renesas/drm.git - libdrm, cloned from git://anongit.freedesktop.org/mesa/drm

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author	Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>	2008-02-28 13:47:15 +0100
committer	Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>	2008-02-28 14:06:46 +0100
commit	8ef838e5ff7b3c005d7fbc725e17bcccd0e1e1eb (patch)
tree	7c772349e4cd4a3196221a7aeee705b8238b58d6 /README
parent	fd595fa4dc6f788a8a1e1b56178e15f411706cb9 (diff)

Add a compat kmap_atomic_prot_pfn to do quick kernel map / unmaps of

PCI- or high memory. This is substantially more efficient than drm_bo_kmap, since the mapping only lives on a single processor. Unmapping is done use kunmap_atomic(). Flushes only a single tlb() entry. Add a support utility int drm_bo_pfn_prot() that returns the pfn and desired page protection for a given bo offset. This is all intended for relocations in bound TTMS or vram. Mapping-accessing-unmapping must be atomic, either using preempt_xx() macros or a spinlock.

Diffstat (limited to 'README')

0 files changed, 0 insertions, 0 deletions

/* $Id$ * ffb_drv.c: Creator/Creator3D direct rendering driver. * * Copyright (C) 2000 David S. Miller (davem@redhat.com) */ #include <linux/config.h> #include "ffb.h" #include "drmP.h" #include "ffb_drv.h" #include <linux/sched.h> #include <linux/smp_lock.h> #include <asm/shmparam.h> #include <asm/oplib.h> #include <asm/upa.h> #define DRIVER_AUTHOR "David S. Miller" #define DRIVER_NAME "ffb" #define DRIVER_DESC "Creator/Creator3D" #define DRIVER_DATE "20000517" #define DRIVER_MAJOR 0 #define DRIVER_MINOR 0 #define DRIVER_PATCHLEVEL 1 typedef struct _ffb_position_t { int node; int root; } ffb_position_t; static ffb_position_t *ffb_position; static void get_ffb_type(ffb_dev_priv_t *ffb_priv, int instance) { volatile unsigned char *strap_bits; unsigned char val; strap_bits = (volatile unsigned char *) (ffb_priv->card_phys_base + 0x00200000UL); /* Don't ask, you have to read the value twice for whatever * reason to get correct contents. */ val = upa_readb(strap_bits); val = upa_readb(strap_bits); switch (val & 0x78) { case (0x0 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb1_prototype; printk("ffb%d: Detected FFB1 pre-FCS prototype\n", instance); break; case (0x0 << 5) | (0x1 << 3): ffb_priv->ffb_type = ffb1_standard; printk("ffb%d: Detected FFB1\n", instance); break; case (0x0 << 5) | (0x3 << 3): ffb_priv->ffb_type = ffb1_speedsort; printk("ffb%d: Detected FFB1-SpeedSort\n", instance); break; case (0x1 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb2_prototype; printk("ffb%d: Detected FFB2/vertical pre-FCS prototype\n", instance); break; case (0x1 << 5) | (0x1 << 3): ffb_priv->ffb_type = ffb2_vertical; printk("ffb%d: Detected FFB2/vertical\n", instance); break; case (0x1 << 5) | (0x2 << 3): ffb_priv->ffb_type = ffb2_vertical_plus; printk("ffb%d: Detected FFB2+/vertical\n", instance); break; case (0x2 << 5) | (0x0 << 3): ffb_priv->ffb_type = ffb2_horizontal; printk("ffb%d: Detected FFB2/horizontal\n", instance); break; case (0x2 << 5) | (0x2 << 3): ffb_priv->ffb_type = ffb2_horizontal; printk("ffb%d: Detected FFB2+/horizontal\n", instance); break; default: ffb_priv->ffb_type = ffb2_vertical; printk("ffb%d: Unknown boardID[%08x], assuming FFB2\n", instance, val); break; }; } static void ffb_apply_upa_parent_ranges(int parent, struct linux_prom64_registers *regs) { struct linux_prom64_ranges ranges[PROMREG_MAX]; char name[128]; int len, i; prom_getproperty(parent, "name", name, sizeof(name)); if (strcmp(name, "upa") != 0) return; len = prom_getproperty(parent, "ranges", (void *) ranges, sizeof(ranges)); if (len <= 0) return; len /= sizeof(struct linux_prom64_ranges); for (i = 0; i < len; i++) { struct linux_prom64_ranges *rng = &ranges[i]; u64 phys_addr = regs->phys_addr; if (phys_addr >= rng->ot_child_base && phys_addr < (rng->ot_child_base + rng->or_size)) { regs->phys_addr -= rng->ot_child_base; regs->phys_addr += rng->ot_parent_base; return; } } return; } static int ffb_init_one(drm_device_t *dev, int prom_node, int parent_node, int instance) { struct linux_prom64_registers regs[2*PROMREG_MAX]; ffb_dev_priv_t *ffb_priv = (ffb_dev_priv_t *)dev->dev_private; int i; ffb_priv->prom_node = prom_node; if (prom_getproperty(ffb_priv->prom_node, "reg", (void *)regs, sizeof(regs)) <= 0) { return -EINVAL; } ffb_apply_upa_parent_ranges(parent_node, &regs[0]); ffb_priv->card_phys_base = regs[0].phys_addr;


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