#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
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)
{
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)
+static int ioat_dca_add_requester(struct dca_provider *dca, struct device *dev)
{
struct ioat_dca_priv *ioatdca = dca_priv(dca);
struct pci_dev *pdev;
return -EFAULT;
}
-static int ioat3_dca_remove_requester(struct dca_provider *dca,
+static int ioat_dca_remove_requester(struct dca_provider *dca,
struct device *dev)
{
struct ioat_dca_priv *ioatdca = dca_priv(dca);
return -ENODEV;
}
-static u8 ioat3_dca_get_tag(struct dca_provider *dca,
+static u8 ioat_dca_get_tag(struct dca_provider *dca,
struct device *dev,
int cpu)
{
return tag;
}
-static struct dca_ops ioat3_dca_ops = {
- .add_requester = ioat3_dca_add_requester,
- .remove_requester = ioat3_dca_remove_requester,
- .get_tag = ioat3_dca_get_tag,
+static struct dca_ops ioat_dca_ops = {
+ .add_requester = ioat_dca_add_requester,
+ .remove_requester = ioat_dca_remove_requester,
+ .get_tag = ioat_dca_get_tag,
.dev_managed = ioat_dca_dev_managed,
};
-static int ioat3_dca_count_dca_slots(void *iobase, u16 dca_offset)
+static int ioat_dca_count_dca_slots(void *iobase, u16 dca_offset)
{
int slots = 0;
u32 req;
(tag_map[4] == DCA_TAG_MAP_VALID));
}
-struct dca_provider *ioat3_dca_init(struct pci_dev *pdev, void __iomem *iobase)
+struct dca_provider *ioat_dca_init(struct pci_dev *pdev, void __iomem *iobase)
{
struct dca_provider *dca;
struct ioat_dca_priv *ioatdca;
if (dca_offset == 0)
return NULL;
- slots = ioat3_dca_count_dca_slots(iobase, dca_offset);
+ slots = ioat_dca_count_dca_slots(iobase, dca_offset);
if (slots == 0)
return NULL;
- dca = alloc_dca_provider(&ioat3_dca_ops,
+ dca = alloc_dca_provider(&ioat_dca_ops,
sizeof(*ioatdca)
+ (sizeof(struct ioat_dca_slot) * slots));
if (!dca)
projects / firefly-linux-kernel-4.4.55.git / blobdiff