redonkable/alistair23-linux
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drm/nvd0/disp: whip up some basic dma handling for the evo channels

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Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2011-07-05 10:33:08 +10:00
parent 26f6d88b32
commit 51beb428e4
1 changed files with 65 additions and 3 deletions
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68
drivers/gpu/drm/nouveau/nvd0_display.c
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@ -22,6 +22,7 @@
* Authors: Ben Skeggs
*/
#include <linux/dma-mapping.h>
#include "drmP.h"
#include "nouveau_drv.h"
@ -31,6 +32,10 @@
struct nvd0_display {
struct nouveau_gpuobj *mem;
struct {
dma_addr_t handle;
u32 *ptr;
} evo[1];
};
static struct nvd0_display *
@ -40,6 +45,50 @@ nvd0_display(struct drm_device *dev)
return dev_priv->engine.display.priv;
}
static int
evo_icmd(struct drm_device *dev, int id, u32 mthd, u32 data)
{
int ret = 0;
nv_mask(dev, 0x610700 + (id * 0x10), 0x00000001, 0x00000001);
nv_wr32(dev, 0x610704 + (id * 0x10), data);
nv_mask(dev, 0x610704 + (id * 0x10), 0x80000ffc, 0x80000000 | mthd);
if (!nv_wait(dev, 0x610704 + (id * 0x10), 0x80000000, 0x00000000))
ret = -EBUSY;
nv_mask(dev, 0x610700 + (id * 0x10), 0x00000001, 0x00000000);
return ret;
}
static u32 *
evo_wait(struct drm_device *dev, int id, int nr)
{
struct nvd0_display *disp = nvd0_display(dev);
u32 put = nv_rd32(dev, 0x640000 + (id * 0x1000)) / 4;
if (put + nr >= (PAGE_SIZE / 4)) {
disp->evo[id].ptr[put] = 0x20000000;
nv_wr32(dev, 0x640000 + (id * 0x1000), 0x00000000);
if (!nv_wait(dev, 0x640004 + (id * 0x1000), ~0, 0x00000000)) {
NV_ERROR(dev, "evo %d dma stalled\n", id);
return NULL;
}
put = 0;
}
return disp->evo[id].ptr + put;
}
static void
evo_kick(u32 *push, struct drm_device *dev, int id)
{
struct nvd0_display *disp = nvd0_display(dev);
nv_wr32(dev, 0x640000 + (id * 0x1000), (push - disp->evo[id].ptr) << 2);
}
#define evo_mthd(p,m,s) *((p)++) = (((s) << 18) | (m))
#define evo_data(p,d) *((p)++) = (d)
/******************************************************************************
* DAC
*****************************************************************************/
@ -100,7 +149,7 @@ nvd0_display_init(struct drm_device *dev)
nv_wr32(dev, 0x610010, (disp->mem->vinst >> 8) | 9);
/* init master */
nv_wr32(dev, 0x610494, ((disp->mem->vinst + 0x1000) >> 8) | 1);
nv_wr32(dev, 0x610494, (disp->evo[0].handle >> 8) | 3);
nv_wr32(dev, 0x610498, 0x00010000);
nv_wr32(dev, 0x61049c, 0x00000000);
nv_mask(dev, 0x610490, 0x00000010, 0x00000010);
@ -135,11 +184,14 @@ nvd0_display_destroy(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct nvd0_display *disp = nvd0_display(dev);
struct pci_dev *pdev = dev->pdev;
nvd0_display_fini(dev);
dev_priv->engine.display.priv = NULL;
pci_free_consistent(pdev, PAGE_SIZE, disp->evo[0].ptr, disp->evo[0].handle);
nouveau_gpuobj_ref(NULL, &disp->mem);
dev_priv->engine.display.priv = NULL;
kfree(disp);
}
@ -147,6 +199,7 @@ int
nvd0_display_create(struct drm_device *dev)
{
struct drm_nouveau_private *dev_priv = dev->dev_private;
struct pci_dev *pdev = dev->pdev;
struct nvd0_display *disp;
int ret;
@ -155,10 +208,19 @@ nvd0_display_create(struct drm_device *dev)
return -ENOMEM;
dev_priv->engine.display.priv = disp;
ret = nouveau_gpuobj_new(dev, NULL, 8 * 1024, 0x1000, 0, &disp->mem);
/* hash table and dma objects for the memory areas we care about */
ret = nouveau_gpuobj_new(dev, NULL, 4 * 1024, 0x1000, 0, &disp->mem);
if (ret)
goto out;
/* push buffers for evo channels */
disp->evo[0].ptr =
pci_alloc_consistent(pdev, PAGE_SIZE, &disp->evo[0].handle);
if (!disp->evo[0].ptr) {
ret = -ENOMEM;
goto out;
}
ret = nvd0_display_init(dev);
if (ret)
goto out;