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[FreeBSD] IGP gart needs to be un-cached. 

Airlied inadvertently discovered that the IGP gart needs to be un-cached
for radeon rs485 and rs690 to work.  Initial tests by placing a wbinvd()
after allocating the gart were successful.  This is an attempt at a more
appropriate method of achieving success.
main
Robert Noland 2008-09-06 21:08:33 -04:00
parent be5fad45ee
commit 740f09bffd
1 changed files with 74 additions and 19 deletions
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87
bsd-core/ati_pcigart.c
View File

@ -39,31 +39,86 @@
#define ATI_PCIE_WRITE 0x4
#define ATI_PCIE_READ 0x8
static int drm_ati_alloc_pcigart_table(struct drm_device *dev,
static void
drm_ati_alloc_pcigart_table_cb(void *arg, bus_dma_segment_t *segs,
int nsegs, int error)
{
struct drm_dma_handle *dmah = arg;
if (error != 0)
return;
KASSERT(nsegs == 1,
("drm_ati_alloc_pcigart_table_cb: bad dma segment count"));
dmah->busaddr = segs[0].ds_addr;
}
static int
drm_ati_alloc_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
drm_dma_handle_t *dmah;
struct drm_dma_handle *dmah;
int flags, ret;
DRM_UNLOCK();
dmah = drm_pci_alloc(dev, gart_info->table_size, PAGE_SIZE,
gart_info->table_mask);
DRM_LOCK();
dmah = malloc(sizeof(struct drm_dma_handle), M_DRM, M_ZERO | M_NOWAIT);
if (dmah == NULL)
return ENOMEM;
DRM_UNLOCK();
ret = bus_dma_tag_create(NULL, PAGE_SIZE, 0, /* tag, align, boundary */
gart_info->table_mask, BUS_SPACE_MAXADDR, /* lowaddr, highaddr */
NULL, NULL, /* filtfunc, filtfuncargs */
gart_info->table_size, 1, /* maxsize, nsegs */
gart_info->table_size, /* maxsegsize */
BUS_DMA_ALLOCNOW, NULL, NULL, /* flags, lockfunc, lockfuncargs */
&dmah->tag);
if (ret != 0) {
free(dmah, M_DRM);
return ENOMEM;
}
flags = BUS_DMA_NOWAIT | BUS_DMA_ZERO;
if (gart_info->gart_reg_if == DRM_ATI_GART_IGP)
flags |= BUS_DMA_NOCACHE;
ret = bus_dmamem_alloc(dmah->tag, &dmah->vaddr, flags, &dmah->map);
if (ret != 0) {
bus_dma_tag_destroy(dmah->tag);
free(dmah, M_DRM);
return ENOMEM;
}
DRM_LOCK();
ret = bus_dmamap_load(dmah->tag, dmah->map, dmah->vaddr,
gart_info->table_size, drm_ati_alloc_pcigart_table_cb, dmah, 0);
if (ret != 0) {
bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
bus_dma_tag_destroy(dmah->tag);
free(dmah, M_DRM);
return ENOMEM;
}
dev->sg->dmah = dmah;
return 0;
}
static void drm_ati_free_pcigart_table(struct drm_device *dev,
static void
drm_ati_free_pcigart_table(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
drm_pci_free(dev, dev->sg->dmah);
struct drm_dma_handle *dmah = dev->sg->dmah;
bus_dmamem_free(dmah->tag, dmah->vaddr, dmah->map);
bus_dma_tag_destroy(dmah->tag);
free(dmah, M_DRM);
dev->sg->dmah = NULL;
}
int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
int
drm_ati_pcigart_cleanup(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
/* we need to support large memory configurations */
if (dev->sg == NULL) {
@ -82,17 +137,17 @@ int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
return 1;
}
int drm_ati_pcigart_init(struct drm_device *dev,
int
drm_ati_pcigart_init(struct drm_device *dev,
struct drm_ati_pcigart_info *gart_info)
{
void *address = NULL;
unsigned long pages;
u32 *pci_gart, page_base;
dma_addr_t bus_address = 0;
dma_addr_t entry_addr;
int i, j, ret = 0;
int max_pages;
dma_addr_t entry_addr;
/* we need to support large memory configurations */
if (dev->sg == NULL) {
@ -134,12 +189,14 @@ int drm_ati_pcigart_init(struct drm_device *dev,
page_base = (u32) entry_addr & ATI_PCIGART_PAGE_MASK;
switch(gart_info->gart_reg_if) {
case DRM_ATI_GART_IGP:
page_base |= (upper_32_bits(entry_addr) & 0xff) << 4;
page_base |=
(upper_32_bits(entry_addr) & 0xff) << 4;
page_base |= 0xc;
break;
case DRM_ATI_GART_PCIE:
page_base >>= 8;
page_base |= (upper_32_bits(entry_addr) & 0xff) << 24;
page_base |=
(upper_32_bits(entry_addr) & 0xff) << 24;
page_base |= ATI_PCIE_READ | ATI_PCIE_WRITE;
break;
default:
@ -152,8 +209,6 @@ int drm_ati_pcigart_init(struct drm_device *dev,
}
}
DRM_MEMORYBARRIER();
ret = 1;
done: