From: Dave Jiang Date: Tue, 11 Aug 2015 15:48:32 +0000 (-0700) Subject: dmaengine: ioatdma: remove dma_v2.* X-Git-Tag: v4.3-rc1~80^2~59 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=885b201056e942f7deb66496b5c501d2a35d6c04;p=karo-tx-linux.git dmaengine: ioatdma: remove dma_v2.* Clean out dma_v2 and remove ioat2 calls since we are moving everything to just ioat. Signed-off-by: Dave Jiang Acked-by: Dan Williams Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/ioat/Makefile b/drivers/dma/ioat/Makefile index 0ff7270af25b..655df9188387 100644 --- a/drivers/dma/ioat/Makefile +++ b/drivers/dma/ioat/Makefile @@ -1,2 +1,2 @@ obj-$(CONFIG_INTEL_IOATDMA) += ioatdma.o -ioatdma-y := pci.o dma.o dma_v2.o dma_v3.o dca.o +ioatdma-y := pci.o dma.o dma_v3.o dca.o diff --git a/drivers/dma/ioat/dca.c b/drivers/dma/ioat/dca.c index 540d94ce9736..f2b9a421985a 100644 --- a/drivers/dma/ioat/dca.c +++ b/drivers/dma/ioat/dca.c @@ -31,7 +31,6 @@ #include "dma.h" #include "registers.h" -#include "dma_v2.h" /* * Bit 7 of a tag map entry is the "valid" bit, if it is set then bits 0:6 diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index 3cf2639fb06a..02b5c04dea8a 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -41,6 +41,19 @@ int ioat_pending_level = 4; module_param(ioat_pending_level, int, 0644); MODULE_PARM_DESC(ioat_pending_level, "high-water mark for pushing ioat descriptors (default: 4)"); +int ioat_ring_alloc_order = 8; +module_param(ioat_ring_alloc_order, int, 0644); +MODULE_PARM_DESC(ioat_ring_alloc_order, + "ioat+: allocate 2^n descriptors per channel (default: 8 max: 16)"); +static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER; +module_param(ioat_ring_max_alloc_order, int, 0644); +MODULE_PARM_DESC(ioat_ring_max_alloc_order, + "ioat+: upper limit for ring size (default: 16)"); +static char ioat_interrupt_style[32] = "msix"; +module_param_string(ioat_interrupt_style, ioat_interrupt_style, + sizeof(ioat_interrupt_style), 0644); +MODULE_PARM_DESC(ioat_interrupt_style, + "set ioat interrupt style: msix (default), msi, intx"); /** * ioat_dma_do_interrupt - handler used for single vector interrupt mode @@ -314,12 +327,6 @@ out: return err; } -static char ioat_interrupt_style[32] = "msix"; -module_param_string(ioat_interrupt_style, ioat_interrupt_style, - sizeof(ioat_interrupt_style), 0644); -MODULE_PARM_DESC(ioat_interrupt_style, - "set ioat interrupt style: msix (default), msi, intx"); - /** * ioat_dma_setup_interrupts - setup interrupt handler * @ioat_dma: ioat dma device @@ -577,3 +584,651 @@ void ioat_dma_remove(struct ioatdma_device *ioat_dma) INIT_LIST_HEAD(&dma->channels); } + +void __ioat_issue_pending(struct ioatdma_chan *ioat_chan) +{ + ioat_chan->dmacount += ioat_ring_pending(ioat_chan); + ioat_chan->issued = ioat_chan->head; + writew(ioat_chan->dmacount, + ioat_chan->reg_base + IOAT_CHAN_DMACOUNT_OFFSET); + dev_dbg(to_dev(ioat_chan), + "%s: head: %#x tail: %#x issued: %#x count: %#x\n", + __func__, ioat_chan->head, ioat_chan->tail, + ioat_chan->issued, ioat_chan->dmacount); +} + +void ioat_issue_pending(struct dma_chan *c) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + + if (ioat_ring_pending(ioat_chan)) { + spin_lock_bh(&ioat_chan->prep_lock); + __ioat_issue_pending(ioat_chan); + spin_unlock_bh(&ioat_chan->prep_lock); + } +} + +/** + * ioat_update_pending - log pending descriptors + * @ioat: ioat+ channel + * + * Check if the number of unsubmitted descriptors has exceeded the + * watermark. Called with prep_lock held + */ +static void ioat_update_pending(struct ioatdma_chan *ioat_chan) +{ + if (ioat_ring_pending(ioat_chan) > ioat_pending_level) + __ioat_issue_pending(ioat_chan); +} + +static void __ioat_start_null_desc(struct ioatdma_chan *ioat_chan) +{ + struct ioat_ring_ent *desc; + struct ioat_dma_descriptor *hw; + + if (ioat_ring_space(ioat_chan) < 1) { + dev_err(to_dev(ioat_chan), + "Unable to start null desc - ring full\n"); + return; + } + + dev_dbg(to_dev(ioat_chan), + "%s: head: %#x tail: %#x issued: %#x\n", + __func__, ioat_chan->head, ioat_chan->tail, ioat_chan->issued); + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head); + + hw = desc->hw; + hw->ctl = 0; + hw->ctl_f.null = 1; + hw->ctl_f.int_en = 1; + hw->ctl_f.compl_write = 1; + /* set size to non-zero value (channel returns error when size is 0) */ + hw->size = NULL_DESC_BUFFER_SIZE; + hw->src_addr = 0; + hw->dst_addr = 0; + async_tx_ack(&desc->txd); + ioat_set_chainaddr(ioat_chan, desc->txd.phys); + dump_desc_dbg(ioat_chan, desc); + /* make sure descriptors are written before we submit */ + wmb(); + ioat_chan->head += 1; + __ioat_issue_pending(ioat_chan); +} + +static void ioat_start_null_desc(struct ioatdma_chan *ioat_chan) +{ + spin_lock_bh(&ioat_chan->prep_lock); + __ioat_start_null_desc(ioat_chan); + spin_unlock_bh(&ioat_chan->prep_lock); +} + +void __ioat_restart_chan(struct ioatdma_chan *ioat_chan) +{ + /* set the tail to be re-issued */ + ioat_chan->issued = ioat_chan->tail; + ioat_chan->dmacount = 0; + set_bit(IOAT_COMPLETION_PENDING, &ioat_chan->state); + mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); + + dev_dbg(to_dev(ioat_chan), + "%s: head: %#x tail: %#x issued: %#x count: %#x\n", + __func__, ioat_chan->head, ioat_chan->tail, + ioat_chan->issued, ioat_chan->dmacount); + + if (ioat_ring_pending(ioat_chan)) { + struct ioat_ring_ent *desc; + + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail); + ioat_set_chainaddr(ioat_chan, desc->txd.phys); + __ioat_issue_pending(ioat_chan); + } else + __ioat_start_null_desc(ioat_chan); +} + +int ioat_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo) +{ + unsigned long end = jiffies + tmo; + int err = 0; + u32 status; + + status = ioat_chansts(ioat_chan); + if (is_ioat_active(status) || is_ioat_idle(status)) + ioat_suspend(ioat_chan); + while (is_ioat_active(status) || is_ioat_idle(status)) { + if (tmo && time_after(jiffies, end)) { + err = -ETIMEDOUT; + break; + } + status = ioat_chansts(ioat_chan); + cpu_relax(); + } + + return err; +} + +int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo) +{ + unsigned long end = jiffies + tmo; + int err = 0; + + ioat_reset(ioat_chan); + while (ioat_reset_pending(ioat_chan)) { + if (end && time_after(jiffies, end)) { + err = -ETIMEDOUT; + break; + } + cpu_relax(); + } + + return err; +} + +/** + * ioat_enumerate_channels - find and initialize the device's channels + * @ioat_dma: the ioat dma device to be enumerated + */ +int ioat_enumerate_channels(struct ioatdma_device *ioat_dma) +{ + struct ioatdma_chan *ioat_chan; + struct device *dev = &ioat_dma->pdev->dev; + struct dma_device *dma = &ioat_dma->dma_dev; + u8 xfercap_log; + int i; + + INIT_LIST_HEAD(&dma->channels); + dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET); + dma->chancnt &= 0x1f; /* bits [4:0] valid */ + if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) { + dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n", + dma->chancnt, ARRAY_SIZE(ioat_dma->idx)); + dma->chancnt = ARRAY_SIZE(ioat_dma->idx); + } + xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET); + xfercap_log &= 0x1f; /* bits [4:0] valid */ + if (xfercap_log == 0) + return 0; + dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); + + for (i = 0; i < dma->chancnt; i++) { + ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL); + if (!ioat_chan) + break; + + ioat_init_channel(ioat_dma, ioat_chan, i); + ioat_chan->xfercap_log = xfercap_log; + spin_lock_init(&ioat_chan->prep_lock); + if (ioat_dma->reset_hw(ioat_chan)) { + i = 0; + break; + } + } + dma->chancnt = i; + return i; +} + +static dma_cookie_t ioat_tx_submit_unlock(struct dma_async_tx_descriptor *tx) +{ + struct dma_chan *c = tx->chan; + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + dma_cookie_t cookie; + + cookie = dma_cookie_assign(tx); + dev_dbg(to_dev(ioat_chan), "%s: cookie: %d\n", __func__, cookie); + + if (!test_and_set_bit(IOAT_CHAN_ACTIVE, &ioat_chan->state)) + mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); + + /* make descriptor updates visible before advancing ioat->head, + * this is purposefully not smp_wmb() since we are also + * publishing the descriptor updates to a dma device + */ + wmb(); + + ioat_chan->head += ioat_chan->produce; + + ioat_update_pending(ioat_chan); + spin_unlock_bh(&ioat_chan->prep_lock); + + return cookie; +} + +static struct ioat_ring_ent * +ioat_alloc_ring_ent(struct dma_chan *chan, gfp_t flags) +{ + struct ioat_dma_descriptor *hw; + struct ioat_ring_ent *desc; + struct ioatdma_device *ioat_dma; + dma_addr_t phys; + + ioat_dma = to_ioatdma_device(chan->device); + hw = pci_pool_alloc(ioat_dma->dma_pool, flags, &phys); + if (!hw) + return NULL; + memset(hw, 0, sizeof(*hw)); + + desc = kmem_cache_zalloc(ioat_cache, flags); + if (!desc) { + pci_pool_free(ioat_dma->dma_pool, hw, phys); + return NULL; + } + + dma_async_tx_descriptor_init(&desc->txd, chan); + desc->txd.tx_submit = ioat_tx_submit_unlock; + desc->hw = hw; + desc->txd.phys = phys; + return desc; +} + +static void +ioat_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan) +{ + struct ioatdma_device *ioat_dma; + + ioat_dma = to_ioatdma_device(chan->device); + pci_pool_free(ioat_dma->dma_pool, desc->hw, desc->txd.phys); + kmem_cache_free(ioat_cache, desc); +} + +static struct ioat_ring_ent ** +ioat_alloc_ring(struct dma_chan *c, int order, gfp_t flags) +{ + struct ioat_ring_ent **ring; + int descs = 1 << order; + int i; + + if (order > ioat_get_max_alloc_order()) + return NULL; + + /* allocate the array to hold the software ring */ + ring = kcalloc(descs, sizeof(*ring), flags); + if (!ring) + return NULL; + for (i = 0; i < descs; i++) { + ring[i] = ioat_alloc_ring_ent(c, flags); + if (!ring[i]) { + while (i--) + ioat_free_ring_ent(ring[i], c); + kfree(ring); + return NULL; + } + set_desc_id(ring[i], i); + } + + /* link descs */ + for (i = 0; i < descs-1; i++) { + struct ioat_ring_ent *next = ring[i+1]; + struct ioat_dma_descriptor *hw = ring[i]->hw; + + hw->next = next->txd.phys; + } + ring[i]->hw->next = ring[0]->txd.phys; + + return ring; +} + +/** + * ioat_free_chan_resources - release all the descriptors + * @chan: the channel to be cleaned + */ +void ioat_free_chan_resources(struct dma_chan *c) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma; + struct ioat_ring_ent *desc; + const int total_descs = 1 << ioat_chan->alloc_order; + int descs; + int i; + + /* Before freeing channel resources first check + * if they have been previously allocated for this channel. + */ + if (!ioat_chan->ring) + return; + + ioat_stop(ioat_chan); + ioat_dma->reset_hw(ioat_chan); + + spin_lock_bh(&ioat_chan->cleanup_lock); + spin_lock_bh(&ioat_chan->prep_lock); + descs = ioat_ring_space(ioat_chan); + dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs); + for (i = 0; i < descs; i++) { + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head + i); + ioat_free_ring_ent(desc, c); + } + + if (descs < total_descs) + dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n", + total_descs - descs); + + for (i = 0; i < total_descs - descs; i++) { + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail + i); + dump_desc_dbg(ioat_chan, desc); + ioat_free_ring_ent(desc, c); + } + + kfree(ioat_chan->ring); + ioat_chan->ring = NULL; + ioat_chan->alloc_order = 0; + pci_pool_free(ioat_dma->completion_pool, ioat_chan->completion, + ioat_chan->completion_dma); + spin_unlock_bh(&ioat_chan->prep_lock); + spin_unlock_bh(&ioat_chan->cleanup_lock); + + ioat_chan->last_completion = 0; + ioat_chan->completion_dma = 0; + ioat_chan->dmacount = 0; +} + +/* ioat_alloc_chan_resources - allocate/initialize ioat descriptor ring + * @chan: channel to be initialized + */ +int ioat_alloc_chan_resources(struct dma_chan *c) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + struct ioat_ring_ent **ring; + u64 status; + int order; + int i = 0; + u32 chanerr; + + /* have we already been set up? */ + if (ioat_chan->ring) + return 1 << ioat_chan->alloc_order; + + /* Setup register to interrupt and write completion status on error */ + writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); + + /* allocate a completion writeback area */ + /* doing 2 32bit writes to mmio since 1 64b write doesn't work */ + ioat_chan->completion = + pci_pool_alloc(ioat_chan->ioat_dma->completion_pool, + GFP_KERNEL, &ioat_chan->completion_dma); + if (!ioat_chan->completion) + return -ENOMEM; + + memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion)); + writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF, + ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW); + writel(((u64)ioat_chan->completion_dma) >> 32, + ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH); + + order = ioat_get_alloc_order(); + ring = ioat_alloc_ring(c, order, GFP_KERNEL); + if (!ring) + return -ENOMEM; + + spin_lock_bh(&ioat_chan->cleanup_lock); + spin_lock_bh(&ioat_chan->prep_lock); + ioat_chan->ring = ring; + ioat_chan->head = 0; + ioat_chan->issued = 0; + ioat_chan->tail = 0; + ioat_chan->alloc_order = order; + set_bit(IOAT_RUN, &ioat_chan->state); + spin_unlock_bh(&ioat_chan->prep_lock); + spin_unlock_bh(&ioat_chan->cleanup_lock); + + ioat_start_null_desc(ioat_chan); + + /* check that we got off the ground */ + do { + udelay(1); + status = ioat_chansts(ioat_chan); + } while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status)); + + if (is_ioat_active(status) || is_ioat_idle(status)) + return 1 << ioat_chan->alloc_order; + + chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); + + dev_WARN(to_dev(ioat_chan), + "failed to start channel chanerr: %#x\n", chanerr); + ioat_free_chan_resources(c); + return -EFAULT; +} + +bool reshape_ring(struct ioatdma_chan *ioat_chan, int order) +{ + /* reshape differs from normal ring allocation in that we want + * to allocate a new software ring while only + * extending/truncating the hardware ring + */ + struct dma_chan *c = &ioat_chan->dma_chan; + const u32 curr_size = ioat_ring_size(ioat_chan); + const u16 active = ioat_ring_active(ioat_chan); + const u32 new_size = 1 << order; + struct ioat_ring_ent **ring; + u32 i; + + if (order > ioat_get_max_alloc_order()) + return false; + + /* double check that we have at least 1 free descriptor */ + if (active == curr_size) + return false; + + /* when shrinking, verify that we can hold the current active + * set in the new ring + */ + if (active >= new_size) + return false; + + /* allocate the array to hold the software ring */ + ring = kcalloc(new_size, sizeof(*ring), GFP_NOWAIT); + if (!ring) + return false; + + /* allocate/trim descriptors as needed */ + if (new_size > curr_size) { + /* copy current descriptors to the new ring */ + for (i = 0; i < curr_size; i++) { + u16 curr_idx = (ioat_chan->tail+i) & (curr_size-1); + u16 new_idx = (ioat_chan->tail+i) & (new_size-1); + + ring[new_idx] = ioat_chan->ring[curr_idx]; + set_desc_id(ring[new_idx], new_idx); + } + + /* add new descriptors to the ring */ + for (i = curr_size; i < new_size; i++) { + u16 new_idx = (ioat_chan->tail+i) & (new_size-1); + + ring[new_idx] = ioat_alloc_ring_ent(c, GFP_NOWAIT); + if (!ring[new_idx]) { + while (i--) { + u16 new_idx = (ioat_chan->tail+i) & + (new_size-1); + + ioat_free_ring_ent(ring[new_idx], c); + } + kfree(ring); + return false; + } + set_desc_id(ring[new_idx], new_idx); + } + + /* hw link new descriptors */ + for (i = curr_size-1; i < new_size; i++) { + u16 new_idx = (ioat_chan->tail+i) & (new_size-1); + struct ioat_ring_ent *next = + ring[(new_idx+1) & (new_size-1)]; + struct ioat_dma_descriptor *hw = ring[new_idx]->hw; + + hw->next = next->txd.phys; + } + } else { + struct ioat_dma_descriptor *hw; + struct ioat_ring_ent *next; + + /* copy current descriptors to the new ring, dropping the + * removed descriptors + */ + for (i = 0; i < new_size; i++) { + u16 curr_idx = (ioat_chan->tail+i) & (curr_size-1); + u16 new_idx = (ioat_chan->tail+i) & (new_size-1); + + ring[new_idx] = ioat_chan->ring[curr_idx]; + set_desc_id(ring[new_idx], new_idx); + } + + /* free deleted descriptors */ + for (i = new_size; i < curr_size; i++) { + struct ioat_ring_ent *ent; + + ent = ioat_get_ring_ent(ioat_chan, ioat_chan->tail+i); + ioat_free_ring_ent(ent, c); + } + + /* fix up hardware ring */ + hw = ring[(ioat_chan->tail+new_size-1) & (new_size-1)]->hw; + next = ring[(ioat_chan->tail+new_size) & (new_size-1)]; + hw->next = next->txd.phys; + } + + dev_dbg(to_dev(ioat_chan), "%s: allocated %d descriptors\n", + __func__, new_size); + + kfree(ioat_chan->ring); + ioat_chan->ring = ring; + ioat_chan->alloc_order = order; + + return true; +} + +/** + * ioat_check_space_lock - verify space and grab ring producer lock + * @ioat: ioat,3 channel (ring) to operate on + * @num_descs: allocation length + */ +int ioat_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs) +{ + bool retry; + + retry: + spin_lock_bh(&ioat_chan->prep_lock); + /* never allow the last descriptor to be consumed, we need at + * least one free at all times to allow for on-the-fly ring + * resizing. + */ + if (likely(ioat_ring_space(ioat_chan) > num_descs)) { + dev_dbg(to_dev(ioat_chan), "%s: num_descs: %d (%x:%x:%x)\n", + __func__, num_descs, ioat_chan->head, + ioat_chan->tail, ioat_chan->issued); + ioat_chan->produce = num_descs; + return 0; /* with ioat->prep_lock held */ + } + retry = test_and_set_bit(IOAT_RESHAPE_PENDING, &ioat_chan->state); + spin_unlock_bh(&ioat_chan->prep_lock); + + /* is another cpu already trying to expand the ring? */ + if (retry) + goto retry; + + spin_lock_bh(&ioat_chan->cleanup_lock); + spin_lock_bh(&ioat_chan->prep_lock); + retry = reshape_ring(ioat_chan, ioat_chan->alloc_order + 1); + clear_bit(IOAT_RESHAPE_PENDING, &ioat_chan->state); + spin_unlock_bh(&ioat_chan->prep_lock); + spin_unlock_bh(&ioat_chan->cleanup_lock); + + /* if we were able to expand the ring retry the allocation */ + if (retry) + goto retry; + + dev_dbg_ratelimited(to_dev(ioat_chan), + "%s: ring full! num_descs: %d (%x:%x:%x)\n", + __func__, num_descs, ioat_chan->head, + ioat_chan->tail, ioat_chan->issued); + + /* progress reclaim in the allocation failure case we may be + * called under bh_disabled so we need to trigger the timer + * event directly + */ + if (time_is_before_jiffies(ioat_chan->timer.expires) + && timer_pending(&ioat_chan->timer)) { + struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma; + + mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); + ioat_dma->timer_fn((unsigned long)ioat_chan); + } + + return -ENOMEM; +} + +struct dma_async_tx_descriptor * +ioat_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, + dma_addr_t dma_src, size_t len, unsigned long flags) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + struct ioat_dma_descriptor *hw; + struct ioat_ring_ent *desc; + dma_addr_t dst = dma_dest; + dma_addr_t src = dma_src; + size_t total_len = len; + int num_descs, idx, i; + + num_descs = ioat_xferlen_to_descs(ioat_chan, len); + if (likely(num_descs) && + ioat_check_space_lock(ioat_chan, num_descs) == 0) + idx = ioat_chan->head; + else + return NULL; + i = 0; + do { + size_t copy = min_t(size_t, len, 1 << ioat_chan->xfercap_log); + + desc = ioat_get_ring_ent(ioat_chan, idx + i); + hw = desc->hw; + + hw->size = copy; + hw->ctl = 0; + hw->src_addr = src; + hw->dst_addr = dst; + + len -= copy; + dst += copy; + src += copy; + dump_desc_dbg(ioat_chan, desc); + } while (++i < num_descs); + + desc->txd.flags = flags; + desc->len = total_len; + hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); + hw->ctl_f.fence = !!(flags & DMA_PREP_FENCE); + hw->ctl_f.compl_write = 1; + dump_desc_dbg(ioat_chan, desc); + /* we leave the channel locked to ensure in order submission */ + + return &desc->txd; +} + +static ssize_t ring_size_show(struct dma_chan *c, char *page) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + + return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1); +} +static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size); + +static ssize_t ring_active_show(struct dma_chan *c, char *page) +{ + struct ioatdma_chan *ioat_chan = to_ioat_chan(c); + + /* ...taken outside the lock, no need to be precise */ + return sprintf(page, "%d\n", ioat_ring_active(ioat_chan)); +} +static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active); + +static struct attribute *ioat_attrs[] = { + &ring_size_attr.attr, + &ring_active_attr.attr, + &ioat_cap_attr.attr, + &ioat_version_attr.attr, + NULL, +}; + +struct kobj_type ioat_ktype = { + .sysfs_ops = &ioat_sysfs_ops, + .default_attrs = ioat_attrs, +}; diff --git a/drivers/dma/ioat/dma.h b/drivers/dma/ioat/dma.h index 11bbcf27f86f..2566ec6ae8a4 100644 --- a/drivers/dma/ioat/dma.h +++ b/drivers/dma/ioat/dma.h @@ -18,13 +18,14 @@ #define IOATDMA_H #include -#include "hw.h" -#include "registers.h" #include #include #include #include -#include +#include +#include +#include "registers.h" +#include "hw.h" #define IOAT_DMA_VERSION "4.00" @@ -154,6 +155,41 @@ struct ioat_sed_ent { unsigned int hw_pool; }; +/** + * struct ioat_ring_ent - wrapper around hardware descriptor + * @hw: hardware DMA descriptor (for memcpy) + * @fill: hardware fill descriptor + * @xor: hardware xor descriptor + * @xor_ex: hardware xor extension descriptor + * @pq: hardware pq descriptor + * @pq_ex: hardware pq extension descriptor + * @pqu: hardware pq update descriptor + * @raw: hardware raw (un-typed) descriptor + * @txd: the generic software descriptor for all engines + * @len: total transaction length for unmap + * @result: asynchronous result of validate operations + * @id: identifier for debug + */ + +struct ioat_ring_ent { + union { + struct ioat_dma_descriptor *hw; + struct ioat_xor_descriptor *xor; + struct ioat_xor_ext_descriptor *xor_ex; + struct ioat_pq_descriptor *pq; + struct ioat_pq_ext_descriptor *pq_ex; + struct ioat_pq_update_descriptor *pqu; + struct ioat_raw_descriptor *raw; + }; + size_t len; + struct dma_async_tx_descriptor txd; + enum sum_check_flags *result; + #ifdef DEBUG + int id; + #endif + struct ioat_sed_ent *sed; +}; + static inline struct ioatdma_chan *to_ioat_chan(struct dma_chan *c) { return container_of(c, struct ioatdma_chan, dma_chan); @@ -291,6 +327,60 @@ static inline bool is_ioat_bug(unsigned long err) return !!err; } +#define IOAT_MAX_ORDER 16 +#define ioat_get_alloc_order() \ + (min(ioat_ring_alloc_order, IOAT_MAX_ORDER)) +#define ioat_get_max_alloc_order() \ + (min(ioat_ring_max_alloc_order, IOAT_MAX_ORDER)) + +static inline u32 ioat_ring_size(struct ioatdma_chan *ioat_chan) +{ + return 1 << ioat_chan->alloc_order; +} + +/* count of descriptors in flight with the engine */ +static inline u16 ioat_ring_active(struct ioatdma_chan *ioat_chan) +{ + return CIRC_CNT(ioat_chan->head, ioat_chan->tail, + ioat_ring_size(ioat_chan)); +} + +/* count of descriptors pending submission to hardware */ +static inline u16 ioat_ring_pending(struct ioatdma_chan *ioat_chan) +{ + return CIRC_CNT(ioat_chan->head, ioat_chan->issued, + ioat_ring_size(ioat_chan)); +} + +static inline u32 ioat_ring_space(struct ioatdma_chan *ioat_chan) +{ + return ioat_ring_size(ioat_chan) - ioat_ring_active(ioat_chan); +} + +static inline u16 +ioat_xferlen_to_descs(struct ioatdma_chan *ioat_chan, size_t len) +{ + u16 num_descs = len >> ioat_chan->xfercap_log; + + num_descs += !!(len & ((1 << ioat_chan->xfercap_log) - 1)); + return num_descs; +} + +static inline struct ioat_ring_ent * +ioat_get_ring_ent(struct ioatdma_chan *ioat_chan, u16 idx) +{ + return ioat_chan->ring[idx & (ioat_ring_size(ioat_chan) - 1)]; +} + +static inline void +ioat_set_chainaddr(struct ioatdma_chan *ioat_chan, u64 addr) +{ + writel(addr & 0x00000000FFFFFFFF, + ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_LOW); + writel(addr >> 32, + ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_HIGH); +} + int ioat_probe(struct ioatdma_device *ioat_dma); int ioat_register(struct ioatdma_device *ioat_dma); int ioat_dma_self_test(struct ioatdma_device *ioat_dma); @@ -306,7 +396,30 @@ void ioat_kobject_add(struct ioatdma_device *ioat_dma, struct kobj_type *type); void ioat_kobject_del(struct ioatdma_device *ioat_dma); int ioat_dma_setup_interrupts(struct ioatdma_device *ioat_dma); void ioat_stop(struct ioatdma_chan *ioat_chan); +int ioat_dma_probe(struct ioatdma_device *ioat_dma, int dca); +int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca); +struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase); +int ioat_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs); +int ioat_enumerate_channels(struct ioatdma_device *ioat_dma); +struct dma_async_tx_descriptor * +ioat_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, + dma_addr_t dma_src, size_t len, unsigned long flags); +void ioat_issue_pending(struct dma_chan *chan); +int ioat_alloc_chan_resources(struct dma_chan *c); +void ioat_free_chan_resources(struct dma_chan *c); +void __ioat_restart_chan(struct ioatdma_chan *ioat_chan); +bool reshape_ring(struct ioatdma_chan *ioat, int order); +void __ioat_issue_pending(struct ioatdma_chan *ioat_chan); +void ioat_timer_event(unsigned long data); +int ioat_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo); +int ioat_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo); + extern const struct sysfs_ops ioat_sysfs_ops; extern struct ioat_sysfs_entry ioat_version_attr; extern struct ioat_sysfs_entry ioat_cap_attr; +extern int ioat_pending_level; +extern int ioat_ring_alloc_order; +extern struct kobj_type ioat_ktype; +extern struct kmem_cache *ioat_cache; + #endif /* IOATDMA_H */ diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c deleted file mode 100644 index 020c1fe31ca1..000000000000 --- a/drivers/dma/ioat/dma_v2.c +++ /dev/null @@ -1,695 +0,0 @@ -/* - * Intel I/OAT DMA Linux driver - * Copyright(c) 2004 - 2009 Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * The full GNU General Public License is included in this distribution in - * the file called "COPYING". - * - */ - -/* - * This driver supports an Intel I/OAT DMA engine (versions >= 2), which - * does asynchronous data movement and checksumming operations. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "dma.h" -#include "dma_v2.h" -#include "registers.h" -#include "hw.h" - -#include "../dmaengine.h" - -int ioat_ring_alloc_order = 8; -module_param(ioat_ring_alloc_order, int, 0644); -MODULE_PARM_DESC(ioat_ring_alloc_order, - "ioat2+: allocate 2^n descriptors per channel" - " (default: 8 max: 16)"); -static int ioat_ring_max_alloc_order = IOAT_MAX_ORDER; -module_param(ioat_ring_max_alloc_order, int, 0644); -MODULE_PARM_DESC(ioat_ring_max_alloc_order, - "ioat2+: upper limit for ring size (default: 16)"); - -void __ioat2_issue_pending(struct ioatdma_chan *ioat_chan) -{ - ioat_chan->dmacount += ioat2_ring_pending(ioat_chan); - ioat_chan->issued = ioat_chan->head; - writew(ioat_chan->dmacount, - ioat_chan->reg_base + IOAT_CHAN_DMACOUNT_OFFSET); - dev_dbg(to_dev(ioat_chan), - "%s: head: %#x tail: %#x issued: %#x count: %#x\n", - __func__, ioat_chan->head, ioat_chan->tail, - ioat_chan->issued, ioat_chan->dmacount); -} - -void ioat2_issue_pending(struct dma_chan *c) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - - if (ioat2_ring_pending(ioat_chan)) { - spin_lock_bh(&ioat_chan->prep_lock); - __ioat2_issue_pending(ioat_chan); - spin_unlock_bh(&ioat_chan->prep_lock); - } -} - -/** - * ioat2_update_pending - log pending descriptors - * @ioat: ioat2+ channel - * - * Check if the number of unsubmitted descriptors has exceeded the - * watermark. Called with prep_lock held - */ -static void ioat2_update_pending(struct ioatdma_chan *ioat_chan) -{ - if (ioat2_ring_pending(ioat_chan) > ioat_pending_level) - __ioat2_issue_pending(ioat_chan); -} - -static void __ioat2_start_null_desc(struct ioatdma_chan *ioat_chan) -{ - struct ioat_ring_ent *desc; - struct ioat_dma_descriptor *hw; - - if (ioat2_ring_space(ioat_chan) < 1) { - dev_err(to_dev(ioat_chan), - "Unable to start null desc - ring full\n"); - return; - } - - dev_dbg(to_dev(ioat_chan), - "%s: head: %#x tail: %#x issued: %#x\n", - __func__, ioat_chan->head, ioat_chan->tail, ioat_chan->issued); - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->head); - - hw = desc->hw; - hw->ctl = 0; - hw->ctl_f.null = 1; - hw->ctl_f.int_en = 1; - hw->ctl_f.compl_write = 1; - /* set size to non-zero value (channel returns error when size is 0) */ - hw->size = NULL_DESC_BUFFER_SIZE; - hw->src_addr = 0; - hw->dst_addr = 0; - async_tx_ack(&desc->txd); - ioat2_set_chainaddr(ioat_chan, desc->txd.phys); - dump_desc_dbg(ioat_chan, desc); - wmb(); - ioat_chan->head += 1; - __ioat2_issue_pending(ioat_chan); -} - -static void ioat2_start_null_desc(struct ioatdma_chan *ioat_chan) -{ - spin_lock_bh(&ioat_chan->prep_lock); - __ioat2_start_null_desc(ioat_chan); - spin_unlock_bh(&ioat_chan->prep_lock); -} - -void __ioat2_restart_chan(struct ioatdma_chan *ioat_chan) -{ - /* set the tail to be re-issued */ - ioat_chan->issued = ioat_chan->tail; - ioat_chan->dmacount = 0; - set_bit(IOAT_COMPLETION_PENDING, &ioat_chan->state); - mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); - - dev_dbg(to_dev(ioat_chan), - "%s: head: %#x tail: %#x issued: %#x count: %#x\n", - __func__, ioat_chan->head, ioat_chan->tail, - ioat_chan->issued, ioat_chan->dmacount); - - if (ioat2_ring_pending(ioat_chan)) { - struct ioat_ring_ent *desc; - - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->tail); - ioat2_set_chainaddr(ioat_chan, desc->txd.phys); - __ioat2_issue_pending(ioat_chan); - } else - __ioat2_start_null_desc(ioat_chan); -} - -int ioat2_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo) -{ - unsigned long end = jiffies + tmo; - int err = 0; - u32 status; - - status = ioat_chansts(ioat_chan); - if (is_ioat_active(status) || is_ioat_idle(status)) - ioat_suspend(ioat_chan); - while (is_ioat_active(status) || is_ioat_idle(status)) { - if (tmo && time_after(jiffies, end)) { - err = -ETIMEDOUT; - break; - } - status = ioat_chansts(ioat_chan); - cpu_relax(); - } - - return err; -} - -int ioat2_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo) -{ - unsigned long end = jiffies + tmo; - int err = 0; - - ioat_reset(ioat_chan); - while (ioat_reset_pending(ioat_chan)) { - if (end && time_after(jiffies, end)) { - err = -ETIMEDOUT; - break; - } - cpu_relax(); - } - - return err; -} - -/** - * ioat2_enumerate_channels - find and initialize the device's channels - * @ioat_dma: the ioat dma device to be enumerated - */ -int ioat2_enumerate_channels(struct ioatdma_device *ioat_dma) -{ - struct ioatdma_chan *ioat_chan; - struct device *dev = &ioat_dma->pdev->dev; - struct dma_device *dma = &ioat_dma->dma_dev; - u8 xfercap_log; - int i; - - INIT_LIST_HEAD(&dma->channels); - dma->chancnt = readb(ioat_dma->reg_base + IOAT_CHANCNT_OFFSET); - dma->chancnt &= 0x1f; /* bits [4:0] valid */ - if (dma->chancnt > ARRAY_SIZE(ioat_dma->idx)) { - dev_warn(dev, "(%d) exceeds max supported channels (%zu)\n", - dma->chancnt, ARRAY_SIZE(ioat_dma->idx)); - dma->chancnt = ARRAY_SIZE(ioat_dma->idx); - } - xfercap_log = readb(ioat_dma->reg_base + IOAT_XFERCAP_OFFSET); - xfercap_log &= 0x1f; /* bits [4:0] valid */ - if (xfercap_log == 0) - return 0; - dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); - - for (i = 0; i < dma->chancnt; i++) { - ioat_chan = devm_kzalloc(dev, sizeof(*ioat_chan), GFP_KERNEL); - if (!ioat_chan) - break; - - ioat_init_channel(ioat_dma, ioat_chan, i); - ioat_chan->xfercap_log = xfercap_log; - spin_lock_init(&ioat_chan->prep_lock); - if (ioat_dma->reset_hw(ioat_chan)) { - i = 0; - break; - } - } - dma->chancnt = i; - return i; -} - -static dma_cookie_t ioat2_tx_submit_unlock(struct dma_async_tx_descriptor *tx) -{ - struct dma_chan *c = tx->chan; - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - dma_cookie_t cookie; - - cookie = dma_cookie_assign(tx); - dev_dbg(to_dev(ioat_chan), "%s: cookie: %d\n", __func__, cookie); - - if (!test_and_set_bit(IOAT_CHAN_ACTIVE, &ioat_chan->state)) - mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); - - /* make descriptor updates visible before advancing ioat->head, - * this is purposefully not smp_wmb() since we are also - * publishing the descriptor updates to a dma device - */ - wmb(); - - ioat_chan->head += ioat_chan->produce; - - ioat2_update_pending(ioat_chan); - spin_unlock_bh(&ioat_chan->prep_lock); - - return cookie; -} - -static struct ioat_ring_ent *ioat2_alloc_ring_ent(struct dma_chan *chan, gfp_t flags) -{ - struct ioat_dma_descriptor *hw; - struct ioat_ring_ent *desc; - struct ioatdma_device *ioat_dma; - dma_addr_t phys; - - ioat_dma = to_ioatdma_device(chan->device); - hw = pci_pool_alloc(ioat_dma->dma_pool, flags, &phys); - if (!hw) - return NULL; - memset(hw, 0, sizeof(*hw)); - - desc = kmem_cache_zalloc(ioat2_cache, flags); - if (!desc) { - pci_pool_free(ioat_dma->dma_pool, hw, phys); - return NULL; - } - - dma_async_tx_descriptor_init(&desc->txd, chan); - desc->txd.tx_submit = ioat2_tx_submit_unlock; - desc->hw = hw; - desc->txd.phys = phys; - return desc; -} - -static void ioat2_free_ring_ent(struct ioat_ring_ent *desc, struct dma_chan *chan) -{ - struct ioatdma_device *ioat_dma; - - ioat_dma = to_ioatdma_device(chan->device); - pci_pool_free(ioat_dma->dma_pool, desc->hw, desc->txd.phys); - kmem_cache_free(ioat2_cache, desc); -} - -static struct ioat_ring_ent **ioat2_alloc_ring(struct dma_chan *c, int order, gfp_t flags) -{ - struct ioat_ring_ent **ring; - int descs = 1 << order; - int i; - - if (order > ioat_get_max_alloc_order()) - return NULL; - - /* allocate the array to hold the software ring */ - ring = kcalloc(descs, sizeof(*ring), flags); - if (!ring) - return NULL; - for (i = 0; i < descs; i++) { - ring[i] = ioat2_alloc_ring_ent(c, flags); - if (!ring[i]) { - while (i--) - ioat2_free_ring_ent(ring[i], c); - kfree(ring); - return NULL; - } - set_desc_id(ring[i], i); - } - - /* link descs */ - for (i = 0; i < descs-1; i++) { - struct ioat_ring_ent *next = ring[i+1]; - struct ioat_dma_descriptor *hw = ring[i]->hw; - - hw->next = next->txd.phys; - } - ring[i]->hw->next = ring[0]->txd.phys; - - return ring; -} - -void ioat2_free_chan_resources(struct dma_chan *c); - -/* ioat2_alloc_chan_resources - allocate/initialize ioat2 descriptor ring - * @chan: channel to be initialized - */ -int ioat2_alloc_chan_resources(struct dma_chan *c) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - struct ioat_ring_ent **ring; - u64 status; - int order; - int i = 0; - - /* have we already been set up? */ - if (ioat_chan->ring) - return 1 << ioat_chan->alloc_order; - - /* Setup register to interrupt and write completion status on error */ - writew(IOAT_CHANCTRL_RUN, ioat_chan->reg_base + IOAT_CHANCTRL_OFFSET); - - /* allocate a completion writeback area */ - /* doing 2 32bit writes to mmio since 1 64b write doesn't work */ - ioat_chan->completion = - pci_pool_alloc(ioat_chan->ioat_dma->completion_pool, - GFP_KERNEL, &ioat_chan->completion_dma); - if (!ioat_chan->completion) - return -ENOMEM; - - memset(ioat_chan->completion, 0, sizeof(*ioat_chan->completion)); - writel(((u64)ioat_chan->completion_dma) & 0x00000000FFFFFFFF, - ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_LOW); - writel(((u64)ioat_chan->completion_dma) >> 32, - ioat_chan->reg_base + IOAT_CHANCMP_OFFSET_HIGH); - - order = ioat_get_alloc_order(); - ring = ioat2_alloc_ring(c, order, GFP_KERNEL); - if (!ring) - return -ENOMEM; - - spin_lock_bh(&ioat_chan->cleanup_lock); - spin_lock_bh(&ioat_chan->prep_lock); - ioat_chan->ring = ring; - ioat_chan->head = 0; - ioat_chan->issued = 0; - ioat_chan->tail = 0; - ioat_chan->alloc_order = order; - set_bit(IOAT_RUN, &ioat_chan->state); - spin_unlock_bh(&ioat_chan->prep_lock); - spin_unlock_bh(&ioat_chan->cleanup_lock); - - ioat2_start_null_desc(ioat_chan); - - /* check that we got off the ground */ - do { - udelay(1); - status = ioat_chansts(ioat_chan); - } while (i++ < 20 && !is_ioat_active(status) && !is_ioat_idle(status)); - - if (is_ioat_active(status) || is_ioat_idle(status)) { - return 1 << ioat_chan->alloc_order; - } else { - u32 chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); - - dev_WARN(to_dev(ioat_chan), - "failed to start channel chanerr: %#x\n", chanerr); - ioat2_free_chan_resources(c); - return -EFAULT; - } -} - -bool reshape_ring(struct ioatdma_chan *ioat_chan, int order) -{ - /* reshape differs from normal ring allocation in that we want - * to allocate a new software ring while only - * extending/truncating the hardware ring - */ - struct dma_chan *c = &ioat_chan->dma_chan; - const u32 curr_size = ioat2_ring_size(ioat_chan); - const u16 active = ioat2_ring_active(ioat_chan); - const u32 new_size = 1 << order; - struct ioat_ring_ent **ring; - u32 i; - - if (order > ioat_get_max_alloc_order()) - return false; - - /* double check that we have at least 1 free descriptor */ - if (active == curr_size) - return false; - - /* when shrinking, verify that we can hold the current active - * set in the new ring - */ - if (active >= new_size) - return false; - - /* allocate the array to hold the software ring */ - ring = kcalloc(new_size, sizeof(*ring), GFP_NOWAIT); - if (!ring) - return false; - - /* allocate/trim descriptors as needed */ - if (new_size > curr_size) { - /* copy current descriptors to the new ring */ - for (i = 0; i < curr_size; i++) { - u16 curr_idx = (ioat_chan->tail+i) & (curr_size-1); - u16 new_idx = (ioat_chan->tail+i) & (new_size-1); - - ring[new_idx] = ioat_chan->ring[curr_idx]; - set_desc_id(ring[new_idx], new_idx); - } - - /* add new descriptors to the ring */ - for (i = curr_size; i < new_size; i++) { - u16 new_idx = (ioat_chan->tail+i) & (new_size-1); - - ring[new_idx] = ioat2_alloc_ring_ent(c, GFP_NOWAIT); - if (!ring[new_idx]) { - while (i--) { - u16 new_idx = (ioat_chan->tail+i) & - (new_size-1); - - ioat2_free_ring_ent(ring[new_idx], c); - } - kfree(ring); - return false; - } - set_desc_id(ring[new_idx], new_idx); - } - - /* hw link new descriptors */ - for (i = curr_size-1; i < new_size; i++) { - u16 new_idx = (ioat_chan->tail+i) & (new_size-1); - struct ioat_ring_ent *next = ring[(new_idx+1) & (new_size-1)]; - struct ioat_dma_descriptor *hw = ring[new_idx]->hw; - - hw->next = next->txd.phys; - } - } else { - struct ioat_dma_descriptor *hw; - struct ioat_ring_ent *next; - - /* copy current descriptors to the new ring, dropping the - * removed descriptors - */ - for (i = 0; i < new_size; i++) { - u16 curr_idx = (ioat_chan->tail+i) & (curr_size-1); - u16 new_idx = (ioat_chan->tail+i) & (new_size-1); - - ring[new_idx] = ioat_chan->ring[curr_idx]; - set_desc_id(ring[new_idx], new_idx); - } - - /* free deleted descriptors */ - for (i = new_size; i < curr_size; i++) { - struct ioat_ring_ent *ent; - - ent = ioat2_get_ring_ent(ioat_chan, ioat_chan->tail+i); - ioat2_free_ring_ent(ent, c); - } - - /* fix up hardware ring */ - hw = ring[(ioat_chan->tail+new_size-1) & (new_size-1)]->hw; - next = ring[(ioat_chan->tail+new_size) & (new_size-1)]; - hw->next = next->txd.phys; - } - - dev_dbg(to_dev(ioat_chan), "%s: allocated %d descriptors\n", - __func__, new_size); - - kfree(ioat_chan->ring); - ioat_chan->ring = ring; - ioat_chan->alloc_order = order; - - return true; -} - -/** - * ioat2_check_space_lock - verify space and grab ring producer lock - * @ioat: ioat2,3 channel (ring) to operate on - * @num_descs: allocation length - */ -int ioat2_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs) -{ - bool retry; - - retry: - spin_lock_bh(&ioat_chan->prep_lock); - /* never allow the last descriptor to be consumed, we need at - * least one free at all times to allow for on-the-fly ring - * resizing. - */ - if (likely(ioat2_ring_space(ioat_chan) > num_descs)) { - dev_dbg(to_dev(ioat_chan), "%s: num_descs: %d (%x:%x:%x)\n", - __func__, num_descs, ioat_chan->head, - ioat_chan->tail, ioat_chan->issued); - ioat_chan->produce = num_descs; - return 0; /* with ioat->prep_lock held */ - } - retry = test_and_set_bit(IOAT_RESHAPE_PENDING, &ioat_chan->state); - spin_unlock_bh(&ioat_chan->prep_lock); - - /* is another cpu already trying to expand the ring? */ - if (retry) - goto retry; - - spin_lock_bh(&ioat_chan->cleanup_lock); - spin_lock_bh(&ioat_chan->prep_lock); - retry = reshape_ring(ioat_chan, ioat_chan->alloc_order + 1); - clear_bit(IOAT_RESHAPE_PENDING, &ioat_chan->state); - spin_unlock_bh(&ioat_chan->prep_lock); - spin_unlock_bh(&ioat_chan->cleanup_lock); - - /* if we were able to expand the ring retry the allocation */ - if (retry) - goto retry; - - if (printk_ratelimit()) - dev_dbg(to_dev(ioat_chan), - "%s: ring full! num_descs: %d (%x:%x:%x)\n", - __func__, num_descs, ioat_chan->head, - ioat_chan->tail, ioat_chan->issued); - - /* progress reclaim in the allocation failure case we may be - * called under bh_disabled so we need to trigger the timer - * event directly - */ - if (time_is_before_jiffies(ioat_chan->timer.expires) - && timer_pending(&ioat_chan->timer)) { - struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma; - - mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); - ioat_dma->timer_fn((unsigned long)ioat_chan); - } - - return -ENOMEM; -} - -struct dma_async_tx_descriptor * -ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, - dma_addr_t dma_src, size_t len, unsigned long flags) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - struct ioat_dma_descriptor *hw; - struct ioat_ring_ent *desc; - dma_addr_t dst = dma_dest; - dma_addr_t src = dma_src; - size_t total_len = len; - int num_descs, idx, i; - - num_descs = ioat2_xferlen_to_descs(ioat_chan, len); - if (likely(num_descs) && - ioat2_check_space_lock(ioat_chan, num_descs) == 0) - idx = ioat_chan->head; - else - return NULL; - i = 0; - do { - size_t copy = min_t(size_t, len, 1 << ioat_chan->xfercap_log); - - desc = ioat2_get_ring_ent(ioat_chan, idx + i); - hw = desc->hw; - - hw->size = copy; - hw->ctl = 0; - hw->src_addr = src; - hw->dst_addr = dst; - - len -= copy; - dst += copy; - src += copy; - dump_desc_dbg(ioat_chan, desc); - } while (++i < num_descs); - - desc->txd.flags = flags; - desc->len = total_len; - hw->ctl_f.int_en = !!(flags & DMA_PREP_INTERRUPT); - hw->ctl_f.fence = !!(flags & DMA_PREP_FENCE); - hw->ctl_f.compl_write = 1; - dump_desc_dbg(ioat_chan, desc); - /* we leave the channel locked to ensure in order submission */ - - return &desc->txd; -} - -/** - * ioat2_free_chan_resources - release all the descriptors - * @chan: the channel to be cleaned - */ -void ioat2_free_chan_resources(struct dma_chan *c) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - struct ioatdma_device *ioat_dma = ioat_chan->ioat_dma; - struct ioat_ring_ent *desc; - const int total_descs = 1 << ioat_chan->alloc_order; - int descs; - int i; - - /* Before freeing channel resources first check - * if they have been previously allocated for this channel. - */ - if (!ioat_chan->ring) - return; - - ioat_stop(ioat_chan); - ioat_dma->reset_hw(ioat_chan); - - spin_lock_bh(&ioat_chan->cleanup_lock); - spin_lock_bh(&ioat_chan->prep_lock); - descs = ioat2_ring_space(ioat_chan); - dev_dbg(to_dev(ioat_chan), "freeing %d idle descriptors\n", descs); - for (i = 0; i < descs; i++) { - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->head + i); - ioat2_free_ring_ent(desc, c); - } - - if (descs < total_descs) - dev_err(to_dev(ioat_chan), "Freeing %d in use descriptors!\n", - total_descs - descs); - - for (i = 0; i < total_descs - descs; i++) { - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->tail + i); - dump_desc_dbg(ioat_chan, desc); - ioat2_free_ring_ent(desc, c); - } - - kfree(ioat_chan->ring); - ioat_chan->ring = NULL; - ioat_chan->alloc_order = 0; - pci_pool_free(ioat_dma->completion_pool, ioat_chan->completion, - ioat_chan->completion_dma); - spin_unlock_bh(&ioat_chan->prep_lock); - spin_unlock_bh(&ioat_chan->cleanup_lock); - - ioat_chan->last_completion = 0; - ioat_chan->completion_dma = 0; - ioat_chan->dmacount = 0; -} - -static ssize_t ring_size_show(struct dma_chan *c, char *page) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - - return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1); -} -static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size); - -static ssize_t ring_active_show(struct dma_chan *c, char *page) -{ - struct ioatdma_chan *ioat_chan = to_ioat_chan(c); - - /* ...taken outside the lock, no need to be precise */ - return sprintf(page, "%d\n", ioat2_ring_active(ioat_chan)); -} -static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active); - -static struct attribute *ioat2_attrs[] = { - &ring_size_attr.attr, - &ring_active_attr.attr, - &ioat_cap_attr.attr, - &ioat_version_attr.attr, - NULL, -}; - -struct kobj_type ioat2_ktype = { - .sysfs_ops = &ioat_sysfs_ops, - .default_attrs = ioat2_attrs, -}; diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h deleted file mode 100644 index 7d69ed3edab4..000000000000 --- a/drivers/dma/ioat/dma_v2.h +++ /dev/null @@ -1,143 +0,0 @@ -/* - * 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 of the GNU General Public License as published by the Free - * Software Foundation; either version 2 of the License, or (at your option) - * any later version. - * - * 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. - */ -#ifndef IOATDMA_V2_H -#define IOATDMA_V2_H - -#include -#include -#include "dma.h" -#include "hw.h" - - -extern int ioat_pending_level; -extern int ioat_ring_alloc_order; - -/* - * workaround for IOAT ver.3.0 null descriptor issue - * (channel returns error when size is 0) - */ -#define NULL_DESC_BUFFER_SIZE 1 - -#define IOAT_MAX_ORDER 16 -#define ioat_get_alloc_order() \ - (min(ioat_ring_alloc_order, IOAT_MAX_ORDER)) -#define ioat_get_max_alloc_order() \ - (min(ioat_ring_max_alloc_order, IOAT_MAX_ORDER)) - -static inline u32 ioat2_ring_size(struct ioatdma_chan *ioat_chan) -{ - return 1 << ioat_chan->alloc_order; -} - -/* count of descriptors in flight with the engine */ -static inline u16 ioat2_ring_active(struct ioatdma_chan *ioat_chan) -{ - return CIRC_CNT(ioat_chan->head, ioat_chan->tail, - ioat2_ring_size(ioat_chan)); -} - -/* count of descriptors pending submission to hardware */ -static inline u16 ioat2_ring_pending(struct ioatdma_chan *ioat_chan) -{ - return CIRC_CNT(ioat_chan->head, ioat_chan->issued, - ioat2_ring_size(ioat_chan)); -} - -static inline u32 ioat2_ring_space(struct ioatdma_chan *ioat_chan) -{ - return ioat2_ring_size(ioat_chan) - ioat2_ring_active(ioat_chan); -} - -static inline u16 -ioat2_xferlen_to_descs(struct ioatdma_chan *ioat_chan, size_t len) -{ - u16 num_descs = len >> ioat_chan->xfercap_log; - - num_descs += !!(len & ((1 << ioat_chan->xfercap_log) - 1)); - return num_descs; -} - -/** - * struct ioat_ring_ent - wrapper around hardware descriptor - * @hw: hardware DMA descriptor (for memcpy) - * @fill: hardware fill descriptor - * @xor: hardware xor descriptor - * @xor_ex: hardware xor extension descriptor - * @pq: hardware pq descriptor - * @pq_ex: hardware pq extension descriptor - * @pqu: hardware pq update descriptor - * @raw: hardware raw (un-typed) descriptor - * @txd: the generic software descriptor for all engines - * @len: total transaction length for unmap - * @result: asynchronous result of validate operations - * @id: identifier for debug - */ - -struct ioat_ring_ent { - union { - struct ioat_dma_descriptor *hw; - struct ioat_xor_descriptor *xor; - struct ioat_xor_ext_descriptor *xor_ex; - struct ioat_pq_descriptor *pq; - struct ioat_pq_ext_descriptor *pq_ex; - struct ioat_pq_update_descriptor *pqu; - struct ioat_raw_descriptor *raw; - }; - size_t len; - struct dma_async_tx_descriptor txd; - enum sum_check_flags *result; - #ifdef DEBUG - int id; - #endif - struct ioat_sed_ent *sed; -}; - -static inline struct ioat_ring_ent * -ioat2_get_ring_ent(struct ioatdma_chan *ioat_chan, u16 idx) -{ - return ioat_chan->ring[idx & (ioat2_ring_size(ioat_chan) - 1)]; -} - -static inline void -ioat2_set_chainaddr(struct ioatdma_chan *ioat_chan, u64 addr) -{ - writel(addr & 0x00000000FFFFFFFF, - ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_LOW); - writel(addr >> 32, - ioat_chan->reg_base + IOAT2_CHAINADDR_OFFSET_HIGH); -} - -int ioat2_dma_probe(struct ioatdma_device *ioat_dma, int dca); -int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca); -struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase); -int ioat2_check_space_lock(struct ioatdma_chan *ioat_chan, int num_descs); -int ioat2_enumerate_channels(struct ioatdma_device *ioat_dma); -struct dma_async_tx_descriptor * -ioat2_dma_prep_memcpy_lock(struct dma_chan *c, dma_addr_t dma_dest, - dma_addr_t dma_src, size_t len, unsigned long flags); -void ioat2_issue_pending(struct dma_chan *chan); -int ioat2_alloc_chan_resources(struct dma_chan *c); -void ioat2_free_chan_resources(struct dma_chan *c); -void __ioat2_restart_chan(struct ioatdma_chan *ioat_chan); -bool reshape_ring(struct ioatdma_chan *ioat, int order); -void __ioat2_issue_pending(struct ioatdma_chan *ioat_chan); -void ioat2_timer_event(unsigned long data); -int ioat2_quiesce(struct ioatdma_chan *ioat_chan, unsigned long tmo); -int ioat2_reset_sync(struct ioatdma_chan *ioat_chan, unsigned long tmo); -extern struct kobj_type ioat2_ktype; -extern struct kmem_cache *ioat2_cache; -#endif /* IOATDMA_V2_H */ diff --git a/drivers/dma/ioat/dma_v3.c b/drivers/dma/ioat/dma_v3.c index 8ad4b07e7b85..2a47f3968ce4 100644 --- a/drivers/dma/ioat/dma_v3.c +++ b/drivers/dma/ioat/dma_v3.c @@ -61,7 +61,6 @@ #include "registers.h" #include "hw.h" #include "dma.h" -#include "dma_v2.h" extern struct kmem_cache *ioat3_sed_cache; @@ -390,13 +389,13 @@ static void __cleanup(struct ioatdma_chan *ioat_chan, dma_addr_t phys_complete) if (!phys_complete) return; - active = ioat2_ring_active(ioat_chan); + active = ioat_ring_active(ioat_chan); for (i = 0; i < active && !seen_current; i++) { struct dma_async_tx_descriptor *tx; smp_read_barrier_depends(); - prefetch(ioat2_get_ring_ent(ioat_chan, idx + i + 1)); - desc = ioat2_get_ring_ent(ioat_chan, idx + i); + prefetch(ioat_get_ring_ent(ioat_chan, idx + i + 1)); + desc = ioat_get_ring_ent(ioat_chan, idx + i); dump_desc_dbg(ioat_chan, desc); /* set err stat if we are using dwbes */ @@ -479,11 +478,11 @@ static void ioat3_restart_channel(struct ioatdma_chan *ioat_chan) { u64 phys_complete; - ioat2_quiesce(ioat_chan, 0); + ioat_quiesce(ioat_chan, 0); if (ioat3_cleanup_preamble(ioat_chan, &phys_complete)) __cleanup(ioat_chan, phys_complete); - __ioat2_restart_chan(ioat_chan); + __ioat_restart_chan(ioat_chan); } static void ioat3_eh(struct ioatdma_chan *ioat_chan) @@ -507,7 +506,7 @@ static void ioat3_eh(struct ioatdma_chan *ioat_chan) dev_dbg(to_dev(ioat_chan), "%s: error = %x:%x\n", __func__, chanerr, chanerr_int); - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->tail); + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->tail); hw = desc->hw; dump_desc_dbg(ioat_chan, desc); @@ -561,7 +560,7 @@ static void ioat3_eh(struct ioatdma_chan *ioat_chan) static void check_active(struct ioatdma_chan *ioat_chan) { - if (ioat2_ring_active(ioat_chan)) { + if (ioat_ring_active(ioat_chan)) { mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); return; } @@ -625,7 +624,7 @@ static void ioat3_timer_event(unsigned long data) } - if (ioat2_ring_active(ioat_chan)) + if (ioat_ring_active(ioat_chan)) mod_timer(&ioat_chan->timer, jiffies + COMPLETION_TIMEOUT); else { spin_lock_bh(&ioat_chan->prep_lock); @@ -670,7 +669,7 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result, BUG_ON(src_cnt < 2); - num_descs = ioat2_xferlen_to_descs(ioat_chan, len); + num_descs = ioat_xferlen_to_descs(ioat_chan, len); /* we need 2x the number of descriptors to cover greater than 5 * sources */ @@ -686,7 +685,7 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result, * order. */ if (likely(num_descs) && - ioat2_check_space_lock(ioat_chan, num_descs+1) == 0) + ioat_check_space_lock(ioat_chan, num_descs+1) == 0) idx = ioat_chan->head; else return NULL; @@ -697,14 +696,14 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result, len, 1 << ioat_chan->xfercap_log); int s; - desc = ioat2_get_ring_ent(ioat_chan, idx + i); + desc = ioat_get_ring_ent(ioat_chan, 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_chan, idx + i + 1); + ext = ioat_get_ring_ent(ioat_chan, idx + i + 1); xor_ex = ext->xor_ex; descs[0] = (struct ioat_raw_descriptor *) xor; @@ -730,7 +729,7 @@ __ioat3_prep_xor_lock(struct dma_chan *c, enum sum_check_flags *result, xor->ctl_f.fence = !!(flags & DMA_PREP_FENCE); /* completion descriptor carries interrupt bit */ - compl_desc = ioat2_get_ring_ent(ioat_chan, idx + i); + compl_desc = ioat_get_ring_ent(ioat_chan, idx + i); compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT; hw = compl_desc->hw; hw->ctl = 0; @@ -854,7 +853,7 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result, */ BUG_ON(src_cnt + dmaf_continue(flags) < 2); - num_descs = ioat2_xferlen_to_descs(ioat_chan, len); + num_descs = ioat_xferlen_to_descs(ioat_chan, 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. @@ -872,7 +871,7 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result, * order. */ if (likely(num_descs) && - ioat2_check_space_lock(ioat_chan, num_descs + cb32) == 0) + ioat_check_space_lock(ioat_chan, num_descs + cb32) == 0) idx = ioat_chan->head; else return NULL; @@ -882,14 +881,14 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result, size_t xfer_size = min_t(size_t, len, 1 << ioat_chan->xfercap_log); - desc = ioat2_get_ring_ent(ioat_chan, idx + i); + desc = ioat_get_ring_ent(ioat_chan, 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_chan, idx + i + with_ext); + ext = ioat_get_ring_ent(ioat_chan, idx + i + with_ext); pq_ex = ext->pq_ex; descs[0] = (struct ioat_raw_descriptor *) pq; @@ -936,7 +935,7 @@ __ioat3_prep_pq_lock(struct dma_chan *c, enum sum_check_flags *result, compl_desc = desc; } else { /* completion descriptor carries interrupt bit */ - compl_desc = ioat2_get_ring_ent(ioat_chan, idx + i); + compl_desc = ioat_get_ring_ent(ioat_chan, idx + i); compl_desc->txd.flags = flags & DMA_PREP_INTERRUPT; hw = compl_desc->hw; hw->ctl = 0; @@ -972,13 +971,13 @@ __ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result, dev_dbg(to_dev(ioat_chan), "%s\n", __func__); - num_descs = ioat2_xferlen_to_descs(ioat_chan, len); + num_descs = ioat_xferlen_to_descs(ioat_chan, 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_chan, num_descs) == 0) + if (num_descs && ioat_check_space_lock(ioat_chan, num_descs) == 0) idx = ioat_chan->head; else return NULL; @@ -990,7 +989,7 @@ __ioat3_prep_pq16_lock(struct dma_chan *c, enum sum_check_flags *result, size_t xfer_size = min_t(size_t, len, 1 << ioat_chan->xfercap_log); - desc = ioat2_get_ring_ent(ioat_chan, idx + i); + desc = ioat_get_ring_ent(ioat_chan, idx + i); pq = desc->pq; descs[0] = (struct ioat_raw_descriptor *) pq; @@ -1177,8 +1176,8 @@ ioat3_prep_interrupt_lock(struct dma_chan *c, unsigned long flags) struct ioat_ring_ent *desc; struct ioat_dma_descriptor *hw; - if (ioat2_check_space_lock(ioat_chan, 1) == 0) - desc = ioat2_get_ring_ent(ioat_chan, ioat_chan->head); + if (ioat_check_space_lock(ioat_chan, 1) == 0) + desc = ioat_get_ring_ent(ioat_chan, ioat_chan->head); else return NULL; @@ -1533,7 +1532,7 @@ static int ioat3_reset_hw(struct ioatdma_chan *ioat_chan) u16 dev_id; int err; - ioat2_quiesce(ioat_chan, msecs_to_jiffies(100)); + ioat_quiesce(ioat_chan, msecs_to_jiffies(100)); chanerr = readl(ioat_chan->reg_base + IOAT_CHANERR_OFFSET); writel(chanerr, ioat_chan->reg_base + IOAT_CHANERR_OFFSET); @@ -1561,7 +1560,7 @@ static int ioat3_reset_hw(struct ioatdma_chan *ioat_chan) } } - err = ioat2_reset_sync(ioat_chan, msecs_to_jiffies(200)); + err = ioat_reset_sync(ioat_chan, msecs_to_jiffies(200)); if (!err) err = ioat3_irq_reinit(ioat_dma); @@ -1607,15 +1606,15 @@ int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) bool is_raid_device = false; int err; - ioat_dma->enumerate_channels = ioat2_enumerate_channels; + ioat_dma->enumerate_channels = ioat_enumerate_channels; ioat_dma->reset_hw = ioat3_reset_hw; ioat_dma->self_test = ioat3_dma_self_test; ioat_dma->intr_quirk = ioat3_intr_quirk; dma = &ioat_dma->dma_dev; - 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->device_prep_dma_memcpy = ioat_dma_prep_memcpy_lock; + dma->device_issue_pending = ioat_issue_pending; + dma->device_alloc_chan_resources = ioat_alloc_chan_resources; + dma->device_free_chan_resources = ioat_free_chan_resources; dma_cap_set(DMA_INTERRUPT, dma->cap_mask); dma->device_prep_dma_interrupt = ioat3_prep_interrupt_lock; @@ -1708,7 +1707,7 @@ int ioat3_dma_probe(struct ioatdma_device *ioat_dma, int dca) if (err) return err; - ioat_kobject_add(ioat_dma, &ioat2_ktype); + ioat_kobject_add(ioat_dma, &ioat_ktype); if (dca) ioat_dma->dca = ioat3_dca_init(pdev, ioat_dma->reg_base); diff --git a/drivers/dma/ioat/pci.c b/drivers/dma/ioat/pci.c index b979a667f501..0ee610224ecd 100644 --- a/drivers/dma/ioat/pci.c +++ b/drivers/dma/ioat/pci.c @@ -29,7 +29,6 @@ #include #include #include "dma.h" -#include "dma_v2.h" #include "registers.h" #include "hw.h" @@ -115,7 +114,7 @@ static int ioat_dca_enabled = 1; module_param(ioat_dca_enabled, int, 0644); MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)"); -struct kmem_cache *ioat2_cache; +struct kmem_cache *ioat_cache; struct kmem_cache *ioat3_sed_cache; #define DRV_NAME "ioatdma" @@ -246,14 +245,14 @@ static int __init ioat_init_module(void) pr_info("%s: Intel(R) QuickData Technology Driver %s\n", DRV_NAME, IOAT_DMA_VERSION); - ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent), + ioat_cache = kmem_cache_create("ioat", sizeof(struct ioat_ring_ent), 0, SLAB_HWCACHE_ALIGN, NULL); - if (!ioat2_cache) + if (!ioat_cache) return -ENOMEM; ioat3_sed_cache = KMEM_CACHE(ioat_sed_ent, 0); if (!ioat3_sed_cache) - goto err_ioat2_cache; + goto err_ioat_cache; err = pci_register_driver(&ioat_pci_driver); if (err) @@ -264,8 +263,8 @@ static int __init ioat_init_module(void) err_ioat3_cache: kmem_cache_destroy(ioat3_sed_cache); - err_ioat2_cache: - kmem_cache_destroy(ioat2_cache); + err_ioat_cache: + kmem_cache_destroy(ioat_cache); return err; } @@ -274,6 +273,6 @@ module_init(ioat_init_module); static void __exit ioat_exit_module(void) { pci_unregister_driver(&ioat_pci_driver); - kmem_cache_destroy(ioat2_cache); + kmem_cache_destroy(ioat_cache); } module_exit(ioat_exit_module);