From 7c66b14b6bfd4bf1b803be5ba3cc2e2e31d784de Mon Sep 17 00:00:00 2001 From: Mithlesh Thukral Date: Fri, 6 Feb 2009 19:30:40 +0530 Subject: [PATCH] Staging: sxg: Add Jumbo frames support to Sahara SXG Driver This patch adds Jumbo frame support to Sahara's SXG Driver. Signed-off-by: LinSysSoft Sahara Team Signed-off-by: Mithlesh Thukral Signed-off-by: Greg Kroah-Hartman --- drivers/staging/sxg/sxg.c | 175 +++++++++++++++++++++++++++++++++-- drivers/staging/sxg/sxg.h | 7 +- drivers/staging/sxg/sxghif.h | 12 ++- drivers/staging/sxg/sxghw.h | 4 +- 4 files changed, 185 insertions(+), 13 deletions(-) diff --git a/drivers/staging/sxg/sxg.c b/drivers/staging/sxg/sxg.c index 990ad561736f..951904320d9e 100644 --- a/drivers/staging/sxg/sxg.c +++ b/drivers/staging/sxg/sxg.c @@ -146,6 +146,7 @@ static int sxg_initialize_adapter(struct adapter_t *adapter); static void sxg_stock_rcv_buffers(struct adapter_t *adapter); static void sxg_complete_descriptor_blocks(struct adapter_t *adapter, unsigned char Index); +int sxg_change_mtu (struct net_device *netdev, int new_mtu); static int sxg_initialize_link(struct adapter_t *adapter); static int sxg_phy_init(struct adapter_t *adapter); static void sxg_link_event(struct adapter_t *adapter); @@ -942,6 +943,7 @@ static int sxg_entry_probe(struct pci_dev *pcidev, netdev->stop = sxg_entry_halt; netdev->hard_start_xmit = sxg_send_packets; netdev->do_ioctl = sxg_ioctl; + netdev->change_mtu = sxg_change_mtu; #if XXXTODO netdev->set_mac_address = sxg_mac_set_address; #endif @@ -1327,6 +1329,7 @@ static u32 sxg_process_event_queue(struct adapter_t *adapter, u32 RssId, struct sxg_rcv_data_buffer_hdr *RcvDataBufferHdr; #endif u32 ReturnStatus = 0; + int sxg_rcv_data_buffers = SXG_RCV_DATA_BUFFERS; ASSERT((adapter->State == SXG_STATE_RUNNING) || (adapter->State == SXG_STATE_PAUSING) || @@ -1410,7 +1413,10 @@ static u32 sxg_process_event_queue(struct adapter_t *adapter, u32 RssId, * sxg_complete_descriptor_blocks failed to allocate * receive buffers. */ - if (adapter->RcvBuffersOnCard < SXG_RCV_DATA_BUFFERS) { + if (adapter->JumboEnabled) + sxg_rcv_data_buffers = SXG_JUMBO_RCV_DATA_BUFFERS; + + if (adapter->RcvBuffersOnCard < sxg_rcv_data_buffers) { sxg_stock_rcv_buffers(adapter); } /* @@ -1967,6 +1973,57 @@ static int sxg_entry_open(struct net_device *dev) struct adapter_t *adapter = (struct adapter_t *) netdev_priv(dev); int status; static int turn; + int sxg_initial_rcv_data_buffers = SXG_INITIAL_RCV_DATA_BUFFERS; + int i; + + if (adapter->JumboEnabled == TRUE) { + sxg_initial_rcv_data_buffers = + SXG_INITIAL_JUMBO_RCV_DATA_BUFFERS; + SXG_INITIALIZE_RING(adapter->RcvRingZeroInfo, + SXG_JUMBO_RCV_RING_SIZE); + } + + /* + * Allocate receive data buffers. We allocate a block of buffers and + * a corresponding descriptor block at once. See sxghw.h:SXG_RCV_BLOCK + */ + + for (i = 0; i < sxg_initial_rcv_data_buffers; + i += SXG_RCV_DESCRIPTORS_PER_BLOCK) + { + status = sxg_allocate_buffer_memory(adapter, + SXG_RCV_BLOCK_SIZE(SXG_RCV_DATA_HDR_SIZE), + SXG_BUFFER_TYPE_RCV); + if (status != STATUS_SUCCESS) + return status; + } + /* + * NBL resource allocation can fail in the 'AllocateComplete' routine, + * which doesn't return status. Make sure we got the number of buffers + * we requested + */ + + if (adapter->FreeRcvBufferCount < sxg_initial_rcv_data_buffers) { + SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "XAResF6", + adapter, adapter->FreeRcvBufferCount, SXG_MAX_ENTRIES, + 0); + return (STATUS_RESOURCES); + } + /* + * The microcode expects it to be downloaded on every open. + */ + DBG_ERROR("sxg: %s ENTER sxg_download_microcode\n", __FUNCTION__); + if (sxg_download_microcode(adapter, SXG_UCODE_SAHARA)) { + DBG_ERROR("sxg: %s ENTER sxg_adapter_set_hwaddr\n", + __FUNCTION__); + sxg_read_config(adapter); + } else { + adapter->state = ADAPT_FAIL; + adapter->linkstate = LINK_DOWN; + DBG_ERROR("sxg_download_microcode FAILED status[%x]\n", + status); + } + msleep(5); if (turn) { sxg_second_open(adapter->netdev); @@ -2089,11 +2146,19 @@ static void __devexit sxg_entry_remove(struct pci_dev *pcidev) static int sxg_entry_halt(struct net_device *dev) { struct adapter_t *adapter = (struct adapter_t *) netdev_priv(dev); + struct sxg_hw_regs *HwRegs = adapter->HwRegs; + int i; + u32 RssIds, IsrCount; + unsigned long flags; + + RssIds = SXG_RSS_CPU_COUNT(adapter); + IsrCount = adapter->MsiEnabled ? RssIds : 1; napi_disable(&adapter->napi); spin_lock_irqsave(&sxg_global.driver_lock, sxg_global.flags); DBG_ERROR("sxg: %s (%s) ENTER\n", __func__, dev->name); + WRITE_REG(adapter->UcodeRegs[0].RcvCmd, 0, true); netif_stop_queue(adapter->netdev); adapter->state = ADAPT_DOWN; adapter->linkstate = LINK_DOWN; @@ -2104,13 +2169,57 @@ static int sxg_entry_halt(struct net_device *dev) DBG_ERROR("sxg: %s (%s) EXIT\n", __func__, dev->name); DBG_ERROR("sxg: %s EXIT\n", __func__); - /* Disable interrupts */ - SXG_DISABLE_ALL_INTERRUPTS(adapter); + /* Disable interrupts */ + SXG_DISABLE_ALL_INTERRUPTS(adapter); netif_carrier_off(dev); spin_unlock_irqrestore(&sxg_global.driver_lock, sxg_global.flags); sxg_deregister_interrupt(adapter); + WRITE_REG(HwRegs->Reset, 0xDEAD, FLUSH); + mdelay(5000); + spin_lock(&adapter->RcvQLock); + /* Free all the blocks and the buffers, moved from remove() routine */ + if (!(IsListEmpty(&adapter->AllRcvBlocks))) { + sxg_free_rcvblocks(adapter); + } + + + InitializeListHead(&adapter->FreeRcvBuffers); + InitializeListHead(&adapter->FreeRcvBlocks); + InitializeListHead(&adapter->AllRcvBlocks); + InitializeListHead(&adapter->FreeSglBuffers); + InitializeListHead(&adapter->AllSglBuffers); + + adapter->FreeRcvBufferCount = 0; + adapter->FreeRcvBlockCount = 0; + adapter->AllRcvBlockCount = 0; + adapter->RcvBuffersOnCard = 0; + adapter->PendingRcvCount = 0; + + memset(adapter->RcvRings, 0, sizeof(struct sxg_rcv_ring) * 1); + memset(adapter->EventRings, 0, sizeof(struct sxg_event_ring) * RssIds); + memset(adapter->Isr, 0, sizeof(u32) * IsrCount); + for (i = 0; i < SXG_MAX_RING_SIZE; i++) + adapter->RcvRingZeroInfo.Context[i] = NULL; + SXG_INITIALIZE_RING(adapter->RcvRingZeroInfo, SXG_RCV_RING_SIZE); + SXG_INITIALIZE_RING(adapter->XmtRingZeroInfo, SXG_XMT_RING_SIZE); + + spin_unlock(&adapter->RcvQLock); + + spin_lock_irqsave(&adapter->XmtZeroLock, flags); + adapter->AllSglBufferCount = 0; + adapter->FreeSglBufferCount = 0; + adapter->PendingXmtCount = 0; + memset(adapter->XmtRings, 0, sizeof(struct sxg_xmt_ring) * 1); + memset(adapter->XmtRingZeroIndex, 0, sizeof(u32)); + spin_unlock_irqrestore(&adapter->XmtZeroLock, flags); + + + for (i = 0; i < SXG_MAX_RSS; i++) { + adapter->NextEvent[i] = 0; + } + atomic_set(&adapter->pending_allocations, 0); return (STATUS_SUCCESS); } @@ -2392,6 +2501,20 @@ static int sxg_dumb_sgl(struct sxg_x64_sgl *pSgl, */ phys_addr = pci_map_single(adapter->pcidev, skb->data, skb->len, PCI_DMA_TODEVICE); + + /* + * SAHARA SGL WORKAROUND + * See if the SGL straddles a 64k boundary. If so, skip to + * the start of the next 64k boundary and continue + */ + + if (SXG_INVALID_SGL(phys_addr,skb->data_len)) + { + spin_unlock_irqrestore(&adapter->XmtZeroLock, flags); + /* Silently drop this packet */ + printk(KERN_EMERG"Dropped a packet for 64k boundary problem\n"); + return STATUS_SUCCESS; + } memset(XmtCmd, '\0', sizeof(*XmtCmd)); XmtCmd->Buffer.FirstSgeAddress = phys_addr; XmtCmd->Buffer.FirstSgeLength = DataLength; @@ -2838,6 +2961,37 @@ static void sxg_indicate_link_state(struct adapter_t *adapter, } } +/* + * sxg_change_mtu - Change the Maximum Transfer Unit + * * @returns 0 on success, negative on failure + */ +int sxg_change_mtu (struct net_device *netdev, int new_mtu) +{ + struct adapter_t *adapter = (struct adapter_t *) netdev_priv(netdev); + + if (!((new_mtu == SXG_DEFAULT_MTU) || (new_mtu == SXG_JUMBO_MTU))) + return -EINVAL; + + if(new_mtu == netdev->mtu) + return 0; + + netdev->mtu = new_mtu; + + if (new_mtu == SXG_JUMBO_MTU) { + adapter->JumboEnabled = TRUE; + adapter->FrameSize = JUMBOMAXFRAME; + adapter->ReceiveBufferSize = SXG_RCV_JUMBO_BUFFER_SIZE; + } else { + adapter->JumboEnabled = FALSE; + adapter->FrameSize = ETHERMAXFRAME; + adapter->ReceiveBufferSize = SXG_RCV_DATA_BUFFER_SIZE; + } + + sxg_entry_halt(netdev); + sxg_entry_open(netdev); + return 0; +} + /* * sxg_link_state - Set the link state and if necessary, indicate. * This routine the central point of processing for all link state changes. @@ -3742,6 +3896,7 @@ static int sxg_initialize_adapter(struct adapter_t *adapter) u32 RssIds, IsrCount; u32 i; int status; + int sxg_rcv_ring_size = SXG_RCV_RING_SIZE; SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "InitAdpt", adapter, 0, 0, 0); @@ -3796,7 +3951,9 @@ static int sxg_initialize_adapter(struct adapter_t *adapter) /* Receive ring base and size */ WRITE_REG64(adapter, adapter->UcodeRegs[0].RcvBase, adapter->PRcvRings, 0); - WRITE_REG(adapter->UcodeRegs[0].RcvSize, SXG_RCV_RING_SIZE, TRUE); + if (adapter->JumboEnabled == TRUE) + sxg_rcv_ring_size = SXG_JUMBO_RCV_RING_SIZE; + WRITE_REG(adapter->UcodeRegs[0].RcvSize, sxg_rcv_ring_size, TRUE); /* Populate the card with receive buffers */ sxg_stock_rcv_buffers(adapter); @@ -3933,6 +4090,8 @@ no_memory: static void sxg_stock_rcv_buffers(struct adapter_t *adapter) { struct sxg_rcv_descriptor_block_hdr *RcvDescriptorBlockHdr; + int sxg_rcv_data_buffers = SXG_RCV_DATA_BUFFERS; + int sxg_min_rcv_data_buffers = SXG_MIN_RCV_DATA_BUFFERS; SXG_TRACE(TRACE_SXG, SxgTraceBuffer, TRACE_NOISY, "StockBuf", adapter, adapter->RcvBuffersOnCard, @@ -3943,7 +4102,9 @@ static void sxg_stock_rcv_buffers(struct adapter_t *adapter) * we haven't exceeded our maximum.. get another block of buffers * None of this needs to be SMP safe. It's round numbers. */ - if ((adapter->FreeRcvBufferCount < SXG_MIN_RCV_DATA_BUFFERS) && + if (adapter->JumboEnabled == TRUE) + sxg_min_rcv_data_buffers = SXG_MIN_JUMBO_RCV_DATA_BUFFERS; + if ((adapter->FreeRcvBufferCount < sxg_min_rcv_data_buffers) && (adapter->AllRcvBlockCount < SXG_MAX_RCV_BLOCKS) && (atomic_read(&adapter->pending_allocations) == 0)) { sxg_allocate_buffer_memory(adapter, @@ -3953,7 +4114,9 @@ static void sxg_stock_rcv_buffers(struct adapter_t *adapter) } /* Now grab the RcvQLock lock and proceed */ spin_lock(&adapter->RcvQLock); - while (adapter->RcvBuffersOnCard < SXG_RCV_DATA_BUFFERS) { + if (adapter->JumboEnabled) + sxg_rcv_data_buffers = SXG_JUMBO_RCV_DATA_BUFFERS; + while (adapter->RcvBuffersOnCard < sxg_rcv_data_buffers) { struct list_entry *_ple; /* Get a descriptor block */ diff --git a/drivers/staging/sxg/sxg.h b/drivers/staging/sxg/sxg.h index ae77903c4aef..81d16803169e 100644 --- a/drivers/staging/sxg/sxg.h +++ b/drivers/staging/sxg/sxg.h @@ -108,7 +108,6 @@ struct sxg_stats { #define SXG_DROP_DUMB_SEND(_pAdapt, _skb) { \ ASSERT(_skb); \ - dev_kfree_skb(_skb); \ } /* @@ -132,6 +131,9 @@ struct sxg_stats { skb->next = NULL; \ _RcvDataBufferHdr->PhysicalAddress = pci_map_single(adapter->pcidev,\ _RcvDataBufferHdr->skb->data, BufferSize, PCI_DMA_FROMDEVICE); \ + if (SXG_INVALID_SGL(_RcvDataBufferHdr->PhysicalAddress,BufferSize)) \ + printk(KERN_EMERG "SXG_ALLOCATE_RCV_PACKET: RCV packet" \ + "non-64k boundary aligned\n"); \ } else { \ (_RcvDataBufferHdr)->skb = NULL; \ } \ @@ -758,6 +760,9 @@ struct slic_crash_info { #define ETHERMAXFRAME 1514 #define JUMBOMAXFRAME 9014 +#define SXG_JUMBO_MTU 9000 +#define SXG_DEFAULT_MTU 1500 + #if defined(CONFIG_X86_64) || defined(CONFIG_IA64) #define SXG_GET_ADDR_LOW(_addr) (u32)((u64)(_addr) & 0x00000000FFFFFFFF) #define SXG_GET_ADDR_HIGH(_addr) \ diff --git a/drivers/staging/sxg/sxghif.h b/drivers/staging/sxg/sxghif.h index 3675a1b56586..ae517798f6b5 100644 --- a/drivers/staging/sxg/sxghif.h +++ b/drivers/staging/sxg/sxghif.h @@ -418,6 +418,7 @@ struct sxg_event_ring { #define SXG_XMT_RING_SIZE 128 /* Start with 128 */ #define SXG_RCV_RING_SIZE 128 /* Start with 128 */ #define SXG_MAX_ENTRIES 4096 +#define SXG_JUMBO_RCV_RING_SIZE 32 /* Structure and macros to manage a ring */ struct sxg_ring_info { @@ -713,6 +714,11 @@ enum sxg_buffer_type { /* Minimum amount and when to get more */ #define SXG_MIN_RCV_DATA_BUFFERS 4096 #define SXG_MAX_RCV_BLOCKS 256 /* = 32k receive buffers */ +/* Amount to give to the card in case of jumbo frames */ +#define SXG_JUMBO_RCV_DATA_BUFFERS 2048 +/* Initial pool of buffers in case of jumbo buffers */ +#define SXG_INITIAL_JUMBO_RCV_DATA_BUFFERS 4096 +#define SXG_MIN_JUMBO_RCV_DATA_BUFFERS 1024 /* Receive buffer header */ struct sxg_rcv_data_buffer_hdr { @@ -874,10 +880,8 @@ extern struct sxg_sgl_pool_properties SxgSglPoolProperties[]; * We currently workaround this issue by allocating SGL buffers * in 64k blocks and skipping over buffers that straddle the boundary. */ -#define SXG_INVALID_SGL(_SxgSgl) \ - (((_SxgSgl)->PhysicalAddress.LowPart & 0xFFFF0000) != \ - (((_SxgSgl)->PhysicalAddress.LowPart + \ - SXG_SGL_SIZE((_SxgSgl)->Pool)) & 0xFFFF0000)) +#define SXG_INVALID_SGL(phys_addr,len) \ + (((phys_addr >> 16) != ( (phys_addr + len) >> 16 ))) /* * Allocate SGLs in blocks so we can skip over invalid entries. diff --git a/drivers/staging/sxg/sxghw.h b/drivers/staging/sxg/sxghw.h index efcbd453e160..cf26d7128ac2 100644 --- a/drivers/staging/sxg/sxghw.h +++ b/drivers/staging/sxg/sxghw.h @@ -271,10 +271,10 @@ struct sxg_hw_regs { /* * Macro to determine RCV_CONFIG_BUFLEN based on maximum frame size. * We add 18 bytes for Sahara receive status and padding, plus 4 bytes for CRC, - * and round up to nearest 16 byte boundary + * and round up to nearest 32 byte boundary */ #define RCV_CONFIG_BUFSIZE(_MaxFrame) \ - ((((_MaxFrame) + 22) + 15) & RCV_CONFIG_BUFLEN_MASK) + ((((_MaxFrame) + 22) + 31) & RCV_CONFIG_BUFLEN_MASK) /* XmtConfig register reset */ #define XMT_CONFIG_RESET 0x80000000 -- 2.30.2