---------- Forwarded message ----------
From: william wallace <[EMAIL PROTECTED]>
Date: Jun 7, 2006 11:13 AM
Subject: Re: misc questions about the device&driver arch
To: "M. Warner Losh" <[EMAIL PROTECTED]>
Cc: [EMAIL PROTECTED], Scott Long <[EMAIL PROTECTED]>
now i amreally in trouble.the cardbus way of probing attaching
allocationg as a package deal in kernel make things more tough.
now my Broadcom BCM5721 Gigabit Ethernet says no when hot add is implemented.
dmesg the below message:
/////////////////////////////
pciehp_unconfigure_device:1357: begin to go device_get_children
bge0: <Broadcom BCM5721 Gigabit Ethernet, ASIC rev. 0x4101> at device
0.0 on pci7
bge0: RX CPU self-diagnostics failed!
bge0: chip initialization failed
device_attach: bge0 attach returned 6
//////////////////////////////
and this is printed in bge_chipinit(sc) @if_bge.c of freeBSD 53 :
\\\\\\\\\\\\\\\\\\\\\\\\
* Check the 'ROM failed' bit on the RX CPU to see if * self-tests passed.
if (CSR_READ_4(sc, BGE_RXCPU_MODE) & BGE_RXCPUMODE_ROMFAIL) {
printf("bge%d: RX CPU self-diagnostics failed!\n",
sc->bge_unit);
return(ENODEV);
\\\\\\\\\\\\\\\\\\\\\\\\\\\\
oh ,my god ,the firmware talks ! this card need firmware to be somehow
run before the device driver be attached 1
so far as I know linux do this in "/usr/lib/hotplug/firmware/"way ,but
Freebsd do not do this . what should i do :(
On 6/5/06, M. Warner Losh <[EMAIL PROTECTED]> wrote:
In message: <[EMAIL PROTECTED]>
"william wallace" <[EMAIL PROTECTED]> writes:
: sir :
: thank you for ur reminds
: now ,on DELL 2800 ,which use the intel E7520af2 mainboard ,i have
: successfully hot remove the bge G NIC card under the pci express
: port,my code is attached below .
: But still i found it hard to allocate resource when hot plug the NIC
: card and to write the code similar to cardbus_alloc_resources , which
: in my code corresponds to pcie_alloc_resources.
All of cardbus_alloc_resources has moved into the pci layer in
-current. maybe that would be a better place to start.
: i have referred to the cardbus way ,the linux way ,and the pci
: startup way .which way should i head on ,any advise to write
: pcie_alloc_resources? my current code cardHP.rar is attached ,it is a
: loadable module ,how ever ,now .
I'd imagine it would be close to working with -current :-)
Warner
: On 6/5/06, M. Warner Losh <[EMAIL PROTECTED]> wrote:
: > In message: <[EMAIL PROTECTED]>
: > "william wallace" <[EMAIL PROTECTED]> writes:
: > : now i am dealing with the pciexpress resource release and allocation
: > : i found it hard to distinguish between the bus_alloc_resource
: > : familiy(type rid and flag) and the rman_get/set_***** family(struct
: > : rman and resource ) ,i have heard that memory resource which alloc by
: > : the bus_alloc_resource should not be refer to by rid ,
: > : " SYS_RES_MEMORY
: > : Memory-access is done with the bus_space_(read,write)_(1,2,3,4)
: > : functions (depends on how many bytes you want to read/write).
: > : u_int8_t old;
: > : old = bus_space_read_1(sc->bst, sc->bsh, 0);
: > : bus_space_write_1(sc->bst, sc->bsh, 0, old); "
: > : is that true?
: >
: > bus_alloc_resources is how you get resources from your parent device.
: > It will return a struct resource * that the rman* rouintes can access
: > the insides of (let's call it r).
: > bus_space_read_1(rman_get_bustag(r), rman_get_bushandle(r), 0);
: > or the newer
: > bus_read_1(r, 0);
: >
: > : the second question ,if i do hot swap and donot release the hot remove
: > : card 's resource ,how can i attach it to the newly add-in card ?
: >
: > You must release the resource whent he card exits the system.
: >
: > : shall i do a
: > : pci_write_config(child, rle->rid, rle->start, 4);to pin the resource
: > : to the pci space ?
: >
: > No. The pci code should already handle things correctly.
: >
: > : i wonder if there 's a find document for the freebsd resource topology,
: >
: > There's not a centralized document outside of the source.
: >
: > Warner
: >
: >
: > : thank you ,sir .
: > : On 6/4/06, M. Warner Losh <[EMAIL PROTECTED]> wrote:
: > : > In message: <[EMAIL PROTECTED]>
: > : > "william wallace" <[EMAIL PROTECTED]> writes:
: > : > : On 5/20/06, Warner Losh <[EMAIL PROTECTED]> wrote:
: > : > : > From: "william wallace" <[EMAIL PROTECTED]>
: > : > : > Subject: Re: misc questions about the device&driver arch
: > : > : > Date: Sat, 20 May 2006 13:39:08 +0800
: > : > : >
: > : > : > > comparing the method array of pci_pci and cardbusbridge:
: > : > : > > what losts in pci bridge but exist in cardbusbridge:
: > : > : > > 1 card interface
: > : > : > > 2 power interface
: > : > : > > 3 some functions :
: > : > : > > 3ain bus interface
: > : > : > > (bus_driver_added, cbb_driver_added),
: > : > : > > (bus_child_detached, cbb_child_detached),
: > : > : > > (bus_child_present, cbb_child_present),
: > : > : > > 3b in device interface
: > : > : > > (device_detach, cbb_detach),
: > : > : > > what exists in pci bridge but losts in cardbusbridge:
: > : > : > > (pcib_route_interrupt, pcib_route_interrupt),
: > : > : > >
: > : > : > > not only that ,functions r very different eventhough they realize
the
: > : > : > > same interface function template
: > : > : > > wooo，so long to go to hotplug pci
: > : > : >
: > : > : > Yes. The hardest part would be to create a pci hot swap bridge
: > : > : > driver. The interface for them tend to be underdocumented.
: > : > : >
: > : > : > The bus_child_present is important for detaching.
: > : > : >
: > : > : > Also, I think that we may need to start implementing a quiess method
: > : > : > to tell the drivers they are about to be removed. For hot plug
PCI,
: > : > : > the model is that you quess the driver, the os tells you somehow it
is
: > : > : > safe, and then you remove the card. The details vary (some system
are
: > : > : > all in software, while others have a complicated interlock and
LEDs),
: > : > : > but they are similar. Cardbus is harder in some ways because cards
: > : > : > leave unannounced (in fact, there's not a good way to announce a
card
: > : > : > leaving, but there should be).
: > : > : >
: > : > : > Warner
: > : > : >
: > : > : > > On 5/20/06, Warner Losh <[EMAIL PROTECTED]> wrote:
: > : > : > >
: > : > : > > > Busses create devices to represent hardware in the system. The
bus
: > : > : > > > then causes these devices to be probed and attached. This
latter
: > : > : > > > usage is for those cases. As drivers are loaded these devices
are
: > : > : > > > offered to the new (and old) drivers in the system.
: > : > : > > >
: > : > : > > > FreeBSD inherently dynamic in its device system. The hardest
part of
: > : > : > > > adding hotplug support is programming the bridge. Adding new
devices
: > : > : > > > to the tree is easy, but knowing when to add them is hard since
you
: > : > : > > > have to write a bridge driver...
: > : > : > > >
: > : > : > > > Warner
: > : > : Prior to removing a card from the system, two things must occur:
: > : > :
: > : > : The device's driver must cease accessing the card.
: > : > :
: > : > : The card must cease generation transaction and interrupts.
: > : > :
: > : > : How this is accomplished is OS-specific, but the following must take
place:
: > : > :
: > : > : The OS must stop issuing new requests to the device's driver or must
: > : > : instruct the driver to stop accepting new requests.
: > : > :
: > : > : The driver must terminate or complete all outstanding requests.
: > : > :
: > : > : The card must be disabled from generating interrupts or transactions.
: > : > :
: > : > : When the OS commands the driver to quiesce itself and its device, the
: > : > : OS must not expect the device to remain in the system (in other words,
: > : > : it could be removed and not replaced with a similar card).
: > : > :
: > : > : How to design and implement quiescing in freebsd?
: > : >
: > : > device_quiesce? I have it in a p4 tree right now. Specifically, it
: > : > hooks up to the MOD_UNLOAD with a QUIESCE flag. The driver's
: > : > device_quiesce routine gets called, the driver sleeps there until it
: > : > knows that it is good, then returns to the caller. Then the driver's
: > : > detach routine can be called.
: > : >
: > : > Warner
: > : >
: > :
: > :
: > : --
: > : we who r about to die,salute u!
: > :
: > :
: >
:
:
: --
: we who r about to die,salute u!
--
we who r about to die,salute u!
--
we who r about to die,salute u!
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