- 09 10月, 2008 1 次提交
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由 Lennert Buytenhek 提交于
In preparation of giving mii_bus objects a device tree presence of their own, rename struct mii_bus's ->dev argument to ->parent, since having a 'struct device *dev' that points to our parent device conflicts with introducing a 'struct device dev' representing our own device. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NAndy Fleming <afleming@freescale.com>
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- 01 10月, 2008 1 次提交
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由 Lennert Buytenhek 提交于
This gives a nice increase in the maximum loss-free packet forwarding rate in routing workloads. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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- 20 9月, 2008 2 次提交
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由 Lennert Buytenhek 提交于
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Switch mv643xx_eth from using drivers/net/mii.c to using phylib. Since the mv643xx_eth hardware does all the link state handling and PHY polling, the driver will use phylib in the "Doing it all yourself" mode described in the phylib documentation. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com> Acked-by: NAndy Fleming <afleming@freescale.com>
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- 19 9月, 2008 3 次提交
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由 Lennert Buytenhek 提交于
If we don't poll the hardware statistics counters at least once every ~34 seconds, overflow might occur without us noticing. So, set up a timer to poll the statistics counters at least once every 30 seconds. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
When the IP header doesn't start 14, 18, 22 or 26 bytes into the packet (which are the only four cases that the hardware can deal with if asked to do IP checksumming on transmit), invoke the software checksum helper instead of letting the packet go out with a corrupt checksum inserted into the packet in the wrong place. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
We have to explicitly tell the hardware to include the pseudo-header when doing receive checksumming, otherwise hardware checksumming will fail for every received packet and we'll end up setting CHECKSUM_NONE on every received packet. While we're at it, when skb->ip_summed is set to CHECKSUM_UNNECESSARY on received packets, skb->csum is supposed to be undefined, and thus there is no need to set it. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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- 14 9月, 2008 7 次提交
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由 Lennert Buytenhek 提交于
Add support for mv643xx_eth versions that have no transmit bandwidth control registers at all, such as the ethernet block found in the Marvell 88F6183 ARM SoC. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Currently, the receive processing reads ->byte_cnt twice (once to update interface statistics and once to properly size the data area of the received skb), but since receive descriptors live in uncached memory, caching this value in a local variable saves one uncached access, and increases routing performance a tiny little bit more. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Since the size of the receive queue is directly related to the data cache footprint of the driver (between refilling a receive ring entry with a fresh skb and receiving a packet in that entry, queue_size - 1 other skbs will have been touched), shrink the default receive queue size to a saner number of entries, as 400 is definite overkill for almost all workloads. While we are at it, trim the default transmit queue size a bit as well. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Get rid of the skb pointer array that we currently use for transmit reclaim, and replace it with an skb queue, to which skbuffs are appended when they are passed to the xmit function, and removed from the front and freed when we do transmit queue reclaim and hit a descriptor with the 'owned by device' bit clear and 'last descriptor' bit set. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
By moving DMA unmapping during transmit reclaim back under the netif tx lock, we avoid the situation where we read the DMA address and buffer length from the descriptor under the lock and then not do anything with that data after dropping the lock on platforms where the DMA unmapping routines are all NOPs (which is the case on all ARM platforms that mv643xx_eth is used on at least). This saves two uncached reads, which makes a small but measurable performance difference in routing benchmarks. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Since our ->hard_start_xmit() method is already called under spinlock protection (the netif tx queue lock), we can simply make that lock cover the private transmit state (descriptor ring indexes et al.) as well, which avoids having to use a private lock to protect that state. Since this was the last user of the driver-private spinlock, it can be killed off. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Move link status handling, transmit reclaim and TX_END handling from the interrupt handler to the napi poll handler. This allows switching ->lock over to a non-IRQ-safe lock and removes all explicit interrupt disabling from the driver. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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- 05 9月, 2008 15 次提交
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由 Lennert Buytenhek 提交于
As all the infrastructure for multiple transmit queues already exists in the driver, this patch is entirely trivial. The individual transmit queues are still serialised by the driver's per-port private spinlock, but that will disappear (i.e. be replaced by the per-subqueue ->_xmit_lock) in a subsequent patch. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Delete a couple of unused and uninteresting interrupt source mask bits: - The receive resource underrun interrupt sources are uninteresting because if we are in out-of-memory mode, we are already dealing with the issue, and we don't need the hardware to remind us again that we are out of memory. - The LINK and PHY interrupt sources can be coalesced into one define, since we always use them together. - The transmit resource underrun interrupt source can be disabled since we never activate the head descriptor of a paged skb until the fragments are all activated, so transmit underrun during a packet should never happen. - The INT_EXT_TX_0 define is never used. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
There is no need to call netif_{stop,wake}_queue() when the link goes down/up, as the networking already takes care of this internally. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Currently, there are two different fields in the mv643xx_eth_platform_data struct that together describe the PHY address -- one field (phy_addr) has the address of the PHY, but if that address is zero, a second field (force_phy_addr) needs to be set to distinguish the actual address zero from a zero due to not having filled in the PHY address explicitly (which should mean 'use the default PHY address'). If we are a bit smarter about the encoding of the phy_addr field, we can avoid the need for a second field -- this patch does that. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Which top-level unit's SMI interface to use should be a property of the top-level unit, not of the individual ports. This patch moves the ->shared_smi pointer from the per-port platform data to the global platform data. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Simplify receive and transmit queue handling by requiring the set of queue numbers to be contiguous starting from zero. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Get rid of the mv643xx_eth-internal MV643XX_ETH_CHECKSUM_OFFLOAD_TX compile-time option. Using transmit checksumming is the sane default, and anyone wanting to disable it should use ethtool(8) instead of recompiling their kernels. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
By having the receive out-of-memory handling timer schedule the napi poll handler and then doing oom processing from the napi poll handler, all code that touches receive state moves to napi context, letting us get rid of all explicit locking in the receive paths since the only mutual exclusion we need anymore at that point is protection against reentering ourselves, which is provided by napi synchronisation. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Make napi unconditional on the receive side, so that we can get rid of all the locking and local interrupt disabling in the receive path. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
If the platform code has passed us the IRQ number of the mv643xx_eth top-level error interrupt, use the error interrupt to wait for SMI access completion instead of polling the SMI busy bit, since SMI bus accesses can take up to tens of milliseconds. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Since commit 81600eea ("mv643xx_eth: use auto phy polling for configuring (R)(G)MII interface"), mv643xx_eth no longer does SMI accesses from interrupt context. The only other callers that do SMI accesses all do them from process context, which means we can switch the PHY lock from a spinlock to a mutex, and get rid of the extra locking in some ethtool methods. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Get rid of the modulo operations that are currently used for computing successive TX/RX descriptor ring indexes. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Using IRQF_SAMPLE_RANDOM for the mv643xx_eth interrupt handler significantly increases interrupt processing overhead, so get rid of it. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
When tearing down a DMA mapping for a receive buffer, we should pass dma_unmap_single() the exact same address that dma_map_single() gave us when we originally set up the mapping. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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- 24 8月, 2008 6 次提交
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由 Lennert Buytenhek 提交于
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
The mv643xx_eth hardware ignores the lower three bits of the buffer size field in receive descriptors, causing the reception of full-sized packets to fail at some MTUs. Fix this by rounding the size of allocated receive buffers up to a multiple of eight bytes. While we are at it, add a bit of extra space to each receive buffer so that we can handle multiple vlan tags on ingress. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
When we are low on memory, the assumption that every descriptor in the receive ring will have an skbuff associated with it does not hold. rxq_process() was assuming that if the receive descriptor it is working on is not owned by the hardware, it can safely be processed and handed to the networking stack. But a descriptor in the receive ring not being owned by the hardware can also happen when we are low on memory and did not manage to refill the receive ring fully. This patch changes rxq_process()'s bailout condition from "the first receive descriptor to be processed is owned by the hardware" to "the first receive descriptor to be processed is owned by the hardware OR the number of valid receive descriptors in the ring is zero". Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Nicolas Pitre noted that mv643xx_eth_poll was incorrectly using non-IRQ-safe locks while checking whether to wake up the netdevice's transmit queue. Convert the locking to *_irq() variants, since we are running from softirq context where interrupts are enabled. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Commit 12e4ab79 ("mv643xx_eth: be more agressive about RX refill") changed the condition for the receive out-of-memory timer to be scheduled from "the receive ring is empty" to "the receive ring is not full". This can lead to a situation where the receive out-of-memory timer is pending because a previous rxq_refill() didn't manage to refill the receive ring entirely as a result of being out of memory, and rxq_refill() is then called again as a side effect of a packet receive interrupt, and that rxq_refill() call then again does not succeed to refill the entire receive ring with fresh empty skbuffs because we are still out of memory, and then tries to call add_timer() on the already scheduled out-of-memory timer. This patch fixes this issue by changing the add_timer() call in rxq_refill() to a mod_timer() call. If the OOM timer was not already scheduled, this will behave as before, whereas if it was already scheduled, this patch will push back its firing time a bit, which is safe because we've (unsuccessfully) attempted to refill the receive ring just before we do this. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
When a receive interrupt occurs, mv643xx_eth would first process the receive descriptors and then ACK the receive interrupt, instead of the other way round. This would leave a small race window between processing the last receive descriptor and clearing the receive interrupt status in which a new packet could come in, which would then 'rot' in the receive ring until the next receive interrupt would come in. Fix this by ACKing (clearing) the receive interrupt condition before processing the receive descriptors. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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- 24 7月, 2008 5 次提交
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由 Lennert Buytenhek 提交于
Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Although mv643xx_eth has no hardware support for inserting a vlan tag by twiddling some bits in the TX descriptor, it does support hardware TX checksumming on packets where the IP header starts {a limited set of values other than 14} bytes into the packet. This patch sets mv643xx_eth's ->vlan_features to NETIF_F_SG | NETIF_F_IP_CSUM, which prevents the stack from checksumming vlan'ed packets in software, and if vlan tags are present on a transmitted packet, notifies the hardware of this fact by toggling the right bits in the TX descriptor. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
When there is a link status change (link or phy status interrupt), print a message notifying the user of the new link status. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
The mv643xx_eth hardware has a provision for polling the PHY's MII management registers to obtain the (R)(G)MII interface speed (10/100/1000) and duplex (half/full) and pause (off/symmetric) settings to use to talk to the PHY. The driver currently does not make use of this feature. Instead, whenever there is a link status change event, it reads the current link parameters from the PHY, and programs those parameters into the mv643xx_eth MAC by hand. This patch switches the mv643xx_eth driver to letting the MAC auto-determine the (R)(G)MII link parameters by PHY polling, if there is a PHY present. For PHYless ports (when e.g. the (R)(G)MII interface is connected to a hardware switch), we keep hardcoding the MII interface parameters. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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由 Lennert Buytenhek 提交于
Print the mv643xx_eth driver version on init to help debugging. Signed-off-by: NLennert Buytenhek <buytenh@marvell.com>
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