[PATCH 5/6] QLA2 use pci read tuning interface

[Stephen Hemminger <shemminger@osdl.org>]

[-- Attachment #1: qla-mmrbc --]
[-- Type: text/plain, Size: 1693 bytes --]

(Resend of earlier patch, driver name conflicts with porn filters)

Use new PCI read tuning interface. This makes sure driver doesn't
run into PCI chipset errata problems now or in future.
Untested on real hardware.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>

--- pci-x.orig/drivers/scsi/qla2xxx/qla_init.c
+++ pci-x/drivers/scsi/qla2xxx/qla_init.c
@@ -250,7 +250,6 @@ qla24xx_pci_config(scsi_qla_host_t *ha)
 	uint32_t d;
 	unsigned long flags = 0;
 	struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
-	int pcix_cmd_reg, pcie_dctl_reg;
 
 	pci_set_master(ha->pdev);
 	mwi = 0;
@@ -265,28 +264,10 @@ qla24xx_pci_config(scsi_qla_host_t *ha)
 	pci_write_config_byte(ha->pdev, PCI_LATENCY_TIMER, 0x80);
 
 	/* PCI-X -- adjust Maximum Memory Read Byte Count (2048). */
-	pcix_cmd_reg = pci_find_capability(ha->pdev, PCI_CAP_ID_PCIX);
-	if (pcix_cmd_reg) {
-		uint16_t pcix_cmd;
-
-		pcix_cmd_reg += PCI_X_CMD;
-		pci_read_config_word(ha->pdev, pcix_cmd_reg, &pcix_cmd);
-		pcix_cmd &= ~PCI_X_CMD_MAX_READ;
-		pcix_cmd |= 0x0008;
-		pci_write_config_word(ha->pdev, pcix_cmd_reg, pcix_cmd);
-	}
+	pcix_set_mmrbc(ha->pdev, 2048);
 
 	/* PCIe -- adjust Maximum Read Request Size (2048). */
-	pcie_dctl_reg = pci_find_capability(ha->pdev, PCI_CAP_ID_EXP);
-	if (pcie_dctl_reg) {
-		uint16_t pcie_dctl;
-
-		pcie_dctl_reg += PCI_EXP_DEVCTL;
-		pci_read_config_word(ha->pdev, pcie_dctl_reg, &pcie_dctl);
-		pcie_dctl &= ~PCI_EXP_DEVCTL_READRQ;
-		pcie_dctl |= 0x4000;
-		pci_write_config_word(ha->pdev, pcie_dctl_reg, pcie_dctl);
-	}
+	pcie_set_readrq(ha->pdev, 2048);
 
 	/* Reset expansion ROM address decode enable */
 	pci_read_config_dword(ha->pdev, PCI_ROM_ADDRESS, &d);

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