diff options
Diffstat (limited to 'drivers/staging/et131x/et1310_rx.c')
| -rw-r--r-- | drivers/staging/et131x/et1310_rx.c | 1152 |
1 files changed, 0 insertions, 1152 deletions
diff --git a/drivers/staging/et131x/et1310_rx.c b/drivers/staging/et131x/et1310_rx.c deleted file mode 100644 index 7e386e07ff97..000000000000 --- a/drivers/staging/et131x/et1310_rx.c +++ /dev/null @@ -1,1152 +0,0 @@ -/* - * Agere Systems Inc. - * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs - * - * Copyright © 2005 Agere Systems Inc. - * All rights reserved. - * http://www.agere.com - * - *------------------------------------------------------------------------------ - * - * et1310_rx.c - Routines used to perform data reception - * - *------------------------------------------------------------------------------ - * - * SOFTWARE LICENSE - * - * This software is provided subject to the following terms and conditions, - * which you should read carefully before using the software. Using this - * software indicates your acceptance of these terms and conditions. If you do - * not agree with these terms and conditions, do not use the software. - * - * Copyright © 2005 Agere Systems Inc. - * All rights reserved. - * - * Redistribution and use in source or binary forms, with or without - * modifications, are permitted provided that the following conditions are met: - * - * . Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following Disclaimer as comments in the code as - * well as in the documentation and/or other materials provided with the - * distribution. - * - * . Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following Disclaimer in the documentation - * and/or other materials provided with the distribution. - * - * . Neither the name of Agere Systems Inc. nor the names of the contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * Disclaimer - * - * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, - * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY - * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN - * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND - * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT - * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - * - */ - -#include "et131x_version.h" -#include "et131x_defs.h" - -#include <linux/pci.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> - -#include <linux/sched.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/ctype.h> -#include <linux/string.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/in.h> -#include <linux/delay.h> -#include <linux/io.h> -#include <linux/bitops.h> -#include <asm/system.h> - -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/if_arp.h> -#include <linux/ioport.h> - -#include "et1310_phy.h" -#include "et131x_adapter.h" -#include "et1310_rx.h" -#include "et131x.h" - -static inline u32 bump_fbr(u32 *fbr, u32 limit) -{ - u32 v = *fbr; - v++; - /* This works for all cases where limit < 1024. The 1023 case - works because 1023++ is 1024 which means the if condition is not - taken but the carry of the bit into the wrap bit toggles the wrap - value correctly */ - if ((v & ET_DMA10_MASK) > limit) { - v &= ~ET_DMA10_MASK; - v ^= ET_DMA10_WRAP; - } - /* For the 1023 case */ - v &= (ET_DMA10_MASK|ET_DMA10_WRAP); - *fbr = v; - return v; -} - -/** - * et131x_rx_dma_memory_alloc - * @adapter: pointer to our private adapter structure - * - * Returns 0 on success and errno on failure (as defined in errno.h) - * - * Allocates Free buffer ring 1 for sure, free buffer ring 0 if required, - * and the Packet Status Ring. - */ -int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter) -{ - u32 i, j; - u32 bufsize; - u32 pktStatRingSize, FBRChunkSize; - struct rx_ring *rx_ring; - - /* Setup some convenience pointers */ - rx_ring = &adapter->rx_ring; - - /* Alloc memory for the lookup table */ -#ifdef USE_FBR0 - rx_ring->fbr[0] = kmalloc(sizeof(struct fbr_lookup), GFP_KERNEL); -#endif - rx_ring->fbr[1] = kmalloc(sizeof(struct fbr_lookup), GFP_KERNEL); - - /* The first thing we will do is configure the sizes of the buffer - * rings. These will change based on jumbo packet support. Larger - * jumbo packets increases the size of each entry in FBR0, and the - * number of entries in FBR0, while at the same time decreasing the - * number of entries in FBR1. - * - * FBR1 holds "large" frames, FBR0 holds "small" frames. If FBR1 - * entries are huge in order to accommodate a "jumbo" frame, then it - * will have less entries. Conversely, FBR1 will now be relied upon - * to carry more "normal" frames, thus it's entry size also increases - * and the number of entries goes up too (since it now carries - * "small" + "regular" packets. - * - * In this scheme, we try to maintain 512 entries between the two - * rings. Also, FBR1 remains a constant size - when it's size doubles - * the number of entries halves. FBR0 increases in size, however. - */ - - if (adapter->RegistryJumboPacket < 2048) { -#ifdef USE_FBR0 - rx_ring->Fbr0BufferSize = 256; - rx_ring->Fbr0NumEntries = 512; -#endif - rx_ring->Fbr1BufferSize = 2048; - rx_ring->Fbr1NumEntries = 512; - } else if (adapter->RegistryJumboPacket < 4096) { -#ifdef USE_FBR0 - rx_ring->Fbr0BufferSize = 512; - rx_ring->Fbr0NumEntries = 1024; -#endif - rx_ring->Fbr1BufferSize = 4096; - rx_ring->Fbr1NumEntries = 512; - } else { -#ifdef USE_FBR0 - rx_ring->Fbr0BufferSize = 1024; - rx_ring->Fbr0NumEntries = 768; -#endif - rx_ring->Fbr1BufferSize = 16384; - rx_ring->Fbr1NumEntries = 128; - } - -#ifdef USE_FBR0 - adapter->rx_ring.PsrNumEntries = adapter->rx_ring.Fbr0NumEntries + - adapter->rx_ring.Fbr1NumEntries; -#else - adapter->rx_ring.PsrNumEntries = adapter->rx_ring.Fbr1NumEntries; -#endif - - /* Allocate an area of memory for Free Buffer Ring 1 */ - bufsize = (sizeof(struct fbr_desc) * rx_ring->Fbr1NumEntries) + 0xfff; - rx_ring->pFbr1RingVa = pci_alloc_consistent(adapter->pdev, - bufsize, - &rx_ring->pFbr1RingPa); - if (!rx_ring->pFbr1RingVa) { - dev_err(&adapter->pdev->dev, - "Cannot alloc memory for Free Buffer Ring 1\n"); - return -ENOMEM; - } - - /* Save physical address - * - * NOTE: pci_alloc_consistent(), used above to alloc DMA regions, - * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses - * are ever returned, make sure the high part is retrieved here - * before storing the adjusted address. - */ - rx_ring->Fbr1Realpa = rx_ring->pFbr1RingPa; - - /* Align Free Buffer Ring 1 on a 4K boundary */ - et131x_align_allocated_memory(adapter, - &rx_ring->Fbr1Realpa, - &rx_ring->Fbr1offset, 0x0FFF); - - rx_ring->pFbr1RingVa = (void *)((u8 *) rx_ring->pFbr1RingVa + - rx_ring->Fbr1offset); - -#ifdef USE_FBR0 - /* Allocate an area of memory for Free Buffer Ring 0 */ - bufsize = (sizeof(struct fbr_desc) * rx_ring->Fbr0NumEntries) + 0xfff; - rx_ring->pFbr0RingVa = pci_alloc_consistent(adapter->pdev, - bufsize, - &rx_ring->pFbr0RingPa); - if (!rx_ring->pFbr0RingVa) { - dev_err(&adapter->pdev->dev, - "Cannot alloc memory for Free Buffer Ring 0\n"); - return -ENOMEM; - } - - /* Save physical address - * - * NOTE: pci_alloc_consistent(), used above to alloc DMA regions, - * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses - * are ever returned, make sure the high part is retrieved here before - * storing the adjusted address. - */ - rx_ring->Fbr0Realpa = rx_ring->pFbr0RingPa; - - /* Align Free Buffer Ring 0 on a 4K boundary */ - et131x_align_allocated_memory(adapter, - &rx_ring->Fbr0Realpa, - &rx_ring->Fbr0offset, 0x0FFF); - - rx_ring->pFbr0RingVa = (void *)((u8 *) rx_ring->pFbr0RingVa + - rx_ring->Fbr0offset); -#endif - - for (i = 0; i < (rx_ring->Fbr1NumEntries / FBR_CHUNKS); - i++) { - u64 Fbr1Offset; - u64 Fbr1TempPa; - u32 Fbr1Align; - - /* This code allocates an area of memory big enough for N - * free buffers + (buffer_size - 1) so that the buffers can - * be aligned on 4k boundaries. If each buffer were aligned - * to a buffer_size boundary, the effect would be to double - * the size of FBR0. By allocating N buffers at once, we - * reduce this overhead. - */ - if (rx_ring->Fbr1BufferSize > 4096) - Fbr1Align = 4096; - else - Fbr1Align = rx_ring->Fbr1BufferSize; - - FBRChunkSize = - (FBR_CHUNKS * rx_ring->Fbr1BufferSize) + Fbr1Align - 1; - rx_ring->Fbr1MemVa[i] = - pci_alloc_consistent(adapter->pdev, FBRChunkSize, - &rx_ring->Fbr1MemPa[i]); - - if (!rx_ring->Fbr1MemVa[i]) { - dev_err(&adapter->pdev->dev, - "Could not alloc memory\n"); - return -ENOMEM; - } - - /* See NOTE in "Save Physical Address" comment above */ - Fbr1TempPa = rx_ring->Fbr1MemPa[i]; - - et131x_align_allocated_memory(adapter, - &Fbr1TempPa, - &Fbr1Offset, (Fbr1Align - 1)); - - for (j = 0; j < FBR_CHUNKS; j++) { - u32 index = (i * FBR_CHUNKS) + j; - - /* Save the Virtual address of this index for quick - * access later - */ - rx_ring->fbr[1]->virt[index] = - (u8 *) rx_ring->Fbr1MemVa[i] + - (j * rx_ring->Fbr1BufferSize) + Fbr1Offset; - - /* now store the physical address in the descriptor - * so the device can access it - */ - rx_ring->fbr[1]->bus_high[index] = - (u32) (Fbr1TempPa >> 32); - rx_ring->fbr[1]->bus_low[index] = (u32) Fbr1TempPa; - - Fbr1TempPa += rx_ring->Fbr1BufferSize; - - rx_ring->fbr[1]->buffer1[index] = - rx_ring->fbr[1]->virt[index]; - rx_ring->fbr[1]->buffer2[index] = - rx_ring->fbr[1]->virt[index] - 4; - } - } - -#ifdef USE_FBR0 - /* Same for FBR0 (if in use) */ - for (i = 0; i < (rx_ring->Fbr0NumEntries / FBR_CHUNKS); - i++) { - u64 Fbr0Offset; - u64 Fbr0TempPa; - - FBRChunkSize = ((FBR_CHUNKS + 1) * rx_ring->Fbr0BufferSize) - 1; - rx_ring->Fbr0MemVa[i] = - pci_alloc_consistent(adapter->pdev, FBRChunkSize, - &rx_ring->Fbr0MemPa[i]); - - if (!rx_ring->Fbr0MemVa[i]) { - dev_err(&adapter->pdev->dev, - "Could not alloc memory\n"); - return -ENOMEM; - } - - /* See NOTE in "Save Physical Address" comment above */ - Fbr0TempPa = rx_ring->Fbr0MemPa[i]; - - et131x_align_allocated_memory(adapter, - &Fbr0TempPa, - &Fbr0Offset, - rx_ring->Fbr0BufferSize - 1); - - for (j = 0; j < FBR_CHUNKS; j++) { - u32 index = (i * FBR_CHUNKS) + j; - - rx_ring->fbr[0]->virt[index] = - (u8 *) rx_ring->Fbr0MemVa[i] + - (j * rx_ring->Fbr0BufferSize) + Fbr0Offset; - - rx_ring->fbr[0]->bus_high[index] = - (u32) (Fbr0TempPa >> 32); - rx_ring->fbr[0]->bus_low[index] = (u32) Fbr0TempPa; - - Fbr0TempPa += rx_ring->Fbr0BufferSize; - - rx_ring->fbr[0]->buffer1[index] = - rx_ring->fbr[0]->virt[index]; - rx_ring->fbr[0]->buffer2[index] = - rx_ring->fbr[0]->virt[index] - 4; - } - } -#endif - - /* Allocate an area of memory for FIFO of Packet Status ring entries */ - pktStatRingSize = - sizeof(struct pkt_stat_desc) * adapter->rx_ring.PsrNumEntries; - - rx_ring->pPSRingVa = pci_alloc_consistent(adapter->pdev, - pktStatRingSize, - &rx_ring->pPSRingPa); - - if (!rx_ring->pPSRingVa) { - dev_err(&adapter->pdev->dev, - "Cannot alloc memory for Packet Status Ring\n"); - return -ENOMEM; - } - printk(KERN_INFO "PSR %lx\n", (unsigned long) rx_ring->pPSRingPa); - - /* - * NOTE : pci_alloc_consistent(), used above to alloc DMA regions, - * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses - * are ever returned, make sure the high part is retrieved here before - * storing the adjusted address. - */ - - /* Allocate an area of memory for writeback of status information */ - rx_ring->rx_status_block = pci_alloc_consistent(adapter->pdev, - sizeof(struct rx_status_block), - &rx_ring->rx_status_bus); - if (!rx_ring->rx_status_block) { - dev_err(&adapter->pdev->dev, - "Cannot alloc memory for Status Block\n"); - return -ENOMEM; - } - rx_ring->NumRfd = NIC_DEFAULT_NUM_RFD; - printk(KERN_INFO "PRS %lx\n", (unsigned long)rx_ring->rx_status_bus); - - /* Recv - * pci_pool_create initializes a lookaside list. After successful - * creation, nonpaged fixed-size blocks can be allocated from and - * freed to the lookaside list. - * RFDs will be allocated from this pool. - */ - rx_ring->RecvLookaside = kmem_cache_create(adapter->netdev->name, - sizeof(struct rfd), - 0, - SLAB_CACHE_DMA | - SLAB_HWCACHE_ALIGN, - NULL); - - adapter->flags |= fMP_ADAPTER_RECV_LOOKASIDE; - - /* The RFDs are going to be put on lists later on, so initialize the - * lists now. - */ - INIT_LIST_HEAD(&rx_ring->RecvList); - return 0; -} - -/** - * et131x_rx_dma_memory_free - Free all memory allocated within this module. - * @adapter: pointer to our private adapter structure - */ -void et131x_rx_dma_memory_free(struct et131x_adapter *adapter) -{ - u32 index; - u32 bufsize; - u32 pktStatRingSize; - struct rfd *rfd; - struct rx_ring *rx_ring; - - /* Setup some convenience pointers */ - rx_ring = &adapter->rx_ring; - - /* Free RFDs and associated packet descriptors */ - WARN_ON(rx_ring->nReadyRecv != rx_ring->NumRfd); - - while (!list_empty(&rx_ring->RecvList)) { - rfd = (struct rfd *) list_entry(rx_ring->RecvList.next, - struct rfd, list_node); - - list_del(&rfd->list_node); - rfd->skb = NULL; - kmem_cache_free(adapter->rx_ring.RecvLookaside, rfd); - } - - /* Free Free Buffer Ring 1 */ - if (rx_ring->pFbr1RingVa) { - /* First the packet memory */ - for (index = 0; index < - (rx_ring->Fbr1NumEntries / FBR_CHUNKS); index++) { - if (rx_ring->Fbr1MemVa[index]) { - u32 Fbr1Align; - - if (rx_ring->Fbr1BufferSize > 4096) - Fbr1Align = 4096; - else - Fbr1Align = rx_ring->Fbr1BufferSize; - - bufsize = - (rx_ring->Fbr1BufferSize * FBR_CHUNKS) + - Fbr1Align - 1; - - pci_free_consistent(adapter->pdev, - bufsize, - rx_ring->Fbr1MemVa[index], - rx_ring->Fbr1MemPa[index]); - - rx_ring->Fbr1MemVa[index] = NULL; - } - } - - /* Now the FIFO itself */ - rx_ring->pFbr1RingVa = (void *)((u8 *) - rx_ring->pFbr1RingVa - rx_ring->Fbr1offset); - - bufsize = (sizeof(struct fbr_desc) * rx_ring->Fbr1NumEntries) - + 0xfff; - - pci_free_consistent(adapter->pdev, bufsize, - rx_ring->pFbr1RingVa, rx_ring->pFbr1RingPa); - - rx_ring->pFbr1RingVa = NULL; - } - -#ifdef USE_FBR0 - /* Now the same for Free Buffer Ring 0 */ - if (rx_ring->pFbr0RingVa) { - /* First the packet memory */ - for (index = 0; index < - (rx_ring->Fbr0NumEntries / FBR_CHUNKS); index++) { - if (rx_ring->Fbr0MemVa[index]) { - bufsize = - (rx_ring->Fbr0BufferSize * - (FBR_CHUNKS + 1)) - 1; - - pci_free_consistent(adapter->pdev, - bufsize, - rx_ring->Fbr0MemVa[index], - rx_ring->Fbr0MemPa[index]); - - rx_ring->Fbr0MemVa[index] = NULL; - } - } - - /* Now the FIFO itself */ - rx_ring->pFbr0RingVa = (void *)((u8 *) - rx_ring->pFbr0RingVa - rx_ring->Fbr0offset); - - bufsize = (sizeof(struct fbr_desc) * rx_ring->Fbr0NumEntries) - + 0xfff; - - pci_free_consistent(adapter->pdev, - bufsize, - rx_ring->pFbr0RingVa, rx_ring->pFbr0RingPa); - - rx_ring->pFbr0RingVa = NULL; - } -#endif - - /* Free Packet Status Ring */ - if (rx_ring->pPSRingVa) { - pktStatRingSize = - sizeof(struct pkt_stat_desc) * adapter->rx_ring.PsrNumEntries; - - pci_free_consistent(adapter->pdev, pktStatRingSize, - rx_ring->pPSRingVa, rx_ring->pPSRingPa); - - rx_ring->pPSRingVa = NULL; - } - - /* Free area of memory for the writeback of status information */ - if (rx_ring->rx_status_block) { - pci_free_consistent(adapter->pdev, - sizeof(struct rx_status_block), - rx_ring->rx_status_block, rx_ring->rx_status_bus); - rx_ring->rx_status_block = NULL; - } - - /* Free receive buffer pool */ - - /* Free receive packet pool */ - - /* Destroy the lookaside (RFD) pool */ - if (adapter->flags & fMP_ADAPTER_RECV_LOOKASIDE) { - kmem_cache_destroy(rx_ring->RecvLookaside); - adapter->flags &= ~fMP_ADAPTER_RECV_LOOKASIDE; - } - - /* Free the FBR Lookup Table */ -#ifdef USE_FBR0 - kfree(rx_ring->fbr[0]); -#endif - - kfree(rx_ring->fbr[1]); - - /* Reset Counters */ - rx_ring->nReadyRecv = 0; -} - -/** - * et131x_init_recv - Initialize receive data structures. - * @adapter: pointer to our private adapter structure - * - * Returns 0 on success and errno on failure (as defined in errno.h) - */ -int et131x_init_recv(struct et131x_adapter *adapter) -{ - int status = -ENOMEM; - struct rfd *rfd = NULL; - u32 rfdct; - u32 numrfd = 0; - struct rx_ring *rx_ring; - - /* Setup some convenience pointers */ - rx_ring = &adapter->rx_ring; - - /* Setup each RFD */ - for (rfdct = 0; rfdct < rx_ring->NumRfd; rfdct++) { - rfd = kmem_cache_alloc(rx_ring->RecvLookaside, - GFP_ATOMIC | GFP_DMA); - - if (!rfd) { - dev_err(&adapter->pdev->dev, - "Couldn't alloc RFD out of kmem_cache\n"); - status = -ENOMEM; - continue; - } - - rfd->skb = NULL; - - /* Add this RFD to the RecvList */ - list_add_tail(&rfd->list_node, &rx_ring->RecvList); - - /* Increment both the available RFD's, and the total RFD's. */ - rx_ring->nReadyRecv++; - numrfd++; - } - - if (numrfd > NIC_MIN_NUM_RFD) - status = 0; - - rx_ring->NumRfd = numrfd; - - if (status != 0) { - kmem_cache_free(rx_ring->RecvLookaside, rfd); - dev_err(&adapter->pdev->dev, - "Allocation problems in et131x_init_recv\n"); - } - return status; -} - -/** - * ConfigRxDmaRegs - Start of Rx_DMA init sequence - * @etdev: pointer to our adapter structure - */ -void ConfigRxDmaRegs(struct et131x_adapter *etdev) -{ - struct rxdma_regs __iomem *rx_dma = &etdev->regs->rxdma; - struct rx_ring *rx_local = &etdev->rx_ring; - struct fbr_desc *fbr_entry; - u32 entry; - u32 psr_num_des; - unsigned long flags; - - /* Halt RXDMA to perform the reconfigure. */ - et131x_rx_dma_disable(etdev); - - /* Load the completion writeback physical address - * - * NOTE : pci_alloc_consistent(), used above to alloc DMA regions, - * ALWAYS returns SAC (32-bit) addresses. If DAC (64-bit) addresses - * are ever returned, make sure the high part is retrieved here - * before storing the adjusted address. - */ - writel((u32) ((u64)rx_local->rx_status_bus >> 32), - &rx_dma->dma_wb_base_hi); - writel((u32) rx_local->rx_status_bus, &rx_dma->dma_wb_base_lo); - - memset(rx_local->rx_status_block, 0, sizeof(struct rx_status_block)); - - /* Set the address and parameters of the packet status ring into the - * 1310's registers - */ - writel((u32) ((u64)rx_local->pPSRingPa >> 32), - &rx_dma->psr_base_hi); - writel((u32) rx_local->pPSRingPa, &rx_dma->psr_base_lo); - writel(rx_local->PsrNumEntries - 1, &rx_dma->psr_num_des); - writel(0, &rx_dma->psr_full_offset); - - psr_num_des = readl(&rx_dma->psr_num_des) & 0xFFF; - writel((psr_num_des * LO_MARK_PERCENT_FOR_PSR) / 100, - &rx_dma->psr_min_des); - - spin_lock_irqsave(&etdev->rcv_lock, flags); - - /* These local variables track the PSR in the adapter structure */ - rx_local->local_psr_full = 0; - - /* Now's the best time to initialize FBR1 contents */ - fbr_entry = (struct fbr_desc *) rx_local->pFbr1RingVa; - for (entry = 0; entry < rx_local->Fbr1NumEntries; entry++) { - fbr_entry->addr_hi = rx_local->fbr[1]->bus_high[entry]; - fbr_entry->addr_lo = rx_local->fbr[1]->bus_low[entry]; - fbr_entry->word2 = entry; - fbr_entry++; - } - - /* Set the address and parameters of Free buffer ring 1 (and 0 if - * required) into the 1310's registers - */ - writel((u32) (rx_local->Fbr1Realpa >> 32), &rx_dma->fbr1_base_hi); - writel((u32) rx_local->Fbr1Realpa, &rx_dma->fbr1_base_lo); - writel(rx_local->Fbr1NumEntries - 1, &rx_dma->fbr1_num_des); - writel(ET_DMA10_WRAP, &rx_dma->fbr1_full_offset); - - /* This variable tracks the free buffer ring 1 full position, so it - * has to match the above. - */ - rx_local->local_Fbr1_full = ET_DMA10_WRAP; - writel(((rx_local->Fbr1NumEntries * LO_MARK_PERCENT_FOR_RX) / 100) - 1, - &rx_dma->fbr1_min_des); - -#ifdef USE_FBR0 - /* Now's the best time to initialize FBR0 contents */ - fbr_entry = (struct fbr_desc *) rx_local->pFbr0RingVa; - for (entry = 0; entry < rx_local->Fbr0NumEntries; entry++) { - fbr_entry->addr_hi = rx_local->fbr[0]->bus_high[entry]; - fbr_entry->addr_lo = rx_local->fbr[0]->bus_low[entry]; - fbr_entry->word2 = entry; - fbr_entry++; - } - - writel((u32) (rx_local->Fbr0Realpa >> 32), &rx_dma->fbr0_base_hi); - writel((u32) rx_local->Fbr0Realpa, &rx_dma->fbr0_base_lo); - writel(rx_local->Fbr0NumEntries - 1, &rx_dma->fbr0_num_des); - writel(ET_DMA10_WRAP, &rx_dma->fbr0_full_offset); - - /* This variable tracks the free buffer ring 0 full position, so it - * has to match the above. - */ - rx_local->local_Fbr0_full = ET_DMA10_WRAP; - writel(((rx_local->Fbr0NumEntries * LO_MARK_PERCENT_FOR_RX) / 100) - 1, - &rx_dma->fbr0_min_des); -#endif - - /* Program the number of packets we will receive before generating an - * interrupt. - * For version B silicon, this value gets updated once autoneg is - *complete. - */ - writel(PARM_RX_NUM_BUFS_DEF, &rx_dma->num_pkt_done); - - /* The "time_done" is not working correctly to coalesce interrupts - * after a given time period, but rather is giving us an interrupt - * regardless of whether we have received packets. - * This value gets updated once autoneg is complete. - */ - writel(PARM_RX_TIME_INT_DEF, &rx_dma->max_pkt_time); - - spin_unlock_irqrestore(&etdev->rcv_lock, flags); -} - -/** - * SetRxDmaTimer - Set the heartbeat timer according to line rate. - * @etdev: pointer to our adapter structure - */ -void SetRxDmaTimer(struct et131x_adapter *etdev) -{ - /* For version B silicon, we do not use the RxDMA timer for 10 and 100 - * Mbits/s line rates. We do not enable and RxDMA interrupt coalescing. - */ - if ((etdev->linkspeed == TRUEPHY_SPEED_100MBPS) || - (etdev->linkspeed == TRUEPHY_SPEED_10MBPS)) { - writel(0, &etdev->regs->rxdma.max_pkt_time); - writel(1, &etdev->regs->rxdma.num_pkt_done); - } -} - -/** - * NICReturnRFD - Recycle a RFD and put it back onto the receive list - * @etdev: pointer to our adapter - * @rfd: pointer to the RFD - */ -void nic_return_rfd(struct et131x_adapter *etdev, struct rfd *rfd) -{ - struct rx_ring *rx_local = &etdev->rx_ring; - struct rxdma_regs __iomem *rx_dma = &etdev->regs->rxdma; - u16 bi = rfd->bufferindex; - u8 ri = rfd->ringindex; - unsigned long flags; - - /* We don't use any of the OOB data besides status. Otherwise, we - * need to clean up OOB data - */ - if ( -#ifdef USE_FBR0 - (ri == 0 && bi < rx_local->Fbr0NumEntries) || -#endif - (ri == 1 && bi < rx_local->Fbr1NumEntries)) { - spin_lock_irqsave(&etdev->FbrLock, flags); - - if (ri == 1) { - struct fbr_desc *next = - (struct fbr_desc *) (rx_local->pFbr1RingVa) + - INDEX10(rx_local->local_Fbr1_full); - - /* Handle the Free Buffer Ring advancement here. Write - * the PA / Buffer Index for the returned buffer into - * the oldest (next to be freed)FBR entry - */ - next->addr_hi = rx_local->fbr[1]->bus_high[bi]; - next->addr_lo = rx_local->fbr[1]->bus_low[bi]; - next->word2 = bi; - - writel(bump_fbr(&rx_local->local_Fbr1_full, - rx_local->Fbr1NumEntries - 1), - &rx_dma->fbr1_full_offset); - } -#ifdef USE_FBR0 - else { - struct fbr_desc *next = (struct fbr_desc *) - rx_local->pFbr0RingVa + - INDEX10(rx_local->local_Fbr0_full); - - /* Handle the Free Buffer Ring advancement here. Write - * the PA / Buffer Index for the returned buffer into - * the oldest (next to be freed) FBR entry - */ - next->addr_hi = rx_local->fbr[0]->bus_high[bi]; - next->addr_lo = rx_local->fbr[0]->bus_low[bi]; - next->word2 = bi; - - writel(bump_fbr(&rx_local->local_Fbr0_full, - rx_local->Fbr0NumEntries - 1), - &rx_dma->fbr0_full_offset); - } -#endif - spin_unlock_irqrestore(&etdev->FbrLock, flags); - } else { - dev_err(&etdev->pdev->dev, - "NICReturnRFD illegal Buffer Index returned\n"); - } - - /* The processing on this RFD is done, so put it back on the tail of - * our list - */ - spin_lock_irqsave(&etdev->rcv_lock, flags); - list_add_tail(&rfd->list_node, &rx_local->RecvList); - rx_local->nReadyRecv++; - spin_unlock_irqrestore(&etdev->rcv_lock, flags); - - WARN_ON(rx_local->nReadyRecv > rx_local->NumRfd); -} - -/** - * et131x_rx_dma_disable - Stop of Rx_DMA on the ET1310 - * @etdev: pointer to our adapter structure - */ -void et131x_rx_dma_disable(struct et131x_adapter *etdev) -{ - u32 csr; - /* Setup the receive dma configuration register */ - writel(0x00002001, &etdev->regs->rxdma.csr); - csr = readl(&etdev->regs->rxdma.csr); - if ((csr & 0x00020000) == 0) { /* Check halt status (bit 17) */ - udelay(5); - csr = readl(&etdev->regs->rxdma.csr); - if ((csr & 0x00020000) == 0) - dev_err(&etdev->pdev->dev, - "RX Dma failed to enter halt state. CSR 0x%08x\n", - csr); - } -} - -/** - * et131x_rx_dma_enable - re-start of Rx_DMA on the ET1310. - * @etdev: pointer to our adapter structure - */ -void et131x_rx_dma_enable(struct et131x_adapter *etdev) -{ - /* Setup the receive dma configuration register for normal operation */ - u32 csr = 0x2000; /* FBR1 enable */ - - if (etdev->rx_ring.Fbr1BufferSize == 4096) - csr |= 0x0800; - else if (etdev->rx_ring.Fbr1BufferSize == 8192) - csr |= 0x1000; - else if (etdev->rx_ring.Fbr1BufferSize == 16384) - csr |= 0x1800; -#ifdef USE_FBR0 - csr |= 0x0400; /* FBR0 enable */ - if (etdev->rx_ring.Fbr0BufferSize == 256) - csr |= 0x0100; - else if (etdev->rx_ring.Fbr0BufferSize == 512) - csr |= 0x0200; - else if (etdev->rx_ring.Fbr0BufferSize == 1024) - csr |= 0x0300; -#endif - writel(csr, &etdev->regs->rxdma.csr); - - csr = readl(&etdev->regs->rxdma.csr); - if ((csr & 0x00020000) != 0) { - udelay(5); - csr = readl(&etdev->regs->rxdma.csr); - if ((csr & 0x00020000) != 0) { - dev_err(&etdev->pdev->dev, - "RX Dma failed to exit halt state. CSR 0x%08x\n", - csr); - } - } -} - -/** - * nic_rx_pkts - Checks the hardware for available packets - * @etdev: pointer to our adapter - * - * Returns rfd, a pointer to our MPRFD. - * - * Checks the hardware for available packets, using completion ring - * If packets are available, it gets an RFD from the RecvList, attaches - * the packet to it, puts the RFD in the RecvPendList, and also returns - * the pointer to the RFD. - */ -struct rfd *nic_rx_pkts(struct et131x_adapter *etdev) -{ - struct rx_ring *rx_local = &etdev->rx_ring; - struct rx_status_block *status; - struct pkt_stat_desc *psr; - struct rfd *rfd; - u32 i; - u8 *buf; - unsigned long flags; - struct list_head *element; - u8 rindex; - u16 bindex; - u32 len; - u32 word0; - u32 word1; - - /* RX Status block is written by the DMA engine prior to every - * interrupt. It contains the next to be used entry in the Packet - * Status Ring, and also the two Free Buffer rings. - */ - status = rx_local->rx_status_block; - word1 = status->Word1 >> 16; /* Get the useful bits */ - - /* Check the PSR and wrap bits do not match */ - if ((word1 & 0x1FFF) == (rx_local->local_psr_full & 0x1FFF)) - /* Looks like this ring is not updated yet */ - return NULL; - - /* The packet status ring indicates that data is available. */ - psr = (struct pkt_stat_desc *) (rx_local->pPSRingVa) + - (rx_local->local_psr_full & 0xFFF); - - /* Grab any information that is required once the PSR is - * advanced, since we can no longer rely on the memory being - * accurate - */ - len = psr->word1 & 0xFFFF; - rindex = (psr->word1 >> 26) & 0x03; - bindex = (psr->word1 >> 16) & 0x3FF; - word0 = psr->word0; - - /* Indicate that we have used this PSR entry. */ - /* FIXME wrap 12 */ - add_12bit(&rx_local->local_psr_full, 1); - if ((rx_local->local_psr_full & 0xFFF) > rx_local->PsrNumEntries - 1) { - /* Clear psr full and toggle the wrap bit */ - rx_local->local_psr_full &= ~0xFFF; - rx_local->local_psr_full ^= 0x1000; - } - - writel(rx_local->local_psr_full, - &etdev->regs->rxdma.psr_full_offset); - -#ifndef USE_FBR0 - if (rindex != 1) - return NULL; -#endif - -#ifdef USE_FBR0 - if (rindex > 1 || - (rindex == 0 && - bindex > rx_local->Fbr0NumEntries - 1) || - (rindex == 1 && - bindex > rx_local->Fbr1NumEntries - 1)) -#else - if (rindex != 1 || bindex > rx_local->Fbr1NumEntries - 1) -#endif - { - /* Illegal buffer or ring index cannot be used by S/W*/ - dev_err(&etdev->pdev->dev, - "NICRxPkts PSR Entry %d indicates " - "length of %d and/or bad bi(%d)\n", - rx_local->local_psr_full & 0xFFF, - len, bindex); - return NULL; - } - - /* Get and fill the RFD. */ - spin_lock_irqsave(&etdev->rcv_lock, flags); - - rfd = NULL; - element = rx_local->RecvList.next; - rfd = (struct rfd *) list_entry(element, struct rfd, list_node); - - if (rfd == NULL) { - spin_unlock_irqrestore(&etdev->rcv_lock, flags); - return NULL; - } - - list_del(&rfd->list_node); - rx_local->nReadyRecv--; - - spin_unlock_irqrestore(&etdev->rcv_lock, flags); - - rfd->bufferindex = bindex; - rfd->ringindex = rindex; - - /* In V1 silicon, there is a bug which screws up filtering of - * runt packets. Therefore runt packet filtering is disabled - * in the MAC and the packets are dropped here. They are - * also counted here. - */ - if (len < (NIC_MIN_PACKET_SIZE + 4)) { - etdev->stats.other_errors++; - len = 0; - } - - if (len) { - if (etdev->ReplicaPhyLoopbk == 1) { - buf = rx_local->fbr[rindex]->virt[bindex]; - - if (memcmp(&buf[6], etdev->addr, ETH_ALEN) == 0) { - if (memcmp(&buf[42], "Replica packet", - ETH_HLEN)) { - etdev->ReplicaPhyLoopbkPF = 1; - } - } - } - - /* Determine if this is a multicast packet coming in */ - if ((word0 & ALCATEL_MULTICAST_PKT) && - !(word0 & ALCATEL_BROADCAST_PKT)) { - /* Promiscuous mode and Multicast mode are - * not mutually exclusive as was first - * thought. I guess Promiscuous is just - * considered a super-set of the other - * filters. Generally filter is 0x2b when in - * promiscuous mode. - */ - if ((etdev->PacketFilter & ET131X_PACKET_TYPE_MULTICAST) - && !(etdev->PacketFilter & ET131X_PACKET_TYPE_PROMISCUOUS) - && !(etdev->PacketFilter & ET131X_PACKET_TYPE_ALL_MULTICAST)) { - buf = rx_local->fbr[rindex]-> - virt[bindex]; - - /* Loop through our list to see if the - * destination address of this packet - * matches one in our list. - */ - for (i = 0; - i < etdev->MCAddressCount; - i++) { - if (buf[0] == - etdev->MCList[i][0] - && buf[1] == - etdev->MCList[i][1] - && buf[2] == - etdev->MCList[i][2] - && buf[3] == - etdev->MCList[i][3] - && buf[4] == - etdev->MCList[i][4] - && buf[5] == - etdev->MCList[i][5]) { - break; - } - } - - /* If our index is equal to the number - * of Multicast address we have, then - * this means we did not find this - * packet's matching address in our - * list. Set the len to zero, - * so we free our RFD when we return - * from this function. - */ - if (i == etdev->MCAddressCount) - len = 0; - } - - if (len > 0) - etdev->stats.multircv++; - } else if (word0 & ALCATEL_BROADCAST_PKT) - etdev->stats.brdcstrcv++; - else - /* Not sure what this counter measures in - * promiscuous mode. Perhaps we should check - * the MAC address to see if it is directed - * to us in promiscuous mode. - */ - etdev->stats.unircv++; - } - - if (len > 0) { - struct sk_buff *skb = NULL; - - /*rfd->len = len - 4; */ - rfd->len = len; - - skb = dev_alloc_skb(rfd->len + 2); - if (!skb) { - dev_err(&etdev->pdev->dev, - "Couldn't alloc an SKB for Rx\n"); - return NULL; - } - - etdev->net_stats.rx_bytes += rfd->len; - - memcpy(skb_put(skb, rfd->len), - rx_local->fbr[rindex]->virt[bindex], - rfd->len); - - skb->dev = etdev->netdev; - skb->protocol = eth_type_trans(skb, etdev->netdev); - skb->ip_summed = CHECKSUM_NONE; - - netif_rx(skb); - } else { - rfd->len = 0; - } - - nic_return_rfd(etdev, rfd); - return rfd; -} - -/** - * et131x_reset_recv - Reset the receive list - * @etdev: pointer to our adapter - * - * Assumption, Rcv spinlock has been acquired. - */ -void et131x_reset_recv(struct et131x_adapter *etdev) -{ - WARN_ON(list_empty(&etdev->rx_ring.RecvList)); - -} - -/** - * et131x_handle_recv_interrupt - Interrupt handler for receive processing - * @etdev: pointer to our adapter - * - * Assumption, Rcv spinlock has been acquired. - */ -void et131x_handle_recv_interrupt(struct et131x_adapter *etdev) -{ - struct rfd *rfd = NULL; - u32 count = 0; - bool done = true; - - /* Process up to available RFD's */ - while (count < NUM_PACKETS_HANDLED) { - if (list_empty(&etdev->rx_ring.RecvList)) { - WARN_ON(etdev->rx_ring.nReadyRecv != 0); - done = false; - break; - } - - rfd = nic_rx_pkts(etdev); - - if (rfd == NULL) - break; - - /* Do not receive any packets until a filter has been set. - * Do not receive any packets until we have link. - * If length is zero, return the RFD in order to advance the - * Free buffer ring. - */ - if (!etdev->PacketFilter || - !netif_carrier_ok(etdev->netdev) || - rfd->len == 0) - continue; - - /* Increment the number of packets we received */ - etdev->net_stats.rx_packets++; - - /* Set the status on the packet, either resources or success */ - if (etdev->rx_ring.nReadyRecv < RFD_LOW_WATER_MARK) { - dev_warn(&etdev->pdev->dev, - "RFD's are running out\n"); - } - count++; - } - - if (count == NUM_PACKETS_HANDLED || !done) { - etdev->rx_ring.UnfinishedReceives = true; - writel(PARM_TX_TIME_INT_DEF * NANO_IN_A_MICRO, - &etdev->regs->global.watchdog_timer); - } else - /* Watchdog timer will disable itself if appropriate. */ - etdev->rx_ring.UnfinishedReceives = false; -} - |