From: Roland Dreier Date: Sun, 6 Sep 2009 03:24:49 +0000 (-0700) Subject: mlx4_core: Allocate and map sufficient ICM memory for EQ context X-Git-Tag: firefly_0821_release~13016^2~1^6~3 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fa0681d2129732027355d6b7083dd8932b9b799d;p=firefly-linux-kernel-4.4.55.git mlx4_core: Allocate and map sufficient ICM memory for EQ context The current implementation allocates a single host page for EQ context memory, which was OK when we only allocated a few EQs. However, since we now allocate an EQ for each CPU core, this patch removes the hard-coded limit (which we exceed with 4 KB pages and 128 byte EQ context entries with 32 CPUs) and uses the same ICM table code as all other context tables, which ends up simplifying the code quite a bit while fixing the problem. This problem was actually hit in practice on a dual-socket Nehalem box with 16 real hardware threads and sufficiently odd ACPI tables that it shows on boot SMP: Allowing 32 CPUs, 16 hotplug CPUs so num_possible_cpus() ends up 32, and mlx4 ends up creating 33 MSI-X interrupts and 33 EQs. This mlx4 bug means that mlx4 can't even initialize at all on this quite mainstream system. Cc: Reported-by: Eli Cohen Tested-by: Christoph Lameter Signed-off-by: Roland Dreier --- diff --git a/drivers/net/mlx4/eq.c b/drivers/net/mlx4/eq.c index c11a0525c40e..d7974a60b961 100644 --- a/drivers/net/mlx4/eq.c +++ b/drivers/net/mlx4/eq.c @@ -525,48 +525,6 @@ static void mlx4_unmap_clr_int(struct mlx4_dev *dev) iounmap(priv->clr_base); } -int mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - int ret; - - /* - * We assume that mapping one page is enough for the whole EQ - * context table. This is fine with all current HCAs, because - * we only use 32 EQs and each EQ uses 64 bytes of context - * memory, or 1 KB total. - */ - priv->eq_table.icm_virt = icm_virt; - priv->eq_table.icm_page = alloc_page(GFP_HIGHUSER); - if (!priv->eq_table.icm_page) - return -ENOMEM; - priv->eq_table.icm_dma = pci_map_page(dev->pdev, priv->eq_table.icm_page, 0, - PAGE_SIZE, PCI_DMA_BIDIRECTIONAL); - if (pci_dma_mapping_error(dev->pdev, priv->eq_table.icm_dma)) { - __free_page(priv->eq_table.icm_page); - return -ENOMEM; - } - - ret = mlx4_MAP_ICM_page(dev, priv->eq_table.icm_dma, icm_virt); - if (ret) { - pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE, - PCI_DMA_BIDIRECTIONAL); - __free_page(priv->eq_table.icm_page); - } - - return ret; -} - -void mlx4_unmap_eq_icm(struct mlx4_dev *dev) -{ - struct mlx4_priv *priv = mlx4_priv(dev); - - mlx4_UNMAP_ICM(dev, priv->eq_table.icm_virt, 1); - pci_unmap_page(dev->pdev, priv->eq_table.icm_dma, PAGE_SIZE, - PCI_DMA_BIDIRECTIONAL); - __free_page(priv->eq_table.icm_page); -} - int mlx4_alloc_eq_table(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); diff --git a/drivers/net/mlx4/main.c b/drivers/net/mlx4/main.c index 5c1afe0d73e8..528f89b2cde3 100644 --- a/drivers/net/mlx4/main.c +++ b/drivers/net/mlx4/main.c @@ -525,7 +525,10 @@ static int mlx4_init_icm(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap, goto err_unmap_aux; } - err = mlx4_map_eq_icm(dev, init_hca->eqc_base); + err = mlx4_init_icm_table(dev, &priv->eq_table.table, + init_hca->eqc_base, dev_cap->eqc_entry_sz, + dev->caps.num_eqs, dev->caps.num_eqs, + 0, 0); if (err) { mlx4_err(dev, "Failed to map EQ context memory, aborting.\n"); goto err_unmap_cmpt; @@ -668,7 +671,7 @@ err_unmap_mtt: mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table); err_unmap_eq: - mlx4_unmap_eq_icm(dev); + mlx4_cleanup_icm_table(dev, &priv->eq_table.table); err_unmap_cmpt: mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table); @@ -698,11 +701,11 @@ static void mlx4_free_icms(struct mlx4_dev *dev) mlx4_cleanup_icm_table(dev, &priv->qp_table.qp_table); mlx4_cleanup_icm_table(dev, &priv->mr_table.dmpt_table); mlx4_cleanup_icm_table(dev, &priv->mr_table.mtt_table); + mlx4_cleanup_icm_table(dev, &priv->eq_table.table); mlx4_cleanup_icm_table(dev, &priv->eq_table.cmpt_table); mlx4_cleanup_icm_table(dev, &priv->cq_table.cmpt_table); mlx4_cleanup_icm_table(dev, &priv->srq_table.cmpt_table); mlx4_cleanup_icm_table(dev, &priv->qp_table.cmpt_table); - mlx4_unmap_eq_icm(dev); mlx4_UNMAP_ICM_AUX(dev); mlx4_free_icm(dev, priv->fw.aux_icm, 0); diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h index 5bd79c2b184f..bc72d6e4919b 100644 --- a/drivers/net/mlx4/mlx4.h +++ b/drivers/net/mlx4/mlx4.h @@ -205,9 +205,7 @@ struct mlx4_eq_table { void __iomem **uar_map; u32 clr_mask; struct mlx4_eq *eq; - u64 icm_virt; - struct page *icm_page; - dma_addr_t icm_dma; + struct mlx4_icm_table table; struct mlx4_icm_table cmpt_table; int have_irq; u8 inta_pin; @@ -373,9 +371,6 @@ u64 mlx4_make_profile(struct mlx4_dev *dev, struct mlx4_dev_cap *dev_cap, struct mlx4_init_hca_param *init_hca); -int mlx4_map_eq_icm(struct mlx4_dev *dev, u64 icm_virt); -void mlx4_unmap_eq_icm(struct mlx4_dev *dev); - int mlx4_cmd_init(struct mlx4_dev *dev); void mlx4_cmd_cleanup(struct mlx4_dev *dev); void mlx4_cmd_event(struct mlx4_dev *dev, u16 token, u8 status, u64 out_param);