This fixes several problems with CIS as suggested by Justin Gibbs:
4) The cardbus CIS code treats the CIS_PTR as a mapping register if it is mentioned in the CIS. I don't have a spec handy to understand why the CIS_PTR is mentioned in the CIS, but allocating a memory range for it is certainly bogus. My patch ignores bar #6 to prevent the mapping. [The pccard spec says that BAR 0 and 7 (-1 and 6 in thic case since we did a minus one) is "reserved". The off by 1 error has been fixed. also bar=5 is invalid for IO maps, so we check it.] 5) The CIS code allocated duplicate resources to those already found by cardbus_add_resources(). The fix is to pass in the bar computed from the CIS instead of the particular resource ID for that bar, so bus_generic_alloc_resource succeeds in finding the old resource. [fixed, also removed superfluous (and incorrect) writing back to the PCI config space.] 7) The CIS code seems to use the wrong bit to determine rather a particular register mapping is for I/O or memory space. From looking at the two cards I have, it seems TPL_BAR_REG_AS should be 0x10 instead of 0x08. Otherwise, all registers that should be I/O mapped gain a second mapping in memory space. [Oops, the spec does say 0x10..., fixed] Submitted by: Justin Gibbs
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@ -274,7 +274,7 @@ DECODE_PROTOTYPE(bar)
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type = SYS_RES_MEMORY;
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type = SYS_RES_MEMORY;
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}
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}
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bar = (reg & TPL_BAR_REG_ASI_MASK) - 1;
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bar = (reg & TPL_BAR_REG_ASI_MASK) - 1;
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if (bar < 0 || bar > 6) {
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if (bar < 0 || bar > 5 || (type == SYS_RES_IOPORT && bar == 5)) {
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device_printf(dev, "Invalid BAR number: %02x(%02x)\n",
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device_printf(dev, "Invalid BAR number: %02x(%02x)\n",
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reg, bar);
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reg, bar);
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return EINVAL;
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return EINVAL;
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@ -282,13 +282,10 @@ DECODE_PROTOTYPE(bar)
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bar = CARDBUS_BASE0_REG + bar * 4;
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bar = CARDBUS_BASE0_REG + bar * 4;
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DEVPRINTF((dev, "Opening BAR: type=%s, bar=%02x, len=%04x\n",
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DEVPRINTF((dev, "Opening BAR: type=%s, bar=%02x, len=%04x\n",
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(type==SYS_RES_MEMORY)?"MEM":"IO", bar, len));
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(type==SYS_RES_MEMORY)?"MEM":"IO", bar, len));
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res = bus_generic_alloc_resource(child, child, type, ®, 0,
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res = bus_generic_alloc_resource(child, child, type, &bar, 0,
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~0, len, rman_make_alignment_flags(len) | RF_ACTIVE);
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~0, len, rman_make_alignment_flags(len) | RF_ACTIVE);
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if (res == NULL) {
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if (res == NULL) {
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device_printf(dev, "Cannot allocate BAR %02x\n", reg);
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device_printf(dev, "Cannot allocate BAR %02x\n", bar);
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} else {
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start = rman_get_start(res);
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pci_write_config(child, reg, start, 4);
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}
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}
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}
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}
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return 0;
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return 0;
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@ -80,7 +80,7 @@ int cardbus_do_cis(device_t dev, device_t child);
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/* BAR */
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/* BAR */
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#define TPL_BAR_REG_ASI_MASK 0x07
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#define TPL_BAR_REG_ASI_MASK 0x07
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#define TPL_BAR_REG_AS 0x08
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#define TPL_BAR_REG_AS 0x10
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/* CISTPL_FUNC */
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/* CISTPL_FUNC */
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#define TPL_FUNC_MF 0 /* multi function tuple */
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#define TPL_FUNC_MF 0 /* multi function tuple */
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