From: Venkatraman S <svenkatr@ti.com>
To: <linux-mmc@vger.kernel.org>, <cjb@laptop.org>,
<linux-mm@kvack.org>, <linux-fsdevel@vger.kernel.org>,
<linux-omap@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>, <arnd.bergmann@linaro.org>,
<alex.lemberg@sandisk.com>, <ilan.smith@sandisk.com>,
<lporzio@micron.com>, <rmk+kernel@arm.linux.org.uk>,
Venkatraman S <svenkatr@ti.com>
Subject: [PATCH v2 07/16] mmc: core: helper function for finding preemptible command
Date: Thu, 3 May 2012 19:53:06 +0530 [thread overview]
Message-ID: <1336054995-22988-8-git-send-email-svenkatr@ti.com> (raw)
In-Reply-To: <1336054995-22988-1-git-send-email-svenkatr@ti.com>
According to table30 in eMMC spec, only some commands
can be preempted by foreground HPI. Provide a helper function
for the HPI procedure to identify if the command is
preemptible.
Signed-off-by: Venkatraman S <svenkatr@ti.com>
---
include/linux/mmc/core.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 1b431c7..680e256 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -10,6 +10,7 @@
#include <linux/interrupt.h>
#include <linux/completion.h>
+#include <linux/mmc/mmc.h>
struct request;
struct mmc_data;
@@ -192,6 +193,18 @@ static inline void mmc_claim_host(struct mmc_host *host)
__mmc_claim_host(host, NULL);
}
+static inline bool mmc_is_preemptible_command(struct mmc_command *cmd)
+{
+ if ((cmd->opcode == MMC_SWITCH && (cmd->arg == EXT_CSD_BKOPS_START ||
+ cmd->arg == EXT_CSD_SANITIZE_START ||
+ cmd->arg == EXT_CSD_FLUSH_CACHE))
+ || (cmd->opcode == MMC_ERASE)
+ || (cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK)
+ || (cmd->opcode == MMC_WRITE_BLOCK))
+ return true;
+ return false;
+}
+
extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max);
#endif /* LINUX_MMC_CORE_H */
--
1.7.10.rc2
next prev parent reply other threads:[~2012-05-03 14:24 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-03 14:22 [PATCHv2 00/16] [FS, MM, block, MMC]: eMMC High Priority Interrupt Feature Venkatraman S
2012-05-03 14:23 ` [PATCH v2 01/16] FS: Added demand paging markers to filesystem Venkatraman S
2012-05-06 23:31 ` Dave Chinner
2012-05-07 16:46 ` S, Venkatraman
2012-05-09 0:33 ` Dave Chinner
2012-05-09 13:59 ` Arnd Bergmann
2012-05-09 15:03 ` Christoph Hellwig
2012-05-09 16:54 ` Arnd Bergmann
2012-05-09 15:27 ` Vivek Goyal
[not found] ` <CAB+TZU8FNWuHrf6Hqnjs5fwH8yMJgd=CLPB0iUkrs2a-fgehtQ@mail.gmail.com>
2012-05-08 16:35 ` S, Venkatraman
2012-05-03 14:23 ` [PATCH v2 02/16] MM: Added page swapping markers to memory management Venkatraman S
2012-05-03 14:23 ` [PATCH v2 03/16] block: add queue attributes to manage dpmg and swapin requests Venkatraman S
2012-05-03 14:23 ` [PATCH v2 04/16] block: add sysfs attributes for runtime control of dpmg and swapin Venkatraman S
2012-05-03 14:23 ` [PATCH v2 05/16] block: Documentation: add sysfs ABI for expedite_dmpg and expedite_swapin Venkatraman S
2012-05-03 14:23 ` [PATCH v2 06/16] block: treat DMPG and SWAPIN requests as special Venkatraman S
2012-05-03 14:38 ` Jeff Moyer
2012-05-03 16:22 ` S, Venkatraman
2012-05-03 14:23 ` Venkatraman S [this message]
2012-05-03 14:23 ` [PATCH v2 08/16] mmc: core: add preemptibility tracking fields to mmc command Venkatraman S
2012-05-03 14:23 ` [PATCH v2 09/16] mmc: core: Add MMC abort interface Venkatraman S
2012-05-03 14:23 ` [PATCH v2 10/16] mmc: block: Detect HPI support in card and host controller Venkatraman S
2012-05-03 14:23 ` [PATCH v2 11/16] mmc: core: Implement foreground request preemption procedure Venkatraman S
2012-05-03 14:23 ` [PATCH v2 12/16] mmc: sysfs: Add sysfs entry for tuning preempt_time_threshold Venkatraman S
2012-05-03 14:23 ` [PATCH v2 13/16] mmc: Documentation: Add sysfs ABI for hpi_time_threshold Venkatraman S
2012-05-03 14:23 ` [PATCH v2 14/16] mmc: block: Implement HPI invocation and handling logic Venkatraman S
2012-05-09 8:35 ` kdorfman
2012-05-09 14:01 ` Arnd Bergmann
2012-05-09 14:06 ` S, Venkatraman
2012-05-03 14:23 ` [PATCH v2 15/16] mmc: Update preempted request with CORRECTLY_PRG_SECTORS_NUM info Venkatraman S
2012-05-03 14:23 ` [PATCH v2 16/16] mmc: omap_hsmmc: Implement abort_req host_ops Venkatraman S
2012-05-08 7:46 ` [PATCHv2 00/16] [FS, MM, block, MMC]: eMMC High Priority Interrupt Feature Minchan Kim
2012-05-08 16:31 ` S, Venkatraman
2012-05-09 0:45 ` Minchan Kim
2012-05-11 19:18 ` S, Venkatraman
[not found] ` <CAB+TZU-r6aYn8WRZjZ0DojxMTMoc5MSx7c93W0pAad1coscPwQ@mail.gmail.com>
2012-05-14 7:55 ` Minchan Kim
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