hi all, if i'm allocating by transmit and recieve buffers, for my ethernet driver, using pci_alloc_consistent then do i need to establish bounce buffers as well in case i get a mapping in a non-DMA zone?? but in Rubini's book it's written - "Allocation is handled in this function so that the buffer will be placed in a location that works with DMA..." so then do i need to keep bounce buffers?? then it says that the allocation uses GFP_ATOMIC priority, shud'nt it use the GFP_DMA priority instead to ensure the addresses are allocated in the DMA zone?? TIA - /dev/mandeep -----Original Message----- From: Mandeep Singh Sandhu Sent: Monday, March 22, 2004 11:58 AM To: kernelnewbies@nl.linux.org Subject: PCI doubt (regarding code in pci-skeleton.c) Hi all, i was going thru the code in pci-skeleton.c and there in the open fxn. when it is allocating memory for its transmit and receive buffers it's using pci_alloc_consistent(). can ne one tell me what exactly this fxn. does and where can i find some info on what all args it accepts?? what will b the problem if i try to allocate using the std fxns like kmalloc etc.?? thanx - /dev/mandeep -----Original Message----- From: Greg KH [mailto:greg@kroah.com] Sent: Saturday, March 20, 2004 4:37 AM To: Anandraj Cc: kernelnewbies@nl.linux.org Subject: Re: PCI Slot info On Tue, Mar 09, 2004 at 09:23:43AM +0530, Anandraj wrote: > hi greg, > Then what does the slot number mean in PCI ? See include/linux/pci.h for a explaination of what PCI_SLOT() is, and how it works. thanks, greg k-h -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
