From owner-freebsd-hackers Mon Aug 20 16:25:11 2001 Delivered-To: freebsd-hackers@freebsd.org Received: by hub.freebsd.org (Postfix, from userid 618) id 7518337B405; Mon, 20 Aug 2001 16:25:07 -0700 (PDT) Subject: Where to put new bus_dmamap_load_mbuf() code To: hackers@freebsd.org Date: Mon, 20 Aug 2001 16:25:07 -0700 (PDT) Cc: current@freebsd.org X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-Id: <20010820232507.7518337B405@hub.freebsd.org> From: wpaul@FreeBSD.ORG (Bill Paul) Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Okay, I decided today to write a bus_dmamap_load_mbuf() routine to make it a little easier to convert the PCI NIC drivers to use the busdma API. It's not the same as the NetBSD code. There are four new functions: bus_dmamap_load_mbuf() bus_dmamap_unload_mbuf() bus_dmamap_sync_mbuf() bus_dmamap_destroy_mbuf() This is more or less in keeping with the existing API, except the new routines work exclusively on mbuf lists. The thing I need to figure out now is where to put the code. The current suggestion from jhb is to create the following two new files: sys/kern/kern_busdma.c sys/sys/busdma.h The functions are machine-independent, so they shouldn't be in sys///busdma_machdep.c. I mean, they could go there, but that would just result in code duplication. If somebody has a better suggestion, now's the time to speak up. Please let's avoid creating another bikeshed over this. Current code snapshot resides at: http://www.freebsd.org/~wpaul/busdma There's also a modified version if the Adaptec "starfire" driver there which uses the new routines. I'm running this version of the driver on a test box in the lab right now. -Bill -- ============================================================================= -Bill Paul (510) 749-2329 | Senior Engineer, Master of Unix-Fu wpaul@windriver.com | Wind River Systems ============================================================================= "I like zees guys. Zey are fonny guys. Just keel one of zem." -- The 3 Amigos ============================================================================= To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message