/*
- * HP AGPGART routines.
+ * HP AGPGART routines.
+ * Copyright (C) 2002-2003 Hewlett-Packard Co
+ * Bjorn Helgaas <bjorn_helgaas@hp.com>
*/
+#include <linux/acpi.h>
+#include <linux/agp_backend.h>
+#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/agp_backend.h>
+
+#include <asm/acpi-ext.h>
+
#include "agp.h"
#ifndef log2
#define log2(x) ffz(~(x))
#endif
+#define HP_ZX1_IOC_OFFSET 0x1000 /* ACPI reports SBA, we want IOC */
+
+/* HP ZX1 IOC registers */
+#define HP_ZX1_IBASE 0x300
+#define HP_ZX1_IMASK 0x308
+#define HP_ZX1_PCOM 0x310
+#define HP_ZX1_TCNFG 0x318
+#define HP_ZX1_PDIR_BASE 0x320
+
+/* HP ZX1 LBA registers */
+#define HP_ZX1_AGP_STATUS 0x64
+#define HP_ZX1_AGP_COMMAND 0x68
+
#define HP_ZX1_IOVA_BASE GB(1UL)
#define HP_ZX1_IOVA_SIZE GB(1UL)
#define HP_ZX1_GART_SIZE (HP_ZX1_IOVA_SIZE / 2)
#define HP_ZX1_PDIR_VALID_BIT 0x8000000000000000UL
#define HP_ZX1_IOVA_TO_PDIR(va) ((va - hp_private.iova_base) >> hp_private.io_tlb_shift)
+/* AGP bridge need not be PCI device, but DRM thinks it is. */
+static struct pci_dev fake_bridge_dev;
+
static struct aper_size_info_fixed hp_zx1_sizes[] =
{
{0, 0, 0}, /* filled in by hp_zx1_fetch_size() */
};
static struct _hp_private {
- struct pci_dev *ioc;
- volatile u8 *registers;
+ volatile u8 *ioc_regs;
+ volatile u8 *lba_regs;
u64 *io_pdir; // PDIR for entire IOVA
u64 *gatt; // PDIR just for GART (subset of above)
u64 gatt_entries;
int io_pages_per_kpage;
} hp_private;
-static int __init hp_zx1_ioc_shared(void)
+static int __init
+hp_zx1_ioc_shared (void)
{
struct _hp_private *hp = &hp_private;
* - IOVA space is 1Gb in size
* - first 512Mb is IOMMU, second 512Mb is GART
*/
- hp->io_tlb_ps = INREG64(hp->registers, HP_ZX1_TCNFG);
+ hp->io_tlb_ps = INREG64(hp->ioc_regs, HP_ZX1_TCNFG);
switch (hp->io_tlb_ps) {
case 0: hp->io_tlb_shift = 12; break;
case 1: hp->io_tlb_shift = 13; break;
hp->io_page_size = 1 << hp->io_tlb_shift;
hp->io_pages_per_kpage = PAGE_SIZE / hp->io_page_size;
- hp->iova_base = INREG64(hp->registers, HP_ZX1_IBASE) & ~0x1;
+ hp->iova_base = INREG64(hp->ioc_regs, HP_ZX1_IBASE) & ~0x1;
hp->gart_base = hp->iova_base + HP_ZX1_IOVA_SIZE - HP_ZX1_GART_SIZE;
hp->gart_size = HP_ZX1_GART_SIZE;
hp->gatt_entries = hp->gart_size / hp->io_page_size;
- hp->io_pdir = phys_to_virt(INREG64(hp->registers, HP_ZX1_PDIR_BASE));
+ hp->io_pdir = phys_to_virt(INREG64(hp->ioc_regs, HP_ZX1_PDIR_BASE));
hp->gatt = &hp->io_pdir[HP_ZX1_IOVA_TO_PDIR(hp->gart_base)];
if (hp->gatt[0] != HP_ZX1_SBA_IOMMU_COOKIE) {
return 0;
}
-static int __init hp_zx1_ioc_owner(u8 ioc_rev)
+static int __init
+hp_zx1_ioc_owner (void)
{
struct _hp_private *hp = &hp_private;
return 0;
}
-static int __init hp_zx1_ioc_init(void)
+static int __init
+hp_zx1_ioc_init (u64 ioc_hpa, u64 lba_hpa)
{
struct _hp_private *hp = &hp_private;
- struct pci_dev *ioc;
- int i;
- u8 ioc_rev;
-
- ioc = pci_find_device(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_ZX1_IOC, NULL);
- if (!ioc) {
- printk(KERN_ERR PFX "Detected HP ZX1 AGP bridge but no IOC\n");
- return -ENODEV;
- }
- hp->ioc = ioc;
- pci_read_config_byte(ioc, PCI_REVISION_ID, &ioc_rev);
-
- for (i = 0; i < PCI_NUM_RESOURCES; i++) {
- if (pci_resource_flags(ioc, i) == IORESOURCE_MEM) {
- hp->registers = (u8 *) ioremap(pci_resource_start(ioc, i),
- pci_resource_len(ioc, i));
- break;
- }
- }
- if (!hp->registers) {
- printk(KERN_ERR PFX "Detected HP ZX1 AGP bridge but no CSRs\n");
- return -ENODEV;
- }
+ hp->ioc_regs = ioremap(ioc_hpa, 1024);
+ hp->lba_regs = ioremap(lba_hpa, 256);
/*
* If the IOTLB is currently disabled, we can take it over.
* Otherwise, we have to share with sba_iommu.
*/
- hp->io_pdir_owner = (INREG64(hp->registers, HP_ZX1_IBASE) & 0x1) == 0;
+ hp->io_pdir_owner = (INREG64(hp->ioc_regs, HP_ZX1_IBASE) & 0x1) == 0;
if (hp->io_pdir_owner)
- return hp_zx1_ioc_owner(ioc_rev);
+ return hp_zx1_ioc_owner();
return hp_zx1_ioc_shared();
}
-static int hp_zx1_fetch_size(void)
+static int
+hp_zx1_fetch_size (void)
{
int size;
return size;
}
-static int hp_zx1_configure(void)
+static int
+hp_zx1_configure (void)
{
struct _hp_private *hp = &hp_private;
agp_bridge->gart_bus_addr = hp->gart_base;
- agp_bridge->capndx = pci_find_capability(agp_bridge->dev, PCI_CAP_ID_AGP);
- pci_read_config_dword(agp_bridge->dev,
- agp_bridge->capndx + PCI_AGP_STATUS, &agp_bridge->mode);
+ agp_bridge->mode = INREG32(hp->lba_regs, HP_ZX1_AGP_STATUS);
if (hp->io_pdir_owner) {
- OUTREG64(hp->registers, HP_ZX1_PDIR_BASE,
+ OUTREG64(hp->ioc_regs, HP_ZX1_PDIR_BASE,
virt_to_phys(hp->io_pdir));
- OUTREG64(hp->registers, HP_ZX1_TCNFG, hp->io_tlb_ps);
- OUTREG64(hp->registers, HP_ZX1_IMASK, ~(HP_ZX1_IOVA_SIZE - 1));
- OUTREG64(hp->registers, HP_ZX1_IBASE, hp->iova_base | 0x1);
- OUTREG64(hp->registers, HP_ZX1_PCOM,
+ OUTREG64(hp->ioc_regs, HP_ZX1_TCNFG, hp->io_tlb_ps);
+ OUTREG64(hp->ioc_regs, HP_ZX1_IMASK, ~(HP_ZX1_IOVA_SIZE - 1));
+ OUTREG64(hp->ioc_regs, HP_ZX1_IBASE, hp->iova_base | 0x1);
+ OUTREG64(hp->ioc_regs, HP_ZX1_PCOM,
hp->iova_base | log2(HP_ZX1_IOVA_SIZE));
- INREG64(hp->registers, HP_ZX1_PCOM);
+ INREG64(hp->ioc_regs, HP_ZX1_PCOM);
}
return 0;
}
-static void hp_zx1_cleanup(void)
+static void
+hp_zx1_cleanup (void)
{
struct _hp_private *hp = &hp_private;
if (hp->io_pdir_owner)
- OUTREG64(hp->registers, HP_ZX1_IBASE, 0);
- iounmap((void *) hp->registers);
+ OUTREG64(hp->ioc_regs, HP_ZX1_IBASE, 0);
+ iounmap((void *) hp->ioc_regs);
}
-static void hp_zx1_tlbflush(agp_memory * mem)
+static void
+hp_zx1_tlbflush (agp_memory * mem)
{
struct _hp_private *hp = &hp_private;
- OUTREG64(hp->registers, HP_ZX1_PCOM, hp->gart_base | log2(hp->gart_size));
- INREG64(hp->registers, HP_ZX1_PCOM);
+ OUTREG64(hp->ioc_regs, HP_ZX1_PCOM, hp->gart_base | log2(hp->gart_size));
+ INREG64(hp->ioc_regs, HP_ZX1_PCOM);
}
-static int hp_zx1_create_gatt_table(void)
+static int
+hp_zx1_create_gatt_table (void)
{
struct _hp_private *hp = &hp_private;
int i;
return 0;
}
-static int hp_zx1_free_gatt_table(void)
+static int
+hp_zx1_free_gatt_table (void)
{
struct _hp_private *hp = &hp_private;
return 0;
}
-static int hp_zx1_insert_memory(agp_memory * mem, off_t pg_start, int type)
+static int
+hp_zx1_insert_memory (agp_memory * mem, off_t pg_start, int type)
{
struct _hp_private *hp = &hp_private;
int i, k;
return 0;
}
-static int hp_zx1_remove_memory(agp_memory * mem, off_t pg_start, int type)
+static int
+hp_zx1_remove_memory (agp_memory * mem, off_t pg_start, int type)
{
struct _hp_private *hp = &hp_private;
int i, io_pg_start, io_pg_count;
return 0;
}
-static unsigned long hp_zx1_mask_memory(unsigned long addr, int type)
+static unsigned long
+hp_zx1_mask_memory(unsigned long addr, int type)
{
return HP_ZX1_PDIR_VALID_BIT | addr;
}
-static int __init hp_zx1_setup (struct pci_dev *pdev __attribute__((unused)))
+static void
+hp_zx1_agp_enable (u32 mode)
+{
+ struct _hp_private *hp = &hp_private;
+ u32 command;
+
+ command = INREG32(hp->lba_regs, HP_ZX1_AGP_STATUS);
+
+ command = agp_collect_device_status(mode, command);
+ command |= 0x00000100;
+
+ OUTREG32(hp->lba_regs, HP_ZX1_AGP_COMMAND, command);
+
+ agp_device_command(command, 0);
+}
+
+static int __init
+hp_zx1_setup (u64 ioc_hpa, u64 lba_hpa)
{
agp_bridge->masks = hp_zx1_masks;
agp_bridge->dev_private_data = NULL;
agp_bridge->cleanup = hp_zx1_cleanup;
agp_bridge->tlb_flush = hp_zx1_tlbflush;
agp_bridge->mask_memory = hp_zx1_mask_memory;
- agp_bridge->agp_enable = agp_generic_enable;
+ agp_bridge->agp_enable = hp_zx1_agp_enable;
agp_bridge->cache_flush = global_cache_flush;
agp_bridge->create_gatt_table = hp_zx1_create_gatt_table;
agp_bridge->free_gatt_table = hp_zx1_free_gatt_table;
agp_bridge->agp_alloc_page = agp_generic_alloc_page;
agp_bridge->agp_destroy_page = agp_generic_destroy_page;
agp_bridge->cant_use_aperture = 1;
- return hp_zx1_ioc_init();
+
+ return hp_zx1_ioc_init(ioc_hpa, lba_hpa);
}
-static int __init agp_find_supported_device(struct pci_dev *dev)
+static acpi_status __init
+zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret)
{
- agp_bridge->dev = dev;
+ acpi_handle handle, parent;
+ acpi_status status;
+ struct acpi_device_info info;
+ u64 lba_hpa, sba_hpa, length;
+
+ status = hp_acpi_csr_space(obj, &lba_hpa, &length);
+ if (ACPI_FAILURE(status))
+ return 1;
+
+ /* Look for an enclosing IOC scope and find its CSR space */
+ handle = obj;
+ do {
+ status = acpi_get_object_info(handle, &info);
+ if (ACPI_SUCCESS(status)) {
+ /* TBD check _CID also */
+ info.hardware_id[sizeof(info.hardware_id)-1] = '\0';
+ if (!strcmp(info.hardware_id, "HWP0001")) {
+ status = hp_acpi_csr_space(handle, &sba_hpa, &length);
+ if (ACPI_SUCCESS(status))
+ break;
+ else {
+ printk(KERN_ERR PFX "Detected HP ZX1 "
+ "AGP LBA but no IOC.\n");
+ return status;
+ }
+ }
+ }
- /* ZX1 LBAs can be either PCI or AGP bridges */
- if (pci_find_capability(dev, PCI_CAP_ID_AGP)) {
- printk(KERN_INFO PFX "Detected HP ZX1 AGP chipset at %s\n",
- dev->slot_name);
- agp_bridge->type = HP_ZX1;
- agp_bridge->dev = dev;
- return hp_zx1_setup(dev);
- }
- return -ENODEV;
-}
+ status = acpi_get_parent(handle, &parent);
+ handle = parent;
+ } while (ACPI_SUCCESS(status));
-static struct agp_driver hp_agp_driver = {
- .owner = THIS_MODULE,
-};
+ if (hp_zx1_setup(sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa))
+ return 1;
-static int __init agp_hp_probe (struct pci_dev *dev, const struct pci_device_id *ent)
-{
- if (agp_find_supported_device(dev) == 0) {
- hp_agp_driver.dev = dev;
- agp_register_driver(&hp_agp_driver);
- return 0;
- }
- return -ENODEV;
-}
+ fake_bridge_dev.vendor = PCI_VENDOR_ID_HP;
+ fake_bridge_dev.device = PCI_DEVICE_ID_HP_ZX1_LBA;
-static struct pci_device_id agp_hp_pci_table[] __initdata = {
- {
- .class = (PCI_CLASS_BRIDGE_HOST << 8),
- .class_mask = ~0,
- .vendor = PCI_VENDOR_ID_HP,
- .device = PCI_DEVICE_ID_HP_ZX1_LBA,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
- },
- { }
-};
-
-MODULE_DEVICE_TABLE(pci, agp_hp_pci_table);
+ return 0;
+}
-static struct __initdata pci_driver agp_hp_pci_driver = {
- .name = "agpgart-hp",
- .id_table = agp_hp_pci_table,
- .probe = agp_hp_probe,
+static struct agp_driver hp_agp_driver = {
+ .owner = THIS_MODULE,
};
-static int __init agp_hp_init(void)
+static int __init
+agp_hp_init (void)
{
- int ret_val;
+ acpi_status status;
- ret_val = pci_module_init(&agp_hp_pci_driver);
- if (ret_val)
+ status = acpi_get_devices("HWP0003", zx1_gart_probe, "HWP0003 AGP LBA", NULL);
+ if (!(ACPI_SUCCESS(status))) {
agp_bridge->type = NOT_SUPPORTED;
+ printk(KERN_INFO PFX "Failed to initialize zx1 AGP.\n");
+ return -ENODEV;
+ }
+
+ if (fake_bridge_dev.vendor && !agp_bridge->type) {
+ hp_agp_driver.dev = &fake_bridge_dev;
+ agp_bridge->type = HP_ZX1;
+ agp_bridge->dev = &fake_bridge_dev;
+ return agp_register_driver(&hp_agp_driver);
- return ret_val;
+ } else {
+ return -ENODEV;
+ }
}
-static void __exit agp_hp_cleanup(void)
+static void __exit
+agp_hp_cleanup (void)
{
agp_unregister_driver(&hp_agp_driver);
- pci_unregister_driver(&agp_hp_pci_driver);
}
module_init(agp_hp_init);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff