* Re: [PATCH v3 1/2] net: core: Notify on changes to dev->promiscuity.
From: Jiri Pirko @ 2019-08-29 13:49 UTC (permalink / raw)
To: Andrew Lunn
Cc: Horatiu Vultur, alexandre.belloni, UNGLinuxDriver, davem,
allan.nielsen, ivecera, f.fainelli, netdev, linux-kernel
In-Reply-To: <20190829132611.GC6998@lunn.ch>
Thu, Aug 29, 2019 at 03:26:11PM CEST, andrew@lunn.ch wrote:
>> NACK
>>
>> This is invalid usecase for switchdev infra. Switchdev is there for
>> bridge offload purposes only.
>
>Hi Jiri
>
>I would argue this is for bridge offload. In another email, you say
>promisc is promisc. Does that mean the Mellonox hardware forwards
>every frame ingressing a port to the CPU by default as soon as it is
>enslaved to a bridge and promisc mode turned on? Or course not. At the
>moment, every switchdev driver wrongly implement promisc mode.
>
>This patchset is about correctly implementing promisc mode, so that
>applications can use it as expected. And that means configuring the
>hardware bridge to also forward a copy of frames to the CPU.
Wait, I believe there has been some misundestanding. Promisc mode is NOT
about getting packets to the cpu. It's about setting hw filters in a way
that no rx packet is dropped. For normal nics it means that all packets
get to the cpu, but that is just because it is the only direction they
can make.
If you want to get packets from the hw forwarding dataplane to cpu, you
should not use promisc mode for that. That would be incorrect.
If you want to get packets from the hw forwarding dataplane to cpu, you
should use tc trap action. It is there exactly for this purpose.
Promisc is for setting rx filters.
>
>I see trap as a different use case. tcpdump/pcap is not going to use
>traps.
>
> Andrew
^ permalink raw reply
* Re: [PATCH net] netdevsim: Restore per-network namespace accounting for fib entries
From: Jiri Pirko @ 2019-08-29 14:02 UTC (permalink / raw)
To: David Ahern; +Cc: David Ahern, davem, netdev
In-Reply-To: <87432763-769b-be25-6e5c-a15f8ebfd654@gmail.com>
Thu, Aug 29, 2019 at 02:54:39PM CEST, dsahern@gmail.com wrote:
>On 8/29/19 12:28 AM, Jiri Pirko wrote:
>> Wed, Aug 28, 2019 at 11:26:03PM CEST, dsahern@gmail.com wrote:
>>> On 8/28/19 4:37 AM, Jiri Pirko wrote:
>>>> Tue, Aug 06, 2019 at 09:15:17PM CEST, dsahern@kernel.org wrote:
>>>>> From: David Ahern <dsahern@gmail.com>
>>>>>
>>>>> Prior to the commit in the fixes tag, the resource controller in netdevsim
>>>>> tracked fib entries and rules per network namespace. Restore that behavior.
>>>>
>>>> David, please help me understand. If the counters are per-device, not
>>>> per-netns, they are both the same. If we have device (devlink instance)
>>>> is in a netns and take only things happening in this netns into account,
>>>> it should count exactly the same amount of fib entries, doesn't it?
>>>
>>> if you are only changing where the counters are stored - net_generic vs
>>> devlink private - then yes, they should be equivalent.
>>
>> Okay.
>>
>>>
>>>>
>>>> I re-thinked the devlink netns patchset and currently I'm going in
>>>> slightly different direction. I'm having netns as an attribute of
>>>> devlink reload. So all the port netdevices and everything gets
>>>> re-instantiated into new netns. Works fine with mlxsw. There we also
>>>> re-register the fib notifier.
>>>>
>>>> I think that this can work for your usecase in netdevsim too:
>>>> 1) devlink instance is registering a fib notifier to track all fib
>>>> entries in a namespace it belongs to. The counters are per-device -
>>>> counting fib entries in a namespace the device is in.
>>>> 2) another devlink instance can do the same tracking in the same
>>>> namespace. No problem, it's a separate counter, but the numbers are
>>>> the same. One can set different limits to different devlink
>>>> instances, but you can have only one. That is the bahaviour you have
>>>> now.
>>>> 3) on devlink reload, netdevsim re-instantiates ports and re-registers
>>>> fib notifier
>>>> 4) on devlink reload with netns change, all should be fine as the
>>>> re-registered fib nofitier replays the entries. The ports are
>>>> re-instatiated in new netns.
>>>>
>>>> This way, we would get consistent behaviour between netdevsim and real
>>>> devices (mlxsw), correct devlink-netns implementation (you also
>>>> suggested to move ports to the namespace). Everyone should be happy.
>>>>
>>>> What do you think?
>>>>
>>>
>>> Right now, registering the fib notifier walks all namespaces. That is
>>> not a scalable solution. Are you changing that to replay only a given
>>> netns? Are you changing the notifiers to be per-namespace?
>>
>> Eventually, that seems like good idea. Currently I want to do
>> if (net==nsim_dev->mynet)
>> done
>> check at the beginning of the notifier.
>>
>
>The per-namespace replay should be done as part of this re-work. It
>should not be that big of a change. Add 'struct net' arg to
>register_fib_notifier. If set, call fib_net_dump only for that
>namespace. The seq check should be made per-namespace.
>
>You mentioned mlxsw works fine with moving ports to a new network
>namespace, so that will be a 'real' example with a known scalability
>problem that should be addressed now.
Fair enough. Will include this now.
Thanks!
^ permalink raw reply
* [PATCH net-next] tcp_bbr: clarify that bbr_bdp() rounds up in comments
From: Luke Hsiao @ 2019-08-29 14:02 UTC (permalink / raw)
To: David Miller
Cc: netdev, Luke Hsiao, Soheil Hassas Yeganeh, Neal Cardwell,
Priyaranjan Jha
From: Luke Hsiao <lukehsiao@google.com>
This explicitly clarifies that bbr_bdp() returns the rounded-up value of
the bandwidth-delay product and why in the comments.
Signed-off-by: Luke Hsiao <lukehsiao@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Priyaranjan Jha <priyarjha@google.com>
---
net/ipv4/tcp_bbr.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/ipv4/tcp_bbr.c b/net/ipv4/tcp_bbr.c
index 56be7d27f208..95b59540eee1 100644
--- a/net/ipv4/tcp_bbr.c
+++ b/net/ipv4/tcp_bbr.c
@@ -346,7 +346,7 @@ static void bbr_cwnd_event(struct sock *sk, enum tcp_ca_event event)
/* Calculate bdp based on min RTT and the estimated bottleneck bandwidth:
*
- * bdp = bw * min_rtt * gain
+ * bdp = ceil(bw * min_rtt * gain)
*
* The key factor, gain, controls the amount of queue. While a small gain
* builds a smaller queue, it becomes more vulnerable to noise in RTT
@@ -370,7 +370,9 @@ static u32 bbr_bdp(struct sock *sk, u32 bw, int gain)
w = (u64)bw * bbr->min_rtt_us;
- /* Apply a gain to the given value, then remove the BW_SCALE shift. */
+ /* Apply a gain to the given value, remove the BW_SCALE shift, and
+ * round the value up to avoid a negative feedback loop.
+ */
bdp = (((w * gain) >> BBR_SCALE) + BW_UNIT - 1) / BW_UNIT;
return bdp;
--
2.23.0.187.g17f5b7556c-goog
^ permalink raw reply related
* Re: [PATCH v2 net-next 2/2] net: dsa: tag_8021q: Restore bridge VLANs when enabling vlan_filtering
From: Vivien Didelot @ 2019-08-29 14:02 UTC (permalink / raw)
To: Vladimir Oltean
Cc: Florian Fainelli, Andrew Lunn, Ido Schimmel, Roopa Prabhu,
nikolay, David S. Miller, netdev
In-Reply-To: <CA+h21hq=VVw0p0OjGaPx2-c4FE1ge-STRVHYZ6P62c-+_xW0nw@mail.gmail.com>
Hi Vladimir,
On Thu, 29 Aug 2019 14:50:14 +0300, Vladimir Oltean <olteanv@gmail.com> wrote:
> > +static int dsa_8021q_restore_pvid(struct dsa_switch *ds, int port)
> > +{
> > + struct bridge_vlan_info vinfo;
> > + struct net_device *slave;
> > + u16 pvid;
> > + int err;
> > +
> > + if (!dsa_is_user_port(ds, port))
> > + return 0;
> > +
> > + slave = ds->ports[port].slave;
> > +
> > + err = br_vlan_get_pvid(slave, &pvid);
> > + if (err < 0) {
> > + dev_err(ds->dev, "Couldn't determine bridge PVID\n");
> > + return err;
> > + }
> > +
> > + err = br_vlan_get_info(slave, pvid, &vinfo);
> > + if (err < 0) {
> > + dev_err(ds->dev, "Couldn't determine PVID attributes\n");
> > + return err;
> > + }
> > +
> > + return dsa_port_vid_add(&ds->ports[port], pvid, vinfo.flags);
>
> If the bridge had installed a dsa_8021q VLAN here, I need to use the
> dsa_slave_vid_add logic to restore it. The dsa_8021q flags on the CPU
> port are "ingress tagged", but that may not be the case for the bridge
> VLAN.
> Should I expose dsa_slave_vlan_add in dsa_priv.h, or should I just
> open-code another dsa_port_vid_add for dp->cpu_dp, duplicating a bit
> of code from dsa_slave_vlan_add?
dsa_slave_* functions are the entry points for operations performed on the
net_device structures exposed to userspace. Using them elsewhere seems wrong.
dsa_port_* functions scope any dsa_port structure regardless its type though,
so I'd suggest duplicating a bit of code in tag_8021q.c to implement this
specific use case, until we figure out something nice to factorize.
Thank you,
Vivien
^ permalink raw reply
* [PATCH] net: dsa: microchip: fill regmap_config name
From: George McCollister @ 2019-08-29 14:14 UTC (permalink / raw)
To: netdev
Cc: Woojung Huh, Andrew Lunn, Florian Fainelli, Tristram Ha,
Marek Vasut, linux-kernel, George McCollister
Use the register value width as the regmap_config name to prevent the
following error when the second and third regmap_configs are
initialized.
"debugfs: Directory '${bus-id}' with parent 'regmap' already present!"
Signed-off-by: George McCollister <george.mccollister@gmail.com>
---
drivers/net/dsa/microchip/ksz_common.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index ee7096d8af07..72ec250b9540 100644
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -128,6 +128,7 @@ static inline void ksz_pwrite32(struct ksz_device *dev, int port, int offset,
#define KSZ_REGMAP_ENTRY(width, swp, regbits, regpad, regalign) \
{ \
+ .name = #width, \
.val_bits = (width), \
.reg_stride = (width) / 8, \
.reg_bits = (regbits) + (regalign), \
--
2.11.0
^ permalink raw reply related
* Re: [PATCH v3 1/2] net: core: Notify on changes to dev->promiscuity.
From: Andrew Lunn @ 2019-08-29 14:37 UTC (permalink / raw)
To: Jiri Pirko
Cc: Horatiu Vultur, alexandre.belloni, UNGLinuxDriver, davem,
allan.nielsen, ivecera, f.fainelli, netdev, linux-kernel
In-Reply-To: <20190829134901.GJ2312@nanopsycho>
> Wait, I believe there has been some misundestanding. Promisc mode is NOT
> about getting packets to the cpu. It's about setting hw filters in a way
> that no rx packet is dropped.
>
> If you want to get packets from the hw forwarding dataplane to cpu, you
> should not use promisc mode for that. That would be incorrect.
Hi Jiri
I'm not sure a wireshark/tcpdump/pcap user would agree with you. They
want to see packets on an interface, so they use these tools. The fact
that the interface is a switch interface should not matter. The
switchdev model is that we try to hide away the interface happens to
be on a switch, you can just use it as normal. So why should promisc
mode not work as normal?
> If you want to get packets from the hw forwarding dataplane to cpu, you
> should use tc trap action. It is there exactly for this purpose.
Do you really think a wireshark/tcpdump/pcap user should need to use
tc trap for the special case the interface is a switch port? Doesn't that
break the switchdev model?
tc trap is more about fine grained selection of packets. Also, it
seems like trapped packets are not forwarded, which is not what you
would expect from wireshark/tcpdump/pcap.
Andrew
^ permalink raw reply
* pull-request: mac80211 2019-08-29
From: Johannes Berg @ 2019-08-29 15:00 UTC (permalink / raw)
To: David Miller; +Cc: netdev, linux-wireless
Hi Dave,
We have just three more fixes now, and one of those is a driver fix
because Kalle is on vacation and I'm covering for him in the meantime.
Please pull and let me know if there's any problem.
Thanks,
johannes
The following changes since commit 189308d5823a089b56e2299cd96589507dac7319:
sky2: Disable MSI on yet another ASUS boards (P6Xxxx) (2019-08-28 16:09:02 -0700)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git tags/mac80211-for-davem-2019-08-29
for you to fetch changes up to f8b43c5cf4b62a19f2210a0f5367b84e1eff1ab9:
mac80211: Correctly set noencrypt for PAE frames (2019-08-29 16:40:00 +0200)
----------------------------------------------------------------
We have
* one fix for a driver as I'm covering for Kalle while he's on vacation
* two fixes for eapol-over-nl80211 work
----------------------------------------------------------------
Denis Kenzior (2):
mac80211: Don't memset RXCB prior to PAE intercept
mac80211: Correctly set noencrypt for PAE frames
Luca Coelho (1):
iwlwifi: pcie: handle switching killer Qu B0 NICs to C0
drivers/net/wireless/intel/iwlwifi/cfg/22000.c | 24 ++++++++++++++++++++++++
drivers/net/wireless/intel/iwlwifi/iwl-config.h | 2 ++
drivers/net/wireless/intel/iwlwifi/pcie/drv.c | 4 ++++
drivers/net/wireless/intel/iwlwifi/pcie/trans.c | 7 +------
net/mac80211/rx.c | 6 +++---
5 files changed, 34 insertions(+), 9 deletions(-)
^ permalink raw reply
* Re: memory leak in ppp_write
From: syzbot @ 2019-08-29 15:32 UTC (permalink / raw)
To: ast, bpf, daniel, davem, kafai, linux-kernel, linux-ppp, netdev,
paulus, songliubraving, syzkaller-bugs, yhs
In-Reply-To: <000000000000edc1d5058f5dfa5f@google.com>
syzbot has found a reproducer for the following crash on:
HEAD commit: 6525771f Merge tag 'arc-5.3-rc7' of git://git.kernel.org/p..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16dc12a2600000
kernel config: https://syzkaller.appspot.com/x/.config?x=e6131eafb9408877
dashboard link: https://syzkaller.appspot.com/bug?extid=d9c8bf24e56416d7ce2c
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116942de600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1179c582600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+d9c8bf24e56416d7ce2c@syzkaller.appspotmail.com
executing program
executing program
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88812a17bc00 (size 224):
comm "syz-executor673", pid 6952, jiffies 4294942888 (age 13.040s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000d110fff9>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000d110fff9>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000d110fff9>] slab_alloc_node mm/slab.c:3262 [inline]
[<00000000d110fff9>] kmem_cache_alloc_node+0x163/0x2f0 mm/slab.c:3574
[<000000002d616113>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:197
[<000000000167fc45>] alloc_skb include/linux/skbuff.h:1055 [inline]
[<000000000167fc45>] ppp_write+0x48/0x120
drivers/net/ppp/ppp_generic.c:502
[<000000009ab42c0b>] __vfs_write+0x43/0xa0 fs/read_write.c:494
[<00000000086b2e22>] vfs_write fs/read_write.c:558 [inline]
[<00000000086b2e22>] vfs_write+0xee/0x210 fs/read_write.c:542
[<00000000a2b70ef9>] ksys_write+0x7c/0x130 fs/read_write.c:611
[<00000000ce5e0fdd>] __do_sys_write fs/read_write.c:623 [inline]
[<00000000ce5e0fdd>] __se_sys_write fs/read_write.c:620 [inline]
[<00000000ce5e0fdd>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620
[<00000000d9d7b370>] do_syscall_64+0x76/0x1a0
arch/x86/entry/common.c:296
[<0000000006e6d506>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff888121203900 (size 224):
comm "syz-executor673", pid 6965, jiffies 4294943430 (age 7.620s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000d110fff9>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000d110fff9>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000d110fff9>] slab_alloc_node mm/slab.c:3262 [inline]
[<00000000d110fff9>] kmem_cache_alloc_node+0x163/0x2f0 mm/slab.c:3574
[<000000002d616113>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:197
[<000000000167fc45>] alloc_skb include/linux/skbuff.h:1055 [inline]
[<000000000167fc45>] ppp_write+0x48/0x120
drivers/net/ppp/ppp_generic.c:502
[<000000009ab42c0b>] __vfs_write+0x43/0xa0 fs/read_write.c:494
[<00000000086b2e22>] vfs_write fs/read_write.c:558 [inline]
[<00000000086b2e22>] vfs_write+0xee/0x210 fs/read_write.c:542
[<00000000a2b70ef9>] ksys_write+0x7c/0x130 fs/read_write.c:611
[<00000000ce5e0fdd>] __do_sys_write fs/read_write.c:623 [inline]
[<00000000ce5e0fdd>] __se_sys_write fs/read_write.c:620 [inline]
[<00000000ce5e0fdd>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620
[<00000000d9d7b370>] do_syscall_64+0x76/0x1a0
arch/x86/entry/common.c:296
[<0000000006e6d506>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
BUG: memory leak
unreferenced object 0xffff88811d0cf800 (size 512):
comm "syz-executor673", pid 6965, jiffies 4294943430 (age 7.620s)
hex dump (first 32 bytes):
06 00 00 00 05 00 00 00 40 00 00 00 00 00 00 00 ........@.......
40 00 40 00 00 00 00 00 40 00 40 00 00 00 00 00 @.@.....@.@.....
backtrace:
[<00000000b9629d4c>] kmemleak_alloc_recursive
include/linux/kmemleak.h:43 [inline]
[<00000000b9629d4c>] slab_post_alloc_hook mm/slab.h:522 [inline]
[<00000000b9629d4c>] slab_alloc_node mm/slab.c:3262 [inline]
[<00000000b9629d4c>] kmem_cache_alloc_node_trace+0x161/0x2f0
mm/slab.c:3592
[<00000000a9b92035>] __do_kmalloc_node mm/slab.c:3614 [inline]
[<00000000a9b92035>] __kmalloc_node_track_caller+0x38/0x50
mm/slab.c:3629
[<00000000fad050db>] __kmalloc_reserve.isra.0+0x40/0xb0
net/core/skbuff.c:141
[<00000000a1025904>] __alloc_skb+0xa0/0x210 net/core/skbuff.c:209
[<000000000167fc45>] alloc_skb include/linux/skbuff.h:1055 [inline]
[<000000000167fc45>] ppp_write+0x48/0x120
drivers/net/ppp/ppp_generic.c:502
[<000000009ab42c0b>] __vfs_write+0x43/0xa0 fs/read_write.c:494
[<00000000086b2e22>] vfs_write fs/read_write.c:558 [inline]
[<00000000086b2e22>] vfs_write+0xee/0x210 fs/read_write.c:542
[<00000000a2b70ef9>] ksys_write+0x7c/0x130 fs/read_write.c:611
[<00000000ce5e0fdd>] __do_sys_write fs/read_write.c:623 [inline]
[<00000000ce5e0fdd>] __se_sys_write fs/read_write.c:620 [inline]
[<00000000ce5e0fdd>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620
[<00000000d9d7b370>] do_syscall_64+0x76/0x1a0
arch/x86/entry/common.c:296
[<0000000006e6d506>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
^ permalink raw reply
* Re: [PATCH v2 bpf-next 2/3] bpf: implement CAP_BPF
From: Daniel Borkmann @ 2019-08-29 15:32 UTC (permalink / raw)
To: Alexei Starovoitov, luto
Cc: davem, peterz, rostedt, netdev, bpf, kernel-team, linux-api
In-Reply-To: <20190829051253.1927291-2-ast@kernel.org>
On 8/29/19 7:12 AM, Alexei Starovoitov wrote:
> Implement permissions as stated in uapi/linux/capability.h
>
> Note that CAP_SYS_ADMIN is replaced with CAP_BPF.
> All existing applications that use BPF do not drop all caps
> and keep only CAP_SYS_ADMIN before doing bpf() syscall.
> Hence it's highly unlikely that existing code will break.
> If there will be reports of breakage then CAP_SYS_ADMIN
> would be allowed as well with "it's usage is deprecated" message
> similar to commit ee24aebffb75 ("cap_syslog: accept CAP_SYS_ADMIN for now")
>
> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
[...]
> diff --git a/kernel/bpf/hashtab.c b/kernel/bpf/hashtab.c
> index 22066a62c8c9..f459315625ac 100644
> --- a/kernel/bpf/hashtab.c
> +++ b/kernel/bpf/hashtab.c
> @@ -244,9 +244,9 @@ static int htab_map_alloc_check(union bpf_attr *attr)
> BUILD_BUG_ON(offsetof(struct htab_elem, fnode.next) !=
> offsetof(struct htab_elem, hash_node.pprev));
>
> - if (lru && !capable(CAP_SYS_ADMIN))
> + if (lru && !capable(CAP_BPF))
> /* LRU implementation is much complicated than other
> - * maps. Hence, limit to CAP_SYS_ADMIN for now.
> + * maps. Hence, limit to CAP_BPF.
> */
> return -EPERM;
>
I don't think this works, this is pretty much going to break use cases where
orchestration daemons are deployed as containers that are explicitly granted
specified cap set and right now this is CAP_SYS_ADMIN and not CAP_BPF for bpf().
The former needs to be a superset of the latter in order for this to work and
not break compatibility between kernel upgrades.
- https://kubernetes.io/docs/tasks/configure-pod-container/security-context/#set-capabilities-for-a-container
- https://docs.docker.com/engine/reference/run/#runtime-privilege-and-linux-capabilities
Thanks,
Daniel
^ permalink raw reply
* Re: [PATCH bpf-next] bpf, capabilities: introduce CAP_BPF
From: Andy Lutomirski @ 2019-08-29 15:43 UTC (permalink / raw)
To: Steven Rostedt
Cc: Alexei Starovoitov, Peter Zijlstra, Andy Lutomirski,
Alexei Starovoitov, Kees Cook, LSM List, James Morris, Jann Horn,
Masami Hiramatsu, David S. Miller, Daniel Borkmann,
Network Development, bpf, kernel-team, Linux API
In-Reply-To: <20190829093434.36540972@gandalf.local.home>
On Thu, Aug 29, 2019 at 6:34 AM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> On Wed, 28 Aug 2019 15:08:28 -0700
> Alexei Starovoitov <alexei.starovoitov@gmail.com> wrote:
>
> > On Wed, Aug 28, 2019 at 09:14:21AM +0200, Peter Zijlstra wrote:
> > > On Tue, Aug 27, 2019 at 04:01:08PM -0700, Andy Lutomirski wrote:
> > >
> > > > > Tracing:
> > > > >
> > > > > CAP_BPF and perf_paranoid_tracepoint_raw() (which is kernel.perf_event_paranoid == -1)
> > > > > are necessary to:
> > >
> > > That's not tracing, that's perf.
> > >
>
> > re: your first comment above.
> > I'm not sure what difference you see in words 'tracing' and 'perf'.
> > I really hope we don't partition the overall tracing category
> > into CAP_PERF and CAP_FTRACE only because these pieces are maintained
> > by different people.
>
> I think Peter meant: It's not tracing, it's profiling.
>
> And there is a bit of separation between the two, although there is an
> overlap.
>
> Yes, perf can do tracing but it's designed more for profiling.
As I see it, there are a couple of reasons to split something into
multiple capabilities. If they allow users to do well-defined things
that have materially different risks from the perspective of the
person granting the capabilities, then they can usefully be different.
Similarly, if one carries a risk of accidental use that another does
not, they should usefully be different. An example of the first is
that CAP_NET_BIND_SERVICE has very different powers from
CAP_NET_ADMIN, whereas CAP_SYS_ADMIN and CAP_PTRACE are really quite
similar from a security perspective. An example of the latter is that
CAP_DAC_OVERRIDE changes overall open() semantics and CAP_SYS_ADMIN
does not, at least not outside of /proc.
Things having different development histories and different
maintainers doesn't seem like a good reason to split the capabilities
IMO.
>
> > On one side perf_event_open() isn't really doing tracing (as step by
> > step ftracing of function sequences), but perf_event_open() opens
> > an event and the sequence of events (may include IP) becomes a trace.
> > imo CAP_TRACING is the best name to descibe the privileged space
> > of operations possible via perf_event_open, ftrace, kprobe, stack traces, etc.
>
> I have no issue with what you suggest. I guess it comes down to how
> fine grain people want to go. Do we want it to be all or nothing?
> Should CAP_TRACING allow for write access to tracefs? Or should we go
> with needing both CAP_TRACING and permissions in that directory
> (like changing the group ownership of the files at every boot).
>
> Perhaps we should have a CAP_TRACING_RO, that gives read access to
> tracefs (and write if the users have permissions). And have CAP_TRACING
> to allow full write access as well (allowing for users to add kprobe
> events and enabling tracers like the function tracer).
I can imagine splitting it into three capabilities:
CAP_TRACE_KERNEL: learn which kernel functions are called when. This
would allow perf profiling, for example, but not sampling of kernel
regs.
CAP_TRACE_READ_KERNEL_DATA: allow the tracing, profiling, etc features
that can read the kernel's data. So you get function arguments via
kprobe, kernel regs, and APIs that expose probe_kernel_read()
CAP_TRACE_USER: trace unrelated user processes
I'm not sure the code is written in a way that makes splitting
CAP_TRACE_KERNEL and CAP_TRACE_READ_KERNEL_DATA, and I'm not sure that
CAP_TRACE_KERNEL is all that useful except for plain perf record
without CAP_TRACE_READ_KERNEL_DATA. What do you all think? I suppose
it could also be:
CAP_PROFILE_KERNEL: Use perf with events that aren't kprobes or
tracepoints. Does not grant the ability to sample regs or the kernel
stack directly.
CAP_TRACE_KERNEL: Use all of perf, ftrace, kprobe, etc.
CAP_TRACE_USER: Use all of perf with scope limited to user mode and uprobes.
> As the above seems to favor the idea of CAP_TRACING allowing write
> access to tracefs, should we have a CAP_TRACING_RO for just read access
> and limited perf abilities?
How about making a separate cap for limited perf capabilities along
the lines of the above?
For what it's worth, it should be straightforward using full tracing
to read out the kernel's random number pool, for example, but it would
be difficult or impossible to do that using just perf record -e
cycles.
^ permalink raw reply
* Re: [PATCH v2 bpf-next 1/3] capability: introduce CAP_BPF and CAP_TRACING
From: Daniel Borkmann @ 2019-08-29 15:47 UTC (permalink / raw)
To: Alexei Starovoitov, luto
Cc: davem, peterz, rostedt, netdev, bpf, kernel-team, linux-api
In-Reply-To: <20190829051253.1927291-1-ast@kernel.org>
On 8/29/19 7:12 AM, Alexei Starovoitov wrote:
[...]
>
> +/*
> + * CAP_BPF allows the following BPF operations:
> + * - Loading all types of BPF programs
> + * - Creating all types of BPF maps except:
> + * - stackmap that needs CAP_TRACING
> + * - devmap that needs CAP_NET_ADMIN
> + * - cpumap that needs CAP_SYS_ADMIN
> + * - Advanced verifier features
> + * - Indirect variable access
> + * - Bounded loops
> + * - BPF to BPF function calls
> + * - Scalar precision tracking
> + * - Larger complexity limits
> + * - Dead code elimination
> + * - And potentially other features
> + * - Use of pointer-to-integer conversions in BPF programs
> + * - Bypassing of speculation attack hardening measures
> + * - Loading BPF Type Format (BTF) data
> + * - Iterate system wide loaded programs, maps, BTF objects
> + * - Retrieve xlated and JITed code of BPF programs
> + * - Access maps and programs via id
> + * - Use bpf_spin_lock() helper
This is still very wide. Consider following example: app has CAP_BPF +
CAP_NET_ADMIN. Why can't we in this case *only* allow loading networking
related [plus generic] maps and programs? If it doesn't have CAP_TRACING,
what would be a reason to allow loading it? Same vice versa. There are
some misc program types like the infraread stuff, but they could continue
to live under [CAP_BPF +] CAP_SYS_ADMIN as fallback. I think categorizing
a specific list of prog and map types might be more clear than disallowing
some helpers like below (e.g. why choice of bpf_probe_read() but not
bpf_probe_write_user() etc).
> + * CAP_BPF and CAP_TRACING together allow the following:
> + * - bpf_probe_read to read arbitrary kernel memory
> + * - bpf_trace_printk to print data to ftrace ring buffer
> + * - Attach to raw_tracepoint
> + * - Query association between kprobe/tracepoint and bpf program
> + *
> + * CAP_BPF and CAP_NET_ADMIN together allow the following:
> + * - Attach to cgroup-bpf hooks and query
> + * - skb, xdp, flow_dissector test_run command
> + *
> + * CAP_NET_ADMIN allows:
> + * - Attach networking bpf programs to xdp, tc, lwt, flow dissector
> + */
> +#define CAP_BPF 38
> +
> +/*
> + * CAP_TRACING allows:
> + * - Full use of perf_event_open(), similarly to the effect of
> + * kernel.perf_event_paranoid == -1
> + * - Full use of tracefs
> + * - Creation of [ku][ret]probe
> + * - Accessing arbitrary kernel memory via kprobe + probe_kernel_read
> + * - Attach tracing bpf programs to perf events
> + * - Access to kallsyms
> + */
> +#define CAP_TRACING 39
>
> -#define CAP_LAST_CAP CAP_AUDIT_READ
> +#define CAP_LAST_CAP CAP_TRACING
>
> #define cap_valid(x) ((x) >= 0 && (x) <= CAP_LAST_CAP)
>
> diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h
> index 201f7e588a29..0b364e245163 100644
> --- a/security/selinux/include/classmap.h
> +++ b/security/selinux/include/classmap.h
> @@ -26,9 +26,9 @@
> "audit_control", "setfcap"
>
> #define COMMON_CAP2_PERMS "mac_override", "mac_admin", "syslog", \
> - "wake_alarm", "block_suspend", "audit_read"
> + "wake_alarm", "block_suspend", "audit_read", "bpf", "tracing"
>
> -#if CAP_LAST_CAP > CAP_AUDIT_READ
> +#if CAP_LAST_CAP > CAP_TRACING
> #error New capability defined, please update COMMON_CAP2_PERMS.
> #endif
>
>
^ permalink raw reply
* [PATCH v2 net-next 00/15] ioc3-eth improvements
From: Thomas Bogendoerfer @ 2019-08-29 15:49 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In my patch series for splitting out the serial code from ioc3-eth
by using a MFD device there was one big patch for ioc3-eth.c,
which wasn't really usefull for reviews. This series contains the
ioc3-eth changes splitted in smaller steps and few more cleanups.
Only the conversion to MFD will be done later in a different series.
Changes in v2:
- use net_err_ratelimited for printing various ioc3 errors
- added missing clearing of rx buf valid flags into ioc3_alloc_rings
- use __func__ for printing out of memory messages
Thomas Bogendoerfer (15):
MIPS: SGI-IP27: remove ioc3 ethernet init
MIPS: SGI-IP27: restructure ioc3 register access
net: sgi: ioc3-eth: remove checkpatch errors/warning
net: sgi: ioc3-eth: use defines for constants dealing with desc rings
net: sgi: ioc3-eth: allocate space for desc rings only once
net: sgi: ioc3-eth: get rid of ioc3_clean_rx_ring()
net: sgi: ioc3-eth: separate tx and rx ring handling
net: sgi: ioc3-eth: introduce chip start function
net: sgi: ioc3-eth: split ring cleaning/freeing and allocation
net: sgi: ioc3-eth: refactor rx buffer allocation
net: sgi: ioc3-eth: use dma-direct for dma allocations
net: sgi: ioc3-eth: use csum_fold
net: sgi: ioc3-eth: Fix IPG settings
net: sgi: ioc3-eth: protect emcr in all cases
net: sgi: ioc3-eth: no need to stop queue set_multicast_list
arch/mips/include/asm/sn/ioc3.h | 357 +++++-------
arch/mips/sgi-ip27/ip27-console.c | 5 +-
arch/mips/sgi-ip27/ip27-init.c | 13 -
drivers/net/ethernet/sgi/ioc3-eth.c | 1039 ++++++++++++++++++-----------------
4 files changed, 667 insertions(+), 747 deletions(-)
--
2.13.7
^ permalink raw reply
* [PATCH v2 net-next 01/15] MIPS: SGI-IP27: remove ioc3 ethernet init
From: Thomas Bogendoerfer @ 2019-08-29 15:49 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Removed not needed disabling of ethernet interrupts in IP27 platform code.
Acked-by: Paul Burton <paul.burton@mips.com>
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
arch/mips/sgi-ip27/ip27-init.c | 13 -------------
1 file changed, 13 deletions(-)
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 066b33f50bcc..59d5375c9021 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -130,17 +130,6 @@ cnodeid_t get_compact_nodeid(void)
return NASID_TO_COMPACT_NODEID(get_nasid());
}
-static inline void ioc3_eth_init(void)
-{
- struct ioc3 *ioc3;
- nasid_t nid;
-
- nid = get_nasid();
- ioc3 = (struct ioc3 *) KL_CONFIG_CH_CONS_INFO(nid)->memory_base;
-
- ioc3->eier = 0;
-}
-
extern void ip27_reboot_setup(void);
void __init plat_mem_setup(void)
@@ -182,8 +171,6 @@ void __init plat_mem_setup(void)
panic("Kernel compiled for N mode.");
#endif
- ioc3_eth_init();
-
ioport_resource.start = 0;
ioport_resource.end = ~0UL;
set_io_port_base(IO_BASE);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 15/15] net: sgi: ioc3-eth: no need to stop queue set_multicast_list
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
netif_stop_queue()/netif_wake_qeue() aren't needed for changing
multicast filters.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d2b6659adba6..3f6dffd0351e 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1630,8 +1630,6 @@ static void ioc3_set_multicast_list(struct net_device *dev)
struct netdev_hw_addr *ha;
u64 ehar = 0;
- netif_stop_queue(dev); /* Lock out others. */
-
spin_lock_irq(&ip->ioc3_lock);
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
@@ -1663,8 +1661,6 @@ static void ioc3_set_multicast_list(struct net_device *dev)
}
spin_unlock_irq(&ip->ioc3_lock);
-
- netif_wake_queue(dev); /* Let us get going again. */
}
module_pci_driver(ioc3_driver);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 05/15] net: sgi: ioc3-eth: allocate space for desc rings only once
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Memory for descriptor rings are allocated/freed, when interface is
brought up/down. Since the size of the rings is not changeable by
hardware, we now allocate rings now during probe and free it, when
device is removed.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 103 ++++++++++++++++++------------------
1 file changed, 51 insertions(+), 52 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index ba18a53fbbe6..d9d94a55ac34 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -803,25 +803,17 @@ static void ioc3_free_rings(struct ioc3_private *ip)
struct sk_buff *skb;
int rx_entry, n_entry;
- if (ip->txr) {
- ioc3_clean_tx_ring(ip);
- free_pages((unsigned long)ip->txr, 2);
- ip->txr = NULL;
- }
+ ioc3_clean_tx_ring(ip);
- if (ip->rxr) {
- n_entry = ip->rx_ci;
- rx_entry = ip->rx_pi;
+ n_entry = ip->rx_ci;
+ rx_entry = ip->rx_pi;
- while (n_entry != rx_entry) {
- skb = ip->rx_skbs[n_entry];
- if (skb)
- dev_kfree_skb_any(skb);
+ while (n_entry != rx_entry) {
+ skb = ip->rx_skbs[n_entry];
+ if (skb)
+ dev_kfree_skb_any(skb);
- n_entry = (n_entry + 1) & RX_RING_MASK;
- }
- free_page((unsigned long)ip->rxr);
- ip->rxr = NULL;
+ n_entry = (n_entry + 1) & RX_RING_MASK;
}
}
@@ -829,49 +821,34 @@ static void ioc3_alloc_rings(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
struct ioc3_erxbuf *rxb;
- unsigned long *rxr;
int i;
- if (!ip->rxr) {
- /* Allocate and initialize rx ring. 4kb = 512 entries */
- ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
- rxr = ip->rxr;
- if (!rxr)
- pr_err("%s: get_zeroed_page() failed!\n", __func__);
-
- /* Now the rx buffers. The RX ring may be larger but
- * we only allocate 16 buffers for now. Need to tune
- * this for performance and memory later.
- */
- for (i = 0; i < RX_BUFFS; i++) {
- struct sk_buff *skb;
+ /* Now the rx buffers. The RX ring may be larger but
+ * we only allocate 16 buffers for now. Need to tune
+ * this for performance and memory later.
+ */
+ for (i = 0; i < RX_BUFFS; i++) {
+ struct sk_buff *skb;
- skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if (!skb) {
- show_free_areas(0, NULL);
- continue;
- }
+ skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
+ if (!skb) {
+ show_free_areas(0, NULL);
+ continue;
+ }
- ip->rx_skbs[i] = skb;
+ ip->rx_skbs[i] = skb;
- /* Because we reserve afterwards. */
- skb_put(skb, (1664 + RX_OFFSET));
- rxb = (struct ioc3_erxbuf *)skb->data;
- rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
- skb_reserve(skb, RX_OFFSET);
- }
- ip->rx_ci = 0;
- ip->rx_pi = RX_BUFFS;
+ /* Because we reserve afterwards. */
+ skb_put(skb, (1664 + RX_OFFSET));
+ rxb = (struct ioc3_erxbuf *)skb->data;
+ ip->rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
+ skb_reserve(skb, RX_OFFSET);
}
+ ip->rx_ci = 0;
+ ip->rx_pi = RX_BUFFS;
- if (!ip->txr) {
- /* Allocate and initialize tx rings. 16kb = 128 bufs. */
- ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
- if (!ip->txr)
- pr_err("%s: __get_free_pages() failed!\n", __func__);
- ip->tx_pi = 0;
- ip->tx_ci = 0;
- }
+ ip->tx_pi = 0;
+ ip->tx_ci = 0;
}
static void ioc3_init_rings(struct net_device *dev)
@@ -1239,6 +1216,23 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
timer_setup(&ip->ioc3_timer, ioc3_timer, 0);
ioc3_stop(ip);
+
+ /* Allocate and rx ring. 4kb = 512 entries */
+ ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
+ if (!ip->rxr) {
+ pr_err("ioc3-eth: rx ring allocation failed\n");
+ err = -ENOMEM;
+ goto out_stop;
+ }
+
+ /* Allocate tx rings. 16kb = 128 bufs. */
+ ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
+ if (!ip->txr) {
+ pr_err("ioc3-eth: tx ring allocation failed\n");
+ err = -ENOMEM;
+ goto out_stop;
+ }
+
ioc3_init(dev);
ip->pdev = pdev;
@@ -1293,6 +1287,8 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ioc3_stop(ip);
del_timer_sync(&ip->ioc3_timer);
ioc3_free_rings(ip);
+ kfree(ip->rxr);
+ kfree(ip->txr);
out_res:
pci_release_regions(pdev);
out_free:
@@ -1310,6 +1306,9 @@ static void ioc3_remove_one(struct pci_dev *pdev)
struct net_device *dev = pci_get_drvdata(pdev);
struct ioc3_private *ip = netdev_priv(dev);
+ kfree(ip->rxr);
+ kfree(ip->txr);
+
unregister_netdev(dev);
del_timer_sync(&ip->ioc3_timer);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 09/15] net: sgi: ioc3-eth: split ring cleaning/freeing and allocation
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Do tx ring cleaning and freeing of rx buffers, when chip is shutdown and
allocate buffers before bringing chip up.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 28 +++++++++++++---------------
1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 05db0d1aeb04..7d2372ef7872 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -108,6 +108,9 @@ static inline unsigned int ioc3_hash(const unsigned char *addr);
static void ioc3_start(struct ioc3_private *ip);
static inline void ioc3_stop(struct ioc3_private *ip);
static void ioc3_init(struct net_device *dev);
+static void ioc3_alloc_rx_bufs(struct net_device *dev);
+static void ioc3_free_rx_bufs(struct ioc3_private *ip);
+static inline void ioc3_clean_tx_ring(struct ioc3_private *ip);
static const char ioc3_str[] = "IOC3 Ethernet";
static const struct ethtool_ops ioc3_ethtool_ops;
@@ -660,7 +663,11 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
net_err_ratelimited("%s: TX PCI error.\n", dev->name);
ioc3_stop(ip);
+ ioc3_free_rx_bufs(ip);
+ ioc3_clean_tx_ring(ip);
+
ioc3_init(dev);
+ ioc3_alloc_rx_bufs(dev);
ioc3_start(ip);
ioc3_mii_init(ip);
@@ -829,16 +836,6 @@ static void ioc3_alloc_rx_bufs(struct net_device *dev)
ip->rx_pi = RX_BUFFS;
}
-static void ioc3_init_rings(struct net_device *dev)
-{
- struct ioc3_private *ip = netdev_priv(dev);
-
- ioc3_free_rx_bufs(ip);
- ioc3_alloc_rx_bufs(dev);
-
- ioc3_clean_tx_ring(ip);
-}
-
static inline void ioc3_ssram_disc(struct ioc3_private *ip)
{
struct ioc3_ethregs *regs = ip->regs;
@@ -891,8 +888,6 @@ static void ioc3_init(struct net_device *dev)
writel(ip->ehar_h, ®s->ehar_h);
writel(ip->ehar_l, ®s->ehar_l);
writel(42, ®s->ersr); /* XXX should be random */
-
- ioc3_init_rings(dev);
}
static void ioc3_start(struct ioc3_private *ip)
@@ -948,7 +943,9 @@ static int ioc3_open(struct net_device *dev)
ip->ehar_h = 0;
ip->ehar_l = 0;
+
ioc3_init(dev);
+ ioc3_alloc_rx_bufs(dev);
ioc3_start(ip);
ioc3_mii_start(ip);
@@ -1218,7 +1215,6 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
ioc3_init(dev);
- ioc3_start(ip);
ip->pdev = pdev;
@@ -1269,9 +1265,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
return 0;
out_stop:
- ioc3_stop(ip);
del_timer_sync(&ip->ioc3_timer);
- ioc3_free_rx_bufs(ip);
kfree(ip->rxr);
kfree(ip->txr);
out_res:
@@ -1438,7 +1432,11 @@ static void ioc3_timeout(struct net_device *dev)
spin_lock_irq(&ip->ioc3_lock);
ioc3_stop(ip);
+ ioc3_free_rx_bufs(ip);
+ ioc3_clean_tx_ring(ip);
+
ioc3_init(dev);
+ ioc3_alloc_rx_bufs(dev);
ioc3_start(ip);
ioc3_mii_init(ip);
ioc3_mii_start(ip);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 03/15] net: sgi: ioc3-eth: remove checkpatch errors/warning
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Before massaging the driver further fix oddities found by checkpatch like
- wrong indention
- comment formatting
- use of printk instead or netdev_xxx/pr_xxx
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 275 +++++++++++++++++-------------------
1 file changed, 130 insertions(+), 145 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 713d2472cb97..51cc1389e204 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1,9 +1,5 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Driver for SGI's IOC3 based Ethernet cards as found in the PCI card.
+// SPDX-License-Identifier: GPL-2.0
+/* Driver for SGI's IOC3 based Ethernet cards as found in the PCI card.
*
* Copyright (C) 1999, 2000, 01, 03, 06 Ralf Baechle
* Copyright (C) 1995, 1999, 2000, 2001 by Silicon Graphics, Inc.
@@ -39,6 +35,7 @@
#include <linux/crc32.h>
#include <linux/mii.h>
#include <linux/in.h>
+#include <linux/io.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
@@ -58,21 +55,19 @@
#include <net/ip.h>
#include <asm/byteorder.h>
-#include <asm/io.h>
#include <asm/pgtable.h>
#include <linux/uaccess.h>
#include <asm/sn/types.h>
#include <asm/sn/ioc3.h>
#include <asm/pci/bridge.h>
-/*
- * 64 RX buffers. This is tunable in the range of 16 <= x < 512. The
+/* 64 RX buffers. This is tunable in the range of 16 <= x < 512. The
* value must be a power of two.
*/
#define RX_BUFFS 64
-#define ETCSR_FD ((17<<ETCSR_IPGR2_SHIFT) | (11<<ETCSR_IPGR1_SHIFT) | 21)
-#define ETCSR_HD ((21<<ETCSR_IPGR2_SHIFT) | (21<<ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_FD ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_HD ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
/* Private per NIC data of the driver. */
struct ioc3_private {
@@ -119,14 +114,15 @@ static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
return (~addr + 1) & (IOC3_CACHELINE - 1UL);
}
-static inline struct sk_buff * ioc3_alloc_skb(unsigned long length,
- unsigned int gfp_mask)
+static inline struct sk_buff *ioc3_alloc_skb(unsigned long length,
+ unsigned int gfp_mask)
{
struct sk_buff *skb;
skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask);
if (likely(skb)) {
- int offset = aligned_rx_skb_addr((unsigned long) skb->data);
+ int offset = aligned_rx_skb_addr((unsigned long)skb->data);
+
if (offset)
skb_reserve(skb, offset);
}
@@ -147,15 +143,11 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
}
/* BEWARE: The IOC3 documentation documents the size of rx buffers as
- 1644 while it's actually 1664. This one was nasty to track down ... */
+ * 1644 while it's actually 1664. This one was nasty to track down ...
+ */
#define RX_OFFSET 10
#define RX_BUF_ALLOC_SIZE (1664 + RX_OFFSET + IOC3_CACHELINE)
-/* DMA barrier to separate cached and uncached accesses. */
-#define BARRIER() \
- __asm__("sync" ::: "memory")
-
-
#define IOC3_SIZE 0x100000
static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -176,7 +168,7 @@ static int nic_wait(u32 __iomem *mcr)
static int nic_reset(u32 __iomem *mcr)
{
- int presence;
+ int presence;
writel(mcr_pack(500, 65), mcr);
presence = nic_wait(mcr);
@@ -184,7 +176,7 @@ static int nic_reset(u32 __iomem *mcr)
writel(mcr_pack(0, 500), mcr);
nic_wait(mcr);
- return presence;
+ return presence;
}
static inline int nic_read_bit(u32 __iomem *mcr)
@@ -209,8 +201,7 @@ static inline void nic_write_bit(u32 __iomem *mcr, int bit)
nic_wait(mcr);
}
-/*
- * Read a byte from an iButton device
+/* Read a byte from an iButton device
*/
static u32 nic_read_byte(u32 __iomem *mcr)
{
@@ -223,8 +214,7 @@ static u32 nic_read_byte(u32 __iomem *mcr)
return result;
}
-/*
- * Write a byte to an iButton device
+/* Write a byte to an iButton device
*/
static void nic_write_byte(u32 __iomem *mcr, int byte)
{
@@ -253,7 +243,7 @@ static u64 nic_find(u32 __iomem *mcr, int *last)
b = nic_read_bit(mcr);
if (a && b) {
- printk("NIC search failed (not fatal).\n");
+ pr_warn("NIC search failed (not fatal).\n");
*last = 0;
return 0;
}
@@ -264,8 +254,9 @@ static u64 nic_find(u32 __iomem *mcr, int *last)
} else if (index > *last) {
address &= ~(1UL << index);
disc = index;
- } else if ((address & (1UL << index)) == 0)
+ } else if ((address & (1UL << index)) == 0) {
disc = index;
+ }
nic_write_bit(mcr, address & (1UL << index));
continue;
} else {
@@ -293,6 +284,7 @@ static int nic_init(u32 __iomem *mcr)
while (1) {
u64 reg;
+
reg = nic_find(mcr, &save);
switch (reg & 0xff) {
@@ -323,16 +315,15 @@ static int nic_init(u32 __iomem *mcr)
break;
}
- printk("Found %s NIC", type);
+ pr_info("Found %s NIC", type);
if (type != unknown)
- printk (" registration number %pM, CRC %02x", serial, crc);
- printk(".\n");
+ pr_cont(" registration number %pM, CRC %02x", serial, crc);
+ pr_cont(".\n");
return 0;
}
-/*
- * Read the NIC (Number-In-a-Can) device used to store the MAC address on
+/* Read the NIC (Number-In-a-Can) device used to store the MAC address on
* SN0 / SN00 nodeboards and PCI cards.
*/
static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
@@ -351,7 +342,7 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
}
if (tries < 0) {
- printk("Failed to read MAC address\n");
+ pr_err("Failed to read MAC address\n");
return;
}
@@ -367,8 +358,7 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
ip->dev->dev_addr[i - 2] = nic[i];
}
-/*
- * Ok, this is hosed by design. It's necessary to know what machine the
+/* Ok, this is hosed by design. It's necessary to know what machine the
* NIC is in in order to know how to read the NIC address. We also have
* to know if it's a PCI card or a NIC in on the node board ...
*/
@@ -376,7 +366,7 @@ static void ioc3_get_eaddr(struct ioc3_private *ip)
{
ioc3_get_eaddr_nic(ip);
- printk("Ethernet address is %pM.\n", ip->dev->dev_addr);
+ pr_info("Ethernet address is %pM.\n", ip->dev->dev_addr);
}
static void __ioc3_set_mac_address(struct net_device *dev)
@@ -407,8 +397,7 @@ static int ioc3_set_mac_address(struct net_device *dev, void *addr)
return 0;
}
-/*
- * Caller must hold the ioc3_lock ever for MII readers. This is also
+/* Caller must hold the ioc3_lock ever for MII readers. This is also
* used to protect the transmitter side but it's low contention.
*/
static int ioc3_mdio_read(struct net_device *dev, int phy, int reg)
@@ -450,17 +439,16 @@ static struct net_device_stats *ioc3_get_stats(struct net_device *dev)
return &dev->stats;
}
-static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
+static void ioc3_tcpudp_checksum(struct sk_buff *skb, u32 hwsum, int len)
{
struct ethhdr *eh = eth_hdr(skb);
- uint32_t csum, ehsum;
unsigned int proto;
- struct iphdr *ih;
- uint16_t *ew;
unsigned char *cp;
+ struct iphdr *ih;
+ u32 csum, ehsum;
+ u16 *ew;
- /*
- * Did hardware handle the checksum at all? The cases we can handle
+ /* Did hardware handle the checksum at all? The cases we can handle
* are:
*
* - TCP and UDP checksums of IPv4 only.
@@ -476,7 +464,7 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
if (eh->h_proto != htons(ETH_P_IP))
return;
- ih = (struct iphdr *) ((char *)eh + ETH_HLEN);
+ ih = (struct iphdr *)((char *)eh + ETH_HLEN);
if (ip_is_fragment(ih))
return;
@@ -487,12 +475,12 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
/* Same as tx - compute csum of pseudo header */
csum = hwsum +
(ih->tot_len - (ih->ihl << 2)) +
- htons((uint16_t)ih->protocol) +
+ htons((u16)ih->protocol) +
(ih->saddr >> 16) + (ih->saddr & 0xffff) +
(ih->daddr >> 16) + (ih->daddr & 0xffff);
/* Sum up ethernet dest addr, src addr and protocol */
- ew = (uint16_t *) eh;
+ ew = (u16 *)eh;
ehsum = ew[0] + ew[1] + ew[2] + ew[3] + ew[4] + ew[5] + ew[6];
ehsum = (ehsum & 0xffff) + (ehsum >> 16);
@@ -501,14 +489,15 @@ static void ioc3_tcpudp_checksum(struct sk_buff *skb, uint32_t hwsum, int len)
csum += 0xffff ^ ehsum;
/* In the next step we also subtract the 1's complement
- checksum of the trailing ethernet CRC. */
+ * checksum of the trailing ethernet CRC.
+ */
cp = (char *)eh + len; /* points at trailing CRC */
if (len & 1) {
- csum += 0xffff ^ (uint16_t) ((cp[1] << 8) | cp[0]);
- csum += 0xffff ^ (uint16_t) ((cp[3] << 8) | cp[2]);
+ csum += 0xffff ^ (u16)((cp[1] << 8) | cp[0]);
+ csum += 0xffff ^ (u16)((cp[3] << 8) | cp[2]);
} else {
- csum += 0xffff ^ (uint16_t) ((cp[0] << 8) | cp[1]);
- csum += 0xffff ^ (uint16_t) ((cp[2] << 8) | cp[3]);
+ csum += 0xffff ^ (u16)((cp[0] << 8) | cp[1]);
+ csum += 0xffff ^ (u16)((cp[2] << 8) | cp[3]);
}
csum = (csum & 0xffff) + (csum >> 16);
@@ -532,7 +521,7 @@ static inline void ioc3_rx(struct net_device *dev)
n_entry = ip->rx_pi;
skb = ip->rx_skbs[rx_entry];
- rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+ rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
w0 = be32_to_cpu(rxb->w0);
while (w0 & ERXBUF_V) {
@@ -545,7 +534,8 @@ static inline void ioc3_rx(struct net_device *dev)
new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
if (!new_skb) {
/* Ouch, drop packet and just recycle packet
- to keep the ring filled. */
+ * to keep the ring filled.
+ */
dev->stats.rx_dropped++;
new_skb = skb;
goto next;
@@ -553,7 +543,8 @@ static inline void ioc3_rx(struct net_device *dev)
if (likely(dev->features & NETIF_F_RXCSUM))
ioc3_tcpudp_checksum(skb,
- w0 & ERXBUF_IPCKSUM_MASK, len);
+ w0 & ERXBUF_IPCKSUM_MASK,
+ len);
netif_rx(skb);
@@ -561,15 +552,16 @@ static inline void ioc3_rx(struct net_device *dev)
/* Because we reserve afterwards. */
skb_put(new_skb, (1664 + RX_OFFSET));
- rxb = (struct ioc3_erxbuf *) new_skb->data;
+ rxb = (struct ioc3_erxbuf *)new_skb->data;
skb_reserve(new_skb, RX_OFFSET);
dev->stats.rx_packets++; /* Statistics */
dev->stats.rx_bytes += len;
} else {
/* The frame is invalid and the skb never
- reached the network layer so we can just
- recycle it. */
+ * reached the network layer so we can just
+ * recycle it.
+ */
new_skb = skb;
dev->stats.rx_errors++;
}
@@ -586,7 +578,7 @@ static inline void ioc3_rx(struct net_device *dev)
/* Now go on to the next ring entry. */
rx_entry = (rx_entry + 1) & 511;
skb = ip->rx_skbs[rx_entry];
- rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+ rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
w0 = be32_to_cpu(rxb->w0);
}
writel((n_entry << 3) | ERPIR_ARM, &ip->regs->erpir);
@@ -635,8 +627,7 @@ static inline void ioc3_tx(struct net_device *dev)
spin_unlock(&ip->ioc3_lock);
}
-/*
- * Deal with fatal IOC3 errors. This condition might be caused by a hard or
+/* Deal with fatal IOC3 errors. This condition might be caused by a hard or
* software problems, so we should try to recover
* more gracefully if this ever happens. In theory we might be flooded
* with such error interrupts if something really goes wrong, so we might
@@ -645,22 +636,21 @@ static inline void ioc3_tx(struct net_device *dev)
static void ioc3_error(struct net_device *dev, u32 eisr)
{
struct ioc3_private *ip = netdev_priv(dev);
- unsigned char *iface = dev->name;
spin_lock(&ip->ioc3_lock);
if (eisr & EISR_RXOFLO)
- printk(KERN_ERR "%s: RX overflow.\n", iface);
+ net_err_ratelimited("%s: RX overflow.\n", dev->name);
if (eisr & EISR_RXBUFOFLO)
- printk(KERN_ERR "%s: RX buffer overflow.\n", iface);
+ net_err_ratelimited("%s: RX buffer overflow.\n", dev->name);
if (eisr & EISR_RXMEMERR)
- printk(KERN_ERR "%s: RX PCI error.\n", iface);
+ net_err_ratelimited("%s: RX PCI error.\n", dev->name);
if (eisr & EISR_RXPARERR)
- printk(KERN_ERR "%s: RX SSRAM parity error.\n", iface);
+ net_err_ratelimited("%s: RX SSRAM parity error.\n", dev->name);
if (eisr & EISR_TXBUFUFLO)
- printk(KERN_ERR "%s: TX buffer underflow.\n", iface);
+ net_err_ratelimited("%s: TX buffer underflow.\n", dev->name);
if (eisr & EISR_TXMEMERR)
- printk(KERN_ERR "%s: TX PCI error.\n", iface);
+ net_err_ratelimited("%s: TX PCI error.\n", dev->name);
ioc3_stop(ip);
ioc3_init(dev);
@@ -672,7 +662,8 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
}
/* The interrupt handler does all of the Rx thread work and cleans up
- after the Tx thread. */
+ * after the Tx thread.
+ */
static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
{
struct ioc3_private *ip = netdev_priv(dev_id);
@@ -684,7 +675,7 @@ static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
readl(®s->eisr); /* Flush */
if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR |
- EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
+ EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
ioc3_error(dev_id, eisr);
if (eisr & EISR_RXTIMERINT)
ioc3_rx(dev_id);
@@ -716,12 +707,11 @@ static void ioc3_timer(struct timer_list *t)
mii_check_media(&ip->mii, 1, 0);
ioc3_setup_duplex(ip);
- ip->ioc3_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2s */
+ ip->ioc3_timer.expires = jiffies + ((12 * HZ) / 10); /* 1.2s */
add_timer(&ip->ioc3_timer);
}
-/*
- * Try to find a PHY. There is no apparent relation between the MII addresses
+/* Try to find a PHY. There is no apparent relation between the MII addresses
* in the SGI documentation and what we find in reality, so we simply probe
* for the PHY. It seems IOC3 PHYs usually live on address 31. One of my
* onboard IOC3s has the special oddity that probing doesn't seem to find it
@@ -730,8 +720,8 @@ static void ioc3_timer(struct timer_list *t)
*/
static int ioc3_mii_init(struct ioc3_private *ip)
{
- int i, found = 0, res = 0;
int ioc3_phy_workaround = 1;
+ int i, found = 0, res = 0;
u16 word;
for (i = 0; i < 32; i++) {
@@ -744,9 +734,9 @@ static int ioc3_mii_init(struct ioc3_private *ip)
}
if (!found) {
- if (ioc3_phy_workaround)
+ if (ioc3_phy_workaround) {
i = 31;
- else {
+ } else {
ip->mii.phy_id = -1;
res = -ENODEV;
goto out;
@@ -761,12 +751,13 @@ static int ioc3_mii_init(struct ioc3_private *ip)
static void ioc3_mii_start(struct ioc3_private *ip)
{
- ip->ioc3_timer.expires = jiffies + (12 * HZ)/10; /* 1.2 sec. */
+ ip->ioc3_timer.expires = jiffies + (12 * HZ) / 10; /* 1.2 sec. */
add_timer(&ip->ioc3_timer);
}
static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
{
+ struct ioc3_erxbuf *rxb;
struct sk_buff *skb;
int i;
@@ -777,10 +768,9 @@ static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
ip->rx_pi &= 511;
ip->rx_ci &= 511;
- for (i = ip->rx_ci; i != ip->rx_pi; i = (i+1) & 511) {
- struct ioc3_erxbuf *rxb;
+ for (i = ip->rx_ci; i != ip->rx_pi; i = (i + 1) & 511) {
skb = ip->rx_skbs[i];
- rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
+ rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
rxb->w0 = 0;
}
}
@@ -790,7 +780,7 @@ static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
struct sk_buff *skb;
int i;
- for (i=0; i < 128; i++) {
+ for (i = 0; i < 128; i++) {
skb = ip->tx_skbs[i];
if (skb) {
ip->tx_skbs[i] = NULL;
@@ -836,16 +826,17 @@ static void ioc3_alloc_rings(struct net_device *dev)
unsigned long *rxr;
int i;
- if (ip->rxr == NULL) {
+ if (!ip->rxr) {
/* Allocate and initialize rx ring. 4kb = 512 entries */
- ip->rxr = (unsigned long *) get_zeroed_page(GFP_ATOMIC);
+ ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
rxr = ip->rxr;
if (!rxr)
- printk("ioc3_alloc_rings(): get_zeroed_page() failed!\n");
+ pr_err("%s: get_zeroed_page() failed!\n", __func__);
/* Now the rx buffers. The RX ring may be larger but
- we only allocate 16 buffers for now. Need to tune
- this for performance and memory later. */
+ * we only allocate 16 buffers for now. Need to tune
+ * this for performance and memory later.
+ */
for (i = 0; i < RX_BUFFS; i++) {
struct sk_buff *skb;
@@ -859,7 +850,7 @@ static void ioc3_alloc_rings(struct net_device *dev)
/* Because we reserve afterwards. */
skb_put(skb, (1664 + RX_OFFSET));
- rxb = (struct ioc3_erxbuf *) skb->data;
+ rxb = (struct ioc3_erxbuf *)skb->data;
rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
skb_reserve(skb, RX_OFFSET);
}
@@ -867,11 +858,11 @@ static void ioc3_alloc_rings(struct net_device *dev)
ip->rx_pi = RX_BUFFS;
}
- if (ip->txr == NULL) {
+ if (!ip->txr) {
/* Allocate and initialize tx rings. 16kb = 128 bufs. */
ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
if (!ip->txr)
- printk("ioc3_alloc_rings(): __get_free_pages() failed!\n");
+ pr_err("%s: __get_free_pages() failed!\n", __func__);
ip->tx_pi = 0;
ip->tx_ci = 0;
}
@@ -964,7 +955,7 @@ static void ioc3_init(struct net_device *dev)
ioc3_init_rings(dev);
ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
- EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
+ EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
writel(ip->emcr, ®s->emcr);
writel(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
@@ -986,7 +977,7 @@ static int ioc3_open(struct net_device *dev)
struct ioc3_private *ip = netdev_priv(dev);
if (request_irq(dev->irq, ioc3_interrupt, IRQF_SHARED, ioc3_str, dev)) {
- printk(KERN_ERR "%s: Can't get irq %d\n", dev->name, dev->irq);
+ netdev_err(dev, "Can't get irq %d\n", dev->irq);
return -EAGAIN;
}
@@ -1015,8 +1006,7 @@ static int ioc3_close(struct net_device *dev)
return 0;
}
-/*
- * MENET cards have four IOC3 chips, which are attached to two sets of
+/* MENET cards have four IOC3 chips, which are attached to two sets of
* PCI slot resources each: the primary connections are on slots
* 0..3 and the secondaries are on 4..7
*
@@ -1033,7 +1023,7 @@ static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
if (dev) {
if (dev->vendor == PCI_VENDOR_ID_SGI &&
- dev->device == PCI_DEVICE_ID_SGI_IOC3)
+ dev->device == PCI_DEVICE_ID_SGI_IOC3)
ret = 1;
pci_dev_put(dev);
}
@@ -1043,15 +1033,14 @@ static int ioc3_adjacent_is_ioc3(struct pci_dev *pdev, int slot)
static int ioc3_is_menet(struct pci_dev *pdev)
{
- return pdev->bus->parent == NULL &&
+ return !pdev->bus->parent &&
ioc3_adjacent_is_ioc3(pdev, 0) &&
ioc3_adjacent_is_ioc3(pdev, 1) &&
ioc3_adjacent_is_ioc3(pdev, 2);
}
#ifdef CONFIG_SERIAL_8250
-/*
- * Note about serial ports and consoles:
+/* Note about serial ports and consoles:
* For console output, everyone uses the IOC3 UARTA (offset 0x178)
* connected to the master node (look in ip27_setup_console() and
* ip27prom_console_write()).
@@ -1088,16 +1077,16 @@ static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
#define COSMISC_CONSTANT 6
struct uart_8250_port port = {
- .port = {
+ .port = {
.irq = 0,
.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
.iotype = UPIO_MEM,
.regshift = 0,
.uartclk = (22000000 << 1) / COSMISC_CONSTANT,
- .membase = (unsigned char __iomem *) uart,
- .mapbase = (unsigned long) uart,
- }
+ .membase = (unsigned char __iomem *)uart,
+ .mapbase = (unsigned long)uart,
+ }
};
unsigned char lcr;
@@ -1113,8 +1102,7 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
{
u32 sio_iec;
- /*
- * We need to recognice and treat the fourth MENET serial as it
+ /* We need to recognice and treat the fourth MENET serial as it
* does not have an SuperIO chip attached to it, therefore attempting
* to access it will result in bus errors. We call something an
* MENET if PCI slot 0, 1, 2 and 3 of a master PCI bus all have an IOC3
@@ -1125,8 +1113,7 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
if (ioc3_is_menet(pdev) && PCI_SLOT(pdev->devfn) == 3)
return;
- /*
- * Switch IOC3 to PIO mode. It probably already was but let's be
+ /* Switch IOC3 to PIO mode. It probably already was but let's be
* paranoid
*/
writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
@@ -1188,15 +1175,15 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_using_dac = 1;
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err < 0) {
- printk(KERN_ERR "%s: Unable to obtain 64 bit DMA "
- "for consistent allocations\n", pci_name(pdev));
+ pr_err("%s: Unable to obtain 64 bit DMA for consistent allocations\n",
+ pci_name(pdev));
goto out;
}
} else {
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err) {
- printk(KERN_ERR "%s: No usable DMA configuration, "
- "aborting.\n", pci_name(pdev));
+ pr_err("%s: No usable DMA configuration, aborting.\n",
+ pci_name(pdev));
goto out;
}
pci_using_dac = 0;
@@ -1227,9 +1214,9 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ioc3_base = pci_resource_start(pdev, 0);
ioc3_size = pci_resource_len(pdev, 0);
- ioc3 = (struct ioc3 *) ioremap(ioc3_base, ioc3_size);
+ ioc3 = (struct ioc3 *)ioremap(ioc3_base, ioc3_size);
if (!ioc3) {
- printk(KERN_CRIT "ioc3eth(%s): ioremap failed, goodbye.\n",
+ pr_err("ioc3eth(%s): ioremap failed, goodbye.\n",
pci_name(pdev));
err = -ENOMEM;
goto out_res;
@@ -1259,7 +1246,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ioc3_mii_init(ip);
if (ip->mii.phy_id == -1) {
- printk(KERN_CRIT "ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
+ pr_err("ioc3-eth(%s): Didn't find a PHY, goodbye.\n",
pci_name(pdev));
err = -ENODEV;
goto out_stop;
@@ -1289,10 +1276,10 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
vendor = (sw_physid1 << 12) | (sw_physid2 >> 4);
model = (sw_physid2 >> 4) & 0x3f;
rev = sw_physid2 & 0xf;
- printk(KERN_INFO "%s: Using PHY %d, vendor 0x%x, model %d, "
- "rev %d.\n", dev->name, ip->mii.phy_id, vendor, model, rev);
- printk(KERN_INFO "%s: IOC3 SSRAM has %d kbyte.\n", dev->name,
- ip->emcr & EMCR_BUFSIZ ? 128 : 64);
+ netdev_info(dev, "Using PHY %d, vendor 0x%x, model %d, rev %d.\n",
+ ip->mii.phy_id, vendor, model, rev);
+ netdev_info(dev, "IOC3 SSRAM has %d kbyte.\n",
+ ip->emcr & EMCR_BUFSIZ ? 128 : 64);
return 0;
@@ -1305,8 +1292,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
out_free:
free_netdev(dev);
out_disable:
- /*
- * We should call pci_disable_device(pdev); here if the IOC3 wasn't
+ /* We should call pci_disable_device(pdev); here if the IOC3 wasn't
* such a weird device ...
*/
out:
@@ -1324,8 +1310,7 @@ static void ioc3_remove_one(struct pci_dev *pdev)
iounmap(ip->all_regs);
pci_release_regions(pdev);
free_netdev(dev);
- /*
- * We should call pci_disable_device(pdev); here if the IOC3 wasn't
+ /* We should call pci_disable_device(pdev); here if the IOC3 wasn't
* such a weird device ...
*/
}
@@ -1349,11 +1334,10 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
struct ioc3_etxd *desc;
unsigned long data;
unsigned int len;
- uint32_t w0 = 0;
int produce;
+ u32 w0 = 0;
- /*
- * IOC3 has a fairly simple minded checksumming hardware which simply
+ /* IOC3 has a fairly simple minded checksumming hardware which simply
* adds up the 1's complement checksum for the entire packet and
* inserts it at an offset which can be specified in the descriptor
* into the transmit packet. This means we have to compensate for the
@@ -1364,12 +1348,13 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
const struct iphdr *ih = ip_hdr(skb);
const int proto = ntohs(ih->protocol);
unsigned int csoff;
- uint32_t csum, ehsum;
- uint16_t *eh;
+ u32 csum, ehsum;
+ u16 *eh;
/* The MAC header. skb->mac seem the logic approach
- to find the MAC header - except it's a NULL pointer ... */
- eh = (uint16_t *) skb->data;
+ * to find the MAC header - except it's a NULL pointer ...
+ */
+ eh = (u16 *)skb->data;
/* Sum up dest addr, src addr and protocol */
ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6];
@@ -1379,10 +1364,11 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
ehsum = (ehsum & 0xffff) + (ehsum >> 16);
/* Skip IP header; it's sum is always zero and was
- already filled in by ip_output.c */
+ * already filled in by ip_output.c
+ */
csum = csum_tcpudp_nofold(ih->saddr, ih->daddr,
- ih->tot_len - (ih->ihl << 2),
- proto, 0xffff ^ ehsum);
+ ih->tot_len - (ih->ihl << 2),
+ proto, 0xffff ^ ehsum);
csum = (csum & 0xffff) + (csum >> 16); /* Fold again */
csum = (csum & 0xffff) + (csum >> 16);
@@ -1402,7 +1388,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
spin_lock_irq(&ip->ioc3_lock);
- data = (unsigned long) skb->data;
+ data = (unsigned long)skb->data;
len = skb->len;
produce = ip->tx_pi;
@@ -1424,11 +1410,11 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
unsigned long s2 = data + len - b2;
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE |
- ETXD_B1V | ETXD_B2V | w0);
+ ETXD_B1V | ETXD_B2V | w0);
desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) |
- (s2 << ETXD_B2CNT_SHIFT));
+ (s2 << ETXD_B2CNT_SHIFT));
desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1));
- desc->p2 = cpu_to_be64(ioc3_map((void *) b2, 1));
+ desc->p2 = cpu_to_be64(ioc3_map((void *)b2, 1));
} else {
/* Normal sized packet that doesn't cross a page boundary. */
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0);
@@ -1436,7 +1422,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1));
}
- BARRIER();
+ mb(); /* make sure all descriptor changes are visible */
ip->tx_skbs[produce] = skb; /* Remember skb */
produce = (produce + 1) & 127;
@@ -1457,7 +1443,7 @@ static void ioc3_timeout(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- printk(KERN_ERR "%s: transmit timed out, resetting\n", dev->name);
+ netdev_err(dev, "transmit timed out, resetting\n");
spin_lock_irq(&ip->ioc3_lock);
@@ -1471,16 +1457,14 @@ static void ioc3_timeout(struct net_device *dev)
netif_wake_queue(dev);
}
-/*
- * Given a multicast ethernet address, this routine calculates the
+/* Given a multicast ethernet address, this routine calculates the
* address's bit index in the logical address filter mask
*/
-
static inline unsigned int ioc3_hash(const unsigned char *addr)
{
unsigned int temp = 0;
- u32 crc;
int bits;
+ u32 crc;
crc = ether_crc_le(ETH_ALEN, addr);
@@ -1494,8 +1478,8 @@ static inline unsigned int ioc3_hash(const unsigned char *addr)
return temp;
}
-static void ioc3_get_drvinfo (struct net_device *dev,
- struct ethtool_drvinfo *info)
+static void ioc3_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
{
struct ioc3_private *ip = netdev_priv(dev);
@@ -1594,8 +1578,9 @@ static void ioc3_set_multicast_list(struct net_device *dev)
if ((dev->flags & IFF_ALLMULTI) ||
(netdev_mc_count(dev) > 64)) {
/* Too many for hashing to make sense or we want all
- multicast packets anyway, so skip computing all the
- hashes and just accept all packets. */
+ * multicast packets anyway, so skip computing all the
+ * hashes and just accept all packets.
+ */
ip->ehar_h = 0xffffffff;
ip->ehar_l = 0xffffffff;
} else {
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 11/15] net: sgi: ioc3-eth: use dma-direct for dma allocations
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Replace the homegrown DMA memory allocation, which only works on
SGI-IP27 machines, with the generic dma allocations.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 146 ++++++++++++++++++++++++++++--------
1 file changed, 114 insertions(+), 32 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 9cb04ac283e4..d62a75f2ed29 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -36,7 +36,6 @@
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/udp.h>
-#include <linux/dma-mapping.h>
#include <linux/gfp.h>
#ifdef CONFIG_SERIAL_8250
@@ -49,6 +48,8 @@
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
+#include <linux/dma-direct.h>
+
#include <net/ip.h>
#include <asm/byteorder.h>
@@ -64,10 +65,12 @@
#define RX_BUFFS 64
#define RX_RING_ENTRIES 512 /* fixed in hardware */
#define RX_RING_MASK (RX_RING_ENTRIES - 1)
+#define RX_RING_SIZE (RX_RING_ENTRIES * sizeof(u64))
/* 128 TX buffers (not tunable) */
#define TX_RING_ENTRIES 128
#define TX_RING_MASK (TX_RING_ENTRIES - 1)
+#define TX_RING_SIZE (TX_RING_ENTRIES * sizeof(struct ioc3_etxd))
/* IOC3 does dma transfers in 128 byte blocks */
#define IOC3_DMA_XFER_LEN 128UL
@@ -83,9 +86,12 @@
struct ioc3_private {
struct ioc3_ethregs *regs;
struct ioc3 *all_regs;
+ struct device *dma_dev;
u32 *ssram;
unsigned long *rxr; /* pointer to receiver ring */
struct ioc3_etxd *txr;
+ dma_addr_t rxr_dma;
+ dma_addr_t txr_dma;
struct sk_buff *rx_skbs[RX_RING_ENTRIES];
struct sk_buff *tx_skbs[TX_RING_ENTRIES];
int rx_ci; /* RX consumer index */
@@ -125,9 +131,11 @@ static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
return (~addr + 1) & (IOC3_DMA_XFER_LEN - 1UL);
}
-static inline int ioc3_alloc_skb(struct sk_buff **skb, struct ioc3_erxbuf **rxb)
+static inline int ioc3_alloc_skb(struct ioc3_private *ip, struct sk_buff **skb,
+ struct ioc3_erxbuf **rxb, dma_addr_t *rxb_dma)
{
struct sk_buff *new_skb;
+ dma_addr_t d;
int offset;
new_skb = alloc_skb(RX_BUF_SIZE + IOC3_DMA_XFER_LEN - 1, GFP_ATOMIC);
@@ -139,6 +147,14 @@ static inline int ioc3_alloc_skb(struct sk_buff **skb, struct ioc3_erxbuf **rxb)
if (offset)
skb_reserve(new_skb, offset);
+ d = dma_map_single(ip->dma_dev, new_skb->data,
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(ip->dma_dev, d)) {
+ dev_kfree_skb_any(new_skb);
+ return -ENOMEM;
+ }
+ *rxb_dma = d;
*rxb = (struct ioc3_erxbuf *)new_skb->data;
skb_reserve(new_skb, RX_OFFSET);
*skb = new_skb;
@@ -146,17 +162,22 @@ static inline int ioc3_alloc_skb(struct sk_buff **skb, struct ioc3_erxbuf **rxb)
return 0;
}
-static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
+#ifdef CONFIG_PCI_XTALK_BRIDGE
+static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
{
-#ifdef CONFIG_SGI_IP27
- vdev <<= 57; /* Shift to PCI64_ATTR_VIRTUAL */
+ return (addr & ~PCI64_ATTR_BAR) | attr;
+}
- return vdev | (0xaUL << PCI64_ATTR_TARG_SHFT) | PCI64_ATTR_PREF |
- ((unsigned long)ptr & TO_PHYS_MASK);
+#define ERBAR_VAL (ERBAR_BARRIER_BIT << ERBAR_RXBARR_SHIFT)
#else
- return virt_to_bus(ptr);
-#endif
+static inline unsigned long ioc3_map(dma_addr_t addr, unsigned long attr)
+{
+ return addr;
}
+
+#define ERBAR_VAL 0
+#endif
+
#define IOC3_SIZE 0x100000
static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -523,6 +544,7 @@ static inline void ioc3_rx(struct net_device *dev)
int rx_entry, n_entry, len;
struct ioc3_erxbuf *rxb;
unsigned long *rxr;
+ dma_addr_t d;
u32 w0, err;
rxr = ip->rxr; /* Ring base */
@@ -540,12 +562,13 @@ static inline void ioc3_rx(struct net_device *dev)
skb_put(skb, len);
skb->protocol = eth_type_trans(skb, dev);
- if (ioc3_alloc_skb(&new_skb, &rxb)) {
+ if (ioc3_alloc_skb(ip, &new_skb, &rxb, &d)) {
/* Ouch, drop packet and just recycle packet
* to keep the ring filled.
*/
dev->stats.rx_dropped++;
new_skb = skb;
+ d = rxr[rx_entry];
goto next;
}
@@ -554,6 +577,9 @@ static inline void ioc3_rx(struct net_device *dev)
w0 & ERXBUF_IPCKSUM_MASK,
len);
+ dma_unmap_single(ip->dma_dev, rxr[rx_entry],
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
+
netif_rx(skb);
ip->rx_skbs[rx_entry] = NULL; /* Poison */
@@ -566,15 +592,17 @@ static inline void ioc3_rx(struct net_device *dev)
* recycle it.
*/
new_skb = skb;
+ d = rxr[rx_entry];
dev->stats.rx_errors++;
}
if (err & ERXBUF_CRCERR) /* Statistics */
dev->stats.rx_crc_errors++;
if (err & ERXBUF_FRAMERR)
dev->stats.rx_frame_errors++;
+
next:
ip->rx_skbs[n_entry] = new_skb;
- rxr[n_entry] = cpu_to_be64(ioc3_map(rxb, 1));
+ rxr[n_entry] = cpu_to_be64(ioc3_map(d, PCI64_ATTR_BAR));
rxb->w0 = 0; /* Clear valid flag */
n_entry = (n_entry + 1) & RX_RING_MASK; /* Update erpir */
@@ -767,6 +795,26 @@ static void ioc3_mii_start(struct ioc3_private *ip)
add_timer(&ip->ioc3_timer);
}
+static inline void ioc3_tx_unmap(struct ioc3_private *ip, int entry)
+{
+ struct ioc3_etxd *desc;
+ u32 cmd, bufcnt, len;
+
+ desc = &ip->txr[entry];
+ cmd = be32_to_cpu(desc->cmd);
+ bufcnt = be32_to_cpu(desc->bufcnt);
+ if (cmd & ETXD_B1V) {
+ len = (bufcnt & ETXD_B1CNT_MASK) >> ETXD_B1CNT_SHIFT;
+ dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p1),
+ len, DMA_TO_DEVICE);
+ }
+ if (cmd & ETXD_B2V) {
+ len = (bufcnt & ETXD_B2CNT_MASK) >> ETXD_B2CNT_SHIFT;
+ dma_unmap_single(ip->dma_dev, be64_to_cpu(desc->p2),
+ len, DMA_TO_DEVICE);
+ }
+}
+
static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
{
struct sk_buff *skb;
@@ -775,6 +823,7 @@ static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
for (i = 0; i < TX_RING_ENTRIES; i++) {
skb = ip->tx_skbs[i];
if (skb) {
+ ioc3_tx_unmap(ip, i);
ip->tx_skbs[i] = NULL;
dev_kfree_skb_any(skb);
}
@@ -794,8 +843,12 @@ static void ioc3_free_rx_bufs(struct ioc3_private *ip)
while (n_entry != rx_entry) {
skb = ip->rx_skbs[n_entry];
- if (skb)
+ if (skb) {
+ dma_unmap_single(ip->dma_dev,
+ be64_to_cpu(ip->rxr[n_entry]),
+ RX_BUF_SIZE, DMA_FROM_DEVICE);
dev_kfree_skb_any(skb);
+ }
n_entry = (n_entry + 1) & RX_RING_MASK;
}
@@ -805,6 +858,7 @@ static int ioc3_alloc_rx_bufs(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
struct ioc3_erxbuf *rxb;
+ dma_addr_t d;
int i;
/* Now the rx buffers. The RX ring may be larger but
@@ -812,11 +866,11 @@ static int ioc3_alloc_rx_bufs(struct net_device *dev)
* this for performance and memory later.
*/
for (i = 0; i < RX_BUFFS; i++) {
- if (ioc3_alloc_skb(&ip->rx_skbs[i], &rxb))
+ if (ioc3_alloc_skb(ip, &ip->rx_skbs[i], &rxb, &d))
return -ENOMEM;
rxb->w0 = 0; /* Clear valid flag */
- ip->rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
+ ip->rxr[i] = cpu_to_be64(ioc3_map(d, PCI64_ATTR_BAR));
}
ip->rx_ci = 0;
ip->rx_pi = RX_BUFFS;
@@ -862,13 +916,7 @@ static void ioc3_init(struct net_device *dev)
readl(®s->emcr);
/* Misc registers */
-#ifdef CONFIG_SGI_IP27
- /* Barrier on last store */
- writel(PCI64_ATTR_BAR >> 32, ®s->erbar);
-#else
- /* Let PCI API get it right */
- writel(0, ®s->erbar);
-#endif
+ writel(ERBAR_VAL, ®s->erbar);
readl(®s->etcdc); /* Clear on read */
writel(15, ®s->ercsr); /* RX low watermark */
writel(0, ®s->ertr); /* Interrupt immediately */
@@ -884,13 +932,13 @@ static void ioc3_start(struct ioc3_private *ip)
unsigned long ring;
/* Now the rx ring base, consume & produce registers. */
- ring = ioc3_map(ip->rxr, 0);
+ ring = ioc3_map(ip->rxr_dma, PCI64_ATTR_PREC);
writel(ring >> 32, ®s->erbr_h);
writel(ring & 0xffffffff, ®s->erbr_l);
writel(ip->rx_ci << 3, ®s->ercir);
writel((ip->rx_pi << 3) | ERPIR_ARM, ®s->erpir);
- ring = ioc3_map(ip->txr, 0);
+ ring = ioc3_map(ip->txr_dma, PCI64_ATTR_PREC);
ip->txqlen = 0; /* nothing queued */
@@ -1164,6 +1212,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ip = netdev_priv(dev);
ip->dev = dev;
+ ip->dma_dev = &pdev->dev;
dev->irq = pdev->irq;
@@ -1190,7 +1239,8 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
ioc3_stop(ip);
/* Allocate and rx ring. 4kb = 512 entries */
- ip->rxr = (unsigned long *)get_zeroed_page(GFP_ATOMIC);
+ ip->rxr = dma_direct_alloc_pages(ip->dma_dev, RX_RING_SIZE,
+ &ip->rxr_dma, GFP_ATOMIC, 0);
if (!ip->rxr) {
pr_err("ioc3-eth: rx ring allocation failed\n");
err = -ENOMEM;
@@ -1198,7 +1248,9 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
/* Allocate tx rings. 16kb = 128 bufs. */
- ip->txr = (struct ioc3_etxd *)__get_free_pages(GFP_KERNEL, 2);
+ ip->txr = dma_direct_alloc_pages(ip->dma_dev, TX_RING_SIZE,
+ &ip->txr_dma,
+ GFP_KERNEL | __GFP_ZERO, 0);
if (!ip->txr) {
pr_err("ioc3-eth: tx ring allocation failed\n");
err = -ENOMEM;
@@ -1257,8 +1309,12 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
out_stop:
del_timer_sync(&ip->ioc3_timer);
- kfree(ip->rxr);
- kfree(ip->txr);
+ if (ip->rxr)
+ dma_direct_free_pages(ip->dma_dev, RX_RING_SIZE, ip->rxr,
+ ip->rxr_dma, 0);
+ if (ip->txr)
+ dma_direct_free_pages(ip->dma_dev, TX_RING_SIZE, ip->txr,
+ ip->txr_dma, 0);
out_res:
pci_release_regions(pdev);
out_free:
@@ -1276,8 +1332,12 @@ static void ioc3_remove_one(struct pci_dev *pdev)
struct net_device *dev = pci_get_drvdata(pdev);
struct ioc3_private *ip = netdev_priv(dev);
- kfree(ip->rxr);
- kfree(ip->txr);
+ if (ip->rxr)
+ dma_direct_free_pages(ip->dma_dev, RX_RING_SIZE, ip->rxr,
+ ip->rxr_dma, 0);
+ if (ip->txr)
+ dma_direct_free_pages(ip->dma_dev, TX_RING_SIZE, ip->txr,
+ ip->txr_dma, 0);
unregister_netdev(dev);
del_timer_sync(&ip->ioc3_timer);
@@ -1383,18 +1443,32 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
unsigned long b2 = (data | 0x3fffUL) + 1UL;
unsigned long s1 = b2 - data;
unsigned long s2 = data + len - b2;
+ dma_addr_t d1, d2;
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE |
ETXD_B1V | ETXD_B2V | w0);
desc->bufcnt = cpu_to_be32((s1 << ETXD_B1CNT_SHIFT) |
(s2 << ETXD_B2CNT_SHIFT));
- desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1));
- desc->p2 = cpu_to_be64(ioc3_map((void *)b2, 1));
+ d1 = dma_map_single(ip->dma_dev, skb->data, s1, DMA_TO_DEVICE);
+ if (dma_mapping_error(ip->dma_dev, d1))
+ goto drop_packet;
+ d2 = dma_map_single(ip->dma_dev, (void *)b2, s1, DMA_TO_DEVICE);
+ if (dma_mapping_error(ip->dma_dev, d2)) {
+ dma_unmap_single(ip->dma_dev, d1, len, DMA_TO_DEVICE);
+ goto drop_packet;
+ }
+ desc->p1 = cpu_to_be64(ioc3_map(d1, PCI64_ATTR_PREF));
+ desc->p2 = cpu_to_be64(ioc3_map(d2, PCI64_ATTR_PREF));
} else {
+ dma_addr_t d;
+
/* Normal sized packet that doesn't cross a page boundary. */
desc->cmd = cpu_to_be32(len | ETXD_INTWHENDONE | ETXD_B1V | w0);
desc->bufcnt = cpu_to_be32(len << ETXD_B1CNT_SHIFT);
- desc->p1 = cpu_to_be64(ioc3_map(skb->data, 1));
+ d = dma_map_single(ip->dma_dev, skb->data, len, DMA_TO_DEVICE);
+ if (dma_mapping_error(ip->dma_dev, d))
+ goto drop_packet;
+ desc->p1 = cpu_to_be64(ioc3_map(d, PCI64_ATTR_PREF));
}
mb(); /* make sure all descriptor changes are visible */
@@ -1412,6 +1486,14 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
spin_unlock_irq(&ip->ioc3_lock);
return NETDEV_TX_OK;
+
+drop_packet:
+ dev_kfree_skb_any(skb);
+ dev->stats.tx_dropped++;
+
+ spin_unlock_irq(&ip->ioc3_lock);
+
+ return NETDEV_TX_OK;
}
static void ioc3_timeout(struct net_device *dev)
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 12/15] net: sgi: ioc3-eth: use csum_fold
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
replace open coded checksum folding by csum_fold.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d62a75f2ed29..0c2713bba741 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -1394,16 +1394,12 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* Sum up dest addr, src addr and protocol */
ehsum = eh[0] + eh[1] + eh[2] + eh[3] + eh[4] + eh[5] + eh[6];
- /* Fold ehsum. can't use csum_fold which negates also ... */
- ehsum = (ehsum & 0xffff) + (ehsum >> 16);
- ehsum = (ehsum & 0xffff) + (ehsum >> 16);
-
/* Skip IP header; it's sum is always zero and was
* already filled in by ip_output.c
*/
csum = csum_tcpudp_nofold(ih->saddr, ih->daddr,
ih->tot_len - (ih->ihl << 2),
- proto, 0xffff ^ ehsum);
+ proto, csum_fold(ehsum));
csum = (csum & 0xffff) + (csum >> 16); /* Fold again */
csum = (csum & 0xffff) + (csum >> 16);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 10/15] net: sgi: ioc3-eth: refactor rx buffer allocation
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Move common code for rx buffer setup into ioc3_alloc_skb and deal
with allocation failures. Also clean up allocation size calculation.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 95 ++++++++++++++++++-------------------
1 file changed, 45 insertions(+), 50 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 7d2372ef7872..9cb04ac283e4 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -11,11 +11,8 @@
*
* To do:
*
- * o Handle allocation failures in ioc3_alloc_skb() more gracefully.
- * o Handle allocation failures in ioc3_init_rings().
* o Use prefetching for large packets. What is a good lower limit for
* prefetching?
- * o We're probably allocating a bit too much memory.
* o Use hardware checksums.
* o Convert to using a IOC3 meta driver.
* o Which PHYs might possibly be attached to the IOC3 in real live,
@@ -72,6 +69,13 @@
#define TX_RING_ENTRIES 128
#define TX_RING_MASK (TX_RING_ENTRIES - 1)
+/* IOC3 does dma transfers in 128 byte blocks */
+#define IOC3_DMA_XFER_LEN 128UL
+
+/* Every RX buffer starts with 8 byte descriptor data */
+#define RX_OFFSET (sizeof(struct ioc3_erxbuf) + NET_IP_ALIGN)
+#define RX_BUF_SIZE (13 * IOC3_DMA_XFER_LEN)
+
#define ETCSR_FD ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
#define ETCSR_HD ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
@@ -108,36 +112,38 @@ static inline unsigned int ioc3_hash(const unsigned char *addr);
static void ioc3_start(struct ioc3_private *ip);
static inline void ioc3_stop(struct ioc3_private *ip);
static void ioc3_init(struct net_device *dev);
-static void ioc3_alloc_rx_bufs(struct net_device *dev);
+static int ioc3_alloc_rx_bufs(struct net_device *dev);
static void ioc3_free_rx_bufs(struct ioc3_private *ip);
static inline void ioc3_clean_tx_ring(struct ioc3_private *ip);
static const char ioc3_str[] = "IOC3 Ethernet";
static const struct ethtool_ops ioc3_ethtool_ops;
-/* We use this to acquire receive skb's that we can DMA directly into. */
-
-#define IOC3_CACHELINE 128UL
static inline unsigned long aligned_rx_skb_addr(unsigned long addr)
{
- return (~addr + 1) & (IOC3_CACHELINE - 1UL);
+ return (~addr + 1) & (IOC3_DMA_XFER_LEN - 1UL);
}
-static inline struct sk_buff *ioc3_alloc_skb(unsigned long length,
- unsigned int gfp_mask)
+static inline int ioc3_alloc_skb(struct sk_buff **skb, struct ioc3_erxbuf **rxb)
{
- struct sk_buff *skb;
+ struct sk_buff *new_skb;
+ int offset;
- skb = alloc_skb(length + IOC3_CACHELINE - 1, gfp_mask);
- if (likely(skb)) {
- int offset = aligned_rx_skb_addr((unsigned long)skb->data);
+ new_skb = alloc_skb(RX_BUF_SIZE + IOC3_DMA_XFER_LEN - 1, GFP_ATOMIC);
+ if (!new_skb)
+ return -ENOMEM;
- if (offset)
- skb_reserve(skb, offset);
- }
+ /* ensure buffer is aligned to IOC3_DMA_XFER_LEN */
+ offset = aligned_rx_skb_addr((unsigned long)new_skb->data);
+ if (offset)
+ skb_reserve(new_skb, offset);
+
+ *rxb = (struct ioc3_erxbuf *)new_skb->data;
+ skb_reserve(new_skb, RX_OFFSET);
+ *skb = new_skb;
- return skb;
+ return 0;
}
static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
@@ -151,13 +157,6 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
return virt_to_bus(ptr);
#endif
}
-
-/* BEWARE: The IOC3 documentation documents the size of rx buffers as
- * 1644 while it's actually 1664. This one was nasty to track down ...
- */
-#define RX_OFFSET 10
-#define RX_BUF_ALLOC_SIZE (1664 + RX_OFFSET + IOC3_CACHELINE)
-
#define IOC3_SIZE 0x100000
static inline u32 mcr_pack(u32 pulse, u32 sample)
@@ -538,11 +537,10 @@ static inline void ioc3_rx(struct net_device *dev)
err = be32_to_cpu(rxb->err); /* It's valid ... */
if (err & ERXBUF_GOODPKT) {
len = ((w0 >> ERXBUF_BYTECNT_SHIFT) & 0x7ff) - 4;
- skb_trim(skb, len);
+ skb_put(skb, len);
skb->protocol = eth_type_trans(skb, dev);
- new_skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if (!new_skb) {
+ if (ioc3_alloc_skb(&new_skb, &rxb)) {
/* Ouch, drop packet and just recycle packet
* to keep the ring filled.
*/
@@ -560,11 +558,6 @@ static inline void ioc3_rx(struct net_device *dev)
ip->rx_skbs[rx_entry] = NULL; /* Poison */
- /* Because we reserve afterwards. */
- skb_put(new_skb, (1664 + RX_OFFSET));
- rxb = (struct ioc3_erxbuf *)new_skb->data;
- skb_reserve(new_skb, RX_OFFSET);
-
dev->stats.rx_packets++; /* Statistics */
dev->stats.rx_bytes += len;
} else {
@@ -667,7 +660,11 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
ioc3_clean_tx_ring(ip);
ioc3_init(dev);
- ioc3_alloc_rx_bufs(dev);
+ if (ioc3_alloc_rx_bufs(dev)) {
+ netdev_err(dev, "%s: rx buffer allocation failed\n", __func__);
+ spin_unlock(&ip->ioc3_lock);
+ return;
+ }
ioc3_start(ip);
ioc3_mii_init(ip);
@@ -804,7 +801,7 @@ static void ioc3_free_rx_bufs(struct ioc3_private *ip)
}
}
-static void ioc3_alloc_rx_bufs(struct net_device *dev)
+static int ioc3_alloc_rx_bufs(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
struct ioc3_erxbuf *rxb;
@@ -815,25 +812,16 @@ static void ioc3_alloc_rx_bufs(struct net_device *dev)
* this for performance and memory later.
*/
for (i = 0; i < RX_BUFFS; i++) {
- struct sk_buff *skb;
-
- skb = ioc3_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC);
- if (!skb) {
- show_free_areas(0, NULL);
- continue;
- }
-
- ip->rx_skbs[i] = skb;
+ if (ioc3_alloc_skb(&ip->rx_skbs[i], &rxb))
+ return -ENOMEM;
- /* Because we reserve afterwards. */
- skb_put(skb, (1664 + RX_OFFSET));
- rxb = (struct ioc3_erxbuf *)skb->data;
rxb->w0 = 0; /* Clear valid flag */
ip->rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
- skb_reserve(skb, RX_OFFSET);
}
ip->rx_ci = 0;
ip->rx_pi = RX_BUFFS;
+
+ return 0;
}
static inline void ioc3_ssram_disc(struct ioc3_private *ip)
@@ -945,7 +933,10 @@ static int ioc3_open(struct net_device *dev)
ip->ehar_l = 0;
ioc3_init(dev);
- ioc3_alloc_rx_bufs(dev);
+ if (ioc3_alloc_rx_bufs(dev)) {
+ netdev_err(dev, "%s: rx buffer allocation failed\n", __func__);
+ return -ENOMEM;
+ }
ioc3_start(ip);
ioc3_mii_start(ip);
@@ -1436,7 +1427,11 @@ static void ioc3_timeout(struct net_device *dev)
ioc3_clean_tx_ring(ip);
ioc3_init(dev);
- ioc3_alloc_rx_bufs(dev);
+ if (ioc3_alloc_rx_bufs(dev)) {
+ netdev_err(dev, "%s: rx buffer allocation failed\n", __func__);
+ spin_unlock_irq(&ip->ioc3_lock);
+ return;
+ }
ioc3_start(ip);
ioc3_mii_init(ip);
ioc3_mii_start(ip);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 02/15] MIPS: SGI-IP27: restructure ioc3 register access
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Break up the big ioc3 register struct into functional pieces to
make use in sub-function drivers more straightforward. And while
doing that get rid of all volatile access by using readX/writeX.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
arch/mips/include/asm/sn/ioc3.h | 357 ++++++++++++------------------
arch/mips/sgi-ip27/ip27-console.c | 5 +-
drivers/net/ethernet/sgi/ioc3-eth.c | 418 ++++++++++++++++--------------------
3 files changed, 331 insertions(+), 449 deletions(-)
diff --git a/arch/mips/include/asm/sn/ioc3.h b/arch/mips/include/asm/sn/ioc3.h
index 25c8dccab51f..a947eed48fee 100644
--- a/arch/mips/include/asm/sn/ioc3.h
+++ b/arch/mips/include/asm/sn/ioc3.h
@@ -3,169 +3,161 @@
* Copyright (C) 1999, 2000 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*/
-#ifndef _IOC3_H
-#define _IOC3_H
+#ifndef MIPS_SN_IOC3_H
+#define MIPS_SN_IOC3_H
#include <linux/types.h>
+/* serial port register map */
+struct ioc3_serialregs {
+ u32 sscr;
+ u32 stpir;
+ u32 stcir;
+ u32 srpir;
+ u32 srcir;
+ u32 srtr;
+ u32 shadow;
+};
+
/* SUPERIO uart register map */
-typedef volatile struct ioc3_uartregs {
+struct ioc3_uartregs {
union {
- volatile u8 rbr; /* read only, DLAB == 0 */
- volatile u8 thr; /* write only, DLAB == 0 */
- volatile u8 dll; /* DLAB == 1 */
- } u1;
+ u8 iu_rbr; /* read only, DLAB == 0 */
+ u8 iu_thr; /* write only, DLAB == 0 */
+ u8 iu_dll; /* DLAB == 1 */
+ };
union {
- volatile u8 ier; /* DLAB == 0 */
- volatile u8 dlm; /* DLAB == 1 */
- } u2;
+ u8 iu_ier; /* DLAB == 0 */
+ u8 iu_dlm; /* DLAB == 1 */
+ };
union {
- volatile u8 iir; /* read only */
- volatile u8 fcr; /* write only */
- } u3;
- volatile u8 iu_lcr;
- volatile u8 iu_mcr;
- volatile u8 iu_lsr;
- volatile u8 iu_msr;
- volatile u8 iu_scr;
-} ioc3_uregs_t;
-
-#define iu_rbr u1.rbr
-#define iu_thr u1.thr
-#define iu_dll u1.dll
-#define iu_ier u2.ier
-#define iu_dlm u2.dlm
-#define iu_iir u3.iir
-#define iu_fcr u3.fcr
+ u8 iu_iir; /* read only */
+ u8 iu_fcr; /* write only */
+ };
+ u8 iu_lcr;
+ u8 iu_mcr;
+ u8 iu_lsr;
+ u8 iu_msr;
+ u8 iu_scr;
+};
struct ioc3_sioregs {
- volatile u8 fill[0x141]; /* starts at 0x141 */
+ u8 fill[0x141]; /* starts at 0x141 */
- volatile u8 uartc;
- volatile u8 kbdcg;
+ u8 uartc;
+ u8 kbdcg;
- volatile u8 fill0[0x150 - 0x142 - 1];
+ u8 fill0[0x150 - 0x142 - 1];
- volatile u8 pp_data;
- volatile u8 pp_dsr;
- volatile u8 pp_dcr;
+ u8 pp_data;
+ u8 pp_dsr;
+ u8 pp_dcr;
- volatile u8 fill1[0x158 - 0x152 - 1];
+ u8 fill1[0x158 - 0x152 - 1];
- volatile u8 pp_fifa;
- volatile u8 pp_cfgb;
- volatile u8 pp_ecr;
+ u8 pp_fifa;
+ u8 pp_cfgb;
+ u8 pp_ecr;
- volatile u8 fill2[0x168 - 0x15a - 1];
+ u8 fill2[0x168 - 0x15a - 1];
- volatile u8 rtcad;
- volatile u8 rtcdat;
+ u8 rtcad;
+ u8 rtcdat;
- volatile u8 fill3[0x170 - 0x169 - 1];
+ u8 fill3[0x170 - 0x169 - 1];
struct ioc3_uartregs uartb; /* 0x20170 */
struct ioc3_uartregs uarta; /* 0x20178 */
};
+struct ioc3_ethregs {
+ u32 emcr; /* 0x000f0 */
+ u32 eisr; /* 0x000f4 */
+ u32 eier; /* 0x000f8 */
+ u32 ercsr; /* 0x000fc */
+ u32 erbr_h; /* 0x00100 */
+ u32 erbr_l; /* 0x00104 */
+ u32 erbar; /* 0x00108 */
+ u32 ercir; /* 0x0010c */
+ u32 erpir; /* 0x00110 */
+ u32 ertr; /* 0x00114 */
+ u32 etcsr; /* 0x00118 */
+ u32 ersr; /* 0x0011c */
+ u32 etcdc; /* 0x00120 */
+ u32 ebir; /* 0x00124 */
+ u32 etbr_h; /* 0x00128 */
+ u32 etbr_l; /* 0x0012c */
+ u32 etcir; /* 0x00130 */
+ u32 etpir; /* 0x00134 */
+ u32 emar_h; /* 0x00138 */
+ u32 emar_l; /* 0x0013c */
+ u32 ehar_h; /* 0x00140 */
+ u32 ehar_l; /* 0x00144 */
+ u32 micr; /* 0x00148 */
+ u32 midr_r; /* 0x0014c */
+ u32 midr_w; /* 0x00150 */
+};
+
+struct ioc3_serioregs {
+ u32 km_csr; /* 0x0009c */
+ u32 k_rd; /* 0x000a0 */
+ u32 m_rd; /* 0x000a4 */
+ u32 k_wd; /* 0x000a8 */
+ u32 m_wd; /* 0x000ac */
+};
+
/* Register layout of IOC3 in configuration space. */
struct ioc3 {
- volatile u32 pad0[7]; /* 0x00000 */
- volatile u32 sio_ir; /* 0x0001c */
- volatile u32 sio_ies; /* 0x00020 */
- volatile u32 sio_iec; /* 0x00024 */
- volatile u32 sio_cr; /* 0x00028 */
- volatile u32 int_out; /* 0x0002c */
- volatile u32 mcr; /* 0x00030 */
+ /* PCI Config Space registers */
+ u32 pci_id; /* 0x00000 */
+ u32 pci_scr; /* 0x00004 */
+ u32 pci_rev; /* 0x00008 */
+ u32 pci_lat; /* 0x0000c */
+ u32 pci_addr; /* 0x00010 */
+ u32 pci_err_addr_l; /* 0x00014 */
+ u32 pci_err_addr_h; /* 0x00018 */
+
+ u32 sio_ir; /* 0x0001c */
+ u32 sio_ies; /* 0x00020 */
+ u32 sio_iec; /* 0x00024 */
+ u32 sio_cr; /* 0x00028 */
+ u32 int_out; /* 0x0002c */
+ u32 mcr; /* 0x00030 */
/* General Purpose I/O registers */
- volatile u32 gpcr_s; /* 0x00034 */
- volatile u32 gpcr_c; /* 0x00038 */
- volatile u32 gpdr; /* 0x0003c */
- volatile u32 gppr_0; /* 0x00040 */
- volatile u32 gppr_1; /* 0x00044 */
- volatile u32 gppr_2; /* 0x00048 */
- volatile u32 gppr_3; /* 0x0004c */
- volatile u32 gppr_4; /* 0x00050 */
- volatile u32 gppr_5; /* 0x00054 */
- volatile u32 gppr_6; /* 0x00058 */
- volatile u32 gppr_7; /* 0x0005c */
- volatile u32 gppr_8; /* 0x00060 */
- volatile u32 gppr_9; /* 0x00064 */
- volatile u32 gppr_10; /* 0x00068 */
- volatile u32 gppr_11; /* 0x0006c */
- volatile u32 gppr_12; /* 0x00070 */
- volatile u32 gppr_13; /* 0x00074 */
- volatile u32 gppr_14; /* 0x00078 */
- volatile u32 gppr_15; /* 0x0007c */
+ u32 gpcr_s; /* 0x00034 */
+ u32 gpcr_c; /* 0x00038 */
+ u32 gpdr; /* 0x0003c */
+ u32 gppr[16]; /* 0x00040 */
/* Parallel Port Registers */
- volatile u32 ppbr_h_a; /* 0x00080 */
- volatile u32 ppbr_l_a; /* 0x00084 */
- volatile u32 ppcr_a; /* 0x00088 */
- volatile u32 ppcr; /* 0x0008c */
- volatile u32 ppbr_h_b; /* 0x00090 */
- volatile u32 ppbr_l_b; /* 0x00094 */
- volatile u32 ppcr_b; /* 0x00098 */
+ u32 ppbr_h_a; /* 0x00080 */
+ u32 ppbr_l_a; /* 0x00084 */
+ u32 ppcr_a; /* 0x00088 */
+ u32 ppcr; /* 0x0008c */
+ u32 ppbr_h_b; /* 0x00090 */
+ u32 ppbr_l_b; /* 0x00094 */
+ u32 ppcr_b; /* 0x00098 */
/* Keyboard and Mouse Registers */
- volatile u32 km_csr; /* 0x0009c */
- volatile u32 k_rd; /* 0x000a0 */
- volatile u32 m_rd; /* 0x000a4 */
- volatile u32 k_wd; /* 0x000a8 */
- volatile u32 m_wd; /* 0x000ac */
+ struct ioc3_serioregs serio;
/* Serial Port Registers */
- volatile u32 sbbr_h; /* 0x000b0 */
- volatile u32 sbbr_l; /* 0x000b4 */
- volatile u32 sscr_a; /* 0x000b8 */
- volatile u32 stpir_a; /* 0x000bc */
- volatile u32 stcir_a; /* 0x000c0 */
- volatile u32 srpir_a; /* 0x000c4 */
- volatile u32 srcir_a; /* 0x000c8 */
- volatile u32 srtr_a; /* 0x000cc */
- volatile u32 shadow_a; /* 0x000d0 */
- volatile u32 sscr_b; /* 0x000d4 */
- volatile u32 stpir_b; /* 0x000d8 */
- volatile u32 stcir_b; /* 0x000dc */
- volatile u32 srpir_b; /* 0x000e0 */
- volatile u32 srcir_b; /* 0x000e4 */
- volatile u32 srtr_b; /* 0x000e8 */
- volatile u32 shadow_b; /* 0x000ec */
-
- /* Ethernet Registers */
- volatile u32 emcr; /* 0x000f0 */
- volatile u32 eisr; /* 0x000f4 */
- volatile u32 eier; /* 0x000f8 */
- volatile u32 ercsr; /* 0x000fc */
- volatile u32 erbr_h; /* 0x00100 */
- volatile u32 erbr_l; /* 0x00104 */
- volatile u32 erbar; /* 0x00108 */
- volatile u32 ercir; /* 0x0010c */
- volatile u32 erpir; /* 0x00110 */
- volatile u32 ertr; /* 0x00114 */
- volatile u32 etcsr; /* 0x00118 */
- volatile u32 ersr; /* 0x0011c */
- volatile u32 etcdc; /* 0x00120 */
- volatile u32 ebir; /* 0x00124 */
- volatile u32 etbr_h; /* 0x00128 */
- volatile u32 etbr_l; /* 0x0012c */
- volatile u32 etcir; /* 0x00130 */
- volatile u32 etpir; /* 0x00134 */
- volatile u32 emar_h; /* 0x00138 */
- volatile u32 emar_l; /* 0x0013c */
- volatile u32 ehar_h; /* 0x00140 */
- volatile u32 ehar_l; /* 0x00144 */
- volatile u32 micr; /* 0x00148 */
- volatile u32 midr_r; /* 0x0014c */
- volatile u32 midr_w; /* 0x00150 */
- volatile u32 pad1[(0x20000 - 0x00154) / 4];
+ u32 sbbr_h; /* 0x000b0 */
+ u32 sbbr_l; /* 0x000b4 */
+ struct ioc3_serialregs port_a;
+ struct ioc3_serialregs port_b;
+
+ /* Ethernet Registers */
+ struct ioc3_ethregs eth;
+ u32 pad1[(0x20000 - 0x00154) / 4];
/* SuperIO Registers XXX */
struct ioc3_sioregs sregs; /* 0x20000 */
- volatile u32 pad2[(0x40000 - 0x20180) / 4];
+ u32 pad2[(0x40000 - 0x20180) / 4];
/* SSRAM Diagnostic Access */
- volatile u32 ssram[(0x80000 - 0x40000) / 4];
+ u32 ssram[(0x80000 - 0x40000) / 4];
/* Bytebus device offsets
0x80000 - Access to the generic devices selected with DEV0
@@ -178,6 +170,20 @@ struct ioc3 {
0xFFFFF bytebus DEV_SEL_3 */
};
+
+#define PCI_LAT 0xc /* Latency Timer */
+#define PCI_SCR_DROP_MODE_EN 0x00008000 /* drop pios on parity err */
+#define UARTA_BASE 0x178
+#define UARTB_BASE 0x170
+
+/*
+ * Bytebus device space
+ */
+#define IOC3_BYTEBUS_DEV0 0x80000L
+#define IOC3_BYTEBUS_DEV1 0xa0000L
+#define IOC3_BYTEBUS_DEV2 0xc0000L
+#define IOC3_BYTEBUS_DEV3 0xe0000L
+
/*
* Ethernet RX Buffer
*/
@@ -233,28 +239,20 @@ struct ioc3_etxd {
#define ETXD_B2CNT_MASK 0x7ff00000
#define ETXD_B2CNT_SHIFT 20
-/*
- * Bytebus device space
- */
-#define IOC3_BYTEBUS_DEV0 0x80000L
-#define IOC3_BYTEBUS_DEV1 0xa0000L
-#define IOC3_BYTEBUS_DEV2 0xc0000L
-#define IOC3_BYTEBUS_DEV3 0xe0000L
-
/* ------------------------------------------------------------------------- */
/* Superio Registers (PIO Access) */
#define IOC3_SIO_BASE 0x20000
#define IOC3_SIO_UARTC (IOC3_SIO_BASE+0x141) /* UART Config */
#define IOC3_SIO_KBDCG (IOC3_SIO_BASE+0x142) /* KBD Config */
-#define IOC3_SIO_PP_BASE (IOC3_SIO_BASE+PP_BASE) /* Parallel Port */
+#define IOC3_SIO_PP_BASE (IOC3_SIO_BASE+PP_BASE) /* Parallel Port */
#define IOC3_SIO_RTC_BASE (IOC3_SIO_BASE+0x168) /* Real Time Clock */
#define IOC3_SIO_UB_BASE (IOC3_SIO_BASE+UARTB_BASE) /* UART B */
#define IOC3_SIO_UA_BASE (IOC3_SIO_BASE+UARTA_BASE) /* UART A */
/* SSRAM Diagnostic Access */
#define IOC3_SSRAM IOC3_RAM_OFF /* base of SSRAM diagnostic access */
-#define IOC3_SSRAM_LEN 0x40000 /* 256kb (address space size, may not be fully populated) */
+#define IOC3_SSRAM_LEN 0x40000 /* 256kb (addrspc sz, may not be populated) */
#define IOC3_SSRAM_DM 0x0000ffff /* data mask */
#define IOC3_SSRAM_PM 0x00010000 /* parity mask */
@@ -294,10 +292,10 @@ struct ioc3_etxd {
SIO_IR to assert */
#define KM_CSR_M_TO_EN 0x00080000 /* KM_CSR_M_TO + KM_CSR_M_TO_EN = cause
SIO_IR to assert */
-#define KM_CSR_K_CLAMP_ONE 0x00100000 /* Pull K_CLK low after rec. one char */
-#define KM_CSR_M_CLAMP_ONE 0x00200000 /* Pull M_CLK low after rec. one char */
-#define KM_CSR_K_CLAMP_THREE 0x00400000 /* Pull K_CLK low after rec. three chars */
-#define KM_CSR_M_CLAMP_THREE 0x00800000 /* Pull M_CLK low after rec. three char */
+#define KM_CSR_K_CLAMP_1 0x00100000 /* Pull K_CLK low aft recv 1 char */
+#define KM_CSR_M_CLAMP_1 0x00200000 /* Pull M_CLK low aft recv 1 char */
+#define KM_CSR_K_CLAMP_3 0x00400000 /* Pull K_CLK low aft recv 3 chars */
+#define KM_CSR_M_CLAMP_3 0x00800000 /* Pull M_CLK low aft recv 3 chars */
/* bitmasks for IOC3_K_RD and IOC3_M_RD */
#define KM_RD_DATA_2 0x000000ff /* 3rd char recvd since last read */
@@ -440,10 +438,6 @@ struct ioc3_etxd {
SIO_IR_PP_INTB | SIO_IR_PP_MEMERR)
#define SIO_IR_RT (SIO_IR_RT_INT | SIO_IR_GEN_INT1)
-/* macro to load pending interrupts */
-#define IOC3_PENDING_INTRS(mem) (PCI_INW(&((mem)->sio_ir)) & \
- PCI_INW(&((mem)->sio_ies_ro)))
-
/* bitmasks for SIO_CR */
#define SIO_CR_SIO_RESET 0x00000001 /* reset the SIO */
#define SIO_CR_SER_A_BASE 0x000000fe /* DMA poll addr port A */
@@ -500,10 +494,11 @@ struct ioc3_etxd {
#define GPCR_UARTB_MODESEL 0x40 /* pin is output to port B mode sel */
#define GPCR_UARTA_MODESEL 0x80 /* pin is output to port A mode sel */
-#define GPPR_PHY_RESET_PIN 5 /* GIO pin controlling phy reset */
-#define GPPR_UARTB_MODESEL_PIN 6 /* GIO pin controlling uart b mode select */
-#define GPPR_UARTA_MODESEL_PIN 7 /* GIO pin controlling uart a mode select */
+#define GPPR_PHY_RESET_PIN 5 /* GIO pin cntrlling phy reset */
+#define GPPR_UARTB_MODESEL_PIN 6 /* GIO pin cntrlling uart b mode sel */
+#define GPPR_UARTA_MODESEL_PIN 7 /* GIO pin cntrlling uart a mode sel */
+/* ethernet */
#define EMCR_DUPLEX 0x00000001
#define EMCR_PROMISC 0x00000002
#define EMCR_PADEN 0x00000004
@@ -595,70 +590,4 @@ struct ioc3_etxd {
#define MIDR_DATA_MASK 0x0000ffff
-#define ERXBUF_IPCKSUM_MASK 0x0000ffff
-#define ERXBUF_BYTECNT_MASK 0x07ff0000
-#define ERXBUF_BYTECNT_SHIFT 16
-#define ERXBUF_V 0x80000000
-
-#define ERXBUF_CRCERR 0x00000001 /* aka RSV15 */
-#define ERXBUF_FRAMERR 0x00000002 /* aka RSV14 */
-#define ERXBUF_CODERR 0x00000004 /* aka RSV13 */
-#define ERXBUF_INVPREAMB 0x00000008 /* aka RSV18 */
-#define ERXBUF_LOLEN 0x00007000 /* aka RSV2_0 */
-#define ERXBUF_HILEN 0x03ff0000 /* aka RSV12_3 */
-#define ERXBUF_MULTICAST 0x04000000 /* aka RSV16 */
-#define ERXBUF_BROADCAST 0x08000000 /* aka RSV17 */
-#define ERXBUF_LONGEVENT 0x10000000 /* aka RSV19 */
-#define ERXBUF_BADPKT 0x20000000 /* aka RSV20 */
-#define ERXBUF_GOODPKT 0x40000000 /* aka RSV21 */
-#define ERXBUF_CARRIER 0x80000000 /* aka RSV22 */
-
-#define ETXD_BYTECNT_MASK 0x000007ff /* total byte count */
-#define ETXD_INTWHENDONE 0x00001000 /* intr when done */
-#define ETXD_D0V 0x00010000 /* data 0 valid */
-#define ETXD_B1V 0x00020000 /* buf 1 valid */
-#define ETXD_B2V 0x00040000 /* buf 2 valid */
-#define ETXD_DOCHECKSUM 0x00080000 /* insert ip cksum */
-#define ETXD_CHKOFF_MASK 0x07f00000 /* cksum byte offset */
-#define ETXD_CHKOFF_SHIFT 20
-
-#define ETXD_D0CNT_MASK 0x0000007f
-#define ETXD_B1CNT_MASK 0x0007ff00
-#define ETXD_B1CNT_SHIFT 8
-#define ETXD_B2CNT_MASK 0x7ff00000
-#define ETXD_B2CNT_SHIFT 20
-
-typedef enum ioc3_subdevs_e {
- ioc3_subdev_ether,
- ioc3_subdev_generic,
- ioc3_subdev_nic,
- ioc3_subdev_kbms,
- ioc3_subdev_ttya,
- ioc3_subdev_ttyb,
- ioc3_subdev_ecpp,
- ioc3_subdev_rt,
- ioc3_nsubdevs
-} ioc3_subdev_t;
-
-/* subdevice disable bits,
- * from the standard INFO_LBL_SUBDEVS
- */
-#define IOC3_SDB_ETHER (1<<ioc3_subdev_ether)
-#define IOC3_SDB_GENERIC (1<<ioc3_subdev_generic)
-#define IOC3_SDB_NIC (1<<ioc3_subdev_nic)
-#define IOC3_SDB_KBMS (1<<ioc3_subdev_kbms)
-#define IOC3_SDB_TTYA (1<<ioc3_subdev_ttya)
-#define IOC3_SDB_TTYB (1<<ioc3_subdev_ttyb)
-#define IOC3_SDB_ECPP (1<<ioc3_subdev_ecpp)
-#define IOC3_SDB_RT (1<<ioc3_subdev_rt)
-
-#define IOC3_ALL_SUBDEVS ((1<<ioc3_nsubdevs)-1)
-
-#define IOC3_SDB_SERIAL (IOC3_SDB_TTYA|IOC3_SDB_TTYB)
-
-#define IOC3_STD_SUBDEVS IOC3_ALL_SUBDEVS
-
-#define IOC3_INTA_SUBDEVS IOC3_SDB_ETHER
-#define IOC3_INTB_SUBDEVS (IOC3_SDB_GENERIC|IOC3_SDB_KBMS|IOC3_SDB_SERIAL|IOC3_SDB_ECPP|IOC3_SDB_RT)
-
-#endif /* _IOC3_H */
+#endif /* MIPS_SN_IOC3_H */
diff --git a/arch/mips/sgi-ip27/ip27-console.c b/arch/mips/sgi-ip27/ip27-console.c
index 6bdb48d41276..5886bee89d06 100644
--- a/arch/mips/sgi-ip27/ip27-console.c
+++ b/arch/mips/sgi-ip27/ip27-console.c
@@ -35,6 +35,7 @@ void prom_putchar(char c)
{
struct ioc3_uartregs *uart = console_uart();
- while ((uart->iu_lsr & 0x20) == 0);
- uart->iu_thr = c;
+ while ((readb(&uart->iu_lsr) & 0x20) == 0)
+ ;
+ writeb(c, &uart->iu_thr);
}
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 358e66b81926..713d2472cb97 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -76,7 +76,9 @@
/* Private per NIC data of the driver. */
struct ioc3_private {
- struct ioc3 *regs;
+ struct ioc3_ethregs *regs;
+ struct ioc3 *all_regs;
+ u32 *ssram;
unsigned long *rxr; /* pointer to receiver ring */
struct ioc3_etxd *txr;
struct sk_buff *rx_skbs[512];
@@ -156,128 +158,67 @@ static inline unsigned long ioc3_map(void *ptr, unsigned long vdev)
#define IOC3_SIZE 0x100000
-/*
- * IOC3 is a big endian device
- *
- * Unorthodox but makes the users of these macros more readable - the pointer
- * to the IOC3's memory mapped registers is expected as struct ioc3 * ioc3
- * in the environment.
- */
-#define ioc3_r_mcr() be32_to_cpu(ioc3->mcr)
-#define ioc3_w_mcr(v) do { ioc3->mcr = cpu_to_be32(v); } while (0)
-#define ioc3_w_gpcr_s(v) do { ioc3->gpcr_s = cpu_to_be32(v); } while (0)
-#define ioc3_r_emcr() be32_to_cpu(ioc3->emcr)
-#define ioc3_w_emcr(v) do { ioc3->emcr = cpu_to_be32(v); } while (0)
-#define ioc3_r_eisr() be32_to_cpu(ioc3->eisr)
-#define ioc3_w_eisr(v) do { ioc3->eisr = cpu_to_be32(v); } while (0)
-#define ioc3_r_eier() be32_to_cpu(ioc3->eier)
-#define ioc3_w_eier(v) do { ioc3->eier = cpu_to_be32(v); } while (0)
-#define ioc3_r_ercsr() be32_to_cpu(ioc3->ercsr)
-#define ioc3_w_ercsr(v) do { ioc3->ercsr = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbr_h() be32_to_cpu(ioc3->erbr_h)
-#define ioc3_w_erbr_h(v) do { ioc3->erbr_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbr_l() be32_to_cpu(ioc3->erbr_l)
-#define ioc3_w_erbr_l(v) do { ioc3->erbr_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_erbar() be32_to_cpu(ioc3->erbar)
-#define ioc3_w_erbar(v) do { ioc3->erbar = cpu_to_be32(v); } while (0)
-#define ioc3_r_ercir() be32_to_cpu(ioc3->ercir)
-#define ioc3_w_ercir(v) do { ioc3->ercir = cpu_to_be32(v); } while (0)
-#define ioc3_r_erpir() be32_to_cpu(ioc3->erpir)
-#define ioc3_w_erpir(v) do { ioc3->erpir = cpu_to_be32(v); } while (0)
-#define ioc3_r_ertr() be32_to_cpu(ioc3->ertr)
-#define ioc3_w_ertr(v) do { ioc3->ertr = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcsr() be32_to_cpu(ioc3->etcsr)
-#define ioc3_w_etcsr(v) do { ioc3->etcsr = cpu_to_be32(v); } while (0)
-#define ioc3_r_ersr() be32_to_cpu(ioc3->ersr)
-#define ioc3_w_ersr(v) do { ioc3->ersr = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcdc() be32_to_cpu(ioc3->etcdc)
-#define ioc3_w_etcdc(v) do { ioc3->etcdc = cpu_to_be32(v); } while (0)
-#define ioc3_r_ebir() be32_to_cpu(ioc3->ebir)
-#define ioc3_w_ebir(v) do { ioc3->ebir = cpu_to_be32(v); } while (0)
-#define ioc3_r_etbr_h() be32_to_cpu(ioc3->etbr_h)
-#define ioc3_w_etbr_h(v) do { ioc3->etbr_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_etbr_l() be32_to_cpu(ioc3->etbr_l)
-#define ioc3_w_etbr_l(v) do { ioc3->etbr_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_etcir() be32_to_cpu(ioc3->etcir)
-#define ioc3_w_etcir(v) do { ioc3->etcir = cpu_to_be32(v); } while (0)
-#define ioc3_r_etpir() be32_to_cpu(ioc3->etpir)
-#define ioc3_w_etpir(v) do { ioc3->etpir = cpu_to_be32(v); } while (0)
-#define ioc3_r_emar_h() be32_to_cpu(ioc3->emar_h)
-#define ioc3_w_emar_h(v) do { ioc3->emar_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_emar_l() be32_to_cpu(ioc3->emar_l)
-#define ioc3_w_emar_l(v) do { ioc3->emar_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_ehar_h() be32_to_cpu(ioc3->ehar_h)
-#define ioc3_w_ehar_h(v) do { ioc3->ehar_h = cpu_to_be32(v); } while (0)
-#define ioc3_r_ehar_l() be32_to_cpu(ioc3->ehar_l)
-#define ioc3_w_ehar_l(v) do { ioc3->ehar_l = cpu_to_be32(v); } while (0)
-#define ioc3_r_micr() be32_to_cpu(ioc3->micr)
-#define ioc3_w_micr(v) do { ioc3->micr = cpu_to_be32(v); } while (0)
-#define ioc3_r_midr_r() be32_to_cpu(ioc3->midr_r)
-#define ioc3_w_midr_r(v) do { ioc3->midr_r = cpu_to_be32(v); } while (0)
-#define ioc3_r_midr_w() be32_to_cpu(ioc3->midr_w)
-#define ioc3_w_midr_w(v) do { ioc3->midr_w = cpu_to_be32(v); } while (0)
-
static inline u32 mcr_pack(u32 pulse, u32 sample)
{
return (pulse << 10) | (sample << 2);
}
-static int nic_wait(struct ioc3 *ioc3)
+static int nic_wait(u32 __iomem *mcr)
{
- u32 mcr;
+ u32 m;
- do {
- mcr = ioc3_r_mcr();
- } while (!(mcr & 2));
+ do {
+ m = readl(mcr);
+ } while (!(m & 2));
- return mcr & 1;
+ return m & 1;
}
-static int nic_reset(struct ioc3 *ioc3)
+static int nic_reset(u32 __iomem *mcr)
{
int presence;
- ioc3_w_mcr(mcr_pack(500, 65));
- presence = nic_wait(ioc3);
+ writel(mcr_pack(500, 65), mcr);
+ presence = nic_wait(mcr);
- ioc3_w_mcr(mcr_pack(0, 500));
- nic_wait(ioc3);
+ writel(mcr_pack(0, 500), mcr);
+ nic_wait(mcr);
return presence;
}
-static inline int nic_read_bit(struct ioc3 *ioc3)
+static inline int nic_read_bit(u32 __iomem *mcr)
{
int result;
- ioc3_w_mcr(mcr_pack(6, 13));
- result = nic_wait(ioc3);
- ioc3_w_mcr(mcr_pack(0, 100));
- nic_wait(ioc3);
+ writel(mcr_pack(6, 13), mcr);
+ result = nic_wait(mcr);
+ writel(mcr_pack(0, 100), mcr);
+ nic_wait(mcr);
return result;
}
-static inline void nic_write_bit(struct ioc3 *ioc3, int bit)
+static inline void nic_write_bit(u32 __iomem *mcr, int bit)
{
if (bit)
- ioc3_w_mcr(mcr_pack(6, 110));
+ writel(mcr_pack(6, 110), mcr);
else
- ioc3_w_mcr(mcr_pack(80, 30));
+ writel(mcr_pack(80, 30), mcr);
- nic_wait(ioc3);
+ nic_wait(mcr);
}
/*
* Read a byte from an iButton device
*/
-static u32 nic_read_byte(struct ioc3 *ioc3)
+static u32 nic_read_byte(u32 __iomem *mcr)
{
u32 result = 0;
int i;
for (i = 0; i < 8; i++)
- result = (result >> 1) | (nic_read_bit(ioc3) << 7);
+ result = (result >> 1) | (nic_read_bit(mcr) << 7);
return result;
}
@@ -285,7 +226,7 @@ static u32 nic_read_byte(struct ioc3 *ioc3)
/*
* Write a byte to an iButton device
*/
-static void nic_write_byte(struct ioc3 *ioc3, int byte)
+static void nic_write_byte(u32 __iomem *mcr, int byte)
{
int i, bit;
@@ -293,23 +234,23 @@ static void nic_write_byte(struct ioc3 *ioc3, int byte)
bit = byte & 1;
byte >>= 1;
- nic_write_bit(ioc3, bit);
+ nic_write_bit(mcr, bit);
}
}
-static u64 nic_find(struct ioc3 *ioc3, int *last)
+static u64 nic_find(u32 __iomem *mcr, int *last)
{
int a, b, index, disc;
u64 address = 0;
- nic_reset(ioc3);
+ nic_reset(mcr);
/* Search ROM. */
- nic_write_byte(ioc3, 0xf0);
+ nic_write_byte(mcr, 0xf0);
/* Algorithm from ``Book of iButton Standards''. */
for (index = 0, disc = 0; index < 64; index++) {
- a = nic_read_bit(ioc3);
- b = nic_read_bit(ioc3);
+ a = nic_read_bit(mcr);
+ b = nic_read_bit(mcr);
if (a && b) {
printk("NIC search failed (not fatal).\n");
@@ -325,14 +266,14 @@ static u64 nic_find(struct ioc3 *ioc3, int *last)
disc = index;
} else if ((address & (1UL << index)) == 0)
disc = index;
- nic_write_bit(ioc3, address & (1UL << index));
+ nic_write_bit(mcr, address & (1UL << index));
continue;
} else {
if (a)
address |= 1UL << index;
else
address &= ~(1UL << index);
- nic_write_bit(ioc3, a);
+ nic_write_bit(mcr, a);
continue;
}
}
@@ -342,7 +283,7 @@ static u64 nic_find(struct ioc3 *ioc3, int *last)
return address;
}
-static int nic_init(struct ioc3 *ioc3)
+static int nic_init(u32 __iomem *mcr)
{
const char *unknown = "unknown";
const char *type = unknown;
@@ -352,7 +293,7 @@ static int nic_init(struct ioc3 *ioc3)
while (1) {
u64 reg;
- reg = nic_find(ioc3, &save);
+ reg = nic_find(mcr, &save);
switch (reg & 0xff) {
case 0x91:
@@ -366,12 +307,12 @@ static int nic_init(struct ioc3 *ioc3)
continue;
}
- nic_reset(ioc3);
+ nic_reset(mcr);
/* Match ROM. */
- nic_write_byte(ioc3, 0x55);
+ nic_write_byte(mcr, 0x55);
for (i = 0; i < 8; i++)
- nic_write_byte(ioc3, (reg >> (i << 3)) & 0xff);
+ nic_write_byte(mcr, (reg >> (i << 3)) & 0xff);
reg >>= 8; /* Shift out type. */
for (i = 0; i < 6; i++) {
@@ -396,15 +337,15 @@ static int nic_init(struct ioc3 *ioc3)
*/
static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
{
- struct ioc3 *ioc3 = ip->regs;
- u8 nic[14];
+ u32 __iomem *mcr = &ip->all_regs->mcr;
int tries = 2; /* There may be some problem with the battery? */
+ u8 nic[14];
int i;
- ioc3_w_gpcr_s(1 << 21);
+ writel(1 << 21, &ip->all_regs->gpcr_s);
while (tries--) {
- if (!nic_init(ioc3))
+ if (!nic_init(mcr))
break;
udelay(500);
}
@@ -415,12 +356,12 @@ static void ioc3_get_eaddr_nic(struct ioc3_private *ip)
}
/* Read Memory. */
- nic_write_byte(ioc3, 0xf0);
- nic_write_byte(ioc3, 0x00);
- nic_write_byte(ioc3, 0x00);
+ nic_write_byte(mcr, 0xf0);
+ nic_write_byte(mcr, 0x00);
+ nic_write_byte(mcr, 0x00);
for (i = 13; i >= 0; i--)
- nic[i] = nic_read_byte(ioc3);
+ nic[i] = nic_read_byte(mcr);
for (i = 2; i < 8; i++)
ip->dev->dev_addr[i - 2] = nic[i];
@@ -441,11 +382,15 @@ static void ioc3_get_eaddr(struct ioc3_private *ip)
static void __ioc3_set_mac_address(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
- ioc3_w_emar_h((dev->dev_addr[5] << 8) | dev->dev_addr[4]);
- ioc3_w_emar_l((dev->dev_addr[3] << 24) | (dev->dev_addr[2] << 16) |
- (dev->dev_addr[1] << 8) | dev->dev_addr[0]);
+ writel((dev->dev_addr[5] << 8) |
+ dev->dev_addr[4],
+ &ip->regs->emar_h);
+ writel((dev->dev_addr[3] << 24) |
+ (dev->dev_addr[2] << 16) |
+ (dev->dev_addr[1] << 8) |
+ dev->dev_addr[0],
+ &ip->regs->emar_l);
}
static int ioc3_set_mac_address(struct net_device *dev, void *addr)
@@ -469,24 +414,29 @@ static int ioc3_set_mac_address(struct net_device *dev, void *addr)
static int ioc3_mdio_read(struct net_device *dev, int phy, int reg)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
- while (ioc3_r_micr() & MICR_BUSY);
- ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG);
- while (ioc3_r_micr() & MICR_BUSY);
+ while (readl(®s->micr) & MICR_BUSY)
+ ;
+ writel((phy << MICR_PHYADDR_SHIFT) | reg | MICR_READTRIG,
+ ®s->micr);
+ while (readl(®s->micr) & MICR_BUSY)
+ ;
- return ioc3_r_midr_r() & MIDR_DATA_MASK;
+ return readl(®s->midr_r) & MIDR_DATA_MASK;
}
static void ioc3_mdio_write(struct net_device *dev, int phy, int reg, int data)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
-
- while (ioc3_r_micr() & MICR_BUSY);
- ioc3_w_midr_w(data);
- ioc3_w_micr((phy << MICR_PHYADDR_SHIFT) | reg);
- while (ioc3_r_micr() & MICR_BUSY);
+ struct ioc3_ethregs *regs = ip->regs;
+
+ while (readl(®s->micr) & MICR_BUSY)
+ ;
+ writel(data, ®s->midr_w);
+ writel((phy << MICR_PHYADDR_SHIFT) | reg, ®s->micr);
+ while (readl(®s->micr) & MICR_BUSY)
+ ;
}
static int ioc3_mii_init(struct ioc3_private *ip);
@@ -494,9 +444,9 @@ static int ioc3_mii_init(struct ioc3_private *ip);
static struct net_device_stats *ioc3_get_stats(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
- dev->stats.collisions += (ioc3_r_etcdc() & ETCDC_COLLCNT_MASK);
+ dev->stats.collisions += readl(®s->etcdc) & ETCDC_COLLCNT_MASK;
return &dev->stats;
}
@@ -572,7 +522,6 @@ static inline void ioc3_rx(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
struct sk_buff *skb, *new_skb;
- struct ioc3 *ioc3 = ip->regs;
int rx_entry, n_entry, len;
struct ioc3_erxbuf *rxb;
unsigned long *rxr;
@@ -640,7 +589,7 @@ static inline void ioc3_rx(struct net_device *dev)
rxb = (struct ioc3_erxbuf *) (skb->data - RX_OFFSET);
w0 = be32_to_cpu(rxb->w0);
}
- ioc3_w_erpir((n_entry << 3) | ERPIR_ARM);
+ writel((n_entry << 3) | ERPIR_ARM, &ip->regs->erpir);
ip->rx_pi = n_entry;
ip->rx_ci = rx_entry;
}
@@ -648,14 +597,14 @@ static inline void ioc3_rx(struct net_device *dev)
static inline void ioc3_tx(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
+ struct ioc3_ethregs *regs = ip->regs;
unsigned long packets, bytes;
- struct ioc3 *ioc3 = ip->regs;
int tx_entry, o_entry;
struct sk_buff *skb;
u32 etcir;
spin_lock(&ip->ioc3_lock);
- etcir = ioc3_r_etcir();
+ etcir = readl(®s->etcir);
tx_entry = (etcir >> 7) & 127;
o_entry = ip->tx_ci;
@@ -671,7 +620,7 @@ static inline void ioc3_tx(struct net_device *dev)
o_entry = (o_entry + 1) & 127; /* Next */
- etcir = ioc3_r_etcir(); /* More pkts sent? */
+ etcir = readl(®s->etcir); /* More pkts sent? */
tx_entry = (etcir >> 7) & 127;
}
@@ -724,44 +673,39 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
/* The interrupt handler does all of the Rx thread work and cleans up
after the Tx thread. */
-static irqreturn_t ioc3_interrupt(int irq, void *_dev)
+static irqreturn_t ioc3_interrupt(int irq, void *dev_id)
{
- struct net_device *dev = (struct net_device *)_dev;
- struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
- const u32 enabled = EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
- EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
- EISR_TXEXPLICIT | EISR_TXMEMERR;
+ struct ioc3_private *ip = netdev_priv(dev_id);
+ struct ioc3_ethregs *regs = ip->regs;
u32 eisr;
- eisr = ioc3_r_eisr() & enabled;
-
- ioc3_w_eisr(eisr);
- (void) ioc3_r_eisr(); /* Flush */
+ eisr = readl(®s->eisr);
+ writel(eisr, ®s->eisr);
+ readl(®s->eisr); /* Flush */
if (eisr & (EISR_RXOFLO | EISR_RXBUFOFLO | EISR_RXMEMERR |
EISR_RXPARERR | EISR_TXBUFUFLO | EISR_TXMEMERR))
- ioc3_error(dev, eisr);
+ ioc3_error(dev_id, eisr);
if (eisr & EISR_RXTIMERINT)
- ioc3_rx(dev);
+ ioc3_rx(dev_id);
if (eisr & EISR_TXEXPLICIT)
- ioc3_tx(dev);
+ ioc3_tx(dev_id);
return IRQ_HANDLED;
}
static inline void ioc3_setup_duplex(struct ioc3_private *ip)
{
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
if (ip->mii.full_duplex) {
- ioc3_w_etcsr(ETCSR_FD);
+ writel(ETCSR_FD, ®s->etcsr);
ip->emcr |= EMCR_DUPLEX;
} else {
- ioc3_w_etcsr(ETCSR_HD);
+ writel(ETCSR_HD, ®s->etcsr);
ip->emcr &= ~EMCR_DUPLEX;
}
- ioc3_w_emcr(ip->emcr);
+ writel(ip->emcr, ®s->emcr);
}
static void ioc3_timer(struct timer_list *t)
@@ -936,7 +880,7 @@ static void ioc3_alloc_rings(struct net_device *dev)
static void ioc3_init_rings(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
unsigned long ring;
ioc3_free_rings(ip);
@@ -947,90 +891,94 @@ static void ioc3_init_rings(struct net_device *dev)
/* Now the rx ring base, consume & produce registers. */
ring = ioc3_map(ip->rxr, 0);
- ioc3_w_erbr_h(ring >> 32);
- ioc3_w_erbr_l(ring & 0xffffffff);
- ioc3_w_ercir(ip->rx_ci << 3);
- ioc3_w_erpir((ip->rx_pi << 3) | ERPIR_ARM);
+ writel(ring >> 32, ®s->erbr_h);
+ writel(ring & 0xffffffff, ®s->erbr_l);
+ writel(ip->rx_ci << 3, ®s->ercir);
+ writel((ip->rx_pi << 3) | ERPIR_ARM, ®s->erpir);
ring = ioc3_map(ip->txr, 0);
ip->txqlen = 0; /* nothing queued */
/* Now the tx ring base, consume & produce registers. */
- ioc3_w_etbr_h(ring >> 32);
- ioc3_w_etbr_l(ring & 0xffffffff);
- ioc3_w_etpir(ip->tx_pi << 7);
- ioc3_w_etcir(ip->tx_ci << 7);
- (void) ioc3_r_etcir(); /* Flush */
+ writel(ring >> 32, ®s->etbr_h);
+ writel(ring & 0xffffffff, ®s->etbr_l);
+ writel(ip->tx_pi << 7, ®s->etpir);
+ writel(ip->tx_ci << 7, ®s->etcir);
+ readl(®s->etcir); /* Flush */
}
static inline void ioc3_ssram_disc(struct ioc3_private *ip)
{
- struct ioc3 *ioc3 = ip->regs;
- volatile u32 *ssram0 = &ioc3->ssram[0x0000];
- volatile u32 *ssram1 = &ioc3->ssram[0x4000];
- unsigned int pattern = 0x5555;
+ struct ioc3_ethregs *regs = ip->regs;
+ u32 *ssram0 = &ip->ssram[0x0000];
+ u32 *ssram1 = &ip->ssram[0x4000];
+ u32 pattern = 0x5555;
/* Assume the larger size SSRAM and enable parity checking */
- ioc3_w_emcr(ioc3_r_emcr() | (EMCR_BUFSIZ | EMCR_RAMPAR));
+ writel(readl(®s->emcr) | (EMCR_BUFSIZ | EMCR_RAMPAR), ®s->emcr);
+ readl(®s->emcr); /* Flush */
- *ssram0 = pattern;
- *ssram1 = ~pattern & IOC3_SSRAM_DM;
+ writel(pattern, ssram0);
+ writel(~pattern & IOC3_SSRAM_DM, ssram1);
- if ((*ssram0 & IOC3_SSRAM_DM) != pattern ||
- (*ssram1 & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) {
+ if ((readl(ssram0) & IOC3_SSRAM_DM) != pattern ||
+ (readl(ssram1) & IOC3_SSRAM_DM) != (~pattern & IOC3_SSRAM_DM)) {
/* set ssram size to 64 KB */
- ip->emcr = EMCR_RAMPAR;
- ioc3_w_emcr(ioc3_r_emcr() & ~EMCR_BUFSIZ);
- } else
- ip->emcr = EMCR_BUFSIZ | EMCR_RAMPAR;
+ ip->emcr |= EMCR_RAMPAR;
+ writel(readl(®s->emcr) & ~EMCR_BUFSIZ, ®s->emcr);
+ } else {
+ ip->emcr |= EMCR_BUFSIZ | EMCR_RAMPAR;
+ }
}
static void ioc3_init(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
del_timer_sync(&ip->ioc3_timer); /* Kill if running */
- ioc3_w_emcr(EMCR_RST); /* Reset */
- (void) ioc3_r_emcr(); /* Flush WB */
+ writel(EMCR_RST, ®s->emcr); /* Reset */
+ readl(®s->emcr); /* Flush WB */
udelay(4); /* Give it time ... */
- ioc3_w_emcr(0);
- (void) ioc3_r_emcr();
+ writel(0, ®s->emcr);
+ readl(®s->emcr);
/* Misc registers */
#ifdef CONFIG_SGI_IP27
- ioc3_w_erbar(PCI64_ATTR_BAR >> 32); /* Barrier on last store */
+ /* Barrier on last store */
+ writel(PCI64_ATTR_BAR >> 32, ®s->erbar);
#else
- ioc3_w_erbar(0); /* Let PCI API get it right */
+ /* Let PCI API get it right */
+ writel(0, ®s->erbar);
#endif
- (void) ioc3_r_etcdc(); /* Clear on read */
- ioc3_w_ercsr(15); /* RX low watermark */
- ioc3_w_ertr(0); /* Interrupt immediately */
+ readl(®s->etcdc); /* Clear on read */
+ writel(15, ®s->ercsr); /* RX low watermark */
+ writel(0, ®s->ertr); /* Interrupt immediately */
__ioc3_set_mac_address(dev);
- ioc3_w_ehar_h(ip->ehar_h);
- ioc3_w_ehar_l(ip->ehar_l);
- ioc3_w_ersr(42); /* XXX should be random */
+ writel(ip->ehar_h, ®s->ehar_h);
+ writel(ip->ehar_l, ®s->ehar_l);
+ writel(42, ®s->ersr); /* XXX should be random */
ioc3_init_rings(dev);
ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
- ioc3_w_emcr(ip->emcr);
- ioc3_w_eier(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
- EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
- EISR_TXEXPLICIT | EISR_TXMEMERR);
- (void) ioc3_r_eier();
+ writel(ip->emcr, ®s->emcr);
+ writel(EISR_RXTIMERINT | EISR_RXOFLO | EISR_RXBUFOFLO |
+ EISR_RXMEMERR | EISR_RXPARERR | EISR_TXBUFUFLO |
+ EISR_TXEXPLICIT | EISR_TXMEMERR, ®s->eier);
+ readl(®s->eier);
}
static inline void ioc3_stop(struct ioc3_private *ip)
{
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
- ioc3_w_emcr(0); /* Shutup */
- ioc3_w_eier(0); /* Disable interrupts */
- (void) ioc3_r_eier(); /* Flush */
+ writel(0, ®s->emcr); /* Shutup */
+ writel(0, ®s->eier); /* Disable interrupts */
+ readl(®s->eier); /* Flush */
}
static int ioc3_open(struct net_device *dev)
@@ -1153,16 +1101,18 @@ static void ioc3_8250_register(struct ioc3_uartregs __iomem *uart)
};
unsigned char lcr;
- lcr = uart->iu_lcr;
- uart->iu_lcr = lcr | UART_LCR_DLAB;
- uart->iu_scr = COSMISC_CONSTANT,
- uart->iu_lcr = lcr;
- uart->iu_lcr;
+ lcr = readb(&uart->iu_lcr);
+ writeb(lcr | UART_LCR_DLAB, &uart->iu_lcr);
+ writeb(COSMISC_CONSTANT, &uart->iu_scr);
+ writeb(lcr, &uart->iu_lcr);
+ readb(&uart->iu_lcr);
serial8250_register_8250_port(&port);
}
static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
{
+ u32 sio_iec;
+
/*
* We need to recognice and treat the fourth MENET serial as it
* does not have an SuperIO chip attached to it, therefore attempting
@@ -1179,29 +1129,31 @@ static void ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3)
* Switch IOC3 to PIO mode. It probably already was but let's be
* paranoid
*/
- ioc3->gpcr_s = GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL;
- ioc3->gpcr_s;
- ioc3->gppr_6 = 0;
- ioc3->gppr_6;
- ioc3->gppr_7 = 0;
- ioc3->gppr_7;
- ioc3->sscr_a = ioc3->sscr_a & ~SSCR_DMA_EN;
- ioc3->sscr_a;
- ioc3->sscr_b = ioc3->sscr_b & ~SSCR_DMA_EN;
- ioc3->sscr_b;
+ writel(GPCR_UARTA_MODESEL | GPCR_UARTB_MODESEL, &ioc3->gpcr_s);
+ readl(&ioc3->gpcr_s);
+ writel(0, &ioc3->gppr[6]);
+ readl(&ioc3->gppr[6]);
+ writel(0, &ioc3->gppr[7]);
+ readl(&ioc3->gppr[7]);
+ writel(readl(&ioc3->port_a.sscr) & ~SSCR_DMA_EN, &ioc3->port_a.sscr);
+ readl(&ioc3->port_a.sscr);
+ writel(readl(&ioc3->port_b.sscr) & ~SSCR_DMA_EN, &ioc3->port_b.sscr);
+ readl(&ioc3->port_b.sscr);
/* Disable all SA/B interrupts except for SA/B_INT in SIO_IEC. */
- ioc3->sio_iec &= ~ (SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
- SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
- SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
- SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
- ioc3->sio_iec |= SIO_IR_SA_INT;
- ioc3->sscr_a = 0;
- ioc3->sio_iec &= ~ (SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
- SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
- SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
- SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
- ioc3->sio_iec |= SIO_IR_SB_INT;
- ioc3->sscr_b = 0;
+ sio_iec = readl(&ioc3->sio_iec);
+ sio_iec &= ~(SIO_IR_SA_TX_MT | SIO_IR_SA_RX_FULL |
+ SIO_IR_SA_RX_HIGH | SIO_IR_SA_RX_TIMER |
+ SIO_IR_SA_DELTA_DCD | SIO_IR_SA_DELTA_CTS |
+ SIO_IR_SA_TX_EXPLICIT | SIO_IR_SA_MEMERR);
+ sio_iec |= SIO_IR_SA_INT;
+ sio_iec &= ~(SIO_IR_SB_TX_MT | SIO_IR_SB_RX_FULL |
+ SIO_IR_SB_RX_HIGH | SIO_IR_SB_RX_TIMER |
+ SIO_IR_SB_DELTA_DCD | SIO_IR_SB_DELTA_CTS |
+ SIO_IR_SB_TX_EXPLICIT | SIO_IR_SB_MEMERR);
+ sio_iec |= SIO_IR_SB_INT;
+ writel(sio_iec, &ioc3->sio_iec);
+ writel(0, &ioc3->port_a.sscr);
+ writel(0, &ioc3->port_b.sscr);
ioc3_8250_register(&ioc3->sregs.uarta);
ioc3_8250_register(&ioc3->sregs.uartb);
@@ -1282,7 +1234,9 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
err = -ENOMEM;
goto out_res;
}
- ip->regs = ioc3;
+ ip->regs = &ioc3->eth;
+ ip->ssram = ioc3->ssram;
+ ip->all_regs = ioc3;
#ifdef CONFIG_SERIAL_8250
ioc3_serial_probe(pdev, ioc3);
@@ -1363,12 +1317,11 @@ static void ioc3_remove_one(struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
unregister_netdev(dev);
del_timer_sync(&ip->ioc3_timer);
- iounmap(ioc3);
+ iounmap(ip->all_regs);
pci_release_regions(pdev);
free_netdev(dev);
/*
@@ -1392,11 +1345,10 @@ static struct pci_driver ioc3_driver = {
static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
- unsigned long data;
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
- unsigned int len;
struct ioc3_etxd *desc;
+ unsigned long data;
+ unsigned int len;
uint32_t w0 = 0;
int produce;
@@ -1489,7 +1441,7 @@ static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev)
ip->tx_skbs[produce] = skb; /* Remember skb */
produce = (produce + 1) & 127;
ip->tx_pi = produce;
- ioc3_w_etpir(produce << 7); /* Fire ... */
+ writel(produce << 7, &ip->regs->etpir); /* Fire ... */
ip->txqlen++;
@@ -1623,21 +1575,21 @@ static int ioc3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
static void ioc3_set_multicast_list(struct net_device *dev)
{
- struct netdev_hw_addr *ha;
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3 *ioc3 = ip->regs;
+ struct ioc3_ethregs *regs = ip->regs;
+ struct netdev_hw_addr *ha;
u64 ehar = 0;
netif_stop_queue(dev); /* Lock out others. */
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
ip->emcr |= EMCR_PROMISC;
- ioc3_w_emcr(ip->emcr);
- (void) ioc3_r_emcr();
+ writel(ip->emcr, ®s->emcr);
+ readl(®s->emcr);
} else {
ip->emcr &= ~EMCR_PROMISC;
- ioc3_w_emcr(ip->emcr); /* Clear promiscuous. */
- (void) ioc3_r_emcr();
+ writel(ip->emcr, ®s->emcr); /* Clear promiscuous. */
+ readl(®s->emcr);
if ((dev->flags & IFF_ALLMULTI) ||
(netdev_mc_count(dev) > 64)) {
@@ -1653,8 +1605,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
ip->ehar_h = ehar >> 32;
ip->ehar_l = ehar & 0xffffffff;
}
- ioc3_w_ehar_h(ip->ehar_h);
- ioc3_w_ehar_l(ip->ehar_l);
+ writel(ip->ehar_h, ®s->ehar_h);
+ writel(ip->ehar_l, ®s->ehar_l);
}
netif_wake_queue(dev); /* Let us get going again. */
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 08/15] net: sgi: ioc3-eth: introduce chip start function
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
ioc3_init did everything from reset to init rings to starting the chip.
This change move out chip start into a new function as preparation
for easier handling of receive buffer allocation failures.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 49 ++++++++++++++++++++++---------------
1 file changed, 29 insertions(+), 20 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index de20f644e07d..05db0d1aeb04 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -105,6 +105,7 @@ static void ioc3_set_multicast_list(struct net_device *dev);
static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void ioc3_timeout(struct net_device *dev);
static inline unsigned int ioc3_hash(const unsigned char *addr);
+static void ioc3_start(struct ioc3_private *ip);
static inline void ioc3_stop(struct ioc3_private *ip);
static void ioc3_init(struct net_device *dev);
@@ -660,6 +661,7 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
ioc3_stop(ip);
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_init(ip);
netif_wake_queue(dev);
@@ -830,31 +832,11 @@ static void ioc3_alloc_rx_bufs(struct net_device *dev)
static void ioc3_init_rings(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3_ethregs *regs = ip->regs;
- unsigned long ring;
ioc3_free_rx_bufs(ip);
ioc3_alloc_rx_bufs(dev);
ioc3_clean_tx_ring(ip);
-
- /* Now the rx ring base, consume & produce registers. */
- ring = ioc3_map(ip->rxr, 0);
- writel(ring >> 32, ®s->erbr_h);
- writel(ring & 0xffffffff, ®s->erbr_l);
- writel(ip->rx_ci << 3, ®s->ercir);
- writel((ip->rx_pi << 3) | ERPIR_ARM, ®s->erpir);
-
- ring = ioc3_map(ip->txr, 0);
-
- ip->txqlen = 0; /* nothing queued */
-
- /* Now the tx ring base, consume & produce registers. */
- writel(ring >> 32, ®s->etbr_h);
- writel(ring & 0xffffffff, ®s->etbr_l);
- writel(ip->tx_pi << 7, ®s->etpir);
- writel(ip->tx_ci << 7, ®s->etcir);
- readl(®s->etcir); /* Flush */
}
static inline void ioc3_ssram_disc(struct ioc3_private *ip)
@@ -911,6 +893,30 @@ static void ioc3_init(struct net_device *dev)
writel(42, ®s->ersr); /* XXX should be random */
ioc3_init_rings(dev);
+}
+
+static void ioc3_start(struct ioc3_private *ip)
+{
+ struct ioc3_ethregs *regs = ip->regs;
+ unsigned long ring;
+
+ /* Now the rx ring base, consume & produce registers. */
+ ring = ioc3_map(ip->rxr, 0);
+ writel(ring >> 32, ®s->erbr_h);
+ writel(ring & 0xffffffff, ®s->erbr_l);
+ writel(ip->rx_ci << 3, ®s->ercir);
+ writel((ip->rx_pi << 3) | ERPIR_ARM, ®s->erpir);
+
+ ring = ioc3_map(ip->txr, 0);
+
+ ip->txqlen = 0; /* nothing queued */
+
+ /* Now the tx ring base, consume & produce registers. */
+ writel(ring >> 32, ®s->etbr_h);
+ writel(ring & 0xffffffff, ®s->etbr_l);
+ writel(ip->tx_pi << 7, ®s->etpir);
+ writel(ip->tx_ci << 7, ®s->etcir);
+ readl(®s->etcir); /* Flush */
ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
@@ -943,6 +949,7 @@ static int ioc3_open(struct net_device *dev)
ip->ehar_h = 0;
ip->ehar_l = 0;
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_start(ip);
netif_start_queue(dev);
@@ -1211,6 +1218,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
ioc3_init(dev);
+ ioc3_start(ip);
ip->pdev = pdev;
@@ -1431,6 +1439,7 @@ static void ioc3_timeout(struct net_device *dev)
ioc3_stop(ip);
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_init(ip);
ioc3_mii_start(ip);
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 14/15] net: sgi: ioc3-eth: protect emcr in all cases
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
emcr in private struct wasn't always protected by spinlock.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 00942b37a1e4..d2b6659adba6 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -729,6 +729,8 @@ static inline void ioc3_setup_duplex(struct ioc3_private *ip)
{
struct ioc3_ethregs *regs = ip->regs;
+ spin_lock_irq(&ip->ioc3_lock);
+
if (ip->mii.full_duplex) {
writel(ETCSR_FD, ®s->etcsr);
ip->emcr |= EMCR_DUPLEX;
@@ -737,6 +739,8 @@ static inline void ioc3_setup_duplex(struct ioc3_private *ip)
ip->emcr &= ~EMCR_DUPLEX;
}
writel(ip->emcr, ®s->emcr);
+
+ spin_unlock_irq(&ip->ioc3_lock);
}
static void ioc3_timer(struct timer_list *t)
@@ -1628,6 +1632,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
netif_stop_queue(dev); /* Lock out others. */
+ spin_lock_irq(&ip->ioc3_lock);
+
if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
ip->emcr |= EMCR_PROMISC;
writel(ip->emcr, ®s->emcr);
@@ -1656,6 +1662,8 @@ static void ioc3_set_multicast_list(struct net_device *dev)
writel(ip->ehar_l, ®s->ehar_l);
}
+ spin_unlock_irq(&ip->ioc3_lock);
+
netif_wake_queue(dev); /* Let us get going again. */
}
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 13/15] net: sgi: ioc3-eth: Fix IPG settings
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
The half/full duplex settings for inter packet gap counters/timer were
reversed.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 0c2713bba741..00942b37a1e4 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -79,8 +79,8 @@
#define RX_OFFSET (sizeof(struct ioc3_erxbuf) + NET_IP_ALIGN)
#define RX_BUF_SIZE (13 * IOC3_DMA_XFER_LEN)
-#define ETCSR_FD ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
-#define ETCSR_HD ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_FD ((21 << ETCSR_IPGR2_SHIFT) | (21 << ETCSR_IPGR1_SHIFT) | 21)
+#define ETCSR_HD ((17 << ETCSR_IPGR2_SHIFT) | (11 << ETCSR_IPGR1_SHIFT) | 21)
/* Private per NIC data of the driver. */
struct ioc3_private {
--
2.13.7
^ permalink raw reply related
* [PATCH v2 net-next 06/15] net: sgi: ioc3-eth: get rid of ioc3_clean_rx_ring()
From: Thomas Bogendoerfer @ 2019-08-29 15:50 UTC (permalink / raw)
To: Ralf Baechle, Paul Burton, James Hogan, David S. Miller,
linux-mips, linux-kernel, netdev
In-Reply-To: <20190829155014.9229-1-tbogendoerfer@suse.de>
Move clearing of the descriptor valid bit into ioc3_alloc_rings. This
makes ioc3_clean_rx_ring obsolete.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/sgi/ioc3-eth.c | 22 +---------------------
1 file changed, 1 insertion(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d9d94a55ac34..e3867ea9abb7 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -761,26 +761,6 @@ static void ioc3_mii_start(struct ioc3_private *ip)
add_timer(&ip->ioc3_timer);
}
-static inline void ioc3_clean_rx_ring(struct ioc3_private *ip)
-{
- struct ioc3_erxbuf *rxb;
- struct sk_buff *skb;
- int i;
-
- for (i = ip->rx_ci; i & 15; i++) {
- ip->rx_skbs[ip->rx_pi] = ip->rx_skbs[ip->rx_ci];
- ip->rxr[ip->rx_pi++] = ip->rxr[ip->rx_ci++];
- }
- ip->rx_pi &= RX_RING_MASK;
- ip->rx_ci &= RX_RING_MASK;
-
- for (i = ip->rx_ci; i != ip->rx_pi; i = (i + 1) & RX_RING_MASK) {
- skb = ip->rx_skbs[i];
- rxb = (struct ioc3_erxbuf *)(skb->data - RX_OFFSET);
- rxb->w0 = 0;
- }
-}
-
static inline void ioc3_clean_tx_ring(struct ioc3_private *ip)
{
struct sk_buff *skb;
@@ -841,6 +821,7 @@ static void ioc3_alloc_rings(struct net_device *dev)
/* Because we reserve afterwards. */
skb_put(skb, (1664 + RX_OFFSET));
rxb = (struct ioc3_erxbuf *)skb->data;
+ rxb->w0 = 0; /* Clear valid flag */
ip->rxr[i] = cpu_to_be64(ioc3_map(rxb, 1));
skb_reserve(skb, RX_OFFSET);
}
@@ -860,7 +841,6 @@ static void ioc3_init_rings(struct net_device *dev)
ioc3_free_rings(ip);
ioc3_alloc_rings(dev);
- ioc3_clean_rx_ring(ip);
ioc3_clean_tx_ring(ip);
/* Now the rx ring base, consume & produce registers. */
--
2.13.7
^ permalink raw reply related
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