diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.4/023-bus-mvebu-mbus-provide-api-for-obtaining-IO-and-DRAM.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.4/023-bus-mvebu-mbus-provide-api-for-obtaining-IO-and-DRAM.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.4/023-bus-mvebu-mbus-provide-api-for-obtaining-IO-and-DRAM.patch b/target/linux/mvebu/patches-4.4/023-bus-mvebu-mbus-provide-api-for-obtaining-IO-and-DRAM.patch new file mode 100644 index 0000000000..58687f36ad --- /dev/null +++ b/target/linux/mvebu/patches-4.4/023-bus-mvebu-mbus-provide-api-for-obtaining-IO-and-DRAM.patch @@ -0,0 +1,94 @@ +From: Marcin Wojtas <mw@semihalf.com> +Date: Mon, 14 Mar 2016 09:39:02 +0100 +Subject: [PATCH] bus: mvebu-mbus: provide api for obtaining IO and DRAM window + information + +This commit enables finding appropriate mbus window and obtaining its +target id and attribute for given physical address in two separate +routines, both for IO and DRAM windows. This functionality +is needed for Armada XP/38x Network Controller's Buffer Manager and +PnC configuration. + +[gregory.clement@free-electrons.com: Fix size test for +mvebu_mbus_get_dram_win_info] + +Signed-off-by: Marcin Wojtas <mw@semihalf.com> +[DRAM window information reference in LKv3.10] +Signed-off-by: Evan Wang <xswang@marvell.com> +Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + +--- a/drivers/bus/mvebu-mbus.c ++++ b/drivers/bus/mvebu-mbus.c +@@ -948,6 +948,58 @@ void mvebu_mbus_get_pcie_io_aperture(str + *res = mbus_state.pcie_io_aperture; + } + ++int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr) ++{ ++ const struct mbus_dram_target_info *dram; ++ int i; ++ ++ /* Get dram info */ ++ dram = mv_mbus_dram_info(); ++ if (!dram) { ++ pr_err("missing DRAM information\n"); ++ return -ENODEV; ++ } ++ ++ /* Try to find matching DRAM window for phyaddr */ ++ for (i = 0; i < dram->num_cs; i++) { ++ const struct mbus_dram_window *cs = dram->cs + i; ++ ++ if (cs->base <= phyaddr && ++ phyaddr <= (cs->base + cs->size - 1)) { ++ *target = dram->mbus_dram_target_id; ++ *attr = cs->mbus_attr; ++ return 0; ++ } ++ } ++ ++ pr_err("invalid dram address 0x%x\n", phyaddr); ++ return -EINVAL; ++} ++EXPORT_SYMBOL_GPL(mvebu_mbus_get_dram_win_info); ++ ++int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target, ++ u8 *attr) ++{ ++ int win; ++ ++ for (win = 0; win < mbus_state.soc->num_wins; win++) { ++ u64 wbase; ++ int enabled; ++ ++ mvebu_mbus_read_window(&mbus_state, win, &enabled, &wbase, ++ size, target, attr, NULL); ++ ++ if (!enabled) ++ continue; ++ ++ if (wbase <= phyaddr && phyaddr <= wbase + *size) ++ return win; ++ } ++ ++ return -EINVAL; ++} ++EXPORT_SYMBOL_GPL(mvebu_mbus_get_io_win_info); ++ + static __init int mvebu_mbus_debugfs_init(void) + { + struct mvebu_mbus_state *s = &mbus_state; +--- a/include/linux/mbus.h ++++ b/include/linux/mbus.h +@@ -69,6 +69,9 @@ static inline const struct mbus_dram_tar + int mvebu_mbus_save_cpu_target(u32 *store_addr); + void mvebu_mbus_get_pcie_mem_aperture(struct resource *res); + void mvebu_mbus_get_pcie_io_aperture(struct resource *res); ++int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr); ++int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target, ++ u8 *attr); + int mvebu_mbus_add_window_remap_by_id(unsigned int target, + unsigned int attribute, + phys_addr_t base, size_t size, |