sata_mv: Fix broken Marvell 7042 support.

sata_mv:  Fix broken Marvell 7042 support.

The Marvell 7042 chip is more or less the same as the 6042 internally,
but sports a PCIe bus.  Despite having identical SATA cores, the 7042
does differ from its PCI bus counterparts in placment and layout of
certain bus related registers.

This patch fixes sata_mv to distinguish between the PCI bus registers
of earlier chips, and the PCIe bus registers of the 7042.

Specifically, move the offsets and bit patterns for the
PCI/PCIe interrupt cause/mask registers into the struct mv_host_priv,
as these values differ between the 6xxx and 7xxx series chips.

This fixes the driver to not access reserved PCI addresses,
and prevents the lockups reported in linux-2.6.24 with 7042 boards.

Also add a new PCI ID for the Highpoint 2300 7042-based board
that I'm using for testing this stuff here.

Tested with Marvell 6081 + 7042 chips, on x86 & x86_64.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 42 insertions, 20 deletions

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index 97c3e116977e..8d864e5e97ed 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -164,10 +164,14 @@ enum {
         MV_PCI_ERR_ATTRIBUTE    = 0x1d48,
         MV_PCI_ERR_COMMAND      = 0x1d50,
 
-        PCI_IRQ_CAUSE_OFS               = 0x1d58,
-        PCI_IRQ_MASK_OFS                = 0x1d5c,
+        PCI_IRQ_CAUSE_OFS       = 0x1d58,
+        PCI_IRQ_MASK_OFS        = 0x1d5c,
         PCI_UNMASK_ALL_IRQS     = 0x7fffff,     /* bits 22-0 */
 
+        PCIE_IRQ_CAUSE_OFS      = 0x1900,
+        PCIE_IRQ_MASK_OFS       = 0x1910,
+        PCIE_UNMASK_ALL_IRQS    = 0x70a,        /* assorted bits */
+
         HC_MAIN_IRQ_CAUSE_OFS   = 0x1d60,
         HC_MAIN_IRQ_MASK_OFS    = 0x1d64,
         PORT0_ERR               = (1 << 0),     /* shift by port # */
@@ -303,6 +307,7 @@ enum {
         MV_HP_GEN_I             = (1 << 6),     /* Generation I: 50xx */
         MV_HP_GEN_II            = (1 << 7),     /* Generation II: 60xx */
         MV_HP_GEN_IIE           = (1 << 8),     /* Generation IIE: 6042/7042 */
+        MV_HP_PCIE              = (1 << 9),     /* PCIe bus/regs: 7042 */
 
         /* Port private flags (pp_flags) */
         MV_PP_FLAG_EDMA_EN      = (1 << 0),     /* is EDMA engine enabled? */
@@ -388,7 +393,15 @@ struct mv_port_signal {
         u32                     pre;
 };
 
-struct mv_host_priv;
+struct mv_host_priv {
+        u32                     hp_flags;
+        struct mv_port_signal   signal[8];
+        const struct mv_hw_ops  *ops;
+        u32                     irq_cause_ofs;
+        u32                     irq_mask_ofs;
+        u32                     unmask_all_irqs;
+};
+
 struct mv_hw_ops {
         void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio,
                            unsigned int port);
@@ -401,12 +414,6 @@ struct mv_hw_ops {
         void (*reset_bus)(struct pci_dev *pdev, void __iomem *mmio);
 };
 
-struct mv_host_priv {
-        u32                     hp_flags;
-        struct mv_port_signal   signal[8];
-        const struct mv_hw_ops  *ops;
-};
-
 static void mv_irq_clear(struct ata_port *ap);
 static int mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val);
 static int mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
@@ -631,11 +638,13 @@ static const struct pci_device_id mv_pci_tbl[] = {
         /* Adaptec 1430SA */
         { PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 },
 
-        { PCI_VDEVICE(TTI, 0x2310), chip_7042 },
-
-        /* add Marvell 7042 support */
+        /* Marvell 7042 support */
         { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
 
+        /* Highpoint RocketRAID PCIe series */
+        { PCI_VDEVICE(TTI, 0x2300), chip_7042 },
+        { PCI_VDEVICE(TTI, 0x2310), chip_7042 },
+
         { }                     /* terminate list */
 };
 
@@ -1648,13 +1657,14 @@ static void mv_host_intr(struct ata_host *host, u32 relevant, unsigned int hc)
 
 static void mv_pci_error(struct ata_host *host, void __iomem *mmio)
 {
+        struct mv_host_priv *hpriv = host->private_data;
         struct ata_port *ap;
         struct ata_queued_cmd *qc;
         struct ata_eh_info *ehi;
         unsigned int i, err_mask, printed = 0;
         u32 err_cause;
 
-        err_cause = readl(mmio + PCI_IRQ_CAUSE_OFS);
+        err_cause = readl(mmio + hpriv->irq_cause_ofs);
 
         dev_printk(KERN_ERR, host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n",
                    err_cause);
@@ -1662,7 +1672,7 @@ static void mv_pci_error(struct ata_host *host, void __iomem *mmio)
         DPRINTK("All regs @ PCI error\n");
         mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
 
-        writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
+        writelfl(0, mmio + hpriv->irq_cause_ofs);
 
         for (i = 0; i < host->n_ports; i++) {
                 ap = host->ports[i];
@@ -1926,6 +1936,8 @@ static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
 #define ZERO(reg) writel(0, mmio + (reg))
 static void mv_reset_pci_bus(struct pci_dev *pdev, void __iomem *mmio)
 {
+        struct ata_host     *host = dev_get_drvdata(&pdev->dev);
+        struct mv_host_priv *hpriv = host->private_data;
         u32 tmp;
 
         tmp = readl(mmio + MV_PCI_MODE);
@@ -1937,8 +1949,8 @@ static void mv_reset_pci_bus(struct pci_dev *pdev, void __iomem *mmio)
         writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
         ZERO(HC_MAIN_IRQ_MASK_OFS);
         ZERO(MV_PCI_SERR_MASK);
-        ZERO(PCI_IRQ_CAUSE_OFS);
-        ZERO(PCI_IRQ_MASK_OFS);
+        ZERO(hpriv->irq_cause_ofs);
+        ZERO(hpriv->irq_mask_ofs);
         ZERO(MV_PCI_ERR_LOW_ADDRESS);
         ZERO(MV_PCI_ERR_HIGH_ADDRESS);
         ZERO(MV_PCI_ERR_ATTRIBUTE);
@@ -2490,6 +2502,7 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
                 break;
 
         case chip_7042:
+                hp_flags |= MV_HP_PCIE;
         case chip_6042:
                 hpriv->ops = &mv6xxx_ops;
                 hp_flags |= MV_HP_GEN_IIE;
@@ -2516,6 +2529,15 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
         }
 
         hpriv->hp_flags = hp_flags;
+        if (hp_flags & MV_HP_PCIE) {
+                hpriv->irq_cause_ofs    = PCIE_IRQ_CAUSE_OFS;
+                hpriv->irq_mask_ofs     = PCIE_IRQ_MASK_OFS;
+                hpriv->unmask_all_irqs  = PCIE_UNMASK_ALL_IRQS;
+        } else {
+                hpriv->irq_cause_ofs    = PCI_IRQ_CAUSE_OFS;
+                hpriv->irq_mask_ofs     = PCI_IRQ_MASK_OFS;
+                hpriv->unmask_all_irqs  = PCI_UNMASK_ALL_IRQS;
+        }
 
         return 0;
 }
@@ -2595,10 +2617,10 @@ static int mv_init_host(struct ata_host *host, unsigned int board_idx)
         }
 
         /* Clear any currently outstanding host interrupt conditions */
-        writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
+        writelfl(0, mmio + hpriv->irq_cause_ofs);
 
         /* and unmask interrupt generation for host regs */
-        writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS);
+        writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_ofs);
 
         if (IS_GEN_I(hpriv))
                 writelfl(~HC_MAIN_MASKED_IRQS_5, mmio + HC_MAIN_IRQ_MASK_OFS);
@@ -2609,8 +2631,8 @@ static int mv_init_host(struct ata_host *host, unsigned int board_idx)
                 "PCI int cause/mask=0x%08x/0x%08x\n",
                 readl(mmio + HC_MAIN_IRQ_CAUSE_OFS),
                 readl(mmio + HC_MAIN_IRQ_MASK_OFS),
-                readl(mmio + PCI_IRQ_CAUSE_OFS),
-                readl(mmio + PCI_IRQ_MASK_OFS));
+                readl(mmio + hpriv->irq_cause_ofs),
+                readl(mmio + hpriv->irq_mask_ofs));
 
 done:
         return rc;