diff options
Diffstat (limited to 'drivers/char/agp/hp-agp.c')
| -rw-r--r-- | drivers/char/agp/hp-agp.c | 550 |
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 84d9adbb62f6..000000000000 --- 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"); |