From: Fabio Estevam <festevam@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] U-boot hangs on imx6 pci driver
Date: Tue, 27 May 2014 09:30:27 -0300 [thread overview]
Message-ID: <CAOMZO5DU_AbK59WuU8kypC4aoq0KmCN9wa7oFMOHRyXaNEUWOQ@mail.gmail.com> (raw)
Hi,
Working on a mx6solo board with PCIe driver enabled in U-boot, I
notice that after doing several reboots a hang is seen on the PCIe
driver:
PCI Autoconfig: Bus Memory region: [0x1100000-0x1efffff],
Physical Memory [1100000-1efffffx]
PCI Autoconfig: Bus I/O region: [0x1000000-0x10fffff],
Physical Memory: [1000000-10fffff]
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc00c
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc000
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc000
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc008
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
00:01.0 - 16c3:abcd - Bridge device
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc008
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc004
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc010
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
PCI Autoconfig: BAR 0, I/O, size=0xfff4, address=0x1000000
bus_lower=0x100fff4### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc014
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc004
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc00c
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc00c
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
PCI Autoconfig: Found P2P bridge, device 1
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc004
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc018
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc018
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc018
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc020
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc024
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc024
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc01c
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc030
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1ffc004
### 5 -> imx_pcie_read_config
### OUT -> imx_pcie_read_config
### IN -> imx_pcie_write_config
### OUT -> imx_pcie_write_config
### IN -> imx_pcie_read_config
### 1 -> imx_pcie_read_config
### 2 -> imx_pcie_read_config
### 3 -> imx_pcie_read_config
### 4 -> imx_pcie_read_config - va_address = 0x 1f0000c
(Hang)
As a quick workaround I tried the following:
--- a/drivers/pci/pcie_imx.c
+++ b/drivers/pci/pcie_imx.c
@@ -385,7 +385,8 @@ static int imx_pcie_read_config(struct pci_controller *hose,
*/
imx_pcie_fix_dabt_handler(true);
writel(0xffffffff, val);
- *val = readl(va_address);
+ if (0x01ffc000 <= va_address && va_address <= 0x01ffffff)
+ *val = readl(va_address);
imx_pcie_fix_dabt_handler(false);
and the hang does not happen. However, not all devices connected to
the PCI switch can be discovered.
Any suggestions?
Thanks,
Fabio Estevam
next reply other threads:[~2014-05-27 12:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-27 12:30 Fabio Estevam [this message]
2014-05-27 13:25 ` [U-Boot] U-boot hangs on imx6 pci driver Marek Vasut
2014-05-27 14:43 ` "David Müller (ELSOFT AG)"
2014-05-27 14:56 ` Marek Vasut
2014-05-28 7:40 ` "David Müller (ELSOFT AG)"
2014-05-28 16:43 ` Fabio Estevam
2014-05-30 7:04 ` "David Müller (ELSOFT AG)"
2014-06-05 0:16 ` Tim Harvey
2014-06-05 6:30 ` "David Müller (ELSOFT AG)"
2014-06-05 10:13 ` Tim Harvey
2014-06-20 0:11 ` Marek Vasut
2014-06-05 15:27 ` Fabio Estevam
2014-06-05 17:53 ` Marek Vasut
2014-06-05 19:20 ` Fabio Estevam
2014-06-05 22:04 ` Marek Vasut
2014-06-05 22:14 ` Fabio Estevam
2014-06-05 22:15 ` Marek Vasut
2014-06-06 4:35 ` Tim Harvey
2014-06-17 14:14 ` Fabio Estevam
2014-06-20 0:22 ` Marek Vasut
2014-05-28 16:42 ` Fabio Estevam
2014-05-28 18:31 ` Marek Vasut
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