From 7f832645d0e5a0431e4ee02bae98e47ded32ac6f Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Tue, 11 Aug 2015 08:48:16 -0700 Subject: [PATCH] dmaengine: ioatdma: remove ioatdma v2 registration Removal of support for ioatdma v2 device support. Signed-off-by: Dave Jiang Acked-by: Dan Williams Signed-off-by: Vinod Koul --- drivers/dma/ioat/dca.c | 200 ---------------------------------- drivers/dma/ioat/dma.c | 1 - drivers/dma/ioat/dma_v2.c | 222 -------------------------------------- drivers/dma/ioat/dma_v2.h | 2 - drivers/dma/ioat/pci.c | 4 +- 5 files changed, 1 insertion(+), 428 deletions(-) diff --git a/drivers/dma/ioat/dca.c b/drivers/dma/ioat/dca.c index b1cffd2429e4..540d94ce9736 100644 --- a/drivers/dma/ioat/dca.c +++ b/drivers/dma/ioat/dca.c @@ -118,30 +118,6 @@ struct ioat_dca_priv { struct ioat_dca_slot req_slots[0]; }; -static u8 ioat_dca_get_tag(struct dca_provider *dca, - struct device *dev, - int cpu) -{ - struct ioat_dca_priv *ioatdca = dca_priv(dca); - int i, apic_id, bit, value; - u8 entry, tag; - - tag = 0; - apic_id = cpu_physical_id(cpu); - - for (i = 0; i < IOAT_TAG_MAP_LEN; i++) { - entry = ioatdca->tag_map[i]; - if (entry & DCA_TAG_MAP_VALID) { - bit = entry & ~DCA_TAG_MAP_VALID; - value = (apic_id & (1 << bit)) ? 1 : 0; - } else { - value = entry ? 1 : 0; - } - tag |= (value << i); - } - return tag; -} - static int ioat_dca_dev_managed(struct dca_provider *dca, struct device *dev) { @@ -157,182 +133,6 @@ static int ioat_dca_dev_managed(struct dca_provider *dca, return 0; } -static int ioat2_dca_add_requester(struct dca_provider *dca, struct device *dev) -{ - struct ioat_dca_priv *ioatdca = dca_priv(dca); - struct pci_dev *pdev; - int i; - u16 id; - u16 global_req_table; - - /* This implementation only supports PCI-Express */ - if (!dev_is_pci(dev)) - return -ENODEV; - pdev = to_pci_dev(dev); - id = dcaid_from_pcidev(pdev); - - if (ioatdca->requester_count == ioatdca->max_requesters) - return -ENODEV; - - for (i = 0; i < ioatdca->max_requesters; i++) { - if (ioatdca->req_slots[i].pdev == NULL) { - /* found an empty slot */ - ioatdca->requester_count++; - ioatdca->req_slots[i].pdev = pdev; - ioatdca->req_slots[i].rid = id; - global_req_table = - readw(ioatdca->dca_base + IOAT_DCA_GREQID_OFFSET); - writel(id | IOAT_DCA_GREQID_VALID, - ioatdca->iobase + global_req_table + (i * 4)); - return i; - } - } - /* Error, ioatdma->requester_count is out of whack */ - return -EFAULT; -} - -static int ioat2_dca_remove_requester(struct dca_provider *dca, - struct device *dev) -{ - struct ioat_dca_priv *ioatdca = dca_priv(dca); - struct pci_dev *pdev; - int i; - u16 global_req_table; - - /* This implementation only supports PCI-Express */ - if (!dev_is_pci(dev)) - return -ENODEV; - pdev = to_pci_dev(dev); - - for (i = 0; i < ioatdca->max_requesters; i++) { - if (ioatdca->req_slots[i].pdev == pdev) { - global_req_table = - readw(ioatdca->dca_base + IOAT_DCA_GREQID_OFFSET); - writel(0, ioatdca->iobase + global_req_table + (i * 4)); - ioatdca->req_slots[i].pdev = NULL; - ioatdca->req_slots[i].rid = 0; - ioatdca->requester_count--; - return i; - } - } - return -ENODEV; -} - -static u8 ioat2_dca_get_tag(struct dca_provider *dca, - struct device *dev, - int cpu) -{ - u8 tag; - - tag = ioat_dca_get_tag(dca, dev, cpu); - tag = (~tag) & 0x1F; - return tag; -} - -static struct dca_ops ioat2_dca_ops = { - .add_requester = ioat2_dca_add_requester, - .remove_requester = ioat2_dca_remove_requester, - .get_tag = ioat2_dca_get_tag, - .dev_managed = ioat_dca_dev_managed, -}; - -static int ioat2_dca_count_dca_slots(void __iomem *iobase, u16 dca_offset) -{ - int slots = 0; - u32 req; - u16 global_req_table; - - global_req_table = readw(iobase + dca_offset + IOAT_DCA_GREQID_OFFSET); - if (global_req_table == 0) - return 0; - do { - req = readl(iobase + global_req_table + (slots * sizeof(u32))); - slots++; - } while ((req & IOAT_DCA_GREQID_LASTID) == 0); - - return slots; -} - -struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase) -{ - struct dca_provider *dca; - struct ioat_dca_priv *ioatdca; - int slots; - int i; - int err; - u32 tag_map; - u16 dca_offset; - u16 csi_fsb_control; - u16 pcie_control; - u8 bit; - - if (!system_has_dca_enabled(pdev)) - return NULL; - - dca_offset = readw(iobase + IOAT_DCAOFFSET_OFFSET); - if (dca_offset == 0) - return NULL; - - slots = ioat2_dca_count_dca_slots(iobase, dca_offset); - if (slots == 0) - return NULL; - - dca = alloc_dca_provider(&ioat2_dca_ops, - sizeof(*ioatdca) - + (sizeof(struct ioat_dca_slot) * slots)); - if (!dca) - return NULL; - - ioatdca = dca_priv(dca); - ioatdca->iobase = iobase; - ioatdca->dca_base = iobase + dca_offset; - ioatdca->max_requesters = slots; - - /* some bios might not know to turn these on */ - csi_fsb_control = readw(ioatdca->dca_base + IOAT_FSB_CAP_ENABLE_OFFSET); - if ((csi_fsb_control & IOAT_FSB_CAP_ENABLE_PREFETCH) == 0) { - csi_fsb_control |= IOAT_FSB_CAP_ENABLE_PREFETCH; - writew(csi_fsb_control, - ioatdca->dca_base + IOAT_FSB_CAP_ENABLE_OFFSET); - } - pcie_control = readw(ioatdca->dca_base + IOAT_PCI_CAP_ENABLE_OFFSET); - if ((pcie_control & IOAT_PCI_CAP_ENABLE_MEMWR) == 0) { - pcie_control |= IOAT_PCI_CAP_ENABLE_MEMWR; - writew(pcie_control, - ioatdca->dca_base + IOAT_PCI_CAP_ENABLE_OFFSET); - } - - - /* TODO version, compatibility and configuration checks */ - - /* copy out the APIC to DCA tag map */ - tag_map = readl(ioatdca->dca_base + IOAT_APICID_TAG_MAP_OFFSET); - for (i = 0; i < 5; i++) { - bit = (tag_map >> (4 * i)) & 0x0f; - if (bit < 8) - ioatdca->tag_map[i] = bit | DCA_TAG_MAP_VALID; - else - ioatdca->tag_map[i] = 0; - } - - if (!dca2_tag_map_valid(ioatdca->tag_map)) { - WARN_TAINT_ONCE(1, TAINT_FIRMWARE_WORKAROUND, - "%s %s: APICID_TAG_MAP set incorrectly by BIOS, disabling DCA\n", - dev_driver_string(&pdev->dev), - dev_name(&pdev->dev)); - free_dca_provider(dca); - return NULL; - } - - err = register_dca_provider(dca, &pdev->dev); - if (err) { - free_dca_provider(dca); - return NULL; - } - - return dca; -} - static int ioat3_dca_add_requester(struct dca_provider *dca, struct device *dev) { struct ioat_dca_priv *ioatdca = dca_priv(dca); diff --git a/drivers/dma/ioat/dma.c b/drivers/dma/ioat/dma.c index f40768dfc3e6..fe63ff8c1c00 100644 --- a/drivers/dma/ioat/dma.c +++ b/drivers/dma/ioat/dma.c @@ -31,7 +31,6 @@ #include #include #include -#include #include "dma.h" #include "registers.h" #include "hw.h" diff --git a/drivers/dma/ioat/dma_v2.c b/drivers/dma/ioat/dma_v2.c index 0fba93c2feb4..2467298843ea 100644 --- a/drivers/dma/ioat/dma_v2.c +++ b/drivers/dma/ioat/dma_v2.c @@ -31,7 +31,6 @@ #include #include #include -#include #include "dma.h" #include "dma_v2.h" #include "registers.h" @@ -124,76 +123,6 @@ static void ioat2_start_null_desc(struct ioat2_dma_chan *ioat) spin_unlock_bh(&ioat->prep_lock); } -static void __cleanup(struct ioat2_dma_chan *ioat, dma_addr_t phys_complete) -{ - struct ioat_chan_common *chan = &ioat->base; - struct dma_async_tx_descriptor *tx; - struct ioat_ring_ent *desc; - bool seen_current = false; - u16 active; - int idx = ioat->tail, i; - - dev_dbg(to_dev(chan), "%s: head: %#x tail: %#x issued: %#x\n", - __func__, ioat->head, ioat->tail, ioat->issued); - - active = ioat2_ring_active(ioat); - for (i = 0; i < active && !seen_current; i++) { - smp_read_barrier_depends(); - prefetch(ioat2_get_ring_ent(ioat, idx + i + 1)); - desc = ioat2_get_ring_ent(ioat, idx + i); - tx = &desc->txd; - dump_desc_dbg(ioat, desc); - if (tx->cookie) { - dma_descriptor_unmap(tx); - dma_cookie_complete(tx); - if (tx->callback) { - tx->callback(tx->callback_param); - tx->callback = NULL; - } - } - - if (tx->phys == phys_complete) - seen_current = true; - } - smp_mb(); /* finish all descriptor reads before incrementing tail */ - ioat->tail = idx + i; - BUG_ON(active && !seen_current); /* no active descs have written a completion? */ - - chan->last_completion = phys_complete; - if (active - i == 0) { - dev_dbg(to_dev(chan), "%s: cancel completion timeout\n", - __func__); - clear_bit(IOAT_COMPLETION_PENDING, &chan->state); - mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); - } -} - -/** - * ioat2_cleanup - clean finished descriptors (advance tail pointer) - * @chan: ioat channel to be cleaned up - */ -static void ioat2_cleanup(struct ioat2_dma_chan *ioat) -{ - struct ioat_chan_common *chan = &ioat->base; - dma_addr_t phys_complete; - - spin_lock_bh(&chan->cleanup_lock); - if (ioat_cleanup_preamble(chan, &phys_complete)) - __cleanup(ioat, phys_complete); - spin_unlock_bh(&chan->cleanup_lock); -} - -void ioat2_cleanup_event(unsigned long data) -{ - struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data); - struct ioat_chan_common *chan = &ioat->base; - - ioat2_cleanup(ioat); - if (!test_bit(IOAT_RUN, &chan->state)) - return; - writew(IOAT_CHANCTRL_RUN, ioat->base.reg_base + IOAT_CHANCTRL_OFFSET); -} - void __ioat2_restart_chan(struct ioat2_dma_chan *ioat) { struct ioat_chan_common *chan = &ioat->base; @@ -256,110 +185,6 @@ int ioat2_reset_sync(struct ioat_chan_common *chan, unsigned long tmo) return err; } -static void ioat2_restart_channel(struct ioat2_dma_chan *ioat) -{ - struct ioat_chan_common *chan = &ioat->base; - dma_addr_t phys_complete; - - ioat2_quiesce(chan, 0); - if (ioat_cleanup_preamble(chan, &phys_complete)) - __cleanup(ioat, phys_complete); - - __ioat2_restart_chan(ioat); -} - -static void check_active(struct ioat2_dma_chan *ioat) -{ - struct ioat_chan_common *chan = &ioat->base; - - if (ioat2_ring_active(ioat)) { - mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); - return; - } - - if (test_and_clear_bit(IOAT_CHAN_ACTIVE, &chan->state)) - mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); - else if (ioat->alloc_order > ioat_get_alloc_order()) { - /* if the ring is idle, empty, and oversized try to step - * down the size - */ - reshape_ring(ioat, ioat->alloc_order - 1); - - /* keep shrinking until we get back to our minimum - * default size - */ - if (ioat->alloc_order > ioat_get_alloc_order()) - mod_timer(&chan->timer, jiffies + IDLE_TIMEOUT); - } - -} - -void ioat2_timer_event(unsigned long data) -{ - struct ioat2_dma_chan *ioat = to_ioat2_chan((void *) data); - struct ioat_chan_common *chan = &ioat->base; - dma_addr_t phys_complete; - u64 status; - - status = ioat_chansts(chan); - - /* when halted due to errors check for channel - * programming errors before advancing the completion state - */ - if (is_ioat_halted(status)) { - u32 chanerr; - - chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); - dev_err(to_dev(chan), "%s: Channel halted (%x)\n", - __func__, chanerr); - if (test_bit(IOAT_RUN, &chan->state)) - BUG_ON(is_ioat_bug(chanerr)); - else /* we never got off the ground */ - return; - } - - /* if we haven't made progress and we have already - * acknowledged a pending completion once, then be more - * forceful with a restart - */ - spin_lock_bh(&chan->cleanup_lock); - if (ioat_cleanup_preamble(chan, &phys_complete)) - __cleanup(ioat, phys_complete); - else if (test_bit(IOAT_COMPLETION_ACK, &chan->state)) { - spin_lock_bh(&ioat->prep_lock); - ioat2_restart_channel(ioat); - spin_unlock_bh(&ioat->prep_lock); - spin_unlock_bh(&chan->cleanup_lock); - return; - } else { - set_bit(IOAT_COMPLETION_ACK, &chan->state); - mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); - } - - - if (ioat2_ring_active(ioat)) - mod_timer(&chan->timer, jiffies + COMPLETION_TIMEOUT); - else { - spin_lock_bh(&ioat->prep_lock); - check_active(ioat); - spin_unlock_bh(&ioat->prep_lock); - } - spin_unlock_bh(&chan->cleanup_lock); -} - -static int ioat2_reset_hw(struct ioat_chan_common *chan) -{ - /* throw away whatever the channel was doing and get it initialized */ - u32 chanerr; - - ioat2_quiesce(chan, msecs_to_jiffies(100)); - - chanerr = readl(chan->reg_base + IOAT_CHANERR_OFFSET); - writel(chanerr, chan->reg_base + IOAT_CHANERR_OFFSET); - - return ioat2_reset_sync(chan, msecs_to_jiffies(200)); -} - /** * ioat2_enumerate_channels - find and initialize the device's channels * @device: the device to be enumerated @@ -386,11 +211,6 @@ int ioat2_enumerate_channels(struct ioatdma_device *device) return 0; dev_dbg(dev, "%s: xfercap = %d\n", __func__, 1 << xfercap_log); - /* FIXME which i/oat version is i7300? */ -#ifdef CONFIG_I7300_IDLE_IOAT_CHANNEL - if (i7300_idle_platform_probe(NULL, NULL, 1) == 0) - dma->chancnt--; -#endif for (i = 0; i < dma->chancnt; i++) { ioat = devm_kzalloc(dev, sizeof(*ioat), GFP_KERNEL); if (!ioat) @@ -872,45 +692,3 @@ struct kobj_type ioat2_ktype = { .sysfs_ops = &ioat_sysfs_ops, .default_attrs = ioat2_attrs, }; - -int ioat2_dma_probe(struct ioatdma_device *device, int dca) -{ - struct pci_dev *pdev = device->pdev; - struct dma_device *dma; - struct dma_chan *c; - struct ioat_chan_common *chan; - int err; - - device->enumerate_channels = ioat2_enumerate_channels; - device->reset_hw = ioat2_reset_hw; - device->cleanup_fn = ioat2_cleanup_event; - device->timer_fn = ioat2_timer_event; - device->self_test = ioat_dma_self_test; - dma = &device->common; - dma->device_prep_dma_memcpy = ioat2_dma_prep_memcpy_lock; - dma->device_issue_pending = ioat2_issue_pending; - dma->device_alloc_chan_resources = ioat2_alloc_chan_resources; - dma->device_free_chan_resources = ioat2_free_chan_resources; - dma->device_tx_status = ioat_dma_tx_status; - - err = ioat_probe(device); - if (err) - return err; - - list_for_each_entry(c, &dma->channels, device_node) { - chan = to_chan_common(c); - writel(IOAT_DCACTRL_CMPL_WRITE_ENABLE | IOAT_DMA_DCA_ANY_CPU, - chan->reg_base + IOAT_DCACTRL_OFFSET); - } - - err = ioat_register(device); - if (err) - return err; - - ioat_kobject_add(device, &ioat2_ktype); - - if (dca) - device->dca = ioat2_dca_init(pdev, device->reg_base); - - return err; -} diff --git a/drivers/dma/ioat/dma_v2.h b/drivers/dma/ioat/dma_v2.h index bf24ebe874b0..b7d35839e68b 100644 --- a/drivers/dma/ioat/dma_v2.h +++ b/drivers/dma/ioat/dma_v2.h @@ -153,7 +153,6 @@ static inline void ioat2_set_chainaddr(struct ioat2_dma_chan *ioat, u64 addr) int ioat2_dma_probe(struct ioatdma_device *dev, int dca); int ioat3_dma_probe(struct ioatdma_device *dev, int dca); -struct dca_provider *ioat2_dca_init(struct pci_dev *pdev, void __iomem *iobase); struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase); int ioat2_check_space_lock(struct ioat2_dma_chan *ioat, int num_descs); int ioat2_enumerate_channels(struct ioatdma_device *device); @@ -166,7 +165,6 @@ void ioat2_free_chan_resources(struct dma_chan *c); void __ioat2_restart_chan(struct ioat2_dma_chan *ioat); bool reshape_ring(struct ioat2_dma_chan *ioat, int order); void __ioat2_issue_pending(struct ioat2_dma_chan *ioat); -void ioat2_cleanup_event(unsigned long data); void ioat2_timer_event(unsigned long data); int ioat2_quiesce(struct ioat_chan_common *chan, unsigned long tmo); int ioat2_reset_sync(struct ioat_chan_common *chan, unsigned long tmo); diff --git a/drivers/dma/ioat/pci.c b/drivers/dma/ioat/pci.c index 130db77120aa..b979a667f501 100644 --- a/drivers/dma/ioat/pci.c +++ b/drivers/dma/ioat/pci.c @@ -210,9 +210,7 @@ static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_drvdata(pdev, device); device->version = readb(device->reg_base + IOAT_VER_OFFSET); - if (device->version == IOAT_VER_2_0) - err = ioat2_dma_probe(device, ioat_dca_enabled); - else if (device->version >= IOAT_VER_3_0) + if (device->version >= IOAT_VER_3_0) err = ioat3_dma_probe(device, ioat_dca_enabled); else return -ENODEV; -- 2.20.1