From 8badd27aa0d7c02572fcd1a4a3c6b57d67f40b78 Mon Sep 17 00:00:00 2001 From: Eilon Greenstein Date: Thu, 12 Feb 2009 08:36:15 +0000 Subject: bnx2x: MSI support Enabling MSI on top of MSI-X and INTA. Also changing the module parameter to allow choosing INTA or MSI even when MSI-X is available. The default status block should not be reversed for endianity. Since MSI can issue re-configuration, the interrupt disable function now requires mmiowb Signed-off-by: Eilon Greenstein Signed-off-by: David S. Miller --- drivers/net/bnx2x_main.c | 155 +++++++++++++++++++++++++++++++++-------------- 1 file changed, 108 insertions(+), 47 deletions(-) (limited to 'drivers/net/bnx2x_main.c') diff --git a/drivers/net/bnx2x_main.c b/drivers/net/bnx2x_main.c index 60762f769efc..db8506d08fa5 100644 --- a/drivers/net/bnx2x_main.c +++ b/drivers/net/bnx2x_main.c @@ -77,17 +77,19 @@ static int multi_mode = 1; module_param(multi_mode, int, 0); static int disable_tpa; -static int use_inta; static int poll; static int debug; static int load_count[3]; /* 0-common, 1-port0, 2-port1 */ module_param(disable_tpa, int, 0); -module_param(use_inta, int, 0); + +static int int_mode; +module_param(int_mode, int, 0); +MODULE_PARM_DESC(int_mode, " Force interrupt mode (1 INT#x; 2 MSI)"); + module_param(poll, int, 0); module_param(debug, int, 0); MODULE_PARM_DESC(disable_tpa, "disable the TPA (LRO) feature"); -MODULE_PARM_DESC(use_inta, "use INT#A instead of MSI-X"); MODULE_PARM_DESC(poll, "use polling (for debug)"); MODULE_PARM_DESC(debug, "default debug msglevel"); @@ -588,34 +590,41 @@ static void bnx2x_int_enable(struct bnx2x *bp) u32 addr = port ? HC_REG_CONFIG_1 : HC_REG_CONFIG_0; u32 val = REG_RD(bp, addr); int msix = (bp->flags & USING_MSIX_FLAG) ? 1 : 0; + int msi = (bp->flags & USING_MSI_FLAG) ? 1 : 0; if (msix) { - val &= ~HC_CONFIG_0_REG_SINGLE_ISR_EN_0; + val &= ~(HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | + HC_CONFIG_0_REG_INT_LINE_EN_0); val |= (HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0 | HC_CONFIG_0_REG_ATTN_BIT_EN_0); + } else if (msi) { + val &= ~HC_CONFIG_0_REG_INT_LINE_EN_0; + val |= (HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | + HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0 | + HC_CONFIG_0_REG_ATTN_BIT_EN_0); } else { val |= (HC_CONFIG_0_REG_SINGLE_ISR_EN_0 | HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0 | HC_CONFIG_0_REG_INT_LINE_EN_0 | HC_CONFIG_0_REG_ATTN_BIT_EN_0); - DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x) MSI-X %d\n", - val, port, addr, msix); + DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x)\n", + val, port, addr); REG_WR(bp, addr, val); val &= ~HC_CONFIG_0_REG_MSI_MSIX_INT_EN_0; } - DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x) MSI-X %d\n", - val, port, addr, msix); + DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x) mode %s\n", + val, port, addr, (msix ? "MSI-X" : (msi ? "MSI" : "INTx"))); REG_WR(bp, addr, val); if (CHIP_IS_E1H(bp)) { /* init leading/trailing edge */ if (IS_E1HMF(bp)) { - val = (0xfe0f | (1 << (BP_E1HVN(bp) + 4))); + val = (0xee0f | (1 << (BP_E1HVN(bp) + 4))); if (bp->port.pmf) /* enable nig attention */ val |= 0x0100; @@ -641,6 +650,9 @@ static void bnx2x_int_disable(struct bnx2x *bp) DP(NETIF_MSG_INTR, "write %x to HC %d (addr 0x%x)\n", val, port, addr); + /* flush all outstanding writes */ + mmiowb(); + REG_WR(bp, addr, val); if (REG_RD(bp, addr) != val) BNX2X_ERR("BUG! proper val not read from IGU!\n"); @@ -649,7 +661,7 @@ static void bnx2x_int_disable(struct bnx2x *bp) static void bnx2x_int_disable_sync(struct bnx2x *bp, int disable_hw) { int msix = (bp->flags & USING_MSIX_FLAG) ? 1 : 0; - int i; + int i, offset; /* disable interrupt handling */ atomic_inc(&bp->intr_sem); @@ -659,11 +671,10 @@ static void bnx2x_int_disable_sync(struct bnx2x *bp, int disable_hw) /* make sure all ISRs are done */ if (msix) { + synchronize_irq(bp->msix_table[0].vector); + offset = 1; for_each_queue(bp, i) - synchronize_irq(bp->msix_table[i].vector); - - /* one more for the Slow Path IRQ */ - synchronize_irq(bp->msix_table[i].vector); + synchronize_irq(bp->msix_table[i + offset].vector); } else synchronize_irq(bp->pdev->irq); @@ -5198,6 +5209,8 @@ static int bnx2x_init_common(struct bnx2x *bp) REG_WR(bp, PXP2_REG_RQ_SRC_ENDIAN_M, 1); REG_WR(bp, PXP2_REG_RQ_CDU_ENDIAN_M, 1); REG_WR(bp, PXP2_REG_RQ_DBG_ENDIAN_M, 1); + /* make sure this value is 0 */ + REG_WR(bp, PXP2_REG_RQ_HC_ENDIAN_M, 0); /* REG_WR(bp, PXP2_REG_RD_PBF_SWAP_MODE, 1); */ REG_WR(bp, PXP2_REG_RD_QM_SWAP_MODE, 1); @@ -5648,10 +5661,17 @@ static int bnx2x_init_func(struct bnx2x *bp) { int port = BP_PORT(bp); int func = BP_FUNC(bp); + u32 addr, val; int i; DP(BNX2X_MSG_MCP, "starting func init func %x\n", func); + /* set MSI reconfigure capability */ + addr = (port ? HC_REG_CONFIG_1 : HC_REG_CONFIG_0); + val = REG_RD(bp, addr); + val |= HC_CONFIG_0_REG_MSI_ATTN_EN_0; + REG_WR(bp, addr, val); + i = FUNC_ILT_BASE(func); bnx2x_ilt_wr(bp, i, bnx2x_sp_mapping(bp, context)); @@ -6053,10 +6073,6 @@ static void bnx2x_free_msix_irqs(struct bnx2x *bp) "state %x\n", i, bp->msix_table[i + offset].vector, bnx2x_fp(bp, i, state)); - if (bnx2x_fp(bp, i, state) != BNX2X_FP_STATE_CLOSED) - BNX2X_ERR("IRQ of fp #%d being freed while " - "state != closed\n", i); - free_irq(bp->msix_table[i + offset].vector, &bp->fp[i]); } } @@ -6068,21 +6084,25 @@ static void bnx2x_free_irq(struct bnx2x *bp) pci_disable_msix(bp->pdev); bp->flags &= ~USING_MSIX_FLAG; + } else if (bp->flags & USING_MSI_FLAG) { + free_irq(bp->pdev->irq, bp->dev); + pci_disable_msi(bp->pdev); + bp->flags &= ~USING_MSI_FLAG; + } else free_irq(bp->pdev->irq, bp->dev); } static int bnx2x_enable_msix(struct bnx2x *bp) { - int i, rc, offset; + int i, rc, offset = 1; + int igu_vec = 0; - bp->msix_table[0].entry = 0; - offset = 1; - DP(NETIF_MSG_IFUP, "msix_table[0].entry = 0 (slowpath)\n"); + bp->msix_table[0].entry = igu_vec; + DP(NETIF_MSG_IFUP, "msix_table[0].entry = %d (slowpath)\n", igu_vec); for_each_queue(bp, i) { - int igu_vec = offset + i + BP_L_ID(bp); - + igu_vec = BP_L_ID(bp) + offset + i; bp->msix_table[i + offset].entry = igu_vec; DP(NETIF_MSG_IFUP, "msix_table[%d].entry = %d " "(fastpath #%u)\n", i + offset, igu_vec, i); @@ -6091,9 +6111,10 @@ static int bnx2x_enable_msix(struct bnx2x *bp) rc = pci_enable_msix(bp->pdev, &bp->msix_table[0], BNX2X_NUM_QUEUES(bp) + offset); if (rc) { - DP(NETIF_MSG_IFUP, "MSI-X is not attainable\n"); - return -1; + DP(NETIF_MSG_IFUP, "MSI-X is not attainable rc %d\n", rc); + return rc; } + bp->flags |= USING_MSIX_FLAG; return 0; @@ -6140,11 +6161,31 @@ static int bnx2x_req_msix_irqs(struct bnx2x *bp) return 0; } +static int bnx2x_enable_msi(struct bnx2x *bp) +{ + int rc; + + rc = pci_enable_msi(bp->pdev); + if (rc) { + DP(NETIF_MSG_IFUP, "MSI is not attainable\n"); + return -1; + } + bp->flags |= USING_MSI_FLAG; + + return 0; +} + static int bnx2x_req_irq(struct bnx2x *bp) { + unsigned long flags; int rc; - rc = request_irq(bp->pdev->irq, bnx2x_interrupt, IRQF_SHARED, + if (bp->flags & USING_MSI_FLAG) + flags = 0; + else + flags = IRQF_SHARED; + + rc = request_irq(bp->pdev->irq, bnx2x_interrupt, flags, bp->dev->name, bp->dev); if (!rc) bnx2x_fp(bp, 0, state) = BNX2X_FP_STATE_IRQ; @@ -6365,28 +6406,23 @@ static int bnx2x_setup_multi(struct bnx2x *bp, int index) } static int bnx2x_poll(struct napi_struct *napi, int budget); -static void bnx2x_set_rx_mode(struct net_device *dev); -/* must be called with rtnl_lock */ -static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) +static void bnx2x_set_int_mode(struct bnx2x *bp) { - u32 load_code; - int i, rc = 0; int num_queues; -#ifdef BNX2X_STOP_ON_ERROR - if (unlikely(bp->panic)) - return -EPERM; -#endif - - bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD; - if (use_inta) { + switch (int_mode) { + case INT_MODE_INTx: + case INT_MODE_MSI: num_queues = 1; bp->num_rx_queues = num_queues; bp->num_tx_queues = num_queues; DP(NETIF_MSG_IFUP, "set number of queues to %d\n", num_queues); - } else { + break; + + case INT_MODE_MSIX: + default: if (bp->multi_mode == ETH_RSS_MODE_REGULAR) num_queues = min_t(u32, num_online_cpus(), BNX2X_MAX_QUEUES(bp)); @@ -6401,8 +6437,7 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) * so try to enable MSI-X with the requested number of fp's * and fallback to MSI or legacy INTx with one fp */ - rc = bnx2x_enable_msix(bp); - if (rc) { + if (bnx2x_enable_msix(bp)) { /* failed to enable MSI-X */ num_queues = 1; bp->num_rx_queues = num_queues; @@ -6412,8 +6447,27 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) "enable MSI-X set number of " "queues to %d\n", num_queues); } + break; } bp->dev->real_num_tx_queues = bp->num_tx_queues; +} + +static void bnx2x_set_rx_mode(struct net_device *dev); + +/* must be called with rtnl_lock */ +static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) +{ + u32 load_code; + int i, rc = 0; +#ifdef BNX2X_STOP_ON_ERROR + DP(NETIF_MSG_IFUP, "enter load_mode %d\n", load_mode); + if (unlikely(bp->panic)) + return -EPERM; +#endif + + bp->state = BNX2X_STATE_OPENING_WAIT4_LOAD; + + bnx2x_set_int_mode(bp); if (bnx2x_alloc_mem(bp)) return -ENOMEM; @@ -6445,14 +6499,22 @@ static int bnx2x_nic_load(struct bnx2x *bp, int load_mode) pci_disable_msix(bp->pdev); goto load_error1; } - printk(KERN_INFO PFX "%s: using MSI-X\n", bp->dev->name); } else { + if ((rc != -ENOMEM) && (int_mode != INT_MODE_INTx)) + bnx2x_enable_msi(bp); bnx2x_ack_int(bp); rc = bnx2x_req_irq(bp); if (rc) { BNX2X_ERR("IRQ request failed rc %d, aborting\n", rc); + if (bp->flags & USING_MSI_FLAG) + pci_disable_msi(bp->pdev); goto load_error1; } + if (bp->flags & USING_MSI_FLAG) { + bp->dev->irq = bp->pdev->irq; + printk(KERN_INFO PFX "%s: using MSI IRQ %d\n", + bp->dev->name, bp->pdev->irq); + } } /* Send LOAD_REQUEST command to MCP @@ -6689,8 +6751,6 @@ static void bnx2x_reset_func(struct bnx2x *bp) REG_WR(bp, HC_REG_LEADING_EDGE_0 + port*8, 0); REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, 0); - REG_WR(bp, HC_REG_CONFIG_0 + port*4, 0x1000); - /* Clear ILT */ base = FUNC_ILT_BASE(func); for (i = base; i < base + ILT_PER_FUNC; i++) @@ -7636,9 +7696,10 @@ static int __devinit bnx2x_init_bp(struct bnx2x *bp) "MCP disabled, must load devices in order!\n"); /* Set multi queue mode */ - if ((multi_mode != ETH_RSS_MODE_DISABLED) && (!use_inta)) { + if ((multi_mode != ETH_RSS_MODE_DISABLED) && + ((int_mode == INT_MODE_INTx) || (int_mode == INT_MODE_MSI))) { printk(KERN_ERR PFX - "Multi disabled since INTA is requested\n"); + "Multi disabled since int_mode requested is not MSI-X\n"); multi_mode = ETH_RSS_MODE_DISABLED; } bp->multi_mode = multi_mode; -- cgit v1.2.2