* [PATCH] AGPGART 5/5: Intel 460GX support
@ 2002-09-28 4:34 Bjorn Helgaas
0 siblings, 0 replies; only message in thread
From: Bjorn Helgaas @ 2002-09-28 4:34 UTC (permalink / raw)
To: marcelo; +Cc: linux-kernel
This adds Intel 460GX GART support.
# 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 1.692 -> 1.693
# drivers/char/drm/drm_agpsupport.h 1.10 -> 1.11
# drivers/char/agp/agpgart_be.c 1.39 -> 1.40
# drivers/char/drm/r128_cce.c 1.6 -> 1.7
# drivers/char/drm/radeon_cp.c 1.7 -> 1.8
# drivers/char/Config.in 1.36 -> 1.37
# drivers/char/drm-4.0/radeon_cp.c 1.2 -> 1.3
# include/linux/agp_backend.h 1.14 -> 1.15
# drivers/char/agp/agp.h 1.19 -> 1.20
# drivers/char/drm-4.0/r128_cce.c 1.2 -> 1.3
# drivers/char/drm-4.0/agpsupport.c 1.3 -> 1.4
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/27 bjorn_helgaas@hp.com 1.693
# Intel 460GX GART support. Originally due to Chris Ahna
# (christopher.j.ahna@intel.com).
# --------------------------------------------
#
diff -Nru a/drivers/char/Config.in b/drivers/char/Config.in
--- a/drivers/char/Config.in Fri Sep 27 13:24:23 2002
+++ b/drivers/char/Config.in Fri Sep 27 13:24:23 2002
@@ -284,6 +284,7 @@
bool ' ALI chipset support' CONFIG_AGP_ALI
bool ' Serverworks LE/HE support' CONFIG_AGP_SWORKS
if [ "$CONFIG_IA64" = "y" ]; then
+ bool ' Intel 460GX support' CONFIG_AGP_I460
bool ' HP ZX1 AGP support' CONFIG_AGP_HP_ZX1
fi
fi
diff -Nru a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
--- a/drivers/char/agp/agp.h Fri Sep 27 13:24:23 2002
+++ b/drivers/char/agp/agp.h Fri Sep 27 13:24:23 2002
@@ -229,6 +229,9 @@
#ifndef PCI_DEVICE_ID_INTEL_82443GX_1
#define PCI_DEVICE_ID_INTEL_82443GX_1 0x71a1
#endif
+#ifndef PCI_DEVICE_ID_INTEL_460GX
+#define PCI_DEVICE_ID_INTEL_460GX 0x84ea
+#endif
#ifndef PCI_DEVICE_ID_AMD_IRONGATE_0
#define PCI_DEVICE_ID_AMD_IRONGATE_0 0x7006
#endif
@@ -279,6 +282,15 @@
#define INTEL_AGPCTRL 0xb0
#define INTEL_NBXCFG 0x50
#define INTEL_ERRSTS 0x91
+
+/* Intel 460GX Registers */
+#define INTEL_I460_APBASE 0x10
+#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)
/* intel i830 registers */
#define I830_GMCH_CTRL 0x52
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 27 13:24:23 2002
+++ b/drivers/char/agp/agpgart_be.c Fri Sep 27 13:24:23 2002
@@ -1445,9 +1445,605 @@
#endif /* CONFIG_AGP_I810 */
- #ifdef CONFIG_AGP_INTEL
+#ifdef CONFIG_AGP_I460
-#endif /* CONFIG_AGP_I810 */
+/* BIOS configures the chipset so that one of two apbase registers are used */
+static u8 intel_i460_dynamic_apbase = 0x10;
+
+/* 460 supports multiple GART page sizes, so GART pageshift is dynamic */
+static u8 intel_i460_pageshift = 12;
+static u32 intel_i460_pagesize;
+
+/* Keep track of which is larger, chipset or kernel page size. */
+static u32 intel_i460_cpk = 1;
+
+/* Structure for tracking partial use of 4MB GART pages */
+static u32 **i460_pg_detail = NULL;
+static u32 *i460_pg_count = NULL;
+
+#define I460_CPAGES_PER_KPAGE (PAGE_SIZE >> intel_i460_pageshift)
+#define I460_KPAGES_PER_CPAGE ((1 << intel_i460_pageshift) >> 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)
+
+#define log2(x) ffz(~(x))
+
+static gatt_mask intel_i460_masks[] =
+{
+ { INTEL_I460_GATT_VALID | INTEL_I460_GATT_COHERENT, 0 }
+};
+
+static unsigned long intel_i460_mask_memory(unsigned long addr, int type)
+{
+ /* Make sure the returned address is a valid GATT entry */
+ return (agp_bridge.masks[0].mask | (((addr &
+ ~((1 << intel_i460_pageshift) - 1)) & 0xffffff000) >> 12));
+}
+
+static unsigned long intel_i460_unmask_memory(unsigned long addr)
+{
+ /* Turn a GATT entry into a physical address */
+ return ((addr & 0xffffff) << 12);
+}
+
+static int intel_i460_fetch_size(void)
+{
+ int i;
+ u8 temp;
+ aper_size_info_8 *values;
+
+ /* Determine the GART page size */
+ pci_read_config_byte(agp_bridge.dev, INTEL_I460_GXBCTL, &temp);
+ intel_i460_pageshift = (temp & I460_4M_PS) ? 22 : 12;
+ intel_i460_pagesize = 1UL << intel_i460_pageshift;
+
+ values = A_SIZE_8(agp_bridge.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_WARNING PFX "GART SRAMS disabled on 460GX chipset\n");
+ printk(KERN_WARNING PFX "AGPGART operation not possible\n");
+ return 0;
+ }
+
+ /* Make sure we don't try to create an 2 ^ 23 entry GATT */
+ if ((intel_i460_pageshift == 0) && ((temp & I460_AGPSIZ_MASK) == 4)) {
+ printk(KERN_WARNING 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)
+ intel_i460_dynamic_apbase = INTEL_I460_BAPBASE;
+ else
+ intel_i460_dynamic_apbase = INTEL_I460_APBASE;
+
+ for (i = 0; i < agp_bridge.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) >>
+ (intel_i460_pageshift - 12);
+ values[i].page_order = log2((sizeof(u32)*values[i].num_entries)
+ >> PAGE_SHIFT);
+ }
+
+ for (i = 0; i < agp_bridge.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 intel_i460_tlb_flush(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 intel_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 intel_i460_cleanup(void)
+{
+ aper_size_info_8 *previous_size;
+
+ previous_size = A_SIZE_8(agp_bridge.previous_size);
+ intel_i460_write_agpsiz(previous_size->size_value);
+
+ if (intel_i460_cpk == 0) {
+ vfree(i460_pg_detail);
+ vfree(i460_pg_count);
+ }
+}
+
+
+/* Control bits for Out-Of-GART coherency and Burst Write Combining */
+#define I460_GXBCTL_OOG (1UL << 0)
+#define I460_GXBCTL_BWC (1UL << 2)
+
+static int intel_i460_configure(void)
+{
+ union {
+ u32 small[2];
+ u64 large;
+ } temp;
+ u8 scratch;
+ int i;
+
+ aper_size_info_8 *current_size;
+
+ temp.large = 0;
+
+ current_size = A_SIZE_8(agp_bridge.current_size);
+ intel_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, intel_i460_dynamic_apbase,
+ &(temp.small[0]));
+ pci_read_config_dword(agp_bridge.dev, intel_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_CPAGES_PER_KPAGE >= 1) {
+ intel_i460_cpk = 1;
+ } else {
+ intel_i460_cpk = 0;
+
+ i460_pg_detail = (void *) vmalloc(sizeof(*i460_pg_detail) *
+ current_size->num_entries);
+ i460_pg_count = (void *) vmalloc(sizeof(*i460_pg_count) *
+ current_size->num_entries);
+
+ for (i = 0; i < current_size->num_entries; i++) {
+ i460_pg_count[i] = 0;
+ i460_pg_detail[i] = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static int intel_i460_create_gatt_table(void) {
+
+ char *table;
+ int i;
+ int page_order;
+ int num_entries;
+ void *temp;
+ unsigned int read_back;
+
+ /*
+ * Load up the fixed address of the GART SRAMS which hold our
+ * GATT table.
+ */
+ table = (char *) __va(INTEL_I460_ATTBASE);
+
+ temp = agp_bridge.current_size;
+ page_order = A_SIZE_8(temp)->page_order;
+ num_entries = A_SIZE_8(temp)->num_entries;
+
+ agp_bridge.gatt_table_real = (u32 *) table;
+ agp_bridge.gatt_table = ioremap_nocache(virt_to_phys(table),
+ (PAGE_SIZE * (1 << page_order)));
+ agp_bridge.gatt_bus_addr = virt_to_phys(agp_bridge.gatt_table_real);
+
+ for (i = 0; i < num_entries; i++) {
+ agp_bridge.gatt_table[i] = 0;
+ }
+
+ /*
+ * The 460 spec says we have to read the last location written to
+ * make sure that all writes have taken effect
+ */
+ read_back = agp_bridge.gatt_table[i - 1];
+
+ return 0;
+}
+
+static int intel_i460_free_gatt_table(void)
+{
+ int num_entries;
+ int i;
+ void *temp;
+ unsigned int read_back;
+
+ temp = agp_bridge.current_size;
+
+ num_entries = A_SIZE_8(temp)->num_entries;
+
+ for (i = 0; i < num_entries; i++) {
+ agp_bridge.gatt_table[i] = 0;
+ }
+
+ /*
+ * The 460 spec says we have to read the last location written to
+ * make sure that all writes have taken effect
+ */
+ read_back = agp_bridge.gatt_table[i - 1];
+
+ iounmap(agp_bridge.gatt_table);
+
+ return 0;
+}
+
+/* These functions are called when PAGE_SIZE exceeds the GART page size */
+
+static int intel_i460_insert_memory_cpk(agp_memory * mem,
+ off_t pg_start, int type)
+{
+ int i, j, k, num_entries;
+ void *temp;
+ unsigned long paddr;
+ unsigned int read_back;
+
+ /*
+ * The rest of the kernel will compute page offsets in terms of
+ * PAGE_SIZE.
+ */
+ pg_start = I460_CPAGES_PER_KPAGE * pg_start;
+
+ temp = agp_bridge.current_size;
+ num_entries = A_SIZE_8(temp)->num_entries;
+
+ if ((pg_start + I460_CPAGES_PER_KPAGE * mem->page_count) > num_entries) {
+ printk(KERN_WARNING PFX "Looks like we're out of AGP memory\n");
+ return -EINVAL;
+ }
+
+ j = pg_start;
+ while (j < (pg_start + I460_CPAGES_PER_KPAGE * mem->page_count)) {
+ if (!PGE_EMPTY(agp_bridge.gatt_table[j])) {
+ return -EBUSY;
+ }
+ j++;
+ }
+
+ for (i = 0, j = pg_start; i < mem->page_count; i++) {
+
+ paddr = mem->memory[i];
+
+ for (k = 0; k < I460_CPAGES_PER_KPAGE; k++, j++, paddr += intel_i460_pagesize)
+ agp_bridge.gatt_table[j] = (unsigned int)
+ agp_bridge.mask_memory(paddr, mem->type);
+ }
+
+ /*
+ * The 460 spec says we have to read the last location written to
+ * make sure that all writes have taken effect
+ */
+ read_back = agp_bridge.gatt_table[j - 1];
+
+ return 0;
+}
+
+static int intel_i460_remove_memory_cpk(agp_memory * mem, off_t pg_start,
+ int type)
+{
+ int i;
+ unsigned int read_back;
+
+ pg_start = I460_CPAGES_PER_KPAGE * pg_start;
+
+ for (i = pg_start; i < (pg_start + I460_CPAGES_PER_KPAGE *
+ mem->page_count); i++)
+ agp_bridge.gatt_table[i] = 0;
+
+ /*
+ * The 460 spec says we have to read the last location written to
+ * make sure that all writes have taken effect
+ */
+ read_back = agp_bridge.gatt_table[i - 1];
+
+ return 0;
+}
+
+/*
+ * These functions are called when the 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 structures i460_pg_count
+ * and i460_pg_detail track partial allocation of the large GART pages to
+ * work around this issue.
+ *
+ * i460_pg_count[pg_num] tracks the number of kernel pages in use within
+ * GART page pg_num. i460_pg_detail[pg_num] is an array containing a
+ * psuedo-GART entry for each of the aforementioned kernel pages. The whole
+ * of i460_pg_detail is equivalent to a giant GATT with page size equal to
+ * that of the kernel.
+ */
+
+static void *intel_i460_alloc_large_page(int pg_num)
+{
+ int i;
+ void *bp, *bp_end;
+ struct page *page;
+
+ i460_pg_detail[pg_num] = (void *) vmalloc(sizeof(u32) *
+ I460_KPAGES_PER_CPAGE);
+ if (i460_pg_detail[pg_num] == NULL) {
+ printk(KERN_WARNING PFX "Out of memory, we're in trouble...\n");
+ return NULL;
+ }
+
+ for (i = 0; i < I460_KPAGES_PER_CPAGE; i++)
+ i460_pg_detail[pg_num][i] = 0;
+
+ bp = (void *) __get_free_pages(GFP_KERNEL,
+ intel_i460_pageshift - PAGE_SHIFT);
+ if (bp == NULL) {
+ printk(KERN_WARNING PFX "Couldn't alloc 4M GART page...\n");
+ return NULL;
+ }
+
+ bp_end = bp + ((PAGE_SIZE *
+ (1 << (intel_i460_pageshift - PAGE_SHIFT))) - 1);
+
+ for (page = virt_to_page(bp); page <= virt_to_page(bp_end); page++) {
+ atomic_inc(&page->count);
+ set_bit(PG_locked, &page->flags);
+ atomic_inc(&agp_bridge.current_memory_agp);
+ }
+
+ return bp;
+}
+
+static void intel_i460_free_large_page(int pg_num, unsigned long addr)
+{
+ struct page *page;
+ void *bp, *bp_end;
+
+ bp = (void *) __va(addr);
+ bp_end = bp + (PAGE_SIZE *
+ (1 << (intel_i460_pageshift - PAGE_SHIFT)));
+
+ vfree(i460_pg_detail[pg_num]);
+ i460_pg_detail[pg_num] = NULL;
+
+ for (page = virt_to_page(bp); page < virt_to_page(bp_end); page++) {
+ put_page(page);
+ UnlockPage(page);
+ atomic_dec(&agp_bridge.current_memory_agp);
+ }
+
+ free_pages((unsigned long) bp, intel_i460_pageshift - PAGE_SHIFT);
+}
+
+static int intel_i460_insert_memory_kpc(agp_memory * mem,
+ off_t pg_start, int type)
+{
+ int i, pg, start_pg, end_pg, start_offset, end_offset, idx;
+ int num_entries;
+ void *temp;
+ unsigned int read_back;
+ unsigned long paddr;
+
+ 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_pg = pg_start / I460_KPAGES_PER_CPAGE;
+ start_offset = pg_start % I460_KPAGES_PER_CPAGE;
+ end_pg = (pg_start + mem->page_count - 1) /
+ I460_KPAGES_PER_CPAGE;
+ end_offset = (pg_start + mem->page_count - 1) %
+ I460_KPAGES_PER_CPAGE;
+
+ if (end_pg > num_entries) {
+ printk(KERN_WARNING PFX "Looks like we're out of AGP memory\n");
+ return -EINVAL;
+ }
+
+ /* Check if the requested region of the aperture is free */
+ for (pg = start_pg; pg <= end_pg; pg++) {
+ /* Allocate new GART pages if necessary */
+ if (i460_pg_detail[pg] == NULL) {
+ temp = intel_i460_alloc_large_page(pg);
+ if (temp == NULL)
+ return -ENOMEM;
+ agp_bridge.gatt_table[pg] = agp_bridge.mask_memory(
+ (unsigned long) temp, 0);
+ read_back = agp_bridge.gatt_table[pg];
+ }
+
+ for (idx = ((pg == start_pg) ? start_offset : 0);
+ idx < ((pg == end_pg) ? (end_offset + 1)
+ : I460_KPAGES_PER_CPAGE);
+ idx++) {
+ if(i460_pg_detail[pg][idx] != 0)
+ return -EBUSY;
+ }
+ }
+
+ for (pg = start_pg, i = 0; pg <= end_pg; pg++) {
+ paddr = intel_i460_unmask_memory(agp_bridge.gatt_table[pg]);
+ for (idx = ((pg == start_pg) ? start_offset : 0);
+ idx < ((pg == end_pg) ? (end_offset + 1)
+ : I460_KPAGES_PER_CPAGE);
+ idx++, i++) {
+ mem->memory[i] = paddr + (idx * PAGE_SIZE);
+ i460_pg_detail[pg][idx] =
+ agp_bridge.mask_memory(mem->memory[i], mem->type);
+
+ i460_pg_count[pg]++;
+ }
+ }
+
+ return 0;
+}
+
+static int intel_i460_remove_memory_kpc(agp_memory * mem,
+ off_t pg_start, int type)
+{
+ int i, pg, start_pg, end_pg, start_offset, end_offset, idx;
+ int num_entries;
+ void *temp;
+ unsigned int read_back;
+ unsigned long paddr;
+
+ 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_pg = pg_start / I460_KPAGES_PER_CPAGE;
+ start_offset = pg_start % I460_KPAGES_PER_CPAGE;
+ end_pg = (pg_start + mem->page_count - 1) /
+ I460_KPAGES_PER_CPAGE;
+ end_offset = (pg_start + mem->page_count - 1) %
+ I460_KPAGES_PER_CPAGE;
+
+ for (i = 0, pg = start_pg; pg <= end_pg; pg++) {
+ for (idx = ((pg == start_pg) ? start_offset : 0);
+ idx < ((pg == end_pg) ? (end_offset + 1)
+ : I460_KPAGES_PER_CPAGE);
+ idx++, i++) {
+ mem->memory[i] = 0;
+ i460_pg_detail[pg][idx] = 0;
+ i460_pg_count[pg]--;
+ }
+
+ /* Free GART pages if they are unused */
+ if (i460_pg_count[pg] == 0) {
+ paddr = intel_i460_unmask_memory(agp_bridge.gatt_table[pg]);
+ agp_bridge.gatt_table[pg] = agp_bridge.scratch_page;
+ read_back = agp_bridge.gatt_table[pg];
+
+ intel_i460_free_large_page(pg, paddr);
+ }
+ }
+
+ return 0;
+}
+
+/* Dummy routines to call the approriate {cpk,kpc} function */
+
+static int intel_i460_insert_memory(agp_memory * mem,
+ off_t pg_start, int type)
+{
+ if (intel_i460_cpk)
+ return intel_i460_insert_memory_cpk(mem, pg_start, type);
+ else
+ return intel_i460_insert_memory_kpc(mem, pg_start, type);
+}
+
+static int intel_i460_remove_memory(agp_memory * mem,
+ off_t pg_start, int type)
+{
+ if (intel_i460_cpk)
+ return intel_i460_remove_memory_cpk(mem, pg_start, type);
+ else
+ return intel_i460_remove_memory_kpc(mem, pg_start, type);
+}
+
+/*
+ * If the kernel page size is smaller that the chipset 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). Consequently, don't allocate or free anything
+ * if i460_cpk (meaning chipset pages per kernel page) isn't set.
+ *
+ * Let's just hope nobody counts on the allocated AGP memory being there
+ * before bind time (I don't think current drivers do)...
+ */
+static unsigned long intel_i460_alloc_page(void)
+{
+ if (intel_i460_cpk)
+ return agp_generic_alloc_page();
+
+ /* Returning NULL would cause problems */
+ return ((unsigned long) ~0UL);
+}
+
+static void intel_i460_destroy_page(unsigned long page)
+{
+ if (intel_i460_cpk)
+ agp_generic_destroy_page(page);
+}
+
+static aper_size_info_8 intel_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 int __init intel_i460_setup(struct pci_dev *pdev)
+{
+ agp_bridge.masks = intel_i460_masks;
+ agp_bridge.aperture_sizes = (void *) intel_i460_sizes;
+ agp_bridge.size_type = U8_APER_SIZE;
+ agp_bridge.num_aperture_sizes = 3;
+ agp_bridge.dev_private_data = NULL;
+ agp_bridge.needs_scratch_page = FALSE;
+ agp_bridge.configure = intel_i460_configure;
+ agp_bridge.fetch_size = intel_i460_fetch_size;
+ agp_bridge.cleanup = intel_i460_cleanup;
+ agp_bridge.tlb_flush = intel_i460_tlb_flush;
+ agp_bridge.mask_memory = intel_i460_mask_memory;
+ agp_bridge.agp_enable = agp_generic_agp_enable;
+ agp_bridge.cache_flush = global_cache_flush;
+ agp_bridge.create_gatt_table = intel_i460_create_gatt_table;
+ agp_bridge.free_gatt_table = intel_i460_free_gatt_table;
+ agp_bridge.insert_memory = intel_i460_insert_memory;
+ agp_bridge.remove_memory = intel_i460_remove_memory;
+ agp_bridge.alloc_by_type = agp_generic_alloc_by_type;
+ agp_bridge.free_by_type = agp_generic_free_by_type;
+ agp_bridge.agp_alloc_page = intel_i460_alloc_page;
+ agp_bridge.agp_destroy_page = intel_i460_destroy_page;
+ agp_bridge.suspend = agp_generic_suspend;
+ agp_bridge.resume = agp_generic_resume;
+ agp_bridge.cant_use_aperture = 1;
+
+ return 0;
+
+ (void) pdev; /* unused */
+}
+
+#endif /* CONFIG_AGP_I460 */
#ifdef CONFIG_AGP_INTEL
@@ -4608,6 +5204,15 @@
#endif /* CONFIG_AGP_INTEL */
+#ifdef CONFIG_AGP_I460
+ { PCI_DEVICE_ID_INTEL_460GX,
+ PCI_VENDOR_ID_INTEL,
+ INTEL_460GX,
+ "Intel",
+ "460GX",
+ intel_i460_setup },
+#endif
+
#ifdef CONFIG_AGP_SIS
{ PCI_DEVICE_ID_SI_740,
PCI_VENDOR_ID_SI,
diff -Nru a/drivers/char/drm/drm_agpsupport.h b/drivers/char/drm/drm_agpsupport.h
--- a/drivers/char/drm/drm_agpsupport.h Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm/drm_agpsupport.h Fri Sep 27 13:24:23 2002
@@ -270,6 +270,7 @@
case INTEL_I840: head->chipset = "Intel i840"; break;
case INTEL_I845: head->chipset = "Intel i845"; break;
case INTEL_I850: head->chipset = "Intel i850"; break;
+ case INTEL_460GX: head->chipset = "Intel 460GX"; break;
case VIA_GENERIC: head->chipset = "VIA"; break;
case VIA_VP3: head->chipset = "VIA VP3"; break;
diff -Nru a/drivers/char/drm/r128_cce.c b/drivers/char/drm/r128_cce.c
--- a/drivers/char/drm/r128_cce.c Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm/r128_cce.c Fri Sep 27 13:24:23 2002
@@ -316,7 +316,7 @@
static void r128_cce_init_ring_buffer( drm_device_t *dev,
drm_r128_private_t *dev_priv )
{
- u32 ring_start;
+ u32 ring_start, rptr_addr;
u32 tmp;
DRM_DEBUG( "%s\n", __FUNCTION__ );
@@ -340,8 +340,24 @@
SET_RING_HEAD( &dev_priv->ring, 0 );
if ( !dev_priv->is_pci ) {
- R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR,
- dev_priv->ring_rptr->offset );
+ /*
+ * 460GX doesn't claim PCI writes from the card into
+ * the AGP aperture, so we have to get space outside
+ * the aperture for RPTR_ADDR.
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off;
+
+ alt_rh_off = __get_free_page(GFP_KERNEL | GFP_DMA);
+ atomic_inc(&virt_to_page(alt_rh_off)->count);
+ set_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+
+ dev_priv->ring.head = (__volatile__ u32 *) alt_rh_off;
+ SET_RING_HEAD( &dev_priv->ring, 0 );
+ rptr_addr = __pa( dev_priv->ring.head );
+ } else
+ rptr_addr = dev_priv->ring_rptr->offset;
+ R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR, rptr_addr );
} else {
drm_sg_mem_t *entry = dev->sg;
unsigned long tmp_ofs, page_ofs;
@@ -633,6 +649,19 @@
DRM_ERROR( "failed to cleanup PCI GART!\n" );
}
+ /*
+ * Free the page we grabbed for RPTR_ADDR
+ */
+ if ( !dev_priv->is_pci && dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off =
+ (unsigned long) dev_priv->ring.head;
+
+ atomic_dec(&virt_to_page(alt_rh_off)->count);
+ clear_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+ wake_up(&virt_to_page(alt_rh_off)->wait);
+ free_page(alt_rh_off);
+ }
+
DRM(free)( dev->dev_private, sizeof(drm_r128_private_t),
DRM_MEM_DRIVER );
dev->dev_private = NULL;
diff -Nru a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
--- a/drivers/char/drm/radeon_cp.c Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm/radeon_cp.c Fri Sep 27 13:24:23 2002
@@ -574,7 +574,7 @@
static void radeon_cp_init_ring_buffer( drm_device_t *dev,
drm_radeon_private_t *dev_priv )
{
- u32 ring_start, cur_read_ptr;
+ u32 ring_start, cur_read_ptr, rptr_addr;
u32 tmp;
/* Initialize the memory controller */
@@ -611,8 +611,24 @@
dev_priv->ring.tail = cur_read_ptr;
if ( !dev_priv->is_pci ) {
- RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR,
- dev_priv->ring_rptr->offset );
+ /*
+ * 460GX doesn't claim PCI writes from the card into
+ * the AGP aperture, so we have to get space outside
+ * the aperture for RPTR_ADDR.
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off;
+
+ alt_rh_off = __get_free_page(GFP_KERNEL | GFP_DMA);
+ atomic_inc(&virt_to_page(alt_rh_off)->count);
+ set_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+
+ dev_priv->ring.head = (__volatile__ u32 *) alt_rh_off;
+ *dev_priv->ring.head = cur_read_ptr;
+ rptr_addr = __pa( dev_priv->ring.head );
+ } else
+ rptr_addr = dev_priv->ring_rptr->offset;
+ RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR, rptr_addr );
} else {
drm_sg_mem_t *entry = dev->sg;
unsigned long tmp_ofs, page_ofs;
@@ -992,6 +1008,19 @@
DRM_ERROR( "failed to cleanup PCI GART!\n" );
}
+ /*
+ * Free the page we grabbed for RPTR_ADDR
+ */
+ if ( !dev_priv->is_pci && dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off =
+ (unsigned long) dev_priv->ring.head;
+
+ atomic_dec(&virt_to_page(alt_rh_off)->count);
+ clear_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+ wake_up(&virt_to_page(alt_rh_off)->wait);
+ free_page(alt_rh_off);
+ }
+
DRM(free)( dev->dev_private, sizeof(drm_radeon_private_t),
DRM_MEM_DRIVER );
dev->dev_private = NULL;
diff -Nru a/drivers/char/drm-4.0/agpsupport.c b/drivers/char/drm-4.0/agpsupport.c
--- a/drivers/char/drm-4.0/agpsupport.c Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm-4.0/agpsupport.c Fri Sep 27 13:24:23 2002
@@ -265,6 +265,7 @@
#if LINUX_VERSION_CODE >= 0x020400
case INTEL_I840: head->chipset = "Intel i840"; break;
#endif
+ case INTEL_460GX: head->chipset = "Intel 460GX"; break;
case VIA_GENERIC: head->chipset = "VIA"; break;
case VIA_VP3: head->chipset = "VIA VP3"; break;
diff -Nru a/drivers/char/drm-4.0/r128_cce.c b/drivers/char/drm-4.0/r128_cce.c
--- a/drivers/char/drm-4.0/r128_cce.c Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm-4.0/r128_cce.c Fri Sep 27 13:24:23 2002
@@ -331,7 +344,7 @@
static void r128_cce_init_ring_buffer( drm_device_t *dev )
{
drm_r128_private_t *dev_priv = dev->dev_private;
- u32 ring_start;
+ u32 ring_start, rptr_addr;
u32 tmp;
/* The manual (p. 2) says this address is in "VM space". This
@@ -343,10 +356,27 @@
R128_WRITE( R128_PM4_BUFFER_DL_WPTR, 0 );
R128_WRITE( R128_PM4_BUFFER_DL_RPTR, 0 );
+ /*
+ * 460GX doesn't claim PCI writes from the card into the AGP
+ * aperture, so we have to get space outside the aperture for
+ * RPTR_ADDR.
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off;
+
+ alt_rh_off = __get_free_page(GFP_KERNEL | GFP_DMA);
+ atomic_inc(&virt_to_page(alt_rh_off)->count);
+ set_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+
+ dev_priv->ring.head = (__volatile__ u32 *) alt_rh_off;
+ rptr_addr = __pa( dev_priv->ring.head );
+ } else {
+ rptr_addr = dev_priv->ring_rptr->offset;
+ }
+
/* DL_RPTR_ADDR is a physical address in AGP space. */
*dev_priv->ring.head = 0;
- R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR,
- dev_priv->ring_rptr->offset );
+ R128_WRITE( R128_PM4_BUFFER_DL_RPTR_ADDR, rptr_addr );
/* Set watermark control */
R128_WRITE( R128_PM4_BUFFER_WM_CNTL,
@@ -530,6 +560,19 @@
DO_REMAPFREE( dev_priv->agp_textures, dev );
}
#endif
+
+ /*
+ * Free the page we grabbed for RPTR_ADDR
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off =
+ (unsigned long) dev_priv->ring.head;
+
+ atomic_dec(&virt_to_page(alt_rh_off)->count);
+ clear_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+ wake_up(&virt_to_page(alt_rh_off)->wait);
+ free_page(alt_rh_off);
+ }
drm_free( dev->dev_private, sizeof(drm_r128_private_t),
DRM_MEM_DRIVER );
diff -Nru a/drivers/char/drm-4.0/radeon_cp.c b/drivers/char/drm-4.0/radeon_cp.c
--- a/drivers/char/drm-4.0/radeon_cp.c Fri Sep 27 13:24:23 2002
+++ b/drivers/char/drm-4.0/radeon_cp.c Fri Sep 27 13:24:23 2002
@@ -570,7 +570,7 @@
static void radeon_cp_init_ring_buffer( drm_device_t *dev )
{
drm_radeon_private_t *dev_priv = dev->dev_private;
- u32 ring_start, cur_read_ptr;
+ u32 ring_start, cur_read_ptr, rptr_addr;
u32 tmp;
/* Initialize the memory controller */
@@ -593,10 +593,29 @@
/* Initialize the ring buffer's read and write pointers */
cur_read_ptr = RADEON_READ( RADEON_CP_RB_RPTR );
RADEON_WRITE( RADEON_CP_RB_WPTR, cur_read_ptr );
+
*dev_priv->ring.head = cur_read_ptr;
dev_priv->ring.tail = cur_read_ptr;
- RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR, dev_priv->ring_rptr->offset );
+ /*
+ * 460GX doesn't claim PCI writes from the card into the AGP
+ * aperture, so we have to get space outside the aperture for
+ * RPTR_ADDR.
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off;
+
+ alt_rh_off = __get_free_page(GFP_KERNEL | GFP_DMA);
+ atomic_inc(&virt_to_page(alt_rh_off)->count);
+ set_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+
+ dev_priv->ring.head = (__volatile__ u32 *) alt_rh_off;
+ *dev_priv->ring.head = cur_read_ptr;
+ rptr_addr = __pa( dev_priv->ring.head );
+ } else
+ rptr_addr = dev_priv->ring_rptr->offset;
+
+ RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR, rptr_addr);
/* Set ring buffer size */
RADEON_WRITE( RADEON_CP_RB_CNTL, dev_priv->ring.size_l2qw );
@@ -837,6 +856,19 @@
DO_IOREMAPFREE( dev_priv->agp_textures, dev );
}
#endif
+
+ /*
+ * Free the page we grabbed for RPTR_ADDR.
+ */
+ if ( dev->agp->agp_info.chipset == INTEL_460GX ) {
+ unsigned long alt_rh_off =
+ (unsigned long) dev_priv->ring.head;
+
+ atomic_dec(&virt_to_page(alt_rh_off)->count);
+ clear_bit(PG_locked, &virt_to_page(alt_rh_off)->flags);
+ wake_up(&virt_to_page(alt_rh_off)->wait);
+ free_page(alt_rh_off);
+ }
drm_free( dev->dev_private, sizeof(drm_radeon_private_t),
DRM_MEM_DRIVER );
diff -Nru a/include/linux/agp_backend.h b/include/linux/agp_backend.h
--- a/include/linux/agp_backend.h Fri Sep 27 13:24:23 2002
+++ b/include/linux/agp_backend.h Fri Sep 27 13:24:23 2002
@@ -53,6 +53,7 @@
INTEL_I845,
INTEL_I850,
INTEL_I860,
+ INTEL_460GX,
VIA_GENERIC,
VIA_VP3,
VIA_MVP3,
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2002-09-28 4:34 [PATCH] AGPGART 5/5: Intel 460GX support Bjorn Helgaas
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