap_src: |
| dma_unmap_single(dev, dma_src, IOAT_TEST_SIZE, DMA_TO_DEVICE); |
| free_resources: |
| dma->device_free_chan_resources(dma_chan); |
| out: |
| kfree(src); |
| kfree(dest); |
| return err; |
| } |
| |
| /** |
| * ioat_dma_setup_interrupts - setup interrupt handler |
| * @ioat_dma: ioat dma device |
| */ |
| int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma) |
| { |
| struct ioatdma_chan *ioat_chan; |
| struct pci_dev *pdev = ioat_dma->pdev; |
| struct device *dev = &pdev->dev; |
| struct msix_entry *msix; |
| 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 int ioat_register(struct ioatdma_device *ioat_dma) |
| { |
| int err = dma_async_device_register(&ioat_dma->dma_dev); |
| |
| if (err) { |
| ioat_disable_interrupts(ioat_dma); |
| dma_pool_destroy(ioat_dma->completion_pool); |
| } |
| |
| 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); |
| |
| dma_pool_destroy(ioat_dma->completion_pool); |
| |
| INIT_LIST_HEAD(&dma->channels); |
| } |
| |
| /** |
| * ioat_enumerate_channels - find and initialize the device's channels |
| * @ioat_dma: the ioat dma device to be enumerated |
| */ |
| static int 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 0; |
| dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); |
| |
| for (i = 0; i < dma->chancnt; i++) { |
| ioat_chan = devm_kzalloc(dev, 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; |
| return i; |
| } |
| |
| /** |
| * ioat_free_chan_resources - release all the descriptors |
| * @chan: 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); |
| ioat_reset_hw(ioat_chan); |
| |
| 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), SZ_2M, |
| 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); |
| |
| 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; |
| struct dma_chan *c = &ioat_chan->dma_chan; |
| unsigned long data = (unsigned long) c; |
| |
| 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_init(&ioat_chan->cleanup_task, ioat_cleanup_event, data); |
| } |
| |
| #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 = ioat_register(ioat_dma); |
| if (err) |
| return err; |
| |
| 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, IOAT_DEVCTRL_OFFSET, &val16); |
| if (err) |
| return err; |
| |
| /* clear relaxed ordering enable */ |
| val16 &= ~IOAT_DEVCTRL_ROE; |
| err = pcie_capability_write_word(pdev, IOAT_DEVCTRL_OFFSET, val16); |
| if (err) |
| return err; |
| |
| return 0; |
| } |
| |
| 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); |
| del_timer_sync(&ioat_chan->timer); |
| spin_unlock_bh(&ioat_chan->prep_lock); |
| /* 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, |
| enum pci_channel_state 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; |
| int err; |
| |
| 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); |
| } |
| |
| err = pci_cleanup_aer_uncorrect_error_status(pdev); |
| if (err) { |
| dev_err(&pdev->dev, |
| "AER uncorrect error status clear failed: %#x\n", err); |
| } |
| |
| 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 struct ioatdma_device * |
| alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase) |
| { |
| struct device *dev = &pdev->dev; |
| struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); |
| |
| if (!d) |
| return NULL; |
| d->pdev = pdev; |
| d->reg_base = iobase; |
| 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; |
| 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; |
| |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (err) |
| err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| if (err) |
| return err; |
| |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); |
| if (err) |
| err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 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 = readb(device->reg_base + IOAT_VER_OFFSET); |
| if (device->version >= IOAT_VER_3_0) { |
| if (is_skx_ioat(pdev)) |
| device->version = IOAT_VER_3_2; |
| err = ioat3_dma_probe(device, ioat_dca_enabled); |
| |
| if (device->version >= IOAT_VER_3_3) |
| pci_enable_pcie_error_reporting(pdev); |
| } else |
| return -ENODEV; |
| |
| if (err) { |
| dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n"); |
| pci_disable_pcie_error_reporting(pdev); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static void ioat_remove(struct pci_dev *pdev) |
| { |
| struct ioatdma_device *device = pci_get_drvdata(pdev); |
| |
| if (!device) |
| return; |
| |
| 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; |
| } |
| |
| pci_disable_pcie_error_reporting(pdev); |
| 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_cache); |
| } |
| module_exit(ioat_exit_module); |