dmaengine: ioatdma: remove ioatdma v2 registration

Removal of support for ioatdma v2 device support.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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);

drivers/dma/ioat/dma.c

@@ -31,7 +31,6 @@
 #include <linux/dma-mapping.h>
 #include <linux/workqueue.h>
 #include <linux/prefetch.h>
-#include <linux/i7300_idle.h>
 #include "dma.h"
 #include "registers.h"
 #include "hw.h"