diff options
Diffstat (limited to 'kernel/drivers/dma/ioat/dma_v3.c')
| -rw-r--r-- | kernel/drivers/dma/ioat/dma_v3.c | 1717 |
1 files changed, 0 insertions, 1717 deletions
diff --git a/kernel/drivers/dma/ioat/dma_v3.c b/kernel/drivers/dma/ioat/dma_v3.c deleted file mode 100644 index 64790a45e..000000000 --- a/kernel/drivers/dma/ioat/dma_v3.c +++ /dev/null @@ -1,1717 +0,0 @@ -/* - * 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; -} |