+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * offload engine driver for the Intel Xscale series of i/o processors
- * Copyright © 2006, Intel Corporation.
- */
-
-/*
- * This driver supports the asynchrounous DMA copy and RAID engines available
- * on the Intel Xscale(R) family of I/O Processors (IOP 32x, 33x, 134x)
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/dma-mapping.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-#include <linux/prefetch.h>
-#include <linux/memory.h>
-#include <linux/ioport.h>
-#include <linux/raid/pq.h>
-#include <linux/slab.h>
-
-#include "iop-adma.h"
-#include "dmaengine.h"
-
-#define to_iop_adma_chan(chan) container_of(chan, struct iop_adma_chan, common)
-#define to_iop_adma_device(dev) \
- container_of(dev, struct iop_adma_device, common)
-#define tx_to_iop_adma_slot(tx) \
- container_of(tx, struct iop_adma_desc_slot, async_tx)
-
-/**
- * iop_adma_free_slots - flags descriptor slots for reuse
- * @slot: Slot to free
- * Caller must hold &iop_chan->lock while calling this function
- */
-static void iop_adma_free_slots(struct iop_adma_desc_slot *slot)
-{
- int stride = slot->slots_per_op;
-
- while (stride--) {
- slot->slots_per_op = 0;
- slot = list_entry(slot->slot_node.next,
- struct iop_adma_desc_slot,
- slot_node);
- }
-}
-
-static dma_cookie_t
-iop_adma_run_tx_complete_actions(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *iop_chan, dma_cookie_t cookie)
-{
- struct dma_async_tx_descriptor *tx = &desc->async_tx;
-
- BUG_ON(tx->cookie < 0);
- if (tx->cookie > 0) {
- cookie = tx->cookie;
- tx->cookie = 0;
-
- /* call the callback (must not sleep or submit new
- * operations to this channel)
- */
- dmaengine_desc_get_callback_invoke(tx, NULL);
-
- dma_descriptor_unmap(tx);
- if (desc->group_head)
- desc->group_head = NULL;
- }
-
- /* run dependent operations */
- dma_run_dependencies(tx);
-
- return cookie;
-}
-
-static int
-iop_adma_clean_slot(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *iop_chan)
-{
- /* the client is allowed to attach dependent operations
- * until 'ack' is set
- */
- if (!async_tx_test_ack(&desc->async_tx))
- return 0;
-
- /* leave the last descriptor in the chain
- * so we can append to it
- */
- if (desc->chain_node.next == &iop_chan->chain)
- return 1;
-
- dev_dbg(iop_chan->device->common.dev,
- "\tfree slot: %d slots_per_op: %d\n",
- desc->idx, desc->slots_per_op);
-
- list_del(&desc->chain_node);
- iop_adma_free_slots(desc);
-
- return 0;
-}
-
-static void __iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
-{
- struct iop_adma_desc_slot *iter, *_iter, *grp_start = NULL;
- dma_cookie_t cookie = 0;
- u32 current_desc = iop_chan_get_current_descriptor(iop_chan);
- int busy = iop_chan_is_busy(iop_chan);
- int seen_current = 0, slot_cnt = 0, slots_per_op = 0;
-
- dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
- /* free completed slots from the chain starting with
- * the oldest descriptor
- */
- list_for_each_entry_safe(iter, _iter, &iop_chan->chain,
- chain_node) {
- pr_debug("\tcookie: %d slot: %d busy: %d "
- "this_desc: %pad next_desc: %#llx ack: %d\n",
- iter->async_tx.cookie, iter->idx, busy,
- &iter->async_tx.phys, (u64)iop_desc_get_next_desc(iter),
- async_tx_test_ack(&iter->async_tx));
- prefetch(_iter);
- prefetch(&_iter->async_tx);
-
- /* do not advance past the current descriptor loaded into the
- * hardware channel, subsequent descriptors are either in
- * process or have not been submitted
- */
- if (seen_current)
- break;
-
- /* stop the search if we reach the current descriptor and the
- * channel is busy, or if it appears that the current descriptor
- * needs to be re-read (i.e. has been appended to)
- */
- if (iter->async_tx.phys == current_desc) {
- BUG_ON(seen_current++);
- if (busy || iop_desc_get_next_desc(iter))
- break;
- }
-
- /* detect the start of a group transaction */
- if (!slot_cnt && !slots_per_op) {
- slot_cnt = iter->slot_cnt;
- slots_per_op = iter->slots_per_op;
- if (slot_cnt <= slots_per_op) {
- slot_cnt = 0;
- slots_per_op = 0;
- }
- }
-
- if (slot_cnt) {
- pr_debug("\tgroup++\n");
- if (!grp_start)
- grp_start = iter;
- slot_cnt -= slots_per_op;
- }
-
- /* all the members of a group are complete */
- if (slots_per_op != 0 && slot_cnt == 0) {
- struct iop_adma_desc_slot *grp_iter, *_grp_iter;
- int end_of_chain = 0;
- pr_debug("\tgroup end\n");
-
- /* collect the total results */
- if (grp_start->xor_check_result) {
- u32 zero_sum_result = 0;
- slot_cnt = grp_start->slot_cnt;
- grp_iter = grp_start;
-
- list_for_each_entry_from(grp_iter,
- &iop_chan->chain, chain_node) {
- zero_sum_result |=
- iop_desc_get_zero_result(grp_iter);
- pr_debug("\titer%d result: %d\n",
- grp_iter->idx, zero_sum_result);
- slot_cnt -= slots_per_op;
- if (slot_cnt == 0)
- break;
- }
- pr_debug("\tgrp_start->xor_check_result: %p\n",
- grp_start->xor_check_result);
- *grp_start->xor_check_result = zero_sum_result;
- }
-
- /* clean up the group */
- slot_cnt = grp_start->slot_cnt;
- grp_iter = grp_start;
- list_for_each_entry_safe_from(grp_iter, _grp_iter,
- &iop_chan->chain, chain_node) {
- cookie = iop_adma_run_tx_complete_actions(
- grp_iter, iop_chan, cookie);
-
- slot_cnt -= slots_per_op;
- end_of_chain = iop_adma_clean_slot(grp_iter,
- iop_chan);
-
- if (slot_cnt == 0 || end_of_chain)
- break;
- }
-
- /* the group should be complete at this point */
- BUG_ON(slot_cnt);
-
- slots_per_op = 0;
- grp_start = NULL;
- if (end_of_chain)
- break;
- else
- continue;
- } else if (slots_per_op) /* wait for group completion */
- continue;
-
- /* write back zero sum results (single descriptor case) */
- if (iter->xor_check_result && iter->async_tx.cookie)
- *iter->xor_check_result =
- iop_desc_get_zero_result(iter);
-
- cookie = iop_adma_run_tx_complete_actions(
- iter, iop_chan, cookie);
-
- if (iop_adma_clean_slot(iter, iop_chan))
- break;
- }
-
- if (cookie > 0) {
- iop_chan->common.completed_cookie = cookie;
- pr_debug("\tcompleted cookie %d\n", cookie);
- }
-}
-
-static void
-iop_adma_slot_cleanup(struct iop_adma_chan *iop_chan)
-{
- spin_lock_bh(&iop_chan->lock);
- __iop_adma_slot_cleanup(iop_chan);
- spin_unlock_bh(&iop_chan->lock);
-}
-
-static void iop_adma_tasklet(struct tasklet_struct *t)
-{
- struct iop_adma_chan *iop_chan = from_tasklet(iop_chan, t,
- irq_tasklet);
-
- /* lockdep will flag depedency submissions as potentially
- * recursive locking, this is not the case as a dependency
- * submission will never recurse a channels submit routine.
- * There are checks in async_tx.c to prevent this.
- */
- spin_lock_nested(&iop_chan->lock, SINGLE_DEPTH_NESTING);
- __iop_adma_slot_cleanup(iop_chan);
- spin_unlock(&iop_chan->lock);
-}
-
-static struct iop_adma_desc_slot *
-iop_adma_alloc_slots(struct iop_adma_chan *iop_chan, int num_slots,
- int slots_per_op)
-{
- struct iop_adma_desc_slot *iter, *_iter, *alloc_start = NULL;
- LIST_HEAD(chain);
- int slots_found, retry = 0;
-
- /* start search from the last allocated descrtiptor
- * if a contiguous allocation can not be found start searching
- * from the beginning of the list
- */
-retry:
- slots_found = 0;
- if (retry == 0)
- iter = iop_chan->last_used;
- else
- iter = list_entry(&iop_chan->all_slots,
- struct iop_adma_desc_slot,
- slot_node);
-
- list_for_each_entry_safe_continue(
- iter, _iter, &iop_chan->all_slots, slot_node) {
- prefetch(_iter);
- prefetch(&_iter->async_tx);
- if (iter->slots_per_op) {
- /* give up after finding the first busy slot
- * on the second pass through the list
- */
- if (retry)
- break;
-
- slots_found = 0;
- continue;
- }
-
- /* start the allocation if the slot is correctly aligned */
- if (!slots_found++) {
- if (iop_desc_is_aligned(iter, slots_per_op))
- alloc_start = iter;
- else {
- slots_found = 0;
- continue;
- }
- }
-
- if (slots_found == num_slots) {
- struct iop_adma_desc_slot *alloc_tail = NULL;
- struct iop_adma_desc_slot *last_used = NULL;
- iter = alloc_start;
- while (num_slots) {
- int i;
- dev_dbg(iop_chan->device->common.dev,
- "allocated slot: %d "
- "(desc %p phys: %#llx) slots_per_op %d\n",
- iter->idx, iter->hw_desc,
- (u64)iter->async_tx.phys, slots_per_op);
-
- /* pre-ack all but the last descriptor */
- if (num_slots != slots_per_op)
- async_tx_ack(&iter->async_tx);
-
- list_add_tail(&iter->chain_node, &chain);
- alloc_tail = iter;
- iter->async_tx.cookie = 0;
- iter->slot_cnt = num_slots;
- iter->xor_check_result = NULL;
- for (i = 0; i < slots_per_op; i++) {
- iter->slots_per_op = slots_per_op - i;
- last_used = iter;
- iter = list_entry(iter->slot_node.next,
- struct iop_adma_desc_slot,
- slot_node);
- }
- num_slots -= slots_per_op;
- }
- alloc_tail->group_head = alloc_start;
- alloc_tail->async_tx.cookie = -EBUSY;
- list_splice(&chain, &alloc_tail->tx_list);
- iop_chan->last_used = last_used;
- iop_desc_clear_next_desc(alloc_start);
- iop_desc_clear_next_desc(alloc_tail);
- return alloc_tail;
- }
- }
- if (!retry++)
- goto retry;
-
- /* perform direct reclaim if the allocation fails */
- __iop_adma_slot_cleanup(iop_chan);
-
- return NULL;
-}
-
-static void iop_adma_check_threshold(struct iop_adma_chan *iop_chan)
-{
- dev_dbg(iop_chan->device->common.dev, "pending: %d\n",
- iop_chan->pending);
-
- if (iop_chan->pending >= IOP_ADMA_THRESHOLD) {
- iop_chan->pending = 0;
- iop_chan_append(iop_chan);
- }
-}
-
-static dma_cookie_t
-iop_adma_tx_submit(struct dma_async_tx_descriptor *tx)
-{
- struct iop_adma_desc_slot *sw_desc = tx_to_iop_adma_slot(tx);
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(tx->chan);
- struct iop_adma_desc_slot *grp_start, *old_chain_tail;
- int slot_cnt;
- dma_cookie_t cookie;
- dma_addr_t next_dma;
-
- grp_start = sw_desc->group_head;
- slot_cnt = grp_start->slot_cnt;
-
- spin_lock_bh(&iop_chan->lock);
- cookie = dma_cookie_assign(tx);
-
- old_chain_tail = list_entry(iop_chan->chain.prev,
- struct iop_adma_desc_slot, chain_node);
- list_splice_init(&sw_desc->tx_list,
- &old_chain_tail->chain_node);
-
- /* fix up the hardware chain */
- next_dma = grp_start->async_tx.phys;
- iop_desc_set_next_desc(old_chain_tail, next_dma);
- BUG_ON(iop_desc_get_next_desc(old_chain_tail) != next_dma); /* flush */
-
- /* check for pre-chained descriptors */
- iop_paranoia(iop_desc_get_next_desc(sw_desc));
-
- /* increment the pending count by the number of slots
- * memcpy operations have a 1:1 (slot:operation) relation
- * other operations are heavier and will pop the threshold
- * more often.
- */
- iop_chan->pending += slot_cnt;
- iop_adma_check_threshold(iop_chan);
- spin_unlock_bh(&iop_chan->lock);
-
- dev_dbg(iop_chan->device->common.dev, "%s cookie: %d slot: %d\n",
- __func__, sw_desc->async_tx.cookie, sw_desc->idx);
-
- return cookie;
-}
-
-static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan);
-static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan);
-
-/**
- * iop_adma_alloc_chan_resources - returns the number of allocated descriptors
- * @chan: allocate descriptor resources for this channel
- *
- * Note: We keep the slots for 1 operation on iop_chan->chain at all times. To
- * avoid deadlock, via async_xor, num_descs_in_pool must at a minimum be
- * greater than 2x the number slots needed to satisfy a device->max_xor
- * request.
- * */
-static int iop_adma_alloc_chan_resources(struct dma_chan *chan)
-{
- char *hw_desc;
- dma_addr_t dma_desc;
- int idx;
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *slot = NULL;
- int init = iop_chan->slots_allocated ? 0 : 1;
- struct iop_adma_platform_data *plat_data =
- dev_get_platdata(&iop_chan->device->pdev->dev);
- int num_descs_in_pool = plat_data->pool_size/IOP_ADMA_SLOT_SIZE;
-
- /* Allocate descriptor slots */
- do {
- idx = iop_chan->slots_allocated;
- if (idx == num_descs_in_pool)
- break;
-
- slot = kzalloc(sizeof(*slot), GFP_KERNEL);
- if (!slot) {
- printk(KERN_INFO "IOP ADMA Channel only initialized"
- " %d descriptor slots", idx);
- break;
- }
- hw_desc = (char *) iop_chan->device->dma_desc_pool_virt;
- slot->hw_desc = (void *) &hw_desc[idx * IOP_ADMA_SLOT_SIZE];
-
- dma_async_tx_descriptor_init(&slot->async_tx, chan);
- slot->async_tx.tx_submit = iop_adma_tx_submit;
- INIT_LIST_HEAD(&slot->tx_list);
- INIT_LIST_HEAD(&slot->chain_node);
- INIT_LIST_HEAD(&slot->slot_node);
- dma_desc = iop_chan->device->dma_desc_pool;
- slot->async_tx.phys = dma_desc + idx * IOP_ADMA_SLOT_SIZE;
- slot->idx = idx;
-
- spin_lock_bh(&iop_chan->lock);
- iop_chan->slots_allocated++;
- list_add_tail(&slot->slot_node, &iop_chan->all_slots);
- spin_unlock_bh(&iop_chan->lock);
- } while (iop_chan->slots_allocated < num_descs_in_pool);
-
- if (idx && !iop_chan->last_used)
- iop_chan->last_used = list_entry(iop_chan->all_slots.next,
- struct iop_adma_desc_slot,
- slot_node);
-
- dev_dbg(iop_chan->device->common.dev,
- "allocated %d descriptor slots last_used: %p\n",
- iop_chan->slots_allocated, iop_chan->last_used);
-
- /* initialize the channel and the chain with a null operation */
- if (init) {
- if (dma_has_cap(DMA_MEMCPY,
- iop_chan->device->common.cap_mask))
- iop_chan_start_null_memcpy(iop_chan);
- else if (dma_has_cap(DMA_XOR,
- iop_chan->device->common.cap_mask))
- iop_chan_start_null_xor(iop_chan);
- else
- BUG();
- }
-
- return (idx > 0) ? idx : -ENOMEM;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_interrupt(struct dma_chan *chan, unsigned long flags)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- int slot_cnt, slots_per_op;
-
- dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_interrupt_slot_count(&slots_per_op, iop_chan);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
- iop_desc_init_interrupt(grp_start, iop_chan);
- sw_desc->async_tx.flags = flags;
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dma_dest,
- dma_addr_t dma_src, size_t len, unsigned long flags)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- int slot_cnt, slots_per_op;
-
- if (unlikely(!len))
- return NULL;
- BUG_ON(len > IOP_ADMA_MAX_BYTE_COUNT);
-
- dev_dbg(iop_chan->device->common.dev, "%s len: %zu\n",
- __func__, len);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_memcpy_slot_count(len, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
- iop_desc_init_memcpy(grp_start, flags);
- iop_desc_set_byte_count(grp_start, iop_chan, len);
- iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
- iop_desc_set_memcpy_src_addr(grp_start, dma_src);
- sw_desc->async_tx.flags = flags;
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_xor(struct dma_chan *chan, dma_addr_t dma_dest,
- dma_addr_t *dma_src, unsigned int src_cnt, size_t len,
- unsigned long flags)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- int slot_cnt, slots_per_op;
-
- if (unlikely(!len))
- return NULL;
- BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
- dev_dbg(iop_chan->device->common.dev,
- "%s src_cnt: %d len: %zu flags: %lx\n",
- __func__, src_cnt, len, flags);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_xor_slot_count(len, src_cnt, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
- iop_desc_init_xor(grp_start, src_cnt, flags);
- iop_desc_set_byte_count(grp_start, iop_chan, len);
- iop_desc_set_dest_addr(grp_start, iop_chan, dma_dest);
- sw_desc->async_tx.flags = flags;
- while (src_cnt--)
- iop_desc_set_xor_src_addr(grp_start, src_cnt,
- dma_src[src_cnt]);
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_xor_val(struct dma_chan *chan, dma_addr_t *dma_src,
- unsigned int src_cnt, size_t len, u32 *result,
- unsigned long flags)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- int slot_cnt, slots_per_op;
-
- if (unlikely(!len))
- return NULL;
-
- dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %zu\n",
- __func__, src_cnt, len);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_zero_sum_slot_count(len, src_cnt, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
- iop_desc_init_zero_sum(grp_start, src_cnt, flags);
- iop_desc_set_zero_sum_byte_count(grp_start, len);
- grp_start->xor_check_result = result;
- pr_debug("\t%s: grp_start->xor_check_result: %p\n",
- __func__, grp_start->xor_check_result);
- sw_desc->async_tx.flags = flags;
- while (src_cnt--)
- iop_desc_set_zero_sum_src_addr(grp_start, src_cnt,
- dma_src[src_cnt]);
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_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)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *g;
- int slot_cnt, slots_per_op;
- int continue_srcs;
-
- if (unlikely(!len))
- return NULL;
- BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
- dev_dbg(iop_chan->device->common.dev,
- "%s src_cnt: %d len: %zu flags: %lx\n",
- __func__, src_cnt, len, flags);
-
- if (dmaf_p_disabled_continue(flags))
- continue_srcs = 1+src_cnt;
- else if (dmaf_continue(flags))
- continue_srcs = 3+src_cnt;
- else
- continue_srcs = 0+src_cnt;
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_pq_slot_count(len, continue_srcs, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- int i;
-
- g = sw_desc->group_head;
- iop_desc_set_byte_count(g, iop_chan, len);
-
- /* even if P is disabled its destination address (bits
- * [3:0]) must match Q. It is ok if P points to an
- * invalid address, it won't be written.
- */
- if (flags & DMA_PREP_PQ_DISABLE_P)
- dst[0] = dst[1] & 0x7;
-
- iop_desc_set_pq_addr(g, dst);
- sw_desc->async_tx.flags = flags;
- for (i = 0; i < src_cnt; i++)
- iop_desc_set_pq_src_addr(g, i, src[i], scf[i]);
-
- /* if we are continuing a previous operation factor in
- * the old p and q values, see the comment for dma_maxpq
- * in include/linux/dmaengine.h
- */
- if (dmaf_p_disabled_continue(flags))
- iop_desc_set_pq_src_addr(g, i++, dst[1], 1);
- else if (dmaf_continue(flags)) {
- iop_desc_set_pq_src_addr(g, i++, dst[0], 0);
- iop_desc_set_pq_src_addr(g, i++, dst[1], 1);
- iop_desc_set_pq_src_addr(g, i++, dst[1], 0);
- }
- iop_desc_init_pq(g, i, flags);
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static struct dma_async_tx_descriptor *
-iop_adma_prep_dma_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)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *sw_desc, *g;
- int slot_cnt, slots_per_op;
-
- if (unlikely(!len))
- return NULL;
- BUG_ON(len > IOP_ADMA_XOR_MAX_BYTE_COUNT);
-
- dev_dbg(iop_chan->device->common.dev, "%s src_cnt: %d len: %zu\n",
- __func__, src_cnt, len);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_pq_zero_sum_slot_count(len, src_cnt + 2, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- /* for validate operations p and q are tagged onto the
- * end of the source list
- */
- int pq_idx = src_cnt;
-
- g = sw_desc->group_head;
- iop_desc_init_pq_zero_sum(g, src_cnt+2, flags);
- iop_desc_set_pq_zero_sum_byte_count(g, len);
- g->pq_check_result = pqres;
- pr_debug("\t%s: g->pq_check_result: %p\n",
- __func__, g->pq_check_result);
- sw_desc->async_tx.flags = flags;
- while (src_cnt--)
- iop_desc_set_pq_zero_sum_src_addr(g, src_cnt,
- src[src_cnt],
- scf[src_cnt]);
- iop_desc_set_pq_zero_sum_addr(g, pq_idx, src);
- }
- spin_unlock_bh(&iop_chan->lock);
-
- return sw_desc ? &sw_desc->async_tx : NULL;
-}
-
-static void iop_adma_free_chan_resources(struct dma_chan *chan)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- struct iop_adma_desc_slot *iter, *_iter;
- int in_use_descs = 0;
-
- iop_adma_slot_cleanup(iop_chan);
-
- spin_lock_bh(&iop_chan->lock);
- list_for_each_entry_safe(iter, _iter, &iop_chan->chain,
- chain_node) {
- in_use_descs++;
- list_del(&iter->chain_node);
- }
- list_for_each_entry_safe_reverse(
- iter, _iter, &iop_chan->all_slots, slot_node) {
- list_del(&iter->slot_node);
- kfree(iter);
- iop_chan->slots_allocated--;
- }
- iop_chan->last_used = NULL;
-
- dev_dbg(iop_chan->device->common.dev, "%s slots_allocated %d\n",
- __func__, iop_chan->slots_allocated);
- spin_unlock_bh(&iop_chan->lock);
-
- /* one is ok since we left it on there on purpose */
- if (in_use_descs > 1)
- printk(KERN_ERR "IOP: Freeing %d in use descriptors!\n",
- in_use_descs - 1);
-}
-
-/**
- * iop_adma_status - poll the status of an ADMA transaction
- * @chan: ADMA channel handle
- * @cookie: ADMA transaction identifier
- * @txstate: a holder for the current state of the channel or NULL
- */
-static enum dma_status iop_adma_status(struct dma_chan *chan,
- dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
- int ret;
-
- ret = dma_cookie_status(chan, cookie, txstate);
- if (ret == DMA_COMPLETE)
- return ret;
-
- iop_adma_slot_cleanup(iop_chan);
-
- return dma_cookie_status(chan, cookie, txstate);
-}
-
-static irqreturn_t iop_adma_eot_handler(int irq, void *data)
-{
- struct iop_adma_chan *chan = data;
-
- dev_dbg(chan->device->common.dev, "%s\n", __func__);
-
- tasklet_schedule(&chan->irq_tasklet);
-
- iop_adma_device_clear_eot_status(chan);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t iop_adma_eoc_handler(int irq, void *data)
-{
- struct iop_adma_chan *chan = data;
-
- dev_dbg(chan->device->common.dev, "%s\n", __func__);
-
- tasklet_schedule(&chan->irq_tasklet);
-
- iop_adma_device_clear_eoc_status(chan);
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t iop_adma_err_handler(int irq, void *data)
-{
- struct iop_adma_chan *chan = data;
- unsigned long status = iop_chan_get_status(chan);
-
- dev_err(chan->device->common.dev,
- "error ( %s%s%s%s%s%s%s)\n",
- iop_is_err_int_parity(status, chan) ? "int_parity " : "",
- iop_is_err_mcu_abort(status, chan) ? "mcu_abort " : "",
- iop_is_err_int_tabort(status, chan) ? "int_tabort " : "",
- iop_is_err_int_mabort(status, chan) ? "int_mabort " : "",
- iop_is_err_pci_tabort(status, chan) ? "pci_tabort " : "",
- iop_is_err_pci_mabort(status, chan) ? "pci_mabort " : "",
- iop_is_err_split_tx(status, chan) ? "split_tx " : "");
-
- iop_adma_device_clear_err_status(chan);
-
- BUG();
-
- return IRQ_HANDLED;
-}
-
-static void iop_adma_issue_pending(struct dma_chan *chan)
-{
- struct iop_adma_chan *iop_chan = to_iop_adma_chan(chan);
-
- if (iop_chan->pending) {
- iop_chan->pending = 0;
- iop_chan_append(iop_chan);
- }
-}
-
-/*
- * Perform a transaction to verify the HW works.
- */
-#define IOP_ADMA_TEST_SIZE 2000
-
-static int iop_adma_memcpy_self_test(struct iop_adma_device *device)
-{
- int i;
- void *src, *dest;
- dma_addr_t src_dma, dest_dma;
- struct dma_chan *dma_chan;
- dma_cookie_t cookie;
- struct dma_async_tx_descriptor *tx;
- int err = 0;
- struct iop_adma_chan *iop_chan;
-
- dev_dbg(device->common.dev, "%s\n", __func__);
-
- src = kmalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL);
- if (!src)
- return -ENOMEM;
- dest = kzalloc(IOP_ADMA_TEST_SIZE, GFP_KERNEL);
- if (!dest) {
- kfree(src);
- return -ENOMEM;
- }
-
- /* Fill in src buffer */
- for (i = 0; i < IOP_ADMA_TEST_SIZE; i++)
- ((u8 *) src)[i] = (u8)i;
-
- /* Start copy, using first DMA channel */
- dma_chan = container_of(device->common.channels.next,
- struct dma_chan,
- device_node);
- if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
- err = -ENODEV;
- goto out;
- }
-
- dest_dma = dma_map_single(dma_chan->device->dev, dest,
- IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE);
- src_dma = dma_map_single(dma_chan->device->dev, src,
- IOP_ADMA_TEST_SIZE, DMA_TO_DEVICE);
- tx = iop_adma_prep_dma_memcpy(dma_chan, dest_dma, src_dma,
- IOP_ADMA_TEST_SIZE,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(1);
-
- if (iop_adma_status(dma_chan, cookie, NULL) !=
- DMA_COMPLETE) {
- dev_err(dma_chan->device->dev,
- "Self-test copy timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- iop_chan = to_iop_adma_chan(dma_chan);
- dma_sync_single_for_cpu(&iop_chan->device->pdev->dev, dest_dma,
- IOP_ADMA_TEST_SIZE, DMA_FROM_DEVICE);
- if (memcmp(src, dest, IOP_ADMA_TEST_SIZE)) {
- dev_err(dma_chan->device->dev,
- "Self-test copy failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
-free_resources:
- iop_adma_free_chan_resources(dma_chan);
-out:
- kfree(src);
- kfree(dest);
- return err;
-}
-
-#define IOP_ADMA_NUM_SRC_TEST 4 /* must be <= 15 */
-static int
-iop_adma_xor_val_self_test(struct iop_adma_device *device)
-{
- int i, src_idx;
- struct page *dest;
- struct page *xor_srcs[IOP_ADMA_NUM_SRC_TEST];
- struct page *zero_sum_srcs[IOP_ADMA_NUM_SRC_TEST + 1];
- dma_addr_t dma_srcs[IOP_ADMA_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 zero_sum_result;
- int err = 0;
- struct iop_adma_chan *iop_chan;
-
- dev_dbg(device->common.dev, "%s\n", __func__);
-
- for (src_idx = 0; src_idx < IOP_ADMA_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 < IOP_ADMA_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 < IOP_ADMA_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(device->common.channels.next,
- struct dma_chan,
- device_node);
- if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
- err = -ENODEV;
- goto out;
- }
-
- /* test xor */
- dest_dma = dma_map_page(dma_chan->device->dev, dest, 0,
- PAGE_SIZE, DMA_FROM_DEVICE);
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
- dma_srcs[i] = dma_map_page(dma_chan->device->dev, xor_srcs[i],
- 0, PAGE_SIZE, DMA_TO_DEVICE);
- tx = iop_adma_prep_dma_xor(dma_chan, dest_dma, dma_srcs,
- IOP_ADMA_NUM_SRC_TEST, PAGE_SIZE,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) !=
- DMA_COMPLETE) {
- dev_err(dma_chan->device->dev,
- "Self-test xor timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- iop_chan = to_iop_adma_chan(dma_chan);
- dma_sync_single_for_cpu(&iop_chan->device->pdev->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(dma_chan->device->dev,
- "Self-test xor failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
- }
- dma_sync_single_for_device(&iop_chan->device->pdev->dev, dest_dma,
- PAGE_SIZE, DMA_TO_DEVICE);
-
- /* skip zero sum if the capability is not present */
- if (!dma_has_cap(DMA_XOR_VAL, dma_chan->device->cap_mask))
- goto free_resources;
-
- /* zero sum the sources with the destintation page */
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
- zero_sum_srcs[i] = xor_srcs[i];
- zero_sum_srcs[i] = dest;
-
- zero_sum_result = 1;
-
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++)
- dma_srcs[i] = dma_map_page(dma_chan->device->dev,
- zero_sum_srcs[i], 0, PAGE_SIZE,
- DMA_TO_DEVICE);
- tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs,
- IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE,
- &zero_sum_result,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
- dev_err(dma_chan->device->dev,
- "Self-test zero sum timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- if (zero_sum_result != 0) {
- dev_err(dma_chan->device->dev,
- "Self-test zero sum failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- /* test for non-zero parity sum */
- zero_sum_result = 0;
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 1; i++)
- dma_srcs[i] = dma_map_page(dma_chan->device->dev,
- zero_sum_srcs[i], 0, PAGE_SIZE,
- DMA_TO_DEVICE);
- tx = iop_adma_prep_dma_xor_val(dma_chan, dma_srcs,
- IOP_ADMA_NUM_SRC_TEST + 1, PAGE_SIZE,
- &zero_sum_result,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) != DMA_COMPLETE) {
- dev_err(dma_chan->device->dev,
- "Self-test non-zero sum timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- if (zero_sum_result != 1) {
- dev_err(dma_chan->device->dev,
- "Self-test non-zero sum failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
-free_resources:
- iop_adma_free_chan_resources(dma_chan);
-out:
- src_idx = IOP_ADMA_NUM_SRC_TEST;
- while (src_idx--)
- __free_page(xor_srcs[src_idx]);
- __free_page(dest);
- return err;
-}
-
-#ifdef CONFIG_RAID6_PQ
-static int
-iop_adma_pq_zero_sum_self_test(struct iop_adma_device *device)
-{
- /* combined sources, software pq results, and extra hw pq results */
- struct page *pq[IOP_ADMA_NUM_SRC_TEST+2+2];
- /* ptr to the extra hw pq buffers defined above */
- struct page **pq_hw = &pq[IOP_ADMA_NUM_SRC_TEST+2];
- /* address conversion buffers (dma_map / page_address) */
- void *pq_sw[IOP_ADMA_NUM_SRC_TEST+2];
- dma_addr_t pq_src[IOP_ADMA_NUM_SRC_TEST+2];
- dma_addr_t *pq_dest = &pq_src[IOP_ADMA_NUM_SRC_TEST];
-
- int i;
- struct dma_async_tx_descriptor *tx;
- struct dma_chan *dma_chan;
- dma_cookie_t cookie;
- u32 zero_sum_result;
- int err = 0;
- struct device *dev;
-
- dev_dbg(device->common.dev, "%s\n", __func__);
-
- for (i = 0; i < ARRAY_SIZE(pq); i++) {
- pq[i] = alloc_page(GFP_KERNEL);
- if (!pq[i]) {
- while (i--)
- __free_page(pq[i]);
- return -ENOMEM;
- }
- }
-
- /* Fill in src buffers */
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++) {
- pq_sw[i] = page_address(pq[i]);
- memset(pq_sw[i], 0x11111111 * (1<<i), PAGE_SIZE);
- }
- pq_sw[i] = page_address(pq[i]);
- pq_sw[i+1] = page_address(pq[i+1]);
-
- dma_chan = container_of(device->common.channels.next,
- struct dma_chan,
- device_node);
- if (iop_adma_alloc_chan_resources(dma_chan) < 1) {
- err = -ENODEV;
- goto out;
- }
-
- dev = dma_chan->device->dev;
-
- /* initialize the dests */
- memset(page_address(pq_hw[0]), 0 , PAGE_SIZE);
- memset(page_address(pq_hw[1]), 0 , PAGE_SIZE);
-
- /* test pq */
- pq_dest[0] = dma_map_page(dev, pq_hw[0], 0, PAGE_SIZE, DMA_FROM_DEVICE);
- pq_dest[1] = dma_map_page(dev, pq_hw[1], 0, PAGE_SIZE, DMA_FROM_DEVICE);
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST; i++)
- pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
- DMA_TO_DEVICE);
-
- tx = iop_adma_prep_dma_pq(dma_chan, pq_dest, pq_src,
- IOP_ADMA_NUM_SRC_TEST, (u8 *)raid6_gfexp,
- PAGE_SIZE,
- DMA_PREP_INTERRUPT |
- DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) !=
- DMA_COMPLETE) {
- dev_err(dev, "Self-test pq timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- raid6_call.gen_syndrome(IOP_ADMA_NUM_SRC_TEST+2, PAGE_SIZE, pq_sw);
-
- if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST],
- page_address(pq_hw[0]), PAGE_SIZE) != 0) {
- dev_err(dev, "Self-test p failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
- if (memcmp(pq_sw[IOP_ADMA_NUM_SRC_TEST+1],
- page_address(pq_hw[1]), PAGE_SIZE) != 0) {
- dev_err(dev, "Self-test q failed compare, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- /* test correct zero sum using the software generated pq values */
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++)
- pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
- DMA_TO_DEVICE);
-
- zero_sum_result = ~0;
- tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST],
- pq_src, IOP_ADMA_NUM_SRC_TEST,
- raid6_gfexp, PAGE_SIZE, &zero_sum_result,
- DMA_PREP_INTERRUPT|DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) !=
- DMA_COMPLETE) {
- dev_err(dev, "Self-test pq-zero-sum timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- if (zero_sum_result != 0) {
- dev_err(dev, "Self-test pq-zero-sum failed to validate: %x\n",
- zero_sum_result);
- err = -ENODEV;
- goto free_resources;
- }
-
- /* test incorrect zero sum */
- i = IOP_ADMA_NUM_SRC_TEST;
- memset(pq_sw[i] + 100, 0, 100);
- memset(pq_sw[i+1] + 200, 0, 200);
- for (i = 0; i < IOP_ADMA_NUM_SRC_TEST + 2; i++)
- pq_src[i] = dma_map_page(dev, pq[i], 0, PAGE_SIZE,
- DMA_TO_DEVICE);
-
- zero_sum_result = 0;
- tx = iop_adma_prep_dma_pq_val(dma_chan, &pq_src[IOP_ADMA_NUM_SRC_TEST],
- pq_src, IOP_ADMA_NUM_SRC_TEST,
- raid6_gfexp, PAGE_SIZE, &zero_sum_result,
- DMA_PREP_INTERRUPT|DMA_CTRL_ACK);
-
- cookie = iop_adma_tx_submit(tx);
- iop_adma_issue_pending(dma_chan);
- msleep(8);
-
- if (iop_adma_status(dma_chan, cookie, NULL) !=
- DMA_COMPLETE) {
- dev_err(dev, "Self-test !pq-zero-sum timed out, disabling\n");
- err = -ENODEV;
- goto free_resources;
- }
-
- if (zero_sum_result != (SUM_CHECK_P_RESULT | SUM_CHECK_Q_RESULT)) {
- dev_err(dev, "Self-test !pq-zero-sum failed to validate: %x\n",
- zero_sum_result);
- err = -ENODEV;
- goto free_resources;
- }
-
-free_resources:
- iop_adma_free_chan_resources(dma_chan);
-out:
- i = ARRAY_SIZE(pq);
- while (i--)
- __free_page(pq[i]);
- return err;
-}
-#endif
-
-static int iop_adma_remove(struct platform_device *dev)
-{
- struct iop_adma_device *device = platform_get_drvdata(dev);
- struct dma_chan *chan, *_chan;
- struct iop_adma_chan *iop_chan;
- struct iop_adma_platform_data *plat_data = dev_get_platdata(&dev->dev);
-
- dma_async_device_unregister(&device->common);
-
- dma_free_coherent(&dev->dev, plat_data->pool_size,
- device->dma_desc_pool_virt, device->dma_desc_pool);
-
- list_for_each_entry_safe(chan, _chan, &device->common.channels,
- device_node) {
- iop_chan = to_iop_adma_chan(chan);
- list_del(&chan->device_node);
- kfree(iop_chan);
- }
- kfree(device);
-
- return 0;
-}
-
-static int iop_adma_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int ret = 0, i;
- struct iop_adma_device *adev;
- struct iop_adma_chan *iop_chan;
- struct dma_device *dma_dev;
- struct iop_adma_platform_data *plat_data = dev_get_platdata(&pdev->dev);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), pdev->name))
- return -EBUSY;
-
- adev = kzalloc(sizeof(*adev), GFP_KERNEL);
- if (!adev)
- return -ENOMEM;
- dma_dev = &adev->common;
-
- /* allocate coherent memory for hardware descriptors
- * note: writecombine gives slightly better performance, but
- * requires that we explicitly flush the writes
- */
- adev->dma_desc_pool_virt = dma_alloc_wc(&pdev->dev,
- plat_data->pool_size,
- &adev->dma_desc_pool,
- GFP_KERNEL);
- if (!adev->dma_desc_pool_virt) {
- ret = -ENOMEM;
- goto err_free_adev;
- }
-
- dev_dbg(&pdev->dev, "%s: allocated descriptor pool virt %p phys %pad\n",
- __func__, adev->dma_desc_pool_virt, &adev->dma_desc_pool);
-
- adev->id = plat_data->hw_id;
-
- /* discover transaction capabilites from the platform data */
- dma_dev->cap_mask = plat_data->cap_mask;
-
- adev->pdev = pdev;
- platform_set_drvdata(pdev, adev);
-
- INIT_LIST_HEAD(&dma_dev->channels);
-
- /* set base routines */
- dma_dev->device_alloc_chan_resources = iop_adma_alloc_chan_resources;
- dma_dev->device_free_chan_resources = iop_adma_free_chan_resources;
- dma_dev->device_tx_status = iop_adma_status;
- dma_dev->device_issue_pending = iop_adma_issue_pending;
- dma_dev->dev = &pdev->dev;
-
- /* set prep routines based on capability */
- if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask))
- dma_dev->device_prep_dma_memcpy = iop_adma_prep_dma_memcpy;
- if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
- dma_dev->max_xor = iop_adma_get_max_xor();
- dma_dev->device_prep_dma_xor = iop_adma_prep_dma_xor;
- }
- if (dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask))
- dma_dev->device_prep_dma_xor_val =
- iop_adma_prep_dma_xor_val;
- if (dma_has_cap(DMA_PQ, dma_dev->cap_mask)) {
- dma_set_maxpq(dma_dev, iop_adma_get_max_pq(), 0);
- dma_dev->device_prep_dma_pq = iop_adma_prep_dma_pq;
- }
- if (dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask))
- dma_dev->device_prep_dma_pq_val =
- iop_adma_prep_dma_pq_val;
- if (dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask))
- dma_dev->device_prep_dma_interrupt =
- iop_adma_prep_dma_interrupt;
-
- iop_chan = kzalloc(sizeof(*iop_chan), GFP_KERNEL);
- if (!iop_chan) {
- ret = -ENOMEM;
- goto err_free_dma;
- }
- iop_chan->device = adev;
-
- iop_chan->mmr_base = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!iop_chan->mmr_base) {
- ret = -ENOMEM;
- goto err_free_iop_chan;
- }
- tasklet_setup(&iop_chan->irq_tasklet, iop_adma_tasklet);
-
- /* clear errors before enabling interrupts */
- iop_adma_device_clear_err_status(iop_chan);
-
- for (i = 0; i < 3; i++) {
- static const irq_handler_t handler[] = {
- iop_adma_eot_handler,
- iop_adma_eoc_handler,
- iop_adma_err_handler
- };
- int irq = platform_get_irq(pdev, i);
- if (irq < 0) {
- ret = -ENXIO;
- goto err_free_iop_chan;
- } else {
- ret = devm_request_irq(&pdev->dev, irq,
- handler[i], 0, pdev->name, iop_chan);
- if (ret)
- goto err_free_iop_chan;
- }
- }
-
- spin_lock_init(&iop_chan->lock);
- INIT_LIST_HEAD(&iop_chan->chain);
- INIT_LIST_HEAD(&iop_chan->all_slots);
- iop_chan->common.device = dma_dev;
- dma_cookie_init(&iop_chan->common);
- list_add_tail(&iop_chan->common.device_node, &dma_dev->channels);
-
- if (dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask)) {
- ret = iop_adma_memcpy_self_test(adev);
- dev_dbg(&pdev->dev, "memcpy self test returned %d\n", ret);
- if (ret)
- goto err_free_iop_chan;
- }
-
- if (dma_has_cap(DMA_XOR, dma_dev->cap_mask)) {
- ret = iop_adma_xor_val_self_test(adev);
- dev_dbg(&pdev->dev, "xor self test returned %d\n", ret);
- if (ret)
- goto err_free_iop_chan;
- }
-
- if (dma_has_cap(DMA_PQ, dma_dev->cap_mask) &&
- dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask)) {
- #ifdef CONFIG_RAID6_PQ
- ret = iop_adma_pq_zero_sum_self_test(adev);
- dev_dbg(&pdev->dev, "pq self test returned %d\n", ret);
- #else
- /* can not test raid6, so do not publish capability */
- dma_cap_clear(DMA_PQ, dma_dev->cap_mask);
- dma_cap_clear(DMA_PQ_VAL, dma_dev->cap_mask);
- ret = 0;
- #endif
- if (ret)
- goto err_free_iop_chan;
- }
-
- dev_info(&pdev->dev, "Intel(R) IOP: ( %s%s%s%s%s%s)\n",
- dma_has_cap(DMA_PQ, dma_dev->cap_mask) ? "pq " : "",
- dma_has_cap(DMA_PQ_VAL, dma_dev->cap_mask) ? "pq_val " : "",
- dma_has_cap(DMA_XOR, dma_dev->cap_mask) ? "xor " : "",
- dma_has_cap(DMA_XOR_VAL, dma_dev->cap_mask) ? "xor_val " : "",
- dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
- dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
-
- dma_async_device_register(dma_dev);
- goto out;
-
- err_free_iop_chan:
- kfree(iop_chan);
- err_free_dma:
- dma_free_coherent(&adev->pdev->dev, plat_data->pool_size,
- adev->dma_desc_pool_virt, adev->dma_desc_pool);
- err_free_adev:
- kfree(adev);
- out:
- return ret;
-}
-
-static void iop_chan_start_null_memcpy(struct iop_adma_chan *iop_chan)
-{
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- dma_cookie_t cookie;
- int slot_cnt, slots_per_op;
-
- dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_memcpy_slot_count(0, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
-
- list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
- async_tx_ack(&sw_desc->async_tx);
- iop_desc_init_memcpy(grp_start, 0);
- iop_desc_set_byte_count(grp_start, iop_chan, 0);
- iop_desc_set_dest_addr(grp_start, iop_chan, 0);
- iop_desc_set_memcpy_src_addr(grp_start, 0);
-
- cookie = dma_cookie_assign(&sw_desc->async_tx);
-
- /* initialize the completed cookie to be less than
- * the most recently used cookie
- */
- iop_chan->common.completed_cookie = cookie - 1;
-
- /* channel should not be busy */
- BUG_ON(iop_chan_is_busy(iop_chan));
-
- /* clear any prior error-status bits */
- iop_adma_device_clear_err_status(iop_chan);
-
- /* disable operation */
- iop_chan_disable(iop_chan);
-
- /* set the descriptor address */
- iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys);
-
- /* 1/ don't add pre-chained descriptors
- * 2/ dummy read to flush next_desc write
- */
- BUG_ON(iop_desc_get_next_desc(sw_desc));
-
- /* run the descriptor */
- iop_chan_enable(iop_chan);
- } else
- dev_err(iop_chan->device->common.dev,
- "failed to allocate null descriptor\n");
- spin_unlock_bh(&iop_chan->lock);
-}
-
-static void iop_chan_start_null_xor(struct iop_adma_chan *iop_chan)
-{
- struct iop_adma_desc_slot *sw_desc, *grp_start;
- dma_cookie_t cookie;
- int slot_cnt, slots_per_op;
-
- dev_dbg(iop_chan->device->common.dev, "%s\n", __func__);
-
- spin_lock_bh(&iop_chan->lock);
- slot_cnt = iop_chan_xor_slot_count(0, 2, &slots_per_op);
- sw_desc = iop_adma_alloc_slots(iop_chan, slot_cnt, slots_per_op);
- if (sw_desc) {
- grp_start = sw_desc->group_head;
- list_splice_init(&sw_desc->tx_list, &iop_chan->chain);
- async_tx_ack(&sw_desc->async_tx);
- iop_desc_init_null_xor(grp_start, 2, 0);
- iop_desc_set_byte_count(grp_start, iop_chan, 0);
- iop_desc_set_dest_addr(grp_start, iop_chan, 0);
- iop_desc_set_xor_src_addr(grp_start, 0, 0);
- iop_desc_set_xor_src_addr(grp_start, 1, 0);
-
- cookie = dma_cookie_assign(&sw_desc->async_tx);
-
- /* initialize the completed cookie to be less than
- * the most recently used cookie
- */
- iop_chan->common.completed_cookie = cookie - 1;
-
- /* channel should not be busy */
- BUG_ON(iop_chan_is_busy(iop_chan));
-
- /* clear any prior error-status bits */
- iop_adma_device_clear_err_status(iop_chan);
-
- /* disable operation */
- iop_chan_disable(iop_chan);
-
- /* set the descriptor address */
- iop_chan_set_next_descriptor(iop_chan, sw_desc->async_tx.phys);
-
- /* 1/ don't add pre-chained descriptors
- * 2/ dummy read to flush next_desc write
- */
- BUG_ON(iop_desc_get_next_desc(sw_desc));
-
- /* run the descriptor */
- iop_chan_enable(iop_chan);
- } else
- dev_err(iop_chan->device->common.dev,
- "failed to allocate null descriptor\n");
- spin_unlock_bh(&iop_chan->lock);
-}
-
-static struct platform_driver iop_adma_driver = {
- .probe = iop_adma_probe,
- .remove = iop_adma_remove,
- .driver = {
- .name = "iop-adma",
- },
-};
-
-module_platform_driver(iop_adma_driver);
-
-MODULE_AUTHOR("Intel Corporation");
-MODULE_DESCRIPTION("IOP ADMA Engine Driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:iop-adma");
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright © 2006, Intel Corporation.
- */
-#ifndef _ADMA_H
-#define _ADMA_H
-#include <linux/types.h>
-#include <linux/io.h>
-#include <linux/platform_data/dma-iop32x.h>
-
-/* Memory copy units */
-#define DMA_CCR(chan) (chan->mmr_base + 0x0)
-#define DMA_CSR(chan) (chan->mmr_base + 0x4)
-#define DMA_DAR(chan) (chan->mmr_base + 0xc)
-#define DMA_NDAR(chan) (chan->mmr_base + 0x10)
-#define DMA_PADR(chan) (chan->mmr_base + 0x14)
-#define DMA_PUADR(chan) (chan->mmr_base + 0x18)
-#define DMA_LADR(chan) (chan->mmr_base + 0x1c)
-#define DMA_BCR(chan) (chan->mmr_base + 0x20)
-#define DMA_DCR(chan) (chan->mmr_base + 0x24)
-
-/* Application accelerator unit */
-#define AAU_ACR(chan) (chan->mmr_base + 0x0)
-#define AAU_ASR(chan) (chan->mmr_base + 0x4)
-#define AAU_ADAR(chan) (chan->mmr_base + 0x8)
-#define AAU_ANDAR(chan) (chan->mmr_base + 0xc)
-#define AAU_SAR(src, chan) (chan->mmr_base + (0x10 + ((src) << 2)))
-#define AAU_DAR(chan) (chan->mmr_base + 0x20)
-#define AAU_ABCR(chan) (chan->mmr_base + 0x24)
-#define AAU_ADCR(chan) (chan->mmr_base + 0x28)
-#define AAU_SAR_EDCR(src_edc) (chan->mmr_base + (0x02c + ((src_edc-4) << 2)))
-#define AAU_EDCR0_IDX 8
-#define AAU_EDCR1_IDX 17
-#define AAU_EDCR2_IDX 26
-
-struct iop3xx_aau_desc_ctrl {
- unsigned int int_en:1;
- unsigned int blk1_cmd_ctrl:3;
- unsigned int blk2_cmd_ctrl:3;
- unsigned int blk3_cmd_ctrl:3;
- unsigned int blk4_cmd_ctrl:3;
- unsigned int blk5_cmd_ctrl:3;
- unsigned int blk6_cmd_ctrl:3;
- unsigned int blk7_cmd_ctrl:3;
- unsigned int blk8_cmd_ctrl:3;
- unsigned int blk_ctrl:2;
- unsigned int dual_xor_en:1;
- unsigned int tx_complete:1;
- unsigned int zero_result_err:1;
- unsigned int zero_result_en:1;
- unsigned int dest_write_en:1;
-};
-
-struct iop3xx_aau_e_desc_ctrl {
- unsigned int reserved:1;
- unsigned int blk1_cmd_ctrl:3;
- unsigned int blk2_cmd_ctrl:3;
- unsigned int blk3_cmd_ctrl:3;
- unsigned int blk4_cmd_ctrl:3;
- unsigned int blk5_cmd_ctrl:3;
- unsigned int blk6_cmd_ctrl:3;
- unsigned int blk7_cmd_ctrl:3;
- unsigned int blk8_cmd_ctrl:3;
- unsigned int reserved2:7;
-};
-
-struct iop3xx_dma_desc_ctrl {
- unsigned int pci_transaction:4;
- unsigned int int_en:1;
- unsigned int dac_cycle_en:1;
- unsigned int mem_to_mem_en:1;
- unsigned int crc_data_tx_en:1;
- unsigned int crc_gen_en:1;
- unsigned int crc_seed_dis:1;
- unsigned int reserved:21;
- unsigned int crc_tx_complete:1;
-};
-
-struct iop3xx_desc_dma {
- u32 next_desc;
- union {
- u32 pci_src_addr;
- u32 pci_dest_addr;
- u32 src_addr;
- };
- union {
- u32 upper_pci_src_addr;
- u32 upper_pci_dest_addr;
- };
- union {
- u32 local_pci_src_addr;
- u32 local_pci_dest_addr;
- u32 dest_addr;
- };
- u32 byte_count;
- union {
- u32 desc_ctrl;
- struct iop3xx_dma_desc_ctrl desc_ctrl_field;
- };
- u32 crc_addr;
-};
-
-struct iop3xx_desc_aau {
- u32 next_desc;
- u32 src[4];
- u32 dest_addr;
- u32 byte_count;
- union {
- u32 desc_ctrl;
- struct iop3xx_aau_desc_ctrl desc_ctrl_field;
- };
- union {
- u32 src_addr;
- u32 e_desc_ctrl;
- struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
- } src_edc[31];
-};
-
-struct iop3xx_aau_gfmr {
- unsigned int gfmr1:8;
- unsigned int gfmr2:8;
- unsigned int gfmr3:8;
- unsigned int gfmr4:8;
-};
-
-struct iop3xx_desc_pq_xor {
- u32 next_desc;
- u32 src[3];
- union {
- u32 data_mult1;
- struct iop3xx_aau_gfmr data_mult1_field;
- };
- u32 dest_addr;
- u32 byte_count;
- union {
- u32 desc_ctrl;
- struct iop3xx_aau_desc_ctrl desc_ctrl_field;
- };
- union {
- u32 src_addr;
- u32 e_desc_ctrl;
- struct iop3xx_aau_e_desc_ctrl e_desc_ctrl_field;
- u32 data_multiplier;
- struct iop3xx_aau_gfmr data_mult_field;
- u32 reserved;
- } src_edc_gfmr[19];
-};
-
-struct iop3xx_desc_dual_xor {
- u32 next_desc;
- u32 src0_addr;
- u32 src1_addr;
- u32 h_src_addr;
- u32 d_src_addr;
- u32 h_dest_addr;
- u32 byte_count;
- union {
- u32 desc_ctrl;
- struct iop3xx_aau_desc_ctrl desc_ctrl_field;
- };
- u32 d_dest_addr;
-};
-
-union iop3xx_desc {
- struct iop3xx_desc_aau *aau;
- struct iop3xx_desc_dma *dma;
- struct iop3xx_desc_pq_xor *pq_xor;
- struct iop3xx_desc_dual_xor *dual_xor;
- void *ptr;
-};
-
-/* No support for p+q operations */
-static inline int
-iop_chan_pq_slot_count(size_t len, int src_cnt, int *slots_per_op)
-{
- BUG();
- return 0;
-}
-
-static inline void
-iop_desc_init_pq(struct iop_adma_desc_slot *desc, int src_cnt,
- unsigned long flags)
-{
- BUG();
-}
-
-static inline void
-iop_desc_set_pq_addr(struct iop_adma_desc_slot *desc, dma_addr_t *addr)
-{
- BUG();
-}
-
-static inline void
-iop_desc_set_pq_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
- dma_addr_t addr, unsigned char coef)
-{
- BUG();
-}
-
-static inline int
-iop_chan_pq_zero_sum_slot_count(size_t len, int src_cnt, int *slots_per_op)
-{
- BUG();
- return 0;
-}
-
-static inline void
-iop_desc_init_pq_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
- unsigned long flags)
-{
- BUG();
-}
-
-static inline void
-iop_desc_set_pq_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
-{
- BUG();
-}
-
-#define iop_desc_set_pq_zero_sum_src_addr iop_desc_set_pq_src_addr
-
-static inline void
-iop_desc_set_pq_zero_sum_addr(struct iop_adma_desc_slot *desc, int pq_idx,
- dma_addr_t *src)
-{
- BUG();
-}
-
-static inline int iop_adma_get_max_xor(void)
-{
- return 32;
-}
-
-static inline int iop_adma_get_max_pq(void)
-{
- BUG();
- return 0;
-}
-
-static inline u32 iop_chan_get_current_descriptor(struct iop_adma_chan *chan)
-{
- int id = chan->device->id;
-
- switch (id) {
- case DMA0_ID:
- case DMA1_ID:
- return __raw_readl(DMA_DAR(chan));
- case AAU_ID:
- return __raw_readl(AAU_ADAR(chan));
- default:
- BUG();
- }
- return 0;
-}
-
-static inline void iop_chan_set_next_descriptor(struct iop_adma_chan *chan,
- u32 next_desc_addr)
-{
- int id = chan->device->id;
-
- switch (id) {
- case DMA0_ID:
- case DMA1_ID:
- __raw_writel(next_desc_addr, DMA_NDAR(chan));
- break;
- case AAU_ID:
- __raw_writel(next_desc_addr, AAU_ANDAR(chan));
- break;
- }
-
-}
-
-#define IOP_ADMA_STATUS_BUSY (1 << 10)
-#define IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT (1024)
-#define IOP_ADMA_XOR_MAX_BYTE_COUNT (16 * 1024 * 1024)
-#define IOP_ADMA_MAX_BYTE_COUNT (16 * 1024 * 1024)
-
-static inline int iop_chan_is_busy(struct iop_adma_chan *chan)
-{
- u32 status = __raw_readl(DMA_CSR(chan));
- return (status & IOP_ADMA_STATUS_BUSY) ? 1 : 0;
-}
-
-static inline int iop_desc_is_aligned(struct iop_adma_desc_slot *desc,
- int num_slots)
-{
- /* num_slots will only ever be 1, 2, 4, or 8 */
- return (desc->idx & (num_slots - 1)) ? 0 : 1;
-}
-
-/* to do: support large (i.e. > hw max) buffer sizes */
-static inline int iop_chan_memcpy_slot_count(size_t len, int *slots_per_op)
-{
- *slots_per_op = 1;
- return 1;
-}
-
-/* to do: support large (i.e. > hw max) buffer sizes */
-static inline int iop_chan_memset_slot_count(size_t len, int *slots_per_op)
-{
- *slots_per_op = 1;
- return 1;
-}
-
-static inline int iop3xx_aau_xor_slot_count(size_t len, int src_cnt,
- int *slots_per_op)
-{
- static const char slot_count_table[] = {
- 1, 1, 1, 1, /* 01 - 04 */
- 2, 2, 2, 2, /* 05 - 08 */
- 4, 4, 4, 4, /* 09 - 12 */
- 4, 4, 4, 4, /* 13 - 16 */
- 8, 8, 8, 8, /* 17 - 20 */
- 8, 8, 8, 8, /* 21 - 24 */
- 8, 8, 8, 8, /* 25 - 28 */
- 8, 8, 8, 8, /* 29 - 32 */
- };
- *slots_per_op = slot_count_table[src_cnt - 1];
- return *slots_per_op;
-}
-
-static inline int
-iop_chan_interrupt_slot_count(int *slots_per_op, struct iop_adma_chan *chan)
-{
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return iop_chan_memcpy_slot_count(0, slots_per_op);
- case AAU_ID:
- return iop3xx_aau_xor_slot_count(0, 2, slots_per_op);
- default:
- BUG();
- }
- return 0;
-}
-
-static inline int iop_chan_xor_slot_count(size_t len, int src_cnt,
- int *slots_per_op)
-{
- int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
-
- if (len <= IOP_ADMA_XOR_MAX_BYTE_COUNT)
- return slot_cnt;
-
- len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
- while (len > IOP_ADMA_XOR_MAX_BYTE_COUNT) {
- len -= IOP_ADMA_XOR_MAX_BYTE_COUNT;
- slot_cnt += *slots_per_op;
- }
-
- slot_cnt += *slots_per_op;
-
- return slot_cnt;
-}
-
-/* zero sum on iop3xx is limited to 1k at a time so it requires multiple
- * descriptors
- */
-static inline int iop_chan_zero_sum_slot_count(size_t len, int src_cnt,
- int *slots_per_op)
-{
- int slot_cnt = iop3xx_aau_xor_slot_count(len, src_cnt, slots_per_op);
-
- if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT)
- return slot_cnt;
-
- len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
- while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
- len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
- slot_cnt += *slots_per_op;
- }
-
- slot_cnt += *slots_per_op;
-
- return slot_cnt;
-}
-
-static inline u32 iop_desc_get_byte_count(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *chan)
-{
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return hw_desc.dma->byte_count;
- case AAU_ID:
- return hw_desc.aau->byte_count;
- default:
- BUG();
- }
- return 0;
-}
-
-/* translate the src_idx to a descriptor word index */
-static inline int __desc_idx(int src_idx)
-{
- static const int desc_idx_table[] = { 0, 0, 0, 0,
- 0, 1, 2, 3,
- 5, 6, 7, 8,
- 9, 10, 11, 12,
- 14, 15, 16, 17,
- 18, 19, 20, 21,
- 23, 24, 25, 26,
- 27, 28, 29, 30,
- };
-
- return desc_idx_table[src_idx];
-}
-
-static inline u32 iop_desc_get_src_addr(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *chan,
- int src_idx)
-{
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return hw_desc.dma->src_addr;
- case AAU_ID:
- break;
- default:
- BUG();
- }
-
- if (src_idx < 4)
- return hw_desc.aau->src[src_idx];
- else
- return hw_desc.aau->src_edc[__desc_idx(src_idx)].src_addr;
-}
-
-static inline void iop3xx_aau_desc_set_src_addr(struct iop3xx_desc_aau *hw_desc,
- int src_idx, dma_addr_t addr)
-{
- if (src_idx < 4)
- hw_desc->src[src_idx] = addr;
- else
- hw_desc->src_edc[__desc_idx(src_idx)].src_addr = addr;
-}
-
-static inline void
-iop_desc_init_memcpy(struct iop_adma_desc_slot *desc, unsigned long flags)
-{
- struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
- union {
- u32 value;
- struct iop3xx_dma_desc_ctrl field;
- } u_desc_ctrl;
-
- u_desc_ctrl.value = 0;
- u_desc_ctrl.field.mem_to_mem_en = 1;
- u_desc_ctrl.field.pci_transaction = 0xe; /* memory read block */
- u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
- hw_desc->desc_ctrl = u_desc_ctrl.value;
- hw_desc->upper_pci_src_addr = 0;
- hw_desc->crc_addr = 0;
-}
-
-static inline void
-iop_desc_init_memset(struct iop_adma_desc_slot *desc, unsigned long flags)
-{
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
- union {
- u32 value;
- struct iop3xx_aau_desc_ctrl field;
- } u_desc_ctrl;
-
- u_desc_ctrl.value = 0;
- u_desc_ctrl.field.blk1_cmd_ctrl = 0x2; /* memory block fill */
- u_desc_ctrl.field.dest_write_en = 1;
- u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
- hw_desc->desc_ctrl = u_desc_ctrl.value;
-}
-
-static inline u32
-iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
- unsigned long flags)
-{
- int i, shift;
- u32 edcr;
- union {
- u32 value;
- struct iop3xx_aau_desc_ctrl field;
- } u_desc_ctrl;
-
- u_desc_ctrl.value = 0;
- switch (src_cnt) {
- case 25 ... 32:
- u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
- edcr = 0;
- shift = 1;
- for (i = 24; i < src_cnt; i++) {
- edcr |= (1 << shift);
- shift += 3;
- }
- hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = edcr;
- src_cnt = 24;
- fallthrough;
- case 17 ... 24:
- if (!u_desc_ctrl.field.blk_ctrl) {
- hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
- u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
- }
- edcr = 0;
- shift = 1;
- for (i = 16; i < src_cnt; i++) {
- edcr |= (1 << shift);
- shift += 3;
- }
- hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = edcr;
- src_cnt = 16;
- fallthrough;
- case 9 ... 16:
- if (!u_desc_ctrl.field.blk_ctrl)
- u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
- edcr = 0;
- shift = 1;
- for (i = 8; i < src_cnt; i++) {
- edcr |= (1 << shift);
- shift += 3;
- }
- hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = edcr;
- src_cnt = 8;
- fallthrough;
- case 2 ... 8:
- shift = 1;
- for (i = 0; i < src_cnt; i++) {
- u_desc_ctrl.value |= (1 << shift);
- shift += 3;
- }
-
- if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
- u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
- }
-
- u_desc_ctrl.field.dest_write_en = 1;
- u_desc_ctrl.field.blk1_cmd_ctrl = 0x7; /* direct fill */
- u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
- hw_desc->desc_ctrl = u_desc_ctrl.value;
-
- return u_desc_ctrl.value;
-}
-
-static inline void
-iop_desc_init_xor(struct iop_adma_desc_slot *desc, int src_cnt,
- unsigned long flags)
-{
- iop3xx_desc_init_xor(desc->hw_desc, src_cnt, flags);
-}
-
-/* return the number of operations */
-static inline int
-iop_desc_init_zero_sum(struct iop_adma_desc_slot *desc, int src_cnt,
- unsigned long flags)
-{
- int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
- struct iop3xx_desc_aau *hw_desc, *prev_hw_desc, *iter;
- union {
- u32 value;
- struct iop3xx_aau_desc_ctrl field;
- } u_desc_ctrl;
- int i, j;
-
- hw_desc = desc->hw_desc;
-
- for (i = 0, j = 0; (slot_cnt -= slots_per_op) >= 0;
- i += slots_per_op, j++) {
- iter = iop_hw_desc_slot_idx(hw_desc, i);
- u_desc_ctrl.value = iop3xx_desc_init_xor(iter, src_cnt, flags);
- u_desc_ctrl.field.dest_write_en = 0;
- u_desc_ctrl.field.zero_result_en = 1;
- u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
- iter->desc_ctrl = u_desc_ctrl.value;
-
- /* for the subsequent descriptors preserve the store queue
- * and chain them together
- */
- if (i) {
- prev_hw_desc =
- iop_hw_desc_slot_idx(hw_desc, i - slots_per_op);
- prev_hw_desc->next_desc =
- (u32) (desc->async_tx.phys + (i << 5));
- }
- }
-
- return j;
-}
-
-static inline void
-iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt,
- unsigned long flags)
-{
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
- union {
- u32 value;
- struct iop3xx_aau_desc_ctrl field;
- } u_desc_ctrl;
-
- u_desc_ctrl.value = 0;
- switch (src_cnt) {
- case 25 ... 32:
- u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
- hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
- fallthrough;
- case 17 ... 24:
- if (!u_desc_ctrl.field.blk_ctrl) {
- hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
- u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
- }
- hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = 0;
- fallthrough;
- case 9 ... 16:
- if (!u_desc_ctrl.field.blk_ctrl)
- u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
- hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = 0;
- fallthrough;
- case 1 ... 8:
- if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
- u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
- }
-
- u_desc_ctrl.field.dest_write_en = 0;
- u_desc_ctrl.field.int_en = flags & DMA_PREP_INTERRUPT;
- hw_desc->desc_ctrl = u_desc_ctrl.value;
-}
-
-static inline void iop_desc_set_byte_count(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *chan,
- u32 byte_count)
-{
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- hw_desc.dma->byte_count = byte_count;
- break;
- case AAU_ID:
- hw_desc.aau->byte_count = byte_count;
- break;
- default:
- BUG();
- }
-}
-
-static inline void
-iop_desc_init_interrupt(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *chan)
-{
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- iop_desc_init_memcpy(desc, 1);
- hw_desc.dma->byte_count = 0;
- hw_desc.dma->dest_addr = 0;
- hw_desc.dma->src_addr = 0;
- break;
- case AAU_ID:
- iop_desc_init_null_xor(desc, 2, 1);
- hw_desc.aau->byte_count = 0;
- hw_desc.aau->dest_addr = 0;
- hw_desc.aau->src[0] = 0;
- hw_desc.aau->src[1] = 0;
- break;
- default:
- BUG();
- }
-}
-
-static inline void
-iop_desc_set_zero_sum_byte_count(struct iop_adma_desc_slot *desc, u32 len)
-{
- int slots_per_op = desc->slots_per_op;
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
- int i = 0;
-
- if (len <= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
- hw_desc->byte_count = len;
- } else {
- do {
- iter = iop_hw_desc_slot_idx(hw_desc, i);
- iter->byte_count = IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
- len -= IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT;
- i += slots_per_op;
- } while (len > IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT);
-
- iter = iop_hw_desc_slot_idx(hw_desc, i);
- iter->byte_count = len;
- }
-}
-
-static inline void iop_desc_set_dest_addr(struct iop_adma_desc_slot *desc,
- struct iop_adma_chan *chan,
- dma_addr_t addr)
-{
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- hw_desc.dma->dest_addr = addr;
- break;
- case AAU_ID:
- hw_desc.aau->dest_addr = addr;
- break;
- default:
- BUG();
- }
-}
-
-static inline void iop_desc_set_memcpy_src_addr(struct iop_adma_desc_slot *desc,
- dma_addr_t addr)
-{
- struct iop3xx_desc_dma *hw_desc = desc->hw_desc;
- hw_desc->src_addr = addr;
-}
-
-static inline void
-iop_desc_set_zero_sum_src_addr(struct iop_adma_desc_slot *desc, int src_idx,
- dma_addr_t addr)
-{
-
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
- int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
- int i;
-
- for (i = 0; (slot_cnt -= slots_per_op) >= 0;
- i += slots_per_op, addr += IOP_ADMA_ZERO_SUM_MAX_BYTE_COUNT) {
- iter = iop_hw_desc_slot_idx(hw_desc, i);
- iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
- }
-}
-
-static inline void iop_desc_set_xor_src_addr(struct iop_adma_desc_slot *desc,
- int src_idx, dma_addr_t addr)
-{
-
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc, *iter;
- int slot_cnt = desc->slot_cnt, slots_per_op = desc->slots_per_op;
- int i;
-
- for (i = 0; (slot_cnt -= slots_per_op) >= 0;
- i += slots_per_op, addr += IOP_ADMA_XOR_MAX_BYTE_COUNT) {
- iter = iop_hw_desc_slot_idx(hw_desc, i);
- iop3xx_aau_desc_set_src_addr(iter, src_idx, addr);
- }
-}
-
-static inline void iop_desc_set_next_desc(struct iop_adma_desc_slot *desc,
- u32 next_desc_addr)
-{
- /* hw_desc->next_desc is the same location for all channels */
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
-
- iop_paranoia(hw_desc.dma->next_desc);
- hw_desc.dma->next_desc = next_desc_addr;
-}
-
-static inline u32 iop_desc_get_next_desc(struct iop_adma_desc_slot *desc)
-{
- /* hw_desc->next_desc is the same location for all channels */
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
- return hw_desc.dma->next_desc;
-}
-
-static inline void iop_desc_clear_next_desc(struct iop_adma_desc_slot *desc)
-{
- /* hw_desc->next_desc is the same location for all channels */
- union iop3xx_desc hw_desc = { .ptr = desc->hw_desc, };
- hw_desc.dma->next_desc = 0;
-}
-
-static inline void iop_desc_set_block_fill_val(struct iop_adma_desc_slot *desc,
- u32 val)
-{
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
- hw_desc->src[0] = val;
-}
-
-static inline enum sum_check_flags
-iop_desc_get_zero_result(struct iop_adma_desc_slot *desc)
-{
- struct iop3xx_desc_aau *hw_desc = desc->hw_desc;
- struct iop3xx_aau_desc_ctrl desc_ctrl = hw_desc->desc_ctrl_field;
-
- iop_paranoia(!(desc_ctrl.tx_complete && desc_ctrl.zero_result_en));
- return desc_ctrl.zero_result_err << SUM_CHECK_P;
-}
-
-static inline void iop_chan_append(struct iop_adma_chan *chan)
-{
- u32 dma_chan_ctrl;
-
- dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
- dma_chan_ctrl |= 0x2;
- __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline u32 iop_chan_get_status(struct iop_adma_chan *chan)
-{
- return __raw_readl(DMA_CSR(chan));
-}
-
-static inline void iop_chan_disable(struct iop_adma_chan *chan)
-{
- u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
- dma_chan_ctrl &= ~1;
- __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline void iop_chan_enable(struct iop_adma_chan *chan)
-{
- u32 dma_chan_ctrl = __raw_readl(DMA_CCR(chan));
-
- dma_chan_ctrl |= 1;
- __raw_writel(dma_chan_ctrl, DMA_CCR(chan));
-}
-
-static inline void iop_adma_device_clear_eot_status(struct iop_adma_chan *chan)
-{
- u32 status = __raw_readl(DMA_CSR(chan));
- status &= (1 << 9);
- __raw_writel(status, DMA_CSR(chan));
-}
-
-static inline void iop_adma_device_clear_eoc_status(struct iop_adma_chan *chan)
-{
- u32 status = __raw_readl(DMA_CSR(chan));
- status &= (1 << 8);
- __raw_writel(status, DMA_CSR(chan));
-}
-
-static inline void iop_adma_device_clear_err_status(struct iop_adma_chan *chan)
-{
- u32 status = __raw_readl(DMA_CSR(chan));
-
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- status &= (1 << 5) | (1 << 3) | (1 << 2) | (1 << 1);
- break;
- case AAU_ID:
- status &= (1 << 5);
- break;
- default:
- BUG();
- }
-
- __raw_writel(status, DMA_CSR(chan));
-}
-
-static inline int
-iop_is_err_int_parity(unsigned long status, struct iop_adma_chan *chan)
-{
- return 0;
-}
-
-static inline int
-iop_is_err_mcu_abort(unsigned long status, struct iop_adma_chan *chan)
-{
- return 0;
-}
-
-static inline int
-iop_is_err_int_tabort(unsigned long status, struct iop_adma_chan *chan)
-{
- return 0;
-}
-
-static inline int
-iop_is_err_int_mabort(unsigned long status, struct iop_adma_chan *chan)
-{
- return test_bit(5, &status);
-}
-
-static inline int
-iop_is_err_pci_tabort(unsigned long status, struct iop_adma_chan *chan)
-{
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return test_bit(2, &status);
- default:
- return 0;
- }
-}
-
-static inline int
-iop_is_err_pci_mabort(unsigned long status, struct iop_adma_chan *chan)
-{
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return test_bit(3, &status);
- default:
- return 0;
- }
-}
-
-static inline int
-iop_is_err_split_tx(unsigned long status, struct iop_adma_chan *chan)
-{
- switch (chan->device->id) {
- case DMA0_ID:
- case DMA1_ID:
- return test_bit(1, &status);
- default:
- return 0;
- }
-}
-#endif /* _ADMA_H */
projects / platform / kernel / linux-rpi.git / commitdiff