diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/char/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/agp/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/char/agp/Makefile | 2 | ||||
| -rw-r--r-- | drivers/char/agp/hp-agp.c | 550 | ||||
| -rw-r--r-- | drivers/char/agp/i460-agp.c | 659 | ||||
| -rw-r--r-- | drivers/char/hpet.c | 30 | ||||
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/char/mem.c | 12 | ||||
| -rw-r--r-- | drivers/char/mspec.c | 295 |
10 files changed, 4 insertions, 1567 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 625af75833fc..7c8dd0abcfdf 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -348,7 +348,7 @@ config DEVPORT device is similar to /dev/mem, but for I/O ports. config HPET - bool "HPET - High Precision Event Timer" if (X86 || IA64) + bool "HPET - High Precision Event Timer" if X86 default n depends on ACPI help @@ -377,7 +377,7 @@ config HPET_MMAP_DEFAULT config HANGCHECK_TIMER tristate "Hangcheck timer" - depends on X86 || IA64 || PPC64 || S390 + depends on X86 || PPC64 || S390 help The hangcheck-timer module detects when the system has gone out to lunch past a certain margin. It can reboot the system diff --git a/drivers/char/Makefile b/drivers/char/Makefile index c5f532e412f1..e9b360cdc99a 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -8,7 +8,6 @@ obj-$(CONFIG_TTY_PRINTK) += ttyprintk.o obj-y += misc.o obj-$(CONFIG_ATARI_DSP56K) += dsp56k.o obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o -obj-$(CONFIG_MSPEC) += mspec.o obj-$(CONFIG_UV_MMTIMER) += uv_mmtimer.o obj-$(CONFIG_IBM_BSR) += bsr.o diff --git a/drivers/char/agp/Kconfig b/drivers/char/agp/Kconfig index 4f501e4842ab..c47eb7bf06d4 100644 --- a/drivers/char/agp/Kconfig +++ b/drivers/char/agp/Kconfig @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 menuconfig AGP tristate "/dev/agpgart (AGP Support)" - depends on ALPHA || IA64 || PARISC || PPC || X86 + depends on ALPHA || PARISC || PPC || X86 depends on PCI help AGP (Accelerated Graphics Port) is a bus system mainly used to @@ -109,20 +109,6 @@ config AGP_VIA This option gives you AGP support for the GLX component of X on VIA MVP3/Apollo Pro chipsets. -config AGP_I460 - tristate "Intel 460GX chipset support" - depends on AGP && IA64 - help - This option gives you AGP GART support for the Intel 460GX chipset - for IA64 processors. - -config AGP_HP_ZX1 - tristate "HP ZX1 chipset AGP support" - depends on AGP && IA64 - help - This option gives you AGP GART support for the HP ZX1 chipset - for IA64 processors. - config AGP_PARISC tristate "HP Quicksilver AGP support" depends on AGP && PARISC && 64BIT && IOMMU_SBA diff --git a/drivers/char/agp/Makefile b/drivers/char/agp/Makefile index 90ed8c789e48..25834557e486 100644 --- a/drivers/char/agp/Makefile +++ b/drivers/char/agp/Makefile @@ -14,9 +14,7 @@ obj-$(CONFIG_AGP_AMD) += amd-k7-agp.o obj-$(CONFIG_AGP_AMD64) += amd64-agp.o obj-$(CONFIG_AGP_ALPHA_CORE) += alpha-agp.o obj-$(CONFIG_AGP_EFFICEON) += efficeon-agp.o -obj-$(CONFIG_AGP_HP_ZX1) += hp-agp.o obj-$(CONFIG_AGP_PARISC) += parisc-agp.o -obj-$(CONFIG_AGP_I460) += i460-agp.o obj-$(CONFIG_AGP_INTEL) += intel-agp.o obj-$(CONFIG_INTEL_GTT) += intel-gtt.o obj-$(CONFIG_AGP_NVIDIA) += nvidia-agp.o 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"); diff --git a/drivers/char/agp/i460-agp.c b/drivers/char/agp/i460-agp.c deleted file mode 100644 index 15b240ea4848..000000000000 --- a/drivers/char/agp/i460-agp.c +++ /dev/null @@ -1,659 +0,0 @@ -/* - * For documentation on the i460 AGP interface, see Chapter 7 (AGP Subsystem) of - * the "Intel 460GTX Chipset Software Developer's Manual": - * http://www.intel.com/design/archives/itanium/downloads/248704.htm - */ -/* - * 460GX support by Chris Ahna <christopher.j.ahna@intel.com> - * Clean up & simplification by David Mosberger-Tang <davidm@hpl.hp.com> - */ -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/agp_backend.h> -#include <linux/log2.h> - -#include "agp.h" - -#define INTEL_I460_BAPBASE 0x98 -#define INTEL_I460_GXBCTL 0xa0 -#define INTEL_I460_AGPSIZ 0xa2 -#define INTEL_I460_ATTBASE 0xfe200000 -#define INTEL_I460_GATT_VALID (1UL << 24) -#define INTEL_I460_GATT_COHERENT (1UL << 25) - -/* - * The i460 can operate with large (4MB) pages, but there is no sane way to support this - * within the current kernel/DRM environment, so we disable the relevant code for now. - * See also comments in ia64_alloc_page()... - */ -#define I460_LARGE_IO_PAGES 0 - -#if I460_LARGE_IO_PAGES -# define I460_IO_PAGE_SHIFT i460.io_page_shift -#else -# define I460_IO_PAGE_SHIFT 12 -#endif - -#define I460_IOPAGES_PER_KPAGE (PAGE_SIZE >> I460_IO_PAGE_SHIFT) -#define I460_KPAGES_PER_IOPAGE (1 << (I460_IO_PAGE_SHIFT - PAGE_SHIFT)) -#define I460_SRAM_IO_DISABLE (1 << 4) -#define I460_BAPBASE_ENABLE (1 << 3) -#define I460_AGPSIZ_MASK 0x7 -#define I460_4M_PS (1 << 1) - -/* Control bits for Out-Of-GART coherency and Burst Write Combining */ -#define I460_GXBCTL_OOG (1UL << 0) -#define I460_GXBCTL_BWC (1UL << 2) - -/* - * gatt_table entries are 32-bits wide on the i460; the generic code ought to declare the - * gatt_table and gatt_table_real pointers a "void *"... - */ -#define RD_GATT(index) readl((u32 *) i460.gatt + (index)) -#define WR_GATT(index, val) writel((val), (u32 *) i460.gatt + (index)) -/* - * The 460 spec says we have to read the last location written to make sure that all - * writes have taken effect - */ -#define WR_FLUSH_GATT(index) RD_GATT(index) - -static unsigned long i460_mask_memory (struct agp_bridge_data *bridge, - dma_addr_t addr, int type); - -static struct { - void *gatt; /* ioremap'd GATT area */ - - /* i460 supports multiple GART page sizes, so GART pageshift is dynamic: */ - u8 io_page_shift; - - /* BIOS configures chipset to one of 2 possible apbase values: */ - u8 dynamic_apbase; - - /* structure for tracking partial use of 4MB GART pages: */ - struct lp_desc { - unsigned long *alloced_map; /* bitmap of kernel-pages in use */ - int refcount; /* number of kernel pages using the large page */ - u64 paddr; /* physical address of large page */ - struct page *page; /* page pointer */ - } *lp_desc; -} i460; - -static const struct aper_size_info_8 i460_sizes[3] = -{ - /* - * The 32GB aperture is only available with a 4M GART page size. Due to the - * dynamic GART page size, we can't figure out page_order or num_entries until - * runtime. - */ - {32768, 0, 0, 4}, - {1024, 0, 0, 2}, - {256, 0, 0, 1} -}; - -static struct gatt_mask i460_masks[] = -{ - { - .mask = INTEL_I460_GATT_VALID | INTEL_I460_GATT_COHERENT, - .type = 0 - } -}; - -static int i460_fetch_size (void) -{ - int i; - u8 temp; - struct aper_size_info_8 *values; - - /* Determine the GART page size */ - pci_read_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL, &temp); - i460.io_page_shift = (temp & I460_4M_PS) ? 22 : 12; - pr_debug("i460_fetch_size: io_page_shift=%d\n", i460.io_page_shift); - - if (i460.io_page_shift != I460_IO_PAGE_SHIFT) { - printk(KERN_ERR PFX - "I/O (GART) page-size %luKB doesn't match expected " - "size %luKB\n", - 1UL << (i460.io_page_shift - 10), - 1UL << (I460_IO_PAGE_SHIFT)); - return 0; - } - - values = A_SIZE_8(agp_bridge->driver->aperture_sizes); - - pci_read_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ, &temp); - - /* Exit now if the IO drivers for the GART SRAMS are turned off */ - if (temp & I460_SRAM_IO_DISABLE) { - printk(KERN_ERR PFX "GART SRAMS disabled on 460GX chipset\n"); - printk(KERN_ERR PFX "AGPGART operation not possible\n"); - return 0; - } - - /* Make sure we don't try to create an 2 ^ 23 entry GATT */ - if ((i460.io_page_shift == 0) && ((temp & I460_AGPSIZ_MASK) == 4)) { - printk(KERN_ERR PFX "We can't have a 32GB aperture with 4KB GART pages\n"); - return 0; - } - - /* Determine the proper APBASE register */ - if (temp & I460_BAPBASE_ENABLE) - i460.dynamic_apbase = INTEL_I460_BAPBASE; - else - i460.dynamic_apbase = AGP_APBASE; - - for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { - /* - * Dynamically calculate the proper num_entries and page_order values for - * the define aperture sizes. Take care not to shift off the end of - * values[i].size. - */ - values[i].num_entries = (values[i].size << 8) >> (I460_IO_PAGE_SHIFT - 12); - values[i].page_order = ilog2((sizeof(u32)*values[i].num_entries) >> PAGE_SHIFT); - } - - for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { - /* Neglect control bits when matching up size_value */ - if ((temp & I460_AGPSIZ_MASK) == values[i].size_value) { - agp_bridge->previous_size = agp_bridge->current_size = (void *) (values + i); - agp_bridge->aperture_size_idx = i; - return values[i].size; - } - } - - return 0; -} - -/* There isn't anything to do here since 460 has no GART TLB. */ -static void i460_tlb_flush (struct agp_memory *mem) -{ - return; -} - -/* - * This utility function is needed to prevent corruption of the control bits - * which are stored along with the aperture size in 460's AGPSIZ register - */ -static void i460_write_agpsiz (u8 size_value) -{ - u8 temp; - - pci_read_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ, &temp); - pci_write_config_byte(agp_bridge->dev, INTEL_I460_AGPSIZ, - ((temp & ~I460_AGPSIZ_MASK) | size_value)); -} - -static void i460_cleanup (void) -{ - struct aper_size_info_8 *previous_size; - - previous_size = A_SIZE_8(agp_bridge->previous_size); - i460_write_agpsiz(previous_size->size_value); - - if (I460_IO_PAGE_SHIFT > PAGE_SHIFT) - kfree(i460.lp_desc); -} - -static int i460_configure (void) -{ - union { - u32 small[2]; - u64 large; - } temp; - size_t size; - u8 scratch; - struct aper_size_info_8 *current_size; - - temp.large = 0; - - current_size = A_SIZE_8(agp_bridge->current_size); - i460_write_agpsiz(current_size->size_value); - - /* - * Do the necessary rigmarole to read all eight bytes of APBASE. - * This has to be done since the AGP aperture can be above 4GB on - * 460 based systems. - */ - pci_read_config_dword(agp_bridge->dev, i460.dynamic_apbase, &(temp.small[0])); - pci_read_config_dword(agp_bridge->dev, i460.dynamic_apbase + 4, &(temp.small[1])); - - /* Clear BAR control bits */ - agp_bridge->gart_bus_addr = temp.large & ~((1UL << 3) - 1); - - pci_read_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL, &scratch); - pci_write_config_byte(agp_bridge->dev, INTEL_I460_GXBCTL, - (scratch & 0x02) | I460_GXBCTL_OOG | I460_GXBCTL_BWC); - - /* - * Initialize partial allocation trackers if a GART page is bigger than a kernel - * page. - */ - if (I460_IO_PAGE_SHIFT > PAGE_SHIFT) { - size = current_size->num_entries * sizeof(i460.lp_desc[0]); - i460.lp_desc = kzalloc(size, GFP_KERNEL); - if (!i460.lp_desc) - return -ENOMEM; - } - return 0; -} - -static int i460_create_gatt_table (struct agp_bridge_data *bridge) -{ - int page_order, num_entries, i; - void *temp; - - /* - * Load up the fixed address of the GART SRAMS which hold our GATT table. - */ - temp = agp_bridge->current_size; - page_order = A_SIZE_8(temp)->page_order; - num_entries = A_SIZE_8(temp)->num_entries; - - i460.gatt = ioremap(INTEL_I460_ATTBASE, PAGE_SIZE << page_order); - if (!i460.gatt) { - printk(KERN_ERR PFX "ioremap failed\n"); - return -ENOMEM; - } - - /* These are no good, the should be removed from the agp_bridge strucure... */ - agp_bridge->gatt_table_real = NULL; - agp_bridge->gatt_table = NULL; - agp_bridge->gatt_bus_addr = 0; - - for (i = 0; i < num_entries; ++i) - WR_GATT(i, 0); - WR_FLUSH_GATT(i - 1); - return 0; -} - -static int i460_free_gatt_table (struct agp_bridge_data *bridge) -{ - int num_entries, i; - void *temp; - - temp = agp_bridge->current_size; - - num_entries = A_SIZE_8(temp)->num_entries; - - for (i = 0; i < num_entries; ++i) - WR_GATT(i, 0); - WR_FLUSH_GATT(num_entries - 1); - - iounmap(i460.gatt); - return 0; -} - -/* - * The following functions are called when the I/O (GART) page size is smaller than - * PAGE_SIZE. - */ - -static int i460_insert_memory_small_io_page (struct agp_memory *mem, - off_t pg_start, int type) -{ - unsigned long paddr, io_pg_start, io_page_size; - int i, j, k, num_entries; - void *temp; - - pr_debug("i460_insert_memory_small_io_page(mem=%p, pg_start=%ld, type=%d, paddr0=0x%lx)\n", - mem, pg_start, type, page_to_phys(mem->pages[0])); - - if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) - return -EINVAL; - - io_pg_start = I460_IOPAGES_PER_KPAGE * pg_start; - - temp = agp_bridge->current_size; - num_entries = A_SIZE_8(temp)->num_entries; - - if ((io_pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count) > num_entries) { - printk(KERN_ERR PFX "Looks like we're out of AGP memory\n"); - return -EINVAL; - } - - j = io_pg_start; - while (j < (io_pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count)) { - if (!PGE_EMPTY(agp_bridge, RD_GATT(j))) { - pr_debug("i460_insert_memory_small_io_page: GATT[%d]=0x%x is busy\n", - j, RD_GATT(j)); - return -EBUSY; - } - j++; - } - - io_page_size = 1UL << I460_IO_PAGE_SHIFT; - for (i = 0, j = io_pg_start; i < mem->page_count; i++) { - paddr = page_to_phys(mem->pages[i]); - for (k = 0; k < I460_IOPAGES_PER_KPAGE; k++, j++, paddr += io_page_size) - WR_GATT(j, i460_mask_memory(agp_bridge, paddr, mem->type)); - } - WR_FLUSH_GATT(j - 1); - return 0; -} - -static int i460_remove_memory_small_io_page(struct agp_memory *mem, - off_t pg_start, int type) -{ - int i; - - pr_debug("i460_remove_memory_small_io_page(mem=%p, pg_start=%ld, type=%d)\n", - mem, pg_start, type); - - pg_start = I460_IOPAGES_PER_KPAGE * pg_start; - - for (i = pg_start; i < (pg_start + I460_IOPAGES_PER_KPAGE * mem->page_count); i++) - WR_GATT(i, 0); - WR_FLUSH_GATT(i - 1); - return 0; -} - -#if I460_LARGE_IO_PAGES - -/* - * These functions are called when the I/O (GART) page size exceeds PAGE_SIZE. - * - * This situation is interesting since AGP memory allocations that are smaller than a - * single GART page are possible. The i460.lp_desc array tracks partial allocation of the - * large GART pages to work around this issue. - * - * i460.lp_desc[pg_num].refcount tracks the number of kernel pages in use within GART page - * pg_num. i460.lp_desc[pg_num].paddr is the physical address of the large page and - * i460.lp_desc[pg_num].alloced_map is a bitmap of kernel pages that are in use (allocated). - */ - -static int i460_alloc_large_page (struct lp_desc *lp) -{ - unsigned long order = I460_IO_PAGE_SHIFT - PAGE_SHIFT; - size_t map_size; - - lp->page = alloc_pages(GFP_KERNEL, order); - if (!lp->page) { - printk(KERN_ERR PFX "Couldn't alloc 4M GART page...\n"); - return -ENOMEM; - } - - map_size = ((I460_KPAGES_PER_IOPAGE + BITS_PER_LONG - 1) & -BITS_PER_LONG)/8; - lp->alloced_map = kzalloc(map_size, GFP_KERNEL); - if (!lp->alloced_map) { - __free_pages(lp->page, order); - printk(KERN_ERR PFX "Out of memory, we're in trouble...\n"); - return -ENOMEM; - } - - lp->paddr = page_to_phys(lp->page); - lp->refcount = 0; - atomic_add(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp); - return 0; -} - -static void i460_free_large_page (struct lp_desc *lp) -{ - kfree(lp->alloced_map); - lp->alloced_map = NULL; - - __free_pages(lp->page, I460_IO_PAGE_SHIFT - PAGE_SHIFT); - atomic_sub(I460_KPAGES_PER_IOPAGE, &agp_bridge->current_memory_agp); -} - -static int i460_insert_memory_large_io_page (struct agp_memory *mem, - off_t pg_start, int type) -{ - int i, start_offset, end_offset, idx, pg, num_entries; - struct lp_desc *start, *end, *lp; - void *temp; - - if (type >= AGP_USER_TYPES || mem->type >= AGP_USER_TYPES) - return -EINVAL; - - temp = agp_bridge->current_size; - num_entries = A_SIZE_8(temp)->num_entries; - - /* Figure out what pg_start means in terms of our large GART pages */ - start = &i460.lp_desc[pg_start / I460_KPAGES_PER_IOPAGE]; - end = &i460.lp_desc[(pg_start + mem->page_count - 1) / I460_KPAGES_PER_IOPAGE]; - start_offset = pg_start % I460_KPAGES_PER_IOPAGE; - end_offset = (pg_start + mem->page_count - 1) % I460_KPAGES_PER_IOPAGE; - - if (end > i460.lp_desc + num_entries) { - printk(KERN_ERR PFX "Looks like we're out of AGP memory\n"); - return -EINVAL; - } - - /* Check if the requested region of the aperture is free */ - for (lp = start; lp <= end; ++lp) { - if (!lp->alloced_map) - continue; /* OK, the entire large page is available... */ - - for (idx = ((lp == start) ? start_offset : 0); - idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE); - idx++) - { - if (test_bit(idx, lp->alloced_map)) - return -EBUSY; - } - } - - for (lp = start, i = 0; lp <= end; ++lp) { - if (!lp->alloced_map) { - /* Allocate new GART pages... */ - if (i460_alloc_large_page(lp) < 0) - return -ENOMEM; - pg = lp - i460.lp_desc; - WR_GATT(pg, i460_mask_memory(agp_bridge, - lp->paddr, 0)); - WR_FLUSH_GATT(pg); - } - - for (idx = ((lp == start) ? start_offset : 0); - idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE); - idx++, i++) - { - mem->pages[i] = lp->page; - __set_bit(idx, lp->alloced_map); - ++lp->refcount; - } - } - return 0; -} - -static int i460_remove_memory_large_io_page (struct agp_memory *mem, - off_t pg_start, int type) -{ - int i, pg, start_offset, end_offset, idx, num_entries; - struct lp_desc *start, *end, *lp; - void *temp; - - temp = agp_bridge->current_size; - num_entries = A_SIZE_8(temp)->num_entries; - - /* Figure out what pg_start means in terms of our large GART pages */ - start = &i460.lp_desc[pg_start / I460_KPAGES_PER_IOPAGE]; - end = &i460.lp_desc[(pg_start + mem->page_count - 1) / I460_KPAGES_PER_IOPAGE]; - start_offset = pg_start % I460_KPAGES_PER_IOPAGE; - end_offset = (pg_start + mem->page_count - 1) % I460_KPAGES_PER_IOPAGE; - - for (i = 0, lp = start; lp <= end; ++lp) { - for (idx = ((lp == start) ? start_offset : 0); - idx < ((lp == end) ? (end_offset + 1) : I460_KPAGES_PER_IOPAGE); - idx++, i++) - { - mem->pages[i] = NULL; - __clear_bit(idx, lp->alloced_map); - --lp->refcount; - } - - /* Free GART pages if they are unused */ - if (lp->refcount == 0) { - pg = lp - i460.lp_desc; - WR_GATT(pg, 0); - WR_FLUSH_GATT(pg); - i460_free_large_page(lp); - } - } - return 0; -} - -/* Wrapper routines to call the approriate {small_io_page,large_io_page} function */ - -static int i460_insert_memory (struct agp_memory *mem, - off_t pg_start, int type) -{ - if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) - return i460_insert_memory_small_io_page(mem, pg_start, type); - else - return i460_insert_memory_large_io_page(mem, pg_start, type); -} - -static int i460_remove_memory (struct agp_memory *mem, - off_t pg_start, int type) -{ - if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) - return i460_remove_memory_small_io_page(mem, pg_start, type); - else - return i460_remove_memory_large_io_page(mem, pg_start, type); -} - -/* - * If the I/O (GART) page size is bigger than the kernel page size, we don't want to - * allocate memory until we know where it is to be bound in the aperture (a - * multi-kernel-page alloc might fit inside of an already allocated GART page). - * - * Let's just hope nobody counts on the allocated AGP memory being there before bind time - * (I don't think current drivers do)... - */ -static struct page *i460_alloc_page (struct agp_bridge_data *bridge) -{ - void *page; - - if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) { - page = agp_generic_alloc_page(agp_bridge); - } else - /* Returning NULL would cause problems */ - /* AK: really dubious code. */ - page = (void *)~0UL; - return page; -} - -static void i460_destroy_page (struct page *page, int flags) -{ - if (I460_IO_PAGE_SHIFT <= PAGE_SHIFT) { - agp_generic_destroy_page(page, flags); - } -} - -#endif /* I460_LARGE_IO_PAGES */ - -static unsigned long i460_mask_memory (struct agp_bridge_data *bridge, - dma_addr_t addr, int type) -{ - /* Make sure the returned address is a valid GATT entry */ - return bridge->driver->masks[0].mask - | (((addr & ~((1 << I460_IO_PAGE_SHIFT) - 1)) & 0xfffff000) >> 12); -} - -const struct agp_bridge_driver intel_i460_driver = { - .owner = THIS_MODULE, - .aperture_sizes = i460_sizes, - .size_type = U8_APER_SIZE, - .num_aperture_sizes = 3, - .configure = i460_configure, - .fetch_size = i460_fetch_size, - .cleanup = i460_cleanup, - .tlb_flush = i460_tlb_flush, - .mask_memory = i460_mask_memory, - .masks = i460_masks, - .agp_enable = agp_generic_enable, - .cache_flush = global_cache_flush, - .create_gatt_table = i460_create_gatt_table, - .free_gatt_table = i460_free_gatt_table, -#if I460_LARGE_IO_PAGES - .insert_memory = i460_insert_memory, - .remove_memory = i460_remove_memory, - .agp_alloc_page = i460_alloc_page, - .agp_destroy_page = i460_destroy_page, -#else - .insert_memory = i460_insert_memory_small_io_page, - .remove_memory = i460_remove_memory_small_io_page, - .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, -#endif - .alloc_by_type = agp_generic_alloc_by_type, - .free_by_type = agp_generic_free_by_type, - .agp_type_to_mask_type = agp_generic_type_to_mask_type, - .cant_use_aperture = true, -}; - -static int agp_intel_i460_probe(struct pci_dev *pdev, - const struct pci_device_id *ent) -{ - struct agp_bridge_data *bridge; - u8 cap_ptr; - - cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); - if (!cap_ptr) - return -ENODEV; - - bridge = agp_alloc_bridge(); - if (!bridge) - return -ENOMEM; - - bridge->driver = &intel_i460_driver; - bridge->dev = pdev; - bridge->capndx = cap_ptr; - - printk(KERN_INFO PFX "Detected Intel 460GX chipset\n"); - - pci_set_drvdata(pdev, bridge); - return agp_add_bridge(bridge); -} - -static void agp_intel_i460_remove(struct pci_dev *pdev) -{ - struct agp_bridge_data *bridge = pci_get_drvdata(pdev); - - agp_remove_bridge(bridge); - agp_put_bridge(bridge); -} - -static struct pci_device_id agp_intel_i460_pci_table[] = { - { - .class = (PCI_CLASS_BRIDGE_HOST << 8), - .class_mask = ~0, - .vendor = PCI_VENDOR_ID_INTEL, - .device = PCI_DEVICE_ID_INTEL_84460GX, - .subvendor = PCI_ANY_ID, - .subdevice = PCI_ANY_ID, - }, - { } -}; - -MODULE_DEVICE_TABLE(pci, agp_intel_i460_pci_table); - -static struct pci_driver agp_intel_i460_pci_driver = { - .name = "agpgart-intel-i460", - .id_table = agp_intel_i460_pci_table, - .probe = agp_intel_i460_probe, - .remove = agp_intel_i460_remove, -}; - -static int __init agp_intel_i460_init(void) -{ - if (agp_off) - return -EINVAL; - return pci_register_driver(&agp_intel_i460_pci_driver); -} - -static void __exit agp_intel_i460_cleanup(void) -{ - pci_unregister_driver(&agp_intel_i460_pci_driver); -} - -module_init(agp_intel_i460_init); -module_exit(agp_intel_i460_cleanup); - -MODULE_AUTHOR("Chris Ahna <Christopher.J.Ahna@intel.com>"); -MODULE_LICENSE("GPL and additional rights"); diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c index ee71376f174b..3b2159416e62 100644 --- a/drivers/char/hpet.c +++ b/drivers/char/hpet.c @@ -64,25 +64,6 @@ static DEFINE_MUTEX(hpet_mutex); /* replaces BKL */ static u32 hpet_nhpet, hpet_max_freq = HPET_USER_FREQ; -/* This clocksource driver currently only works on ia64 */ -#ifdef CONFIG_IA64 -static void __iomem *hpet_mctr; - -static u64 read_hpet(struct clocksource *cs) -{ - return (u64)read_counter((void __iomem *)hpet_mctr); -} - -static struct clocksource clocksource_hpet = { - .name = "hpet", - .rating = 250, - .read = read_hpet, - .mask = CLOCKSOURCE_MASK(64), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; -static struct clocksource *hpet_clocksource; -#endif - /* A lock for concurrent access by app and isr hpet activity. */ static DEFINE_SPINLOCK(hpet_lock); @@ -907,17 +888,6 @@ int hpet_alloc(struct hpet_data *hdp) hpetp->hp_delta = hpet_calibrate(hpetp); -/* This clocksource driver currently only works on ia64 */ -#ifdef CONFIG_IA64 - if (!hpet_clocksource) { - hpet_mctr = (void __iomem *)&hpetp->hp_hpet->hpet_mc; - clocksource_hpet.archdata.fsys_mmio = hpet_mctr; - clocksource_register_hz(&clocksource_hpet, hpetp->hp_tick_freq); - hpetp->hp_clocksource = &clocksource_hpet; - hpet_clocksource = &clocksource_hpet; - } -#endif - return 0; } diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 8de74dcfa18c..442c40efb200 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -37,7 +37,7 @@ config HW_RANDOM_TIMERIOMEM config HW_RANDOM_INTEL tristate "Intel HW Random Number Generator support" - depends on (X86 || IA64 || COMPILE_TEST) && PCI + depends on (X86 || COMPILE_TEST) && PCI default HW_RANDOM help This driver provides kernel-side support for the Random Number diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 1052b0f2d4cf..8d27aa6b5b50 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -31,10 +31,6 @@ #include <linux/uaccess.h> #include <linux/security.h> -#ifdef CONFIG_IA64 -# include <linux/efi.h> -#endif - #define DEVMEM_MINOR 1 #define DEVPORT_MINOR 4 @@ -277,13 +273,6 @@ int __weak phys_mem_access_prot_allowed(struct file *file, #ifdef pgprot_noncached static int uncached_access(struct file *file, phys_addr_t addr) { -#if defined(CONFIG_IA64) - /* - * On ia64, we ignore O_DSYNC because we cannot tolerate memory - * attribute aliases. - */ - return !(efi_mem_attributes(addr) & EFI_MEMORY_WB); -#else /* * Accessing memory above the top the kernel knows about or through a * file pointer @@ -292,7 +281,6 @@ static int uncached_access(struct file *file, phys_addr_t addr) if (file->f_flags & O_DSYNC) return 1; return addr >= __pa(high_memory); -#endif } #endif diff --git a/drivers/char/mspec.c b/drivers/char/mspec.c deleted file mode 100644 index b35f651837c8..000000000000 --- a/drivers/char/mspec.c +++ /dev/null @@ -1,295 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright (C) 2001-2006 Silicon Graphics, Inc. All rights - * reserved. - */ - -/* - * SN Platform Special Memory (mspec) Support - * - * This driver exports the SN special memory (mspec) facility to user - * processes. - * There are two types of memory made available thru this driver: - * uncached and cached. - * - * Uncached are used for memory write combining feature of the ia64 - * cpu. - * - * Cached are used for areas of memory that are used as cached addresses - * on our partition and used as uncached addresses from other partitions. - * Due to a design constraint of the SN2 Shub, you can not have processors - * on the same FSB perform both a cached and uncached reference to the - * same cache line. These special memory cached regions prevent the - * kernel from ever dropping in a TLB entry and therefore prevent the - * processor from ever speculating a cache line from this page. - */ - -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/errno.h> -#include <linux/miscdevice.h> -#include <linux/spinlock.h> -#include <linux/mm.h> -#include <linux/fs.h> -#include <linux/vmalloc.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/numa.h> -#include <linux/refcount.h> -#include <asm/page.h> -#include <linux/atomic.h> -#include <asm/tlbflush.h> -#include <asm/uncached.h> - - -#define CACHED_ID "Cached," -#define UNCACHED_ID "Uncached" -#define REVISION "4.0" -#define MSPEC_BASENAME "mspec" - -/* - * Page types allocated by the device. - */ -enum mspec_page_type { - MSPEC_CACHED = 2, - MSPEC_UNCACHED -}; - -/* - * One of these structures is allocated when an mspec region is mmaped. The - * structure is pointed to by the vma->vm_private_data field in the vma struct. - * This structure is used to record the addresses of the mspec pages. - * This structure is shared by all vma's that are split off from the - * original vma when split_vma()'s are done. - * - * The refcnt is incremented atomically because mm->mmap_lock does not - * protect in fork case where multiple tasks share the vma_data. - */ -struct vma_data { - refcount_t refcnt; /* Number of vmas sharing the data. */ - spinlock_t lock; /* Serialize access to this structure. */ - int count; /* Number of pages allocated. */ - enum mspec_page_type type; /* Type of pages allocated. */ - unsigned long vm_start; /* Original (unsplit) base. */ - unsigned long vm_end; /* Original (unsplit) end. */ - unsigned long maddr[]; /* Array of MSPEC addresses. */ -}; - -/* - * mspec_open - * - * Called when a device mapping is created by a means other than mmap - * (via fork, munmap, etc.). Increments the reference count on the - * underlying mspec data so it is not freed prematurely. - */ -static void -mspec_open(struct vm_area_struct *vma) -{ - struct vma_data *vdata; - - vdata = vma->vm_private_data; - refcount_inc(&vdata->refcnt); -} - -/* - * mspec_close - * - * Called when unmapping a device mapping. Frees all mspec pages - * belonging to all the vma's sharing this vma_data structure. - */ -static void -mspec_close(struct vm_area_struct *vma) -{ - struct vma_data *vdata; - int index, last_index; - unsigned long my_page; - - vdata = vma->vm_private_data; - - if (!refcount_dec_and_test(&vdata->refcnt)) - return; - - last_index = (vdata->vm_end - vdata->vm_start) >> PAGE_SHIFT; - for (index = 0; index < last_index; index++) { - if (vdata->maddr[index] == 0) - continue; - /* - * Clear the page before sticking it back - * into the pool. - */ - my_page = vdata->maddr[index]; - vdata->maddr[index] = 0; - memset((char *)my_page, 0, PAGE_SIZE); - uncached_free_page(my_page, 1); - } - - kvfree(vdata); -} - -/* - * mspec_fault - * - * Creates a mspec page and maps it to user space. - */ -static vm_fault_t -mspec_fault(struct vm_fault *vmf) -{ - unsigned long paddr, maddr; - unsigned long pfn; - pgoff_t index = vmf->pgoff; - struct vma_data *vdata = vmf->vma->vm_private_data; - - maddr = (volatile unsigned long) vdata->maddr[index]; - if (maddr == 0) { - maddr = uncached_alloc_page(numa_node_id(), 1); - if (maddr == 0) - return VM_FAULT_OOM; - - spin_lock(&vdata->lock); - if (vdata->maddr[index] == 0) { - vdata->count++; - vdata->maddr[index] = maddr; - } else { - uncached_free_page(maddr, 1); - maddr = vdata->maddr[index]; - } - spin_unlock(&vdata->lock); - } - - paddr = maddr & ~__IA64_UNCACHED_OFFSET; - pfn = paddr >> PAGE_SHIFT; - - return vmf_insert_pfn(vmf->vma, vmf->address, pfn); -} - -static const struct vm_operations_struct mspec_vm_ops = { - .open = mspec_open, - .close = mspec_close, - .fault = mspec_fault, -}; - -/* - * mspec_mmap - * - * Called when mmapping the device. Initializes the vma with a fault handler - * and private data structure necessary to allocate, track, and free the - * underlying pages. - */ -static int -mspec_mmap(struct file *file, struct vm_area_struct *vma, - enum mspec_page_type type) -{ - struct vma_data *vdata; - int pages, vdata_size; - - if (vma->vm_pgoff != 0) - return -EINVAL; - - if ((vma->vm_flags & VM_SHARED) == 0) - return -EINVAL; - - if ((vma->vm_flags & VM_WRITE) == 0) - return -EPERM; - - pages = vma_pages(vma); - vdata_size = sizeof(struct vma_data) + pages * sizeof(long); - vdata = kvzalloc(vdata_size, GFP_KERNEL); - if (!vdata) - return -ENOMEM; - - vdata->vm_start = vma->vm_start; - vdata->vm_end = vma->vm_end; - vdata->type = type; - spin_lock_init(&vdata->lock); - refcount_set(&vdata->refcnt, 1); - vma->vm_private_data = vdata; - - vm_flags_set(vma, VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP); - if (vdata->type == MSPEC_UNCACHED) - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - vma->vm_ops = &mspec_vm_ops; - - return 0; -} - -static int -cached_mmap(struct file *file, struct vm_area_struct *vma) -{ - return mspec_mmap(file, vma, MSPEC_CACHED); -} - -static int -uncached_mmap(struct file *file, struct vm_area_struct *vma) -{ - return mspec_mmap(file, vma, MSPEC_UNCACHED); -} - -static const struct file_operations cached_fops = { - .owner = THIS_MODULE, - .mmap = cached_mmap, - .llseek = noop_llseek, -}; - -static struct miscdevice cached_miscdev = { - .minor = MISC_DYNAMIC_MINOR, - .name = "mspec_cached", - .fops = &cached_fops -}; - -static const struct file_operations uncached_fops = { - .owner = THIS_MODULE, - .mmap = uncached_mmap, - .llseek = noop_llseek, -}; - -static struct miscdevice uncached_miscdev = { - .minor = MISC_DYNAMIC_MINOR, - .name = "mspec_uncached", - .fops = &uncached_fops -}; - -/* - * mspec_init - * - * Called at boot time to initialize the mspec facility. - */ -static int __init -mspec_init(void) -{ - int ret; - - ret = misc_register(&cached_miscdev); - if (ret) { - printk(KERN_ERR "%s: failed to register device %i\n", - CACHED_ID, ret); - return ret; - } - ret = misc_register(&uncached_miscdev); - if (ret) { - printk(KERN_ERR "%s: failed to register device %i\n", - UNCACHED_ID, ret); - misc_deregister(&cached_miscdev); - return ret; - } - - printk(KERN_INFO "%s %s initialized devices: %s %s\n", - MSPEC_BASENAME, REVISION, CACHED_ID, UNCACHED_ID); - - return 0; -} - -static void __exit -mspec_exit(void) -{ - misc_deregister(&uncached_miscdev); - misc_deregister(&cached_miscdev); -} - -module_init(mspec_init); -module_exit(mspec_exit); - -MODULE_AUTHOR("Silicon Graphics, Inc. <linux-altix@sgi.com>"); -MODULE_DESCRIPTION("Driver for SGI SN special memory operations"); -MODULE_LICENSE("GPL"); |