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drivers: pci: add map_bar support for Enhanced Allocation

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Makes dm_pci_map_bar API available for integrated PCI devices that
support Enhanced Allocation instead of the original PCI BAR mechanism.

Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Alex Marginean
2019-06-07 11:24:23 +03:00
committed by Simon Glass
parent 2204bc1bd3
commit 0b143d8ab2
2 changed files with 59 additions and 0 deletions
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13
include/pci.h
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@@ -455,6 +455,17 @@
#define PCI_EXT_CAP_ID_PTM 0x1F /* Precision Time Measurement */
#define PCI_EXT_CAP_ID_MAX PCI_EXT_CAP_ID_PTM
/* Enhanced Allocation Registers */
#define PCI_EA_NUM_ENT 2 /* Number of Capability Entries */
#define PCI_EA_NUM_ENT_MASK 0x3f /* Num Entries Mask */
#define PCI_EA_FIRST_ENT 4 /* First EA Entry in List */
#define PCI_EA_ES 0x00000007 /* Entry Size */
#define PCI_EA_BEI 0x000000f0 /* BAR Equivalent Indicator */
/* Base, MaxOffset registers */
/* bit 0 is reserved */
#define PCI_EA_IS_64 0x00000002 /* 64-bit field flag */
#define PCI_EA_FIELD_MASK 0xfffffffc /* For Base & Max Offset */
/* Include the ID list */
#include <pci_ids.h>
@@ -1312,6 +1323,8 @@ pci_addr_t dm_pci_phys_to_bus(struct udevice *dev, phys_addr_t addr,
* that corresponds to it.
* Can be used for 32b BARs 0-5 on type 0 functions and for 32b BARs 0-1 on
* type 1 functions.
* Can also be used on type 0 functions that support Enhanced Allocation for
* 32b/64b BARs. Note that duplicate BEI entries are not supported.
*
* @dev: Device to check
* @bar: Bar register offset (PCI_BASE_ADDRESS_...)