- 09 Mar, 2017 40 commits
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Iyappan Subramanian authored
This patch adds functions to configure ethernet hardware. Signed-off-by:
Iyappan Subramanian <isubramanian@apm.com> Signed-off-by:
Keyur Chudgar <kchudgar@apm.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Iyappan Subramanian authored
This patch adds functions to configure and control mac. This patch also adds helper functions to get/set registers. Signed-off-by:
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Iyappan Subramanian authored
This patch adds DMA descriptor setup and interrupt enable/disable functions. Signed-off-by:
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Rick Farrington authored
Add support for XPS. Signed-off-by:
Rick Farrington <ricardo.farrington@cavium.com> Signed-off-by:
Felix Manlunas <felix.manlunas@cavium.com> Signed-off-by:
Derek Chickles <derek.chickles@cavium.com> Signed-off-by:
Satanand Burla <satananda.burla@cavium.com> Signed-off-by:
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Joao Pinto authored
The axi variable was not being freed upon device removal. With devm_kzalloc it ensures that it is properly freed. Signed-off-by:
Joao Pinto <jpinto@synopsys.com> Signed-off-by:
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Tobias Klauser authored
Use eth_hw_addr_random() to set a random dev_addr and update addr_assign_type instead of open-coding it. Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Florian Fainelli authored
Introduce a Kconfig option: CONFIG_TIGON3_HWMON which allows to build in/out support for thermal sensors reported by Tigon3 NICs. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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David S. Miller authored
Thomas Petazzoni says: ==================== net: mvpp2: add initial support for PPv2.2 The goal of this patch series is to add basic support for PPv2.2 in the existing mvpp2 driver. mvpp2 currently supported the PPv2.1 version of the IP, used in the 32 bits Marvell Armada 375 SoC. PPv2.2 is an evolution of this IP block, used in the 64 bits Marvell Armada 7K/8K SoCs. In order to ease the review, the introduction of PPv2.2 support has been made into multiple small commits, with the final commit adding the compatible string that makes the PPv2.2 support actually usable. The series remain fully bisectable. People interested in testing the code will find the full series (plus a few Device Tree patches) at: https://github.com/MISL-EBU-System-SW/mainline-public/tree/4.11/mvpp2.2-support-v3 I'd like to thank Stefan Chulski and Marcin Wojtas, who helped me a lot in the development of this patch series, by reviewing the patches, and giving lots of useful hints to debug the driver on PPv2.2. Thanks as well to Russell King for reviewing previous iterations of this series, and providing suggestions and fixes. Changes between v2 and v3: - Rebased on v4.11-rc1. - Add patch "net: mvpp2: fix DMA address calculation in mvpp2_txq_inc_put()", to properly take into account the "packet offset" field of the TX descriptors. Without this, we were getting DMA_API_DEBUG warnings that we are unmapping DMA mappings with a non-mapped DMA address. - In patch "net: mvpp2: add and use accessors for TX/RX descriptors", add a function named mvpp2_txdesc_offset_get(), which is needed for the DMA address calculation fix. - In patch "net: mvpp2: add and use accessors for TX/RX descriptors", fix the calculation of tx_desc physical address and packet offset in mvpp2_tx_frag_process(). The offset was assigned into the buffer physical address, and the physical address to the packet offset, which meant the fragment process was completely broken. - In patch "net: mvpp2: adjust the allocation/free of BM pools for PPv2.2" fix how MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK is used. This mask is already shifted. So the value should be shifted before being masked and not the opposite. - Add a new patch "net: mvpp2: set dma mask and coherent dma mask on PPv2.2", to set the DMA mask and DMA coherent mask. By setting the DMA mask to 40 bits we avoid using bounce buffers when network packets are above the 4 GB limit. The coherent mask remains set to 32 bits, because the BM pools must all have the same high 32 bits in their addresses. - Use "dma" instead of "phys" where appropriate, as suggested by Russell King. - Use the "cookie" field of the RX descriptor to store the physical address instead of the virtual address, and then use phys_to_virt() to get the virtual address. This allows to work around the limit that the "cookie" field only has 40 bits, which is not sufficient to store a virtual address on 64 bits platforms. This was suggested by Russell King. As part of this change, also got rid of all the compile time conditionals on CONFIG_ARCH_DMA_ADDR_T_64BIT, to get better compile-time coverage. - In patch "net: mvpp2: handle misc PPv2.1/PPv2.2 differences": * Instead of calling mvpp21_port_power_up(port) only on PPv2.1, remove this function, and call its relevant parts directly from ->probe(). Only mvpp2_port_fc_adv_enable() is PPv2.1 specific. Reported by Russell King. * Add a mvpp22_port_mii_set() function that properly initializes SGMII support on PPv2.2. Code provided by Russell King. - In patch "net: mvpp2: handle register mapping and access for PPv2.2": * Adjust the code to match the change of the DT binding in terms of mapping the second register area on PPv2.2. * Rework the register accessors to remove the get_cpu()/put_cpu(), and instead use separate accessors for global registers vs. per-CPU registers. - Add a few new patches removing dead/unused/useless code: net: mvpp2: remove support for buffer header net: mvpp2: remove unused register definition MVPP2_TXQ_THRESH_REG net: mvpp2: remove mvpp2_txq_pend_desc_num_get() function - Fix a number of checkpatch warnings. Changes between v1 and v2: - Made a separate series from the set of patches doing preparation changes/fixes to the mvpp2 driver. - Rebased on top of v4.10-rc1. - Update Kconfig text of the mvpp2 driver to mention the support for Armada 7K and 8K (PPv2.2). ==================== Signed-off-by:
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Thomas Petazzoni authored
Now that the mvpp2 driver has been modified to accommodate the support for PPv2.2, we can finally advertise this support by adding the appropriate compatible string. At the same time, we update the Kconfig description of the MVPP2 driver. Signed-off-by:
Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by:
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Thomas Petazzoni authored
On PPv2.2, the streaming mappings can be anywhere in the first 40 bits of the physical address space. However, for the coherent mappings, we still need them to be in the first 32 bits of the address space, because all BM pools share a single register to store the high 32 bits of the BM pool address, which means all BM pools must be allocated in the same 4GB memory area. Signed-off-by:
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Thomas Petazzoni authored
The PPv2.2 variant of the network controller needs an additional clock, the "MG clock" in order for the IP block to operate properly. This commit adds support for this additional clock to the driver, reworking as needed the error handling path. Signed-off-by:
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Thomas Petazzoni authored
In PPv2.1, we have a maximum of 8 RXQs per port, with a default of 4 RXQs per port, and we were assigning RXQs 0->3 to the first port, 4->7 to the second port, 8->11 to the third port, etc. In PPv2.2, we have a maximum of 32 RXQs per port, and we must allocate RXQs from the range of 32 RXQs available for each port. So port 0 must use RXQs in the range 0->31, port 1 in the range 32->63, etc. This commit adapts the mvpp2 to this difference between PPv2.1 and PPv2.2: - The constant definition MVPP2_MAX_RXQ is replaced by a new field 'max_port_rxqs' in 'struct mvpp2', which stores the maximum number of RXQs per port. This field is initialized during ->probe() depending on the IP version. - MVPP2_RXQ_TOTAL_NUM is removed, and instead we calculate the total number of RXQs by multiplying the number of ports by the maximum of RXQs per port. This was anyway used in only one place. - In mvpp2_port_probe(), the calculation of port->first_rxq is adjusted to cope with the different allocation strategy between PPv2.1 and PPv2.2. Due to this change, the 'next_first_rxq' argument of this function is no longer needed and is removed. Signed-off-by:
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Thomas Petazzoni authored
This commit adjusts how the MVPP2_ISR_RXQ_GROUP_REG register is configured, since it changed between PPv2.1 and PPv2.2. Signed-off-by:
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Thomas Petazzoni authored
The PPv2.2 unit is connected to an AXI bus on Armada 7K/8K, so this commit adds the necessary initialization of the AXI bridge. Signed-off-by:
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Thomas Petazzoni authored
This commit handles a few miscellaneous differences between PPv2.1 and PPv2.2 in different areas, where code done for PPv2.1 doesn't apply for PPv2.2 or needs to be adjusted (getting the MAC address, disabling PHY polling, etc.). Thanks to Russell King for providing the initial implementation of mvpp22_port_mii_set(). Signed-off-by:
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Thomas Petazzoni authored
This commit adjusts the mvpp2 driver register mapping and access logic to support PPv2.2, to handle a number of differences. Due to how the registers are laid out in memory, the Device Tree binding for the "reg" property is different: - On PPv2.1, we had a first area for the packet processor registers (common to all ports), and then one area per port. - On PPv2.2, we have a first area for the packet processor registers (common to all ports), and a second area for numerous other registers, including a large number of per-port registers In addition, on PPv2.2, the area for the common registers is split into so-called "address spaces" of 64 KB each. They allow to access per-CPU registers, where each CPU has its own copy of some registers. A few other registers, which have a single copy, also need to be accessed from those per-CPU windows if they are related to a per-CPU register. For example: - Writing to MVPP2_TXQ_NUM_REG selects a TX queue. This register is a per-CPU register, it must be accessed from the current CPU register window. - Then a write to MVPP2_TXQ_PENDING_REG, MVPP2_TXQ_DESC_ADDR_REG (and a few others) will affect the TX queue that was selected by the write to MVPP2_TXQ_NUM_REG. It must be accessed from the same CPU window as the write to the TXQ_NUM_REG. Therefore, the ->base member of 'struct mvpp2' is replaced with a ->cpu_base[] array, each entry pointing to a mapping of the per-CPU area. Since PPv2.1 doesn't have this concept of per-CPU windows, all entries in ->cpu_base[] point to the same io-remapped area. The existing mvpp2_read() and mvpp2_write() accessors use cpu_base[0], they are used for registers for which the CPU window doesn't matter. mvpp2_percpu_read() and mvpp2_percpu_write() are new accessors added to access the registers for which the CPU window does matter, which is why they take a "cpu" as argument. The driver is then changed to use mvpp2_percpu_read() and mvpp2_percpu_write() where it matters. Signed-off-by: -
Thomas Petazzoni authored
In PPv2.2, the MVPP2_RXQ_DESC_ADDR_REG and MVPP2_TXQ_DESC_ADDR_REG registers have a slightly different layout, because they need to contain a 64-bit address for the RX and TX descriptor arrays. This commit adjusts those functions accordingly. Signed-off-by:
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Thomas Petazzoni authored
This commit modifies the mvpp2_defaults_set() function to not do the loopback and FIFO threshold initialization, which are not needed for PPv2.2. Signed-off-by:
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Thomas Petazzoni authored
The MVPP2_RXQ_CONFIG_REG register has a slightly different layout between PPv2.1 and PPv2.2, so this commit adapts the functions modifying this register to accommodate for both the PPv2.1 and PPv2.2 cases. Signed-off-by:
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Thomas Petazzoni authored
This commit adjusts the allocation and freeing of BM pools to support PPv2.2. This involves: - Checking that the number of buffer pointers is a multiple of 16, as required by the hardware. - Adjusting the size of the DMA coherent area allocated for buffer pointers. Indeed, PPv2.2 needs space for 2 pointers of 64-bits per buffer, as opposed to 2 pointers of 32-bits per buffer in PPv2.1. The size in bytes is now stored in a new field of the mvpp2_bm_pool structure. - On PPv2.2, getting the DMA address and cookie (used for the physical address) of each buffer requires reading the MVPP22_BM_ADDR_HIGH_ALLOC to get the high order bits of those addresses. A new utility function mvpp2_bm_bufs_get_addrs() is introduced to handle this. - On PPv2.2, releasing a buffer requires writing the high order 32 bits of the DMA address and cookie to MVPP22_BM_PHY_VIRT_HIGH_RLS_REG. Signed-off-by:
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Thomas Petazzoni authored
This commit adds the definition of the PPv2.2 HW descriptors, adjusts the mvpp2_tx_desc and mvpp2_rx_desc structures accordingly, and adapts the accessors to work on both PPv2.1 and PPv2.2. Signed-off-by:
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Thomas Petazzoni authored
Since the format of the HW descriptors is different between PPv2.1 and PPv2.2, this commit introduces an intermediate union, with for now only the PPv2.1 descriptors. The bulk of the driver code only manipulates opaque mvpp2_tx_desc and mvpp2_rx_desc pointers, and the descriptors can only be accessed and modified through the accessor functions. A follow-up commit will add the descriptor definitions for PPv2.2. Signed-off-by:
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Thomas Petazzoni authored
In preparation to the introduction for the support of PPv2.2 in the mvpp2 driver, this commit adds a hw_version field to the struct mvpp2, and uses the .data field of the DT match table to fill it in. Having the MVPP21 and MVPP22 definitions available will allow to start adding the necessary conditional code to support PPv2.2. Signed-off-by:
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Thomas Petazzoni authored
The PPv2.2 IP has a different TX and RX descriptor layout compared to PPv2.1. In order to prepare for the introduction of PPv2.2 support in mvpp2, this commit adds accessors for the different fields of the TX and RX descriptors, and changes the code to use them. For now, the mvpp2_port argument passed to the accessors is not used, but it will be used in follow-up to update the descriptor according to the version of the IP being used. Apart from the mechanical changes to use the newly introduced accessors, a few other changes, needed to use the accessors, are made: - The mvpp2_txq_inc_put() function now takes a mvpp2_port as first argument, as it is needed to use the accessors. - Similarly, the mvpp2_bm_cookie_build() gains a mvpp2_port first argument, for the same reason. - In mvpp2_rx_error(), instead of accessing the RX descriptor in each case of the switch, we introduce a local variable to store the packet size. - In mvpp2_tx_frag_process() and mvpp2_tx() instead of accessing the packet size from the TX descriptor, we use the actual value available in the function, which is used to set the TX descriptor packet size a few lines before. Signed-off-by:
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Thomas Petazzoni authored
The RX descriptors of the PPv2 hardware allow to store several information, amongst which: - the DMA address of the buffer in which the data has been received - a "cookie" field, left to the use of the driver, and not used by the hardware In the current implementation, the "cookie" field is used to store the virtual address of the buffer, so that in the receive completion path, we can easily get the virtual address of the buffer that corresponds to a completed RX descriptors. On PPv2.1, used on 32-bit platforms, those two fields are 32-bit wide, which is enough to store a DMA address in the first field, and a virtual address in the second field. On PPv2.2, used on 64-bit platforms, these two fields have been extended to 40 bits. While 40 bits is enough to store a DMA address (as long as the DMA mask is 40 bits or lower), it is not enough to store a virtual address. Therefore, the "cookie" field can no longer be used to store the virtual address of the buffer. However, as Russell King pointed out, the RX buffers are always allocated in the kernel linear mapping, and therefore using phys_to_virt() on the physical address of the RX buffer is possible and correct. Therefore, this commit changes the driver to use the "cookie" field to store the physical address instead of the virtual address. phys_to_virt() is used in the receive completion path to retrieve the virtual address from the physical address. It is obviously important to realize that the DMA address and physical address are two different things, which is why we store both in the RX descriptors. While those addresses may be identical in some situations, it remains two distinct concepts, and both addresses should be handled separately. Signed-off-by:
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Thomas Petazzoni authored
The mvpp2_txq_pend_desc_num_get() function only selects a TX queue, and reads the number of pending descriptors. It is used in only one place, in mvpp2_txq_clean(), where the TX queue has already been selected by a write to MVPP2_TXQ_NUM_REG. Therefore, this function is useless, and the caller can simply read the value of the MVPP2_TXQ_PENDING_REG register instead. Signed-off-by:
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Thomas Petazzoni authored
This register is no longer used since commit edc660fa ("net: mvpp2: replace TX coalescing interrupts with hrtimer"). Signed-off-by:
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Thomas Petazzoni authored
The "buffer header" functionality is a functionality used by the hardware to split an incoming packets over multiple BM buffers if they are not large enough. However, the mvpp2 driver guarantees that a pool of BM buffers has buffers with a size large enough to store MTU-sized packets. Therefore, this functionality is completely unused, and the code can be removed, and we should never get a descriptor with bit MVPP2_RXD_BUF_HDR set. Signed-off-by:
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Thomas Petazzoni authored
As indicated by Russell King, the mvpp2 driver currently uses a lot "phys" or "phys_addr" to store what really is a DMA address. This commit clarifies this by using "dma" or "dma_addr" where appropriate. This is especially important as we are going to introduce more changes where the distinction between physical address and DMA address will be key. Signed-off-by:
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Thomas Petazzoni authored
The Marvell PPv2 Device Tree binding was so far only used to describe the PPv2.1 network controller, used in the Marvell Armada 375. A new version of this IP block, PPv2.2 is used in the Marvell Armada 7K/8K processor. This commit extends the existing binding so that it can also be used to describe PPv2.2 hardware. Signed-off-by:
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David S. Miller authored
Eric Dumazet says: ==================== mlx4: order-0 allocations and page recycling As mentioned half a year ago, we better switch mlx4 driver to order-0 allocations and page recycling. This reduces vulnerability surface thanks to better skb->truesize tracking and provides better performance in most cases. (33 Gbit for one TCP flow on my lab hosts) I will provide for linux-4.13 a patch on top of this series, trying to improve data locality as described in https://www.spinics.net/lists/netdev/msg422258.html v2 provides an ethtool -S new counter (rx_alloc_pages) and code factorization, plus Tariq fix. v3 includes various fixes based on Tariq tests and feedback from Saeed and Tariq. v4 rebased on net-next for inclusion in linux-4.12, as requested by Tariq. Worth noting this patch series deletes ~250 lines of code ;) ==================== Signed-off-by:
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Eric Dumazet authored
We should keep one way to build skbs, regardless of GRO being on or off. Note that I made sure to defer as much as possible the point we need to pull data from the frame, so that future prefetch() we might add are more effective. These skb attributes derive from the CQE or ring : ip_summed, csum hash vlan offload hwtstamps queue_mapping As a bonus, this patch removes mlx4 dependency on eth_get_headlen() which is very often broken enough to give us headaches. Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Eric Dumazet authored
Testing a boolean in fast path is not worth duplicating the code allocating packets, when GRO is on or off. If this proves to be a problem, we might later use a jump label. Next patch will remove this duplicated code and ease code review. Signed-off-by:
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Eric Dumazet authored
We need to compute the frame virtual address at different points. Do it once. Following patch will use the new va address for validate_loopback() Signed-off-by:
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Eric Dumazet authored
Instead of fetching dma address from rx_desc->data[0].addr, prefer using frags[0].dma + frags[0].page_offset to avoid a potential cache line miss. Signed-off-by:
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Eric Dumazet authored
This new counter tracks number of pages that we allocated for one port. lpaa24:~# ethtool -S eth0 | egrep 'rx_alloc_pages|rx_packets' rx_packets: 306755183 rx_alloc_pages: 932897 Signed-off-by: -
Eric Dumazet authored
Same technique than some Intel drivers, for arches where PAGE_SIZE = 4096 In most cases, pages are reused because they were consumed before we could loop around the RX ring. This brings back performance, and is even better, a single TCP flow reaches 30Gbit on my hosts. v2: added full memset() in mlx4_en_free_frag(), as Tariq found it was needed if we switch to large MTU, as priv->log_rx_info can dynamically be changed. Signed-off-by:
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Eric Dumazet authored
Use of order-3 pages is problematic in some cases. This patch might add three kinds of regression : 1) a CPU performance regression, but we will add later page recycling and performance should be back. 2) TCP receiver could grow its receive window slightly slower, because skb->len/skb->truesize ratio will decrease. This is mostly ok, we prefer being conservative to not risk OOM, and eventually tune TCP better in the future. This is consistent with other drivers using 2048 per ethernet frame. 3) Because we allocate one page per RX slot, we consume more memory for the ring buffers. XDP already had this constraint anyway. Signed-off-by:
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Eric Dumazet authored
We will soon use order-0 pages, and frag truesize will more precisely match real sizes. In the new model, we prefer to use <= 2048 bytes fragments, so that we can use page-recycle technique on PAGE_SIZE=4096 arches. We will still pack as much frames as possible on arches with big pages, like PowerPC. Signed-off-by:
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Eric Dumazet authored
We only need to store the page and dma address. Signed-off-by:
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