Hi,
I'm porting DaVinci Video Capture driver davinci_vpfe, ccdc,
CMEMK and DSPLINKK to 2.6.19-rc3-omap1.
All the drivers and there dependencies compile, link and load.
But when I try to run "decode", CMEMK fails in get_phys().
(I've put some extra prints into get_phys).
See below...
//--------- cmemk.c -------------------------------------------
unsigned long get_phys(unsigned long virtp)
{
pgd_t *pgd;
pmd_t *pmd;
pte_t *pte;
struct mm_struct *mm = current->mm;
pgd = pgd_offset(mm, virtp);
__D("get_phys(): pgd = 0x%X virtp = 0x%X \n",
(unsigned)pgd_val(pgd), (unsigned)virtp); // TBD: A.R. Debug
if (!(pgd_none(*pgd) || pgd_bad(*pgd))) {
pmd = pmd_offset(pgd, virtp);
__D("get_phys(): pmd = 0x%X \n", (unsigned)pmd_val(pmd)); //
TBD: A.R. Debug
__D("get_phys(): pmd_none = 0x%X pmd_bad = 0x%X \n",
(unsigned)pmd_none(*pmd), (unsigned)pmd_bad(*pmd)); // TBD: A.R. Debug
if (!(pmd_none(*pmd) || pmd_bad(*pmd))) {
pte = pte_offset_kernel(pmd, virtp);
__D("get_phys(): pte = 0x%X pte_present = %d \n",
(unsigned)pte_val(pte), (unsigned)pte_present(*pte));
// TBD: A.R. Debug
if (pte_present(*pte)) {
__D("get_phys(): pte_page = 0x%X page_address = 0x%X
virtp & ~PAGE_MASK = 0x%X \n",
(unsigned)pte_page(*pte),
(unsigned)page_address(pte_page(*pte)),
(unsigned)(virtp & ~PAGE_MASK)); // TBD: A.R.
Debug
return __pa(page_address(pte_page(*pte)) +
(virtp & ~PAGE_MASK));
}
}
}
return 0;
}
//------------------------------------------------------------
==== 2.6.19-rc3-omap1 DMESG ====
MEMK Debug: ** CMEM kernel module built: Jan 10 2007 14:44:55
CMEMK Debug: Allocated major number: 254
CMEMK Debug: Allocating 1 buffers of size 3145728 (requested 3145728)
CMEMK Debug: alloc_pool_buffer: Called for size 3145728
CMEMK Debug: alloc_pool_buffer: Fits req 3145728 < avail: 8388608
CMEMK Debug: alloc_pool_buffer: new available block size is 5242880
CMEMK Debug: alloc_pool_buffer: returning allocated buffer at 0xc9500000
CMEMK Debug: get_phys(): pgd = 0xC6713250 virtp = 0xC9500000
CMEMK Debug: get_phys(): pmd = 0xC6713250
CMEMK Debug: get_phys(): pmd_none = 0x0 pmd_bad = 0x2
CMEMK Debug: Allocated buffer 0, virtual 0xc9500000 and physical 0x0 and
size 3145728
CMEMK Debug: Busylist for pool 0:
CMEMK Debug: Freelist for pool 0:
CMEMK Debug: Free: Buffer with id 0 and physical address 0x0
CMEMK Debug: Allocating 1 buffers of size 204800 (requested 202752)
CMEMK Debug: alloc_pool_buffer: Called for size 204800
CMEMK Debug: alloc_pool_buffer: Fits req 204800 < avail: 5242880
CMEMK Debug: alloc_pool_buffer: new available block size is 5038080
CMEMK Debug: alloc_pool_buffer: returning allocated buffer at 0xc94ce000
CMEMK Debug: get_phys(): pgd = 0xC6713250 virtp = 0xC94CE000
CMEMK Debug: get_phys(): pmd = 0xC6713250
CMEMK Debug: get_phys(): pmd_none = 0x0 pmd_bad = 0x2
CMEMK Debug: Allocated buffer 0, virtual 0xc94ce000 and physical 0x0 and
size 204800
......
CMEMK Debug: GETSIZE ioctl received
CMEMK Debug: GETSIZE returning 3145728
CMEMK Debug: mmap: vma->vm_start = 0x41598000
CMEMK Debug: mmap: vma->vm_pgoff = 0x0
CMEMK Debug: mmap: vma->vm_end = 0x41898000
CMEMK Debug: mmap: size = 0x300000
CMEMK Debug: GETPHYS ioctl received.
CMEMK Debug: get_phys(): pgd = 0xC6665050 virtp = 0x41598000
CMEMK Debug: get_phys(): pmd = 0xC6665050
CMEMK Debug: get_phys(): pmd_none = 0x0 pmd_bad = 0x0
CMEMK Debug: get_phys(): pte = 0xC6105E60 pte_present = 1
CMEMK Debug: get_phys(): pte_page = 0xBF303000 page_address = 0x40000000
virtp & ~PAGE_MASK = 0x0
CMEMK Error: GETPHYS: Failed to convert virtual 0x41598000 to physical.
........
================
Do you have an idea why does it work with 2.6.10-mvl401 and fails with
2.6.19-rc3-omap1?
Thanks,
Alex
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