+++ /dev/null
-/*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2004 - 2009 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms 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".
- *
- * BSD LICENSE
- *
- * Copyright(c) 2004-2009 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-/*
- * Support routines for v3+ hardware
- */
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/gfp.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/prefetch.h>
-#include "../dmaengine.h"
-#include "registers.h"
-#include "hw.h"
-#include "dma.h"
-#include "dma_v2.h"
-
-extern struct kmem_cache *ioat3_sed_cache;
-
-/* ioat hardware assumes at least two sources for raid operations */
-#define src_cnt_to_sw(x) ((x) + 2)
-#define src_cnt_to_hw(x) ((x) - 2)
-#define ndest_to_sw(x) ((x) + 1)
-#define ndest_to_hw(x) ((x) - 1)
-#define src16_cnt_to_sw(x) ((x) + 9)
-#define src16_cnt_to_hw(x) ((x) - 9)
-
-/* provide a lookup table for setting the source address in the base or
- * extended descriptor of an xor or pq descriptor
- */
-static const u8 xor_idx_to_desc = 0xe0;
-static const u8 xor_idx_to_field[] = { 1, 4, 5, 6, 7, 0, 1, 2 };
-static const u8 pq_idx_to_desc = 0xf8;
-static const u8 pq16_idx_to_desc[] = { 0, 0, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2 };
-static const u8 pq_idx_to_field[] = { 1, 4, 5, 0, 1, 2, 4, 5 };
-static const u8 pq16_idx_to_field[] = { 1, 4, 1, 2, 3, 4, 5, 6, 7,
- 0, 1, 2, 3, 4, 5, 6 };
-
-static void ioat3_eh(struct ioat2_dma_chan *ioat);
-
-static void xor_set_src(struct ioat_raw_descriptor *descs[2],
- dma_addr_t addr, u32 offset, int idx)
-{
- struct ioat_raw_descriptor *raw = descs[xor_idx_to_desc >> idx & 1];
-
- raw->field[xor_idx_to_field[idx]] = addr + offset;
-}
-
-static dma_addr_t pq_get_src(struct ioat_raw_descriptor *descs[2], int idx)
-{
- struct ioat_raw_descriptor *raw = descs[pq_idx_to_desc >> idx & 1];
-
- return raw->field[pq_idx_to_field[idx]];
-}
-
-static dma_addr_t pq16_get_src(struct ioat_raw_descriptor *desc[3], int idx)
-{
- struct ioat_raw_descriptor *raw = desc[pq16_idx_to_desc[idx]];
-
- return raw->field[pq16_idx_to_field[idx]];
-}
-
-static void pq_set_src(struct ioat_raw_descriptor *descs[2],
- dma_addr_t addr, u32 offset, u8 coef, int idx)
-{
- struct ioat_pq_descriptor *pq = (struct ioat_pq_descriptor *) descs[0];
- struct ioat_raw_descriptor *raw = descs[pq_idx_to_desc >> idx & 1];
-
- raw->field[pq_idx_to_field[idx]] = addr + offset;
- pq->coef[idx] = coef;
-}
-
-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_xeon_cb32(struct pci_dev *pdev)
-{
- return is_jf_ioat(pdev) || is_snb_ioat(pdev) || is_ivb_ioat(pdev) ||
- is_hsw_ioat(pdev);
-}
-
-static 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;
- }
-
-}
-
-static void pq16_set_src(struct ioat_raw_descriptor *desc[3],
- dma_addr_t addr, u32 offset, u8 coef, unsigned idx)
-{
- struct ioat_pq_descriptor *pq = (struct ioat_pq_descriptor *)desc[0];
- struct ioat_pq16a_descriptor *pq16 =
- (struct ioat_pq16a_descriptor *)desc[1];
- struct ioat_raw_descriptor *raw = desc[pq16_idx_to_desc[idx]];
-
- raw->field[pq16_idx_to_field[idx]] = addr + offset;
-
- if (idx < 8)
- pq->coef[idx] = coef;
- else
- pq16->coef[idx - 8] = coef;
-}
-
-static struct ioat_sed_ent *
-ioat3_alloc_sed(struct ioatdma_device *device, unsigned int hw_pool)
-{
- struct ioat_sed_ent *sed;
- gfp_t flags = __GFP_ZERO | GFP_ATOMIC;
-
- sed = kmem_cache_alloc(ioat3_sed_cache, flags);
- if (!sed)
- return NULL;
-
- sed->hw_pool = hw_pool;
- sed->hw = dma_pool_alloc(device->sed_hw_pool[hw_pool],
- flags, &sed->dma);
- if (!sed->hw) {
- kmem_cache_free(ioat3_sed_cache, sed);
- return NULL;
- }
-
- return sed;
-}
-
-static void ioat3_free_sed(struct ioatdma_device *device, struct ioat_sed_ent *sed)
-{
- if (!sed)
- return;
-
- dma_pool_free(device->sed_hw_pool[sed->hw_pool], sed->hw, sed->dma);
- kmem_cache_free(ioat3_sed_cache, sed);
-}
-
-static bool desc_has_ext(struct ioat_ring_ent *desc)
-{
- struct ioat_dma_descriptor *hw = desc->hw;
-
- if (hw->ctl_f.op == IOAT_OP_XOR ||
- hw->ctl_f.op == IOAT_OP_XOR_VAL) {
- struct ioat_xor_descriptor *xor = desc->xor;
-
- if (src_cnt_to_sw(xor->ctl_f.src_cnt) > 5)
- return true;
- } else if (hw->ctl_f.op == IOAT_OP_PQ ||
- hw->ctl_f.op == IOAT_OP_PQ_VAL) {
- struct ioat_pq_descriptor *pq = desc->pq;
-
- if (src_cnt_to_sw(pq->ctl_f.src_cnt) > 3)
- return true;
- }
-
- return false;
-}
-
-static u64 ioat3_get_current_completion(struct ioat_chan_common *chan)
-{
- u64 phys_complete;
- u64 completion;
-
- completion = *chan->completion;
- phys_complete = ioat_chansts_to_addr(completion);
-
- dev_dbg(to_dev(chan), "%s: phys_complete: %#llx\n", __func__,
- (unsigned long long) phys_complete);
-
- return phys_complete;
-}
-
-static bool ioat3_cleanup_preamble(struct ioat_chan_common *chan,
- u64 *phys_complete)
-{
- *phys_complete = ioat3_get_current_completion(chan);
- if (*phys_complete == chan->last_completion)
- return false;
-
- clear_bit(IOAT_COMPLETION_ACK, &chan->state);
- mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
-
- return true;
-}
-
-static void
-desc_get_errstat(struct ioat2_dma_chan *ioat, struct ioat_ring_ent *desc)
-{
- struct ioat_dma_descriptor *hw = desc->hw;
-
- switch (hw->ctl_f.op) {
- case IOAT_OP_PQ_VAL:
- case IOAT_OP_PQ_VAL_16S:
- {
- struct ioat_pq_descriptor *pq = desc->pq;
-
- /* check if there's error written */
- if (!pq->dwbes_f.wbes)
- return;
-
- /* need to set a chanerr var for checking to clear later */
-
- if (pq->dwbes_f.p_val_err)
- *desc->result |= SUM_CHECK_P_RESULT;
-
- if (pq->dwbes_f.q_val_err)
- *desc->result |= SUM_CHECK_Q_RESULT;
-
- return;
- }
- default:
- return;
- }
-}
-
-/**
- * __cleanup - reclaim used descriptors
- * @ioat: channel (ring) to clean
- *
- * The difference from the dma_v2.c __cleanup() is that this routine
- * handles extended descriptors and dma-unmapping raid operations.
- */
-static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete)
-{
- struct ioat_chan_common *chan = &ioat->base;
- struct ioatdma_device *device = chan->device;
- struct ioat_ring_ent *desc;
- bool seen_current = false;
- int idx = ioat->tail, i;
- u16 active;
-
- dev_dbg(to_dev(chan), "%s: head: %#x tail: %#x issued: %#x\n",
- __func__, ioat->head, ioat->tail, ioat->issued);
-
- /*
- * At restart of the channel, the completion address and the
- * channel status will be 0 due to starting a new chain. Since
- * it's new chain and the first descriptor "fails", there is
- * nothing to clean up. We do not want to reap the entire submitted
- * chain due to this 0 address value and then BUG.
- */
- if (!phys_complete)
- return;
-
- active = ioat2_ring_active(ioat);
- for (i = 0; i < active && !seen_current; i++) {
- struct dma_async_tx_descriptor *tx;
-
- smp_read_barrier_depends();
- prefetch(ioat2_get_ring_ent(ioat, idx + i + 1));
- desc = ioat2_get_ring_ent(ioat, idx + i);
- dump_desc_dbg(ioat, desc);
-
- /* set err stat if we are using dwbes */
- if (device->cap & IOAT_CAP_DWBES)
- desc_get_errstat(ioat, desc);
-
- tx = &desc->txd;
- if (tx->cookie) {
- dma_cookie_complete(tx);
- dma_descriptor_unmap(tx);
- if (tx->callback) {
- tx->callback(tx->callback_param);
- tx->callback = NULL;
- }
- }
-
- if (tx->phys == phys_complete)
- seen_current = true;
-
- /* skip extended descriptors */
- if (desc_has_ext(desc)) {
- BUG_ON(i + 1 >= active);
- i++;
- }
-
- /* cleanup super extended descriptors */
- if (desc->sed) {
- ioat3_free_sed(device, desc->sed);
- desc->sed = NULL;
- }
- }
- smp_mb(); /* finish all descriptor reads before incrementing tail */
- ioat->tail = idx + i;
- BUG_ON(active && !seen_current); /* no active descs have written a completion? */
- chan->last_completion = phys_complete;
-
- if (active - i == 0) {
- dev_dbg(to_dev(chan), "%s: cancel completion timeout\n",
- __func__);
- clear_bit(IOAT_COMPLETION_PENDING, &chan->state);
- mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
- }
- /* 5 microsecond delay per pending descriptor */
- writew(min((5 * (active - i)), IOAT_INTRDELAY_MASK),
- chan->device->reg_base + IOAT_INTRDELAY_OFFSET);
-}
-
-static void ioat3_cleanup(struct ioat2_dma_chan *ioat)
-{
- struct ioat_chan_common *chan = &ioat->base;
- u64 phys_complete;
-
- spin_lock_bh(&chan->cleanup_lock);
-
- if (ioat3_cleanup_preamble(chan, &phys_complete))
- __cleanup(ioat, phys_complete);
-
- if (is_ioat_halted(*chan->completion)) {
- u32 chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
-
- if (chanerr & IOAT_CHANERR_HANDLE_MASK) {
- mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
- ioat3_eh(ioat);
- }
- }
-
- spin_unlock_bh(&chan->cleanup_lock);
-}
-
-static void ioat3_cleanup_event(unsigned long data)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
- struct ioat_chan_common *chan = &ioat->base;
-
- ioat3_cleanup(ioat);
- if (!test_bit(IOAT_RUN, &chan->state))
- return;
- writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET);
-}
-
-static void ioat3_restart_channel(struct ioat2_dma_chan *ioat)
-{
- struct ioat_chan_common *chan = &ioat->base;
- u64 phys_complete;
-
- ioat2_quiesce(chan, 0);
- if (ioat3_cleanup_preamble(chan, &phys_complete))
- __cleanup(ioat, phys_complete);
-
- __ioat2_restart_chan(ioat);
-}
-
-static void ioat3_eh(struct ioat2_dma_chan *ioat)
-{
- struct ioat_chan_common *chan = &ioat->base;
- struct pci_dev *pdev = to_pdev(chan);
- struct ioat_dma_descriptor *hw;
- struct dma_async_tx_descriptor *tx;
- u64 phys_complete;
- struct ioat_ring_ent *desc;
- u32 err_handled = 0;
- u32 chanerr_int;
- u32 chanerr;
-
- /* cleanup so tail points to descriptor that caused the error */
- if (ioat3_cleanup_preamble(chan, &phys_complete))
- __cleanup(ioat, phys_complete);
-
- chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
- pci_read_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, &chanerr_int);
-
- dev_dbg(to_dev(chan), "%s: error = %x:%x\n",
- __func__, chanerr, chanerr_int);
-
- desc = ioat2_get_ring_ent(ioat, ioat->tail);
- hw = desc->hw;
- dump_desc_dbg(ioat, desc);
-
- switch (hw->ctl_f.op) {
- case IOAT_OP_XOR_VAL:
- if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) {
- *desc->result |= SUM_CHECK_P_RESULT;
- err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR;
- }
- break;
- case IOAT_OP_PQ_VAL:
- case IOAT_OP_PQ_VAL_16S:
- if (chanerr & IOAT_CHANERR_XOR_P_OR_CRC_ERR) {
- *desc->result |= SUM_CHECK_P_RESULT;
- err_handled |= IOAT_CHANERR_XOR_P_OR_CRC_ERR;
- }
- if (chanerr & IOAT_CHANERR_XOR_Q_ERR) {
- *desc->result |= SUM_CHECK_Q_RESULT;
- err_handled |= IOAT_CHANERR_XOR_Q_ERR;
- }
- break;
- }
-
- /* fault on unhandled error or spurious halt */
- if (chanerr ^ err_handled || chanerr == 0) {
- dev_err(to_dev(chan), "%s: fatal error (%x:%x)\n",
- __func__, chanerr, err_handled);
- BUG();
- } else { /* cleanup the faulty descriptor */
- tx = &desc->txd;
- if (tx->cookie) {
- dma_cookie_complete(tx);
- dma_descriptor_unmap(tx);
- if (tx->callback) {
- tx->callback(tx->callback_param);
- tx->callback = NULL;
- }
- }
- }
-
- writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET);
- pci_write_config_dword(pdev, IOAT_PCI_CHANERR_INT_OFFSET, chanerr_int);
-
- /* mark faulting descriptor as complete */
- *chan->completion = desc->txd.phys;
-
- spin_lock_bh(&ioat->prep_lock);
- ioat3_restart_channel(ioat);
- spin_unlock_bh(&ioat->prep_lock);
-}
-
-static void check_active(struct ioat2_dma_chan *ioat)
-{
- struct ioat_chan_common *chan = &ioat->base;
-
- if (ioat2_ring_active(ioat)) {
- mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
- return;
- }
-
- if (test_and_clear_bit(IOAT_CHAN_ACTIVE, &chan->state))
- mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
- else if (ioat->alloc_order > ioat_get_alloc_order()) {
- /* if the ring is idle, empty, and oversized try to step
- * down the size
- */
- reshape_ring(ioat, ioat->alloc_order - 1);
-
- /* keep shrinking until we get back to our minimum
- * default size
- */
- if (ioat->alloc_order > ioat_get_alloc_order())
- mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT);
- }
-
-}
-
-static void ioat3_timer_event(unsigned long data)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data);
- struct ioat_chan_common *chan = &ioat->base;
- dma_addr_t phys_complete;
- u64 status;
-
- status = ioat_chansts(chan);
-
- /* when halted due to errors check for channel
- * programming errors before advancing the completion state
- */
- if (is_ioat_halted(status)) {
- u32 chanerr;
-
- chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
- dev_err(to_dev(chan), "%s: Channel halted (%x)\n",
- __func__, chanerr);
- if (test_bit(IOAT_RUN, &chan->state))
- BUG_ON(is_ioat_bug(chanerr));
- else /* we never got off the ground */
- return;
- }
-
- /* if we haven't made progress and we have already
- * acknowledged a pending completion once, then be more
- * forceful with a restart
- */
- spin_lock_bh(&chan->cleanup_lock);
- if (ioat_cleanup_preamble(chan, &phys_complete))
- __cleanup(ioat, phys_complete);
- else if (test_bit(IOAT_COMPLETION_ACK, &chan->state)) {
- spin_lock_bh(&ioat->prep_lock);
- ioat3_restart_channel(ioat);
- spin_unlock_bh(&ioat->prep_lock);
- spin_unlock_bh(&chan->cleanup_lock);
- return;
- } else {
- set_bit(IOAT_COMPLETION_ACK, &chan->state);
- mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
- }
-
-
- if (ioat2_ring_active(ioat))
- mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT);
- else {
- spin_lock_bh(&ioat->prep_lock);
- check_active(ioat);
- spin_unlock_bh(&ioat->prep_lock);
- }
- spin_unlock_bh(&chan->cleanup_lock);
-}
-
-static enum dma_status
-ioat3_tx_status(struct dma_chan *c, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
- enum dma_status ret;
-
- ret = dma_cookie_status(c, cookie, txstate);
- if (ret == DMA_COMPLETE)
- return ret;
-
- ioat3_cleanup(ioat);
-
- return dma_cookie_status(c, cookie, txstate);
-}
-
-static struct dma_async_tx_descriptor *
-__ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result,
- dma_addr_t dest, dma_addr_t *src, unsigned int src_cnt,
- size_t len, unsigned long flags)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
- struct ioat_ring_ent *compl_desc;
- struct ioat_ring_ent *desc;
- struct ioat_ring_ent *ext;
- size_t total_len = len;
- struct ioat_xor_descriptor *xor;
- struct ioat_xor_ext_descriptor *xor_ex = NULL;
- struct ioat_dma_descriptor *hw;
- int num_descs, with_ext, idx, i;
- u32 offset = 0;
- u8 op = result ? IOAT_OP_XOR_VAL : IOAT_OP_XOR;
-
- BUG_ON(src_cnt < 2);
-
- num_descs = ioat2_xferlen_to_descs(ioat, len);
- /* we need 2x the number of descriptors to cover greater than 5
- * sources
- */
- if (src_cnt > 5) {
- with_ext = 1;
- num_descs *= 2;
- } else
- with_ext = 0;
-
- /* completion writes from the raid engine may pass completion
- * writes from the legacy engine, so we need one extra null
- * (legacy) descriptor to ensure all completion writes arrive in
- * order.
- */
- if (likely(num_descs) && ioat2_check_space_lock(ioat, num_descs+1) == 0)
- idx = ioat->head;
- else
- return NULL;
- i = 0;
- do {
- struct ioat_raw_descriptor *descs[2];
- size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
- int s;
-
- desc = ioat2_get_ring_ent(ioat, idx + i);
- xor = desc->xor;
-
- /* save a branch by unconditionally retrieving the
- * extended descriptor xor_set_src() knows to not write
- * to it in the single descriptor case
- */
- ext = ioat2_get_ring_ent(ioat, idx + i + 1);
- xor_ex = ext->xor_ex;
-
- descs[0] = (struct ioat_raw_descriptor *) xor;
- descs[1] = (struct ioat_raw_descriptor *) xor_ex;
- for (s = 0; s < src_cnt; s++)
- xor_set_src(descs, src[s], offset, s);
- xor->size = xfer_size;
- xor->dst_addr = dest + offset;
- xor->ctl = 0;
- xor->ctl_f.op = op;
- xor->ctl_f.src_cnt = src_cnt_to_hw(src_cnt);
-
- len -= xfer_size;
- offset += xfer_size;
- dump_desc_dbg(ioat, desc);
- } while ((i += 1 + with_ext) < num_descs);
-
- /* last xor descriptor carries the unmap parameters and fence bit */
- desc->txd.flags = flags;
- desc->len = total_len;
- if (result)
- desc->result = result;
- xor->ctl_f.fence = !!(flags & DMA_PREP_FENCE);
-
- /* completion descriptor carries interrupt bit */
- compl_desc = ioat2_get_ring_ent(ioat, idx + i);
- compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT;
- hw = compl_desc->hw;
- hw->ctl = 0;
- hw->ctl_f.null = 1;
- hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT);
- hw->ctl_f.compl_write = 1;
- hw->size = NULL_DESC_BUFFER_SIZE;
- dump_desc_dbg(ioat, compl_desc);
-
- /* we leave the channel locked to ensure in order submission */
- return &compl_desc->txd;
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_xor(struct dma_chan *chan, dma_addr_t dest, dma_addr_t *src,
- unsigned int src_cnt, size_t len, unsigned long flags)
-{
- return __ioat3_prep_xor_lock(chan, NULL, dest, src, src_cnt, len, flags);
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_xor_val(struct dma_chan *chan, dma_addr_t *src,
- unsigned int src_cnt, size_t len,
- enum sum_check_flags *result, unsigned long flags)
-{
- /* the cleanup routine only sets bits on validate failure, it
- * does not clear bits on validate success... so clear it here
- */
- *result = 0;
-
- return __ioat3_prep_xor_lock(chan, result, src[0], &src[1],
- src_cnt - 1, len, flags);
-}
-
-static void
-dump_pq_desc_dbg(struct ioat2_dma_chan *ioat, struct ioat_ring_ent *desc, struct ioat_ring_ent *ext)
-{
- struct device *dev = to_dev(&ioat->base);
- struct ioat_pq_descriptor *pq = desc->pq;
- struct ioat_pq_ext_descriptor *pq_ex = ext ? ext->pq_ex : NULL;
- struct ioat_raw_descriptor *descs[] = { (void *) pq, (void *) pq_ex };
- int src_cnt = src_cnt_to_sw(pq->ctl_f.src_cnt);
- int i;
-
- dev_dbg(dev, "desc[%d]: (%#llx->%#llx) flags: %#x"
- " sz: %#10.8x ctl: %#x (op: %#x int: %d compl: %d pq: '%s%s'"
- " src_cnt: %d)\n",
- desc_id(desc), (unsigned long long) desc->txd.phys,
- (unsigned long long) (pq_ex ? pq_ex->next : pq->next),
- desc->txd.flags, pq->size, pq->ctl, pq->ctl_f.op, pq->ctl_f.int_en,
- pq->ctl_f.compl_write,
- pq->ctl_f.p_disable ? "" : "p", pq->ctl_f.q_disable ? "" : "q",
- pq->ctl_f.src_cnt);
- for (i = 0; i < src_cnt; i++)
- dev_dbg(dev, "\tsrc[%d]: %#llx coef: %#x\n", i,
- (unsigned long long) pq_get_src(descs, i), pq->coef[i]);
- dev_dbg(dev, "\tP: %#llx\n", pq->p_addr);
- dev_dbg(dev, "\tQ: %#llx\n", pq->q_addr);
- dev_dbg(dev, "\tNEXT: %#llx\n", pq->next);
-}
-
-static void dump_pq16_desc_dbg(struct ioat2_dma_chan *ioat,
- struct ioat_ring_ent *desc)
-{
- struct device *dev = to_dev(&ioat->base);
- struct ioat_pq_descriptor *pq = desc->pq;
- struct ioat_raw_descriptor *descs[] = { (void *)pq,
- (void *)pq,
- (void *)pq };
- int src_cnt = src16_cnt_to_sw(pq->ctl_f.src_cnt);
- int i;
-
- if (desc->sed) {
- descs[1] = (void *)desc->sed->hw;
- descs[2] = (void *)desc->sed->hw + 64;
- }
-
- dev_dbg(dev, "desc[%d]: (%#llx->%#llx) flags: %#x"
- " sz: %#x ctl: %#x (op: %#x int: %d compl: %d pq: '%s%s'"
- " src_cnt: %d)\n",
- desc_id(desc), (unsigned long long) desc->txd.phys,
- (unsigned long long) pq->next,
- desc->txd.flags, pq->size, pq->ctl,
- pq->ctl_f.op, pq->ctl_f.int_en,
- pq->ctl_f.compl_write,
- pq->ctl_f.p_disable ? "" : "p", pq->ctl_f.q_disable ? "" : "q",
- pq->ctl_f.src_cnt);
- for (i = 0; i < src_cnt; i++) {
- dev_dbg(dev, "\tsrc[%d]: %#llx coef: %#x\n", i,
- (unsigned long long) pq16_get_src(descs, i),
- pq->coef[i]);
- }
- dev_dbg(dev, "\tP: %#llx\n", pq->p_addr);
- dev_dbg(dev, "\tQ: %#llx\n", pq->q_addr);
-}
-
-static struct dma_async_tx_descriptor *
-__ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result,
- const dma_addr_t *dst, const dma_addr_t *src,
- unsigned int src_cnt, const unsigned char *scf,
- size_t len, unsigned long flags)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
- struct ioat_chan_common *chan = &ioat->base;
- struct ioatdma_device *device = chan->device;
- struct ioat_ring_ent *compl_desc;
- struct ioat_ring_ent *desc;
- struct ioat_ring_ent *ext;
- size_t total_len = len;
- struct ioat_pq_descriptor *pq;
- struct ioat_pq_ext_descriptor *pq_ex = NULL;
- struct ioat_dma_descriptor *hw;
- u32 offset = 0;
- u8 op = result ? IOAT_OP_PQ_VAL : IOAT_OP_PQ;
- int i, s, idx, with_ext, num_descs;
- int cb32 = (device->version < IOAT_VER_3_3) ? 1 : 0;
-
- dev_dbg(to_dev(chan), "%s\n", __func__);
- /* the engine requires at least two sources (we provide
- * at least 1 implied source in the DMA_PREP_CONTINUE case)
- */
- BUG_ON(src_cnt + dmaf_continue(flags) < 2);
-
- num_descs = ioat2_xferlen_to_descs(ioat, len);
- /* we need 2x the number of descriptors to cover greater than 3
- * sources (we need 1 extra source in the q-only continuation
- * case and 3 extra sources in the p+q continuation case.
- */
- if (src_cnt + dmaf_p_disabled_continue(flags) > 3 ||
- (dmaf_continue(flags) && !dmaf_p_disabled_continue(flags))) {
- with_ext = 1;
- num_descs *= 2;
- } else
- with_ext = 0;
-
- /* completion writes from the raid engine may pass completion
- * writes from the legacy engine, so we need one extra null
- * (legacy) descriptor to ensure all completion writes arrive in
- * order.
- */
- if (likely(num_descs) &&
- ioat2_check_space_lock(ioat, num_descs + cb32) == 0)
- idx = ioat->head;
- else
- return NULL;
- i = 0;
- do {
- struct ioat_raw_descriptor *descs[2];
- size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
-
- desc = ioat2_get_ring_ent(ioat, idx + i);
- pq = desc->pq;
-
- /* save a branch by unconditionally retrieving the
- * extended descriptor pq_set_src() knows to not write
- * to it in the single descriptor case
- */
- ext = ioat2_get_ring_ent(ioat, idx + i + with_ext);
- pq_ex = ext->pq_ex;
-
- descs[0] = (struct ioat_raw_descriptor *) pq;
- descs[1] = (struct ioat_raw_descriptor *) pq_ex;
-
- for (s = 0; s < src_cnt; s++)
- pq_set_src(descs, src[s], offset, scf[s], s);
-
- /* see the comment for dma_maxpq in include/linux/dmaengine.h */
- if (dmaf_p_disabled_continue(flags))
- pq_set_src(descs, dst[1], offset, 1, s++);
- else if (dmaf_continue(flags)) {
- pq_set_src(descs, dst[0], offset, 0, s++);
- pq_set_src(descs, dst[1], offset, 1, s++);
- pq_set_src(descs, dst[1], offset, 0, s++);
- }
- pq->size = xfer_size;
- pq->p_addr = dst[0] + offset;
- pq->q_addr = dst[1] + offset;
- pq->ctl = 0;
- pq->ctl_f.op = op;
- /* we turn on descriptor write back error status */
- if (device->cap & IOAT_CAP_DWBES)
- pq->ctl_f.wb_en = result ? 1 : 0;
- pq->ctl_f.src_cnt = src_cnt_to_hw(s);
- pq->ctl_f.p_disable = !!(flags & DMA_PREP_PQ_DISABLE_P);
- pq->ctl_f.q_disable = !!(flags & DMA_PREP_PQ_DISABLE_Q);
-
- len -= xfer_size;
- offset += xfer_size;
- } while ((i += 1 + with_ext) < num_descs);
-
- /* last pq descriptor carries the unmap parameters and fence bit */
- desc->txd.flags = flags;
- desc->len = total_len;
- if (result)
- desc->result = result;
- pq->ctl_f.fence = !!(flags & DMA_PREP_FENCE);
- dump_pq_desc_dbg(ioat, desc, ext);
-
- if (!cb32) {
- pq->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT);
- pq->ctl_f.compl_write = 1;
- compl_desc = desc;
- } else {
- /* completion descriptor carries interrupt bit */
- compl_desc = ioat2_get_ring_ent(ioat, idx + i);
- compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT;
- hw = compl_desc->hw;
- hw->ctl = 0;
- hw->ctl_f.null = 1;
- hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT);
- hw->ctl_f.compl_write = 1;
- hw->size = NULL_DESC_BUFFER_SIZE;
- dump_desc_dbg(ioat, compl_desc);
- }
-
-
- /* we leave the channel locked to ensure in order submission */
- return &compl_desc->txd;
-}
-
-static struct dma_async_tx_descriptor *
-__ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result,
- const dma_addr_t *dst, const dma_addr_t *src,
- unsigned int src_cnt, const unsigned char *scf,
- size_t len, unsigned long flags)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
- struct ioat_chan_common *chan = &ioat->base;
- struct ioatdma_device *device = chan->device;
- struct ioat_ring_ent *desc;
- size_t total_len = len;
- struct ioat_pq_descriptor *pq;
- u32 offset = 0;
- u8 op;
- int i, s, idx, num_descs;
-
- /* this function is only called with 9-16 sources */
- op = result ? IOAT_OP_PQ_VAL_16S : IOAT_OP_PQ_16S;
-
- dev_dbg(to_dev(chan), "%s\n", __func__);
-
- num_descs = ioat2_xferlen_to_descs(ioat, len);
-
- /*
- * 16 source pq is only available on cb3.3 and has no completion
- * write hw bug.
- */
- if (num_descs && ioat2_check_space_lock(ioat, num_descs) == 0)
- idx = ioat->head;
- else
- return NULL;
-
- i = 0;
-
- do {
- struct ioat_raw_descriptor *descs[4];
- size_t xfer_size = min_t(size_t, len, 1 << ioat->xfercap_log);
-
- desc = ioat2_get_ring_ent(ioat, idx + i);
- pq = desc->pq;
-
- descs[0] = (struct ioat_raw_descriptor *) pq;
-
- desc->sed = ioat3_alloc_sed(device, (src_cnt-2) >> 3);
- if (!desc->sed) {
- dev_err(to_dev(chan),
- "%s: no free sed entries\n", __func__);
- return NULL;
- }
-
- pq->sed_addr = desc->sed->dma;
- desc->sed->parent = desc;
-
- descs[1] = (struct ioat_raw_descriptor *)desc->sed->hw;
- descs[2] = (void *)descs[1] + 64;
-
- for (s = 0; s < src_cnt; s++)
- pq16_set_src(descs, src[s], offset, scf[s], s);
-
- /* see the comment for dma_maxpq in include/linux/dmaengine.h */
- if (dmaf_p_disabled_continue(flags))
- pq16_set_src(descs, dst[1], offset, 1, s++);
- else if (dmaf_continue(flags)) {
- pq16_set_src(descs, dst[0], offset, 0, s++);
- pq16_set_src(descs, dst[1], offset, 1, s++);
- pq16_set_src(descs, dst[1], offset, 0, s++);
- }
-
- pq->size = xfer_size;
- pq->p_addr = dst[0] + offset;
- pq->q_addr = dst[1] + offset;
- pq->ctl = 0;
- pq->ctl_f.op = op;
- pq->ctl_f.src_cnt = src16_cnt_to_hw(s);
- /* we turn on descriptor write back error status */
- if (device->cap & IOAT_CAP_DWBES)
- pq->ctl_f.wb_en = result ? 1 : 0;
- pq->ctl_f.p_disable = !!(flags & DMA_PREP_PQ_DISABLE_P);
- pq->ctl_f.q_disable = !!(flags & DMA_PREP_PQ_DISABLE_Q);
-
- len -= xfer_size;
- offset += xfer_size;
- } while (++i < num_descs);
-
- /* last pq descriptor carries the unmap parameters and fence bit */
- desc->txd.flags = flags;
- desc->len = total_len;
- if (result)
- desc->result = result;
- pq->ctl_f.fence = !!(flags & DMA_PREP_FENCE);
-
- /* with cb3.3 we should be able to do completion w/o a null desc */
- pq->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT);
- pq->ctl_f.compl_write = 1;
-
- dump_pq16_desc_dbg(ioat, desc);
-
- /* we leave the channel locked to ensure in order submission */
- return &desc->txd;
-}
-
-static int src_cnt_flags(unsigned int src_cnt, unsigned long flags)
-{
- if (dmaf_p_disabled_continue(flags))
- return src_cnt + 1;
- else if (dmaf_continue(flags))
- return src_cnt + 3;
- else
- return src_cnt;
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_pq(struct dma_chan *chan, dma_addr_t *dst, dma_addr_t *src,
- unsigned int src_cnt, const unsigned char *scf, size_t len,
- unsigned long flags)
-{
- /* specify valid address for disabled result */
- if (flags & DMA_PREP_PQ_DISABLE_P)
- dst[0] = dst[1];
- if (flags & DMA_PREP_PQ_DISABLE_Q)
- dst[1] = dst[0];
-
- /* handle the single source multiply case from the raid6
- * recovery path
- */
- if ((flags & DMA_PREP_PQ_DISABLE_P) && src_cnt == 1) {
- dma_addr_t single_source[2];
- unsigned char single_source_coef[2];
-
- BUG_ON(flags & DMA_PREP_PQ_DISABLE_Q);
- single_source[0] = src[0];
- single_source[1] = src[0];
- single_source_coef[0] = scf[0];
- single_source_coef[1] = 0;
-
- return src_cnt_flags(src_cnt, flags) > 8 ?
- __ioat3_prep_pq16_lock(chan, NULL, dst, single_source,
- 2, single_source_coef, len,
- flags) :
- __ioat3_prep_pq_lock(chan, NULL, dst, single_source, 2,
- single_source_coef, len, flags);
-
- } else {
- return src_cnt_flags(src_cnt, flags) > 8 ?
- __ioat3_prep_pq16_lock(chan, NULL, dst, src, src_cnt,
- scf, len, flags) :
- __ioat3_prep_pq_lock(chan, NULL, dst, src, src_cnt,
- scf, len, flags);
- }
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_pq_val(struct dma_chan *chan, dma_addr_t *pq, dma_addr_t *src,
- unsigned int src_cnt, const unsigned char *scf, size_t len,
- enum sum_check_flags *pqres, unsigned long flags)
-{
- /* specify valid address for disabled result */
- if (flags & DMA_PREP_PQ_DISABLE_P)
- pq[0] = pq[1];
- if (flags & DMA_PREP_PQ_DISABLE_Q)
- pq[1] = pq[0];
-
- /* the cleanup routine only sets bits on validate failure, it
- * does not clear bits on validate success... so clear it here
- */
- *pqres = 0;
-
- return src_cnt_flags(src_cnt, flags) > 8 ?
- __ioat3_prep_pq16_lock(chan, pqres, pq, src, src_cnt, scf, len,
- flags) :
- __ioat3_prep_pq_lock(chan, pqres, pq, src, src_cnt, scf, len,
- flags);
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_pqxor(struct dma_chan *chan, dma_addr_t dst, dma_addr_t *src,
- unsigned int src_cnt, size_t len, unsigned long flags)
-{
- unsigned char scf[src_cnt];
- dma_addr_t pq[2];
-
- memset(scf, 0, src_cnt);
- pq[0] = dst;
- flags |= DMA_PREP_PQ_DISABLE_Q;
- pq[1] = dst; /* specify valid address for disabled result */
-
- return src_cnt_flags(src_cnt, flags) > 8 ?
- __ioat3_prep_pq16_lock(chan, NULL, pq, src, src_cnt, scf, len,
- flags) :
- __ioat3_prep_pq_lock(chan, NULL, pq, src, src_cnt, scf, len,
- flags);
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_pqxor_val(struct dma_chan *chan, dma_addr_t *src,
- unsigned int src_cnt, size_t len,
- enum sum_check_flags *result, unsigned long flags)
-{
- unsigned char scf[src_cnt];
- dma_addr_t pq[2];
-
- /* the cleanup routine only sets bits on validate failure, it
- * does not clear bits on validate success... so clear it here
- */
- *result = 0;
-
- memset(scf, 0, src_cnt);
- pq[0] = src[0];
- flags |= DMA_PREP_PQ_DISABLE_Q;
- pq[1] = pq[0]; /* specify valid address for disabled result */
-
- return src_cnt_flags(src_cnt, flags) > 8 ?
- __ioat3_prep_pq16_lock(chan, result, pq, &src[1], src_cnt - 1,
- scf, len, flags) :
- __ioat3_prep_pq_lock(chan, result, pq, &src[1], src_cnt - 1,
- scf, len, flags);
-}
-
-static struct dma_async_tx_descriptor *
-ioat3_prep_interrupt_lock(struct dma_chan *c, unsigned long flags)
-{
- struct ioat2_dma_chan *ioat = to_ioat2_chan(c);
- struct ioat_ring_ent *desc;
- struct ioat_dma_descriptor *hw;
-
- if (ioat2_check_space_lock(ioat, 1) == 0)
- desc = ioat2_get_ring_ent(ioat, ioat->head);
- else
- return NULL;
-
- hw = desc->hw;
- hw->ctl = 0;
- hw->ctl_f.null = 1;
- hw->ctl_f.int_en = 1;
- hw->ctl_f.fence = !!(flags & DMA_PREP_FENCE);
- hw->ctl_f.compl_write = 1;
- hw->size = NULL_DESC_BUFFER_SIZE;
- hw->src_addr = 0;
- hw->dst_addr = 0;
-
- desc->txd.flags = flags;
- desc->len = 1;
-
- dump_desc_dbg(ioat, desc);
-
- /* we leave the channel locked to ensure in order submission */
- return &desc->txd;
-}
-
-static void ioat3_dma_test_callback(void *dma_async_param)
-{
- struct completion *cmp = dma_async_param;
-
- complete(cmp);
-}
-
-#define IOAT_NUM_SRC_TEST 6 /* must be <= 8 */
-static int ioat_xor_val_self_test(struct ioatdma_device *device)
-{
- 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 = &device->pdev->dev;
- struct dma_device *dma = &device->common;
- 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))
- goto dma_unmap;
-
- for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
- dma_srcs[i] = DMA_ERROR_CODE;
- 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]))
- 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 = ioat3_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_ERROR_CODE;
- 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]))
- 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 = ioat3_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_ERROR_CODE;
- 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]))
- 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 = ioat3_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) {
- if (dest_dma != DMA_ERROR_CODE)
- dma_unmap_page(dev, dest_dma, PAGE_SIZE,
- DMA_FROM_DEVICE);
- for (i = 0; i < IOAT_NUM_SRC_TEST; i++)
- if (dma_srcs[i] != DMA_ERROR_CODE)
- dma_unmap_page(dev, dma_srcs[i], PAGE_SIZE,
- DMA_TO_DEVICE);
- } else if (op == IOAT_OP_XOR_VAL) {
- for (i = 0; i < IOAT_NUM_SRC_TEST + 1; i++)
- if (dma_srcs[i] != DMA_ERROR_CODE)
- 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 *device)
-{
- int rc = ioat_dma_self_test(device);
-
- if (rc)
- return rc;
-
- rc = ioat_xor_val_self_test(device);
- if (rc)
- return rc;
-
- return 0;
-}
-
-static int ioat3_irq_reinit(struct ioatdma_device *device)
-{
- struct pci_dev *pdev = device->pdev;
- int irq = pdev->irq, i;
-
- if (!is_bwd_ioat(pdev))
- return 0;
-
- switch (device->irq_mode) {
- case IOAT_MSIX:
- for (i = 0; i < device->common.chancnt; i++) {
- struct msix_entry *msix = &device->msix_entries[i];
- struct ioat_chan_common *chan;
-
- chan = ioat_chan_by_index(device, i);
- devm_free_irq(&pdev->dev, msix->vector, chan);
- }
-
- pci_disable_msix(pdev);
- break;
- case IOAT_MSI:
- pci_disable_msi(pdev);
- /* fall through */
- case IOAT_INTX:
- devm_free_irq(&pdev->dev, irq, device);
- break;
- default:
- return 0;
- }
- device->irq_mode = IOAT_NOIRQ;
-
- return ioat_dma_setup_interrupts(device);
-}
-
-static int ioat3_reset_hw(struct ioat_chan_common *chan)
-{
- /* throw away whatever the channel was doing and get it
- * initialized, with ioat3 specific workarounds
- */
- struct ioatdma_device *device = chan->device;
- struct pci_dev *pdev = device->pdev;
- u32 chanerr;
- u16 dev_id;
- int err;
-
- ioat2_quiesce(chan, msecs_to_jiffies(100));
-
- chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET);
- writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET);
-
- if (device->version < IOAT_VER_3_3) {
- /* clear any pending errors */
- err = pci_read_config_dword(pdev,
- IOAT_PCI_CHANERR_INT_OFFSET, &chanerr);
- if (err) {
- dev_err(&pdev->dev,
- "channel error register unreachable\n");
- return err;
- }
- pci_write_config_dword(pdev,
- IOAT_PCI_CHANERR_INT_OFFSET, chanerr);
-
- /* Clear DMAUNCERRSTS Cfg-Reg Parity Error status bit
- * (workaround for spurious config parity error after restart)
- */
- pci_read_config_word(pdev, IOAT_PCI_DEVICE_ID_OFFSET, &dev_id);
- if (dev_id == PCI_DEVICE_ID_INTEL_IOAT_TBG0) {
- pci_write_config_dword(pdev,
- IOAT_PCI_DMAUNCERRSTS_OFFSET,
- 0x10);
- }
- }
-
- err = ioat2_reset_sync(chan, msecs_to_jiffies(200));
- if (!err)
- err = ioat3_irq_reinit(device);
-
- if (err)
- dev_err(&pdev->dev, "Failed to reset: %d\n", err);
-
- return err;
-}
-
-static void ioat3_intr_quirk(struct ioatdma_device *device)
-{
- struct dma_device *dma;
- struct dma_chan *c;
- struct ioat_chan_common *chan;
- u32 errmask;
-
- dma = &device->common;
-
- /*
- * if we have descriptor write back error status, we mask the
- * error interrupts
- */
- if (device->cap & IOAT_CAP_DWBES) {
- list_for_each_entry(c, &dma->channels, device_node) {
- chan = to_chan_common(c);
- errmask = readl(chan->reg_base +
- IOAT_CHANERR_MASK_OFFSET);
- errmask |= IOAT_CHANERR_XOR_P_OR_CRC_ERR |
- IOAT_CHANERR_XOR_Q_ERR;
- writel(errmask, chan->reg_base +
- IOAT_CHANERR_MASK_OFFSET);
- }
- }
-}
-
-int ioat3_dma_probe(struct ioatdma_device *device, int dca)
-{
- struct pci_dev *pdev = device->pdev;
- int dca_en = system_has_dca_enabled(pdev);
- struct dma_device *dma;
- struct dma_chan *c;
- struct ioat_chan_common *chan;
- bool is_raid_device = false;
- int err;
-
- device->enumerate_channels = ioat2_enumerate_channels;
- device->reset_hw = ioat3_reset_hw;
- device->self_test = ioat3_dma_self_test;
- device->intr_quirk = ioat3_intr_quirk;
- dma = &device->common;
- dma->device_prep_dma_memcpy = ioat2_dma_prep_memcpy_lock;
- dma->device_issue_pending = ioat2_issue_pending;
- dma->device_alloc_chan_resources = ioat2_alloc_chan_resources;
- dma->device_free_chan_resources = ioat2_free_chan_resources;
-
- dma_cap_set(DMA_INTERRUPT, dma->cap_mask);
- dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock;
-
- device->cap = readl(device->reg_base + IOAT_DMA_CAP_OFFSET);
-
- if (is_xeon_cb32(pdev) || is_bwd_noraid(pdev))
- device->cap &= ~(IOAT_CAP_XOR | IOAT_CAP_PQ | IOAT_CAP_RAID16SS);
-
- /* dca is incompatible with raid operations */
- if (dca_en && (device->cap & (IOAT_CAP_XOR|IOAT_CAP_PQ)))
- device->cap &= ~(IOAT_CAP_XOR|IOAT_CAP_PQ);
-
- if (device->cap & IOAT_CAP_XOR) {
- is_raid_device = true;
- dma->max_xor = 8;
-
- dma_cap_set(DMA_XOR, dma->cap_mask);
- dma->device_prep_dma_xor = ioat3_prep_xor;
-
- dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
- dma->device_prep_dma_xor_val = ioat3_prep_xor_val;
- }
-
- if (device->cap & IOAT_CAP_PQ) {
- is_raid_device = true;
-
- dma->device_prep_dma_pq = ioat3_prep_pq;
- dma->device_prep_dma_pq_val = ioat3_prep_pq_val;
- dma_cap_set(DMA_PQ, dma->cap_mask);
- dma_cap_set(DMA_PQ_VAL, dma->cap_mask);
-
- if (device->cap & IOAT_CAP_RAID16SS) {
- dma_set_maxpq(dma, 16, 0);
- } else {
- dma_set_maxpq(dma, 8, 0);
- }
-
- if (!(device->cap & IOAT_CAP_XOR)) {
- dma->device_prep_dma_xor = ioat3_prep_pqxor;
- dma->device_prep_dma_xor_val = ioat3_prep_pqxor_val;
- dma_cap_set(DMA_XOR, dma->cap_mask);
- dma_cap_set(DMA_XOR_VAL, dma->cap_mask);
-
- if (device->cap & IOAT_CAP_RAID16SS) {
- dma->max_xor = 16;
- } else {
- dma->max_xor = 8;
- }
- }
- }
-
- dma->device_tx_status = ioat3_tx_status;
- device->cleanup_fn = ioat3_cleanup_event;
- device->timer_fn = ioat3_timer_event;
-
- /* starting with CB3.3 super extended descriptors are supported */
- if (device->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 */
- device->sed_hw_pool[i] = dmam_pool_create(pool_name,
- &pdev->dev,
- SED_SIZE * (i + 1), 64, 0);
- if (!device->sed_hw_pool[i])
- return -ENOMEM;
-
- }
- }
-
- err = ioat_probe(device);
- if (err)
- return err;
-
- list_for_each_entry(c, &dma->channels, device_node) {
- chan = to_chan_common(c);
- writel(IOAT_DMA_DCA_ANY_CPU,
- chan->reg_base + IOAT_DCACTRL_OFFSET);
- }
-
- err = ioat_register(device);
- if (err)
- return err;
-
- ioat_kobject_add(device, &ioat2_ktype);
-
- if (dca)
- device->dca = ioat3_dca_init(pdev, device->reg_base);
-
- return 0;
-}
Code Review / kvmfornfv.git / blobdiff