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author | 2007-01-02 11:10:43 -0700 | |
---|---|---|
committer | 2007-07-13 08:06:11 -0700 | |
commit | 7405f74badf46b5d023c5d2b670b4471525f6c91 (patch) | |
tree | 20dd20571637dba1c2b04c7b13ac208c33b5706b /drivers/dma | |
parent | I/OAT: fix I/OAT for kexec (diff) | |
download | linux-7405f74badf46b5d023c5d2b670b4471525f6c91.tar.gz linux-7405f74badf46b5d023c5d2b670b4471525f6c91.tar.bz2 linux-7405f74badf46b5d023c5d2b670b4471525f6c91.zip |
dmaengine: refactor dmaengine around dma_async_tx_descriptor
The current dmaengine interface defines mutliple routines per operation,
i.e. dma_async_memcpy_buf_to_buf, dma_async_memcpy_buf_to_page etc. Adding
more operation types (xor, crc, etc) to this model would result in an
unmanageable number of method permutations.
Are we really going to add a set of hooks for each DMA engine
whizbang feature?
- Jeff Garzik
The descriptor creation process is refactored using the new common
dma_async_tx_descriptor structure. Instead of per driver
do_<operation>_<dest>_to_<src> methods, drivers integrate
dma_async_tx_descriptor into their private software descriptor and then
define a 'prep' routine per operation. The prep routine allocates a
descriptor and ensures that the tx_set_src, tx_set_dest, tx_submit routines
are valid. Descriptor creation and submission becomes:
struct dma_device *dev;
struct dma_chan *chan;
struct dma_async_tx_descriptor *tx;
tx = dev->device_prep_dma_<operation>(chan, len, int_flag)
tx->tx_set_src(dma_addr_t, tx, index /* for multi-source ops */)
tx->tx_set_dest(dma_addr_t, tx, index)
tx->tx_submit(tx)
In addition to the refactoring, dma_async_tx_descriptor also lays the
groundwork for definining cross-channel-operation dependencies, and a
callback facility for asynchronous notification of operation completion.
Changelog:
* drop dma mapping methods, suggested by Chris Leech
* fix ioat_dma_dependency_added, also caught by Andrew Morton
* fix dma_sync_wait, change from Andrew Morton
* uninline large functions, change from Andrew Morton
* add tx->callback = NULL to dmaengine calls to interoperate with async_tx
calls
* hookup ioat_tx_submit
* convert channel capabilities to a 'cpumask_t like' bitmap
* removed DMA_TX_ARRAY_INIT, no longer needed
* checkpatch.pl fixes
* make set_src, set_dest, and tx_submit descriptor specific methods
* fixup git-ioat merge
* move group_list and phys to dma_async_tx_descriptor
Cc: Jeff Garzik <jeff@garzik.org>
Cc: Chris Leech <christopher.leech@intel.com>
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/dma')
-rw-r--r-- | drivers/dma/dmaengine.c | 182 | ||||
-rw-r--r-- | drivers/dma/ioatdma.c | 295 | ||||
-rw-r--r-- | drivers/dma/ioatdma.h | 13 |
3 files changed, 325 insertions, 165 deletions
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index 828310d8be80..404cc7b6e705 100644 --- a/drivers/dma/dmaengine.c +++ b/drivers/dma/dmaengine.c @@ -59,6 +59,7 @@ #include <linux/init.h> #include <linux/module.h> +#include <linux/mm.h> #include <linux/device.h> #include <linux/dmaengine.h> #include <linux/hardirq.h> @@ -66,6 +67,7 @@ #include <linux/percpu.h> #include <linux/rcupdate.h> #include <linux/mutex.h> +#include <linux/jiffies.h> static DEFINE_MUTEX(dma_list_mutex); static LIST_HEAD(dma_device_list); @@ -165,6 +167,24 @@ static struct dma_chan *dma_client_chan_alloc(struct dma_client *client) return NULL; } +enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie) +{ + enum dma_status status; + unsigned long dma_sync_wait_timeout = jiffies + msecs_to_jiffies(5000); + + dma_async_issue_pending(chan); + do { + status = dma_async_is_tx_complete(chan, cookie, NULL, NULL); + if (time_after_eq(jiffies, dma_sync_wait_timeout)) { + printk(KERN_ERR "dma_sync_wait_timeout!\n"); + return DMA_ERROR; + } + } while (status == DMA_IN_PROGRESS); + + return status; +} +EXPORT_SYMBOL(dma_sync_wait); + /** * dma_chan_cleanup - release a DMA channel's resources * @kref: kernel reference structure that contains the DMA channel device @@ -322,6 +342,25 @@ int dma_async_device_register(struct dma_device *device) if (!device) return -ENODEV; + /* validate device routines */ + BUG_ON(dma_has_cap(DMA_MEMCPY, device->cap_mask) && + !device->device_prep_dma_memcpy); + BUG_ON(dma_has_cap(DMA_XOR, device->cap_mask) && + !device->device_prep_dma_xor); + BUG_ON(dma_has_cap(DMA_ZERO_SUM, device->cap_mask) && + !device->device_prep_dma_zero_sum); + BUG_ON(dma_has_cap(DMA_MEMSET, device->cap_mask) && + !device->device_prep_dma_memset); + BUG_ON(dma_has_cap(DMA_ZERO_SUM, device->cap_mask) && + !device->device_prep_dma_interrupt); + + BUG_ON(!device->device_alloc_chan_resources); + BUG_ON(!device->device_free_chan_resources); + BUG_ON(!device->device_dependency_added); + BUG_ON(!device->device_is_tx_complete); + BUG_ON(!device->device_issue_pending); + BUG_ON(!device->dev); + init_completion(&device->done); kref_init(&device->refcount); device->dev_id = id++; @@ -415,6 +454,149 @@ void dma_async_device_unregister(struct dma_device *device) } EXPORT_SYMBOL(dma_async_device_unregister); +/** + * dma_async_memcpy_buf_to_buf - offloaded copy between virtual addresses + * @chan: DMA channel to offload copy to + * @dest: destination address (virtual) + * @src: source address (virtual) + * @len: length + * + * Both @dest and @src must be mappable to a bus address according to the + * DMA mapping API rules for streaming mappings. + * Both @dest and @src must stay memory resident (kernel memory or locked + * user space pages). + */ +dma_cookie_t +dma_async_memcpy_buf_to_buf(struct dma_chan *chan, void *dest, + void *src, size_t len) +{ + struct dma_device *dev = chan->device; + struct dma_async_tx_descriptor *tx; + dma_addr_t addr; + dma_cookie_t cookie; + int cpu; + + tx = dev->device_prep_dma_memcpy(chan, len, 0); + if (!tx) + return -ENOMEM; + + tx->ack = 1; + tx->callback = NULL; + addr = dma_map_single(dev->dev, src, len, DMA_TO_DEVICE); + tx->tx_set_src(addr, tx, 0); + addr = dma_map_single(dev->dev, dest, len, DMA_FROM_DEVICE); + tx->tx_set_dest(addr, tx, 0); + cookie = tx->tx_submit(tx); + + cpu = get_cpu(); + per_cpu_ptr(chan->local, cpu)->bytes_transferred += len; + per_cpu_ptr(chan->local, cpu)->memcpy_count++; + put_cpu(); + + return cookie; +} +EXPORT_SYMBOL(dma_async_memcpy_buf_to_buf); + +/** + * dma_async_memcpy_buf_to_pg - offloaded copy from address to page + * @chan: DMA channel to offload copy to + * @page: destination page + * @offset: offset in page to copy to + * @kdata: source address (virtual) + * @len: length + * + * Both @page/@offset and @kdata must be mappable to a bus address according + * to the DMA mapping API rules for streaming mappings. + * Both @page/@offset and @kdata must stay memory resident (kernel memory or + * locked user space pages) + */ +dma_cookie_t +dma_async_memcpy_buf_to_pg(struct dma_chan *chan, struct page *page, + unsigned int offset, void *kdata, size_t len) +{ + struct dma_device *dev = chan->device; + struct dma_async_tx_descriptor *tx; + dma_addr_t addr; + dma_cookie_t cookie; + int cpu; + + tx = dev->device_prep_dma_memcpy(chan, len, 0); + if (!tx) + return -ENOMEM; + + tx->ack = 1; + tx->callback = NULL; + addr = dma_map_single(dev->dev, kdata, len, DMA_TO_DEVICE); + tx->tx_set_src(addr, tx, 0); + addr = dma_map_page(dev->dev, page, offset, len, DMA_FROM_DEVICE); + tx->tx_set_dest(addr, tx, 0); + cookie = tx->tx_submit(tx); + + cpu = get_cpu(); + per_cpu_ptr(chan->local, cpu)->bytes_transferred += len; + per_cpu_ptr(chan->local, cpu)->memcpy_count++; + put_cpu(); + + return cookie; +} +EXPORT_SYMBOL(dma_async_memcpy_buf_to_pg); + +/** + * dma_async_memcpy_pg_to_pg - offloaded copy from page to page + * @chan: DMA channel to offload copy to + * @dest_pg: destination page + * @dest_off: offset in page to copy to + * @src_pg: source page + * @src_off: offset in page to copy from + * @len: length + * + * Both @dest_page/@dest_off and @src_page/@src_off must be mappable to a bus + * address according to the DMA mapping API rules for streaming mappings. + * Both @dest_page/@dest_off and @src_page/@src_off must stay memory resident + * (kernel memory or locked user space pages). + */ +dma_cookie_t +dma_async_memcpy_pg_to_pg(struct dma_chan *chan, struct page *dest_pg, + unsigned int dest_off, struct page *src_pg, unsigned int src_off, + size_t len) +{ + struct dma_device *dev = chan->device; + struct dma_async_tx_descriptor *tx; + dma_addr_t addr; + dma_cookie_t cookie; + int cpu; + + tx = dev->device_prep_dma_memcpy(chan, len, 0); + if (!tx) + return -ENOMEM; + + tx->ack = 1; + tx->callback = NULL; + addr = dma_map_page(dev->dev, src_pg, src_off, len, DMA_TO_DEVICE); + tx->tx_set_src(addr, tx, 0); + addr = dma_map_page(dev->dev, dest_pg, dest_off, len, DMA_FROM_DEVICE); + tx->tx_set_dest(addr, tx, 0); + cookie = tx->tx_submit(tx); + + cpu = get_cpu(); + per_cpu_ptr(chan->local, cpu)->bytes_transferred += len; + per_cpu_ptr(chan->local, cpu)->memcpy_count++; + put_cpu(); + + return cookie; +} +EXPORT_SYMBOL(dma_async_memcpy_pg_to_pg); + +void dma_async_tx_descriptor_init(struct dma_async_tx_descriptor *tx, + struct dma_chan *chan) +{ + tx->chan = chan; + spin_lock_init(&tx->lock); + INIT_LIST_HEAD(&tx->depend_node); + INIT_LIST_HEAD(&tx->depend_list); +} +EXPORT_SYMBOL(dma_async_tx_descriptor_init); + static int __init dma_bus_init(void) { mutex_init(&dma_list_mutex); diff --git a/drivers/dma/ioatdma.c b/drivers/dma/ioatdma.c index c4209af4fde4..171044930282 100644 --- a/drivers/dma/ioatdma.c +++ b/drivers/dma/ioatdma.c @@ -38,6 +38,7 @@ #define to_ioat_chan(chan) container_of(chan, struct ioat_dma_chan, common) #define to_ioat_device(dev) container_of(dev, struct ioat_device, common) #define to_ioat_desc(lh) container_of(lh, struct ioat_desc_sw, node) +#define tx_to_ioat_desc(tx) container_of(tx, struct ioat_desc_sw, async_tx) /* internal functions */ static int __devinit ioat_probe(struct pci_dev *pdev, const struct pci_device_id *ent); @@ -78,6 +79,73 @@ static int enumerate_dma_channels(struct ioat_device *device) return device->common.chancnt; } +static void +ioat_set_src(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index) +{ + struct ioat_desc_sw *iter, *desc = tx_to_ioat_desc(tx); + struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan); + + pci_unmap_addr_set(desc, src, addr); + + list_for_each_entry(iter, &desc->async_tx.tx_list, node) { + iter->hw->src_addr = addr; + addr += ioat_chan->xfercap; + } + +} + +static void +ioat_set_dest(dma_addr_t addr, struct dma_async_tx_descriptor *tx, int index) +{ + struct ioat_desc_sw *iter, *desc = tx_to_ioat_desc(tx); + struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan); + + pci_unmap_addr_set(desc, dst, addr); + + list_for_each_entry(iter, &desc->async_tx.tx_list, node) { + iter->hw->dst_addr = addr; + addr += ioat_chan->xfercap; + } +} + +static dma_cookie_t +ioat_tx_submit(struct dma_async_tx_descriptor *tx) +{ + struct ioat_dma_chan *ioat_chan = to_ioat_chan(tx->chan); + struct ioat_desc_sw *desc = tx_to_ioat_desc(tx); + int append = 0; + dma_cookie_t cookie; + struct ioat_desc_sw *group_start; + + group_start = list_entry(desc->async_tx.tx_list.next, + struct ioat_desc_sw, node); + spin_lock_bh(&ioat_chan->desc_lock); + /* cookie incr and addition to used_list must be atomic */ + cookie = ioat_chan->common.cookie; + cookie++; + if (cookie < 0) + cookie = 1; + ioat_chan->common.cookie = desc->async_tx.cookie = cookie; + + /* write address into NextDescriptor field of last desc in chain */ + to_ioat_desc(ioat_chan->used_desc.prev)->hw->next = + group_start->async_tx.phys; + list_splice_init(&desc->async_tx.tx_list, ioat_chan->used_desc.prev); + + ioat_chan->pending += desc->tx_cnt; + if (ioat_chan->pending >= 4) { + append = 1; + ioat_chan->pending = 0; + } + spin_unlock_bh(&ioat_chan->desc_lock); + + if (append) + writeb(IOAT_CHANCMD_APPEND, + ioat_chan->reg_base + IOAT_CHANCMD_OFFSET); + + return cookie; +} + static struct ioat_desc_sw *ioat_dma_alloc_descriptor( struct ioat_dma_chan *ioat_chan, gfp_t flags) @@ -99,8 +167,13 @@ static struct ioat_desc_sw *ioat_dma_alloc_descriptor( } memset(desc, 0, sizeof(*desc)); + dma_async_tx_descriptor_init(&desc_sw->async_tx, &ioat_chan->common); + desc_sw->async_tx.tx_set_src = ioat_set_src; + desc_sw->async_tx.tx_set_dest = ioat_set_dest; + desc_sw->async_tx.tx_submit = ioat_tx_submit; + INIT_LIST_HEAD(&desc_sw->async_tx.tx_list); desc_sw->hw = desc; - desc_sw->phys = phys; + desc_sw->async_tx.phys = phys; return desc_sw; } @@ -188,12 +261,14 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan) list_for_each_entry_safe(desc, _desc, &ioat_chan->used_desc, node) { in_use_descs++; list_del(&desc->node); - pci_pool_free(ioat_device->dma_pool, desc->hw, desc->phys); + pci_pool_free(ioat_device->dma_pool, desc->hw, + desc->async_tx.phys); kfree(desc); } list_for_each_entry_safe(desc, _desc, &ioat_chan->free_desc, node) { list_del(&desc->node); - pci_pool_free(ioat_device->dma_pool, desc->hw, desc->phys); + pci_pool_free(ioat_device->dma_pool, desc->hw, + desc->async_tx.phys); kfree(desc); } spin_unlock_bh(&ioat_chan->desc_lock); @@ -215,45 +290,25 @@ static void ioat_dma_free_chan_resources(struct dma_chan *chan) writew(chanctrl, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); } -/** - * do_ioat_dma_memcpy - actual function that initiates a IOAT DMA transaction - * @ioat_chan: IOAT DMA channel handle - * @dest: DMA destination address - * @src: DMA source address - * @len: transaction length in bytes - */ - -static dma_cookie_t do_ioat_dma_memcpy(struct ioat_dma_chan *ioat_chan, - dma_addr_t dest, - dma_addr_t src, - size_t len) +static struct dma_async_tx_descriptor * +ioat_dma_prep_memcpy(struct dma_chan *chan, size_t len, int int_en) { - struct ioat_desc_sw *first; - struct ioat_desc_sw *prev; - struct ioat_desc_sw *new; - dma_cookie_t cookie; + struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); + struct ioat_desc_sw *first, *prev, *new; LIST_HEAD(new_chain); u32 copy; size_t orig_len; - dma_addr_t orig_src, orig_dst; - unsigned int desc_count = 0; - unsigned int append = 0; - - if (!ioat_chan || !dest || !src) - return -EFAULT; + int desc_count = 0; if (!len) - return ioat_chan->common.cookie; + return NULL; orig_len = len; - orig_src = src; - orig_dst = dest; first = NULL; prev = NULL; spin_lock_bh(&ioat_chan->desc_lock); - while (len) { if (!list_empty(&ioat_chan->free_desc)) { new = to_ioat_desc(ioat_chan->free_desc.next); @@ -270,140 +325,36 @@ static dma_cookie_t do_ioat_dma_memcpy(struct ioat_dma_chan *ioat_chan, new->hw->size = copy; new->hw->ctl = 0; - new->hw->src_addr = src; - new->hw->dst_addr = dest; - new->cookie = 0; + new->async_tx.cookie = 0; + new->async_tx.ack = 1; /* chain together the physical address list for the HW */ if (!first) first = new; else - prev->hw->next = (u64) new->phys; + prev->hw->next = (u64) new->async_tx.phys; prev = new; - len -= copy; - dest += copy; - src += copy; - list_add_tail(&new->node, &new_chain); desc_count++; } - new->hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS; - new->hw->next = 0; - /* cookie incr and addition to used_list must be atomic */ + list_splice(&new_chain, &new->async_tx.tx_list); - cookie = ioat_chan->common.cookie; - cookie++; - if (cookie < 0) - cookie = 1; - ioat_chan->common.cookie = new->cookie = cookie; + new->hw->ctl = IOAT_DMA_DESCRIPTOR_CTL_CP_STS; + new->hw->next = 0; + new->tx_cnt = desc_count; + new->async_tx.ack = 0; /* client is in control of this ack */ + new->async_tx.cookie = -EBUSY; - pci_unmap_addr_set(new, src, orig_src); - pci_unmap_addr_set(new, dst, orig_dst); pci_unmap_len_set(new, src_len, orig_len); pci_unmap_len_set(new, dst_len, orig_len); - - /* write address into NextDescriptor field of last desc in chain */ - to_ioat_desc(ioat_chan->used_desc.prev)->hw->next = first->phys; - list_splice_init(&new_chain, ioat_chan->used_desc.prev); - - ioat_chan->pending += desc_count; - if (ioat_chan->pending >= 4) { - append = 1; - ioat_chan->pending = 0; - } - spin_unlock_bh(&ioat_chan->desc_lock); - if (append) - writeb(IOAT_CHANCMD_APPEND, - ioat_chan->reg_base + IOAT_CHANCMD_OFFSET); - return cookie; + return new ? &new->async_tx : NULL; } -/** - * ioat_dma_memcpy_buf_to_buf - wrapper that takes src & dest bufs - * @chan: IOAT DMA channel handle - * @dest: DMA destination address - * @src: DMA source address - * @len: transaction length in bytes - */ - -static dma_cookie_t ioat_dma_memcpy_buf_to_buf(struct dma_chan *chan, - void *dest, - void *src, - size_t len) -{ - dma_addr_t dest_addr; - dma_addr_t src_addr; - struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); - - dest_addr = pci_map_single(ioat_chan->device->pdev, - dest, len, PCI_DMA_FROMDEVICE); - src_addr = pci_map_single(ioat_chan->device->pdev, - src, len, PCI_DMA_TODEVICE); - - return do_ioat_dma_memcpy(ioat_chan, dest_addr, src_addr, len); -} - -/** - * ioat_dma_memcpy_buf_to_pg - wrapper, copying from a buf to a page - * @chan: IOAT DMA channel handle - * @page: pointer to the page to copy to - * @offset: offset into that page - * @src: DMA source address - * @len: transaction length in bytes - */ - -static dma_cookie_t ioat_dma_memcpy_buf_to_pg(struct dma_chan *chan, - struct page *page, - unsigned int offset, - void *src, - size_t len) -{ - dma_addr_t dest_addr; - dma_addr_t src_addr; - struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); - - dest_addr = pci_map_page(ioat_chan->device->pdev, - page, offset, len, PCI_DMA_FROMDEVICE); - src_addr = pci_map_single(ioat_chan->device->pdev, - src, len, PCI_DMA_TODEVICE); - - return do_ioat_dma_memcpy(ioat_chan, dest_addr, src_addr, len); -} - -/** - * ioat_dma_memcpy_pg_to_pg - wrapper, copying between two pages - * @chan: IOAT DMA channel handle - * @dest_pg: pointer to the page to copy to - * @dest_off: offset into that page - * @src_pg: pointer to the page to copy from - * @src_off: offset into that page - * @len: transaction length in bytes. This is guaranteed not to make a copy - * across a page boundary. - */ - -static dma_cookie_t ioat_dma_memcpy_pg_to_pg(struct dma_chan *chan, - struct page *dest_pg, - unsigned int dest_off, - struct page *src_pg, - unsigned int src_off, - size_t len) -{ - dma_addr_t dest_addr; - dma_addr_t src_addr; - struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); - - dest_addr = pci_map_page(ioat_chan->device->pdev, - dest_pg, dest_off, len, PCI_DMA_FROMDEVICE); - src_addr = pci_map_page(ioat_chan->device->pdev, - src_pg, src_off, len, PCI_DMA_TODEVICE); - - return do_ioat_dma_memcpy(ioat_chan, dest_addr, src_addr, len); -} /** * ioat_dma_memcpy_issue_pending - push potentially unrecognized appended descriptors to hw @@ -465,8 +416,8 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan) * exceeding xfercap, perhaps. If so, only the last one will * have a cookie, and require unmapping. */ - if (desc->cookie) { - cookie = desc->cookie; + if (desc->async_tx.cookie) { + cookie = desc->async_tx.cookie; /* yes we are unmapping both _page and _single alloc'd regions with unmap_page. Is this *really* that bad? @@ -481,14 +432,19 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan) PCI_DMA_TODEVICE); } - if (desc->phys != phys_complete) { - /* a completed entry, but not the last, so cleanup */ - list_del(&desc->node); - list_add_tail(&desc->node, &chan->free_desc); + if (desc->async_tx.phys != phys_complete) { + /* a completed entry, but not the last, so cleanup + * if the client is done with the descriptor + */ + if (desc->async_tx.ack) { + list_del(&desc->node); + list_add_tail(&desc->node, &chan->free_desc); + } else + desc->async_tx.cookie = 0; } else { /* last used desc. Do not remove, so we can append from it, but don't look at it next time, either */ - desc->cookie = 0; + desc->async_tx.cookie = 0; /* TODO check status bits? */ break; @@ -504,6 +460,17 @@ static void ioat_dma_memcpy_cleanup(struct ioat_dma_chan *chan) spin_unlock(&chan->cleanup_lock); } +static void ioat_dma_dependency_added(struct dma_chan *chan) +{ + struct ioat_dma_chan *ioat_chan = to_ioat_chan(chan); + spin_lock_bh(&ioat_chan->desc_lock); + if (ioat_chan->pending == 0) { + spin_unlock_bh(&ioat_chan->desc_lock); + ioat_dma_memcpy_cleanup(ioat_chan); + } else + spin_unlock_bh(&ioat_chan->desc_lock); +} + /** * ioat_dma_is_complete - poll the status of a IOAT DMA transaction * @chan: IOAT DMA channel handle @@ -606,13 +573,14 @@ static void ioat_start_null_desc(struct ioat_dma_chan *ioat_chan) desc->hw->ctl = IOAT_DMA_DESCRIPTOR_NUL; desc->hw->next = 0; + desc->async_tx.ack = 1; list_add_tail(&desc->node, &ioat_chan->used_desc); spin_unlock_bh(&ioat_chan->desc_lock); - writel(((u64) desc->phys) & 0x00000000FFFFFFFF, + writel(((u64) desc->async_tx.phys) & 0x00000000FFFFFFFF, ioat_chan->reg_base + IOAT_CHAINADDR_OFFSET_LOW); - writel(((u64) desc->phys) >> 32, + writel(((u64) desc->async_tx.phys) >> 32, ioat_chan->reg_base + IOAT_CHAINADDR_OFFSET_HIGH); writeb(IOAT_CHANCMD_START, ioat_chan->reg_base + IOAT_CHANCMD_OFFSET); @@ -629,6 +597,8 @@ static int ioat_self_test(struct ioat_device *device) u8 *src; u8 *dest; struct dma_chan *dma_chan; + struct dma_async_tx_descriptor *tx; + dma_addr_t addr; dma_cookie_t cookie; int err = 0; @@ -654,7 +624,15 @@ static int ioat_self_test(struct ioat_device *device) goto out; } - cookie = ioat_dma_memcpy_buf_to_buf(dma_chan, dest, src, IOAT_TEST_SIZE); + tx = ioat_dma_prep_memcpy(dma_chan, IOAT_TEST_SIZE, 0); + async_tx_ack(tx); + addr = dma_map_single(dma_chan->device->dev, src, IOAT_TEST_SIZE, + DMA_TO_DEVICE); + ioat_set_src(addr, tx, 0); + addr = dma_map_single(dma_chan->device->dev, dest, IOAT_TEST_SIZE, + DMA_FROM_DEVICE); + ioat_set_dest(addr, tx, 0); + cookie = ioat_tx_submit(tx); ioat_dma_memcpy_issue_pending(dma_chan); msleep(1); @@ -750,13 +728,14 @@ static int __devinit ioat_probe(struct pci_dev *pdev, INIT_LIST_HEAD(&device->common.channels); enumerate_dma_channels(device); + dma_cap_set(DMA_MEMCPY, device->common.cap_mask); device->common.device_alloc_chan_resources = ioat_dma_alloc_chan_resources; device->common.device_free_chan_resources = ioat_dma_free_chan_resources; - device->common.device_memcpy_buf_to_buf = ioat_dma_memcpy_buf_to_buf; - device->common.device_memcpy_buf_to_pg = ioat_dma_memcpy_buf_to_pg; - device->common.device_memcpy_pg_to_pg = ioat_dma_memcpy_pg_to_pg; - device->common.device_memcpy_complete = ioat_dma_is_complete; - device->common.device_memcpy_issue_pending = ioat_dma_memcpy_issue_pending; + device->common.device_prep_dma_memcpy = ioat_dma_prep_memcpy; + device->common.device_is_tx_complete = ioat_dma_is_complete; + device->common.device_issue_pending = ioat_dma_memcpy_issue_pending; + device->common.device_dependency_added = ioat_dma_dependency_added; + device->common.dev = &pdev->dev; printk(KERN_INFO "Intel(R) I/OAT DMA Engine found, %d channels\n", device->common.chancnt); diff --git a/drivers/dma/ioatdma.h b/drivers/dma/ioatdma.h index 62b26a9be4c9..d3f69bb15fa0 100644 --- a/drivers/dma/ioatdma.h +++ b/drivers/dma/ioatdma.h @@ -105,21 +105,20 @@ struct ioat_dma_chan { /** * struct ioat_desc_sw - wrapper around hardware descriptor * @hw: hardware DMA descriptor - * @node: - * @cookie: - * @phys: + * @node: this descriptor will either be on the free list, + * or attached to a transaction list (async_tx.tx_list) + * @tx_cnt: number of descriptors required to complete the transaction + * @async_tx: the generic software descriptor for all engines */ - struct ioat_desc_sw { struct ioat_dma_descriptor *hw; struct list_head node; - dma_cookie_t cookie; - dma_addr_t phys; + int tx_cnt; DECLARE_PCI_UNMAP_ADDR(src) DECLARE_PCI_UNMAP_LEN(src_len) DECLARE_PCI_UNMAP_ADDR(dst) DECLARE_PCI_UNMAP_LEN(dst_len) + struct dma_async_tx_descriptor async_tx; }; #endif /* IOATDMA_H */ - |