Re: DSS2 failure with current linux-omap head
* Tomi Valkeinen [100521 01:03]:
> On Thu, 2010-05-20 at 00:33 +0200, ext Steve Sakoman wrote:
> > I did a quick test build of the current linux-omap head and get a
> > failure very early on in the boot process in
> > drivers/video/omap2/vram.c code:
> >
> > Illegal SDRAM size for VRAM
> >
> > It is generated by the following code:
> >
> > bdata = NODE_DATA(0)->bdata;
> > sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
> > sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
> >
> > if (paddr) {
> > if ((paddr & ~PAGE_MASK) || paddr < sdram_start ||
> > paddr + size > sdram_start + sdram_size) {
> > pr_err("Illegal SDRAM region for VRAM\n");
> > return;
> > }
> >
> > if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) {
> > pr_err("FB: failed to reserve VRAM\n");
> > return;
> > }
> > } else {
> > if (size > sdram_size) {
> > pr_err("Illegal SDRAM size for VRAM\n");
> > return;
> > }
> >
> > paddr = virt_to_phys(alloc_bootmem_pages(size));
> > BUG_ON(paddr & ~PAGE_MASK);
> > }
> >
> >
> > I modified the error pr_error to display the two values that are
> > compared to generate this error:
> >
> > Illegal SDRAM size for VRAM: size=0xc0 sdram_size=0x0
> >
> > So it appears that the method used to get the sdram size no longer
> > works since it returns a size of 0!
>
> I copied the method from the older omapfb driver, and I have to say that
> I've never looked at what it actually does. Perhaps there's a proper way
> to get the RAM starts and sizes somewhere...
FYI, Russell has several interesting omapfb patches in his lmb branch.
Please take a look at that, might make your life easier :)
Regards,
Tony
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Re: DSS2 failure with current linux-omap head
On 05/21/2010 03:07 AM, Tomi Valkeinen wrote:
On Thu, 2010-05-20 at 00:33 +0200, ext Steve Sakoman wrote:
I did a quick test build of the current linux-omap head and get a
failure very early on in the boot process in
drivers/video/omap2/vram.c code:
Illegal SDRAM size for VRAM
It is generated by the following code:
bdata = NODE_DATA(0)->bdata;
sdram_start = bdata->node_min_pfn<< PAGE_SHIFT;
sdram_size = (bdata->node_low_pfn<< PAGE_SHIFT) - sdram_start;
if (paddr) {
if ((paddr& ~PAGE_MASK) || paddr< sdram_start ||
paddr + size> sdram_start + sdram_size) {
pr_err("Illegal SDRAM region for VRAM\n");
return;
}
if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE)< 0) {
pr_err("FB: failed to reserve VRAM\n");
return;
}
} else {
if (size> sdram_size) {
pr_err("Illegal SDRAM size for VRAM\n");
return;
}
paddr = virt_to_phys(alloc_bootmem_pages(size));
BUG_ON(paddr& ~PAGE_MASK);
}
I modified the error pr_error to display the two values that are
compared to generate this error:
Illegal SDRAM size for VRAM: size=0xc0 sdram_size=0x0
So it appears that the method used to get the sdram size no longer
works since it returns a size of 0!
I copied the method from the older omapfb driver, and I have to say that
I've never looked at what it actually does. Perhaps there's a proper way
to get the RAM starts and sizes somewhere...
Tomi
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when i enable bootmem debug, I can see its trying to reserve VRAM memory
way before bootmem setup.
VRAM: vram size = 12582912
VRAM: min page frame #: 0
VRAM: low page frame #: 0
VRAM: SDRM start: 0
VRAM: SDRAM size = 0
Illegal SDRAM size for VRAM
bootmem::init_bootmem_core nid=0 start=8 map=87fff end=88000
mapsize=1000
bootmem::mark_bootmem_node nid=0 start=8 end=88000 reserve=0 flags=0
bootmem::__free nid=0 start=8 end=88000
bootmem::mark_bootmem_node nid=0 start=80004 end=80432 reserve=1 flags=0
bootmem::__reserve nid=0 start=80004 end=80432 flags=0
bootmem::mark_bootmem_node nid=0 start=81ffd end=82000 reserve=1 flags=0
bootmem::__reserve nid=0 start=81ffd end=82000 flags=0
bootmem::mark_bootmem_node nid=0 start=87fff end=88000 reserve=1 flags=0
bootmem::__reserve nid=0 start=87fff end=88000 flags=0
On node 0 totalpages: 32768
bootmem::alloc_bootmem_core nid=0 size=10 [256 pages] align=40
goal=bfff
limit=0
bootmem::__reserve nid=0 start=80432 end=80532 flags=1
free_area_init_node: node 0, pgdat c0415d3c, node_mem_map c0432000
Normal zone: 256 pages used for memmap
Normal zone: 0 pages reserved
Normal zone: 32512 pages, LIFO batch:7
bootmem::alloc_bootmem_core nid=0 size=c [1 pages] align=40
goal=bfff limit=
0
bootmem::__reserve nid=0 start=80532 end=80533 flags=1
bootmem::alloc_bootmem_core nid=0 size=400 [1 pages] align=40
goal=bfff limi
t=0
bootmem::__reserve nid=0 start=80533 end=80533 flags=1
bootmem::alloc_bootmem_core nid=0 size=1c [1 pages] align=40 goal=0
limit=ff
ff
bootmem::__reserve nid=0 start=80533 end=80533 flags=1
bootmem::alloc_bootmem_core nid=0 size=d5 [1 pages] align=40 goal=0 limit=0
bootmem::__reserve nid=0 start=80533 end=80533 flags=1
bootmem::alloc_bootmem_core nid=0 size=d5 [1 pages] align=40 goal=0 limit=0
bootmem::__reserve nid=0 start=80533 end=80533 flags=1
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 32512
bootmem::alloc_bootmem_core nid=0 size=800 [1 pages] align=40 goal=0 limit=0
bootmem::__reserve nid=0 start=80533 end=80533 flags=1
PID hash table entries: 512 (order: -1, 2048 bytes)
bootmem::alloc_bootmem_core nid=0 size=1 [16 pages] align=40 goal=0
limit=0
bootmem::__reserve nid=0 start=80533 end=80543 flags=1
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
bootmem::alloc_bootmem_core nid=0 size=8000 [8 pages] align=40 goal=0
limit=0
bootmem::__reserve nid=0 start=80543 end=8054b flags=1
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
bootmem::free_all_bootmem_core nid=0 start=8 end=88000 aligned=1
bootmem::free_all_bootmem_core nid=0 released=7ab6
Memory: 128MB = 128MB total
--
Best Regards,
Ragha
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Re: DSS2 failure with current linux-omap head
On Thu, 2010-05-20 at 00:33 +0200, ext Steve Sakoman wrote:
> I did a quick test build of the current linux-omap head and get a
> failure very early on in the boot process in
> drivers/video/omap2/vram.c code:
>
> Illegal SDRAM size for VRAM
>
> It is generated by the following code:
>
> bdata = NODE_DATA(0)->bdata;
> sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
> sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
>
> if (paddr) {
> if ((paddr & ~PAGE_MASK) || paddr < sdram_start ||
> paddr + size > sdram_start + sdram_size) {
> pr_err("Illegal SDRAM region for VRAM\n");
> return;
> }
>
> if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) {
> pr_err("FB: failed to reserve VRAM\n");
> return;
> }
> } else {
> if (size > sdram_size) {
> pr_err("Illegal SDRAM size for VRAM\n");
> return;
> }
>
> paddr = virt_to_phys(alloc_bootmem_pages(size));
> BUG_ON(paddr & ~PAGE_MASK);
> }
>
>
> I modified the error pr_error to display the two values that are
> compared to generate this error:
>
> Illegal SDRAM size for VRAM: size=0xc0 sdram_size=0x0
>
> So it appears that the method used to get the sdram size no longer
> works since it returns a size of 0!
I copied the method from the older omapfb driver, and I have to say that
I've never looked at what it actually does. Perhaps there's a proper way
to get the RAM starts and sizes somewhere...
Tomi
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DSS2 failure with current linux-omap head
I did a quick test build of the current linux-omap head and get a
failure very early on in the boot process in
drivers/video/omap2/vram.c code:
Illegal SDRAM size for VRAM
It is generated by the following code:
bdata = NODE_DATA(0)->bdata;
sdram_start = bdata->node_min_pfn << PAGE_SHIFT;
sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start;
if (paddr) {
if ((paddr & ~PAGE_MASK) || paddr < sdram_start ||
paddr + size > sdram_start + sdram_size) {
pr_err("Illegal SDRAM region for VRAM\n");
return;
}
if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) {
pr_err("FB: failed to reserve VRAM\n");
return;
}
} else {
if (size > sdram_size) {
pr_err("Illegal SDRAM size for VRAM\n");
return;
}
paddr = virt_to_phys(alloc_bootmem_pages(size));
BUG_ON(paddr & ~PAGE_MASK);
}
I modified the error pr_error to display the two values that are
compared to generate this error:
Illegal SDRAM size for VRAM: size=0xc0 sdram_size=0x0
So it appears that the method used to get the sdram size no longer
works since it returns a size of 0!
I won't be able to spend more time on this till tomorrow. Perhaps
someone else can take a look in the meantime.
Steve
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