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Subject[PATCH] agpgart cleanup
Date
I'd like to see the attached patch in 2.4.x.  It cleans up the
agpgart/DRM interface a bit and makes it easier to support
the 460GX GART. We've been running similar code in the ia64
patch for several months, and I've also tested it on ia32 with
a Serverworks HE and Radeon.

I don't know who's maintaining agpgart these days, but this
was discussed on dri-devel on March 4/5, and Jeff Hartmann
thought it looked reasonable (sorry no URL, I can't find it in
the crappy SourceForge archives).

This patch is against 2.4.20-pre7.

Bjorn


# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
# ChangeSet 1.660 -> 1.661
# drivers/char/agp/agpgart_be.c 1.34 -> 1.36
# drivers/char/agp/agp.h 1.17 -> 1.18
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/13 bjorn_helgaas@hp.com 1.661
# Make agp_memory.memory[] (exported from agpgart to DRM) contain physical
# addresses, not GATT entries.
#
# DRM assumes agp_memory contains GATT entries, and it converts them to
# physical addresses with "paddr = agp_memory.memory[i] & mask". 460GX
# requires both a shift and a mask, so exporting plain physical addresses
# and a mask of ~0UL allows agpgart to add 460GX support without requiring
# DRM interface changes.
# --------------------------------------------
#
diff -Nru a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
--- a/drivers/char/agp/agp.h Fri Sep 13 11:37:02 2002
+++ b/drivers/char/agp/agp.h Fri Sep 13 11:37:02 2002
@@ -87,6 +87,7 @@
unsigned long *gatt_table;
unsigned long *gatt_table_real;
unsigned long scratch_page;
+ unsigned long scratch_page_real;
unsigned long gart_bus_addr;
unsigned long gatt_bus_addr;
u32 mode;
@@ -99,7 +100,6 @@
int needs_scratch_page;
int aperture_size_idx;
int num_aperture_sizes;
- int num_of_masks;
int capndx;
int cant_use_aperture;

diff -Nru a/drivers/char/agp/agpgart_be.c b/drivers/char/agp/agpgart_be.c
--- a/drivers/char/agp/agpgart_be.c Fri Sep 13 11:37:02 2002
+++ b/drivers/char/agp/agpgart_be.c Fri Sep 13 11:37:02 2002
@@ -207,7 +207,6 @@
}
if (curr->page_count != 0) {
for (i = 0; i < curr->page_count; i++) {
- curr->memory[i] &= ~(0x00000fff);
agp_bridge.agp_destroy_page((unsigned long)
phys_to_virt(curr->memory[i]));
}
@@ -260,10 +259,7 @@
agp_free_memory(new);
return NULL;
}
- new->memory[i] =
- agp_bridge.mask_memory(
- virt_to_phys((void *) new->memory[i]),
- type);
+ new->memory[i] = virt_to_phys((void *) new->memory[i]);
new->page_count++;
}

@@ -307,9 +303,6 @@

void agp_copy_info(agp_kern_info * info)
{
- unsigned long page_mask = 0;
- int i;
-
memset(info, 0, sizeof(agp_kern_info));
if (agp_bridge.type == NOT_SUPPORTED) {
info->chipset = agp_bridge.type;
@@ -325,11 +318,7 @@
info->max_memory = agp_bridge.max_memory_agp;
info->current_memory = atomic_read(&agp_bridge.current_memory_agp);
info->cant_use_aperture = agp_bridge.cant_use_aperture;
-
- for(i = 0; i < agp_bridge.num_of_masks; i++)
- page_mask |= agp_bridge.mask_memory(page_mask, i);
-
- info->page_mask = ~page_mask;
+ info->page_mask = ~0UL;
}

/* End - Routine to copy over information structure */
@@ -722,7 +711,8 @@
mem->is_flushed = TRUE;
}
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
- agp_bridge.gatt_table[j] = mem->memory[i];
+ agp_bridge.gatt_table[j] =
+ agp_bridge.mask_memory(mem->memory[i], mem->type);
}

agp_bridge.tlb_flush(mem);
@@ -967,7 +957,8 @@
CACHE_FLUSH();
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
OUTREG32(intel_i810_private.registers,
- I810_PTE_BASE + (j * 4), mem->memory[i]);
+ I810_PTE_BASE + (j * 4),
+ agp_bridge.mask_memory(mem->memory[i], mem->type));
}
CACHE_FLUSH();

@@ -1033,10 +1024,7 @@
agp_free_memory(new);
return NULL;
}
- new->memory[0] =
- agp_bridge.mask_memory(
- virt_to_phys((void *) new->memory[0]),
- type);
+ new->memory[0] = virt_to_phys((void *) new->memory[0]);
new->page_count = 1;
new->num_scratch_pages = 1;
new->type = AGP_PHYS_MEMORY;
@@ -1070,7 +1058,6 @@
intel_i810_private.i810_dev = i810_dev;

agp_bridge.masks = intel_i810_masks;
- agp_bridge.num_of_masks = 2;
agp_bridge.aperture_sizes = (void *) intel_i810_sizes;
agp_bridge.size_type = FIXED_APER_SIZE;
agp_bridge.num_aperture_sizes = 2;
@@ -1273,7 +1260,8 @@
CACHE_FLUSH();

for (i = 0, j = pg_start; i < mem->page_count; i++, j++)
- OUTREG32(intel_i830_private.registers,I810_PTE_BASE + (j * 4),mem->memory[i]);
+ OUTREG32(intel_i830_private.registers,I810_PTE_BASE + (j * 4),
+ agp_bridge.mask_memory(mem->memory[i], mem->type));

CACHE_FLUSH();

@@ -1334,7 +1322,7 @@
return(NULL);
}

- nw->memory[0] = agp_bridge.mask_memory(virt_to_phys((void *) nw->memory[0]),type);
+ nw->memory[0] = virt_to_phys((void *) nw->memory[0]);
nw->page_count = 1;
nw->num_scratch_pages = 1;
nw->type = AGP_PHYS_MEMORY;
@@ -1350,7 +1338,6 @@
intel_i830_private.i830_dev = i830_dev;

agp_bridge.masks = intel_i810_masks;
- agp_bridge.num_of_masks = 3;
agp_bridge.aperture_sizes = (void *) intel_i830_sizes;
agp_bridge.size_type = FIXED_APER_SIZE;
agp_bridge.num_aperture_sizes = 2;
@@ -1832,7 +1819,6 @@
static int __init intel_generic_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_generic_sizes;
agp_bridge.size_type = U16_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -1865,7 +1851,6 @@
static int __init intel_815_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_815_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 2;
@@ -1898,7 +1883,6 @@
static int __init intel_820_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_8xx_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -1931,7 +1915,6 @@
static int __init intel_830mp_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_830mp_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 4;
@@ -1963,7 +1946,6 @@
static int __init intel_840_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_8xx_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -1996,7 +1978,6 @@
static int __init intel_845_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_8xx_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2029,7 +2010,6 @@
static int __init intel_850_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_8xx_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2062,7 +2042,6 @@
static int __init intel_860_setup (struct pci_dev *pdev)
{
agp_bridge.masks = intel_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) intel_8xx_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2182,7 +2161,6 @@
static int __init via_generic_setup (struct pci_dev *pdev)
{
agp_bridge.masks = via_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) via_generic_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2296,7 +2274,6 @@
static int __init sis_generic_setup (struct pci_dev *pdev)
{
agp_bridge.masks = sis_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) sis_generic_sizes;
agp_bridge.size_type = U8_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2634,7 +2611,8 @@
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
addr = (j * PAGE_SIZE) + agp_bridge.gart_bus_addr;
cur_gatt = GET_GATT(addr);
- cur_gatt[GET_GATT_OFF(addr)] = mem->memory[i];
+ cur_gatt[GET_GATT_OFF(addr)] =
+ agp_bridge.mask_memory(mem->memory[i], mem->type);
}
agp_bridge.tlb_flush(mem);
return 0;
@@ -2680,7 +2658,6 @@
static int __init amd_irongate_setup (struct pci_dev *pdev)
{
agp_bridge.masks = amd_irongate_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) amd_irongate_sizes;
agp_bridge.size_type = LVL2_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -2918,7 +2895,6 @@
static int __init ali_generic_setup (struct pci_dev *pdev)
{
agp_bridge.masks = ali_generic_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) ali_generic_sizes;
agp_bridge.size_type = U32_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -3332,7 +3308,8 @@
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
addr = (j * PAGE_SIZE) + agp_bridge.gart_bus_addr;
cur_gatt = SVRWRKS_GET_GATT(addr);
- cur_gatt[GET_GATT_OFF(addr)] = mem->memory[i];
+ cur_gatt[GET_GATT_OFF(addr)] =
+ agp_bridge.mask_memory(mem->memory[i], mem->type);
}
agp_bridge.tlb_flush(mem);
return 0;
@@ -3489,7 +3466,6 @@
serverworks_private.svrwrks_dev = pdev;

agp_bridge.masks = serverworks_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.aperture_sizes = (void *) serverworks_sizes;
agp_bridge.size_type = LVL2_APER_SIZE;
agp_bridge.num_aperture_sizes = 7;
@@ -3887,7 +3863,6 @@
static int __init hp_zx1_setup (struct pci_dev *pdev)
{
agp_bridge.masks = hp_zx1_masks;
- agp_bridge.num_of_masks = 1;
agp_bridge.dev_private_data = NULL;
agp_bridge.size_type = FIXED_APER_SIZE;
agp_bridge.needs_scratch_page = FALSE;
@@ -4587,17 +4562,17 @@
}

if (agp_bridge.needs_scratch_page == TRUE) {
- agp_bridge.scratch_page = agp_bridge.agp_alloc_page();
+ unsigned long addr;
+ addr = agp_bridge.agp_alloc_page();

- if (agp_bridge.scratch_page == 0) {
+ if (addr == 0) {
printk(KERN_ERR PFX "unable to get memory for "
"scratch page.\n");
return -ENOMEM;
}
+ agp_bridge.scratch_page_real = virt_to_phys((void *) addr);
agp_bridge.scratch_page =
- virt_to_phys((void *) agp_bridge.scratch_page);
- agp_bridge.scratch_page =
- agp_bridge.mask_memory(agp_bridge.scratch_page, 0);
+ agp_bridge.mask_memory(agp_bridge.scratch_page_real, 0);
}

size_value = agp_bridge.fetch_size();
@@ -4639,9 +4614,8 @@

err_out:
if (agp_bridge.needs_scratch_page == TRUE) {
- agp_bridge.scratch_page &= ~(0x00000fff);
agp_bridge.agp_destroy_page((unsigned long)
- phys_to_virt(agp_bridge.scratch_page));
+ phys_to_virt(agp_bridge.scratch_page_real));
}
if (got_gatt)
agp_bridge.free_gatt_table();
@@ -4659,9 +4633,8 @@
vfree(agp_bridge.key_list);

if (agp_bridge.needs_scratch_page == TRUE) {
- agp_bridge.scratch_page &= ~(0x00000fff);
agp_bridge.agp_destroy_page((unsigned long)
- phys_to_virt(agp_bridge.scratch_page));
+ phys_to_virt(agp_bridge.scratch_page_real));
}
}

-
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