From: Sven Schnelle <svens@stackframe.org>
Date: Thu, 14 Oct 2021 19:49:15 +0000 (+0200)
Subject: parisc/firmware: add functions to retrieve TOC data
X-Git-Tag: io_uring-5.16-2021-11-09~27^2~17
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=ecac70366dce374014f070b7eacd5865a9ab3b13;p=linux-block.git

parisc/firmware: add functions to retrieve TOC data

Add functions to retrieve TOC data from firmware both
for 1.1 and 2.0 PDC.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index b388d8176588..18b957a8630d 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -51,6 +51,8 @@ int pdc_spaceid_bits(unsigned long *space_bits);
 int pdc_btlb_info(struct pdc_btlb_info *btlb);
 int pdc_mem_map_hpa(struct pdc_memory_map *r_addr, struct pdc_module_path *mod_path);
 #endif /* !CONFIG_PA20 */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret);
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret);
 int pdc_lan_station_id(char *lan_addr, unsigned long net_hpa);
 
 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count);
diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index 7034227dbdf3..3370e347dde3 100644
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -1061,6 +1061,38 @@ int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
 	return retval;
 }
 
+/**
+ * pdc_pim_toc11 - Fetch TOC PIM 1.1 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc11(struct pdc_toc_pim_11 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(*ret));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
+/**
+ * pdc_pim_toc20 - Fetch TOC PIM 2.0 data from firmware.
+ * @ret: pointer to return buffer
+ */
+int pdc_pim_toc20(struct pdc_toc_pim_20 *ret)
+{
+	int retval;
+	unsigned long flags;
+
+	spin_lock_irqsave(&pdc_lock, flags);
+	retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result),
+			      __pa(ret), sizeof(*ret));
+	spin_unlock_irqrestore(&pdc_lock, flags);
+	return retval;
+}
+
 /**
  * pdc_tod_set - Set the Time-Of-Day clock.
  * @sec: The number of seconds since epoch.