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-rw-r--r--drivers/char/agp/hp-agp.c550
1 files changed, 0 insertions, 550 deletions
diff --git a/drivers/char/agp/hp-agp.c b/drivers/char/agp/hp-agp.c
deleted file mode 100644
index 84d9adbb62..0000000000
--- a/drivers/char/agp/hp-agp.c
+++ /dev/null
@@ -1,550 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * HP zx1 AGPGART routines.
- *
- * (c) Copyright 2002, 2003 Hewlett-Packard Development Company, L.P.
- * Bjorn Helgaas <bjorn.helgaas@hp.com>
- */
-
-#include <linux/acpi.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/agp_backend.h>
-#include <linux/log2.h>
-#include <linux/slab.h>
-
-#include <asm/acpi-ext.h>
-
-#include "agp.h"
-
-#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
-
-#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_SBA_IOMMU_COOKIE 0x0000badbadc0ffeeUL
-
-#define HP_ZX1_PDIR_VALID_BIT 0x8000000000000000UL
-#define HP_ZX1_IOVA_TO_PDIR(va) ((va - hp_private.iova_base) >> hp_private.io_tlb_shift)
-
-#define AGP8X_MODE_BIT 3
-#define AGP8X_MODE (1 << AGP8X_MODE_BIT)
-
-/* AGP bridge need not be PCI device, but DRM thinks it is. */
-static struct pci_dev fake_bridge_dev;
-
-static int hp_zx1_gart_found;
-
-static struct aper_size_info_fixed hp_zx1_sizes[] =
-{
- {0, 0, 0}, /* filled in by hp_zx1_fetch_size() */
-};
-
-static struct gatt_mask hp_zx1_masks[] =
-{
- {.mask = HP_ZX1_PDIR_VALID_BIT, .type = 0}
-};
-
-static struct _hp_private {
- volatile u8 __iomem *ioc_regs;
- volatile u8 __iomem *lba_regs;
- int lba_cap_offset;
- u64 *io_pdir; // PDIR for entire IOVA
- u64 *gatt; // PDIR just for GART (subset of above)
- u64 gatt_entries;
- u64 iova_base;
- u64 gart_base;
- u64 gart_size;
- u64 io_pdir_size;
- int io_pdir_owner; // do we own it, or share it with sba_iommu?
- int io_page_size;
- int io_tlb_shift;
- int io_tlb_ps; // IOC ps config
- int io_pages_per_kpage;
-} hp_private;
-
-static int __init hp_zx1_ioc_shared(void)
-{
- struct _hp_private *hp = &hp_private;
-
- printk(KERN_INFO PFX "HP ZX1 IOC: IOPDIR shared with sba_iommu\n");
-
- /*
- * IOC already configured by sba_iommu module; just use
- * its setup. We assume:
- * - IOVA space is 1Gb in size
- * - first 512Mb is IOMMU, second 512Mb is GART
- */
- hp->io_tlb_ps = readq(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;
- case 2: hp->io_tlb_shift = 14; break;
- case 3: hp->io_tlb_shift = 16; break;
- default:
- printk(KERN_ERR PFX "Invalid IOTLB page size "
- "configuration 0x%x\n", hp->io_tlb_ps);
- hp->gatt = NULL;
- hp->gatt_entries = 0;
- return -ENODEV;
- }
- hp->io_page_size = 1 << hp->io_tlb_shift;
- hp->io_pages_per_kpage = PAGE_SIZE / hp->io_page_size;
-
- hp->iova_base = readq(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(readq(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) {
- /* Normal case when no AGP device in system */
- hp->gatt = NULL;
- hp->gatt_entries = 0;
- printk(KERN_ERR PFX "No reserved IO PDIR entry found; "
- "GART disabled\n");
- return -ENODEV;
- }
-
- return 0;
-}
-
-static int __init
-hp_zx1_ioc_owner (void)
-{
- struct _hp_private *hp = &hp_private;
-
- printk(KERN_INFO PFX "HP ZX1 IOC: IOPDIR dedicated to GART\n");
-
- /*
- * Select an IOV page size no larger than system page size.
- */
- if (PAGE_SIZE >= KB(64)) {
- hp->io_tlb_shift = 16;
- hp->io_tlb_ps = 3;
- } else if (PAGE_SIZE >= KB(16)) {
- hp->io_tlb_shift = 14;
- hp->io_tlb_ps = 2;
- } else if (PAGE_SIZE >= KB(8)) {
- hp->io_tlb_shift = 13;
- hp->io_tlb_ps = 1;
- } else {
- hp->io_tlb_shift = 12;
- hp->io_tlb_ps = 0;
- }
- hp->io_page_size = 1 << hp->io_tlb_shift;
- hp->io_pages_per_kpage = PAGE_SIZE / hp->io_page_size;
-
- hp->iova_base = HP_ZX1_IOVA_BASE;
- hp->gart_size = HP_ZX1_GART_SIZE;
- hp->gart_base = hp->iova_base + HP_ZX1_IOVA_SIZE - hp->gart_size;
-
- hp->gatt_entries = hp->gart_size / hp->io_page_size;
- hp->io_pdir_size = (HP_ZX1_IOVA_SIZE / hp->io_page_size) * sizeof(u64);
-
- return 0;
-}
-
-static int __init
-hp_zx1_ioc_init (u64 hpa)
-{
- struct _hp_private *hp = &hp_private;
-
- hp->ioc_regs = ioremap(hpa, 1024);
- if (!hp->ioc_regs)
- return -ENOMEM;
-
- /*
- * If the IOTLB is currently disabled, we can take it over.
- * Otherwise, we have to share with sba_iommu.
- */
- hp->io_pdir_owner = (readq(hp->ioc_regs+HP_ZX1_IBASE) & 0x1) == 0;
-
- if (hp->io_pdir_owner)
- return hp_zx1_ioc_owner();
-
- return hp_zx1_ioc_shared();
-}
-
-static int
-hp_zx1_lba_find_capability (volatile u8 __iomem *hpa, int cap)
-{
- u16 status;
- u8 pos, id;
- int ttl = 48;
-
- status = readw(hpa+PCI_STATUS);
- if (!(status & PCI_STATUS_CAP_LIST))
- return 0;
- pos = readb(hpa+PCI_CAPABILITY_LIST);
- while (ttl-- && pos >= 0x40) {
- pos &= ~3;
- id = readb(hpa+pos+PCI_CAP_LIST_ID);
- if (id == 0xff)
- break;
- if (id == cap)
- return pos;
- pos = readb(hpa+pos+PCI_CAP_LIST_NEXT);
- }
- return 0;
-}
-
-static int __init
-hp_zx1_lba_init (u64 hpa)
-{
- struct _hp_private *hp = &hp_private;
- int cap;
-
- hp->lba_regs = ioremap(hpa, 256);
- if (!hp->lba_regs)
- return -ENOMEM;
-
- hp->lba_cap_offset = hp_zx1_lba_find_capability(hp->lba_regs, PCI_CAP_ID_AGP);
-
- cap = readl(hp->lba_regs+hp->lba_cap_offset) & 0xff;
- if (cap != PCI_CAP_ID_AGP) {
- printk(KERN_ERR PFX "Invalid capability ID 0x%02x at 0x%x\n",
- cap, hp->lba_cap_offset);
- iounmap(hp->lba_regs);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static int
-hp_zx1_fetch_size(void)
-{
- int size;
-
- size = hp_private.gart_size / MB(1);
- hp_zx1_sizes[0].size = size;
- agp_bridge->current_size = (void *) &hp_zx1_sizes[0];
- return size;
-}
-
-static int
-hp_zx1_configure (void)
-{
- struct _hp_private *hp = &hp_private;
-
- agp_bridge->gart_bus_addr = hp->gart_base;
- agp_bridge->capndx = hp->lba_cap_offset;
- agp_bridge->mode = readl(hp->lba_regs+hp->lba_cap_offset+PCI_AGP_STATUS);
-
- if (hp->io_pdir_owner) {
- writel(virt_to_phys(hp->io_pdir), hp->ioc_regs+HP_ZX1_PDIR_BASE);
- readl(hp->ioc_regs+HP_ZX1_PDIR_BASE);
- writel(hp->io_tlb_ps, hp->ioc_regs+HP_ZX1_TCNFG);
- readl(hp->ioc_regs+HP_ZX1_TCNFG);
- writel((unsigned int)(~(HP_ZX1_IOVA_SIZE-1)), hp->ioc_regs+HP_ZX1_IMASK);
- readl(hp->ioc_regs+HP_ZX1_IMASK);
- writel(hp->iova_base|1, hp->ioc_regs+HP_ZX1_IBASE);
- readl(hp->ioc_regs+HP_ZX1_IBASE);
- writel(hp->iova_base|ilog2(HP_ZX1_IOVA_SIZE), hp->ioc_regs+HP_ZX1_PCOM);
- readl(hp->ioc_regs+HP_ZX1_PCOM);
- }
-
- return 0;
-}
-
-static void
-hp_zx1_cleanup (void)
-{
- struct _hp_private *hp = &hp_private;
-
- if (hp->ioc_regs) {
- if (hp->io_pdir_owner) {
- writeq(0, hp->ioc_regs+HP_ZX1_IBASE);
- readq(hp->ioc_regs+HP_ZX1_IBASE);
- }
- iounmap(hp->ioc_regs);
- }
- if (hp->lba_regs)
- iounmap(hp->lba_regs);
-}
-
-static void
-hp_zx1_tlbflush (struct agp_memory *mem)
-{
- struct _hp_private *hp = &hp_private;
-
- writeq(hp->gart_base | ilog2(hp->gart_size), hp->ioc_regs+HP_ZX1_PCOM);
- readq(hp->ioc_regs+HP_ZX1_PCOM);
-}
-
-static int
-hp_zx1_create_gatt_table (struct agp_bridge_data *bridge)
-{
- struct _hp_private *hp = &hp_private;
- int i;
-
- if (hp->io_pdir_owner) {
- hp->io_pdir = (u64 *) __get_free_pages(GFP_KERNEL,
- get_order(hp->io_pdir_size));
- if (!hp->io_pdir) {
- printk(KERN_ERR PFX "Couldn't allocate contiguous "
- "memory for I/O PDIR\n");
- hp->gatt = NULL;
- hp->gatt_entries = 0;
- return -ENOMEM;
- }
- memset(hp->io_pdir, 0, hp->io_pdir_size);
-
- hp->gatt = &hp->io_pdir[HP_ZX1_IOVA_TO_PDIR(hp->gart_base)];
- }
-
- for (i = 0; i < hp->gatt_entries; i++) {
- hp->gatt[i] = (unsigned long) agp_bridge->scratch_page;
- }
-
- return 0;
-}
-
-static int
-hp_zx1_free_gatt_table (struct agp_bridge_data *bridge)
-{
- struct _hp_private *hp = &hp_private;
-
- if (hp->io_pdir_owner)
- free_pages((unsigned long) hp->io_pdir,
- get_order(hp->io_pdir_size));
- else
- hp->gatt[0] = HP_ZX1_SBA_IOMMU_COOKIE;
- return 0;
-}
-
-static int
-hp_zx1_insert_memory (struct agp_memory *mem, off_t pg_start, int type)
-{
- struct _hp_private *hp = &hp_private;
- int i, k;
- off_t j, io_pg_start;
- int io_pg_count;
-
- if (type != mem->type ||
- agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type)) {
- return -EINVAL;
- }
-
- io_pg_start = hp->io_pages_per_kpage * pg_start;
- io_pg_count = hp->io_pages_per_kpage * mem->page_count;
- if ((io_pg_start + io_pg_count) > hp->gatt_entries) {
- return -EINVAL;
- }
-
- j = io_pg_start;
- while (j < (io_pg_start + io_pg_count)) {
- if (hp->gatt[j]) {
- return -EBUSY;
- }
- j++;
- }
-
- if (!mem->is_flushed) {
- global_cache_flush();
- mem->is_flushed = true;
- }
-
- for (i = 0, j = io_pg_start; i < mem->page_count; i++) {
- unsigned long paddr;
-
- paddr = page_to_phys(mem->pages[i]);
- for (k = 0;
- k < hp->io_pages_per_kpage;
- k++, j++, paddr += hp->io_page_size) {
- hp->gatt[j] = HP_ZX1_PDIR_VALID_BIT | paddr;
- }
- }
-
- agp_bridge->driver->tlb_flush(mem);
- return 0;
-}
-
-static int
-hp_zx1_remove_memory (struct agp_memory *mem, off_t pg_start, int type)
-{
- struct _hp_private *hp = &hp_private;
- int i, io_pg_start, io_pg_count;
-
- if (type != mem->type ||
- agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type)) {
- return -EINVAL;
- }
-
- io_pg_start = hp->io_pages_per_kpage * pg_start;
- io_pg_count = hp->io_pages_per_kpage * mem->page_count;
- for (i = io_pg_start; i < io_pg_count + io_pg_start; i++) {
- hp->gatt[i] = agp_bridge->scratch_page;
- }
-
- agp_bridge->driver->tlb_flush(mem);
- return 0;
-}
-
-static unsigned long
-hp_zx1_mask_memory (struct agp_bridge_data *bridge, dma_addr_t addr, int type)
-{
- return HP_ZX1_PDIR_VALID_BIT | addr;
-}
-
-static void
-hp_zx1_enable (struct agp_bridge_data *bridge, u32 mode)
-{
- struct _hp_private *hp = &hp_private;
- u32 command;
-
- command = readl(hp->lba_regs+hp->lba_cap_offset+PCI_AGP_STATUS);
- command = agp_collect_device_status(bridge, mode, command);
- command |= 0x00000100;
-
- writel(command, hp->lba_regs+hp->lba_cap_offset+PCI_AGP_COMMAND);
-
- agp_device_command(command, (mode & AGP8X_MODE) != 0);
-}
-
-const struct agp_bridge_driver hp_zx1_driver = {
- .owner = THIS_MODULE,
- .size_type = FIXED_APER_SIZE,
- .configure = hp_zx1_configure,
- .fetch_size = hp_zx1_fetch_size,
- .cleanup = hp_zx1_cleanup,
- .tlb_flush = hp_zx1_tlbflush,
- .mask_memory = hp_zx1_mask_memory,
- .masks = hp_zx1_masks,
- .agp_enable = hp_zx1_enable,
- .cache_flush = global_cache_flush,
- .create_gatt_table = hp_zx1_create_gatt_table,
- .free_gatt_table = hp_zx1_free_gatt_table,
- .insert_memory = hp_zx1_insert_memory,
- .remove_memory = hp_zx1_remove_memory,
- .alloc_by_type = agp_generic_alloc_by_type,
- .free_by_type = agp_generic_free_by_type,
- .agp_alloc_page = agp_generic_alloc_page,
- .agp_alloc_pages = agp_generic_alloc_pages,
- .agp_destroy_page = agp_generic_destroy_page,
- .agp_destroy_pages = agp_generic_destroy_pages,
- .agp_type_to_mask_type = agp_generic_type_to_mask_type,
- .cant_use_aperture = true,
-};
-
-static int __init
-hp_zx1_setup (u64 ioc_hpa, u64 lba_hpa)
-{
- struct agp_bridge_data *bridge;
- int error = 0;
-
- error = hp_zx1_ioc_init(ioc_hpa);
- if (error)
- goto fail;
-
- error = hp_zx1_lba_init(lba_hpa);
- if (error)
- goto fail;
-
- bridge = agp_alloc_bridge();
- if (!bridge) {
- error = -ENOMEM;
- goto fail;
- }
- bridge->driver = &hp_zx1_driver;
-
- fake_bridge_dev.vendor = PCI_VENDOR_ID_HP;
- fake_bridge_dev.device = PCI_DEVICE_ID_HP_PCIX_LBA;
- bridge->dev = &fake_bridge_dev;
-
- error = agp_add_bridge(bridge);
- fail:
- if (error)
- hp_zx1_cleanup();
- return error;
-}
-
-static acpi_status __init
-zx1_gart_probe (acpi_handle obj, u32 depth, void *context, void **ret)
-{
- acpi_handle handle, parent;
- acpi_status status;
- struct acpi_device_info *info;
- u64 lba_hpa, sba_hpa, length;
- int match;
-
- status = hp_acpi_csr_space(obj, &lba_hpa, &length);
- if (ACPI_FAILURE(status))
- return AE_OK; /* keep looking for another bridge */
-
- /* 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) && (info->valid & ACPI_VALID_HID)) {
- /* TBD check _CID also */
- match = (strcmp(info->hardware_id.string, "HWP0001") == 0);
- kfree(info);
- if (match) {
- 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 AE_OK;
- }
- }
- }
-
- status = acpi_get_parent(handle, &parent);
- handle = parent;
- } while (ACPI_SUCCESS(status));
-
- if (ACPI_FAILURE(status))
- return AE_OK; /* found no enclosing IOC */
-
- if (hp_zx1_setup(sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa))
- return AE_OK;
-
- printk(KERN_INFO PFX "Detected HP ZX1 %s AGP chipset "
- "(ioc=%llx, lba=%llx)\n", (char *)context,
- sba_hpa + HP_ZX1_IOC_OFFSET, lba_hpa);
-
- hp_zx1_gart_found = 1;
- return AE_CTRL_TERMINATE; /* we only support one bridge; quit looking */
-}
-
-static int __init
-agp_hp_init (void)
-{
- if (agp_off)
- return -EINVAL;
-
- acpi_get_devices("HWP0003", zx1_gart_probe, "HWP0003", NULL);
- if (hp_zx1_gart_found)
- return 0;
-
- acpi_get_devices("HWP0007", zx1_gart_probe, "HWP0007", NULL);
- if (hp_zx1_gart_found)
- return 0;
-
- return -ENODEV;
-}
-
-static void __exit
-agp_hp_cleanup (void)
-{
-}
-
-module_init(agp_hp_init);
-module_exit(agp_hp_cleanup);
-
-MODULE_LICENSE("GPL and additional rights");